Disclosure of utility model
The utility model mainly aims to provide a photovoltaic remote control device based on an edge computing gateway, and aims to solve the technical problems of ensuring low cost, protocol integration and simple equipment access and realizing intelligent remote control of photovoltaic operation and maintenance.
In order to achieve the above purpose, the utility model provides a photovoltaic remote control device based on an edge computing gateway, which comprises a photovoltaic operation and maintenance system, the edge computing gateway, a photovoltaic inverter, a network IO device and a contactor;
The photovoltaic operation and maintenance system is in communication connection with the edge computing gateway, the edge computing gateway is respectively in communication connection with the photovoltaic inverter and the network IO equipment, and the network IO equipment is electrically connected with the contactor;
The photovoltaic power station comprises an edge computing gateway, a photovoltaic operation and maintenance system, a network IO device and a network IO device, wherein the edge computing gateway is used for sending photovoltaic data of the photovoltaic inverter to the photovoltaic operation and maintenance system, the photovoltaic operation and maintenance system is used for sending a contactor control instruction to the network IO device through the edge computing gateway according to the photovoltaic data, and the network IO device is used for controlling contact switches of the contactor according to the contactor control instruction so as to realize remote control of a three-phase loop state of the photovoltaic power station.
Optionally, the network IO device includes a first relay and a second relay, and the contactor includes a contactor coil;
The first relay is used for controlling the contactor coil to be powered off, and the second relay is used for controlling the contactor coil to be powered on.
Optionally, the contactor further comprises a contactor normally open contact and a contactor main contact;
The contactor normally open contact is connected in parallel to the second relay, and the contactor main contact is arranged on a three-phase loop of the photovoltaic power station.
Optionally, the photovoltaic operation and maintenance system is configured to send a parameter adjustment instruction to the photovoltaic inverter through the edge computing gateway according to the photovoltaic data, so that the photovoltaic inverter adjusts inverter parameters according to the parameter adjustment instruction.
Optionally, the contactor control command includes a contactor off command;
The network IO equipment is used for opening the normally closed contact of the first relay according to the contactor turn-off instruction so as to enable the coil of the contactor to be powered off, opening the normally open contact of the contactor and the main contact of the contactor, and closing the normally closed contact of the first relay after a preset time length so as to realize the remote control of the three-phase loop opening of the photovoltaic power station.
Optionally, the contactor control instructions further comprise contactor close instructions;
The network IO equipment is used for closing the normally open contact of the second relay according to the contactor closing instruction so as to electrify the coil of the contactor, closing the normally open contact of the contactor and the main contact of the contactor, and opening the normally open contact of the second relay within a preset duration range so as to realize the three-phase loop closing of the remote control photovoltaic power station.
Optionally, the photovoltaic operation and maintenance system and the edge computing gateway establish communication connection through a preset communication protocol interface, and the edge computing gateway respectively establishes communication connection with the photovoltaic inverter and the network IO device through the preset communication protocol interface.
According to the photovoltaic power station three-phase loop state control method, a photovoltaic operation and maintenance system is in communication connection with an edge computing gateway, the edge computing gateway is respectively in communication connection with a photovoltaic inverter and a network IO device, the network IO device is electrically connected with a contactor, firstly the edge computing gateway is used for sending photovoltaic data of the photovoltaic inverter to the photovoltaic operation and maintenance system, then the photovoltaic operation and maintenance system is used for sending a contactor control instruction to the network IO device through the edge computing gateway according to the photovoltaic data, and then the network IO device is used for controlling contact switches of the contactor according to the contactor control instruction so as to realize the three-phase loop state of a remote control photovoltaic power station. In the prior art, based on the software provided by each photovoltaic manufacturer, the data of each photovoltaic device can not be received, and the inverter and the peripheral devices can not be controlled remotely, but the utility model combines the characteristics of an edge computing gateway, network IO devices and field traditional devices and the electrical control theory, different switching sequences of a plurality of relays of the network IO equipment are set so as to achieve the aim of remotely closing and closing a main loop of the photovoltaic system, avoid equipment replacement and reduce transformation cost.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
The embodiment of the utility model provides a photovoltaic remote control device based on an edge computing gateway, and referring to fig. 1, fig. 1 is a schematic flow chart of a first embodiment of the photovoltaic remote control device based on the edge computing gateway.
