柔性直流输电的小信号稳定性研究及控制系统参数设计  

Research on Small-signal Stability of VSC-HVDC and Control System Parameter Design

作　　者：熊凌飞 韩民晓[1] 万磊[2] 

机构地区：[1]华北电力大学电气与电子工程学院,北京102206 [2]中国电力科学研究院,北京100192

出　　处：《华北电力大学学报（自然科学版）》2015年第3期8-14,共7页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51177044)

摘　　要：针对柔性直流输电(VSC-HVDC)稳定性问题,采用状态空间方程,建立了包含电压源型换流器,交流系统,控制系统(内/外环控制器,锁相环)及直流线路的VSC-HVDC小信号模型,并对各部分的数学模型进行了详细推导。为了验证所建模型的正确性,将其与PSCAD/EMTDC中所建对应的电磁暂态模型进行了详细的时域对照。最后,利用根轨迹的方法对整个交直流系统进行了稳定性研究,详细分析了控制系统中各部分参数对系统稳定性的影响。The small signal model of VSC-HVDC was built based on the state space equations to analyze the stability problem. The model included converter, AC system, control system （inner/outer loop, PLL） and DC transmission line, and the equations of each part were fully deduced. The model built in this paper was verified by comparing with EMTP model in time domain which is built in PSCAD/EMTDC. Finally, the stability of VSC-HVDC was analyzed with root locus, and the effect of parameters of control system to the whole system was investigated in detail.

关 键 词：柔性直流输电 小信号稳定性 控制系统 参数优化 

分 类 号：TM726[电气工程—电力系统及自动化]