高鐵AT供電TFN故障對測距的影響
陳海軍1,王維北2
(1 廣州鐵路職業(yè)技術(shù)學(xué)院,廣東 廣州 510430;2 廣州鐵路集團(tuán)有限公司廣州供電段,廣東 廣州 501000)
摘 要:運(yùn)行中高鐵供電系統(tǒng)發(fā)生TFN故障,測距裝置提供的結(jié)果與實(shí)際情況有較大差異,并且斷路器跳閘時(shí)將事故范圍擴(kuò)大。通過實(shí)例分析,指出測距裝置沒有設(shè)置TFN故障的判據(jù),且TF故障判據(jù)整定值過小,將TFN故障錯(cuò)判為T型或F型故障,是產(chǎn)生偏差的原因??赏ㄟ^增大TF 型故障判據(jù)的電流數(shù)值,減少TF故障類型判斷的錯(cuò)誤,或考慮增設(shè)TFN故障類型判據(jù)。TN故障或FN故障,可能在斷路器重合閘時(shí)發(fā)展成為TFN故障,電抗法測距結(jié)果存在較大誤差,可用吸上電流比法計(jì)算輔助驗(yàn)證測距結(jié)果。根據(jù)每次故障實(shí)際情況修正Q -L特性表,不斷提高測距精度。同時(shí)合理設(shè)置變電所、AT所和分區(qū)所的保護(hù),選擇性跳開故障線路,縮小事故范圍。
關(guān)鍵詞:AT供電;故障;測距;偏差
中圖分類號:U226 文獻(xiàn)標(biāo)識碼:A 文章編號:1007-3175(2019)03-0046-05
Influence of TFN Fault on Distance Measurement of AT Feeding System of High Speed Railway
CHEN Hai-jun1, WANG Wei-bei2
(1 Guangzhou Railway Polytechnic, Guangzhou 510430, China;
2 Guangzhou Power Supply Section of China Railway Guangzhou Group Co., Ltd, Guangzhou 501000, China)
Abstract: When the TFN fault occurs in the high speed rail power supply system, the result provided by the location device is quite different from the actual situation, and the scope of the accident is enlarged when the circuit breaker tripped. The fault case analysis shows that the cause of the deviation is that the fault location device does not set the criterion of the TFN fault type, and the TF fault type criterion value is too small, and the TFN fault is misjudged to be type T or F type. By increasing the current value of the TF fault criterion, the error of TF fault type can be reduced, or the TFN fault type criterion can be added. TN fault or FN fault may develop into TFN fault when circuit breaker reclosing, the result of reactance method has great error at the moment, the current ratio method can be used to assist the verification of the ranging results. According to the actual situation of each fault, the Q-L characteristic table would be amended to improve the ranging accuracy continuously. And the protection scheme of substation, AT institute and subdivision should been rationally configured, the fault line will be selectively tripped to minimize the scope of the accident.
Key words: AT feeding system; fault; location; deviation
參考文獻(xiàn)
[1] 李崗,林國松,韓正慶. 新型AT供電牽引網(wǎng)故障測距方案[J]. 電力系統(tǒng)及其自動化學(xué)報(bào),2013,25(3):31-34.
[2] 馬燕寧. 全并聯(lián)AT雙邊供電方式的故障測距方法[J]. 石家莊鐵道大學(xué)學(xué)報(bào)( 自然科學(xué)版),2014,27(3):79-83.
[3] 張佩炯. 基于行波法的牽引網(wǎng)系統(tǒng)故障測距應(yīng)用研究[J]. 電工電氣,2015(2):17-21.
[4] 李衛(wèi)民,張吉斌. 一例誤差較大的AT吸上電流比測距報(bào)告分析[J]. 電氣化鐵道,2017(5):84-85.
[5] 田鋒,趙強(qiáng). 接觸網(wǎng)故障點(diǎn)距離測量方法對比分析[J]. 鐵道技術(shù)監(jiān)督,2016,44(2):37-41.
[6] 趙富強(qiáng),劉兵. 包神鐵路牽引網(wǎng)故障測距計(jì)算及應(yīng)用[J]. 電氣化鐵道,2016(2):18-21.
[7] 王俊儒. 牽引接觸網(wǎng)故障測距應(yīng)用及準(zhǔn)確度調(diào)整淺析[J]. 電氣化鐵道,2013(4):16-19.
[8] 王彥榮,李文起,秦曉偉,等. 對京廣高鐵AT故標(biāo)問題的分析[J]. 電氣化鐵道,2015(1):1-4.
[9] 付振民. 蕭山2#牽引變電所杭州東方向故障測距分析[J]. 上海鐵道科技,2014(4):52-53.
[10] 林國松. 牽引供電系統(tǒng)新型保護(hù)與測距原理研究[D]. 成都:西南交通大學(xué),2010.
[11] 王榮熙. 京石武高鐵牽引變電所短路事故分析與探討[J]. 電氣開關(guān),2014,52(2):98-100.
[12] 霍中原. AT供電方式接觸網(wǎng)故障測距誤差分析及對策[J]. 中國鐵路,2017(5):37-41.
[13] 程宏波,王勛,宋志成,等. 一種考慮機(jī)車影響的接觸網(wǎng)故障測距方法[J]. 電力系統(tǒng)保護(hù)與控制,2012,40(21):25-29.
[14] 李永征,孫金華. 一種新型高鐵牽引供電饋線選擇性跳閘方案[J]. 電氣化鐵道,2017(4):37-39.