面向韧性提升的配电网开关优化配置模型*

doi:10.11985/2020.03.017

摘要/Abstract

摘要：

安装开关设备能够提升配电网抵御极端灾害下大规模故障的能力,综合考虑分布式电源和可控负荷的作用,提出了面向韧性提升的配电网开关优化配置模型。首先,梳理了韧性、可靠性和自愈能力之间的关系,描述了配电网韧性的分析过程与量化方法;其次,考虑分布式电源和可控负荷的作用,提出了适用于多重故障的极端灾害下配电网停电负荷量计算方法,以韧性指标最大为目标建立了混合整数线性规划形式的配电网开关优化配置模型,并提出了开关优化配置的整体流程;最后,通过算例分析表明在配电网中安装开关能够与本地分布式电源和负荷削减手段相配合显著提升配电网韧性,减小灾害中负荷损失量。

关键词: 配电网, 韧性, 配电自动化, 开关优化配置, 配电孤岛

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

中图分类号:

TM727

赵晓琦,张智,姚琪,倪坤,马伟. 面向韧性提升的配电网开关优化配置模型^*[J]. 电气工程学报, 2020, 15(3): 128-134.

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.

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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