Abnormal photovoltaic string branch identification method and device, electronic equipment and storage medium

Abstract

The invention relates to the technical field of photovoltaic power generation, and provides an abnormal photovoltaic string branch identification method and device, electronic equipment and a storage medium. The method comprises the steps of calculating a first dispersion rate of each inverter in a photovoltaic system according to a preset calculation period, and screening out abnormal inverters of which the first dispersion rates are greater than a preset dispersion threshold value; screening each photovoltaic string branch connected with the same abnormal inverter so as to determine a first photovoltaic string branch with the minimum output power; calculating a second dispersion rate of the abnormal inverter after the first photovoltaic string branch is removed; and when the second dispersion rate is smaller than or equal to a preset dispersion threshold value, determining that the first photovoltaic string branch is an abnormal photovoltaic string branch, thereby being capable of timely and accurately identifying the abnormally operating photovoltaic string device in the system, being high in identification efficiency, effectively reducing energy waste caused by the fault of the photovoltaic string device, and improving the reliability of the system. And the power generation income of enterprises can be improved.

Description

technical field [0001] The present disclosure relates to the technical field of photovoltaic power generation, and in particular to a method, device, electronic equipment and storage medium for identifying an abnormal photovoltaic string branch. Background technique [0002] Distributed photovoltaic power station refers to a power generation system that uses distributed resources and has a small installed capacity and is arranged near the user. It is a new divergence and comprehensive utilization of energy with broad prospects. [0003] Photovoltaic string equipment is the key equipment for converting light energy (solar energy) into electrical energy. The normal operation of the photovoltaic string equipment will directly affect the normal power generation of the distributed photovoltaic system. Therefore, it is necessary to monitor the operating status of the photovoltaic string equipment of the distributed photovoltaic system in real time to ensure that the system can g...

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Problems solved by technology

[0005] In view of this, the embodiments of the present disclosure provide a method, device, electronic equipment, and storage medium for identifying abnormal photovoltaic string branches to solve the problem of time-consuming manual identification of abnormal photovoltaic string branches in the photovoltaic system in the prior art. , laborious, high cost, and prone to missed and wrong detection due to human factors, making it difficult to identify abnormally operating photovoltaic string equipment in the system in a timely and accurate manner, which in turn easily leads to energy losses caused by photovoltaic string equipment failures. Waste, and reduce the power generation income of the enterprise

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