WO2023279294A1

WO2023279294A1 - Solar-powered module efficiency monitoring improvement method and solar-powered module system

Info

Publication number: WO2023279294A1
Application number: PCT/CN2021/105013
Authority: WO
Inventors: 陈进雄; 林培钦; 颜来平; 蒋瑞康; 林献章; 李金颖
Original assignee: 艾思特能源股份有限公司
Priority date: 2021-07-07
Filing date: 2021-07-07
Publication date: 2023-01-12

Abstract

Provided in the present disclosure are a solar-powered module efficiency monitoring improvement method. The method comprises: continuously exposing an evaluation module to an environmental factor of an actual environment, so that same is illuminated and generates power, and isolating a reference module from the environmental factor; exposing the reference module to the actual environment for a specific time period, so that same is illuminated and generates power; after the end of the specific time period, returning the reference module to the state of being isolated from the environmental factor; and comparing the power generation capacities, during the specific time period, of the evaluation module and the reference module.

Description

Solar module performance monitoring improvement method and solar module system

Cross References to Related Applications

This application claims priority to a Taiwan patent application filed with the Taiwan Patent Office on July 30, 2020, with application number 109125797, entitled "Solar Module Efficiency Monitoring Improvement Method and Solar Module System", the entire contents of which are incorporated by reference in this application.

technical field

The disclosure relates to an improved method for monitoring the performance of a solar module and a solar module system using the method.

Background technique

With the development of solar power generation technology, solar power generation modules are gradually being widely used by consumers in daily life. However, environmental factors have a great influence on the power generation efficiency of the solar power generation module. For example, factors such as climate, season, and day and night all affect the amount of sunlight. As another example, dirt or dust on the solar power generation modules will also have a considerable impact on the power generation. Since the above factors will change the power generation efficiency of the solar power generation module, it is necessary to investigate their impact.

TWI571646 discloses a solar module efficiency monitoring system and its monitoring method, which uses a reference module whose surface is often kept in a clean state, and an evaluation module whose surface is covered with dust caused by the actual environment, so as to monitor the performance of the solar module due to dust. resulting in a decrease in power generation efficiency. In this prior art, the difference between the rated power generation of the reference module and the actual power generation of the evaluation module is used to obtain the decrease in power generation efficiency caused by dust, so as to monitor the performance of the solar module.

However, in TWI571646, after the solar module is set up, the reference module and the evaluation module are continuously (24 hours) measured and monitored, and the reference module is continuously cleaned by the cleaning device to keep it in a clean state. This method does not actually take into account that the reference module will not be able to maintain the rated power generation due to continuous illumination, resulting in a decline in light conversion efficiency, which will lead to an inability to correctly compare the difference in power generation. Furthermore, it has not been taken into account that the cleaning liquid of the cleaning device will also have adverse effects on the solar modules. For example, the cleaning liquid remaining on the module will block the light or penetrate into the circuit to cause a short circuit, etc., and the above-mentioned continuous measurement and monitoring And the use of a cleaning device also leads to an increase in cost.

In addition, it is particularly worth noting that when monitoring the performance of solar modules, it is not necessary to continuously measure and monitor the whole day like the existing technology, as long as the sunlight is received at the time of the day when the sun is strongest and the power generation is compared, it can be obtained The monitoring effect is the same as that of the prior art.

Contents of the invention

In view of the above-mentioned problems and findings, the present inventors actively engaged in research and development, expecting to provide a solar module efficiency monitoring improvement method and a solar module system using the method. Through this disclosure, the reference module can be prevented from being affected by environmental factors. , so that the power generation efficiency of the solar module can be monitored more accurately, and the power consumption cost for monitoring can be saved and the life of the module can be extended. The present inventor finally developed the present disclosure through continuous experiments and efforts.

In one aspect, the present disclosure provides an improved method for solar module performance monitoring, including:

The continuous exposure assessment module uses light to generate electricity under the environmental factors of the actual environment, and isolates the reference module from the environmental factors;

Exposing the reference module to the environmental factor of the actual environment for a specific time period to generate light;

returning the reference module to a state of isolation from the environmental factor after the specified time period has elapsed; and

comparing the power generation of the evaluation module with the power generation of the reference module in the specific time period.

Another aspect of the present disclosure provides a solar module system comprising:

The evaluation module, which is a solar power generation panel, is exposed to the actual environment;

a reference module, which is a solar power generation panel, arranged in such a way as to isolate environmental factors; and

The control unit uses the improved method for monitoring the efficiency of the solar module to monitor the power generation of the solar module system.

According to the improved method of solar module efficiency monitoring disclosed in the present disclosure and the solar module system using the method, the reference module can be prevented from being affected by environmental factors, and the power generation efficiency of the solar module can be monitored more accurately, and the consumption for monitoring can be saved. electricity costs and extend module life.

