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Performance evaluation system and method of photovoltaic system

A photovoltaic system and evaluation system technology, applied in photovoltaic system monitoring, photovoltaic power generation, photovoltaic modules, etc., can solve problems such as reducing investor returns, lack of accurate and reliable performance evaluation and analysis methods, and inability to ensure the best state of the system.

Inactive Publication Date: 2015-11-04
HOHAI UNIV CHANGZHOU
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Problems solved by technology

In addition, there is no accurate and reliable performance evaluation and analysis method. After a period of operation, it is impossible to guarantee that the system can continue to work in the best state, which reduces the return on investors.

Method used

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  • Performance evaluation system and method of photovoltaic system
  • Performance evaluation system and method of photovoltaic system
  • Performance evaluation system and method of photovoltaic system

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Embodiment Construction

[0034] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0035] A photovoltaic system performance evaluation system, the system includes a data acquisition module and a performance evaluation module; the data acquisition module is used for the collection, transmission, storage, and display functions of various monitoring data, and the collected data are meteorological data, photovoltaic array DC The data communicates with the inverter; then it is sent to the microprocessor for preprocessing, and then sent to the remote computer through the serial port or other communication interface, and the computer screens, stores and displays the data.

[0036] The performance evaluation module uses principal component analysis to extract the main factors affecting system performance, including photovoltaic array per...

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Abstract

The invention discloses a performance evaluation system and method of a photovoltaic system. The system comprises a data acquisition module and a performance evaluation unit. With utilization of direct-current data, alternating-current data, and meteorological data collected by the data acquisition module, normal working data and to-be-tested data form samples; standardization is carried out and a mahalanobis distance is used as a performance evaluation index to carry out direct-current power evaluation; a similarity level CV value of evaluation done twice is calculated; if the CV is larger than 0.8 and is less than 1 or is larger than 0.6 and is less than 0.8, the system performance is indicated to be good and then new round evaluation is carried out; and if the CV is larger than 0 and is less than 0.6, the system performance is indicated to be poor, a main factor influencing the system performance is extracted by using a principal component analysis method, and the photovoltaic array performance, assembling aging, and inverter performance are analyzed, and then the analysis result is displayed on an upper computer interface. According to the invention, the implementation process is simple and is easy to do; the photovoltaic system performance can be analyzed timely; the working state of the photovoltaic system can be gotten accurately; and the stability and reliability of the system are improved.

Description

technical field [0001] The invention relates to the field of photovoltaic power generation, in particular to a photovoltaic system performance evaluation system and method. Background technique [0002] With the rapid development of distributed photovoltaic systems, the number of power stations that have been built or are under construction in the country is increasing day by day, but problems in the operation process are also emerging, and the corresponding data monitoring system and supporting facilities are not perfect. In addition, there is no accurate and reliable performance evaluation and analysis method. After a period of operation, it is impossible to guarantee that the system can continue to work in the best state, which reduces the return on investors. In addition, many distributed photovoltaic systems are generally installed on the roofs of urban buildings. Once the installation is completed, it is difficult to perform manual inspection and daily maintenance like...

Claims

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Application Information

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IPC IPC(8): H02S50/00
CPCY02E10/50
Inventor 丁坤冯莉陈富东顾鸿烨李元良覃思宇高列刘振飞
Owner HOHAI UNIV CHANGZHOU
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