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西安交通大学电气工程学院,陕西省西安市710049
Received:22 April 2025,
Revised:2025-07-13,
Online First:05 August 2025,
Published:25 January 2026
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李嘉兴,刘梦奇,张耀等.基于半正定规划的配电网三相不平衡日前最优换相策略[J].电力系统自动化,2026,50(2):125-135.
LI Jiaxing,LIU Mengqi,ZHANG Yao,et al.Optimal Day-ahead Commutation Strategy for Three-phase Unbalanced Distribution Network Based on Semidefinite Programming[J].Automation of Electric Power Systems,2026,50(2):125-135.
李嘉兴,刘梦奇,张耀等.基于半正定规划的配电网三相不平衡日前最优换相策略[J].电力系统自动化,2026,50(2):125-135. DOI: 10.7500/AEPS20250422009.
LI Jiaxing,LIU Mengqi,ZHANG Yao,et al.Optimal Day-ahead Commutation Strategy for Three-phase Unbalanced Distribution Network Based on Semidefinite Programming[J].Automation of Electric Power Systems,2026,50(2):125-135. DOI: 10.7500/AEPS20250422009.
随着分布式电源、电动汽车等不平衡设备的广泛普及,配电网运行出现了网络损耗增加、三相不平衡度加大等一系列问题。为了降低含有混合相的配电网的电压不平衡度,提出了面向三相不平衡治理的配电负荷日前最优换相模型。首先,建立了以电压不平衡度最小为目标,包含系统换相时间、配电网三相潮流和系统安全运行等约束的混合整数半正定优化模型;其次,将离散变量转化为等式二次约束形式,得到三相不平衡配电网日前最优换相模型;然后,通过高斯随机选代法恢复秩一约束,求解得到最优负荷换相策略;最后,采用IEEE标准算例,将所提方法与三相潮流线性化进行对比,验证了所提模型与求解方法的准确性和有效性。
With the widespread popularization of unbalanced equipment such as distributed generator and electric vehicle
a series of problems such as increased network loss and three-phase imbalance degree appear in the operation of distribution network. In order to reduce the voltage imbalance degree of distribution network with mixed phases
an optimal day-ahead commutation model of distribution load for three-phase imbalance mitigation is proposed. Firstly
a mixed-integer semidefinite optimization model is established with the objective of minimizing the voltage imbalance degree
incorporating constraints such as system commutation time
three-phase power flow in distribution networks
and system security operation. Secondly
discrete variables are transformed into equation-based quadratic constraints
yielding an optimal day-ahead commutation model for three-phase unbalanced distribution networks. Then
a Gaussian randomized iterative method is employed to recover the rank-one constraint
enabling the solution of an optimal load commutation strategy. Finally
by using standard IEEE test cases
the proposed method is compared against the three-phase power flow linearization
validating the correctness and effectiveness of both the model and the solution approach.
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