Alternating current filter capacitor anomaly detection device

Abstract

The invention relates to an AC filter capacitor abnormity detection device. The AC filter capacitor abnormity detection device comprises a power supply, a boost element, an impedor and a detection assembly. The power supply is connected with the boosting element, the boosting element is connected with the impedor, the impedor is used for being connected with a capacitor bank to be overhauled, and under the condition that the impedor is connected with the capacitor bank, the boosting element, the impedor and the capacitor bank form a resonance circuit; the boosting element is used for boosting the output voltage of the power supply, and the resonant circuit is used for secondarily boosting the voltage output by the boosting element so as to apply the secondarily boosted voltage to the capacitor bank; the detection assembly obtains the electric power parameters of the capacitor bank and calculates the capacitance value of each capacitor in the capacitor bank according to the electric power parameters. The frequency can be adjusted, and the test voltage can be boosted to the voltage environment of the to-be-overhauled capacitor bank in practical application by using the boosting assembly and the impedor, so that the accuracy of capacitance calculation of each capacitor in the capacitor bank is ensured.

Description

technical field [0001] The present application relates to the technical field of power systems, in particular to an abnormality detection device for AC filter capacitors. Background technique [0002] With the continuous development of the power system, the working pressure of the converter station is gradually increasing. Therefore, the relevant components in the converter station need to be frequently maintained, repaired and inspected to maintain the normal operation of the converter station. Among them, the AC filter capacitor bank in the converter station increases with the operation years, and the insulation aging of the internal components of the capacitor will cause the capacitance of the capacitor to change. A change in the capacitance of a single capacitor will cause an imbalance in the capacitance of the bridge arms in the capacitor bank. Therefore, it is particularly important to detect the capacitance of each bridge arm in the capacitor bank. However, the exi...

AI Technical Summary

Problems solved by technology

However, the existing method for detecting the bridge arm capacitance in the AC filter capacitor bank in the converter station has the problem of inaccurate test results

Images