A Comprehensive Control Strategy for F-SOP Considering Three-Phase Imbalance and Economic Operation in ISLDN

IF 8.6 1区 工程技术 Q1 ENERGY & FUELS IEEE Transactions on Sustainable Energy Pub Date : 2024-08-16 DOI:10.1109/TSTE.2024.3444794
Xin Wang;Qi Guo;Chunming Tu;Liang Che;Zhong Xu;Fan Xiao;Tianlin Li;Leiqi Chen
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Abstract

With the increasing integration of renewable energy sources (RES) and single-phase loads, three-phase imbalance and transformer lightly/heavily loaded operation issues has become more prominent in low-voltage distribution networks (LDN). However, existing research on interconnected systems of LDN (ISLDN) rarely addresses the comprehensive management of both three-phase imbalance and lightly/heavily loaded operation issues. To this end, a comprehensive control strategy for three-phase imbalance and lightly/heavily loaded operation in ISLDN based on a four-leg soft open point (F-SOP) is proposed in this paper. Firstly, the comprehensive loss characteristics model of ISLDN including the F-SOP and the transformer are established, revealing that both imbalance and load rate can affect the equipment efficiency. Secondly, considering the objective of minimizing power loss, an optimization dispatch strategy with constraints of three-phase imbalance and the optimal economic operation area is proposed to obtain the dispatch power commands for the F-SOP. Furthermore, an improved peer-to-peer control for F-SOP is proposed to ensure the conduct of the optimization dispatch strategy and enhance stability performance of system. Finally, the effectiveness and feasibility of the proposed comprehensive control strategy are validated by the simulations and experiments. The results show that comprehensive control of lightly/heavily loaded operation and three-phase imbalance in the ISLDN can significantly reduce daily power loss by 62%, improving system operation reliability and economy.
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考虑 ISLDN 中三相不平衡和经济运行的 F-SOP 综合控制策略
随着可再生能源与单相负荷一体化程度的提高,低压配电网中三相不平衡和变压器轻、重负荷运行问题日益突出。然而,现有的LDN互连系统(ISLDN)研究很少涉及三相不平衡和轻/重负载运行问题的综合管理。为此,本文提出了一种基于四支路软开点(F-SOP)的ISLDN三相不平衡和轻/重负载综合控制策略。首先,建立了包括F-SOP和变压器在内的ISLDN的综合损耗特性模型,揭示了不平衡和负荷率都会影响设备效率。其次,以电力损耗最小为目标,提出了三相不平衡约束和最优经济运行区域约束下的优化调度策略,得到了F-SOP的电力调度指令;在此基础上,提出了一种改进的F-SOP点对点控制方法,保证了优化调度策略的实施,提高了系统的稳定性。最后,通过仿真和实验验证了所提综合控制策略的有效性和可行性。结果表明,综合控制ISLDN轻、重负荷运行和三相不平衡,可使ISLDN日功率损耗显著降低62%,提高系统运行可靠性和经济性。
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来源期刊
IEEE Transactions on Sustainable Energy
IEEE Transactions on Sustainable Energy ENERGY & FUELS-ENGINEERING, ELECTRICAL & ELECTRONIC
CiteScore
21.40
自引率
5.70%
发文量
215
审稿时长
5 months
期刊介绍: The IEEE Transactions on Sustainable Energy serves as a pivotal platform for sharing groundbreaking research findings on sustainable energy systems, with a focus on their seamless integration into power transmission and/or distribution grids. The journal showcases original research spanning the design, implementation, grid-integration, and control of sustainable energy technologies and systems. Additionally, the Transactions warmly welcomes manuscripts addressing the design, implementation, and evaluation of power systems influenced by sustainable energy systems and devices.
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