Disclosure of Invention
The embodiment of the invention provides an energy storage air conditioning system, a control method and a control device thereof, which are used for solving the problems of large hollow allocation capacitance and high electricity consumption in the prior art.
In order to solve the technical problems, the embodiment of the invention provides an energy storage air conditioning system, which comprises a compressor, a first converter, an energy storage battery and a second converter;
the energy storage battery and the second converter are positioned in the air conditioner external unit, and the energy storage battery is connected to a power grid through the second converter;
The compressor is connected to the power grid through the first converter;
and the energy storage battery is used for charging and discharging according to the current power distribution control strategy of the energy storage air conditioning system, wherein the energy storage battery discharges to supply power for the air conditioner.
Optionally, the energy storage air conditioning system further comprises a switch, one end of the switch is connected to the output end of the second converter, the other end of the switch is connected to the energy storage battery, and the switch is used for stopping charging and discharging of the energy storage battery under the condition of disconnection.
Optionally, the energy storage air conditioning system further comprises a soft start circuit, wherein the input end of the soft start circuit is connected to the power grid, and the output end of the soft start circuit is connected to the input end of the first converter and the input end of the second converter.
Optionally, the energy storage air conditioning system further comprises a main controller, which is connected to the energy storage battery, the input end of the first converter and the input end of the second converter, and is used for determining a current power distribution control strategy of the energy storage air conditioning system, and under the current power distribution control strategy, the charge and discharge of the energy storage battery and the operation of the air conditioner are controlled according to the charge state of the energy storage battery, the electric power of the air conditioner and the current electric time period in the energy storage air conditioning system.
Optionally, the energy storage air conditioning system further comprises a battery management system connected to the energy storage battery and used for monitoring the state of the energy storage battery and providing protection for the energy storage battery, and the battery management system, the first converter and the second converter are in non-primary communication connection.
Optionally, the energy storage air conditioning system further comprises an auxiliary power supply which is respectively connected to the power grid, the first converter, the second converter and the battery management system and is used for taking power from the power grid and supplying power to the first converter, the second converter and the battery management system.
Optionally, if the power grid is a direct current micro-grid, the first converter is a DC/AC, the second converter is a DC/DC, if the power grid is an alternating current micro-grid, the first converter is an AC/AC, the second converter is an AC/DC, and if the power grid is an alternating current/direct current hybrid micro-grid, the first converter is a DC/AC or an AC/AC, and the second converter is a DC/DC or an AC/DC.
The embodiment of the invention also provides a control method of the energy storage air conditioning system, which is applied to the energy storage air conditioning system, and comprises the following steps:
Determining a current power distribution control strategy of the energy storage air conditioning system;
And under the current power distribution control strategy, controlling the charge and discharge of the energy storage battery and the operation of the air conditioner according to the charge state of the energy storage battery in the energy storage air conditioning system, the power consumption of the air conditioner and the current power consumption time period.
Optionally, under the current power distribution control policy, controlling charge and discharge of the energy storage battery and operation of the air conditioner according to a state of charge of the energy storage battery in the energy storage air conditioning system, power consumption of the air conditioner and a current power consumption time period, including:
If the current power distribution control strategy is an energy storage economic operation strategy, judging whether the charge state of the energy storage battery meets the discharge requirement;
If the discharge requirement is met, judging whether the electric power of the air conditioner is larger than a distribution power threshold value or not;
and if the power distribution power is larger than the power distribution power threshold, controlling the charge and discharge of the energy storage battery according to the current power utilization time period.
Optionally, controlling charging and discharging of the energy storage battery according to the current power utilization period includes:
if the current electricity utilization time period is a peak time period, controlling the discharge of the energy storage battery to supply the air conditioner;
If the current electricity utilization time period is a valley time period, charging the energy storage battery through a power grid;
and if the current electricity utilization time period is a normal time period, controlling the energy storage battery to be not charged or discharged.
Optionally, the method further comprises controlling the energy storage battery to be not charged or discharged if the electric power of the air conditioner is not greater than the distribution power threshold.
Optionally, the method further comprises:
if the state of charge of the energy storage battery does not meet the discharge requirement, determining the current state of the energy storage battery according to the state of charge of the energy storage battery;
If the energy storage battery is in an overcharged state or at the calibration time, controlling the energy storage battery to be not charged or discharged, and returning to the step of judging whether the charge state of the energy storage battery meets the discharge requirement;
If the energy storage battery is in an overdischarge state, the energy storage battery is forcedly charged until the charge state requirement is met, and the step of judging whether the charge state of the energy storage battery meets the discharge requirement is returned;
and if the energy storage batteries are not in the overcharged state, the calibration time and the overdischarged state, outputting a fault alarm.
