電氣專業(yè)中英文資料翻譯----110kv供電系統(tǒng)繼電保護(hù)作用淺析-電氣類(文件)
【正文】 lay protection equipment mon belt certain timelag action. The relay protection principle of work mainly has used in the electrical power system the part has when the short circuit or the unusual situation the electrical quantity (electric current, voltage, power, frequency and so on) change as well as in transformer fuel tank when breakdown occurs the massive gas and the oil stream speed increase or the flowing tubing head pressure intensity increase the higher electrical power system request provides the safekeeping of security for it to continue the electricity installment to have following performance: (1) reliability. The reliability is refers to the protection to be supposed to move time the body should act not when the movement should reliable not reliability is to the relay protection installment performance most basic request. (2) selectivity. The selectivity is refers first by the breakdown equipment logical 39。 circuit itself protection or the circuit breaker resist moves, only then allows by the neighboring equipment to protect, the line protection or the circuit breaker malfunction protection excision order to guarantee has in the coordinate request protection and the identical protection has the coordinate request two parts (for example start and trip part or block system and movement part) the selectivity to the neighboring equipment and the line, its sensitivity coefficient and the operating time, should coordinate mutually in the ordinary circumstances. (3) sensitivity. The sensitivity is refers when the equipment logical 39。 一、 11OKV 供電系統(tǒng) 一般來(lái)說(shuō)電力系統(tǒng)包括發(fā)電、變電、輸電、配電和用電等五個(gè)環(huán)節(jié)，五個(gè)環(huán)節(jié)之間相互制約、相互合作共同促成了電力系統(tǒng)的穩(wěn)定。 110Kv供電系統(tǒng)中包含著一次系統(tǒng)和二次系統(tǒng)。 二、 繼電保護(hù)的撅念及相關(guān)原理 電力系統(tǒng)的飛速發(fā)展對(duì)繼電保護(hù)不斷提出新的要求，電子技術(shù)、計(jì)算機(jī)技術(shù)與通信技術(shù)的飛速發(fā)展又為繼電保護(hù)技術(shù)的發(fā)展不斷地注入了新的活力。電力系統(tǒng)要求為其提供安全保護(hù)的繼電裝置具備以下性能 : (1) 可靠性 。 〔 2) 選擇性 。 靈敏性是指在設(shè)備或線路的被保護(hù)范圍內(nèi)發(fā)生金屬性短路時(shí)，保護(hù)裝置應(yīng)具有必要的靈敏系數(shù)，各類保護(hù)的 最小靈敏系數(shù)在規(guī)程中有具體規(guī)定。 三、 繼電保護(hù)在 11OKV供電系統(tǒng)障礙中的作用 1. 保證繼電系統(tǒng)的可靠性是發(fā)揮繼電保護(hù)裝置作用的前提。 繼電保護(hù)在電力系統(tǒng)安全運(yùn)行中的作用主要有以下兩點(diǎn) : (1) 保障電力系統(tǒng)的安全性。反應(yīng)不正常工作情況的繼電保護(hù)裝置允許帶一定的延時(shí)動(dòng)作。 8 。繼電保護(hù)不僅僅是一個(gè)事故處理與反應(yīng)裝置，同時(shí)也是監(jiān)控電力系統(tǒng)正常運(yùn)行的裝置。 (2) 對(duì)電力系統(tǒng)的不正常工作進(jìn)行提示。一般來(lái)說(shuō)繼電保護(hù)的可靠性主要由配置合理、質(zhì)量和技術(shù)性能優(yōu)良的繼電保護(hù)裝置以及正常的運(yùn)行維護(hù)和管 理來(lái)保證。 (4) 速動(dòng)性 。為保證對(duì)相鄰設(shè)備和線路有配合要求的
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