VSC-HVDC在电网黑启动时负荷恢复阶段提高系统频率稳定性研究  

VSC-HVDC for enhancing power system frequency stability in the load restoration stage of black start

作　　者：郭丽[1] 赵成勇[1] 李广凯[1] 胡冬良[1] 

机构地区：[1]华北电力大学电力系统保护与动态安全监控教育部重点实验室

出　　处：《华北电力大学学报（自然科学版）》2007年第5期22-26,31,共6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(50577018)

摘　　要：在电网黑启动的负荷恢复阶段,提高系统的频率稳定性对电网的快速恢复具有重要意义。提出基于电压源换流器的高压直流输电系统(VSC-HVDC)作为电网大停电的黑启动电源,建立了交直流混合系统的物理模型,采用VSC-HVDC与发电机调速器协调控制方法,设计了频率作为控制量的有功功率控制器。通过PSCAD/EMTDC环境下仿真,结果表明在电网恢复时采用VSC-HVDC与调速器协调控制可以大幅度恢复负荷,且速度较快,对系统频率具有很好的稳定性。In the load restoration stage of power system black start it is very important to enhance the restoration speed for frequency stability. This paper presents Voltage Source Converter based HVDC （VSC-HVDC） used as black start source. The physical model of AC system and VSC-HVDC is founded and analyzed. Based on the simulation software PSCAD/EMTDC, a coordinated control method of VSC-HVDC and generator is presented to improve stability of AC/ DC hybrid system. Simulation results show that the coordinated control method has excellent dynamic characteristic such as controlling active quickly, and improving the frequency stability of AC system.

关 键 词：VSC-HVDC 黑启动 负荷恢复 调速器 频率稳定性 

分 类 号：TM721.1[电气工程—电力系统及自动化]