Optionally, under the current power distribution control policy, controlling charge and discharge of the energy storage battery and operation of the air conditioner according to a state of charge of the energy storage battery in the energy storage air conditioning system, power consumption of the air conditioner and a current power consumption time period, including:
If the current power distribution control strategy is a power limit operation strategy, judging whether the power consumption of the air conditioner is greater than a power distribution power threshold value or not;
if the power distribution threshold value is larger than the power distribution threshold value, judging whether the charge state of the energy storage battery meets the discharge requirement;
And if the discharging requirement is met, controlling the energy storage battery to discharge so as to supply the air conditioner.
Optionally, the method further comprises reducing the electric power used by the air conditioner if the state of charge of the energy storage battery does not meet the discharge requirement, so that the electric power is smaller than or equal to the distribution power threshold.
Optionally, the method further comprises:
If the power consumption of the air conditioner is not greater than the distribution power threshold, judging whether the state of charge of the energy storage battery is in a full state;
if the current power utilization period is not the full power state, judging whether the current power utilization period is a valley period or not;
if the period is the valley period, charging the energy storage battery through a power grid until the state of charge of the energy storage battery meets the state of charge requirement, and returning to the step of judging whether the electric power of the air conditioner is greater than a distribution power threshold value;
And if the energy storage battery is not in the valley period, waiting for the valley period to charge the energy storage battery.
Optionally, the method further comprises the steps of increasing the power consumption of the air conditioner on the premise that the power distribution power threshold is not exceeded if the state of charge of the energy storage battery is a full state, and returning to judging whether the power consumption of the air conditioner is greater than the power distribution power threshold.
Optionally, under the current power distribution control policy, controlling charge and discharge of the energy storage battery and operation of the air conditioner according to a state of charge of the energy storage battery in the energy storage air conditioning system, power consumption of the air conditioner and a current power consumption time period, including:
If the current power distribution control strategy is a constant power operation strategy, controlling the power consumption of the air conditioner to be constantly operated at preset power, and judging whether the power consumption of the air conditioner is greater than a power distribution power threshold value;
if the power distribution threshold value is larger than the power distribution threshold value, judging whether the charge state of the energy storage battery meets the discharge requirement;
if the discharging requirement is met, controlling the energy storage battery to discharge so as to supply the air conditioner;
and if the power distribution power threshold value is not greater than the power distribution power threshold value, judging whether the state of charge of the energy storage battery is a full state, if the state of charge is the full state, controlling the energy storage battery to be not charged or not discharged, and if the state of charge is not the full state, controlling the energy storage battery to be charged in a valley period.
The embodiment of the invention also provides a control device of the energy storage air conditioning system, which comprises:
The determining module is used for determining the current power distribution control strategy of the energy storage air conditioning system;
And the control module is used for controlling the charge and discharge of the energy storage battery and the operation of the air conditioner according to the charge state of the energy storage battery in the energy storage air conditioning system, the power consumption of the air conditioner and the current power consumption time period under the current power distribution control strategy.
The embodiment of the invention also provides a computer readable storage medium, on which a computer program is stored, which when being executed by a processor, realizes the control method of the energy storage air conditioning system according to the embodiment of the invention.
By applying the technical scheme of the invention, the energy storage is integrated into the air conditioner, the integrated design of the energy storage and the air conditioner is realized, the occupied space is reduced, and the integrated design does not need to independently set heat dissipation for the energy storage battery, and the heat dissipation can be carried out by means of the heat dissipation design of the air conditioner external unit. By utilizing the energy storage battery, the charge and discharge of the energy storage battery and the air conditioner can be controlled according to a power distribution control strategy, only interfaces lower than rated power of the air conditioner are opened for external application, the power distribution capacity and the cable current-carrying capacity of the air conditioner are reduced, the electricity consumption of the air conditioner is reduced, the economy of electricity consumption of the air conditioner is ensured as much as possible, and the electricity consumption of the energy storage air conditioner system is received into low-consumption products.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The embodiment provides an energy storage air conditioning system, which is designed by integrating energy storage and air conditioning, and can be suitable for a direct current micro-grid, an alternating current micro-grid and an alternating current-direct current hybrid micro-grid.
