计及系统可靠性约束的配电网储能优化配置

doi:10.19799/j.cnki.2095-4239.2024.0541

摘要/Abstract

摘要：

针对配电网储能选址定容过程中系统可靠性提升需求难以实现同步快速量化分析的问题，本工作提出了计及系统可靠性约束的配电网储能优化配置模型与求解方法。首先选取系统电力不足期望指标量化考察储能配置对系统可靠性的提升作用，建立了兼顾经济性与可靠性目标的配电网储能优化配置双层规划模型，上层以配电网配置储能的净投资成本最小为优化目标，下层以配电系统N-1故障下负荷削减量最小为优化目标；其次基于内点法求解优化问题过程中的KKT条件及复合函数求导法则，推导出系统可靠性指标对储能出力上限及容量灵敏度分析解析表达式，并将其代入到线性化后的系统可靠性不等式约束中，实现上下层模型间的参数传递；最后以改进的IEEE RTS-79测试系统算例为例，验证了所设计的双层规划模型与所推导的灵敏度分析解析表达式的有效性与合理性。

关键词: 配电网, 储能配置, 系统可靠性, 灵敏度分析

Abstract:

To address the challenge of synchronously and rapidly quantifying the increase in system reliability during the site selection and sizing process of energy storage in distribution networks, this study proposes an optimization configuration model and solution approach that integrates system reliability constraints. First, the proposed model evaluates the impact of energy storage configuration on system reliability using the expected power shortage index as a metric. This study develops a dual-layer planning model for energy storage optimization in distribution networks, considering economic and reliability objectives. The upper layer focuses on minimizing the net investment cost of energy storage, whereas the lower layer aims to minimize load reduction under N-1 fault conditions in the distribution system. Second, based on the KKT condition and composite function differentiation rule in the process of solving optimization problems using the interior point approach, analytical expressions for the sensitivity analysis of the system reliability index to the upper limit of energy storage output and capacity are derived. These expressions were integrated into the linearized system reliability inequality constraints, facilitating parameter transfer between the upper and lower layers of the model. Finally, the effectiveness and rationality of the proposed dual-layer planning model and the derived sensitivity analysis expressions are validated using the improved IEEE RTS-79 test system.

Key words: distribution network, energy storage configuration, system reliability, sensitivity verification

中图分类号:

TM 715

李渊, 郑舒, 陈永华, 王俊, 王子辉. 计及系统可靠性约束的配电网储能优化配置[J]. 储能科学与技术, 2025, 14(1): 193-202.

Yuan LI, Shu ZHENG, Yonghua CHEN, Jun WANG, Zihui WANG. Optimization configuration of distribution network energy storage considering system reliability constraints[J]. Energy Storage Science and Technology, 2025, 14(1): 193-202.

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参数	取值
C_S	240×10³ USD/MWh
C_P	120×10³ USD/MW
L_P	1.5×10³ USD/MWh
d	0.03
T	20年

项目	∂E_EDNS/∂P_E^max	∂E_EDNS/∂S_E
#1储能	-0.03718	0
#2储能	-0.03707	0
#3储能	-0.03532	0

项目	场景1	场景2	场景3	场景4
E_EDNS/p.u.	0.0972	0.094	0.09	0.088
P_E1,max/p.u.		0.1024	0.12	0.12
P_E2,max/p.u.		0	0	0.0482
P_E3,max/p.u.		0.0376	0.114	0.12
S_E1/p.u.		0.1536	0.18	0.18
S_E2/p.u.		0	0	0.0723
S_E3/p.u.		0.0564	0.171	0.18
成本/10⁴USD		213.75	667.02	897.15

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