Circuit conversion structure in PID recovery device of solar power station

Abstract

The invention discloses a circuit conversion structure in a PID recovery device of a solar power station. The circuit conversion structure comprises an insulation detection module and the PID recoverydevice, wherein the PID recovery device comprises a power supply module, a relay device and a control module, a grounding port of the insulation detection module is conductively connected with the relay device, the relay device is conductively connected with the ground, a positive port and a negative port of the insulation detection module are conductively connected with a positive electrode anda negative electrode of direct current respectively, a positive port of the power module is conductively connected with a positive electrode of the direct current, a negative port of the power moduleis conductively connected with the ground, and the control module is conductively connected with the power module. The circuit conversion structure is advantaged in that defects in the prior art are overcome, when the PID recovery device works, an insulation detection device is disconnected, the insulation condition of the power station system is monitored by the PID recovery device, when the PIDrecovery device stops working, the insulation detection device is connected, and the insulation detection module works normally, so the PID recovery effect is achieved, and the normal effect of the insulation detection function and the normal work of the inverter are not influenced.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to a circuit conversion structure in a PID restoration device of a solar power station. Background technique [0002] The PID phenomenon of solar power plants is the attenuation of power generation of solar cell modules during outdoor applications. The PID phenomenon of solar power plants can be alleviated and solved from the perspectives of battery technology, module technology, and system structure. [0003] Under normal circumstances, the inverter detects the insulation condition some time before starting up, and starts to work if it meets the requirements. There are also some inverters with an insulation detection module installed inside, and the insulation detection module is connected with the positive and negative poles of the DC and the ground. When the PID recovery device and the DC detection module work at the same time, even if there is no actual i...

AI Technical Summary

Problems solved by technology

When the PID recovery device and the DC detection module work at the same time, even if there is no actual insulation problem, the inverter will display an alarm state, which will affect the normal startup during the day

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