Fault detection device, method and system for filter of generating set

Abstract

The invention provides a fault detection device, method and system for a filter of a generator set, the device includes: at least one fault detection circuit, at least one fault detection circuit is coupled with the filter circuit of the filter; each fault detection circuit The circuit includes: a detection circuit and a signal processing module; a detection circuit for detecting the current signal flowing through the filter circuit and sending the current signal to the signal processing module; a signal processing module for detecting that the current signal is an AC switch current signal In the case of , output the first signal indicating that the filter circuit is in the open state to the converter in the generator set, and output the second signal indicating that the filter circuit is in the open state to the converter when the current signal is detected to be zero . The embodiment of the present invention can realize the real-time detection of the working state of the filter of the generator set, real-time protection and timely maintenance of the generator and the converter of the generator set.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a fault detection device, method and system for a filter of a generating set. Background technique [0002] In the field of wind power generation, the converters of high-power wind turbines are controlled by DC / AC (Pulse Width Modulation, hereinafter referred to as PWM) inverter, and through the converter and power generation Install an LRC filter between the generators or install a first-order RC filter at the generator end to suppress the voltage rise rate (DU / DT) of the PWM wave, thereby weakening the damped oscillation at the generator end and reducing the voltage value at the generator end to play a role Protection of converters and generators. However, if the above-mentioned LRC filter or first-order RC filter fails and fails, it will cause damped oscillation and overvoltage problems at the generator end, which will lead to generator insulation failure and damage. In ...

AI Technical Summary

Problems solved by technology

However, if the above-mentioned LRC filter or first-order RC filter fails and fails, it will cause damped oscillation and overvoltage problems at the generator end, which will cause generator insulation failure and damage

In the field of wind power generation, since neither the LRC filter nor the first-order RC filter is equipped with a fault detection device, the working status of the filter cannot be detected in real time, and the generator and converter in the generator set cannot be protected and monitored in real time. timely maintenance

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