Photovoltaic power station integrated system power generation efficiency evaluation system, evaluation method and application

Abstract

The invention discloses a photovoltaic power station integrated system power generation efficiency evaluation system, an evaluation method and application, and relates to the technical field of photovoltaic power generation. The photovoltaic power station integrated system power generation efficiency evaluation system comprises a power generation quantity statistics module which is used for performing real-time statistics on power generation quantity generated by a photovoltaic power station in a specific time period; the generated power calculation module is used for calculating the generated power of the photovoltaic power station in real time; and the sunshine duration counting module is used for counting the peak sunshine duration in a specific time period in real time. According to the evaluation method of the evaluation system, the power generation efficiency of the photovoltaic power station integrated system is evaluated by calculating the system efficiency PR value; the PR value can be calculated through the following formula: # imgabs0 #. The evaluation system is applied to the technical field of photovoltaic power generation. According to the invention, a PR value is calculated through a generating capacity statistics module, a generated power calculation module and a sunshine duration statistics module; and when an abnormality occurs, a reason can be quickly found to ensure the power generation efficiency of the photovoltaic power station.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic power generation technology, and in particular to a photovoltaic power station integrated system power generation efficiency evaluation system, evaluation method and application. Background Art

[0002] Photovoltaic power generation is an important way for humans to obtain electricity from nature. Among them, the photovoltaic power station integrated system is currently a systematic power generation facility. Due to the complexity of the photovoltaic power station integrated system, it is necessary to develop a photovoltaic power station integrated system power generation efficiency evaluation system to conduct real-time evaluation of its power generation efficiency and improve its power generation efficiency in a timely and targeted manner.

[0003] It is very necessary to evaluate the power generation efficiency of the integrated system of photovoltaic power plants for the following reasons:

[0004] Economic evaluation: Understand whether the photovoltaic power station has achieved the expected return on investment and evaluate the economic benefits of the power station. Through efficiency evaluation, it can be determined whether the power station can recover its costs within a reasonable time and bring profits.

[0005] Performance monitoring: Monitor the health of the power plant to ensure that it is always in optimal operating condition. By regularly evaluating the power generation efficiency, problems or faults in the system, such as damaged components and loose connections, can be discovered in time, and measures can be taken to repair them.

[0006] Operation optimization: Based on the data feedback on power generation efficiency, the power plant operation strategy is adjusted, such as optimizing the arrangement of components, improving cleaning and maintenance plans, etc., so as to improve the overall power generation efficiency.

[0007] Technology improvement: Provide a basis for improving existing technologies or selecting new technologies. By comparing the efficiency of different technical solutions, more efficient solutions can be selected to promote technological innovation.

[0008] Environmental adaptability: Check whether the photovoltaic power station is suitable for local natural conditions, such as light resources, climate characteristics, etc. The evaluation of power generation efficiency helps to determine whether the design of the power station fully considers the regional characteristics.

[0009] In short, evaluating the power generation efficiency of the photovoltaic power plant integrated system is not only crucial for the power plant owner, but also plays an important role in promoting the healthy development of the entire industry. Through continuous evaluation and optimization, it can ensure that the photovoltaic power plant can contribute clean energy in a long-term and stable manner while maximizing economic benefits. Summary of the invention

[0010] In order to solve at least one of the above technical problems, a system capable of detecting the power generation efficiency of a photovoltaic power station integrated system in real time is developed. The present application provides a photovoltaic power station integrated system power generation efficiency evaluation system, evaluation method and application.

[0011] On the one hand, the present application provides a photovoltaic power station integrated system power generation efficiency evaluation system, comprising:

[0012] The power generation statistics module is used to count the power generation of the photovoltaic power station in a specific time period in real time;

[0013] Power generation calculation module, used to calculate the power generation of the photovoltaic power station in real time;

[0014] And the sunshine time statistics module is used to count the peak sunshine hours in a specific time period in real time.

[0015] Optionally, the photovoltaic power station integrated system power generation efficiency evaluation system of the present application also includes a photovoltaic component attenuation detection module for real-time calculation of the attenuation rate of the photovoltaic component relative to the initial installation.

[0016] Optionally, the photovoltaic power station integrated system power generation efficiency evaluation system of the present application also includes an inverter efficiency monitoring module for real-time monitoring of the conversion efficiency of the inverter.

[0017] In the second aspect, the present application provides an evaluation method for the above photovoltaic power station integrated system power generation efficiency evaluation system, which evaluates the power generation efficiency of the photovoltaic power station integrated system by calculating the system efficiency PR value; the PR value can be calculated by the following formula:

[0018]

[0019] in:

[0020] E out : The amount of electricity generated by a photovoltaic power plant during a specific period of time, in kWh;

[0021] P0: Rated power of the PV power station under standard conditions, in kWp;

[0022] h T : The peak sunshine hours on the photovoltaic array surface of the photovoltaic power station in a specific time period, in h;

[0023] G i,ref : Define the reference light intensity of P0, the unit is 1kW / m 2 ;

[0024] Optionally, the E out It is obtained through the power generation statistics module in the photovoltaic power station comprehensive system power generation efficiency evaluation system.

