Abstract：Firstly, this paper presents the small signal model of VSC-MTDC, including converter, control system(measuring, inner loop/outer loop, PLL), AC system and DC lines. Secondly, the model validation is achieved in time domain by the comparison with an electromagnetic transient state model which is built based on PSCAD/EMTDC. Then, the impact of parameters of PLL, inner loop and outer loop on the stability of VSC-MTDC is quantitatively analyzed based on root locus method, which indicates that PLL has a significant influence on the stability of VSC-MTDC and cannot be ignored. At last, the stability ranges of each parameter are defined.
熊凌飞,韩民晓,姚蜀军. 锁相环对多端柔性直流稳定性作用分析及参数选择研究[J]. 电工技术学报, 2015, 30(16): 203-212.
Xiong Lingfei,Han Minxiao,Yao Shujun. Influence of PLL on the Stability Analysis of VSC-MTDC and Parameter Selection. Transactions of China Electrotechnical Society, 2015, 30(16): 203-212.
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