CN108111115A - The maintenance device and method of a kind of photovoltaic generation - Google Patents

Abstract

The invention relates to a maintenance device and method for photovoltaic power generation. The device at least includes: a photovoltaic panel array, a controller and a cleaner, the controller is electrically connected to the photovoltaic panel array, the controller is electrically connected to a cleaner, and the controller It is also electrically connected to a host computer; the photovoltaic panel unit in the detection photovoltaic panel array is provided with a solar photovoltaic panel state detection circuit. The invention solves the problem of finding the position of the photovoltaic power generation unit in time and maintaining it when the solar energy system is unbalanced due to various factors, so that the photovoltaic power generation works at the best efficiency.

Description

A maintenance device and method for photovoltaic power generation

technical field

The invention relates to a solar power generation technology, in particular to a photovoltaic power generation maintenance device and method.

Background technique

With the shortage of energy and the pollution of the environment, more and more people pay attention to solar energy as a pollution-free and pollution-free green energy, and the application of solar photovoltaic power generation is also becoming more and more extensive. With the development of renewable energy, the application of solar photovoltaic power generation has attracted more and more attention, and the field of solar photovoltaic power generation has also become a hot research field. However, the current existing solar photovoltaic power generation system architecture is most susceptible to the impact of the actual working environment and site conditions, resulting in an imbalance within the solar system. For example, if a big tree is planted next to the house, various debris such as shade, fallen leaves, bark, etc., fast-moving clouds in the sky, and debris such as bird droppings and insects that fall from time to time will block the sunlight from reaching the solar energy. The strength of the plate, and will gradually reduce the total power generation of the photovoltaic system. For solar photovoltaic power generation systems, as long as a few panels are shaded or covered by debris such as leaves, the power generation of the entire system will drop significantly. Specifically, as long as 10% of the photovoltaic module area is covered, the total power generation of the system will drop by 50%. In addition, although a newly installed solar photovoltaic system will not have the problem of panel mismatch, as time goes by, the panels will continue to age, and the aging rate will vary, and the solar system will inevitably have an imbalance.

For the above problems, the following methods are usually adopted:

(1) Photovoltaic modules are shaded or the electrical parameters are inconsistent, resulting in a decrease in the output power of the photovoltaic modules. When the output current of the photovoltaic modules is lower than the output current of the branch string where the photovoltaic modules are located, the solar optimization circuit will operate the photovoltaic modules in step-down current expansion model;

(2) If the photovoltaic modules in the branch string are shaded and the output power of the system becomes smaller, the output current of the unshaded photovoltaic modules in the branch string will be greater than the output current of the photovoltaic module string, and the solar energy optimization circuit Work the photovoltaic module in boost mode;

(3) If the photovoltaic modules are all working at the maximum power point, and the output current of the photovoltaic modules is approximately equal to the output current of the branch string of the photovoltaic modules, the solar optimization circuit will work the photovoltaic modules in the straight-through state;

(4) There are bypass diodes inside or in parallel in the solar optimization circuit. When the photovoltaic module is abnormal, the solar optimization circuit directly bypasses the current through the bypass diode to make the entire photovoltaic power generation system work normally.

The above solutions can only be used in a short period of time, and maintenance and solutions must be carried out for a long time to keep the photovoltaic power generation in the best power state.

Contents of the invention

The purpose of the present invention is to provide a maintenance device and method for photovoltaic power generation, in order to solve the imbalance in the solar system due to various factors, find the position of the photovoltaic power generation unit in time and maintain it, so that the photovoltaic power generation can work at the best efficiency .

The object of the present invention is achieved in this way, a maintenance device for photovoltaic power generation, characterized in that it at least includes: a photovoltaic panel array, a controller and a cleaner, the controller is electrically connected to the photovoltaic panel array, and the controller is electrically connected to A washer, the controller is also electrically connected to a host computer; the photovoltaic panel unit in the detection photovoltaic panel array is provided with a solar photovoltaic panel state detection circuit.

The cleaner includes a high-pressure water head, a cloud platform, and a high-pressure water pump. The high-pressure water head is fixed on the cloud platform, the high-pressure water pump is connected to the interface of the high-pressure water head, and the motor of the cloud platform is electrically connected to the controller.

The cloud platform is fixed on the top of the photovoltaic panel array.

