云广HVDC孤网运行瞬时频率抑制的附加控制  

Instantaneous Frequency Suppression of Additional Control for HVDC Transmission System from Yunnan to Guangdong Under Islanded Operation

作　　者：李政[1] 李兴源[1] 

机构地区：[1]四川大学电气信息学院,成都610065

出　　处：《电力系统及其自动化学报》2012年第3期5-9,75,共6页Proceedings of the CSU-EPSA

基　　金："十一五"国家科技支撑计划项目(2008BAA13B01);国家自然科学基金资助项目(50877050)

摘　　要：在孤网运行方式下,为抑制交流故障后交流系统的瞬时频率,利用换流器稳态方程导出换流母线电压与直流电流的动态关系,结合故障特点,应用HVDC的快速和高可控特性,设计了一种反映整流站换流母线电压具有惯性环节的高压直流输电(HVDC)瞬时频率附加控制器,实现对整流器给定电流的修正和直流功率调制,提高了故障后送端交流系统瞬时频率稳定性。云广±800kV特高压直流输电系统的电磁仿真结果表明,在送端交流系统故障下,该附加控制器能够有效抑制交流系统的瞬时频率。In the isolated AC system running mode, for suppressing instantaneous frequency when AC system faults, using the steady-state equations of converter, the dynamic relationship between direct current and bus- bar voltage was deduced, with application of the rapid and HVDC high controllable characteristics, a kind of reflection rectifier busbar voltage HVDC instantaneous frequency additional controller with inertial link was de- signed, which gives the current correction of rectifiers, to realize power modulation, and to keep frequency stability of sending end AC system after sending terminal AC system fault. On Yun Guang ±800 kV DC transmission system, electro-magnetic simulation results show that the additional control can suppress the AC system of sending instantaneous frequency with AC system fault occurring in sending end.

关 键 词：孤网 瞬时频率 附加控制 高压直流输电 

分 类 号：TM74[电气工程—电力系统及自动化]