Fig. 1 is a schematic structural diagram of an energy storage air conditioning system according to an embodiment of the present invention, and as shown in fig. 1, the energy storage air conditioning system includes a compressor 11, a first converter 12, an energy storage battery 13, and a second converter 14.
The energy storage battery 13 and the second converter 14 are positioned in the air conditioner external unit, and the energy storage battery 13 is connected to the power grid 15 through the second converter 14;
the compressor 11 is connected to the grid 15 through a first inverter 12;
and the energy storage battery 13 is used for charging and discharging according to the current power distribution control strategy of the energy storage air conditioning system, wherein the energy storage battery discharges to supply power to the air conditioner.
According to the embodiment, the energy storage is integrated into the air conditioner, the integrated design of the energy storage and the air conditioner is realized, the occupied space is reduced, the integrated design is unnecessary to independently set heat dissipation for the energy storage battery, and the heat dissipation can be carried out by means of the heat dissipation design of the air conditioner external unit, for example, a heat dissipation fan on the air source external unit, a water channel system on the water source external unit and the like. By utilizing the energy storage battery, the charge and discharge of the energy storage battery and the air conditioner can be controlled according to a power distribution control strategy, only interfaces lower than rated power of the air conditioner are opened for external application, the power distribution capacity and the cable current-carrying capacity of the air conditioner are reduced, the electricity consumption of the air conditioner is reduced, the economy of electricity consumption of the air conditioner is ensured as much as possible, and the electricity consumption of the energy storage air conditioner system is received into low-consumption products.
The first converter and the second converter are different according to different power grids so as to achieve the purpose of correct conversion. Specifically, if the power grid is a DC micro-grid, the first converter 12 is DC/AC, the second converter 14 is DC/DC, if the power grid is an AC micro-grid, the first converter 12 is AC/AC, the second converter 14 is AC/DC, and if the power grid is an AC/DC hybrid micro-grid, the first converter 12 is DC/AC or AC/AC, and the second converter 14 is DC/DC or AC/DC.
The structure of the energy storage air conditioning system will be specifically described with reference to fig. 2, in which fig. 2 uses a dc micro-grid as an example, and two wires led out from the grid 15 are respectively a positive electrode and a negative electrode. The first converter 12 is DC/AC and the second converter 14 is DC/DC.
The energy storage air conditioning system may further comprise a switch 16, one end of the switch 16 is connected to the output end of the second converter 14, the other end is connected to the energy storage battery 13, and the switch 16 is used for stopping the charge and discharge of the energy storage battery 13 in the case of disconnection. The switch 16 can disconnect the energy storage battery 13 from the second converter 14, so that the charging and discharging of the battery can be stopped or started.
The energy storage air conditioning system may further comprise a soft start circuit 17, an input of the soft start circuit 17 being connected to the power grid 15 and an output of the soft start circuit being connected to an input of the first converter 12 and an input of the second converter 14. The soft start circuit 17 is positioned at the front ends of the energy storage battery and the air conditioner, and can ensure that the capacitor in the energy storage air conditioner system has no short-circuit current impact to the outside during starting. The embodiment of the invention does not limit the specific structure of the soft start circuit, and only needs to realize soft start and avoid short circuit current impact. The structure in fig. 2 is a simple example, and there is no control section exhibiting soft start, and the switch below the resistor is closed, by which current surge at start-up can be avoided. The soft start circuit may be implemented by a device such as a thermistor or a MOS transistor, which is not described in detail in the embodiments of the present invention.
The energy storage air conditioning system may further include a main controller (not shown) connected to the energy storage battery 13, the input terminal of the first converter 12 and the input terminal of the second converter 14, for determining a current power distribution control strategy of the energy storage air conditioning system, and controlling Charge and discharge of the energy storage battery and operation of the air conditioner according to a State of Charge (SOC) of the energy storage battery in the energy storage air conditioning system, an electric power consumption of the air conditioner, and a current electric time period under the current power distribution control strategy. The main controller can be independently arranged outside the energy storage and the air conditioner, and the functions of the main controller can be integrated in the air conditioner control main board, and the air conditioner control main board is used as the main controller. The main controller can realize power supply control of the energy storage air conditioning system, reduce the air conditioning power distribution capacity and the cable current-carrying capacity, reduce the air conditioning power consumption and ensure the air conditioning power consumption economy as much as possible.
