【正文】
asuring 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。如果經(jīng)一整定時(shí)間后斷路器仍流過(guò)故障電流,則向相鄰的斷路器發(fā)一個(gè)后備跳閘信號(hào),這樣即使斷路器故障時(shí)也能保證清除故障。 ?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(chēng)負(fù)荷時(shí)造成非預(yù)期的操作。專(zhuān)業(yè)外語(yǔ) 南京工程學(xué)院電力系 蔣志平 2022年 2月 英譯中 中譯英 詞匯 Application Breaker pole position discordance can occur on the operation of a breaker with independent operating gears for the three poles. The reason may be an interruption in the closing or trip coil circuit, or a mechanical failure resulting in a stuck (卡住的,不能動(dòng)的 ) breaker pole. A pole discordance can be tolerated for a limited time, for instance during a singlephase tripreclose cycle. The pole discordance function detects a breaker pole discordancy not generated by autoreclose cycle and issues a trip signal for the circuit breaker. 1. Pole discordance protection (PD) 三相不一致保護(hù)( PD) ?應(yīng)用 ?在操作有三相獨(dú)立操作機(jī)構(gòu)的斷路器時(shí),可能會(huì)發(fā)生斷路器位置不一致的情況,可能是由于跳閘線(xiàn)圈回路斷線(xiàn),或是由于機(jī)械原因使斷路器某一極被卡住。 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(zhuān)用的開(kāi)關(guān)量輸入回路相連。當(dāng)跳閘信號(hào)送到斷路器失靈保護(hù)時(shí),先不經(jīng)延時(shí)或經(jīng)很短的延時(shí)向保護(hù)斷路器發(fā)重跳信號(hào)。 ?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。 ? 特殊的自適應(yīng)算法( ASD)同 RMS有效值測(cè)量一道使用,可快速?gòu)?fù)歸電流測(cè)量元件的時(shí)間,電流測(cè)量元件可對(duì)由于電流互感器飽和可能會(huì)引起誤動(dòng)作的暫態(tài)過(guò)程進(jìn)行制動(dòng)。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)。 1段、 2段、 3段可以發(fā)選相信號(hào),如起動(dòng)、跳閘信號(hào)。主要用于加強(qiáng)長(zhǎng)線(xiàn)路重負(fù)荷線(xiàn)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。對(duì)相相、相地測(cè)量,獨(dú)立的電抗范圍整定也保證用作網(wǎng)絡(luò)中短路故障、接地故障的不同保護(hù)繼電器有高度的選相特性。 ? 為滿(mǎn)足單母線(xiàn)、雙母線(xiàn), 3/2斷路器接線(xiàn)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。單相、兩相自動(dòng)重合閘功能與單相、兩相跳閘相配合,主要作用是降低非三相的故障對(duì)系統(tǒng)影響。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(zhuān)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(zhuān)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(zhuān)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(chēng)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