Line Hardening and Energy Storage System Configuration Strategies for Resilience Enhancement of a Hybrid AC-DC Distribution System

doi:10.16183/j.cnki.jsjtu.2021.279

Abstract

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

CLC Number:

TM732

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