The energy storage air conditioning system may further comprise a battery management system 18 connected to the energy storage battery 13 for monitoring the state of the energy storage battery and providing protection for the energy storage battery, the battery management system 18, the first converter 12 and the second converter 14 being devoid of primary communication connections.
In this embodiment, the energy storage and air conditioning integrated design is implemented, the internal communication protocol is set, the communication systems of the first converter 12, the second converter 14 and the battery management system 18 are externally connected without a main connection, and the battery state is monitored through the BMS while the energy response of the energy storage and air conditioning is implemented, so that the communication information integration of the energy storage and air conditioning is implemented. The battery management system 18 is also located inside the air conditioner external unit.
The energy storage air conditioning system may further be provided with an auxiliary power supply 19 connected to the power grid 15, the first converter 12, the second converter 14 and the battery management system 18, respectively, for taking power from the power grid 15 and supplying power to the first converter 12, the second converter 14 and the battery management system 18. The power supply requirement of the auxiliary power supply is weak current, and the auxiliary power supply can be started as soon as the power grid is electrified. The auxiliary power source is used for supplying power to the first converter 12, the second converter 14 and the battery management system 18, normal operation of the device can be guaranteed, and the auxiliary power source is used for taking power from a power grid instead of taking power from a battery side, so that the risk of exceeding the battery during non-use is avoided, and the power-on of control power is completed. The auxiliary power supply 19 is located inside the air conditioner external unit.
Example two
The embodiment provides a control method of an energy storage air conditioning system based on the energy storage air conditioning system described in the first embodiment. Fig. 3 is a flowchart of a control method of an energy storage air conditioning system according to a second embodiment of the present invention, as shown in fig. 3, the method includes the following steps:
s301, determining a current power distribution control strategy of the energy storage air conditioning system.
The power distribution control strategy refers to a strategy for adjusting and controlling a part from power distribution and a part from an energy storage battery in power supply of the energy storage air conditioning system, namely controlling the power supply of the air conditioner through the power distribution and/or the power supply of the air conditioner through the energy storage battery. The power distribution control strategy comprises an energy storage economic operation strategy, a power limit operation strategy and a constant power operation strategy, wherein the factors of electricity consumption economy and power required by the air conditioner to meet the temperature regulation requirement are considered. The energy storage air conditioning system may be configured to automatically select an appropriate power distribution control strategy based on current demand, for example, selecting a power limited operation strategy when the user's cooling or heating demand is relatively low, and for example, selecting an energy storage economy operation strategy in summer of peak electricity consumption, thereby enabling adaptive self-optimizing control of the energy storage air conditioning system. In addition, the user can select the power distribution control strategy meeting the current requirement according to the actual requirement, and the strategy can be replaced at any time later.
S302, under the current power distribution control strategy, the charge and discharge of the energy storage battery and the operation of the air conditioner are controlled according to the charge state of the energy storage battery in the energy storage air conditioning system, the power consumption of the air conditioner and the current power consumption time period.
The state of charge of the energy storage Battery may be obtained by a Battery management system (Battery MANAGEMENT SYSTEM, BMS). The power consumption of the air conditioner can be directly collected and monitored, and the power consumption can be obtained through calculation by collecting parameters such as power consumption voltage and the like. According to the peak-valley characteristics of electricity consumption, the electricity consumption time period can be divided into a peak period, a valley period and a flat period, and the electricity price of the peak period is high. According to the charge state of the energy storage battery in the energy storage air conditioning system, the power consumption of the air conditioner and the current power consumption time period, the charge and discharge of the energy storage battery and the operation of the air conditioner are reasonably controlled, so that the power distribution capacity and the power consumption of the air conditioner are reduced.
According to the embodiment, the energy storage and the air conditioner are integrated, the energy storage battery is utilized, the charge and discharge of the energy storage battery and the operation of the air conditioner are controlled according to the charge state of the energy storage battery in the energy storage air conditioner system, the electric power of the air conditioner and the current electricity utilization time period under the power distribution control strategy, and the power supply control of the air conditioner is realized, so that the power distribution capacity and the cable current-carrying capacity of the air conditioner are reduced, the electricity consumption of the air conditioner is reduced, and the electricity utilization economy of the air conditioner is ensured as much as possible.
