基于三相级联H桥变流器的配电网接地故障分相柔性消弧方法

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摘要

中性点非有效接地配电网长期存在单相接地故障消弧难题,传统柔性消弧方法利用实时检测的电源电压计算注入补偿电流值,通过控制连接于配电网中性点的单个有源逆变器实现消弧,已有方法需进行故障选相并且逆变器需通过Z型变压器及升压变接入配电网。提出基于三相级联H桥变流器的配电网接地故障分相柔性消弧新方法,三相级联H桥变流器通过连接电感直接挂接在各相线,发生接地故障时,利用实时检测的相电压计算注入补偿电流值,分相控制级联H桥变流器注入补偿电流,控制故障点电压为零,实现接地故障消弧。仿真结果表明该方法可灵活、有效地补偿接地故障电流,抑制接地故障电弧重燃。且采用单相或三相级联H桥变流器进行故障消弧时,不需要进行故障选相。

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	郭谋发
	游建章
	张伟骏
	杨耿杰
	缪希仁

关键词 ：配电网, 单相接地故障, 分相柔性消弧, 级联H桥变流器

Abstract：

Arc extinguishing of grounding faults is difficult for neutral non-effective grounding distribution networks.In traditional flexible arc-suppression method,the real-time measured source voltage is used to calculate the compensation current,which is injected by single active converter connected to the neutral point in distribution networks to compensate the fault current.Whereas,the zigzag transformer and the boosting transformer are used for converter to integrate into the power distribution network and faulty phase detection is necessary.In order to improve the above mentioned way,a novel method for earth-fault separate-phase flexible arc-suppression in distribution systems based on three-phase cascaded H-bridge converteris proposed in this paper.The three-phase cascaded H-bridge converters are connected to the distribution networks directly inductance.When a single-phase-to-ground fault occurred,the real-time measured phase voltage is used to calculate the compensation current.Then,the compensation current is injected by the three-phase cascaded H-bridge converter without the zigzag transformer and the boosting transformer.Therefore,the voltage of the fault phase is controlled to be zero and the fault arc is suppressed.The simulation verifies that the proposed principle is able to compensate the fault current flexibly and effectively,and restrain the restriking of earth-fault arc.Furthermore,faulty phase detection is unnecessary for single-phase or three-phase cascaded H-bridge converter to suppress the fault arc.

Key words： Distribution networks single phase to ground fault separat-phase flexible arc-suppression cascade H-bridge converter

收稿日期: 2015-05-26 出版日期: 2016-09-18

PACS:

TM726.1

基金资助:

国家自然科学基金(51377023,51677030)和福建省自然科学基金(2016J01218)资助项目。

作者简介: 郭谋发男,1973年生,硕士,副教授,研究方向为电力系统自动化。E-mail:gmf@fzu.edu.cn(通信作者);游建章男,1990年生,硕士研究生,研究方向为配电网自动化。E-mail:282304815@qq.com

引用本文:

郭谋发,游建章,张伟骏,杨耿杰,缪希仁. 基于三相级联H桥变流器的配电网接地故障分相柔性消弧方法[J]. 电工技术学报, 2016, 31(17): 11-22. Guo Moufa,You Jianzhang,Zhang Weijun, Yang Gengjie, Miao Xiren. Separate-Phase Flexible Arc-Suppression Method of Earth-Fault in Distribution Systems Based on Three-Phase Cascaded H-Bridge Converter. Transactions of China Electrotechnical Society, 2016, 31(17): 11-22.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2016/V31/I17/11