[0025] Optionally, the P0 is calculated by a power generation calculation module in a photovoltaic power station integrated system power generation efficiency evaluation system.

[0026] Optionally, the hT It is calculated through the sunshine time statistics module in the photovoltaic power station comprehensive system power generation efficiency evaluation system.

[0027] On the third aspect, the present application provides the application of the above-mentioned photovoltaic power station comprehensive system power generation efficiency evaluation system in the field of photovoltaic power generation technology.

[0028] To summarize, this application designs a power generation statistics module for real-time statistics of the power generation generated by the photovoltaic power station within a specific time period; designs a power generation calculation module for real-time calculation of the power generation of the photovoltaic power station; designs a sunshine time statistics module for real-time statistics of the peak sunshine hours within a specific time period; to calculate the system efficiency PR value in real time; evaluates the power generation efficiency of the comprehensive system of the photovoltaic power station through the system efficiency PR value, comprehensively judges the power generation efficiency and economic benefits of the photovoltaic power station, and can easily and quickly find the corresponding cause when the power generation efficiency is abnormal, so as to carry out maintenance and ensure the power generation efficiency of the photovoltaic power station. DETAILED DESCRIPTION

[0029] The present application is further described in detail below with reference to the embodiments.

[0030] Example 1

[0031] The present embodiment provides a photovoltaic power station integrated system power generation efficiency evaluation system, which includes a power generation statistical module, a power generation power calculation module and a sunshine time statistical module.

[0032] The power generation statistics module is used to count the power generation of the photovoltaic power station in a specific time period in real time.

[0033] The power generation calculation module is used to calculate the power generation of the photovoltaic power station in real time.

[0034] The sunshine time statistics module is used to count the peak sunshine hours in a specific time period in real time.

[0035] Example 2

[0036] The present embodiment provides a photovoltaic power station integrated system power generation efficiency evaluation system, which includes a power generation statistical module, a power generation power calculation module, a sunshine time statistical module and a photovoltaic component attenuation detection module.

[0037] The power generation statistics module is used to count the power generation of the photovoltaic power station in a specific time period in real time.

[0038] The power generation calculation module is used to calculate the power generation of the photovoltaic power station in real time.

[0039] The sunshine time statistics module is used to count the peak sunshine hours in a specific time period in real time.

[0040] The photovoltaic module attenuation detection module is used to calculate the attenuation rate of the photovoltaic module relative to the initial installation in real time.

[0041] Example 3

[0042] The present embodiment provides a photovoltaic power station integrated system power generation efficiency evaluation system, which includes a power generation statistical module, a power generation power calculation module, a sunshine time statistical module and an inverter efficiency monitoring module.

[0043] The power generation statistics module is used to count the power generation of the photovoltaic power station in a specific time period in real time.

[0044] The power generation calculation module is used to calculate the power generation of the photovoltaic power station in real time.

[0045] The sunshine time statistics module is used to count the peak sunshine hours in a specific time period in real time.

[0046] The inverter efficiency monitoring module is used to monitor the conversion efficiency of the inverter in real time.

[0047] Example 4

[0048] Based on Example 1, this embodiment provides an evaluation method for the above photovoltaic power station integrated system power generation efficiency evaluation system, and evaluates the power generation efficiency of the photovoltaic power station integrated system by calculating the system efficiency PR value; the PR value can be calculated by the following formula:

[0049]

[0050] in:

[0051] E out : The amount of electricity generated by a photovoltaic power plant during a specific period of time, in kWh;

[0052] P0: Rated power of the PV power station under standard conditions, in kWp;

[0053] h T : The peak sunshine hours on the photovoltaic array surface of the photovoltaic power station in a specific time period, in h;

[0054] G i,ref : Define the reference light intensity of P0, the unit is 1kW / m 2 ;

[0055] Among them, E out It is obtained through the power generation statistics module in the photovoltaic power station comprehensive system power generation efficiency evaluation system.

[0056] Among them, P0 is calculated by the power generation calculation module in the photovoltaic power station comprehensive system power generation efficiency evaluation system.

[0057] Among them, h T It is calculated through the sunshine time statistics module in the photovoltaic power station comprehensive system power generation efficiency evaluation system.

[0058] Example 5

[0059] This embodiment provides an evaluation method for the above photovoltaic power station integrated system power generation efficiency evaluation system based on embodiment 2, and evaluates the power generation efficiency of the photovoltaic power station integrated system by calculating the system efficiency PR value; the PR value can be calculated by the following formula:

[0060]

[0061] in:

[0062] E out : The amount of electricity generated by a photovoltaic power plant during a specific period of time, in kWh;

[0063] P0: Rated power of the PV power station under standard conditions, in kWp;

[0064] h T : The peak sunshine hours on the photovoltaic array surface of the photovoltaic power station in a specific time period, in h;

[0065] G i,ref : Define the reference light intensity of P0, the unit is 1kW / m2;

[0066] Among them, E out It is obtained through the power generation statistics module in the photovoltaic power station comprehensive system power generation efficiency evaluation system.

