Fault Self-synchronization for Differential Protection in Distribution Networks Based on Reference Phasor

被引：0
|
作者：
Zhou C. [1 ]
Zou G. [1 ]
Zhang S. [1 ]
Wen X. [1 ]
Zheng M. [2 ]
Tian J. [3 ]
机构：
[1] Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education, Shandong University, Shandong Province, Jinan
[2] China Southern Power Grid Power Dispatching Control Center, Guangdong Province, Guangzhou
[3] Guangxi Power Grid Dispatching Control Center, Guangxi, Zhuang Autonomous Region, Nanning
来源：
Dianwang Jishu/Power System Technology | 2023年 / 47卷 / 09期
关键词：
differential protection; distribution network; fault self-synchronization; reference phasor;
D O I：
10.13335/j.1000-3673.pst.2022.1075
中图分类号：
学科分类号：
摘要：
The fault self-synchronization, taking the fault detection time for a reference, realizes the data synchronization of the differential protection in distribution networks at a low cost. However, its synchronization accuracy affected by the sensitivity of the fault detection algorithm, may have a large synchronization error under the extreme fault conditions. For this issue, an improved fault self-synchronization method based on the reference phasor is proposed in this paper. After the protection devices start, the reference phasors at a specific time before the fault are used to realize the error correction of the traditional fault self-synchronization. Without being affected by the fault detection delay and the channel delay, this method is able to realize the data synchronization that meets the requirements of differential protection in distribution networks that do not have any protection dedicated channels and external timing signals. The simulation results show that the synchronization accuracy of this method meets the requirement of differential protection in different types of feeders; it is not affected by the fault initial phase angles and the sampling frequency of the devices and has a strong anti-noise ability. © 2023 Power System Technology Press. All rights reserved.
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页码：3753 / 3761
页数：8
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