Research and Application of Control Strategy Optimization for Regional Standby Automatic Switching System of Petal-Type Distribution Network

doi:10.11930/j.issn.1004-9649.202303060

Abstract

Abstract:

In view of the problem that the regional sandby automatic switching system will not be able to realize the “petal” power supply restoration if the fault cannot be reliably isolated by protection, when fault occurs with the petal-type distribution network, a new control strategy for the regional standby automatic switching system is thereby proposed based on the idea of control strategy equation. The new control strategy actively carries out fault isolation and realizes, through information exchange between adjacent switch rooms, the “petal” function of restoring power supply and the intelligent load switching function in each switch room in case of line overload after power supply restoration. The information exchange also ensures the effectiveness of the load switching function of the safety and stability system. At the same time, this paper proposes a backup protection locked by the main protection, which solves the setting and coordination difficulty of the backup protection and the large workload during the operation of the “petal” inner closed loop. The field application has verified the effectiveness of the proposed new control strategy, which has certain reference significance for the research of the control strategy of the regional standby automatic switching system in other distribution networks.

Key words: petal-type distribution network, regional standby automatic switching system, control strategy, information exchange, intelligent load switching

Baocheng FENG, Zhen JIN, Wei HOU, Guangfu XU. Research and Application of Control Strategy Optimization for Regional Standby Automatic Switching System of Petal-Type Distribution Network[J]. Electric Power, 2024, 57(1): 244-254.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202303060

https://www.electricpower.com.cn/EN/Y2024/V57/I1/244

Figures/Tables 16

Fig.1 Petal-type regional distribution network

Fig.2 The main wiring diagram of petal-shape distribution network

Fig.3 The flow diagram of signal with or without open loop point

Fig.4 The flow diagram of charge complete signal

Fig.5 The flow diagram of discharge signal

Fig.6 The flow diagram of switch room voltage loss signal

Fig.7 The flow diagram of fault isolation signal

Fig.8 The flow diagram of overload shedding signal after automatic standby switch action

Fig.9 The logic diagram of standby automatic switch control strategy in the closed-loop switch room area

Fig.10 The logic diagram of standby automatic switch control strategy in the open-loop switch room area

Fig.11 The main wiring diagram of petal inner closing loop operation

Fig.12 The main wiring diagram of petal inner opening loop operation

Fig.13 The main wiring diagram of on-site petal-type distribution network

Fig.14 The fault action waveform of standby automatic switching system in bus bar of station A

Fig.15 The fault action waveform of standby automatic switching system in line L2 and bus bar of station C

Fig.16 The fault action waveform of standby automatic switching system in line L2 and L6

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