[0067] Among them, P0 is calculated by the power generation calculation module in the photovoltaic power station comprehensive system power generation efficiency evaluation system.

[0068] Among them, h T It is calculated through the sunshine time statistics module in the photovoltaic power station comprehensive system power generation efficiency evaluation system.

[0069] In addition, this embodiment also uses the photovoltaic module attenuation detection module to calculate in real time the attenuation rate of the photovoltaic module relative to the initial installation. The attenuation rate of the photovoltaic module under normal conditions is 3% in the first year. For each additional year thereafter, the attenuation rate increases by 0.2% relative to the attenuation rate of the first year.

[0070] This embodiment comprehensively evaluates the power generation efficiency of the photovoltaic power station system by calculating the system efficiency PR value and the real-time attenuation rate of the photovoltaic modules. It can also determine the proportion of power generation efficiency reduction caused by the attenuation of the photovoltaic modules. If it exceeds the theoretical proportion, a special inspection of the photovoltaic modules is required.

[0071] Example 6

[0072] This embodiment provides an evaluation method for the above photovoltaic power station integrated system power generation efficiency evaluation system based on embodiment 3, and evaluates the power generation efficiency of the photovoltaic power station integrated system by calculating the system efficiency PR value; the PR value can be calculated by the following formula:

[0073]

[0074] in:

[0075] E out : The amount of electricity generated by a photovoltaic power plant during a specific period of time, in kWh;

[0076] P0: Rated power of the PV power station under standard conditions, in kWp;

[0077] h T : The peak sunshine hours on the photovoltaic array surface of the photovoltaic power station in a specific time period, in h;

[0078] G i,ref : Define the reference light intensity of P0, the unit is 1kW / m2;

[0079] Among them, E out It is obtained through the power generation statistics module in the photovoltaic power station comprehensive system power generation efficiency evaluation system.

[0080] Among them, P0 is calculated by the power generation calculation module in the photovoltaic power station comprehensive system power generation efficiency evaluation system.

[0081] Among them, h T It is calculated through the sunshine time statistics module in the photovoltaic power station comprehensive system power generation efficiency evaluation system.

[0082] In addition, this embodiment also monitors the conversion efficiency of the inverter in real time through the inverter efficiency monitoring module.

[0083] This embodiment comprehensively evaluates the power generation efficiency of the photovoltaic power station system by calculating the system efficiency PR value and monitoring the conversion efficiency of the inverter. It can also determine the impact of the inverter performance reduction on the power generation efficiency reduction. If it exceeds the theoretical ratio, a special inspection of the inverter is required.

[0084] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A photovoltaic power station integrated system power generation efficiency evaluation system, characterized in that: include: The power generation statistics module is used to count the power generation of the photovoltaic power station in a specific time period in real time; Power generation calculation module, used to calculate the power generation of the photovoltaic power station in real time; And the sunshine time statistics module is used to count the peak sunshine hours in a specific time period in real time.

2. The photovoltaic power station integrated system power generation efficiency evaluation system according to claim 1, characterized in that: It also includes a photovoltaic component attenuation detection module for calculating in real time the attenuation rate of the photovoltaic component relative to the initial installation.

3. The photovoltaic power station integrated system power generation efficiency evaluation system according to claim 1, characterized in that: It also includes an inverter efficiency monitoring module for real-time monitoring of the inverter conversion efficiency.

4. An evaluation method for the photovoltaic power station integrated system power generation efficiency evaluation system according to claim 1, characterized in that: The power generation efficiency of the photovoltaic power station comprehensive system is evaluated by calculating the system efficiency PR value; the PR value can be calculated using the following formula: in: E out : The amount of electricity generated by a photovoltaic power plant during a specific period of time, in kWh; P0: Rated power of the PV power station under standard conditions, in kWp; h T : The peak sunshine hours on the photovoltaic array surface of the photovoltaic power station in a specific time period, in h; G i,ref : Define the reference light intensity of P0, the unit is 1kW / m 2 .

5. The evaluation method of the photovoltaic power station integrated system power generation efficiency evaluation system according to claim 4, characterized in that: The E out It is obtained through the power generation statistics module in the photovoltaic power station comprehensive system power generation efficiency evaluation system.

6. The evaluation method of the photovoltaic power station integrated system power generation efficiency evaluation system according to claim 4, characterized in that: The P0 is calculated by a power generation calculation module in a photovoltaic power station integrated system power generation efficiency evaluation system.

7. The evaluation method of the photovoltaic power station integrated system power generation efficiency evaluation system according to claim 4, characterized in that: The h T It is calculated through the sunshine time statistics module in the photovoltaic power station comprehensive system power generation efficiency evaluation system.

8. An application of the photovoltaic power station integrated system power generation efficiency evaluation system as described in claim 1 in the field of photovoltaic power generation technology.

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