【正文】 障的正確可靠選相，與單相跳閘、自動(dòng)重合閘組合在一起保證整個(gè)系統(tǒng)的穩(wěn)定。 3. Distance protection (ZM) ? Phasetoearth distance protection serves as basic earth fault protection in works with directly or low impedance earthed works. Together with an independent phase preference logic, it also serves as selective protection function at crosscountry faults in isolated or resonantly earthed works. ? Independent reactive reach setting for phasetophase and for phasetoearth measurement secures high selectivity in works with different protective relays used for short circuit and earthfault protection. 距離保護(hù)（ ZM） ?相 — 地距離保護(hù)在直接接地或低阻抗接地網(wǎng)絡(luò)中可作為基本的接地保護(hù)功能，加上一個(gè)獨(dú)立的選相邏輯，也可作為隔離接地或諧振接地網(wǎng)絡(luò)中跨區(qū)域故障的選擇性保護(hù)功能。 2. Breaker failure protection ? An additional timer t1 for retrip mand is available. Dedicated setting allows to enable or disable the retrip or to perform it by current check or not. Retrip to the faulty circuit breaker can be issued single phase or three phases. ? Special adaptive algorithm (ASD), together with RMS measurement, allow a fast resetting time of the current measuring elements. The current measurement is stabilized against transients which can cause unwanted operation with saturated current transformers. 斷路器失靈保護(hù)（ BFP） ? 重跳命令需要帶一個(gè)附加的延時(shí) t1。 ?另外，有一個(gè)自動(dòng)檢測(cè)斷路器電流的電路，該功能在合閘或跳閘幾秒鐘后投入，以避免不對(duì)稱負(fù)荷時(shí)造成非預(yù)期的操作。 Functionality The operation of the pole discordance logic, PD, it based on checking the position of the breaker auxiliary contacts. Three parallel normally open contacts in series with three normally closed contacts in parallel of the respective breaker poles form a condition of pole discordance, connected to a binary dedicated for the purpose. In addition, there is an automatic detection criterion based on parison of currents in the breaker poles. This function is enabled for just a few seconds after close or trip mands to the breaker in order to avoid unwanted operation in unsymmetrical load conditions. 1. Pole discordance protection (PD) 三相不一致保護(hù)（ PD） ?功能特性 ?三相不一致邏輯 PD動(dòng)作基于檢查斷路器的輔接點(diǎn)位置，由斷路器每相的三個(gè)常開(kāi)并輔接點(diǎn)與三個(gè)常閉并輔接點(diǎn)串聯(lián)構(gòu)成三相不一致檢查條件，然后與專用的開(kāi)關(guān)量輸入回路相連。 ?分相電流測(cè)量元件的動(dòng)作值可以在很寬的范圍內(nèi)設(shè)定，對(duì)分相斷路器失靈檢測(cè)，可以有三個(gè)獨(dú)立的定時(shí)器 t2。對(duì)每一段分別在電抗、電阻方向上的獨(dú)立整定使其作為電力系統(tǒng)中快速、有選擇性的短路保護(hù)。主要用于加強(qiáng)長(zhǎng)線路重負(fù)荷線路網(wǎng)絡(luò)中整個(gè)距離保護(hù)的選相性能，常用于直接接地的網(wǎng)絡(luò)中。 ? 為滿足單母線、雙母線， 3/2斷路器接線方式，在一個(gè)保護(hù)終端內(nèi)可以有一個(gè)、兩個(gè)、三個(gè)或六個(gè)相同的 AR功能塊。s Element ? 電力系統(tǒng)內(nèi)部過(guò)電壓 Past Voltage within Power system ? 模擬電子技術(shù)基礎(chǔ) Basis of Analogue Electronic Technique ? 數(shù)字電子技術(shù) Digital Electronic Technique 電力系統(tǒng)專業(yè)英語(yǔ)詞匯 10 ? 電路原理實(shí)驗(yàn) Lab. of principle of circuits ? 電氣工程講座 Lectures on electrical power production ? 電力電子基礎(chǔ) Basic fundamentals of power electronics ? 高電壓工程 High voltage engineering ? 電子專題實(shí)踐 Topics on experimental project of electronics ? 電氣工程概論 Introduction to electrical engineering ? 電子電機(jī)集成系統(tǒng) electronic machine system ? 電力傳動(dòng)與控制 Electrical Drive and Control ? 電力系統(tǒng)繼電保護(hù) Power System Relaying Protection 電力系統(tǒng)專業(yè)英語(yǔ)詞匯 11 ? Electric power system(電力系統(tǒng) ) ? generator(發(fā)電機(jī) ), generation(發(fā)電 ), generating unit(發(fā)電機(jī)組 ) ? thermal units, hydro units, boiler, turbine, turbinegenerator ? generating reserve capacity(發(fā)電備用容量 ), ? transformer(變壓器 ), tapchanging ~, phaseshifting ~ ? startandstandby auxiliary transformer(起 /備變 ) ? transducer(變送器 ), CT(~ transformer), PT(potential transformer) ? DC(direct current), AC(alternating current) ? threephase ac system(三相交流系統(tǒng) ), ? voltage, current, frequency, phase angle, power (功率 ) ? nominal value(標(biāo)稱值 ) , rating(額定值 ), per unit value ? HV(high voltage), EHV(extrahigh voltage) ? transmission system(輸電系統(tǒng) ), distribution system(配 電系統(tǒng) ) ? asynchronous motor(),synchronous motor/m