CAJ | 학술논문

利用小波变换检测和分析故障行波,准确捕捉故障初始行波和故障点第一个反射波到达保护点的时间。根据电缆的结构特点,利用实时在线测得的故障线路参数,计算出模量行波的传播速度,对故障点进行准确测距定位,得出保护装置选择性动作的原理及判据,实现煤矿电网的故障选线。
이용소파변환검측화분석고장행파,준학포착고장초시행파화고장점제일개반사파도체보호점적시간。근거전람적결구특점,이용실시재선측득적고장선로삼수,계산출모량행파적전파속도,대고장점진행준학측거정위,득출보호장치선택성동작적원리급판거,실현매광전망적고장선선。
The wavelet transform is applied in detection analysis of the fault traveling wave for exactly capturing the duration of the primary fault traveling wave and first reflection wave from the fault point to the protection point.In the light of the structual features of the cable and real time online fault line parameters,the propagating velocity of the modulus wave is calculated,so the fault line in a coal mine grid may be picked out,the fault point may be correctly located and come to the principle and criterion of selective action of the protection device.