Optimal Configuration Model of Switch for Distribution Network Based on Resilience Improvement

doi:10.11985/2020.03.017

Abstract

Abstract:

The installation of switch equipment can improve the ability of the distribution network to withstand large-scale failures under extreme disasters. Therefore, an optimal configuration model for distribution network switches that improves resilience is proposed with comprehensive consideration of the role of distributed power and controllable loads. First, the relationship between resilience, reliability, and self-healing ability is sorted out, and the analysis process and quantification method of the resilience are described. Secondly, considering the role of distributed generation and controllable loads, a calculation method for power outage load in distribution networks with multiple faults is proposed. The optimal configuration model of distribution network switches is established in the form of mixed integer linear programming with the goal of maximum resilience index, and the overall process of switch optimal configuration is proposed. Finally, an example analysis shows that the switch installation in the distribution network can work with distributed generation and load reduction methods to significantly improve the resilience and reduce the amount of load loss in extreme disaster.

Key words: Distribution network, resilience, distribution automation, switch optimized configuration, distribution island

CLC Number:

TM727

ZHAO Xiaoqi,ZHANG Zhi,YAO Qi,NI Kun,MA Wei. Optimal Configuration Model of Switch for Distribution Network Based on Resilience Improvement[J]. Journal of Electrical Engineering, 2020, 15(3): 128-134.

Figures/Tables 9

References 20

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内容	韧性	自愈能力	可靠性
时间尺度	小时	毫秒、秒、分钟	年
故障持续时间	配电网受极端灾害影响时间	主要针对短时故障,配电网动作时间很短	故障隔离和修复时间
故障类型与影响范围	主要为多重故障,影响范围大	主要为单重故障,影响范围小	主要为单重故障,影响范围小
发生概率	与极端事件的发生频率相关,发生概率小	与元件故障率相关,发生概率大	与元件故障率相关,发生概率大
应用地点	极端灾害多发区域的配电网	所有配电网	所有配电网

场景	DG有功/kW	DG无功/kVar	负荷削减方式
一	0	0	方式1
二	0	0	方式1、方式2
三	300	300	方式1
四	300	300	方式1、方式2
五	600	600	方式1
六	600	600	方式1、方式2

场景	开关位置
一	2B-7B-16B-19B-23B
二	2B-7B-16B-19B-23B
三	6B-10B-14E-17B-23B
四	6B-10B-14E-17B-23B
五	6B-10B-14E-17B-23B
六	5B-8B-14E-17B-23B

场景	开关位置
一	2B-4B-6B-7B-10B-13B-16B-17B-19B-23B
二	2B-4B-6B-7B-10B-13B-16B-17B-19B-23B
三	2B-6B-10B-14E-16B-19B-19E-22E-23B-23E
四	2B-6B-10B-14E-16B-19B-19E-22E-23B-23E
五	2B-5B-6E-10B-14E-16B-19B-19E-22E-23B
六	2B-3E-6B-10B-14E-16B-19B-19E-22E-23B