张剑, 崔明建, 何怡刚. 部分分布式电源提供辅助服务的主动配电网快速鲁棒优化[J]. 高电压技术, 2024, 50(5): 2107-2116. DOI: 10.13336/j.1003-6520.hve.20220805
引用本文: 张剑, 崔明建, 何怡刚. 部分分布式电源提供辅助服务的主动配电网快速鲁棒优化[J]. 高电压技术, 2024, 50(5): 2107-2116. DOI: 10.13336/j.1003-6520.hve.20220805
ZHANG Jian, CUI Mingjian, HE Yigang. Fast Robust Optimization in Active Distribution Network for Partial Distributed Generators Providing Ancillary Services[J]. High Voltage Engineering, 2024, 50(5): 2107-2116. DOI: 10.13336/j.1003-6520.hve.20220805
Citation: ZHANG Jian, CUI Mingjian, HE Yigang. Fast Robust Optimization in Active Distribution Network for Partial Distributed Generators Providing Ancillary Services[J]. High Voltage Engineering, 2024, 50(5): 2107-2116. DOI: 10.13336/j.1003-6520.hve.20220805

部分分布式电源提供辅助服务的主动配电网快速鲁棒优化

Fast Robust Optimization in Active Distribution Network for Partial Distributed Generators Providing Ancillary Services

  • 摘要: 经逆变器接入配电网的分布式电源提供有功与无功辅助服务是确保配电网安全经济运行的重要手段。该文同时计及了储能系统、可投切电容电抗器、有载调压变压器分接头、静止无功补偿器调节能力,以储能与网络损耗及弃风弃光最小为目标函数,计及运行约束,基于支路潮流方程构建了部分分布式电源提供辅助服务的多时段二阶段混合整数二阶锥鲁棒优化模型,提出了一种新颖的基于割平面的主、次问题二阶段直接交替迭代求解方法。不同于现有列与约束生成(columns and constraints generation,CCG)算法,该方法求解主问题时无需增加新的变量与约束条件,求解次问题时,只需针对每个时段进行求解,因此极大降低了求解复杂度与计算机内存。若求解结果不满足二阶锥精确凸松弛条件,则构建二阶段混合整数序列二阶锥鲁棒优化模型,依然能够快速求解,且可恢复出原问题的精确解。最后,采用2个仿真实例验证了所提出方法的性能。IEEE 123节点配电网的仿真结果表明,该方法计算速度是CCG算法的12~22倍。该方法可为含高比例间歇性分布式电源配电网鲁棒优化运行提供实时快速分析与求解工具,提高新能源就地消纳能力。

     

    Abstract: Distributed generators (DGs) interfaced with inverters providing auxiliary service is of high value in terms of guaranteeing safe and economic operation of distribution system. In this paper, simultaneously considering the capabilities of energy storage systems, switchable capacitor reactors, on-load transformer changers, static Var compensators, and operation constraints, we developed a multi-period two-stage hybrid integer second-order conic programming (SOCP) robust model with partial DGs providing auxiliary service to minimize active power losses of ESSs and distribution network as well as abandoned wind and solar power based on branch flow equations. Meanwhile, we proposed a novel method of directly iteratively two-stage solving between master and sub-problems based on cutting plane. In comparison to columns and constraints generation algorithm (CCG), the numbers of variables and constraints in the first stage model remain constant during iteration to enhance the computing efficiency. To solve the second-stage multi-period model, only the model of each single period needs to be solved. To this end, the solving complexity and computer memory are greatly reduced. If the conic relaxation is not exact, a two-stage mixed integer sequential SOCP is formulated using convex-concave procedure and cuts, which can be quickly solved still. Moreover, the global optimal solution of the original problem can be recovered. The capabilities of the proposed method are validated with two simulation cases. The simulation results of IEEE 123-bus distribution network show that the computational rate of the proposed method is 12 to 22 times that of CCG algorithm. The proposed method provides a real-time and fast analyzing and solving tool for the optimal robust operation of distribution networks with high proportion of intermittent DGs, and improves the accommodating capabilities of renewable energy.

     

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