摘要
针对特大型交流同步电网建设快速推进带来的系统低频振荡频率和阻尼比降低的问题,在分析常用PSS2B型电力系统稳定器的设计理念和工作原理的基础上,指出其低频段阻尼不足的原理性缺陷,进而提出一种通过扭转前置相位关系来避免使用大角度超前补偿的新型电力系统稳定器PSS-NEW-B的设计思路。新型PSS保留了原PSS2B高频段抑制能力强和反调抑制的功能优点,同时明显提升了低频段抑制能力。通过仿真计算验证了PSS-NEW-B提升电网中、低振荡频段小干扰稳定水平及电网故障后恢复能力的效果,可为下一阶段新型PSS-NEW-B数模仿真、动模试验和工程化应用研究提供指导。
Construction of large-scale synchronous AC power grid leads to lower oscillation frequency and poorer damping.PSS2B power system stabilizer＇s design conception is analyzed.Its low frequency band oscillation suppression ability is limited by its original defects.Thus,a PSS-NEW-B stabilizer design idea is proposed.Phase relationship of electromagnetic power input is adjusted to limit leading compensation and retain inverse regulating suppression function.Simulation result based on MATLAB and PSASP shows that PSS-NEW-B can increase overall gain of PSS to get more damping in entire frequency band relative to PSS2B,thereby promote dynamic stability of large AC synchronous power system,particularly in low frequency band.
出处
《电网技术》
EI
CSCD
北大核心
2016年第5期1462-1468,共7页
Power System Technology
基金
浙江省电力公司科技项目(5211DS150025)
