计及弧道电阻效应的电网频率稳定性分析  

Power Grid Frequency Stability Analysis Considering Effects of Arc Resistance

作　　者：赵强 徐征雄[1] 赵晔[2] 张丽[3] 王琦[1] 

机构地区：[1]中国电力科学研究院,北京市海淀区100192 [2]国家电网公司,北京市西城区100031 [3]北京国电华北电力工程有限公司,北京市西城区100120

出　　处：《电网技术》2011年第10期36-40,共5页Power System Technology

摘　　要：电力系统短路故障时形成的弧道电阻一般对电网频率稳定性影响不大,在仿真计算中通常予以忽略,但当保护拒动故障持续时间远大于通常短路故障时,弧道电阻效应对电网频率稳定性的影响将变得不容忽视。研究了弧道电阻效应对电网频率稳定性的影响,以2005年海南电网事故录波为依据,分析了调速系统调差系数、死区和调速器停运对电网频率稳定性的影响,在计及弧道电阻效应后较好地拟合了事故过程。仿真表明当故障持续时间较长时电网频率稳定性分析应计及弧道电阻效应。In general, the influence of arc resistance caused by short-circuit fault on power system frequency stability is slight, so arc resistance effect is usually neglected in simulation. However, when the duration of protection failure far exceeds the duration of usual short-circuit fault, the affect of arc resistance effect on power system frequency stability cannot be ignored. The influence of arc resistance effect on power system frequency stability is researched, and based on the recorded data of the fault occurred in Hainan power grid in 2005, the influences of frequency bias coefficient, died-zone and outage of governing system on power system frequency stability are analyzed, and taking arc resistance effect taken into account the fault process is well fitted. Simulation results show that in the analysis on power system frequency stability the arc resistance effect should be taken into account while the duration of fault is long.

关 键 词：频率稳定 弧道电阻 调差系数 调速器死区 电力系统仿真 

分 类 号：TM76[电气工程—电力系统及自动化]