Phase Differential Protection Scheme of Active Distribution Network Based on Optical Current Transformer

被引：0
|
作者：
Liu S. [1 ]
Zhao Y. [1 ]
Wang B. [1 ]
Zhao W. [1 ]
You H. [1 ]
Nan T. [2 ]
机构：
[1] Key Laboratory of Intelligent Power Dispatching and Control of Ministry of Education, Shandong University, Jinan
[2] Guangzhou Power Supply Bureau of Guangdong Power Grid Co., Ltd., Guangzhou
来源：
Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2022年 / 46卷 / 22期
基金：
中国国家自然科学基金;
关键词：
active distribution network; data synchronization; distributed generator; optical current transformer; phase differential protection;
D O I：
10.7500/AEPS20211124002
中图分类号：
学科分类号：
摘要：
The access of distributed generators has changed the network structure and fault characteristics of distribution networks, which makes the traditional three-section current protection difficult to adapt. The pilot differential protection can effectively solve the problem of protection failure in active distribution networks, but there are problems of communication channel and data synchronization. Optical current transformer (OCT) has the characteristics of low power consumption and good electrical insulation, but it is difficult to be widely used in the distribution network due to the influence of temperature and other factors. A phase differential protection scheme of active distribution network based on OCT is proposed. The scheme converts current signal into light intensity signal through OCT, and then transmits the light intensity signal on the opposite end to the local end through optical fibers, which effectively solves the communication channel and data synchronization problems of pilot protection. The phase differential protection is adopted to avoid the influence of temperature and light source changes on the OCT. Finally, the feasibility of the proposed scheme is verified by simulation and dynamic simulation experiments. © 2022 Automation of Electric Power Systems Press. All rights reserved.
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收藏
页码：173 / 181
页数：8
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