In specific implementation, the utility model is applied to operation and maintenance projects of the distributed photovoltaic power stations, the distributed photovoltaic power stations are distributed in remote villages of the local whole city, the number of the brands of the inverters is large, the operation states of the checking and power generation data and the adjusting equipment depend on site checking and operation of operation and maintenance personnel, and the operation and maintenance cost is extremely high.
In this embodiment, the photovoltaic remote control device based on the edge computing gateway includes a photovoltaic operation and maintenance system 1001, an edge computing gateway 1002, a photovoltaic inverter 1003, a network IO device 1004 and a contactor 1005, wherein the photovoltaic operation and maintenance system 1001 is in communication connection with the edge computing gateway 1002, the edge computing gateway 1002 is in communication connection with the photovoltaic inverter 1003 and the network IO device 1004 respectively, and the network IO device 1004 is electrically connected with the contactor 1005.
In a specific implementation, the equipment model of the edge computing gateway in the operation and maintenance project of the distributed photovoltaic power station is DTU-DP600R, the equipment model of the network IO equipment is ZS-DIO-R-10A, the equipment model of the contactor is CJ20-63, and the equipment model of the photovoltaic inverter is GW60KS-MT.
It should be understood that the edge computing gateway, network IO devices, contactors, and photovoltaic inverters may be replaced with devices having the same function corresponding to different models.
The photovoltaic operation and maintenance system and the edge computing gateway are in communication connection through a preset communication protocol interface, and the edge computing gateway is in communication connection with the photovoltaic inverter and the network IO equipment through the preset communication protocol interface respectively.
The preset communication protocol interface can be a Modbus RS485 interface and can also be other communication protocol interfaces.
In this embodiment, referring to fig. 2, fig. 2 is a schematic diagram showing connection between an edge computing gateway and a network IO module in a first embodiment of a photovoltaic remote control device based on an edge computing gateway, a photovoltaic operation and maintenance system communicates with the edge computing gateway through a 4G network, the edge computing gateway is connected with a Modbus RS485 interface of a photovoltaic inverter through a Modbus RS485 interface of the edge computing gateway, a network IO device is connected with a Modbus RS485 interface of the edge computing gateway through a Modbus RS485 interface of the edge computing gateway, and a unified transmission protocol of the edge computing gateway is used to implement efficient data management, and a contactor is connected with a relay interface of the network IO device through an auxiliary contact of the edge computing gateway.
Referring to fig. 3, fig. 3 is a schematic diagram of a contactor control circuit of a first embodiment of a photovoltaic remote control device based on an edge computing gateway according to the present utility model, in which a network IO device includes a first relay (i.e., relay No. 1) and a second relay (i.e., relay No. 2), the contactor includes a contactor coil, the first relay, the second relay, and the contactor coil are connected in series, the first relay is used for controlling the contactor coil to be powered off, the second relay is used for controlling the contactor coil to be powered on, the contactor further includes a contactor normally open contact and a contactor main contact, the second relay is connected in parallel with the contactor normally open contact, the contactor main contact is disposed on a three-phase loop of a photovoltaic power station, and the three-phase loop is connected with a photovoltaic inverter.
The edge computing gateway 1002 is used for sending photovoltaic data of the photovoltaic inverter 1003 to the photovoltaic operation and maintenance system 1001, the photovoltaic operation and maintenance system 1001 is used for sending a contactor control instruction to the network IO equipment 1004 through the edge computing gateway 1002 according to the photovoltaic data, and the network IO equipment 1004 is used for controlling contact switches of the contactor 1005 according to the contactor control instruction so as to realize remote control of a three-phase loop state of a photovoltaic power station.
The photovoltaic operation and maintenance system is used for sending a parameter adjustment instruction to the photovoltaic inverter through the edge computing gateway according to the photovoltaic data so that the photovoltaic inverter adjusts inverter parameters according to the parameter adjustment instruction.
It should be understood that the edge computing gateway realizes data communication with the central server of the photovoltaic operation and maintenance system through the 4G communication network, and all the collected data are sent to the central server of the operation and maintenance system in the form of an MQTT protocol. The edge computing gateway is combined with the photovoltaic inverter, photovoltaic data of the photovoltaic inverter are received remotely, inverter parameters are adjusted remotely, and therefore operation, maintenance, cost reduction and efficiency improvement are achieved.
