A multi-objective planning method for distribution networks, which considers demand response and network reconfiguration, was proposed to address the issues of decreased voltage stability, increased network losses, and increased wind and solar power curtailment resulting from large-scale renewable energy integration. First, the structure and operational principles of replacing the original tie-line switches with soft open points (SOP) in the distribution network were analyzed and modeled. Second, a multi-objective mathematical model was established, aiming to maximize voltage stability, minimize planning costs, and reduce operational losses. Then, an improved arithmetic optimization algorithm was introduced to solve the multi-objective model, which was characterized by fast solving speed and high accuracy. Finally, simulations were conducted on the IEEE 33-node distribution system. The results demonstrate that the proposed approach enhances voltage stability while reducing network losses and renewable energy curtailment. Comparative analysis with other algorithms confirms the superior performance of the proposed method. In summary, the multi-objective planning method for distribution networks proposed, which takes into account demand response and network restructuring, can effectively address the operational challenges posed by the large-scale integration of renewable energy into distribution networks, thereby providing a viable planning solution for the safe, economical, and efficient operation of distribution networks.
MI Yang, LIU Xiao-jian, LI Chun-xu.
Multi-objective Reconstruction Planning of Distribution Networks Considering Intelligent Soft Switches and Demand Response[J].
Science Technology and Engineering, 2026, 26(23): 9973-9983 DOI:10.12404/j.issn.1671-1815.2506495
智能软开关(soft open point, SOP)是一种新型电力电子开关,作为柔性互联的枢纽,能够代替传统的联络线,实现馈线间功率的连续可控传输,可以同时解决电压越限、网损增加以及弃风弃光问题。为了解决电压越限和网络阻塞等问题,文献[14]提出了一种运用支路灵敏度技术的智能软开关分布与容量配置方法;为了解决高渗透率新能源下的配电网安全运行问题,文献[15]提出了一种计及灵活性不足的配电网智能软开关与多类型共享储能协调优化运行方法;为了解决高比例分布式电源接入引发的波动性与不确定性,文献[16]提出一种基于智能储能软开关优化的配电网两阶段动态重构策略;针对新能源接入后电压质量下降和网损增大等问题,文献[17]提出一种储能系统与智能软开关协同优化运行的方法,提高了配电网的可靠性与运行效率。但上述文献均聚焦于SOP在配电网中的应用,既未充分体现SOP在网络重构方面的优势,也未能从时间与空间两个维度对配电网进行优化。因此,将需求响应与智能软开关相结合,为解决这一问题提供了可行方案。
$\left\{\begin{array}{l}E_{\mathrm{e}, i, t+\Delta t}^{\mathrm{ESS}}=E_{\mathrm{e}, i, t}^{\mathrm{ESS}}+\eta_{\mathrm{ch}} \Delta t P_{\mathrm{e}, i, t}^{\mathrm{ch}}-\frac{1}{\eta_{\mathrm{dis}}} \Delta t P_{\mathrm{e}, i, t}^{\mathrm{dis}} \\E_{\mathrm{e}, i}^{\min } \leqslant E_{\mathrm{e}, i, t}^{\mathrm{ESS}} \leqslant E_{\mathrm{e}, i}^{\max }\end{array}\right.$
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