TW202113379A - Method of performance detection of photovoltaic device - Google Patents

Abstract

The invention is a method for performance detecting of a photovoltaic device. When a first photovoltaic device and a second photovoltaic device start to obtain a first photovoltaic electrical data, and a data recording device transmit to the data server. Perform a first short circuit and a second short circuit obtain a second photovoltaic electrical data and a third photovoltaic electrical data. Using the first photovoltaic electrical data and the second photovoltaic electrical data, the third photovoltaic electrical data difference calculation, obtaining a fourth photovoltaic electrical data and a fifth photovoltaic electrical data, Perform a photovoltaic electrical average data to respectively calculate the difference between the fourth photovoltaic electrical data and the fifth photovoltaic electrical data, obtaining a sixth photovoltaic electrical data and a seventh photovoltaic electrical data. Comparing the photovoltaic reference values of one of the data servers

Description

Method for detecting solar cell performance

The present invention relates to a detection method, especially a method for solar cell performance detection.

Taiwan is a major producer of solar cell modules, and combined with the government’s non-nuclear homes policy, it has a huge domestic demand market in the country, coupled with years of technology development and experience in expanding domestic and overseas markets. Therefore, whether it is in solar cell modules The construction of production and power generation systems and the operation of power generation fields are of world-class standards, so the development of the overall solar energy industry is very complete.

The aforementioned solar cell (also known as solar wafer or photovoltaic cell) is a device that converts sunlight into electrical energy through the photovoltaic effect. Solar cells are not actually batteries. This is a translated term, which originally meant solar cells.

In common semiconductor solar cells, through proper energy level design, the light emitted by the sun can be effectively absorbed, and voltage and current can be generated. This phenomenon is also called solar photovoltaic.

Solar power generation is a renewable and environmentally friendly power generation method. It does not produce carbon dioxide and other greenhouse gases during the power generation process, so it will not pollute the environment; however, the production process of solar panels generates a large amount of toxic waste water, which needs to be disposed of separately. In addition, discarded solar cells are also a problem. If there is no proper recycling mechanism, it will pollute the environment.

According to the production materials, it is divided into silicon-based semiconductor batteries, CdTe thin-film batteries, CIGS thin-film batteries, dye-sensitized thin-film batteries, organic materials batteries, etc. Among them, silicon batteries are further divided into single crystal silicon batteries, polycrystalline silicon batteries and amorphous silicon thin film batteries. The most important parameter for solar cells is the conversion efficiency. Among the silicon-based solar cells currently developed in the laboratory (not silicon air cells), the efficiency of monocrystalline silicon cells is 25.0%, the efficiency of polycrystalline silicon cells is 20.4%, and CIGS thin film The cell efficiency is 19.8%, the CdTe thin-film cell efficiency is 19.6%, and the amorphous silicon (amorphous silicon) thin-film cell efficiency is 10.1%.

However, although my country’s technology for manufacturing solar cells is very mature, the system maintenance side of solar cells has only begun to vigorously develop in recent years. As the proportion of solar cells increases, the life of solar cells and solar cells The detection accuracy of the panel has been valued, because solar cells will be damaged due to weather, temperature, air and ultraviolet rays. In contrast, power plants that rely on solar power will have to pay more for solar cell detection and testing. service.

The power configuration of the solar battery system is that a single inverter is connected in series with a whole series of solar battery modules, and most of the series modules are connected in series. The power generation data can only be observed from the inverter side, so it can be viewed from The smallest unit for the server to determine the abnormality of the power generation system is usually "a whole series of solar cell module sequences." Finally, maintenance personnel need to be sent to the site for manual inspection to determine the failed modules, which is time-consuming and labor-intensive.

Although some manufacturers use drone aerial photography technology to conduct inspections of solar cells, hoping to reduce maintenance costs by using drone technology, the inspection method of drones can only be used as a quick screening function. A thermal camera is used to check whether the temperature of the solar cell is too high. If it is to accurately detect the operating efficiency and health of the solar cell, this detection method is not complete.

