Identifying method of dragging power supply system harmonic wave resonant frequency

• Main Authors: XIONG CHENGLIN, FENG XIAOYUN, CUI HENGBIN, GE XINGLAI, SONG WENSHENG, WANG QINGYUAN
• Format: Patent
• Language: Chinese; English
• Published: 11.09.2013
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention relates to an identifying method of dragging power supply system harmonic wave resonant frequency. The method includes the steps of collecting net voltages, used for dragging or baking a running train, in a dragging power supplying system and all four-quadrant converter alternating current side voltages of the train; after the collected data are preprocessed, using an FTF method to calculate the net voltages, all the four-quadrant converter alternating current side voltages and each sub-harmonic component amplitude; for odd sub-harmonics, calculating a harmonic gain coefficient, and according to a relation curve of the harmonic gain coefficient and frequency, identifying the harmonic resonance frequency. The method not only can be used for guiding model selection of a train which is newly input in a railway and avoid occurrence of highly-harmful resonance, but also can be used for testing and detecting the train and identifying the harmonic resonant frequency of a newly-built railway.