Method and system for monitoring performance and identifying faults of array of photovoltaic assembly

Abstract

The invention provides a method and system for monitoring array performance and identifying faults of a photovoltaic assembly. The system includes a data aggregation and storage unit, a photovoltaic array performance recession monitoring unit and a photovoltaic assembly fault identifying and positioning unit. The method includes the following steps: S1. acquiring operation condition parameters and operation performance parameters of the photovoltaic array assembly, the operation condition parameters including environment temperature and radiation illumination, the operation performance parameters include assembly working temperature, working current and voltage; S2. real-time monitoring performance recession of the photovoltaic array assembly; S3. establishing a fault identification knowledge database, and realizing fault identification and positioning of the photovoltaic array assembly. According to the invention, the method and system, through wireless signal acquisition, transmission and data analysis, can realize real-time monitoring of performance recession state of the photovoltaic assembly, and determine fault types and fault positions through fault identification, and provide support for remote intelligent operation and maintenance of a solar power station system.

Description

technical field [0001] The invention belongs to the technical field of solar photovoltaic power generation, and in particular relates to a method and system for performance monitoring and fault identification of a photovoltaic module array. Background technique [0002] As a sustainable and clean energy, solar photovoltaic power generation has developed rapidly in recent years. As of the end of 2015, my country's installed capacity of solar photovoltaic power generation reached 43GW. A large number of photovoltaic power plants put into operation put forward higher requirements for operation and maintenance. The key to improving the operation and maintenance level is to realize the status monitoring and fault identification of solar photovoltaic power plants. [0003] The existing photovoltaic power plant monitoring technologies mainly include simple visual inspection method, thermal imaging method and method based on electrical parameter measurement. The latter is widely ...

AI Technical Summary

Problems solved by technology

However, due to the great differences in the working characteristics of each module string in the photovoltaic array, it is difficult to use a single standard to determine the working status of the module string; in addition, this method can only judge the working status of the module string, and cannot achieve accurate fault diagnosis. Positioning, so it cannot meet th...

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