Analysis of high-frequency interference characteristics of UHVDC converters

The Journal of Engineering

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[1] Department of Electrical Engineering, Zhejiang University, Hangzhou, People's Republic of China;

关键词: HVDC power convertors;    valves;    HVDC power transmission;    substations;    reactors (electric);    Fourier transforms;    UHVDC converters;    converter station;    converter valve;    high-frequency noise level;    high-frequency interference characteristics;    UHVDC PLC filter;    PSCAD simulation platform;    Zhundong–Wannan UHVDC transmission project;    smoothing reactor;    Fourier transform;    voltage 1100.0 kV;   

DOI  :  10.1049/joe.2018.8830

来源: publisher

【 摘 要 】

The converter is the main component of the converter station and the main noise source of the PLC interference. The accurate modelling of the high-frequency characteristics of the converter is the foundation for the design of the ± 1100 kV UHVDC PLC filter. Based on deep analysis of the high-frequency characteristics of the converter valve, this paper first proposes three high-frequency models of the converter valve. Compared with a real converter valve used in similar HVDC project, model two is chosen to analyse the high-frequency characteristics. Second, the model of Zhundong–Wannan UHVDC transmission project is established in the PSCAD simulation platform to determine the actual high-frequency characteristics of the converter valve. The voltage before the smoothing reactor is calculated, and the high-frequency noise level is obtained by Fourier transform. Considering the practical application of the high-frequency model of the converter valve, this paper finally proposes a formula to express the measured noise level. The noise source expressed by the formula is more practical for research on high-frequency characteristics of the converter station.

【 授权许可】

CC BY