Photovoltaic fault diagnosis system and diagnosis method based on theoretical calculation and data analysis

Abstract

The invention discloses a photovoltaic fault diagnosis system and method based on theoretical calculation and data analysis. The diagnosis system comprises a data acquisition sub system, a data storage sub system, a data mining sub system, a system modeling prediction sub system, a fault decision-making sub system and a fault display feedback sub system. According to the photovoltaic fault diagnosis system and method based on theoretical calculation and data analysis, starting from the perspective of a whole electric field, the operation conditions of all unit equipment in the electric field are analyzed, and the operation conductions of all the unit equipment are judged in real time in combination with the predicted value of a system model; meanwhile, the fault decision-making system makes the fault diagnosis system have the autonomous leaning function through an intelligent algorithm, and the fault judgment accuracy of the system can be increased continuously; meanwhile, the photovoltaic fault diagnosis system can store the electric field real-time data, electric field external environment data, unit model prediction data, fault source and other data in real time, and the system is made to have the fault retrospection function; the electric field operation safety level is increased, and the electric field power quality is improved.

Description

technical field [0001] The invention belongs to the field of photovoltaic fault diagnosis systems, and in particular relates to a photovoltaic fault diagnosis system and a diagnosis method based on theoretical calculation and data analysis. Background technique [0002] With the development of social production, the demand for energy continues to increase, and the global energy crisis has become increasingly prominent. Together with the background of increasingly severe environmental pressure, solar photovoltaic power generation has gradually shifted from special applications to civilian use, from auxiliary energy to basic The energy transition and the emergence of photovoltaic grid-connected systems make the application prospects of solar power generation brighter. There are a large number of phalanx equipment in the photovoltaic power station system, which covers a large area. Problems such as the harsh natural environment and living environment lead to a high failure rate...

AI Technical Summary

Problems solved by technology

However, the abnormality or failure of a single photovoltaic panel array or inverter cannot accurately represent the changes in the power quality of the entire electric field.

At the same time, the existing photovoltaic fault diagnosis system still has the disadvantages of low fault judgment accuracy and poor real-time performance.

It cannot meet the requirements of real-time monitoring of all unit equipment in the electric field, judgment of faults, and provision of accurate solutions

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