Power grid load restoration strategy considering optimization of mobile emergency power sources under heavy rainstorm disasters

doi:10.11930/j.issn.1004-9649.202502050

Abstract

Abstract:

Utilizing various forms of mobile emergency power sources to flexibly dispatch electrical energy is an important technical approach to rapidly restore the important loads of power grids and enhance the resilience of urban distribution networks under rainstorm disasters. Therefore, a collaborative optimization strategy for rapid recovery of distribution networks after rainstorm disasters based on mobile emergency power sources is proposed. Firstly, a spatio-temporally coupled mobile behavior model for mobile emergency power sources is developed, and linear constraints characterizing the movement of mobile emergency power sources in post-disaster power grids are constructed. Then, relevant constraints characterizing the output operation of mobile emergency power sources are constructed to address the two main categories—mobile energy storage and mobile generators—while accounting for the charging and discharging behaviors of mobile energy storage systems. Meanwhile, by integrating with constraints characterizing power grid operations, an objective function is constructed based on the principle of maximizing restored load energy while considering dispatch costs, and a mixed-integer second-order cone optimization model for post-disaster grid load restoration is established, which incorporates the collaborative optimization of mobile emergency power sources. Finally, by setting up different case scenarios, this study analyzes the dispatch of mobile emergency power sources and the load recovery results after rainstorm disasters, verifying the accuracy and effectiveness of the proposed model.

Key words: post-disaster power grid, load restoration, mobile energy storage, mobile generator, second-order cone optimization

YANG Tingtian, LIN Xingxin, ZENG Kehan, ZHANG Caibin. Power grid load restoration strategy considering optimization of mobile emergency power sources under heavy rainstorm disasters[J]. Electric Power, 2026, 59(2): 90-103.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202502050

https://www.electricpower.com.cn/EN/Y2026/V59/I2/90

Figures/Tables 23

Fig.1 The trend of heavy rain days at national-level meteorological stations in China from 2012 to 2022

Fig.2 The trend of heavy rainstorms and torrential rain days at national-level meteorological stations in China from 2012 to 2022

Fig.3 Operational framework for load restoration of post-disaster power grid with coordinated optimization of mobile power sources

Fig.4 37-node power grid

Table 1 Post-disaster power grid disconnection status

序号	首节点	末节点	修复时段/s
1	702	705	t=8
2	702	703	t=10
3	713	704	t=12
4	709	708	t=16
5	734	710	t=18
6	737	738	t=20

Fig.5 Post-disaster power grid and mobile emergency power access point

Table 2 Post disaster islanding load demand of power grid

孤岛	负荷/kW
1（742）	178
2（704）	422
3（709）	453
4（734）	309
5（735）	127
6（741）	253

Fig.6 Operation status of mobile emergency power supply in plan 1

Fig.7 Operation status of mobile emergency power supply in plan 1

Fig.8 Output of mobile emergency power supply in plan 1

Fig.9 Operation status of mobile energy storage 1 in plan 2

Fig.10 Operation status of mobile energy storage 2 in plan 2

Fig.11 Operation status of mobile emergency power supply in plan 2

Fig.12 Output status of mobile emergency power supply in plan 2

Fig.13 Operation status of mobile emergency power supply in plan 3

Fig.14 Operation status of mobile emergency power supply in plan 3

Fig.15 Output status of mobile emergency power supply in plan 3

Table 3 The total operating cost and total load recovery of three plans

方案	负荷恢复/kW	运行成本/元
1	10294	7736.96
2	5214	2339.38
3	8076	5299.58

Fig.16 Percentage of load powered by mobile emergency power supply to total load demand in different time periods

Table 4 Power supply grade of different islanded systems

孤岛	权重	等级
1	2	二级
2	3	一级
3	3	一级
4	1	三级
5	1	三级
6	2	二级

Fig.17 Operation decision-making of mobile emergency power supply considering power supply priority

Fig.18 Operation decision-making of mobile emergency power supply added with an operational penalty factor

Fig.19 Power operation decision-making under different fault repair time scenarios

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