|本期目录/Table of Contents|

[1]吕新东,单 强,刘 辉,等.三相不平衡对剩余电流保护器误动的影响分析[J].工业仪表与自动化装置,2022,(02):81-85.[doi:10.19950/j.cnki.cn61-1121/th.2022.02.017]
 Lü Xindong,SHAN Qiang,LIU Hui,et al.Analysis of mal-operation of residual current device arose by three-phase imbalance[J].Industrial Instrumentation & Automation,2022,(02):81-85.[doi:10.19950/j.cnki.cn61-1121/th.2022.02.017]
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三相不平衡对剩余电流保护器误动的影响分析

《工业仪表与自动化装置》[ISSN:1000-0682/CN:61-1121/TH]

卷:
期数:
2022年02期
页码:
81-85
栏目:
出版日期:
2022-04-15

文章信息/Info

Title:
Analysis of mal-operation of residual current device arose by three-phase imbalance
文章编号:
1000-0682(2022)02-0000-00
作者:
吕新东1单 强1刘 辉1尹 涛1施金志2
(1.国网新疆电力有限公司,新疆 830000;2.西安交通大学,陕西 西安710049)
Author(s):
Lü Xindong1 SHAN Qiang1 LIU Hui1 YIN Tao1 SHI Jinzhi2
(1. State Grid Xinjiang Electric Power Corporation, Xinjiang 830000, China; 2. Xi’an Jiaotong University, Shaanxi Xi’an 710049, China)
关键词:
剩余电流保护器漏电流三相不平衡低压配电网
Keywords:
mal-operation of residual current device leakage current three-phase imbalance low-voltage distribution network
分类号:
TM743TM774
DOI:
10.19950/j.cnki.cn61-1121/th.2022.02.017
文献标志码:
A
摘要:
剩余电流保护器是低压系统保障人身以及设备安全的重要设备,但是谐波、三相不平衡等因素会导致剩余电流保护器发生频繁误动,甚至使其无法投入使用。针对低压配电网三相不平衡系统,综合考虑三相线路阻抗、漏阻抗及负载的不平衡情况,建立了三相不平衡系统漏电流仿真模型,然后在多种不平衡程度及负荷水平下,对系统的漏电流进行了仿真分析。结果表明,在三相线路阻抗或漏阻抗不平衡下,系统的漏电流很小;在三相负荷不平衡的情况下,系统的漏电流较大,且负荷水平及【】【】负荷不平衡度越高,漏电流越大。因此,负荷水平及负荷不平衡度是剩余电流保护器频繁误动原因之一。
Abstract:
Residual current device is an important equipment to ensure personal and equipment safety in low-voltage system. However, factors like harmonic, three-phase imbalance and so on will lead to its frequent mal-operation, and even make it unable to be put into use. Aiming at the three-phase imbalanced system of low-voltage distribution network, considering the three-phase line impedance, leakage impedance and load imbalance, the leakage current model of three-phase imbalanced system was established, and then the leakage current of the system under various imbalance degrees and load levels were simulated and analyzed as well. The results show that the residual current of the system is relatively low for imbalance in three-phase line impedance or leakage impedance while it presents high under three–phrase imbalanced load condition. Furthermore, the higher the load level and load imbalance degree are, the greater the leakage current is. As a consequence, load level and load imbalance degree are one of the reasons for frequent mal-operation of residual current device.

参考文献/References:

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 ZHOU Liankai,ZHANG Ying,FU Rui,et al.An accurate calculation method for leakage current of distribution lines[J].Industrial Instrumentation & Automation,2022,(02):112.[doi:10.19950/j.cnki.cn61-1121/th.2022.02.023]

备注/Memo

备注/Memo:
收稿日期:2021-12-09

基金项目:
国家自然科学基金面上项目资助(51977175)

作者简介:
吕新东(1971),男,山东,双学士,高级工程师,从事电力工程技术。Email:lvxindong@xj.sgcc.com.cn.
更新日期/Last Update: 1900-01-01