In addition, electrical monitoring devices for solar cell modules have been developed, which can monitor the power generation information of solar cell modules at any time, and perform diagnosis and treatment based on the found data. However, such monitoring devices have a complex structure and are installed in each solar cell module. Electrical monitoring modules must be installed in the group, and the installation cost is relatively high, so such products are rarely seen in solar cells at present.

Therefore, in order to make the maintenance method of the solar cell system more economical and time-efficient, it is necessary to improve the current maintenance method, and reduce the cost of manpower maintenance and the loss of power generation when the module fails and waits for repair materials through automatic diagnosis technology.

Based on the above content, it can be known that the present invention provides a method for detecting the performance of solar cells. It monitors the electrical characteristics of solar cell power generation system modules in a remote manner, and diagnoses the signs of solar cell degradation early, and then performs materials early. Preparation and personnel arrangements effectively reduce the operation and maintenance costs of the power generation system.

One purpose of the present invention is to provide a method for detecting the performance of solar cells, which establishes an automatic detection mechanism for solar power generation systems, and regularly tracks the electrical characteristics of individual solar cells, so that module failure behaviors can be determined early, and the behavior of module failures can be determined early. Make backup preparations for replacement products to maintain the power generation stability of the solar cell power generation system.

In view of the above-mentioned objective, the present invention provides a method for detecting the performance of solar cells, the steps of which include: activating a first solar cell and a second solar cell, obtaining a first battery electrical data through an inverter, and The first battery electrical data is transmitted to a data server through a data recording device; a first short-circuit procedure is executed on the circuit loop of the first solar battery, and a second battery electrical data is obtained through the inverter; execute A second short-circuit procedure is in the circuit loop of the second solar battery, and a third battery electrical data is obtained through the inverter; the first battery electrical data is respectively the same as the second battery electrical data and the third battery After performing the difference calculation on the electrical data, a fourth battery electrical data and a fifth battery electrical data are obtained respectively; and the fourth battery electrical data and the fifth battery electrical data are averaged to obtain a battery electrical data And then perform the difference calculation between the battery electrical average data and the fourth battery electrical data and the fifth battery electrical data to obtain a sixth battery electrical data and a seventh battery electrical data Then, compare a battery reference value set in the data server.

The present invention provides an embodiment, wherein the first solar cell is connected in series with the second solar cell.

The present invention provides an embodiment, wherein the data recording device is transmitted in a wired or wireless manner.

The present invention provides an embodiment, in which, before starting a first solar cell and a second solar cell, and obtaining a first battery electrical data through an inverter, it includes the step of: sending a switch through the data server The signal is sent to a power switch device to open the circuit loop of an AC terminal of the inverter.

The present invention provides an embodiment, wherein the battery reference value is set according to the current, voltage or maximum power value of different solar cells.

The present invention provides an embodiment, wherein before the step of performing a first short-circuit procedure on the first solar cell, the method includes the step of electrically connecting a first switching element to a control device and the first solar cell, and then using the control The device receives a first activation message sent by the data server and activates the first switch element.

The present invention provides an embodiment, wherein the first short-circuit procedure step includes the control device transforming the first activation message into a first control signal and transmitting it to a first switching element, and controlling the first switching element to be turned on.

The present invention provides an embodiment, wherein after the step of obtaining a second battery electrical data through the inverter, the data server transmits a first shutdown message through a wireless transmission module to the control device to shut down the second battery. A switching element.

The present invention provides an embodiment, wherein before the step of causing the second solar cell to perform a second short-circuit procedure, the step includes the step of electrically connecting a second switching element to the control device and the second solar cell, and then receiving the data The server sends a second activation message and activates the second switch element.

The present invention provides an embodiment, wherein the second short-circuit procedure step includes the control device transforming the second activation message into a second control signal, transmitting to the second switching element, and controlling the second switching element to be turned on.

