Wind power converter capacitor service life test device and test method thereof

Abstract

The invention discloses a wind power converter capacitor service life test device. The wind power converter capacitor service life test device is characterized in that discharge circuits connected with the two ends of a converter capacitor are included, current sensors are connected to the discharge circuits, voltage sensors are connected with the two ends of the converter capacitor, and the current sensors and the voltage sensors are respectively connected with a calculation unit. The invention further discloses a test method of the wind power converter capacitor service life test device. According to the wind power converter capacitor service life test device and the test method of the wind power converter capacitor service life test device, the capacity change of the converter direct-current supporting capacitor can be conveniently detected, the aging condition of the capacitor is judged, maintenance reference information is provided in time, and fault expansion is prevented.

Description

technical field [0001] The invention relates to a capacitor life testing device, in particular to a wind power converter capacitor life testing device, and also relates to a testing method based on the wind power converter capacitor life testing device, which belongs to the technical field of power electronics. Background technique [0002] In recent years, wind power generation technology has developed rapidly around the world. As the core energy conversion equipment of wind turbines, wind power converters have attracted increasing attention to their safety and stability. Wind power converters generally adopt the "AC-DC-AC" topology, so the intermediate DC link requires a large number of capacitors to filter to obtain a stable DC voltage, and the most widely used types of DC support capacitors today are aluminum electrolytic capacitors or metal film capacitors. Due to the volatilization of the electrolyte, the loss of the anode and cathode foils of the aluminum electrolytic...

AI Technical Summary

Problems solved by technology

On the one hand, the decrease in the capacitance value of the capacitor may affect the control performance of the equipment, on the other hand, it will further increase the heat loss of the capacitor, accelerate the aging of the capacitor, and cause more serious failures

Since the service life of the capacitor has a lot to do with the natural environment in which the equipment is located and the working conditions of the equipment itself, it is difficult to predict whether the capacitor has experienced serious aging. It is often necessary to wait until the equipment fails seriously, which affects the wind turbine. The safe production is not conducive to the maintenance of the converter, which has brought certain economic losses

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