CN102148514A - Generation control system utilizing copper indium gallium selenide (CIGS) thin-film solar photovoltaic glass plate - Google Patents

Abstract

The invention relates to a generation control system utilizing a copper indium gallium selenide (CIGS) thin-film solar photovoltaic glass plate, belonging to the technical field of photovoltaic control. The generation control system utilizing the CIGS thin-film solar photovoltaic glass plate is characterized by comprising a central controller unit (2) connected with the CIGS thin-film solar photovoltaic glass plate (1), a battery charge and discharge control unit (3) controlled by and connected with the central controller unit (2), and an alternating current (AC) /direct current (DC) switch unit (4) connected with the battery charge and discharge control unit (3), wherein the AC/DC switch unit (4) is finally connected with electric loads. The control system disclosed by the invention has the advantages of high integrity, simple peripheral circuit, high reliability, low production cost, less environment pollution and high photovoltaic conversion rate, thereby having wide application prospects.

Description

Utilize CIGS thin-film solar photovoltaic glass plate power-generating control system

Technical field

The present invention relates to a kind of CIGS thin-film solar photovoltaic glass plate power-generating control system that utilizes, belong to opto-electronic conversion and electric and electronic technical field.

Background technology

CIGS thin-film solar photovoltaic material cost is low, and the manufacture process environmental pollution is little, has wide development space in field of photovoltaic power generation.Do not have the control system of utilizing the generating of CIGS thin-film solar photovoltaic glass plate in the prior art as yet.

Summary of the invention

The object of the present invention is to provide a kind of rational in infrastructure, high-efficient energy-saving environment friendly, production cost low, environmental pollution is little, and photoelectric conversion rate is high utilizes CIGS thin-film solar photovoltaic glass plate power-generating control system.

The present invention is achieved by the following technical solutions:

Utilize CIGS thin-film solar photovoltaic glass plate power-generating control system, its special character is to comprise the central controller unit 2 that is connected with CIGS thin-film solar photovoltaic glass plate 1, accumulator cell charging and discharging control unit 3 by central controller unit 2 control connections, and the alternating current-direct current switch unit 4 that is connected with accumulator cell charging and discharging control unit 3, finally with electric loading link to each other by alternating current-direct current switch unit 4.

Described central controller unit 2 comprises inner set charge-discharge control system 2-1, battery protection system 2-2 and the 2-3 of maximal power tracing system,

Described accumulator cell charging and discharging control unit 3 comprises batteries 3-1, the end of batteries 3-1 is connected with CIGS thin-film solar photovoltaic glass plate 1 by DC/DC converter 3-2, the other end is connected with batteries 3-1 by UI testing circuit and charge-discharge circuit respectively by the battery protection system 2-2 and the charge-discharge control system 2-1 of central controller unit 2, and the 2-3 of maximal power tracing system of central controller unit 2 is communicated with DC/DC converter 3-2 by the PWM controller simultaneously;

Described alternating current-direct current switch unit 4 comprises simultaneously DC/AC transducer 4-1, the DC/DC transducer 4-2 that is connected with central controller unit 2 and AC load, DC load; When accumulator electric-quantity is not enough to keep the load operate as normal; the storage battery power supply that central controller unit 2 cuts off load is protected storage battery, and AC load is switched to the civil power Alternating Current Power Supply; after storage battery returns to normal charging condition, cut off civil power and be converted to storage battery power supply.

A kind of Circuits System of utilizing CIGS thin-film solar photovoltaic glass plate to obtain household electricity of the present invention, it is low to have a production cost, and environmental pollution is little, and the advantage that photoelectric conversion rate is high is with a wide range of applications.

Description of drawings

Fig. 1: a kind of circuit system structure schematic diagram that utilizes CIGS thin-film solar photovoltaic glass plate to obtain household electricity of the present invention;

Fig. 2: accumulator cell charging and discharging control unit structural representation;

Fig. 3: alternating current-direct current switch unit structural representation;

Embodiment

Provide the specific embodiment of the present invention below in conjunction with accompanying drawing, be used for that the present invention is further illustrated.

Utilize CIGS thin-film solar photovoltaic glass plate power-generating control system, comprise the central controller unit 2 that is connected with CIGS thin-film solar photovoltaic glass plate 1, accumulator cell charging and discharging control unit 3 by central controller unit 2 control connections, and the alternating current-direct current switch unit 4 that is connected with accumulator cell charging and discharging control unit 3, finally with electric loading link to each other by alternating current-direct current switch unit 4.Described central controller unit 2 comprises inner set charge-discharge control system 2-1, battery protection system 2-2 and the 2-3 of maximal power tracing system; Described accumulator cell charging and discharging control unit 3 comprises batteries 3-1, the end of batteries 3-1 is connected with CIGS thin-film solar photovoltaic glass plate 1 by DC/DC converter 3-2, the other end is connected with batteries 3-1 by UI testing circuit and charge-discharge circuit respectively by the battery protection system 2-2 and the charge-discharge control system 2-1 of central controller unit 2, and the 2-3 of maximal power tracing system of central controller unit 2 is communicated with DC/DC converter 3-2 by the PWM controller simultaneously; Described alternating current-direct current switch unit 4 comprises simultaneously DC/AC transducer 4-1, the DC/DC transducer 4-2 that is connected with central controller unit 2 and AC load, DC load;

Under different temperature and light radiation intensity, the maximum power point MPP (maximum power point) of CIGS thin-film solar photovoltaic glass template output is different, under certain temperature and radiation intensity, its MPP is unique, this programme adopts DC-DC converter by central controller controls as the interface circuit between photovoltaic glass template and the storage battery, and the one, realize MPPT (maximum power point tracking) MPPT maximum power point tracking; The 2nd, realize optimum charging control to storage battery; The 3rd, storage battery is effectively protected.

