考虑韧性提升的交直流配电网线路加固和储能配置策略

doi:10.16183/j.cnki.jsjtu.2021.279

摘要/Abstract

摘要：

线路加固和储能配置是灾前规划性防御策略的重要组成部分,可以有效提升交直流混合配电网防灾应急能力.在极端事件频发的背景下提出了考虑线路加固和储能资源配置的交直流混合配电网韧性提升方法,构建两阶段鲁棒优化模型.模型本质上为3层混合整数非线性规划问题,最外层为配电网主动行为,确定线路加固和储能配置策略;中间层为被动行为,确定极端事件发生后的最严重故障集;内层为配电网主动行为,确定灾中配电网故障应对和调度运行策略.基于嵌套列和约束生成算法(Nested Column and Constraint Generation, NC&CG)对3层混合整数线性规划模型进行求解.最后,以9节点直流配网和改进的IEEE-33节点含环交流配网耦合的交直流混合配电网为例进行仿真分析,结果表明所提方法可以有效提升配电网韧性,保障其在极端事件下安全可靠运行.

关键词: 韧性配电网, 交直流混合配电网, 两阶段鲁棒优化, 嵌套的列与约束生成法

Abstract:

Line hardening and energy storage configuration are important parts of the pre-disaster planning defense strategy, which can effectively improve the disaster prevention and emergency response capabilities of the hybrid AC-DC distribution system (HDS). Under the background of frequent extreme events, a method to improve the resilience of hybrid AC-DC distribution system considering line hardening and energy storage resource allocation is proposed, and a two-stage robust optimization model is constructed. Essentially, the model is a tri-level mixed integer nonlinear programming problem. The outer level evaluates the active behavior of HDS to determine the line hardening and energy storage system configuration strategies, the middle level determines the worst line failure set after the extreme event occurs, which is the passive behavior of HDS, and the inner level evaluates the active behavior of HDS to determine the emergency response and the operation strategies. Based on the nested column and constraint generation algorithm (nested column and constraint generation, NC&CG), the 3-level mixed integer linear programming model is solved. Finally, a simulation analysis is conducted with a 9-node DC distribution network and an improved IEEE-33 node hybrid AC-DC distribution system coupled with a ring AC distribution network as an example. The results show that the proposed method can effectively improve the resilience of the distribution network and ensure its safe and reliable operation in extreme events.

Key words: resilient distribution system, hybrid AC-DC distribution system, two-stage robust optimization, nested column-and-constraint method

中图分类号:

TM732

周士超, 刘晓林, 熊展, 王旭, 蒋传文, 张沈习. 考虑韧性提升的交直流配电网线路加固和储能配置策略[J]. 上海交通大学学报, 2021, 55(12): 1619-1630.

ZHOU Shichao, LIU Xiaolin, XIONG Zhan, WANG Xu, JIANG Chuanwen, ZHANG Shenxi. Line Hardening and Energy Storage System Configuration Strategies for Resilience Enhancement of a Hybrid AC-DC Distribution System[J]. Journal of Shanghai Jiao Tong University, 2021, 55(12): 1619-1630.

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参数	取值
可配置的额定功率上限P^R,max/kW	400
可配置的容量上限E^R,max/(kW·h)	800
单位功率配置成本c^p/(元·kW^-1)	1050^[13]
单位容量配置成本c^e/[元·(kW·h)^-1]	3000^[13]
充电效率η^ch	0.9
放电效率η^dis	0.9
单位充电成本c^ch/[元·(kW·h)^-1]	0.2
单位放电成本c^ch/[元·(kW·h)^-1]	0.2
储能最大配置数量	5
初始SOC	0.85
SOC上限	0.9
SOC下限	0.1

负荷类型	切负荷成本/[元·(kW·h)^-1]
一级负荷	2500
交流配网其他负荷	100
直流配网负荷	20

场景	故障集合	线路加固策略	储能配置节点	目标函数值/万元
1	19-20, 4-5, 6-26, 29-30, 30-31, 2-19	-	-	1965.7
2	19-20, 3-4, 17-18, 16-17, 9-10, 10-11	4-5, 29-30, 28-29	-	1765.3
3	19-20, 3-4, 30-31, 15-16, 5-6, 12-13	-	4, 10, 17, 28, 29	1098.7
4	19-20, 3-4, 30-31, 15-16, 5-6, 27-28	4-5, 29-30, 28-29	10, 17	804.0

场景	一级负荷减载量/ (kW·h)	交流配网其他负荷减载量/ (kW·h)	直流配网负荷减载量/ (kW·h)
1	1137.6	10791.6	828.7
2	858.2	7323.3	3372.1
3	0	15719.8	919.7
4	0	13156.9	1705.3

储能配置节点	P^R/kW	E^R(kW·h)	配置成本/万元
4	88.5	588.7	185.9
10	90.7	613.2	193.5
17	83.5	561.9	177.3
28	83.1	545.9	172.5
29	98.2	660.1	208.3