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.
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
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)