The present invention provides an embodiment, wherein after the step of obtaining a third battery electrical data through the inverter, the step includes the step of the data server sending a second closing message to the control device to close the second switching element.

The present invention provides an embodiment, wherein the data recording device is electrically connected to an inverter, and the inverter is electrically connected to the first solar cell and the second solar cell, respectively.

The present invention provides an embodiment, wherein the electrical data of the first battery is the sum of the voltages of the first solar battery and the second solar battery.

In order to enable your reviewer to have a better understanding and understanding of the features of the present invention and the effects achieved, the preferred embodiments and detailed descriptions are provided here. The description is as follows:

The maintenance and repair of conventional solar cells after the installation is completed requires manpower to be inspected one by one in person, which is time-consuming and labor-intensive, and when the solar cells need to be repaired are detected, the repair materials will be purchased and waited. At the time of material arrival, the loss of solar energy continues, which causes a certain loss of power generation efficiency.

The advantage of the present invention is that it does not require manpower to be on-site to check the wear rate of the solar cell, and the detection process can also be used. The improvement of the present invention provides a solar cell performance detection method, which can diagnose the solar cell early. Signs of decline, and then prepare materials and arrange personnel early, effectively reducing the operation and maintenance costs of the power generation system.

Hereinafter, various embodiments of the present invention will be described in detail through the use of drawings. However, the concept of the present invention may be embodied in many different forms, and should not be construed as being limited to the exemplary embodiments described herein.

First of all, please refer to Figure 1A, which is a flowchart of a method according to an embodiment of the present invention. As shown in the figure, the flow of steps of the first embodiment of the present invention includes:

Step S10: Start the first solar cell and the second solar cell, obtain the electrical data of the first battery through the inverter, and transmit the electrical data of the first battery to the data server through the data recording device;

Step S20: Execute the first short-circuit procedure on the circuit loop of the first solar battery, and obtain the electrical data of the second battery through the inverter;

Step S30: Execute the second short-circuit procedure on the circuit loop of the second solar battery, and obtain the electrical data of the third battery through the inverter;

Step S40: After performing difference calculations on the first battery electrical data and the second battery electrical data and the third battery electrical data, respectively, the fourth battery electrical data and the fifth battery electrical data are obtained; and

Step S50: Take the fourth battery electrical data and the fifth battery electrical data and perform average calculation to obtain the battery electrical average data, and then separate the battery electrical average data with the fourth battery electrical data and the fifth battery electrical data Perform a difference calculation to obtain the sixth battery electrical data-the seventh battery electrical data, and compare the battery reference value set in the data server.

First, before step S10, it includes the following steps:

Step S12: Send a switching signal to the circuit loop of the AC terminal of the open-circuit inverter of the power switch device through the data server.

Send a switching signal M0 to a power switch device 70 through a data server 40 to open a circuit loop of an AC terminal AC of an inverter 50, and then start a first solar cell 10 and a second solar cell through step S10 20. Obtain a first battery electrical data 41 through the inverter 50, and transmit the first battery electrical data 41 to the data server 40 through a wireless communication module 62 of a data recording device 60 .

Wherein, in this embodiment, the first solar cell 10 and the second solar cell 20 are connected in series, and the inverter 50 is electrically connected to the first solar cell 10 and the second solar cell 20. The converter 50 is electrically connected to the data recording device 60, and the inverter 50 is connected to the alternating current terminal AC with the power switch device 70.

Following the above description in this embodiment, when the first solar cell 10 and the second solar cell 20 are operating, the first battery electrical data 41 is generated, and the inverter 50 receives the first battery electrical data 41 At this time, the first battery electrical data 41 is transmitted to the data server 40 for storage through the wireless communication module 62 in the data recording device 60, wherein the data recording device 60 and the data server 40 are described above. The transmission can be carried out through wireless transmission or wired network transmission. This embodiment uses the wireless communication module 62 for description, but is not limited to this.