The DC-DC basic circuit

Because copper-indium-gallium-selenium photovoltaic template output voltage fluctuation is bigger, the Cuk circuit has simultaneously and boosts and buck functionality, and the Cuk circuit is used for voltage controller, can realize the MPPT algorithm controls in big voltage range.By the needs output control signal of central controller according to MPPT, the shutoff of control thyristor realizes PWM (pulse width modulation) control.

The MPPT MPPT maximum power point tracking.

This programme adopts " power disturbance method " to implement MPPT maximum power point tracking.Promptly measure the output voltage and the electric current of current photovoltaic module earlier, calculate power.On the basis of former output voltage, increase a small voltage component (or claiming disturbance) then, by photovoltaic module I-U characteristic as can be known its power output can change, calculate the power after changing, relatively preceding with change, increasing then as power, continuation increases former disturbance, change former perturbation direction if power diminishes, realize MPPT control with this.Software realizes being realized by central controller that control is realized by changing duty ratio by PWM by the given signal of central controller.

Optimum charging control of storage battery and protection.

The charge in batteries strategy that this programme adopts is, when beginning to charge, set a maximum charging current that allows earlier, C/10 (C is a battery capacity), constantly detect battery current then, as long as charging current is no more than the maximum charging current that allows, constantly detect battery tension simultaneously in this, when voltage reaches rated voltage, the state of overcharging that enters is described, change the maximum charging current that allows this moment, change C/20 into, and repeat above process, until charging current reaches C/100, illustrate that storage battery has reached 100% charged state.This method utilizes the MPPT algorithm to make photovoltaic module to the storage battery Maximum Power Output under the prerequisite that is no more than maximum permission charging current, has improved the utilance of photovoltaic module.

Reach and overcharge or over-discharge state when the UI testing circuit detects storage battery, promptly disconnect charging process or load, storage battery is protected.

The alternating current-direct current switch unit

When accumulator electric-quantity was not enough to keep the load operate as normal, promptly storage battery was in and owes to fill state, and central controller cuts off the storage battery power supply of load, and storage battery is carried out guard mode.And AC load switched to civil power 220V/50Hz Alternating Current Power Supply.After storage battery is returned to normal charging condition, cuts off civil power and be converted to storage battery power supply.For preventing island effect, this part is reduced to and adopts the full deenergizing of standard-sized sheet, and the delay certain hour prevents the impact of surge phenomenon to load.

Central controller is selected for use with the programming of monolithic parts and is realized.

For DC load, can directly power to the load by storage battery.Require the load of voltage request for difference, still adopt the Cuk chopper circuit, boost or decompression transformation by the adjusting of duty ratio, to adapt to the unequally loaded needs.For after exchanging electricity consumption and can adopting the conversion of DC-AC inverter, provide the interchange electricity consumption of 220V/50Hz to AC load.

The CIGS thin-film solar photovoltaic glass plate that utilizes of this example obtains the Circuits System of household electricity, has the integrated level height, and peripheral circuit is simple, the reliability height, and production cost is low, and environmental pollution is little, and the advantage that photoelectric conversion rate is high is with a wide range of applications.

Claims (4)

1. utilize CIGS thin-film solar photovoltaic glass plate power-generating control system, it is characterized in that comprising the central controller unit (2) that is connected with CIGS thin-film solar photovoltaic glass plate (1), accumulator cell charging and discharging control unit (3) by central controller unit (2) control connection, and the alternating current-direct current switch unit (4) that is connected with accumulator cell charging and discharging control unit (3), finally with electric loading link to each other by alternating current-direct current switch unit (4).

2. according to the described CIGS thin-film solar photovoltaic glass plate power-generating control system that utilizes of claim 1, it is characterized in that described central controller unit (2) comprises inner set charge-discharge control system (2-1), battery protection system (2-2) and maximal power tracing system (2-3).

3. according to the described CIGS thin-film solar photovoltaic glass plate power-generating control system that utilizes of claim 1; it is characterized in that described accumulator cell charging and discharging control unit (3) comprises batteries (3-1); one end of batteries (3-1) is connected with CIGS thin-film solar photovoltaic glass plate (1) by DC/DC converter (3-2); the other end is connected with batteries (3-1) by UI testing circuit and charge-discharge circuit respectively by the battery protection system (2-2) and the charge-discharge control system (2-1) of central controller unit (2), and the maximal power tracing system (2-3) of central controller unit (2) is communicated with DC/DC converter (3-2) by the PWM controller simultaneously.

4. according to the described CIGS thin-film solar photovoltaic glass plate power-generating control system that utilizes of claim 1, it is characterized in that described alternating current-direct current switch unit (4) comprises DC/AC transducer (4-1), the DC/DC transducer (4-2) that is connected with central controller unit (2) and AC load, DC load simultaneously.

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