引用本文:邵文权,吉玥,张志华.利用单一电流模量波形互相关系数的故障选相方案[J].电力系统保护与控制,2017,45(7):90-96.
SHAO Wenquan,JI Yue,ZHANG Zhihua.A faulted phase selection scheme using waveform cross-correlation coefficient of single-mode current[J].Power System Protection and Control,2017,45(7):90-96
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利用单一电流模量波形互相关系数的故障选相方案
邵文权1,吉 玥1,张志华2
(1.西安工程大学电子信息学院，陕西 西安 710048;2.国网陕西省电力公司电力科学研究院，陕西 西安 710054)
摘要:
为了快速识别引起电压暂降的故障相别，提出一种仅利用单一电流模量波形特征的故障选相方案。采用一种新的相模变换矩阵实现了全部故障类型下电流1模、2模量均不为零，以1模电流时域波形为基准，利用三相相电流及其组合电流与1模电流波形互相关系数的不同特征实现故障相的识别。PSCAD仿真计算结果表明，利用单一电流模量的波形特征的故障选相方法是有效和正确的，能够在不同过渡电阻、故障位置及故障相角等情况下快速准确的故障选相，为实施按相电压暂降补偿提供依据。
关键词:  短路故障  故障选相  相模变换  单一模量  互相关系数
DOI：10.7667/PSPC160515
分类号:
基金项目:西安工程大学博士启动基金资助项目(BS1018);西安工程大学青年学术骨干支持计划
A faulted phase selection scheme using waveform cross-correlation coefficient of single-mode current
SHAO Wenquan1,JI Yue1,ZHANG Zhihua2
(1. Department of Electronic and Information, Xi’an Polytechnic University, Xi’an 710048, China;2. Electric Power Research Institute, State Grid Shaanxi Electric Power Company, Xi’an 710054, China)
Abstract:
In order to quickly detect faulted phase in condition of voltage sags for distribution network, this paper proposes a faulted phase selection scheme using waveform characteristic of single-mode current. It uses a novel phase mode transformation matrix to achieve that mode 1 and 2 are not zero in all faulted types, and then taking mode 1 as reference, adopts waveform cross-correlation coefficient characteristics of three-phase current and its combined current and mode 1 current to achieve fault phase identification. PSCAD simulation results indicate that the proposed method is correct and effective, and can quickly and accurately identify faulted types under different fault conditions such as different fault locations, fault resistances and fault inception angles, which provides the basis of implementing phase voltage sag compensation. This work is supported by Doctoral Initial Fund of Xi’an Polytechnic University (No. BS1018) and Youth Academic Backbone Support Program of Xi’an Polytechnic University.
Key words:  short-circuit  faulted phase selection  phase mode transformation  single mode  cross-correlation coefficient
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