Method and device for monitoring leakage current of solar photovoltaic inverter

Abstract

The invention discloses a method for monitoring leakage current of a solar photovoltaic inverter. The method comprises the following steps: acquiring and sending initial parameter information of the solar photovoltaic inverter; setting an electric leakage early warning value; establishing a monitoring model; collecting the phase and frequency of alternating current output by the solar photovoltaic inverter to obtain a vibration period; collecting and sending current data of the solar photovoltaic inverter; performing filtering and denoising processing on the current data to obtain target current data; performing direct current removal processing on the target current data, and removing a direct current component in the target current data to obtain real-time target detection data; importing real-time target detection data into the monitoring model, and generating and sending a comparison result; and generating and sending electric leakage monitoring information. The invention further discloses a device for monitoring the leakage current of the solar photovoltaic inverter. According to the invention, the electric leakage condition of the inverter can be accurately monitored in real time, the operation safety of the inverter is ensured, and the safety and stability of solar photovoltaic power generation are further ensured.

Description

technical field [0001] The invention relates to the technical field of safe electricity monitoring, in particular to a method and device for monitoring the leakage current of a solar photovoltaic inverter. Background technique [0002] Energy is the material basis for the existence and development of human society, and the increasingly serious energy shortage and environmental degradation are global issues involving human survival and development. Renewable energy is a clean energy that can be recycled and is the hope of the future energy system. Photovoltaic inverter power generation occupies an increasingly important position in the field of solar energy applications. In recent years, the photovoltaic industry has developed rapidly, and power electronic equipment is one of the basic equipment in the photovoltaic industry. Research on the operating characteristics of power electronic equipment has become an important direction. The inverter is the core device of solar powe...

AI Technical Summary

Problems solved by technology

During the working process of the inverter, leakage problems are prone to occur, which will affect its operation safety and lead to failures in the process of solar power generation

[0003] The existing inverter leakage current monitoring method uses a leakage current sensor for detection, but the leakage current sensor is easily disturbed, the detection is inaccurate, and it is impossible to monitor the leakage current of the inverter in a timely, effective and accurate manner.

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