基于高參數(shù)晶閘管實現(xiàn)50 kA直流斷路器的可靠開斷
樓曉峰，胡醇，董濤，楊孝志，陳超
(1 西安電力電子技術(shù)研究所，陜西 西安 710061；
2 蘇州電器科學(xué)研究院股份有限公司，江蘇 蘇州 215104；
3 國網(wǎng)安徽省電力公司電力科學(xué)研究院，安徽 合肥 230601)
摘 要： 介紹了電流對沖法在直流斷路器可靠開斷方面的應(yīng)用，分析了電流對沖法的工作原理和試驗過程中遇到的技術(shù)問題，通過高參數(shù)晶閘管器件、飽和電抗器和同步操作機(jī)構(gòu)的配合使用，實現(xiàn)了直流斷路器精確、可靠的開斷，結(jié)果表明：通過控制同步操作機(jī)構(gòu)和觸發(fā)晶閘管器件來精確把握開斷過程中兩個回路的對沖點是關(guān)鍵，電流對沖法充分利用了晶閘管器件的優(yōu)點，保證了整個開斷過程的精確性；飽和電抗器有效抑制了對沖電流過零時的di /dt 和反峰電壓的增長，保護(hù)了晶閘管器件；整個回路造價經(jīng)濟(jì)，很大程度上彌補(bǔ)了傳統(tǒng)試驗方法中的不足。
關(guān)鍵詞： 晶閘管；單次浪涌電流能力；直流斷路器開斷；飽和電抗器；過零時的di /dt；電流對沖法
中圖分類號：TM461.4，TM561 文獻(xiàn)標(biāo)識碼：B 文章編號：1007-3175(2015)11-0027-04
Implementation of Reliable Interruption of 50 kA Direct Current Circuit Breakers Based on High Parameters Thyristors
LOU Xiao-feng, HU
Chun, DONG Tao, YANG Xiao-zhi,CHEN Chao
（1 Xi’an Power Electronics Research Institute, Xi’an 710061, China;
2 Suzhou Electrical Apparatus Science Academy, Suzhou 215104, China;
3 State Grid Anhui Electric Power Research Institute, Hefei 230601, China）
Abstract: Introduction was made to the application of the current hedge method in the reliable interruption of direct current (DC)circuit breakers, and analysis was made to the operating principle of the current hedge method and the technical problems in the test process. Through the co-use of the thyristor devices with high parameters, saturated reactors and synchronous operating mechanism,the reliable and accurate interruption of DC circuit breakers were achieved. The result shows that the key point is how to accurately seize the hedge point of two circuits in the interruption process by controlling the synchronous operating mechanism and trigger thyristor devices. The current hedge method takes full advantage of the thyristor devices, ensuring the accuracy of the whole interruption process. The di/dt of hedge current at current zero and the rising amplitude of peak reverse voltage have been suppressed effectively by saturated reactors, and the thyristor devices have also been protected. The whole circuit costs economically and largely make up for the shortcomings of the traditional methods.
Key words: thyristor; single surge current capability; interruption of direct current circuit breakers; saturated reactor; di/dt at current
zero; current hedge method
參考文獻(xiàn)
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