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电网技术  2011 

计及弧道电阻效应的电网频率稳定性分析

, PP. 36-40

Keywords: 频率稳定,弧道电阻,调差系数,调速器死区,电力系统仿真

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Abstract:

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。

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