摘要
匝间保护是并联电抗器非常重要的一种主保护,在500 kV超高压电网中应用广泛,主要用来保护电抗匝间短路。介绍了应用于500 kV输电线路的并联高压电抗器SG R751保护装置匝间保护的原理和零序阻抗圆的计算方法;同时介绍了匝间保护的整定计算方法和计算原理;并给出了计算实例,测算出了匝间保护动作电压的特性曲线。该方法同样适用于WDK-600等应用了零序阻抗继电器的高抗保护装置。
Interturn protection is an important main protection of shunt reactors,which is widely used in 500 kV EHV power grid for prevention of interturn short-circuit of reactors.This paper introduces the interturn protection principles of the shunt HV reactor SG R751 and the calculation method of zero sequence impedance circles.The interturn protection setting calculation method and calculation principles are also discussed with a case study and the voltage characteristic curve of the interturn protection action is obtained.This method is also applicable to such high resistance relay protection devices as WDK-600 that adopts the zero-sequence impedance.
出处
《电力建设》
2010年第8期29-31,共3页
Electric Power Construction
关键词
并联电抗器
匝间保护
零序源
阻抗圆
整定计算
动作边界
shunt reactor
interturn protection
zero-sequence source
impedance circle
setting calculation
action border
