A Photovoltaic Power Generation Fault Diagnosis System Based on Photovoltaic Physical Model

Abstract

The invention relates to a photovoltaic power generation fault diagnosis system based on a photovoltaic physical model. The photovoltaic power generation fault diagnosis system is connected with a photovoltaic system to be monitored. The photovoltaic power generation fault diagnosis system comprises an environmental parameter collection device, a photovoltaic system parameter collection device, a signal converter and a fault diagnosis subsystem. When the photovoltaic system operates, the environmental parameter collection device collects photovoltaic system environmental parameters every a preset time, and the photovoltaic system environmental parameters are transmitted to the fault diagnosis subsystem after being converted by the signal converter; meanwhile, the photovoltaic system parameter collection device collects photovoltaic system parameters every a preset time, and the photovoltaic system parameters are transmitted to the fault diagnosis subsystem after being converted by the signal converter; the fault diagnosis subsystem carries out calculation and fault condition judgment according to the acquired parameters and outputs results. Compared with the prior art, the photovoltaic power generation fault diagnosis system has the advantages of being small in number of needed calculating parameters, simple in wire layout and reconstruction, low in cost and the like, and achieves safe and reliable monitoring and fault diagnosis on the photovoltaic system.

Description

technical field [0001] The invention relates to the field of new energy control, in particular to a photovoltaic power generation fault diagnosis system based on photovoltaic physical models and energy loss analysis. Background technique [0002] Since the beginning of the new century, solar photovoltaic power generation, as a renewable and clean energy source, has become a research hotspot in various countries under the low-carbon trend. Large and small photovoltaic power generation systems are considered to be one of the most promising forms of renewable energy. During the operation of the photovoltaic system, there are many factors that will cause the output of the photovoltaic system to be lower than the normal value, such as aging of system components, failure of system components, dust accumulation or shading, etc. If the faults in the above operating states can be diagnosed and alarmed accordingly, and then the corresponding faults can be eliminated, the energy loss ...

AI Technical Summary

Problems solved by technology

However, insufficient test data will basically make fault diagnosis impossible, and too much test data will put forward requirements for the type and quantity of test instruments, thereby increasing system complexity and cost

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