- 繼電保護系統在電力系統中的工作
- 發布人:電大象網 時間:2017-07-27 新聞來源:電虎網 瀏覽量:
繼電保護系統中設備的故障
電力系統中的繼電保護工作是一項細致的工作,其中對于繼電保護裝置設備的要求特別嚴格,而繼電保護裝置中的設備問題往往出現在設備中構件的質量方面,從繼電保護系統的工作原理來說幾乎沒有什么太大的問題,所有的繼電保護系統對于電力系統運行時的故障檢測方法都是一樣的,而不同的電力系統中存在著不同的工作負荷,而繼電保護設備也對電力系統的電流電壓負荷有著不同的要求,所以在繼電保護裝置安裝時要結合電力系統的工作負荷以及工作強度進行考慮,對于電力系統來說要選擇合適的繼電保護設施,爭取繼電裝置中的每一個系統都要符合電力系統的實際標準,如果某一個部位的構件出現了問題將會影響整個繼電保護裝置的檢測中的數據準確率甚至影響其運行,當繼電保護系統出現設備問題時則會使其繼電保護動作失控,甚至出現拒動或者誤動的問題,影響電力系統的運行功能和電力系統整體的穩定。
繼電保護系統的開關設備故障
繼(ji)電(dian)(dian)(dian)保護(hu)(hu)系統中出現(xian)的(de)(de)開關(guan)設(she)備(bei)(bei)的(de)(de)故(gu)(gu)障(zhang)主要是(shi)由于(yu)繼(ji)電(dian)(dian)(dian)保護(hu)(hu)系統與(yu)(yu)電(dian)(dian)(dian)力(li)(li)系統不(bu)匹(pi)(pi)配的(de)(de)原因造成的(de)(de),首先在進行(xing)機電(dian)(dian)(dian)保護(hu)(hu)裝(zhuang)置的(de)(de)選擇是(shi)對于(yu)電(dian)(dian)(dian)力(li)(li)系統的(de)(de)工(gong)作(zuo)(zuo)強度是(shi)有科學的(de)(de)規定(ding)的(de)(de),而電(dian)(dian)(dian)力(li)(li)系統中初始(shi)的(de)(de)繼(ji)電(dian)(dian)(dian)保護(hu)(hu)設(she)備(bei)(bei)往(wang)往(wang)是(shi)與(yu)(yu)之工(gong)作(zuo)(zuo)負(fu)荷(he)較為匹(pi)(pi)配的(de)(de),但是(shi)隨(sui)(sui)著工(gong)作(zuo)(zuo)強度的(de)(de)加大或者繼(ji)電(dian)(dian)(dian)保護(hu)(hu)系統使(shi)用時間的(de)(de)增多,繼(ji)電(dian)(dian)(dian)保護(hu)(hu)裝(zhuang)置也(ye)應該隨(sui)(sui)之更新,否則(ze)如果發生(sheng)繼(ji)電(dian)(dian)(dian)保護(hu)(hu)裝(zhuang)置老(lao)化或者超負(fu)荷(he)的(de)(de)情(qing)況,會(hui)導致繼(ji)電(dian)(dian)(dian)保護(hu)(hu)系統開關(guan)設(she)備(bei)(bei)出現(xian)負(fu)荷(he)密集(ji),由于(yu)開關(guan)設(she)備(bei)(bei)不(bu)能適應符合實際而出現(xian)繼(ji)電(dian)(dian)(dian)保護(hu)(hu)開關(guan)設(she)備(bei)(bei)的(de)(de)穩定(ding)性與(yu)(yu)準確性的(de)(de)問題,畢(bi)竟繼(ji)電(dian)(dian)(dian)保護(hu)(hu)系統不(bu)能勝任(ren)電(dian)(dian)(dian)力(li)(li)系統的(de)(de)檢測工(gong)作(zuo)(zuo),電(dian)(dian)(dian)力(li)(li)系統的(de)(de)正常運行(xing)也(ye)會(hui)因此而受(shou)到影(ying)響,對于(yu)故(gu)(gu)障(zhang)不(bu)能及時的(de)(de)排除,甚至發生(sheng)電(dian)(dian)(dian)力(li)(li)事故(gu)(gu)。
電流互感飽和故障
由于(yu)繼電(dian)(dian)(dian)(dian)(dian)(dian)保護(hu)(hu)設備終(zhong)端的(de)(de)(de)(de)負荷不斷(duan)(duan)增(zeng)大(da),電(dian)(dian)(dian)(dian)(dian)(dian)力(li)(li)系(xi)(xi)統(tong)的(de)(de)(de)(de)運行過程(cheng)中(zhong)可(ke)(ke)能產生(sheng)的(de)(de)(de)(de)短(duan)路現(xian)象中(zhong)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)也會(hui)不斷(duan)(duan)的(de)(de)(de)(de)增(zeng)強(qiang),而繼電(dian)(dian)(dian)(dian)(dian)(dian)保護(hu)(hu)裝(zhuang)(zhuang)置(zhi)受(shou)到(dao)來自電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)互感器飽(bao)和的(de)(de)(de)(de)影(ying)響(xiang)也會(hui)慢(man)慢(man)增(zeng)強(qiang),當短(duan)路的(de)(de)(de)(de)現(xian)象發(fa)(fa)生(sheng)在(zai)靠(kao)近電(dian)(dian)(dian)(dian)(dian)(dian)力(li)(li)系(xi)(xi)統(tong)終(zhong)端設備的(de)(de)(de)(de)位置(zhi)上時(shi),因為短(duan)路所(suo)產生(sheng)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)就會