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复杂和应涌流及其对电流差动保护的影响
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作者单位:

(1. 广东电网公司电力科学研究院, 广东省广州市 510800; 2. 电力安全与高效湖北省重点实验室, 华中科技大学, 湖北省武汉市 430074; 3. 强电磁工程与新技术国家重点实验室, 华中科技大学, 湖北省武汉市 430074)

摘要:

目前大多数和应涌流机理分析采用运行变压器空载模型,对运行变压器非空载情况下的复杂和应涌流研究较为有限。文中推导了当一台变压器空投、另一台变压器非空载运行时,变压器磁链、电源电流以及运行变压器负载电流的解析表达式,分析了复杂和应涌流的影响因素、关键特征以及对相邻发电机电流差动保护的影响。数字仿真、动模试验以及现场录波数据验证了分析结论的正确性。

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Complex Sympathetic Inrush and Its Influence on Current Differential Protection
Author:
Affiliation:

(1. Electric Power Research Institute of Guangdong Power Grid Corporation, Guangzhou 510800, China; 2. Electric Power Security and High Efficiency Laboratory, Huazhong University of Science and Technology, Wuhan 430074, China;3. State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China)

Abstract:

Currently the analysis of sympathetic inrush mechanism is usually based on no-load operating transformers. The complex sympathetic inrush when a transformer operates with load is studied less often. The analytical expressions for the transformers flux linkages, the source and load current, when one no-load transformer is energized and the other is operating with load, are derived to obtain the influencing factors and key characteristics of the complex sympathetic inrush. Besides, the impact of sympathetic inrush on the current differential protection for generators is analyzed. Digital simulation, dynamic simulation test, and the on-site recorded data have proved the validity.

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引用本文
[1]王奕,戚宣威,罗航,等.复杂和应涌流及其对电流差动保护的影响[J].电力系统自动化,2014,38(6):98-105. DOI:10.7500/AEPS20130531012.
WANG Yi, QI Xuanwei, LUO Hang, et al. Complex Sympathetic Inrush and Its Influence on Current Differential Protection[J]. Automation of Electric Power Systems, 2014, 38(6):98-105. DOI:10.7500/AEPS20130531012.
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  • 收稿日期:2013-05-31
  • 最后修改日期:2014-02-20
  • 录用日期:2013-12-06
  • 在线发布日期: 2014-02-17
  • 出版日期:
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