小电流接地选线
小电(dian)流接(jie)地系(xi)统单(dan)相(xiang)接(jie)地故障选线装置(zhi)是在小电(dian)流接(jie)地系(xi)统中,用于(yu)检测发生单(dan)相(xiang)接(jie)地故障支路的装置(zhi)。80年代后期,华北电(dian)力(li)大(da)学杨以(yi)涵教(jiao)授研制出(chu)了国内第一台选线装置(zhi)。
KA2003-DH系列“小电(dian)(dian)流接地电(dian)(dian)网单相接地故障选(xuan)(xuan)线(xian)(xian)装(zhuang)置”,是杨教授“小电(dian)(dian)流接地选(xuan)(xuan)线(xian)(xian)课题(ti)组”近三十多年(nian)来的(de)技术积淀与结晶,克服了第一代小电(dian)(dian)流选(xuan)(xuan)线(xian)(xian)产(chan)品(pin)存在的(de)选(xuan)(xuan)线(xian)(xian)判(pan)据(ju)(ju)(ju)不(bu)充分,选(xuan)(xuan)线(xian)(xian)手段单一,不(bu)能(neng)(neng)适应各(ge)种复杂的(de)接地故障类(lei)型和测量信(xin)号数据(ju)(ju)(ju)处理手段简单,不(bu)能(neng)(neng)从微弱(ruo)的(de)信(xin)号中准(zhun)(zhun)确提取出有(you)用信(xin)息等诸多影(ying)响选(xuan)(xuan)线(xian)(xian)准(zhun)(zhun)确率的(de)问题(ti),将各(ge)种选(xuan)(xuan)线(xian)(xian)判(pan)据(ju)(ju)(ju)有(you)机地集成(cheng)为充分判(pan)据(ju)(ju)(ju),并与多种数据(ju)(ju)(ju)处理算法和各(ge)种选(xuan)(xuan)线(xian)(xian)方法融为一体。构成(cheng)了各(ge)种判(pan)据(ju)(ju)(ju)有(you)效域优势互补,能(neng)(neng)适应变(bian)化多端(duan)的(de)单相接地故障形态的(de)多层次全方位的(de)智能(neng)(neng)化选(xuan)(xuan)线(xian)(xian)系统。
KA2003-DH系(xi)列选(xuan)(xuan)(xuan)(xuan)线(xian)(xian)(xian)装(zhuang)置实(shi)时采集(ji)系(xi)统故障信号(hao),应用多种选(xuan)(xuan)(xuan)(xuan)线(xian)(xian)(xian)方(fang)法(fa)(fa)进行综(zong)合选(xuan)(xuan)(xuan)(xuan)线(xian)(xian)(xian),通(tong)过粗糙集(ji)理(li)论对每一种选(xuan)(xuan)(xuan)(xuan)线(xian)(xian)(xian)方(fang)法(fa)(fa)都界(jie)定(ding)了有效域,应用证(zheng)据理(li)论将多种选(xuan)(xuan)(xuan)(xuan)线(xian)(xian)(xian)方(fang)法(fa)(fa)融合到一起(qi),最大(da)限(xian)度地保证(zheng)各种选(xuan)(xuan)(xuan)(xuan)线(xian)(xian)(xian)方(fang)法(fa)(fa)之间实(shi)现(xian)优势互补。为了避免故障信号(hao)受(shou)到干扰而(er)导(dao)致误选(xuan)(xuan)(xuan)(xuan),装(zhuang)置采用了连(lian)续选(xuan)(xuan)(xuan)(xuan)线(xian)(xian)(xian)方(fang)法(fa)(fa),每隔一定(ding)时间(1秒)重新采集(ji)数据进行分析,只(zhi)要故障没有消失,装(zhuang)置的选(xuan)(xuan)(xuan)(xuan)线(xian)(xian)(xian)计算就不停止。