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

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基于參數(shù)識別的小電流接地故障選線定位研究

來源:電工電氣發(fā)布時間:2018-08-16 10:16 瀏覽次數(shù):705
基于參數(shù)識別的小電流接地故障選線定位研究
 
劉哲1,呂鵬2,孫建東2
(1 國網(wǎng)南京供電公司,江蘇 南京 210019;2 國電南瑞科技股份有限公司,江蘇 南京 210061)
 
    摘 要:針對小電流接地故障選線定位存在的難題,建立了基于線路集中參數(shù)下的單相接地故障零序等效模型,通過分析各線路電氣量特征,把其等效為電容模型,根據(jù)求解的線路對地電容值判斷是否為故障線路。同時建立故障線路數(shù)學模型,利用零序電壓、電流數(shù)據(jù)求解模型參數(shù),依據(jù)所得參數(shù)計算故障點至母線的距離,從而實現(xiàn)接地點的精準定位。經(jīng)RTDS故障仿真和MATLAB數(shù)據(jù)處理驗證該方法正確可靠,選線定位精度高,且不受中性點接地方式和不穩(wěn)定電弧的影響,有較強的耐過渡電阻能力,滿足集故障識別、選線和定位為一體的自動化要求。
    關鍵詞:小電流接地故障;單相接地故障;選線定位;電容模型;參數(shù)識別;區(qū)段定位
    中圖分類號:TM711;TM862     文獻標識碼:A     文章編號:1007-3175(2018)08-0034-06
 
Study of Fault Line Selection and Fault Point Location in Small Current Neutral Grounding
Fault Based on Parameter Identification
 
LIU Zhe1, LV Peng2, SUN Jian-dong2
(1 State Grid Nanjing Power Supply Company, Nanjing 210019, China;2 State Grid NARI Technology Co., Ltd, Nanjing 210061, China)
 
    Abstract: Aiming at the problem existing in the route selection location of small current neutral grounding fault, this paper established the single-phase grounding fault zero-sequence equivalent model. Through analysis of the electrical characteristics of each line, it was equaled to a capacitance model. Based on the solution circuit, the judgment of grounded capacitance value would be made on whether it was a fault line. At the same time the mathematical model of fault line was established. The model parameters for fault lines could be solved with the zero sequence voltage and current. Based on the parameters of the fault, the distance from the fault point to bus bar could be calculated to realize the accurate location of the fault.This principle has been verified via a RTDS simulator and MATLAB data processed tool. The method above has higher reliability and better capability of the fault resistance endurance, which is free from the impact of neutral grounding modes and unstable fault arc. Particularly, it can be combined with fault identification, fault line selection and fault location, which is satisfying the automated requirements.
    Key words: small current neutral grounding fault; single-phase earth fault; route selection location; capacitance model; parameter identification; zone location
 
參考文獻
[1] 郭清滔,吳田. 小電流接地系統(tǒng)故障選線方法綜述[J]. 電力系統(tǒng)保護與控制,2010,38(2):146-152.
[2] 薛永端,李天友,李偉新,等. 小電流接地故障暫態(tài)分析及區(qū)段定位新方法[J]. 電力系統(tǒng)自動化,2014,38(23):101-107.
[3] 索南加樂,張超,王樹剛. 基于模型參數(shù)識別法的小電流接地故障選線研究[J]. 電力系統(tǒng)自動化,2004,28(19):65-70.
[4] 趙新紅,袁洪,車偉,等. 小波變換在小電流接地電弧故障選線中的應用[J]. 高電壓技術,2005,31(10):18-20.
[5] 平勇陳. 小電流接地系統(tǒng)單相接地故障選線方法的研究[J]. 華東電力,2014,42(7):1410-1414.
[6] 吳樂鵬,黃純,林達斌,等. 基于暫態(tài)小波能量的小電流接地故障選線新方法[J]. 電力自動化設備,2013,33(5):70-75.
[7] 薛永端,張秋鳳,顏廷純,等. 綜合暫態(tài)與工頻信息的諧振接地系統(tǒng)小電流接地故障選線[J]. 電力系統(tǒng)自動化,2014,38(24):80-85.
[8] 肖波,張顯,王西偉,等. 基于模糊神經(jīng)網(wǎng)絡的小電流接地系統(tǒng)單相接地故障定位研究[J]. 儀表技術與傳感器,2014(3):65-67.
[9] 陳奎,韋曉廣,陳景波,等. 基于樣本數(shù)據(jù)處理和ADABOOST的小電流接地故障選線[J]. 中國電機工程學報,2014,34(34):6228-6237.
[10] 高志鵬,張慧芬,孫旭娜. 注入半波直流的小電流接地故障選線定位方法[J]. 電力系統(tǒng)保護與控制,2013,41(13):139-145.
[11] 宋國兵,馬志賓,靳幸福,等. 基于參數(shù)識別的配電網(wǎng)單相接地故障區(qū)段定位方法:CN103454555A[P].2013-12-18.
[12] 李森,宋國兵,康小寧,等. 基于時域下相關分析法的小電流接地故障選線[J]. 電力系統(tǒng)保護與控制,2008,36(13):15-20.