Description of drawings

Figure 1A shows a schematic diagram of an embodiment of a solar module system;

Figure 1B shows a schematic diagram of another embodiment of a solar module system;

FIG. 2 shows a flow chart of the improved method for solar module performance monitoring of the present disclosure;

FIG. 3 shows a schematic diagram of measurement results using the improved method for monitoring solar module performance of the present disclosure;

FIG. 4 is a schematic diagram showing a comparison between a reference module using the improved solar module performance monitoring method of the present disclosure and a conventional reference module.

【Symbol Description】

1 solar module system

10 evaluation modules

20 reference modules

30 isolation components

40 Control Department

Steps S1～S4

detailed description

Hereinafter, referring to FIG. 1A and FIG. 1B , the solar module system 1 using the disclosed method will be described. FIG. 1A shows a schematic diagram of an embodiment of a solar module system, and FIG. 1B shows a schematic diagram of another embodiment of a solar module system.

1A, the present disclosure provides a solar module system 1, including: an evaluation module 10, which is a solar power generation panel, which is exposed to the actual environment; a reference module 20, which is another solar power generation panel, which can isolate environmental factors Or set in a way that can be selectively exposed to the actual environment; and the control unit 40 uses the improved method for monitoring the performance of the solar module of the present disclosure to monitor the performance of the solar module system.

The aforementioned environmental factors may be sunlight, dust, and water, but are not limited to the above examples.

Generally speaking, the above-mentioned environmental factors all have top-down characteristics. For example, sunlight is irradiated from top to bottom, and dust and water will be deposited or dropped due to gravity. In order to isolate the reference module 20 from environmental factors or avoid stacking on its surface, in the embodiment of the present disclosure, the reference module 20 is set to be reversible. By turning the reference module 20, the back side of the reference module 20 (non-light receiving surface) can be made upward, so that the light-receiving surface of the reference module 20 is isolated from the above-mentioned environmental factors.

In an embodiment, a motor (not shown in the figure) that can drive the reference module 20 to turn up and down is connected to one side of the reference module 20 in the present disclosure, and the control unit 40 is received through the connection between the motor and the control unit 40 instruction to carry out the flipping operation of the reference module 20 up and down.

The control unit 40 is, for example, a computer, which can control the inversion of the reference module 20 according to a default program, and record and compare the power generation measured by the self-assessment module 10 and the reference module 20 . In addition, the control unit 40 can also transmit the power generation of the evaluation module 10 and the reference module 20 or the result of the comparison of the power generation by wired or wireless means.

However, the present disclosure is not limited thereto. Referring to FIG. 1B , the solar module system 1 is further provided with an isolation member 30 , such as a light-tight isolation cover. By covering the reference module 20 with the isolation cover of the isolation member 30 , the reference module 20 can be isolated from environmental factors. At this time, the control unit 40 controls the isolation member 30 to cover or keep away from the light-receiving surface of the reference module 20 through a default program.

In an embodiment, the present disclosure is provided with a guide rail (not shown in the figure) on at least one side of the reference module 20, and the isolation member 30 is provided with a guide rail corresponding to the guide rail and allowing the isolation member 30 to slide close to or away from the guide rail. The rollers of the reference module 20 (not shown in the figure). Through the cooperation of the guide rail and the rollers, the isolation member 30 can approach or move away from the reference module 20 .

Furthermore, referring to the contents shown in FIG. 2 , the method for improving the performance monitoring of solar modules according to the embodiment of the present disclosure will be described. FIG. 2 shows a flow chart of the improved method for solar module performance monitoring of the present disclosure.

The improved method of solar module performance monitoring in the embodiment of the present disclosure includes step S1: the continuous exposure assessment module 10 uses light to generate electricity in the actual environment, and isolates the reference module 20 from environmental factors; step S2: exposes the reference module 20 in a specific time period In the actual environment to perform light generation; step S3: after the end of the specific time period, make the reference module 20 return to the state of isolation from environmental factors; and step S4: compare the evaluation module 10 in the specific time period and the power generation of the reference module 20.

Each step of the method of the present disclosure will be described in detail below. Step S1 is to continuously expose the evaluation module 10 to generate electricity with light in the actual environment, and isolate the reference module 20 from environmental factors. Specifically, in step S1, the evaluation module 10 is set in the actual environment, and the reference module 20 is isolated from environmental factors (such as sunlight, dust, and water) by, for example, turning over, or by covering the isolation member 30 on the reference module, for example. 20 to isolate environmental factors. In this case, the light-receiving surface of the reference module 20 cannot be irradiated or directly irradiated by light, so no power generation will be performed.

Step S2 exposes the reference module 20 in an actual environment for a specific period of time to generate light. Specifically, for example, during the time period when the illumination is strongest or changes during the day, by turning the reference module 20 such as the light-receiving surface upwards, or by allowing the isolation member 30 to be removed from the reference module 20, the reference module 20 Photoelectric power generation. This time period can be a plurality of time periods, and is preset in the control unit 40 .

Step S3 returns the reference module 20 to a state of isolation from environmental factors after the specific time period ends. Specifically, for example, after the time period exposed to the actual environment ends, the light-receiving surface of the reference module 20 is turned downward again by, for example, turning over, or the environment is isolated by covering the reference module 20 with the isolation member 30 factor. In this case, the reference module 20 stops generating power.

