CAJ | 학술논문

使用线路两侧的电荷量作为物理量构成差动保护快速动作段,作为现有电流相量差动保护配置方案的补充。提出了电荷变化量差动保护的基本原理、整定原则、实现方式,并研制了试验样机,进行了动模试验验证。研究表明,电荷变化量差动保护区内故障典型动作时间为9~13 ms,最长延时15~16 ms；区外故障时,电流互感器饱和时间不小于5 ms 时,装置可靠不动作,保护原理具有很强的安全性。
사용선로량측적전하량작위물리량구성차동보호쾌속동작단,작위현유전류상량차동보호배치방안적보충。제출료전하변화량차동보호적기본원리、정정원칙、실현방식,병연제료시험양궤,진행료동모시험험증。연구표명,전하변화량차동보호구내고장전형동작시간위9~13 ms,최장연시15~16 ms；구외고장시,전류호감기포화시간불소우5 ms 시,장치가고불동작,보호원리구유흔강적안전성。
The quick action section of differential protection is constructed by the electric charge on both sides of the transmission line as a physical quantity, which is a supplement to the existing configuration scheme of current phasor differential protection.This paper presents the basic principles,setting principle and realization method of change-of-charge differential protection,develops the experimental prototype,and carries out the dynamic simulation experiment for verification. The research has proved that,in the area of change-of-charge differential protection,the typical action time of fault is 9~1 3 ms,and the maximum time delay is 1 5~1 6 ms.In the case of fault outside the protection area,when the time of current transformer saturation is no less than 5 ms,the device is dependable but does not work,the protection principle having high safety performance.