基于5G通信的有源配电网多点同步保护方案

doi:10.11930/j.issn.1004-9649.202304099

摘要/Abstract

摘要：

基于遥信数据的线性区段定位方法没有考虑通信时延和可靠性的影响，且仅适用于大电流故障和单重故障，对此，提出一种基于5G通信的有源配电网多点同步保护方案。首先，建立基于5G通信的区段定位通信架构，并分析其通信时延和可靠性；其次，在分析暂态零序电流方向分布特点的基础上，对开关函数重新进行定义，提出一种适用于小电流故障的逻辑关系定位模型；然后，采用左右逼近方法，将根据逻辑关系建立的开关函数线性化，最终使得线性化后的逻辑关系定位模型不仅适用于单重故障，而且适用于多重故障；最后，基于不同拓扑结构和5G通信的有源配电网算例对所提保护方案进行了验证，结果表明所提方案不仅能够实现多点同步保护，而且适用于小电流故障和多重故障。

关键词: 有源配电网, 同步保护, 5G通信, 小电流故障, 多重故障, 暂态零序电流

Abstract:

The linear section location method based on remote signaling data does not consider the influence of communication time-delay and reliability, and is only applicable to large current faults and single faults. In this regard, a multi-point synchronous protection scheme for active distribution network based on 5G communication is proposed. Firstly, a section location communication architecture based on 5G communication is established, and its communication time-delay and reliability are analyzed. Secondly, on the basis of analyzing the direction distribution characteristics of the transient zero-sequence current, the switching function is redefined, and a logical relationship location model suitable for small current faults is proposed. Then, using the left-right approximation method, the switching function established according to the logic relationship is linearized, which makes the linearized logic relationship location model not only suitable for single faults, but also for multiple faults. Finally, the proposed protection scheme is validated in an active distribution network with different topologies and 5G communication. The results show that the proposed scheme can not only realize multi-point synchronous protection, but also be applicable to both small current faults and multiple faults.

Key words: active distribution network, synchronous protection, 5G communication, small current fault, multiple faults, transient zero-sequence current

中图分类号:

TM773

李铁成, 范辉, 臧谦, 任江波, 张卫明, 王义波. 基于5G通信的有源配电网多点同步保护方案[J]. 中国电力, 2023, 56(11): 113-120.

Tiecheng LI, Hui FAN, Qian ZANG, Jiangbo REN, Weiming ZHANG, Yibo WANG. Multi-point Synchronous Protection Scheme for Active Distribution Network Based on 5G Communication[J]. Electric Power, 2023, 56(11): 113-120.

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链接本文: https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202304099

https://www.electricpower.com.cn/CN/Y2023/V56/I11/113

图/表 11

参考文献 29

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通信过程	类型	通信过程	类型
0→1	误报	1→1	正常
1→0	漏报	0→0	正常

通信过程	类型	通信过程	类型
0→1	误报	1→1	正常
1→0	漏报	0→0	正常

节点	稳态零序电流方向	节点稳态状态编码	暂态零序电流方向	节点暂态状态编码
S1	–	1	–	1
S2	–	1	–	1
S3	–	1	–	1
S4	+	0	+	0
S5	+	0	+	0
S6	–	1	–	1
S7	+	0	+	0

节点	稳态零序电流方向	节点稳态状态编码	暂态零序电流方向	节点暂态状态编码
S1	–	1	–	1
S2	–	1	–	1
S3	–	1	–	1
S4	+	0	+	0
S5	+	0	+	0
S6	–	1	–	1
S7	+	0	+	0

模型	故障线路位置	漏误报节点位置	线路定位结果
本文	2	无漏误报	2
文献[18]	2	无漏误报	无法定位
文献[22]	2	无漏误报	无法定位
本文	5	S2	5
文献[18]	5	S2	无法定位
文献[22]	5	S2	无法定位
本文	6	S4	6
文献[18]	6	S4	无法定位
文献[22]	6	S4	无法定位