Because each photovoltaic power station is provided with the edge computing gateway on site, the integration of the data of the integrated multi-brand inverter into a unified platform is realized, all the data of the inverter can be actively inquired and reported, meanwhile, the two-way data communication is realized with the inverter, the inverter data can be actively collected, the control instruction of the operation and maintenance platform can be executed, the operation pressure of a central server is effectively reduced, after the operation and maintenance platform sends the control instruction such as an inverter switch or an adjustment parameter to the edge computing gateway, the edge computing gateway sends the corresponding control instruction (namely a switch instruction or a parameter adjustment instruction) to the inverter through the Modbus RS485 interface of the edge computing gateway, and after the inverter receives the control instruction, the inverter can execute the actions such as the related switch and the adjustment parameter according to the control instruction, thereby realizing the goal of remotely scheduling the photovoltaic power generation.
It is understood that by means of the combined low-cost remote control photovoltaic system of the edge computing gateway, the network IO equipment and the contactor, the principle of a three-phase motor start-stop control circuit and the characteristics of the network IO relays are applied, every two network IO relays are in a group, the normally closed contact of the network IO relay is used as a normally closed switch of the control circuit, and the normally open contact of the network IO is used as a normally open switch. Through combining the electrical characteristics of edge computing gateway, network IO module and traditional contactor, through control algorithm and simple circuit wiring, reform transform distributed photovoltaic power plant with lower cost, realize remote control, adjust photovoltaic power plant's operational mode, solved the demand of the long-range fortune dimension of traditional distributed photovoltaic power plant.
Further, the contactor control instruction comprises a contactor turn-off instruction, and the network IO device is used for switching off a normally-closed contact of the first relay according to the contactor turn-off instruction so as to enable a coil of the contactor to be powered off, switching off a normally-open contact of the contactor and a main contact of the contactor, and switching on the normally-closed contact of the first relay after a preset time length so as to realize the three-phase loop turn-off of the remote control photovoltaic power station.
The preset duration can be user-defined, can be 3 seconds, can be 2 seconds and the like.
In a specific implementation, after the operation and maintenance platform sends a contactor turn-off instruction to the edge computing gateway, the edge computing gateway sends the control instruction to the network IO device through a Modbus RS485 interface of the edge computing gateway, a normally closed contact of a No. 1 relay of the network IO device is disconnected, a contactor coil is powered off, and a normally open contact of the contactor is disconnected. The contacts of the three-phase main circuit are opened according to the characteristics of the contactor. Thereby achieving the goal of disconnecting the main loop. To ensure that the control operation is repeatable, the system will return to the normally closed state for 3 seconds after the closing command is issued.
The network IO equipment is used for closing a normally open contact of the second relay according to the contactor closing instruction so as to electrify a coil of the contactor, closing the normally open contact of the contactor and a main contact of the contactor, and opening the normally open contact of the second relay within a preset duration range so as to realize the closing of a three-phase loop of the remote control photovoltaic power station.
In this embodiment, after the operation and maintenance platform sends a contactor closing instruction to the edge computing gateway, the edge computing gateway sends the control instruction to the network IO device through its own Modbus RS485 interface, the normally open contact of the No. 2 relay of the network IO device is closed, the contactor coil is energized, the normally open contact of the contactor is closed, and according to the characteristics of the contactor, the contacts of the three-phase main loop are closed, thereby achieving the goal of closing the main loop. In order to ensure that the control operation can be repeated, the system can recover to the normally open state after sending a closing instruction for 3 seconds.
According to the photovoltaic power station three-phase loop state control method, a photovoltaic operation and maintenance system is in communication connection with an edge computing gateway, the edge computing gateway is respectively in communication connection with a photovoltaic inverter and a network IO device, the network IO device is electrically connected with a contactor, firstly the edge computing gateway is used for sending photovoltaic data of the photovoltaic inverter to the photovoltaic operation and maintenance system, then the photovoltaic operation and maintenance system is used for sending a contactor control instruction to the network IO device through the edge computing gateway according to the photovoltaic data, and then the network IO device is used for controlling contact switches of the contactor according to the contactor control instruction so as to realize the three-phase loop state of a remote control photovoltaic power station. In the prior art, the data of the respective photovoltaic equipment is received based on software provided by each photovoltaic manufacturer, and the inverter and the peripheral equipment cannot be controlled remotely, and the integration of the data of the integrated multi-brand inverter into a unified platform is realized by applying the edge computing gateway, the aim of remote photovoltaic operation and maintenance is realized based on a 4G communication technology, and meanwhile, the bidirectional data communication is realized with the inverter, so that the inverter data can be actively collected, the control instruction of the operation and maintenance platform can be executed, and the parameters of the photovoltaic inverter can be adjusted remotely.
The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the utility model, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.