Next, a specific control method under each power distribution control policy will be described with respect to S302.
(1) Energy storage economic operation strategy
Referring to fig. 4, when the energy storage air conditioning system is powered on, if the current power distribution control strategy is an energy storage economic operation strategy, judging whether the charge state of the energy storage battery meets the discharge requirement, if so, judging whether the real-time power consumption of the air conditioner is greater than a power distribution power threshold value, and if so, controlling the charge and discharge of the energy storage battery according to the current power consumption time period.
The power distribution threshold is a preset limit value of the power distribution capacity of the energy storage air conditioning system, the limit value can be set according to the interface capacity of the energy storage air conditioning system connected with a power grid, for example, the interface capacity is 5kw, and the power distribution threshold can be set to be 5kw or can be lower than 5kw. The discharging requirement means that the SOC of the energy storage battery reaches a preset value.
Further, the charging and discharging of the energy storage battery are controlled according to the current power utilization time period, wherein the charging and discharging of the energy storage battery are controlled to supply air conditioner if the current power utilization time period is a peak time period, the energy storage battery is charged through a power grid if the current power utilization time period is a valley time period, and the charging and discharging of the energy storage battery are controlled to be not carried out if the current power utilization time period is a normal time period. The mode discharges in peak period, the electric quantity exceeding the power distribution power threshold value is complemented by discharging the energy storage battery, the power consumption of the power grid is reduced in the period with high electricity price, the valley period is charged, the energy storage is carried out with low electricity price, the energy storage economy is realized, and the power consumption is reduced as far as possible.
In practical application, the judging sequence of the time periods may be set, taking fig. 4 as an example, firstly, judging whether the current time is in the peak time period, if yes, executing energy storage discharging, if not, judging whether the current time is in the valley time period, if yes, executing energy storage charging, and if not (indicating that the current time is in the flat time period), controlling the energy storage battery to be not charged or discharged.
And if the electric power of the air conditioner is not greater than the distribution power threshold value, controlling the energy storage battery to be not charged or discharged. The power consumption of the air conditioner is not greater than the power distribution power threshold value, so that the current power distribution can completely meet the power consumption requirement of the air conditioner, an energy storage battery is not required to discharge, the energy storage economy is considered as a main operation, and the energy storage battery is controlled to be not charged or discharged so as to ensure the economy.
If the state of charge of the energy storage battery does not meet the discharge requirement, the current state of the energy storage battery is determined according to the state of charge of the energy storage battery, if the energy storage battery is in an overcharged state or a calibration time, the energy storage battery is controlled to be not charged and not discharged, and the step of judging whether the state of charge of the energy storage battery meets the discharge requirement is returned, preferably, the step of judging whether the state of charge of the energy storage battery meets the discharge requirement can be returned by delaying preset time so as to avoid frequent judgment of occupying system resources, if the energy storage battery is in the overdischarged state, the energy storage battery is forcedly charged until the state of charge requirement is met, and the step of judging whether the state of charge of the energy storage battery meets the discharge requirement is returned, and if the energy storage battery is not in the overcharged state, the calibration time and the overdischarged state, fault alarm is output.
The overcharge means that the electric quantity of the battery reaches 100 percent, but the voltage level exceeds the rated level, and the voltage of the single battery floats up. The calibration time refers to the calibration of the actual capacity of the battery and the recording capacity in the circuit by the process of discharging and recharging after the battery charge reaches 100%. In the embodiment, at the time of overcharging or calibration, the energy storage battery is controlled not to be charged or discharged, and the voltage is waited to fall back after the calibration is completed, so that the discharge requirement is met. In the over-discharge state, the energy storage battery is forcedly charged until the SOC requirement is met, so that the follow-up process is executed, and the energy storage battery can be ensured to be normally used.
According to the energy storage economic operation priority, the charging and discharging of the energy storage battery are controlled according to the battery charge state, the air conditioner electric power and the current electricity utilization time period in sequence, the electricity is discharged in the peak period, the electric power consumption of the power grid is reduced in the period with high electricity price, the valley period is charged, and the energy storage is carried out with low electricity price, so that the energy storage air conditioning system is ensured to use electricity under the set distribution power threshold value relative to the constant limit, the electricity consumption is saved as much as possible, and the economical efficiency is ensured.