Then, step S20 includes steps:

Step S22: electrically connect the first switching element to the control device and the first solar cell; and

Step S24: Use the control device to receive the first activation message sent by the data server and activate the first switch element.

Please also refer to Figure 2B, which is a schematic diagram of the activation of a switching element in an embodiment of the present invention. As shown in the figure, step S20, step S22, and step S24 use a wireless transmission module 32 on a control device 30 to receive The data server 40 transmits a first activation message M1 and activates a first switching element 12, so that the first solar cell 10 executes a first short-circuit procedure, and then obtains a second battery electrical property through the inverter 50 The data 43 and the second battery electrical data 43 are communicated to the data server 40 through the wireless communication module 62 for storage. The control device 30 and the data server 40 can be transmitted wirelessly or by The wireless transmission module 32 or the wireless communication module 62 is used for description in this embodiment, but not limited to this. The control device 30 is electrically connected to the first The switching element 12, furthermore, the first switching element 12 is electrically connected to the first solar cell 10, and the steps of the first short-circuit procedure included in the step S20:

Step S26: The control device converts the first activation message into a first control signal and transmits it to the first switching element, and controls the first switching element to be turned on.

Wherein, in step 26, the control device 30 is used to convert the first activation message M1 sent by the data server 40 into a first control signal M2 to control the first switching element 12 to be turned on, so that the first solar cell 10 is switched on The open circuit turns into a closed circuit, forming the first short-circuit procedure.

The above-mentioned control device 30 is a control circuit, which includes a central processing unit, a memory, a timer (or counter), an input port, and an output port. Through the central processing unit on the control circuit, the received second A start message M1 is converted into the first control signal M2, and then transmitted to the first switching element 12 to control the first switching element 12 to be turned on (Turn On) to turn it from an open circuit to a closed circuit, thereby prompting the first solar cell 10 short circuit without outputting any power.

When the first switching element 12 turns from an open circuit to a closed circuit, the first solar cell 10 connected in parallel with the first switching element 12 turns the first switching element 12 into a short-circuit state and is bypassed, and the inverter The circuit loop between the inverter 50 and the AC terminal AC is open. At this time, the second battery electrical data 43 of the solar module sequence obtained by the inverter 50 will not include the bypassed first switch The battery electrical data of the first solar cell 10 connected in parallel with the element 12.

After obtaining the second battery electrical data 43 through step S20, continue with the steps:

Step S28: After obtaining the second battery data and transmitting it to the data server, the data server transmits the first closing message to the control device through the wireless transmission module to turn off the first switch element.

After obtaining the second battery electrical data 43, the data server 40 sends a first turn-off message M3 to turn off the first switching element 12, so that the first solar cell 10 returns to the normal power supply state, and after obtaining After the second battery electrical data 43, step S30 includes the steps:

Step S32: electrically connect the second switching element to the control device and the second solar cell; and

Step S34: Receive the second activation message sent by the data server and activate the second switch element.

Next, in step S30, please refer to FIG. 2C, which is a schematic diagram of the switch element activation of an embodiment of the present invention. The wireless transmission module 32 on the control device 30 is used to receive one of the transmissions from the data server 40 The second activation message M4 activates a second switching element 22 to cause the second solar cell 20 to perform a second short-circuit procedure, and then obtain a third battery electrical data 45 through the inverter 50, and transfer the third The battery electrical data 45 is transmitted to the data server 40 through the wireless communication module 62 for storage. The control device 30 is electrically connected to the second switch element 22, and further, the second switch element 22 Electrically connected to the second solar cell 20, and the steps of the second short-circuit procedure included in the step S30:

Step 36: The control device converts the second activation message into a second control signal and transmits it to the second switching element, and controls the second switching element to be turned on.

