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Fault diagnosis and monitoring system of active power filter

Published:2015-06-10 author:MA Li-xin，ZHANG Hai-bing，ZHOU Lei Browse: 3213 Check PDF documents

Fault diagnosis and monitoring system of active power filter

MA Li-xin，ZHANG Hai-bing，ZHOU Lei

（chool of Optical-Electrical and Computer Engineering，University of Shanghai for Science &Technology，

Shanghai 200093，China）

Abstract：Aiming at the problems that IGBT and its driver in the main circuit of the active power filter（APF）is easy to cause opencircuit

fault，and how to use the virtual instrument technology to replace the traditional power quality analysis device for real-time

monitoring on APF，through the analysis of the open-circuit fault of IGBT in APF，the hardware circuit on fault diagnosis was designed

accordingly. At the same time，the hardware circuit monitoring the sampling signal of grid current and APF operating temperature was

designed. The operatinging principle of circuit was analysised and defined. The real-time monitoring system based on LabVIEW was

designed，the sampling data was sent to the monitoring system，and the real-time monitoring function of APF operation using hostcomputer

was achieved. Finally，the real-time sampling of the grid voltage and harmonic current signal，and the simulated test of opencircuit

fault in IGBT were proceeded. The results indicate that the system can realize the real-time monitoring of the running state of

APF，and can achieve the fault diagnosis function of IGBT and its driver，which has high accuracy and quick response.

Key words：active power filter（APF）；real-time monitoring；fault diagnosis；LabVIEW

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