基于高频信号的输电线路主动式保护

解超; 李凤婷; 王彦鹏; 王洪涛

引用本文:	解超,李凤婷,王彦鹏,等.基于高频信号的输电线路主动式保护[J].电力系统保护与控制,2017,45(7):6-12.
	XIE Chao,LI Fengting,WANG Yanpeng,et al.An active protection of transmission line based on high-frequency signal[J].Power System Protection and Control,2017,45(7):6-12

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基于高频信号的输电线路主动式保护
解超¹,李凤婷¹,王彦鹏²,王洪涛²
(1.可再生能源发电与并网技术教育部工程研究中心(新疆大学)，新疆乌鲁木齐 830047; 2.国网新疆电力公司经济技术研究院，新疆乌鲁木齐 830011)

摘要:

现行输电线路的故障类型和故障性质判别均依据线路中电气量的变化特征被动判断,对于某些线路运行状况，往往因缺乏主动性而造成保护误动或拒动。针对这个问题，借鉴纵差保护输电线载波通信技术，分析高频信号在输电线路各种故障时的传播特性，提出了一种基于高频信号的输电线路主动式保护。该保护通过向输电线路发射高频信号，主动判断输电线路的故障类型和故障性质。仿真验证结果表明，这种输电线路主动式保护可以准确判断出输电线路中各种类型的故障，并通过延时循环判断，可靠区分瞬时性故障和永久性故障。

关键词: 高频信号主动式保护故障类型瞬时性故障永久性故障

DOI：10.7667/PSPC160479

分类号:

基金项目:国家自然科学基金资助项目(51267019，51467019)

An active protection of transmission line based on high-frequency signal

XIE Chao¹,LI Fengting¹,WANG Yanpeng²,WANG Hongtao²

(1. Engineering Research Center for Renewable Energy Power Generation and Grid Technology (Xinjiang University), Ministry of Education, Urumqi 830047, China;2. Economic Research Institute, State Grid Xinjiang Electric Power Company, Urumqi 830011, China)

Abstract:

Existing transmission line fault type and characteristic distinguishing methods are all based on variation features of electrical quantities passively, on some operation conditions, mal-operations or miss-operations are caused frequently because of lacking initiative. By drawing from power line carrier communication technology of longitudinal differential protection, and through analysis on transmission characteristics of high-frequency signal under various types of transmission line faults, an active protection scheme of transmission line based on high-frequency signal is proposed. The proposed protection scheme can distinguish fault type and characteristic actively by emitting high-frequency signal to transmission line. Results of simulation show that different types of faults can be detected by the proposed active protection scheme accurately, and through delayed cycle-judgment, temporary faults can be distinguished from permanent ones reliably. This work is supported by National Natural Science Foundation of China (No. 51267019 and No. 51467019).

Key words: high-frequency signal active protection fault type transient faults permanent faults

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