[1] 要焕年,曹梅月.电力系统谐振接地[M].北京:中国电力出版社,2000.
[2] 曾祥君,王媛媛,李健,等.基于配电网柔性接地控制的故障消弧与馈线保护新原理[J].中国电机工程学报,2012,32(16):137-143.
Zeng Xiangjun,Wang Yuanyuan,Li Jian,et al.Novel principle of faults arc extinguishing & feeder protection based on flexible grounding control for distribution networks[J].Proceedings of the CSEE,2012,32(16):137-143.
[3] 程路,陈乔夫,张宇,等.基于变压器可控负载原理的新型消弧线圈[J].电力系统自动化,2006,30(21):77-81.
Cheng Lu,Chen Qiaofu,Zhang Yu,et al.Novel arc-suppression coil based on the theory of transformer with controllable load[J].Automation of Electric Power Systems,2006,30(21):77-81.
[4] 王异凡,陈国柱,张曙.一种连续磁阀式消弧线圈及其数学模型[J].电工技术学报,2014,29(5):239-245.
Wang Yifan,Chen Guozhu,Zhang Shu.A continuously magnetic valve arc-suppression coil and its modeling[J].Transactions of China Electrotechnical Society,2014,29(5):239-245.
[5] 陈忠仁,吴维宁,张勤,等.调匝式消弧线圈自动调谐新方法[J].电力系统自动化,2005,41(5):75-78.
Chen Zhongren,Wu Weining,Zhang Qin,et al.New automatic tuning method for multi-tap arc-suppression coil[J].Automation of Electric Power Systems,2005,41(5):75-78.
[6] 陆国庆,姜新宇,欧阳旭东,等.高短路阻抗变压器式自动快速消弧系统——配电网中性点新型接地方式的实现[J].电网技术,2000,24(7):25-28.
Lu Guoqing,Jiang Xinyu,Ouyang Xudong,et al.An automatic rapid arc suppression system based on transformer with high short circuit impedance:implementation of a new approach of neutral grounding for distribution network[J].Power System Technology,2000,24(7):25-28.
[7] 刘味果,赵邈,毛柳明,等.基于高漏抗式消弧线圈的配电网单相接地故障状态辨识[J].电工技术学报,2015,30(3):28-35.
Liu Weiguo,Zhao Miao,Mao liuming,et al.Identification of distribution network’s grounding status based on transformer-based arc suppression coil[J].Transactions of China Electrotechnical Society,2015,30(3):28-35.
[8] 陈柏超,王朋,沈伟伟,等.电磁混合式消弧线圈的全补偿故障消弧原理及其柔性控制策略[J].电工技术学报,2015,30(10):311-318.
Chen Baichao,Wang Peng,Shen Weiwei,et al.The principle of full compensation arc suppression and flexible control of electromagnetic hybrid petersen coil[J].Transactions of China Electrotechnical Society,2015,30(10):311-318.
[9] 曲轶龙,董一脉,谭伟璞,等.基于单相有源滤波技术的新型消弧线圈的研究[J].继电器,2007,35(3):29-33.
Qu Yilong,Dong Yimai,Tan Weipu,et al.Research on new type arc-suppression coil based on single-phase active power filter technology[J].Relay,2007,35(3):29-33.
[10]王崇林,刘建华.三相五柱式消弧线圈及其自动跟踪补偿原理[J].中国矿业大学学报,1999,28(5):57-61.
Wang Chonglin,Liu Jianhua.Arc suppression coil with three phases and five columns and its automatic compensation principle[J].Journal of China University of Mining & Technology,1999,28(5):57-61.
[11]曾祥君,胡京莹,王媛媛,等.基于柔性接地技术的配电网三相不平衡过电压抑制方法[J].中国电机工程学报,2014,34(4):678-684.
Zeng Xiangjun,Hu Jingying,Wang Yuanyuan,et al.Suppressing method of three-phase unbalanced overvoltage based on distribution networks flexible grounding control[J].Proceedings of the CSEE,2014,34(4):678-684.
[12]曾祥君,黄明玮,王文,等.配电网三相不平衡过电压有源抑制方法研究[J].电工技术学报,2015,30(9):61-69.
Zeng Xiangjun,Huang Mingwei,Wang Wen,et al.Research on active suppression method of three-phase unbalanced overvoltage for distribution networks[J].Transactions of China Electrotechnical Society,2015,30(9):61-69.
[13]刘维功,薛永端,徐丙垠,等.可适应线路结构动态变化的有源消弧算法[J].电网技术,2014,38(7):2008-2013.
Liu Weigong,Xue Yongduan,Xu Bingyin,et al.An active arc-suppression algorithm adaptable to dynamic structure variation of transmission line[J].Power System Technology,2014,38(7):2008-2013.
[14]李晓波.柔性零残流消弧线圈的研究[D].徐州:中国矿业大学,2010.
[15]贾晨曦,杨龙月,杜贵府.全电流补偿消弧线圈关键技术综述[J].电力系统保护与控制,2015,43(9):145-154.
Jia Chenxi,Yang Longyue,Du Guifu.Review of key technologies on full current compensation arc suppression coil[J].Power System Protection and Control,2015,43(9):145-154.
[16]李涛,苗晓鹏,李晓波.基于恒定零序电压幅值的消弧线圈调谐新方法[J].电力系统保护与控制,2014,42(9):86-90.
Li Tao,Miao Xiaopeng,Li Xiaobo.A new tuning method of arc suppression coil based on the constant zero-sequence voltage amplitude[J].Power System Protection and Control,2014,42(9):86-90.
[17]桑振华,苗晓鹏,李晓波,等.基于调相法的消弧线圈自动跟踪补偿的测量方法[J].电力系统保护与控制,2014,42(10):104-107.
Sang Zhenhua,Miao Xiaopeng,Li Xiaobo,et al.A new measurement method of automatic tracking compensation arc-suppression coil based on the phase modulation[J].Power System Protection and Control,2014,42(10):104-107.
[18]江友华,曹以龙,龚幼民.基于载波相移角度的级联型多电平变频器输出性能的研究[J].中国电机工程学报,2007,27(1):76-81.
Jiang Youhua,Cao Yilong,Gong Youmin,et al.Research on the cascade multilevel inverter based on different carrier phase-shifted angle[J].Proceedings of the CSEE,2007,27(1):76-81.
[19]吴洪洋,何湘宁.级联型多电平变换器PWM控制方法的仿真研究[J].中国电机工程学报,2001,21(8):43-47.
Wu Hongyang,He Xiangning.Research on PWM control of a cascade multilevel converter[J].Proceedings of the CSEE,2001,21(8):43-47.
[20]王志冰,于坤山,周孝信.H桥级联多电平变流器的直流母线电压平衡控制策略[J].中国电机工程学报,2012,32(6):56-63.
Wang Zhibing,Yu Kunshan,Zhou Xiaoxin.Control strategy for DC bus voltage balance in cascaded H-bridge multilevel converters[J].Proceedings of the CSEE,2012,32(6):56-63.
[21]李建林,赵栋利,赵斌,等.载波相移SPWM级联H型变流器及其在有源电力滤波器中的应用[J].中国电机工程学报,2006,26(10):109-113.
Li Jianlin,Zhao Dongli,Zhao Bin,et al.Cascade H-bridge converter with carrier phase shifted SPWM technique and its application in active power filter[J].Proceedings of the CSEE,2006,26(10):109-113.