Identify the Participating Active Distribution Network Fault Recovery Strategy Based on the Nature of the Fault

doi:10.11930/j.issn.1004-9649.202503051

Abstract

Abstract:

The high proportion of new energy access brings a large impact on the operation mode of the distribution network, and also puts forward higher requirements for the fault strategy of the distribution network. The traditional reclosing device can not effectively judge the nature of the fault, which may cause the power system to suffer unnecessary secondary fault impact during the re operation. The adaptive reclosing is proposed, and the adaptive reclosing is involved in the fault rapid recovery strategy of the active distribution network. Firstly, the fault characteristics of the island after the circuit breaker tripping are analyzed, and the two criteria of fault nature identification are constructed; secondly, the time sequence coordination problem of fault detection time and re time is analyzed, and the distribution network fault recovery strategy applicable to the high proportion of new energy access is proposed; finally, the effectiveness of the proposed method is verified by simulation examples and the proposed method can speed up the system power supply recovery under the premise of ensuring that the distributed power supply does not fall off the network.

Key words: distribution network, distributed power generation, identification of the nature of the fault

YE Yuanbo, WANG Jiwen, SHAO Qingzhu, PING Xia, XU Ming, LI Wenzheng. Identify the Participating Active Distribution Network Fault Recovery Strategy Based on the Nature of the Fault[J]. Electric Power, 2025, 58(11): 175-185.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202503051

https://www.electricpower.com.cn/EN/Y2025/V58/I11/175

Figures/Tables 27

References 29

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故障类型	过渡电阻/Ω	检测时间/ms	检测结果	重合闸动作
瞬时性A相接地	5	40.4	瞬时性	重合闸
瞬时性A相接地	100	440	瞬时性	重合闸
永久性A相接地	5	340	永久性	闭锁重合闸
永久性A相接地	100	440	永久性	闭锁重合闸
瞬时性AB接地	5	45.6	瞬时性	重合闸
瞬时性AB接地	100	440	瞬时性	重合闸
永久性AB接地	5	340	永久性	闭锁重合闸
永久性AB接地	100	440	永久性	闭锁重合闸
瞬时性AB相间	5	440	瞬时性	重合闸
永久性AB相间	5	440	永久性	闭锁重合闸

故障类型	过渡电阻/Ω	检测时间/ms	检测结果	重合闸动作
瞬时性A相接地	5	40.4	瞬时性	重合闸
瞬时性A相接地	100	440	瞬时性	重合闸
永久性A相接地	5	340	永久性	闭锁重合闸
永久性A相接地	100	440	永久性	闭锁重合闸
瞬时性AB接地	5	45.6	瞬时性	重合闸
瞬时性AB接地	100	440	瞬时性	重合闸
永久性AB接地	5	340	永久性	闭锁重合闸
永久性AB接地	100	440	永久性	闭锁重合闸
瞬时性AB相间	5	440	瞬时性	重合闸
永久性AB相间	5	440	永久性	闭锁重合闸

故障位置	故障类型	过渡电阻/Ω	检测时间/ms	检测结果	重合闸动作
$ {f_1} $	瞬时性A相接地	5	41.2	瞬时性	重合闸
	瞬时性A相接地	100	440	瞬时性	重合闸
	永久性A相接地	5	340	永久性	闭锁重合闸
	永久性A相接地	100	440	永久性	闭锁重合闸
	瞬时性AB相间	5	440	瞬时性	重合闸
	永久性AB相间	5	440	永久性	闭锁重合闸
$ {f_2} $	瞬时性A相接地	5	40.4	瞬时性	重合闸
	瞬时性A相接地	100	440	瞬时性	重合闸
	永久性A相接地	5	340	永久性	闭锁重合闸
	永久性A相接地	100	440	永久性	闭锁重合闸
	瞬时性AB相间	5	440	瞬时性	重合闸
	永久性AB相间	5	440	永久性	闭锁重合闸
$ {f_3} $	瞬时性A相接地	5	42.4	瞬时性	重合闸
	瞬时性A相接地	100	440	瞬时性	重合闸
	永久性A相接地	5	340	永久性	闭锁重合闸
	永久性A相接地	100	440	永久性	闭锁重合闸
	瞬时性AB相间	5	440	瞬时性	重合闸
	永久性AB相间	5	440	永久性	闭锁重合闸

故障位置	故障类型	过渡电阻/Ω	检测时间/ms	检测结果	重合闸动作
$ {f_1} $	瞬时性A相接地	5	41.2	瞬时性	重合闸
	瞬时性A相接地	100	440	瞬时性	重合闸
	永久性A相接地	5	340	永久性	闭锁重合闸
	永久性A相接地	100	440	永久性	闭锁重合闸
	瞬时性AB相间	5	440	瞬时性	重合闸
	永久性AB相间	5	440	永久性	闭锁重合闸
$ {f_2} $	瞬时性A相接地	5	40.4	瞬时性	重合闸
	瞬时性A相接地	100	440	瞬时性	重合闸
	永久性A相接地	5	340	永久性	闭锁重合闸
	永久性A相接地	100	440	永久性	闭锁重合闸
	瞬时性AB相间	5	440	瞬时性	重合闸
	永久性AB相间	5	440	永久性	闭锁重合闸
$ {f_3} $	瞬时性A相接地	5	42.4	瞬时性	重合闸
	瞬时性A相接地	100	440	瞬时性	重合闸
	永久性A相接地	5	340	永久性	闭锁重合闸
	永久性A相接地	100	440	永久性	闭锁重合闸
	瞬时性AB相间	5	440	瞬时性	重合闸
	永久性AB相间	5	440	永久性	闭锁重合闸

比较项	传统重合闸	自适应重合闸
重合闸延时	经1.2 s后延时	延时时间在40~440 ms
故障性质识别能力	不具备	可以判断故障是瞬时性还是永久性
DG脱网情况	大部分都脱网	DG可以保持并网运行