The solar photovoltaic panel state detection circuit includes: a DC-AC converter, a voltage and current detection sensing unit, a processing circuit, a communication interface and a position positioning unit, the photovoltaic panel array output terminal and the DC-AC converter and voltage and current The input end of the detection sensing unit is electrically connected; the output end of the voltage and current detection sensing unit is electrically connected to the interface of the processing circuit, and the processing circuit is electrically connected to the DC-AC converter, the communication interface and the position positioning unit through the control port, and the voltage and current are electrically connected to each other. The current detection sensing unit provides the voltage and current output signals of the photovoltaic panel array to the processing circuit; the processing circuit processes the voltage and current signals, and at the same time obtains the voltage and current signals of the photovoltaic modules under the same conditions through the communication interface; The state of the board unit, the processing circuit is electrically connected to the controller through the interface. When there is a shade, the controller controls the cleaner to clean the position with the shade. When there is no shade, the controller outputs to the host computer. Send the specific location or code of the photovoltaic panel unit in the photovoltaic panel array.

A solar shade photovoltaic cleaning method for photovoltaic power generation, characterized by: at least including: a photovoltaic panel array, a controller and a cleaner, the controller is electrically connected to the photovoltaic panel array, the controller is electrically connected to a cleaner, and controls The controller is also electrically connected to the host computer; the controller is used to detect the power of the photovoltaic panel units in the photovoltaic panel array. When the threshold is reached, the controller obtains the spatial position of the power-reduced photovoltaic panel unit through the solar photovoltaic panel state detection circuit, and analyzes whether there is a shade in the spatial position. When there is a shade, the controller controls the cleaner to have shade The position of the shade is cleaned. When there is no shade, the controller outputs the specific position or code of the photovoltaic panel unit in the photovoltaic panel array to the upper computer.

The advantages of the present invention are: the present invention includes: a photovoltaic panel array, a controller, the controller is electrically connected to the photovoltaic panel array, the controller is connected to the cleaner through a drive unit, and the cleaner is fixed on the power generation array composed of the photovoltaic panel array. At the top, when the photovoltaic panel array has a shading object, the output power of the photovoltaic module is reduced, and the controller cleans the surface of the photovoltaic module through a cleaner. In this way, the photovoltaic power generation unit can be maintained in time.

Description of drawings

The present invention will be further described below in conjunction with embodiment accompanying drawing:

Fig. 1 is a schematic structural view of an embodiment of the present invention;

Fig. 2 is a schematic diagram of the structure of the housing in Fig. 1;

Figure 3 is a schematic diagram of the solar optimization unit.

In the figure, 1. Photovoltaic panel array; 2. Controller; 3. Cleaner; 4. Photovoltaic panel unit; 5. DC-AC converter; 6. Host computer; 7. Solar photovoltaic panel state detection circuit.

Detailed ways

Example 1

A maintenance device for photovoltaic power generation, at least including: a photovoltaic panel array 1, a controller 2 and a cleaner 3, the controller 2 is electrically connected to the photovoltaic panel array), the controller 2 is electrically connected to a cleaner 3, and the controller 2 is also electrically connected to a host computer 6; the photovoltaic panel unit 4 in the detection photovoltaic panel array 1 is provided with a solar photovoltaic panel state detection circuit 7.

Example 2

As shown in Figure 1, a kind of method for photovoltaic cleaning of shading objects for photovoltaic power generation, at least includes: photovoltaic panel array 1, controller 2 and cleaning device 3, described controller 2 is electrically connected with photovoltaic panel array 1, and controller Electrically connected to a cleaning device 3, the controller 2 is also electrically connected to the host computer 6; the controller is used to detect the power of the photovoltaic panel unit 4 in the photovoltaic panel array 1, when a small number of photovoltaic panel units in the photovoltaic panel array 1 and the photovoltaic panel array 1 When the power comparison of most photovoltaic panel units in the same environment in the same environment drops more than the threshold value, the controller obtains the space position of the photovoltaic panel unit with the power reduction through the solar photovoltaic panel state detection circuit 7, and analyzes whether there is a shade 5 at the space position. When there is a shade 5, the controller 2 controls the cleaner 3 to clean the position with the shade 5, and when there is no shade 5, the output of the controller 2 is sent to the host computer 6. The specific location or code of the photovoltaic panel unit.

As shown in Figure 2, described washer 3 comprises high-pressure water head 301, cloud platform 302, high-pressure water pump 303, and high-pressure water head 301 is fixed on the cloud platform 302, and high-pressure water pump 303 is connected with high-pressure water head 301 interface, and the motor of cloud platform 302 It is electrically connected with the controller 2.

The platform is fixed on the top of the photovoltaic panel array 1 .