Step S4: Compare the power generation of the evaluation module 10 and the power generation of the reference module 20 in the specific time period. Specifically, comparing the power generation of the evaluation module 10 and the power generation of the reference module 20 in the specific time period, the difference between the power generation of the two modules is the loss of power generation due to the above environmental factors. The operator can pass The difference is used to monitor the change of the power generation efficiency of the solar module system. If the reference module 20 is allowed to generate light and generate electricity in a plurality of specific time periods, the difference in power generation in each time period will be averaged as the difference in power generation.

Hereinafter, effects of the present disclosure will be described with reference to FIGS. 3 and 4 . FIG. 3 shows a schematic diagram of measurement results using the improved solar module performance monitoring method of the present disclosure. FIG. 4 shows a schematic diagram comparing the power generation percentages of the reference module 20 using the improved solar module performance monitoring method of the present disclosure and the existing reference module. The ordinates in Fig. 3 and Fig. 4 are the percentages of power generation (%), and the abscissas are the time and days of use.

Referring to FIG. 3 , the improved solar module performance monitoring method of the disclosed embodiment is used to allow the reference module 20 to generate light and generate electricity in multiple time periods (for example, at 7:59~8:16, 8:50~9:07, 9:00 58～10:15... etc.), as a result, it can be found that the difference in power generation using the existing reference module is 11.2%, while the difference in power generation using the reference module 20 of the present disclosure is 11.1%. Therefore, it can be seen that there is almost no difference in power generation in multiple time periods when using the reference module 20 compared to using the existing reference module, which proves that the improved method for monitoring the performance of solar modules of the present disclosure does not need to be integrated as in the prior art. Daily continuous measurement and monitoring, as long as the lighting power generation and monitoring are carried out in the selected time zone, the monitoring effect of the same degree as the existing technology can be obtained, and the improved method of solar module performance monitoring disclosed in the present disclosure can also prevent the reference module from being damaged. The influence of environmental factors leads to deterioration, and the electricity cost for monitoring can be saved. In addition, the measurement results in FIG. 3 are the results of measurements performed under the condition that brand new modules are used on the reference modules.

Referring to Figure 4, it will be found that when the number of days of use is extended, the existing reference module will have a significant decline in power generation efficiency. Amplitude decay, which is the result of short-term occlusion by dust or foreign matter, increases after cleaning. However, in the entire time period of the existing reference module in FIG. 4 , even after cleaning at the time point of 169 days, its power generation efficiency still has a significant gap compared with the reference module 20 of the present disclosure, which is The degradation of the module itself caused by continuous light or the drop caused by aging. From this, it can be understood that using the improved method for monitoring the performance of a solar module of the present disclosure, the life of the module can be extended to obtain a more accurate monitoring effect.

From the above, according to the improved method of solar module performance monitoring and the solar module system using the method of the present disclosure, more environmental factors can be considered to monitor the power generation performance of the solar module more accurately, and the power consumption for monitoring can be saved cost and extend module life.

Although the preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, the present disclosure is not limited to the above embodiments. Those skilled in the technical field of the present disclosure should be able to make various changes within the scope described in the patent application, and the changes certainly also belong to the technical scope of the present disclosure. For example, although in the embodiment of the present disclosure, the isolation member 30 is slidably covered on the reference module 20 , the isolation member 30 may also be fixed, and the reference module 20 is moved below the isolation member 30 to be covered. In addition, the isolation member can also be provided by flipping the cover, and the reference module can be contacted or isolated from environmental factors through the cover of the isolation member.

Claims

An improved method for solar module efficiency monitoring, characterized in that it comprises:

Steps for the continuous exposure assessment module to generate electricity from light under the environmental factors of the actual environment, and to isolate the reference module from the environmental factors;

Exposing the reference module to the environmental factor of the actual environment for a specific time period to perform photoelectric power generation;

the step of returning the reference module to a state isolated from the environmental factor after the specified time period has elapsed; and

the step of comparing the power generation of the evaluation module and the power generation of the reference module in the specific time period;

Wherein the step of isolating the reference module from the environmental factor and the step of returning the reference module to the state of isolating the reference module from the environmental factor by providing an isolation member and sliding the isolation member over the reference module to integrate with the environmental factor isolation;

The step of exposing the reference module to the environmental factor of the actual environment exposes the reference module to the actual environment by sliding the isolation member covering the reference member away.
The method for improving solar module efficiency monitoring according to claim 1, wherein the environmental factor is at least one of sunlight, dust or water.
A solar module system, characterized in that it comprises:

The evaluation module, which is a solar power generation panel, is exposed to the environmental factors of the actual environment;

a reference module, which is a solar power generation panel, arranged in such a way as to isolate the environmental factors; and

A control unit, which uses the improved method for monitoring the efficiency of solar modules according to claim 1 or 2 to monitor the power generation of the solar module system.
The solar module system according to claim 3 , wherein the control part transmits the power generation of the evaluation module and the reference module or the result of the comparison of the power generation by wired or wireless means.