Wherein, in step 32, the control device 30 is used to convert the second activation message M4 sent by the data server 40 into a second control signal M5, and the second switch element 22 is controlled to be turned on (Turn On) to make the second The solar cell 20 turns from an open circuit to a closed circuit, forming the second short-circuit procedure, prompting the second solar cell 20 to be short-circuited without outputting any power. The above-mentioned control device 30 is a control circuit, which has been explained in the previous paragraph. Go into details again.

When the second switching element 22 turns from an open circuit to a closed circuit, the second solar cell 20 connected in parallel with the second switching element 22 turns the second switching element 22 into a short-circuit state and is bypassed, and the inverter The circuit loop between the inverter 50 and the AC terminal AC is open. At this time, the third battery electrical data 45 of the solar module sequence obtained by the inverter 50 will not include the bypassed second switching element 22. Battery electrical data of the second solar cell 20 connected in parallel.

After obtaining the third battery electrical data 45 through step S30, proceed to steps:

Step S38: After obtaining the third battery data and transmitting it to the data server, the data server sends a second off message to the control device to turn off the second switch element.

After the data server 40 obtains the third battery electrical data 45, it sends a second off message M6 to the control device 30 through the wireless transmission module 32 to turn off the second switch element 22, so that the The second solar cell 20 returns to the normal power supply state.

After the data server 40 obtains the second battery electrical data 43 and the third battery electrical data 45, as described in steps S40 to S50, the data server 40 separates the first battery electrical data 41 After calculating with the second battery electrical data 43 and the third battery electrical data 45, a fourth battery electrical data 47 and a fifth battery electrical data 49 are obtained respectively, and the fourth battery electrical data is obtained 47 and the fifth battery electrical data 49 are averaged to obtain a battery electrical average data 44, and then the battery electrical average data 44 is respectively compared with the fourth battery electrical data 47 and the fifth battery electrical data 49 performs a difference operation to obtain a sixth battery electrical data 46 and a seventh battery electrical data 48, and compare a battery reference value 42 set in the data server 40.

Wherein, the first battery electrical data 41 and the second battery electrical data 43 are calculated to obtain the fourth battery electrical data 47, and the fourth battery electrical data 47 is the first solar cell 10 In the same way, it can be known that the fifth battery electrical data 49 is the battery electrical data of the second solar cell 20.

Then use the fourth battery electrical data 47 and the fifth battery electrical data 49 to obtain the battery electrical average data 44 obtained by averaging, and perform the difference calculation with the fourth battery electrical data 47 to obtain the first battery electrical data. Six battery electrical data 46. The sixth battery electrical data 46 is the difference between the first solar cell 10 and the battery electrical average data 44. Similarly, the seventh battery electrical data 48 is the second solar cell The difference between 20 and the battery electrical average data 44.

Therefore, after comparing the sixth battery electrical data 46 with the battery reference value 42, if the sixth battery electrical data 46 is less than the battery reference value 42, the data server 40 will perform the first solar cell 10 It is judged that manual maintenance is required, so a message is sent to a maintenance organization (not shown) so that the maintenance organization can arrange the maintenance time of the first solar cell 10, and has sufficient time to prepare for maintenance. The battery reference value 42 is the current, voltage or maximum power value set according to different solar cells. The solar cells used in the present invention are silicon-based semiconductor cells, CdTe thin-film cells, CIGS thin-film cells, and dyes. One of sensitized thin film batteries, organic material batteries, concentrating III-V group multi-junction solar cells, or any of the foregoing.

Therefore, it is known from the above content that the solar cell performance detection method of the present invention is used in a series of solar cell modules, and only one solar cell module is short-circuited at a time. This method is to avoid voltage If it is too low, the inverter will stop working, and the data recording device will not be able to obtain any battery electrical data, instead of short-circuiting the solar battery module and other battery modules, only the battery module to be tested is not short-circuited to obtain it. The electrical data of the battery module. Therefore, the performance detection method of the solar cell of the present invention is used for two or more solar cell modules connected in series. In one embodiment of the present invention, the first solar cell is used. The battery 10 and the second solar cell 20 are illustrated, but not limited to this.

