XIAO LIANG~1, CHEN LEI~2. Fault Diagnosis of ASVG Main Circuit Based on DC Side Current Detection. [J]. Power capacitor & reactive power compensation, 2013, 34(1): 80-83.
XIAO LIANG~1, CHEN LEI~2. Fault Diagnosis of ASVG Main Circuit Based on DC Side Current Detection. [J]. Power capacitor & reactive power compensation, 2013, 34(1): 80-83. DOI: 10.14044/j.1674-1757.pcrpc.2013.01.003.
The ASVG main circuit consisting of power electronic elements is a weak link with prone to fault and
in case of open circuit fault
is not easily observed.In this paper
the fault conditions are classified through analyzing the variation of frequency spectrum of DC side current of main circuit in normal condition
one transistor open and two-phase two transistors open condition by the use of switching functions FFT.The fault is located through the average value of three-phase output current. The correctness of theoretical analysis and validity of the method are verified by MATLAB simulation.