电力系统保护与控制Issue(2)：120-125,6.
基于故障分量补偿的VSC_HVDC系统优化控制
VSC_HVDC transmission system optimal control based on fault components compensation
摘要
Abstract
To improve the ability of VSC_HVDC’s passing through faults and supporting AC system voltage quickly when AC fault occurs, this paper firstly analyzes the transient characteristic of VSC_HVDC system during AC grid fault. And then the corresponding optimal control strategies of VSC_HVDC based on fault components are proposed. They are as follows: the double-sequence inner loop current controller, which controls positive and negative sequence components independently, can eliminate power fluctuation caused by AC grid asymmetric faults; the outer loop active power controller based on DC voltage overriding compensation can suppress the great fluctuation of DC voltage; according to the reactive property of fault current during AC grid fault, the outer loop reactive power controller increases reactive current into the AC system to provide quick voltage support. The simulation results from the simulation software PSCAD/EMTDC prove that the proposed controller can validly get rid of the second harmonic of DC system, suppress the swift change of DC voltage, and improve AC voltage stability.关键词
电压源换流器(VSC)/直流输电/故障分析/双序电流控制器/外环功率控制器Key words
voltage source converter(VSC)/HVDC transmission/fault analysis/double sequence inner loop current controller/outer loop power controller分类
信息技术与安全科学引用本文复制引用
温传新,刘洋,武迪,骆健..基于故障分量补偿的VSC_HVDC系统优化控制[J].电力系统保护与控制,2013,(2):120-125,6.基金项目
国家重大科技专项(2011ZX02503-006) （2011ZX02503-006）
