电工技术学报  2016, Vol. 31 Issue (24): 240-251    DOI:
电力系统 |
基于级联H桥变流器和dq变换的配电网故障柔性消弧方法
郭谋发1, 张伟骏2, 高伟1, 杨耿杰1, 缪希仁1
1. 福州大学电气工程与自动化学院 福州 350116;
2. 国网福建省电力有限公司电力科学研究院 福州 350007
Fault Flexible Arc Suppression Approach Based on Cascaded H-Bridge Converters and dq Coordinate Transformation for Distribution Network
Guo Moufa1, Zhang Weijun2, Gao Wei1, Yang Gengjie1, Miao Xiren1
1. School of Electrical Engineering and Automation Fuzhou University Fuzhou 350116 China;
2. State Grid Fujian Electric Power Research Institute Fuzhou 350007 China
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摘要 为解决配电网单相接地故障消弧的难题,提出一种基于级联H桥变流器和dq变换的柔性消弧新方法。配电网的三相经级联H桥变流器接地,柔性控制非故障相变流器经连接电感注入电流,补偿接地点的电弧电流,抑制故障相恢复电压,促进电弧快速熄灭、不易重燃。为了实现对稳定性和间歇性电弧接地故障电流的全补偿,结合级联H桥变流器的特性,提出一种基于dq坐标变换的故障谐波及暂态电流分量的检测方法。根据级联H桥变流器注入电流对接地故障电流、故障相恢复电压的作用机理,研究各类电弧接地故障的统一柔性消弧方法,仿真结果表明所提消弧方法的有效性,可以提高配电网接地故障熄弧率,促进柔性交流输电(FACTS)技术在智能配电网接地故障保护中的研究与应用。
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郭谋发
张伟骏
高伟
杨耿杰
缪希仁
关键词 配电网接地故障级联H桥变流器柔性消弧dq坐标变换    
Abstract:To solve the problem of arc suppression under the single-phase grounding fault in distribution network, a novel approach based on cascaded H-bridge converters and dq reference frame transformation is proposed. A flexible grounding mode using three-phase cascaded H-bridge converter is firstly adopted in network. The current injected in non-fault phases can compensate the arc current at fault point and suppress the recovery voltage of fault phase. It could promote the rapid extinguishment of arc and make it restrike hardly. Then combined with the features of cascaded H-bridge converter, a new detecting method for harmonic and transient components of fault current based on dq reference frame transformation has been proposed. This method can realize the full current compensation in the cases of both stable and intermittent arc grounding faults. According to the mechanisms of current injected by cascaded H-bridge converter on fault current and fault phase recovery voltage, a unified arc suppression method about various arc grounding faults has been studied. Simulation results show the proposed approach is effective, which can improve arc extinguishment rate, promote the study and application of FACTS technique in grounding fault protection of smart power distribution network.
Key wordsDistribution    network,    grounding    fault,    cascaded    H-bridge    converters,    fault    arc    suppression,    dq    coordinate    transformation   
收稿日期: 2016-01-16      出版日期: 2017-01-03
PACS: TM713  
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、配电网及其自动化技术等。E-mail: 610710809@qq.com(通信作者)张伟骏 男,1990年生,硕士,工程师,研究方向为配电网及其自动化技术。E-mail: 14158755@qq.com
引用本文:   
郭谋发, 张伟骏, 高伟, 杨耿杰, 缪希仁. 基于级联H桥变流器和dq变换的配电网故障柔性消弧方法[J]. 电工技术学报, 2016, 31(24): 240-251. Guo Moufa, Zhang Weijun, Gao Wei, Yang Gengjie, Miao Xiren. Fault Flexible Arc Suppression Approach Based on Cascaded H-Bridge Converters and dq Coordinate Transformation for Distribution Network. Transactions of China Electrotechnical Society, 2016, 31(24): 240-251.
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https://dgjsxb.ces-transaction.com/CN/Y2016/V31/I24/240