According to conventional information, solar cells are formed by joining P-type and N-type semiconductors. This structure is usually called PN junction, where the P-type and N-type semiconductors are joined because of the effective carrier concentration. Diffusion is caused by the difference, and a built-in electric field is generated from the N-type to the P-type. When the photon is absorbed, the generated electron will be moved to the N-type semiconductor by the built-in electric field, and the hole will move to the P-type semiconductor. In this way, charges can be accumulated on both sides, and current can be generated when connected through wires. Solar cells collect electrons and holes before recombination.

(1)Solar power conversion efficiency η can be defined as Equation (1), wherein, P _out is the cell output, P _in is the power of the incident light, V _OC is an open circuit voltage, I _SC is a short-circuit current.

(1)

FF is called Fill factor, which is defined as the solar cell when the maximum electric power output, please refer to Figure 3, which is a schematic diagram of the current and voltage curve of the solar cell of the present invention, as shown in the figure, the maximum output power P _{max 𝑉} 𝑂𝐶 the open circuit voltage and short circuit current value _𝐼 𝑆𝐶 ratio of the product, i.e. the current - voltage characteristic curve the maximum power rectangle (gray area) ratio of _𝑉 𝑂𝐶 x𝐼 rectangular _𝑆𝐶.

(2)

(3)In fact, in the electrical output characteristics of the solar cell decay process, the main core factors are series resistance 𝑅 _𝑆 and parallel resistance 𝑅 _𝑆𝐻 , and series resistance 𝑅 _𝑆 and parallel resistance 𝑅 _𝑆𝐻 are calculated by the following formulas:

(2)

(3)

Please refer to FIG. 4, which is a schematic diagram of an equivalent circuit of the solar cell, as shown in FIG diode D is connected across the positive and negative poles of a current _source, 𝑅 𝑆 _H values originally approaches infinity, the equivalent circuit can be regarded as Open circuit, however, when the solar cell begins to decline, the _{value of 𝑅 𝑆𝐻} becomes smaller. When the voltage end is open, part of the current generated by the current source flows through 𝑅 _𝑆𝐻 causing voltage loss, so the final open circuit voltage value of the battery will become smaller, so The change in _{𝑅 𝑆𝐻} can be reversed by the open circuit voltage value of the battery.

In addition, because the open circuit voltage of the battery itself will also be affected by changes in environmental factors, the voltage value will drop, which will further cause misjudgment of _{changes in 𝑅 𝑆𝐻} . Therefore, this embodiment uses the relative comparison method to _{determine the changes in 𝑅 𝑆𝐻} through the same sequence of solar cell modules. Collect data in the same environment and at the same time period, and then use the collected battery electrical data to perform interactive calculations to eliminate the distortion of battery electrical data caused by environmental factors. Therefore, in an embodiment of the present invention, please refer to Table 1. The electrical detection of solar cells is performed through the method of the present invention, and the ΔV _oc value is calculated to confirm whether the solar cells begin to decline. Table 1 Experimental test results table Irradiance (W/m ² ) V _OC (V) I _SC (A) P _m (W) V _m (V) I _m (A) Eff.(%) FF 1-8 850 24.617 1.413 26.10 20.63 1.265 26.65 0.745 Short-1st 850 21.584 1.412 22.77 18.12 1.256 23.25 0.747 Short-2nd 850 21.585 1.415 22.65 18.12 1.250 23.13 0.741 Short-3rd 850 21.614 1.415 22.61 18.13 1.247 23.09 0.739 Short-4th 850 21.695 1.416 22.81 18.13 1.257 23.30 0.742 Short-5th 850 21.579 1.414 22.76 18.12 1.256 23.25 0.746 Short-6th 850 21.610 1.383 22.62 17.65 1.281 23.10 0.757 Short-7th 850 21.661 1.417 22.87 18.13 1.261 23.36 0.745 Short-8th 850 21.610 1.409 22.91 18.13 1.263 23.40 0.753

