CAJ | 학술논문

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。
전력계통단로고장시형성적호도전조일반대전망빈솔은정성영향불대，재방진계산중통상여이홀략，단당보호거동고장지속시간원대우통상단로고장시，호도전조효응대전망빈솔은정성적영향장변득불용홀시。연구료호도전조효응대전망빈솔은정성적영향，이2005년해남전망사고록파위의거，분석료조속계통조차계수、사구화조속기정운대전망빈솔은정성적영향，재계급호도전조효응후교호지의합료사고과정。방진표명당고장지속시간교장시전망빈솔은정성분석응계급호도전조효응。
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.