Impedance modeling and stability analysis of modular multilevel converter considering frequency coupling characteristics

Kai Shi; Peng Lu; Yuxin Sun; Peifeng Xu

Impedance modeling and stability analysis of modular multilevel converter considering frequency coupling characteristics

Vol. 22, No. 8, pp. 1231-1241, Aug. 2022

10.1007/s43236-022-00431-z

Frequency coupling

Generalized Nyquist criterion

Harmonic linearization

Impedance modeling

Modular multilevel converter

Abstract

In recent years, a series of studies concerning the oscillation of interconnected systems has shown that frequency coupling has important effects on the stability of the system. In this paper, a more accurate theoretical model considering the frequency coupling effects is adopted to derive the transmission process in vector control, phase lock loop, and proportional–resonant controller of the harmonic perturbation in the frequency domain. This model is used to further deepen the application of harmonic linearization modeling to impedance modeling. An integrated three-phase modular multilevel converter simulation model based on the PSCAD platform is built to verify the accuracy of the theoretical modeling through the frequency sweep method. The influence of related system parameters on sequence and coupling impedance is analyzed in detail. The generalized Nyquist criterion is used to study the importance of coupling impedance to the stability analysis of the system.

Statistics

Show / Hide Statistics

Cumulative Counts from September 30th, 2019
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.

Cite this article

[IEEE Style]

K. Shi, P. Lu, Y. Sun, P. Xu, "Impedance modeling and stability analysis of modular multilevel converter considering frequency coupling characteristics," Journal of Power Electronics, vol. 22, no. 8, pp. 1231-1241, 2022. DOI: 10.1007/s43236-022-00431-z.

[ACM Style]

Kai Shi, Peng Lu, Yuxin Sun, and Peifeng Xu. 2022. Impedance modeling and stability analysis of modular multilevel converter considering frequency coupling characteristics. Journal of Power Electronics, 22, 8, (2022), 1231-1241. DOI: 10.1007/s43236-022-00431-z.