(4) 表2 各組太陽能電池之Voc值 V_oc 4^th cell 3^rd cell 2^nd cell 1^st cell 2.921 3.003 3.031 3.033 5^th cell 6^th cell 7^th cell 8^th cell 3.037 3.006 2.956 3.006 In Table 2, the calculation method of V _OC ^{value of 1 st} cell can refer to formula (4), and the calculation of V _OC value of ^{2 nd} cell~8 ^{th cell can be deduced by analogy.}

(4) Table 2 Voc value of each group of solar cells V _oc 4 ^th cell 3 ^rd cell 2 ^nd cell 1 ^st cell 2.921 3.003 3.031 3.033 5 ^th cell 6 ^th cell 7 ^th cell 8 ^th cell 3.037 3.006 2.956 3.006

(5)

(6) 表3 各組太陽能電池之△Voc值 △V_oc 4^th cell 3^rd cell 2^nd cell 1^st cell -0.078 0.003 0.032 0.033 5^th cell 6^th cell 7^th cell 8^th cell 0.038 0.007 -0.043 0.007 In Table 3, the 1 ^st cell △ V _OC value may be calculated with reference to equation (6), the value of △ V _OC 2 ^nd cell ~ 8 ^th cell and so the calculation may be.

(5)

(6) Table 3 The △Voc value of each group of solar cells △V _oc 4 ^th cell 3 ^rd cell 2 ^nd cell 1 ^st cell -0.078 0.003 0.032 0.033 5 ^th cell 6 ^th cell 7 ^th cell 8 ^th cell 0.038 0.007 -0.043 0.007

_{It can be seen from Table 3 that the △V oc} value of the fourth group of solar cells and the seventh group of solar cells is relatively low. From the table above, it can be seen that the △V _oc value of the fourth group of solar cells is about -0.078, and the seventh group of solar cells is about -0.078. The △V _oc value is about -0.043, which is lower than that of solar cells. Therefore, it is judged that the fourth group of solar cells and the seventh group of solar cells need battery maintenance.

In the above-mentioned embodiment, the method of the present invention is a method for detecting the performance of solar cells. It regularly monitors the electrical characteristics of solar cell power generation system modules through a remote method, and diagnoses signs of solar cell degradation early, and then Early preparation of materials and personnel arrangements can effectively reduce the operation and maintenance costs of the power generation system.

Therefore, the present invention is really novel, progressive, and available for industrial use. It should meet the patent application requirements of my country's patent law. Undoubtedly, I filed an invention patent application in accordance with the law. I pray that the Bureau will grant the patent as soon as possible.

However, the above are only the preferred embodiments of the present invention, and are not used to limit the scope of implementation of the present invention. For example, the shapes, structures, features and spirits described in the scope of the patent application of the present invention are equally changed and modified. , Should be included in the scope of patent application of the present invention.

10: first solar cell 12: first switching element 20: second solar cell 22: second switching element 30: control device 32: wireless transmission module 40: data server 41: first battery electrical data 42: battery Reference value 43: second battery electrical data 44: battery electrical average data 45: third battery electrical data 46: sixth battery electrical data 47: fourth battery electrical data 48: seventh battery electrical data 49 : Fifth battery electrical data 50: Inverter 60: Data recording device 62: Wireless communication module 70: Power switch device M0: Switching signal M1: First activation message M2: First control signal M3: First shutdown message M4: second start message M5: second control signal M6: second close message AC: AC terminal P _max : battery output power I _sc : short circuit current V _oc : open circuit voltage I _L : load current D: diode R _S : Series resistance R _SH : Parallel resistance V: Voltage I: Current S10, S20, S30, S40, S50: Step

Figure 1: It is a flowchart of a method according to an embodiment of the present invention; and Figure 2A: It is a block diagram of an embodiment of the present invention; Figure 2B: It is a schematic diagram of the activation of a switching element according to an embodiment of the present invention; Figure 2C: It is a schematic diagram of the activation of a switching element according to an embodiment of the present invention; Figure 3: It is a schematic diagram of the current-voltage curve of the solar cell of the present invention; and Figure 4: It is a schematic diagram of the equivalent circuit of a solar cell.

