发变组主变高压侧非全相运行电气特征及其对保护的影响

曹雪兰; 李本瑜; 沈燕华; 陈海龙; 卢金龙; 刘艳东

引用本文:	曹雪兰,李本瑜,沈燕华,等.发变组主变高压侧非全相运行电气特征及其对保护的影响[J].电力系统保护与控制,2014,42(15):34-38.
	CAO Xue-lan,LI Ben-yu,SHEN Yan-hua,et al.Electrical characteristics of generator transformer high voltage side on open phase operationand its effect on protection[J].Power System Protection and Control,2014,42(15):34-38

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发变组主变高压侧非全相运行电气特征及其对保护的影响
曹雪兰¹, 李本瑜², 沈燕华¹, 陈海龙¹, 卢金龙¹, 刘艳东¹
1.许继电气股份有限公司，河南许昌 461000;2.云南电力调度控制中心，云南昆明 650011

摘要:

针对发电厂主变高压侧出线发生单相或两相接地故障，故障相切除后等待重合闸过程或主变高压侧出线一相或两相断线，发变组处于非全相运行状态，利用序分量法分析发电机机端电压、电流的特征，并根据录波数据进行验证，提出发变组非全相运行对发变组继电保护的影响。根据分析结果，提出发电机组在非全相运行时的注意事项及防范措施，保证发电机组安全可靠运行。

关键词: 非全相断线重合闸序分量

DOI：10.7667/j.issn.1674-3415.2014.15.006

分类号:

基金项目:

Electrical characteristics of generator transformer high voltage side on open phase operationand its effect on protection

CAO Xue-lan¹, LI Ben-yu², SHEN Yan-hua¹, CHEN Hai-long¹, LU Jin-long¹, LIU Yan-dong¹

1.XJ Electric Co., Ltd, Xuchang 461000, China;2.Yunnan Electric Power Dispatching Center, Kunming 650011, China

Abstract:

When the power transformer high voltage side outgoing line occurs single-phase or two-phase ground fault, in the process awaiting reclosing after the fault phase is cut off or the main transformer high voltage side outgoing line occurs one or two phase broken, generator transformer group is in the open phase running state. This paper analyzes the characteristics of voltage and current of generator using sequence component, verifies the analytical results according to the recorded data, and proposes the effect on generator transformer relay protection. According to the results of the analysis, it puts forward some attention and prevention measures on open phase operation, which is conducive to the safe and reliable operation of power system.

Key words: open phase break reclosing sequence component

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