(hui)超過電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)互感器單次(ci)規定電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)的(de)(de)(de)(de)一百(bai)倍之(zhi)多(duo),而電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)互感器的(de)(de)(de)(de)誤差則是與短(duan)路電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)倍數成正比例(li)關系(xi)(xi)的(de)(de)(de)(de),則繼電(dian)(dian)(dian)(dian)(dian)(dian)保護(hu)(hu)系(xi)(xi)統(tong)檢測(ce)到(dao)電(dian)(dian)(dian)(dian)(dian)(dian)力(li)(li)系(xi)(xi)統(tong)故(gu)(gu)障時(shi)所(suo)發(fa)(fa)出的(de)(de)(de)(de)阻(zu)止命令也會(hui)隨著(zhu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)的(de)(de)(de)(de)過大(da)而發(fa)(fa)生(sheng)靈敏(min)度降低的(de)(de)(de)(de)情況,這(zhe)就意(yi)味著(zhu)在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)力(li)(li)系(xi)(xi)統(tong)運行中(zhong)即使(shi)發(fa)(fa)生(sheng)了(le)故(gu)(gu)障,繼電(dian)(dian)(dian)(dian)(dian)(dian)保護(hu)(hu)系(xi)(xi)統(tong)也不能及(ji)時(shi)的(de)(de)(de)(de)發(fa)(fa)現(xian)并且做阻(zu)斷(duan)(duan)工作,著(zhu)無疑增(zeng)加了(le)電(dian)(dian)(dian)(dian)(dian)(dian)力(li)(li)系(xi)(xi)統(tong)運行中(zhong)的(de)(de)(de)(de)危(wei)險性(xing),而這(zhe)時(shi)繼電(dian)(dian)(dian)(dian)(dian)(dian)保護(hu)(hu)系(xi)(xi)統(tong)中(zhong)的(de)(de)(de)(de)定時(shi)限制通過電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)裝(zhuang)(zhuang)置(zhi)也會(hui)由于(yu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)的(de)(de)(de)(de)短(duan)路而發(fa)(fa)生(sheng)故(gu)(gu)障,過流(liu)保護(hu)(hu)裝(zhuang)(zhuang)置(zhi)拒絕(jue)工作時(shi)其限制電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)的(de)(de)(de)(de)程(cheng)度幾(ji)乎為零,電(dian)(dian)(dian)(dian)(dian)(dian)力(li)(li)系(xi)(xi)統(tong)依舊(jiu)可(ke)(ke)以(yi)運行,但(dan)是卻少了(le)繼電(dian)(dian)(dian)(dian)(dian)(dian)保護(hu)(hu)系(xi)(xi)統(tong)中(zhong)的(de)(de)(de)(de)故(gu)(gu)障檢測(ce)的(de)(de)(de)(de)安全(quan)保障。
繼電器觸點故障
繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)保(bao)(bao)護系(xi)(xi)(xi)(xi)統(tong)裝置中核心裝置就(jiu)是繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi),其(qi)(qi)對(dui)于(yu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)力系(xi)(xi)(xi)(xi)統(tong)的(de)(de)(de)(de)(de)(de)(de)故(gu)(gu)障檢測與(yu)排除(chu)都是通過繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)實(shi)現的(de)(de)(de)(de)(de)(de)(de),也(ye)就(jiu)是說如果繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)發(fa)生了故(gu)(gu)障,繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)保(bao)(bao)護系(xi)(xi)(xi)(xi)統(tong)則停止工作(zuo),而(er)繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)裝置中最薄弱的(de)(de)(de)(de)(de)(de)(de)部(bu)位則是繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)觸(chu)點(dian)(dian),繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)觸(chu)點(dian)(dian)的(de)(de)(de)(de)(de)(de)(de)安全性受很多(duo)方(fang)(fang