Economic Optimal Scheduling of Microgrid Considering Elastic Recovery

doi:10.16182/j.issn1004731x.joss.23-1381

Abstract

Abstract:

To enhance the ability of microgrids (MGs) to withstand extreme disaster events, this paper proposes a multi-objective scheduling model considering resilience restoration and economic performance, based on the traditional concepts of power system resilience and reliability. Resilience is specifically quantified. The model integrates energy storage into the objective function and includes reliability indicators as constraints, building on traditional microgrid economic dispatch. The optimization problem is solved using an improved white shark optimizer (WSO) and multi-objective fuzzy programming, where different weights are assigned to each objective function, and the optimal weights are determined through case studies. A microgrid scheduling scheme with both economic performance and resilience is obtained. Simulation results demonstrate that this method can allocate appropriate weight coefficients according to various grid responsibilities, achieving a grid system with both resilience and economic performance.

Key words: microgrid, elastic, reliability, fuzzy programming, white shark optimizer

CLC Number:

TP319.9

Chen Jianghong, Shi Kanghao, Hu Jiahui, Zhao Xiaohan. Economic Optimal Scheduling of Microgrid Considering Elastic Recovery[J]. Journal of System Simulation, 2025, 37(3): 623-634.

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电源种类	额定功率/kW	燃料成本/ (元∙kg^-1)	低位热值/ (kJ∙g^-1)
PV	150	0	0
WT	250	0	0
MT	120	5.140	51.257
FC	120	2.430	22.687
DE	150	7.050	42.552
BT	60	0	0

电源种类	维护系数	运行效率
PV	0.019	75
WT	0.031	87
MT	0.012	40
FC	0.017	51
DE	0.007	36
BT	0.005	η_c =82, η_d=93

污染物	治理成本/ (元·g^-1)	污染物排放量/g∙(kW·h)^-1
污染物	治理成本/ (元·g^-1)	MT	FC	DE
CO	0.011	0.048	0.001	0.050
NO	0.063	0.200	0.015	1.200
SO₂	0.027	0.013	0.002	1.600

时间段	购电价格/ (元/kW∙h)	售电价格/ (元/kW∙h)
01:00—09:00	0.216	0.155
10:00—13:00	0.793	0.485
14:00—18:00	0.505	0.315
19:00—00:00	0.793	0.485

参数	数值	参数	数值
种群个数	100	加速度系数	4.11
迭代次数	1 000	波浪最小频率	0.07
初始速度	0.5	波浪最大频率	0.75
最终速度	1.5