(2) Power-limited operation strategy
Referring to fig. 5, when the energy storage air conditioning system is powered on, if the current power distribution control strategy is a power limit operation strategy, judging whether the power consumption of the air conditioner is greater than a power distribution threshold, if so, judging whether the state of charge of the energy storage battery meets the discharge requirement, and if so, controlling the energy storage battery to discharge to supply the air conditioner.
And if the charge state of the energy storage battery does not meet the discharge requirement, reducing the electric power of the air conditioner so that the electric power is smaller than or equal to the distribution power threshold. The electric power of the air conditioner can be reduced by reducing the frequency of the compressor or modifying the set temperature of a user.
If the electric power of the air conditioner is not greater than the distribution power threshold, judging whether the state of charge of the energy storage battery is in a full state, if the state of charge is not in the full state, judging whether the current electricity utilization period is a valley period, if the current electricity utilization period is the valley period, charging the energy storage battery through a power grid until the state of charge of the energy storage battery meets the state of charge requirement, returning to the step of judging whether the electric power of the air conditioner is greater than the distribution power threshold, and if the state of charge is not in the valley period, waiting for the valley period to charge the energy storage battery.
If the state of charge of the energy storage battery is a full state, on the premise that the power distribution power threshold is not exceeded, the power consumption of the air conditioner is increased, and the step of judging whether the power consumption of the air conditioner is larger than the power distribution power threshold is returned.
The embodiment takes the power limiting of the energy storage air conditioning system as the primary aim, and then meets the energy storage economic operation. And judging and controlling the discharge of the energy storage according to the electric power for the air conditioner and the charge state of the battery in sequence, and reducing the direct electricity taking of the air conditioner from a power grid by utilizing the discharge of the energy storage battery so as to ensure that the energy storage air conditioning system operates below a distribution power threshold. And the charging of the energy storage battery is controlled according to the current electricity utilization time period, the energy storage battery is charged in the valley time period, and the energy storage is carried out with low electricity price, so that the electricity consumption is saved.
(3) Constant power operation strategy
Referring to fig. 6, when the energy storage air conditioning system is powered on, if the current power distribution control strategy is a constant power operation strategy, controlling the power consumption of the air conditioner to be constantly operated at a preset power, and judging whether the power consumption of the air conditioner is greater than a power distribution power threshold value;
if the power consumption is greater than the distribution power threshold, judging whether the state of charge of the energy storage battery meets the discharge requirement, if so, controlling the energy storage battery to discharge to supply air conditioner, and if not, considering the power reduction operation, for example, reducing the power consumption to be equal to or lower than the distribution power threshold by reducing the frequency of the compressor or modifying the temperature set by a user.
And if the state of charge of the energy storage battery is not greater than the distribution power threshold, judging whether the state of charge of the energy storage battery is in a full state, if the state of charge is in the full state, controlling the energy storage battery to be not charged or not discharged, and if the state of charge is not in the full state, controlling the energy storage battery to be charged in a valley period.
The implementation mode is mainly operated under constant power of the energy storage air conditioning system, and then the energy storage economic operation is satisfied. The energy storage air conditioning system operates according to fixed preset power, if the distribution power threshold value does not reach the preset power, the energy storage battery is utilized to complement the differential power, and under the condition that the distribution power threshold value is larger than or equal to the preset power and is in a valley period, the non-full-electricity energy storage battery is charged, so that the energy saving charging of the energy storage battery is ensured while the operation of the air conditioner is optimized.
Example III
Based on the same inventive concept as the control method of the energy storage air conditioning system described in the second embodiment, the present embodiment provides a control device of the energy storage air conditioning system, which may be used to implement the control method of the energy storage air conditioning system described in the foregoing embodiment. The device may be implemented by software and/or hardware, and the device may be generally integrated in a main controller, for example, a main controller separately provided outside the air conditioner control main board, or the function may be integrated in the air conditioner control main board.
Fig. 7 is a block diagram of a control device of an energy storage air conditioning system according to a third embodiment of the present invention, as shown in fig. 7, the device includes:
A determining module 71, configured to determine a current power distribution control strategy of the energy storage air conditioning system;
The control module 72 is configured to control the charge and discharge of the energy storage battery and the operation of the air conditioner according to the state of charge of the energy storage battery in the energy storage air conditioning system, the power consumption of the air conditioner, and the current power consumption time period under the current power distribution control strategy.
