Suzhou Electric Appliance Research Institute
期刊號： CN32-1800/TM| ISSN1007-3175

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基于全并聯(lián)AT供電方式的T-F短路故障測距及仿真研究

來源：電工電氣發(fā)布時間：2023-02-07 09:07 瀏覽次數(shù)：405

基于全并聯(lián)AT供電方式的T-F短路故障測距及仿真研究

柳敬
(中交機(jī)電工程局有限公司，湖北 武漢 430061)
 
    摘 要：全并聯(lián)電壓互感器 (AT) 牽引供電普遍應(yīng)用于我國的高速鐵路牽引網(wǎng)中，當(dāng)供電系統(tǒng)發(fā)生各種短路故障時，不迅速切除故障和盡快繼續(xù)穩(wěn)定供電，可能會影響鐵路系統(tǒng)的正常運(yùn)行甚至發(fā)生很嚴(yán)重的安全事故。介紹了高速鐵路最常用的牽引供電方式——全并聯(lián) AT 供電，在此基礎(chǔ)上對牽引網(wǎng)發(fā)生 T-F 短路故障進(jìn)行了電氣計(jì)算和理論分析，并提出了精確度高、不受外部因素影響的“橫聯(lián)線電流比”故障測距原理；根據(jù)實(shí)際運(yùn)行線路，設(shè)置 AT 供電牽引網(wǎng)的參數(shù)，并在 MATLAB 軟件中建立仿真模型，對提出的短路故障測距原理進(jìn)行仿真驗(yàn)證分析，得出故障測距仿真的正確結(jié)果，證明了理論分析的正確性。
    關(guān)鍵詞： AT 牽引供電；T-F 短路；故障測距；電氣化鐵路
    中圖分類號：TM922.3     文獻(xiàn)標(biāo)識碼：A     文章編號：1007-3175(2023)01-0028-06
 
T-F Short-Circuit Fault Location and Simulation Research
Based on All-Parallel AT Power Supply Mode
 
LIU Jing
（CCCC Electromechanical Engineering Co., Ltd, Wuhan 430061, China）
 
    Abstract: AT traction power supply has been widely used in high-speed railway traction network. When short-circuit faults occur in the power supply system, if the faults are not removed and the power supply does not continue in a stable way as soon as possible, the normal operation of railway system could be affected and serious safety accidents could happen. In this paper, the traction power supply mode commonly used in high-speed railway-all-parallel AT power supply is introduced. The electrical calculation and theoretical analysis of T-F short-circuit faults happening in the traction network are carried out, and the principle of fault location based on “the current ratio of paralleling lines” is put forward, which is highly accurate and not affected by external factors. Then, according to the actual operating line, the author sets up parameters of the power supply traction network and establishes the simulation model in MATLAB. After making simulation analysis of the principle of short-circuit fault location, the simulated right results are obtained which verifies the correctness of the above theoretical analysis.
    Key words: AT traction power supply; T-F short-circuit; fault location; electrified railway
 
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