As shown in Figure 3, the solar photovoltaic panel state detection circuit 7 includes: DC-AC converter 701, voltage and current detection sensing unit 702, processing circuit 703, communication interface 704 and position positioning unit 705, photovoltaic panel array 1 The output terminal is electrically connected to the DC-AC converter 701 and the input terminal of the voltage and current detection sensing unit 702; the output terminal of the voltage and current detection sensing unit 702 is electrically connected to the interface of the processing circuit 703, and the processing circuit 703 is connected through the control port It is electrically connected with the DC-AC converter 701, the communication interface 704 and the position positioning unit 705, and the voltage and current detection sensing unit 702 outputs to the processing circuit 703 the voltage and current output signals of the photovoltaic panel array 1; the processing circuit 703 passes the voltage and current signals, and at the same time obtain the voltage and current signals of the photovoltaic module under the same conditions through the communication interface 704; determine the state of the photovoltaic panel unit 4, and the processing circuit 703 is electrically connected to the controller 2 through the interface, when there is a shade 5 , through the controller 2 to control the cleaner 3 to clean the position with the shade 5, when there is no shade 5, the controller 2 outputs the specific position or code of the photovoltaic panel unit in the photovoltaic panel array 1 to the upper computer 6 .

The components and structures not described in detail in this embodiment are known components and common structures or common means in this industry, and are not described here one by one.

Claims (5)

1. a kind of maintenance device of photovoltaic generation, it is characterized in that：It includes at least：Photovoltaic plate array（1）, controller（2）And cleaning Device（3）, the controller（2）With photovoltaic plate array（1）Electrical connection, controller（2）It is electrically connected a washer（3）, controller （2）Also it is electrically connected with host computer（6）；Detect photovoltaic plate array（1）In photovoltaic plate unit（4）On be provided with solar energy photovoltaic panel State detection circuit（7）.

2. a kind of maintenance device of photovoltaic generation according to claim 1, it is characterized in that：The washer（3）Including High-pressure water head（301）, holder（302）, high-pressure hydraulic pump（303）, high-pressure water head（301）It is fixed on holder（302）On, high-pressure hydraulic pump （303）With high-pressure water head（301）Interface connects, holder（302）Motor and controller（2）Electrical connection.

3. a kind of maintenance device of photovoltaic generation according to claim 2, it is characterized in that：The holder（302）It is fixed In photovoltaic plate array（1）Top.

4. a kind of maintenance device of photovoltaic generation according to claim 1, it is characterized in that：The photovoltaic plate State detection circuit（7）Including：DC-AC converters（701）, voltage and current detection sensing unit（702）, process circuit（703）、 Communication interface（704）With position positioning unit（705）, photovoltaic plate array（1）Output terminal and DC-AC converters（701）And voltage With current detecting sensing unit（702）Input terminal electrical connection；Voltage and current detects sensing unit（702）Output terminal and processing Circuit（703）Interface is electrically connected, process circuit（703）Pass through control mouth and DC-AC converters respectively（701）, communication interface （704）With position positioning unit（705）Electrical connection, voltage and current detection sensing unit（702）To process circuit（703）Output Photovoltaic plate array is provided（1）Voltage and current output signal；Process circuit（703）At to voltage and current signal Reason, while pass through communication interface（704）Obtain the photovoltaic module voltage and current signal under other the same terms；Determine photovoltaic panel Unit（4）State, process circuit（703）Controller is electrically connected by interface（2）, when there is shading object（5）When, pass through controller （2）Control washer（3）To there is shading object（5）Position cleaned, when no shading object（5）When, controller（2）Export to Host computer（6）Transmit photovoltaic plate array（1）In photovoltaic plate unit specific location or coding.

5. a kind of shading object light volt cleaning method of photovoltaic generation, it is characterized in that：It includes at least：Photovoltaic plate array（1）, controller （2）And washer（3）, the controller（2）With photovoltaic plate array（1）Electrical connection, controller（2）It is electrically connected a washer （3）, controller（2）Also it is electrically connected with host computer（6）；Controller（2）For detecting photovoltaic plate array（1）In photovoltaic panel list Member（4）Power, when photovoltaic plate array（1）Middle minority photovoltaic plate unit and photovoltaic plate array（1）In majority under identical environment When photovoltaic panel cell power compares power drop more than threshold values, controller（2）Pass through solar energy photovoltaic panel state detection circuit（7） The spatial position of power drop back light volt plate unit is obtained, whether spatial position where analysis has shading object（5）, when there is shading object （5）When, pass through controller（2）Control washer（3）To there is shading object（5）Position cleaned, when no shading object（5） When, controller（2）It exports to host computer（6）Transmit photovoltaic plate array（1）In photovoltaic plate unit specific location or coding.