The Principle and Method of Improving Short Circuit Ratio of LCC-HVDC by VSC-HVDC

LIANG-HE ZHU, ZHI-CHANG YUAN, CHAO SHENG, PAN-DIAN LUO, FEN-YAN YANG

Abstract


VSC-HVDC has significant impact on LCC-HVDC in hybrid-infeed HVDC system. Based on a hybrid dual-infeed HVDC system, the multi-infeed effective short circuit ratio is deduced which quantitates the improvement effect of VSC-HVDC to LCC-HVDC. Considering both the normal operation target of VSC-HVDC and the transient voltage compensation needed by LCC-HVDC, a control strategy of VSC-HVDC is proposed which can achieve maximum MIESCR.

Keywords


VSC-HVDC, Hybrid-infeed HVDC System, Effective Short Circuit Ratio, Multi-infeed Effective Short Circuit Ratio.


DOI
10.12783/dteees/epee2017/18116

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