摘要
分析了架空配电线路产生各种断线故障时,在变电站电源侧和线路负载侧运行工况的变化特点,包括两侧的各相对地电压、中性点位移电压、零序电压以及断线线路的电流和功率等参数。用旋转磁场相互作用的观点论证了断线对电动机负载的影响,指出断线可能产生谐振过电压威胁电气设备的安全。最后阐明了根据各种断线故障的特征判别断线线路的方法。
The author analyzes the changes of operating parameters at substation power source side and line load side when aerial distribution lines see various kinds of line break failures,including the phase voltage to ground,neutral displacement voltage,zero sequence voltage,current and power parameters of break line.The influence of line break on motor load is It demonstrated with rotating magnetic interaction theory.It is pointed out that line break may lead to resonance overvoltage which will endanger electrical equipment safety.The author also introduced the methods of distinguishing break line according to the characteristics of line break failure.
出处
《广西水利水电》
2011年第6期57-60,共4页
Guangxi Water Resources & Hydropower Engineering
关键词
线路断线
对地电压
零序电压
谐振过电压
Line break
voltage to ground
zero sequence voltage
resonance overvoltage
