Zhejiang University

Yujing Li

Dong Wang

Ying Huang

Yanxue Yu

Quansen Rong

Pengfei Hu

Daozhuo Jiang

Huanhai Xin

Longyue Wang

Ping Ju

A measurement method for the impedance of the converter at multiple operating points based on the secondary-side disturbance includes the following steps: superimposing the positive sequence current disturbance in the current sampling value; superimposing the positive sequence voltage disturbance in the voltage sampling value; determining whether measurement data of the converter at two or more current operating points are obtained, if so, based on the measurement data of the converter at two current operating points, calculating values of A(s) and B(s); further calculating values of coefficients at each frequency point, and obtaining the impedance value of the converter at multiple current operating points by calculation. The above-mentioned measurement method overcomes the disadvantages of high cost and complicated operation of the impedance measurement method based on the primary-side disturbance, and solves the problem of lacking the pre-judgment function.

Measurement method for impedance of converter at multiple operating points based on secondary-side disturbance

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Hangzhou, China

Yujing Li