【正文】 障的正確可靠選相，與單相跳閘、自動重合閘組合在一起保證整個系統(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（ ZM） ?相 — 地距離保護在直接接地或低阻抗接地網(wǎng)絡中可作為基本的接地保護功能，加上一個獨立的選相邏輯，也可作為隔離接地或諧振接地網(wǎng)絡中跨區(qū)域故障的選擇性保護功能。 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（ BFP） ? 重跳命令需要帶一個附加的延時 t1。 ?另外，有一個自動檢測斷路器電流的電路，該功能在合閘或跳閘幾秒鐘后投入，以避免不對稱負荷時造成非預期的操作。 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（ PD） ?功能特性 ?三相不一致邏輯 PD動作基于檢查斷路器的輔接點位置，由斷路器每相的三個常開并輔接點與三個常閉并輔接點串聯(lián)構(gòu)成三相不一致檢查條件，然后與專用的開關(guān)量輸入回路相連。 ?分相電流測量元件的動作值可以在很寬的范圍內(nèi)設(shè)定，對分相斷路器失靈檢測，可以有三個獨立的定時器 t2。對每一段分別在電抗、電阻方向上的獨立整定使其作為電力系統(tǒng)中快速、有選擇性的短路保護。主要用于加強長線路重負荷線路網(wǎng)絡中整個距離保護的選相性能，常用于直接接地的網(wǎng)絡中。 ? 為滿足單母線、雙母線， 3/2斷路器接線方式，在一個保護終端內(nèi)可以有一個、兩個、三個或六個相同的 AR功能塊。s Element ? 電力系統(tǒng)內(nèi)部過電壓 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)英語詞匯 10 ? 電路原理實驗 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 ? 電子專題實踐 Topics on experimental project of electronics ? 電氣工程概論 Introduction to electrical engineering ? 電子電機集成系統(tǒng) electronic machine system ? 電力傳動與控制 Electrical Drive and Control ? 電力系統(tǒng)繼電保護 Power System Relaying Protection 電力系統(tǒng)專業(yè)英語詞匯 11 ? Electric power system(電力系統(tǒng) ) ? generator(發(fā)電機 ), generation(發(fā)電 ), generating unit(發(fā)電機組 ) ? 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