S10, S20, S30, S40, S50: steps

Claims (13)

A method for detecting the performance of solar cells, the steps include: Start a first solar cell and a second solar cell, obtain a first battery electrical data through an inverter, and transmit the first battery electrical data to a data server through a data recording device; Execute a first short-circuit procedure on the circuit loop of the first solar battery, and obtain a second battery electrical data through the inverter; Perform a second short-circuit procedure on the circuit loop of the second solar battery, and obtain a third battery electrical data through the inverter; After performing difference calculations on the first battery electrical data, the second battery electrical data and the third battery electrical data, respectively, a fourth battery electrical data and a fifth battery electrical data are obtained; and Take the fourth battery electrical data and the fifth battery electrical data to perform an average calculation to obtain a battery electrical average data, and then the battery electrical average data is respectively compared with the fourth battery electrical data and the fifth battery After performing a difference operation on the electrical data, a sixth battery electrical data and a seventh battery electrical data are obtained, and then a battery reference value set in the data server is compared. The method for detecting the performance of a solar cell as described in item 1 of the application, wherein the first solar cell and the second solar cell are connected in series. The method for detecting the performance of solar cells as described in item 1 of the application, wherein the data recording device is transmitted through wired or wireless means. The method for detecting the performance of a solar cell as described in item 1 of the application, before starting a first solar cell and a second solar cell, and obtaining electrical data of a first battery through an inverter, it includes step: A switching signal is sent to a power switch device through the data server to open a circuit loop of an AC terminal of the inverter. The method for detecting the performance of solar cells as described in item 1 of the application, wherein the battery reference value is the current, voltage or maximum power value set according to different solar cells. The method for detecting the performance of a solar cell as described in item 1 of the application, wherein before the first solar cell performs a first short-circuit procedure, the method includes the following steps: Electrically connecting a first switch element to a control device and the first solar cell; and Using the control device to receive a first activation message sent by the data server and activate the first switch element. The method for detecting solar cell performance as described in item 1 of the application item, wherein the first short-circuit procedure step includes: The control device converts the first activation message into a first control signal and transmits it to a first switching element, and controls the first switching element to be turned on. For the method of solar cell performance detection described in item 1 of the application, after the step of obtaining a second battery electrical data through the inverter, it includes the step of: the data server transmits a data through a wireless transmission module The first closing message is sent to the control device to turn off the first switch element. The method for detecting the performance of a solar cell as described in item 1 of the application item, wherein before the step of performing a second short-circuit procedure on the second solar cell, the method includes the following steps: Electrically connecting a second switch element to the control device and the second solar cell; and A second activation message sent by the data server is received and the second switch element is activated. The method for solar cell performance detection described in item 1 of the application item, wherein the second short-circuit procedure step includes: The control device converts the second activation message into a second control signal and transmits it to a second switch element, and controls the second switch element to be turned on. Such as the method for solar cell performance detection described in item 1 of the application, wherein after the step of obtaining a third battery electrical data through the inverter, the data server sends a second shutdown message to the control device and Turn off the second switching element. The method for detecting solar cell performance as described in item 1 of the application, wherein the data recording device is electrically connected to the inverter, and the inverter is electrically connected to the first solar cell and the second solar cell, respectively Solar battery. The method for detecting solar cell performance as described in item 1 of the application item, wherein the first The battery electrical data is the sum of the voltages of the first solar cell and the second solar cell.

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