Optimal Decision-making Configuration Method for Battery Energy Storage Station to Replace Substation Upgrades

doi:10.12204/j.issn.1000-7229.2023.07.005

Abstract

Abstract:

With the introduction of large-scale energy sources and increasing load growth, some substations may face capacity limitations. To ensure the operational economy of power companies, this study undertakes a comparative analysis of two schemes for configuring energy storage power stations and upgrading and expanding substations. First, we considered the economic, reliability, and environmental indicators of the scheme to establish a comprehensive evaluation index system. Second, to maximize the allocation of energy storage benefits as the planning goal, we consider the life cycle cost of the energy storage system and the benefits of improving power grid operation reliability, delaying the upgrading of the power grid, and reducing operating network loss in the distribution network to establish an energy storage cost-benefit model. Subsequently, an improved evolutionary algorithm was utilized in simulations to ascertain the allocation capacity of the energy storage system. The optimal planning scheme was then obtained through the evaluation system. The results show that, under the current grid operation level and mode, the configuration of the energy storage system can delay grid upgrading, improve the overall operation level of the grid, and provide a planning reference for the subsequent large-scale new energy grid connection application of the energy storage system to smooth the new energy output and delay grid upgrading.

Key words: distribution network planning, energy storage system, substation expansion, reliability, capacity configuration

CLC Number:

TM91

ZHANG Zhongdan, PI Xia, YANG Dezhou, Lü Jinli. Optimal Decision-making Configuration Method for Battery Energy Storage Station to Replace Substation Upgrades[J]. ELECTRIC POWER CONSTRUCTION, 2023, 44(7): 41-49.

Figures/Tables 9

Fig.1 Energy storage capacity allocation process

Fig.2 Grid topology

Table 1 Energy storage system parameters

Table 2 Line structure parameters

Table 3 Component reliability parameters

Table 4 Other parameters

Table 5

Fig.3 Comprehensive benefits under different storage capacity

Table 6 Comparison indicator

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