Optionally, the control module 72 includes a first control unit, configured to determine whether a state of charge of the energy storage battery meets a discharge requirement if the current power distribution control policy is an energy storage economic operation policy, determine whether power consumption of the air conditioner is greater than a power distribution threshold if the discharge requirement is met, and control charging and discharging of the energy storage battery according to a current power consumption time period if the power consumption is greater than the power distribution threshold.
Further, the first control unit is specifically configured to control the energy storage battery to discharge to supply air conditioner if the current power utilization time period is a peak period, charge the energy storage battery through the power grid if the current power utilization time period is a valley period, and control the energy storage battery to not charge or discharge if the current power utilization time period is a normal period.
Further, the first control unit is further used for controlling the energy storage battery to be not charged or discharged if the electric power of the air conditioner is not greater than the distribution power threshold value.
Further, the first control unit is further configured to determine a current state of the energy storage battery according to the state of charge of the energy storage battery if the state of charge of the energy storage battery does not meet the discharge requirement, control the energy storage battery not to charge or discharge if the energy storage battery is in an overcharged state or a calibration time, and return to a step of judging whether the state of charge of the energy storage battery meets the discharge requirement, forcedly charge the energy storage battery until the state of charge requirement is met if the energy storage battery is in the overdischarged state, and return to a step of judging whether the state of charge of the energy storage battery meets the discharge requirement, and output a fault alarm if the energy storage battery is not in the overcharged state, the calibration time and the overdischarged state.
Optionally, the control module 72 includes a second control unit, configured to determine whether the power consumption of the air conditioner is greater than a power distribution threshold when the current power distribution control policy is a power limit operation policy, determine whether the state of charge of the energy storage battery meets a discharge requirement if the power consumption is greater than the power distribution threshold, and control the energy storage battery to discharge to supply the air conditioner if the discharge requirement is met.
Further, the second control unit is further used for reducing the electric power used by the air conditioner if the state of charge of the energy storage battery does not meet the discharge requirement, so that the electric power is smaller than or equal to the distribution power threshold.
Further, the second control unit is further configured to determine whether the state of charge of the energy storage battery is a full state if the power consumption of the air conditioner is not greater than the distribution power threshold, determine whether the current power consumption period is a valley period if the state of charge is not the full state, charge the energy storage battery through the power grid if the current power consumption period is the valley period until the state of charge of the energy storage battery meets the state of charge requirement, and return to the step of determining whether the power consumption of the air conditioner is greater than the distribution power threshold, and wait for the valley period to charge the energy storage battery if the state of charge of the energy storage battery is not the valley period.
Further, the second control unit is further configured to increase the power consumption of the air conditioner on the premise that the power distribution threshold is not exceeded if the state of charge of the energy storage battery is a full state, and return to the step of determining whether the power consumption of the air conditioner is greater than the power distribution threshold.
Optionally, the control module 72 includes a third control unit, configured to control the power consumption of the air conditioner to be constantly operated at a preset power under the condition that the current power distribution control policy is a constant power operation policy, determine whether the power consumption of the air conditioner is greater than a power distribution threshold, determine whether the state of charge of the energy storage battery meets a discharge requirement if the power consumption is greater than the power distribution threshold, control the energy storage battery to discharge to supply the air conditioner if the state of charge of the energy storage battery meets the discharge requirement, and determine whether the state of charge of the energy storage battery is a full state if the state of charge is not greater than the power distribution threshold, and control the energy storage battery to be not charged or not discharged if the state of charge is not the full state, and control the energy storage battery to be charged in a valley period if the state of charge is not the full state.
The device can execute the method provided by the embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method. Technical details not described in detail in this embodiment may be referred to the method provided in the embodiment of the present invention.
The present embodiment also provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements a control method of an energy storage air conditioning system according to the second embodiment of the present invention.
In summary, the energy storage air conditioning system, the control method and the control device thereof integrate energy storage and air conditioning, integrate electrical connection and communication information, and can avoid the problems of large source-load flow fluctuation, large air conditioning power distribution capacity and large cable current capacity caused by severe power change of an air conditioning load and the uneconomic problem of maximum air conditioning power consumption when the power consumption price is at a peak value through the energy storage battery and the corresponding control method.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is illustrated in the flowcharts, in some cases the steps illustrated or described may be performed in an order other than that illustrated herein.
It should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present invention, and not for limiting the same, and although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the technical solution described in the above-mentioned embodiments may be modified or some technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiments of the present invention.