)面的(de)(de)(de)(de)(de)(de)(de)影響,如觸(chu)點(dian)(dian)裝置的(de)(de)(de)(de)(de)(de)(de)材料(liao)、所承受的(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流與(yu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)值(zhi)以及所符(fu)(fu)合的(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)力系(xi)(xi)(xi)(xi)統(tong)的(de)(de)(de)(de)(de)(de)(de)類型等,其(qi)(qi)中繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)系(xi)(xi)(xi)(xi)統(tong)工作(zuo)的(de)(de)(de)(de)(de)(de)(de)頻率(lv)、大(da)氣的(de)(de)(de)(de)(de)(de)(de)環(huan)境、繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)觸(chu)點(dian)(dian)的(de)(de)(de)(de)(de)(de)(de)配置都屬(shu)(shu)于(yu)繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)觸(chu)點(dian)(dian)的(de)(de)(de)(de)(de)(de)(de)故(gu)(gu)障發(fa)生導體之一(yi),其(qi)(qi)中任何因素不(bu)能(neng)與(yu)設定(ding)(ding)的(de)(de)(de)(de)(de)(de)(de)預(yu)定(ding)(ding)值(zhi)相符(fu)(fu)合都有(you)可(ke)能(neng)造成(cheng)繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)觸(chu)點(dian)(dian)的(de)(de)(de)(de)(de)(de)(de)故(gu)(gu)障發(fa)生,其(qi)(qi)故(gu)(gu)障的(de)(de)(de)(de)(de)(de)(de)主要表現為(wei)金屬(shu)(shu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)積、觸(chu)點(dian)(dian)焊接(jie)(jie)、觸(chu)點(dian)(dian)磨損(sun)、觸(chu)點(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻快速增加等,這些故(gu)(gu)障的(de)(de)(de)(de)(de)(de)(de)發(fa)生在(zai)很大(da)程度上會影響繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)接(jie)(jie)觸(chu)的(de)(de)(de)(de)(de)(de)(de)可(ke)靠(kao)性,繼(ji)而(er)會影響整個(ge)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)力系(xi)(xi)(xi)(xi)統(tong)的(de)(de)(de)(de)(de)(de)(de)安全運行(xing),而(er)針對(dui)繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)觸(chu)點(dian)(dian)的(de)(de)(de)(de)(de)(de)(de)故(gu)(gu)障排除(chu)而(er)言,隨著不(bu)斷(duan)的(de)(de)(de)(de)(de)(de)(de)實(shi)踐摸索,也(ye)存在(zai)著很多(duo)辦(ban)法(fa),如對(dui)其(qi)(qi)觸(chu)點(dian)(dian)材料(liao)進行(xing)定(ding)(ding)時的(de)(de)(de)(de)(de)(de)(de)檢查(cha)與(yu)更新,對(dui)期(qi)經(jing)過的(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流嚴格按(an)照負荷(he)值(zhi)進行(xing)控制、對(dui)其(qi)(qi)磨損(sun)的(de)(de)(de)(de)(de)(de)(de)程度進行(xing)定(ding)(ding)級的(de)(de)(de)(de)(de)(de)(de)方(fang)(fang)式檢測等,保(bao)(bao)證(zheng)繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)觸(chu)點(dian)(dian)的(de)(de)(de)(de)(de)(de)(de)正(zheng)常使(shi)用就(jiu)是保(bao)(bao)證(zheng)繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)系(xi)(xi)(xi)(xi)統(tong)的(de)(de)(de)(de)(de)(de)(de)正(zheng)常運行(xing),也(ye)就(jiu)是保(bao)(bao)障電(dian)(dian)(dian)(dian)(dian)(dian)(dian)力系(xi)(xi)(xi)(xi)統(tong)的(de)(de)(de)(de)(de)(de)(de)安全運行(xing)。
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重要詞:電力,電氣
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