Optimal Capacity Configuration Method for Multi-Microgrid System Utilizing Wind-Solar-Electric-Hydrogen Hybrid Energy Storage

doi:10.12096/j.2096-4528.pgt.24175

Abstract

Abstract:

Objectives In order to study the problems of increasing complexity of power balance, and increasing uncertainty of power flow distribution and increasing security and stability requirements of power grid caused by high proportion of renewable energy access, a capacity optimization configuration method of multi-microgrid system including wind power, photovoltaic, battery and hydrogen energy storage is proposed. Methods A bi-level optimization model is established under the framework of multi-microgrid distribution network. The outer objective of the model is to minimize the life cycle cost, and the inner objective is to minimize the peak-valley difference, network loss and voltage offset of the distribution network. Based on the IEEE 69-bus system, the white shark optimizer (WSO) algorithm and Cplex solver were used to solve the model, and the optimal capacity configuration scheme and planning operation results are obtained. Finally, case analysis is carried out through different energy storage combinations. Results When the capacity configuration of each component of the system is optimal, the installed ratio of the wind-solar power generation system to the hybrid energy storage system is 1∶0.27. The wind-solar-electric-hydrogen hybrid energy storage system is superior to the wind-solar-single energy storage system in terms of economy and stability. Conclusions The proposed method can not only optimize the joint optimal cost of the system, but also effectively reduce the load peak-valley difference, distribution network loss and improve the power quality.

Key words: wind power, photovoltaic, hydrogen energy, energy storage, multi-energy complementary, capacity configuration, power distribution, bi-level optimization model, multi-microgrid

CLC Number:

TK 02

Zhong LIU, Yanming HUANG, Guangming ZHU, Shuyun ZOU. Optimal Capacity Configuration Method for Multi-Microgrid System Utilizing Wind-Solar-Electric-Hydrogen Hybrid Energy Storage[J]. Power Generation Technology, 2025, 46(2): 240-251.

Figures/Tables 16

References 21

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主体	单机容量	投资成本/万元	运维成本/(万元/a)	置换成本/万元	寿命/a
风电机组	100 kW	10	0.890		25
光伏阵列	1 kW	0.32	0.003		25
蓄电池	2 kW∙h	0.50	0.002	0.4	5
电解槽	5 kW	6	0.040	4.5	15
储氢罐	1 kW∙h	0.18			25
燃料电池	5 kW	8.75	0.440	6.0	10

主体	单机容量	投资成本/万元	运维成本/(万元/a)	置换成本/万元	寿命/a
风电机组	100 kW	10	0.890		25
光伏阵列	1 kW	0.32	0.003		25
蓄电池	2 kW∙h	0.50	0.002	0.4	5
电解槽	5 kW	6	0.040	4.5	15
储氢罐	1 kW∙h	0.18			25
燃料电池	5 kW	8.75	0.440	6.0	10

微电网	N_w/台	N_pv/片	N_ele/台	N_bat/块	E_tank/(kW⋅h)	P_fc/kW
MG_A	7	551	23	434	978	102.7
MG_B	9	630	37	433	1 168	146.7
MG_C	13	920	40	389	700	74.8

微电网	N_w/台	N_pv/片	N_ele/台	N_bat/块	E_tank/(kW⋅h)	P_fc/kW
MG_A	7	551	23	434	978	102.7
MG_B	9	630	37	433	1 168	146.7
MG_C	13	920	40	389	700	74.8

电网	发电系统装机容量/kW	电氢混合储能功率/kW	比例
MG_A	1 163.2	444.3	1∶0.38
MG_B	1 505.3	508.1	1∶0.34
MG_C	2 160.6	369.4	1∶0.17
配电网	4 829.1	1 321.5	1∶0.27