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1.新能源电力系统国家重点实验室(华北电力大学),北京市 102206
2.智能电网教育部重点实验室(天津大学),天津市 300072
3.中国电力科学研究院有限公司,北京市 100192
4.国网天津市电力公司,天津市 300010
Received:27 March 2022,
Revised:2022-06-18,
Published Online:16 February 2023,
Published:25 March 2023
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董雷,吴怡,张涛等.基于强化学习的含智能软开关主动配电网双层优化方法[J].电力系统自动化,2023,47(6):59-68.
DONG Lei,WU Yi,ZHANG Tao,et al.Reinforcement Learning Based Double-layer Optimization Method for Active Distribution Network with Soft Open Point[J].Automation of Electric Power Systems,2023,47(6):59-68.
董雷,吴怡,张涛等.基于强化学习的含智能软开关主动配电网双层优化方法[J].电力系统自动化,2023,47(6):59-68. DOI: 10.7500/AEPS20220327004.
DONG Lei,WU Yi,ZHANG Tao,et al.Reinforcement Learning Based Double-layer Optimization Method for Active Distribution Network with Soft Open Point[J].Automation of Electric Power Systems,2023,47(6):59-68. DOI: 10.7500/AEPS20220327004.
由于大量分布式电源接入配电网,配电网调控能力不足导致电压波动大、可再生能源消纳水平低以及经济性指标差等问题突出。为此,提出了一种智能软开关(SOP)与配电网动态重构协同优化方法,充分调动网侧灵活性资源,并构建基于强化学习的双层优化模型。模型上层将生成的辐射型拓扑结构集合作为强化学习的动作空间,动态选择拓扑结构;下层基于上层的网络结构进行含SOP可控有源设备运行优化,挖掘SOP灵活的潮流调控能力
并依据优化结果不断修正上层拓扑选择,可高效求解此多时间尺度混合整数非线性规划问题。通过删减无效网络、对历史信息计及优先级采样等措施,加速了算法收敛速度。算例分析表明,基于强化学习的双层协同优化方法给出的优化策略有效改善了主动配电网运行水平
并且能够自适应源荷不确定性场景。
Due to the integration of a large number of distributed genreators to the distribution network
the insufficient regulation and control capacity of the distribution network has led to serious problems such as large voltage fluctuations
low consumption level of renewable energy
and poor economic indicators. Therefore
a collaborative optimization method of soft open point (SOP) and dynamic reconfiguration of the distribution network is proposed to fully mobilize the flexibility resources on the network side
and a double-layer optimization model based on reinforcement learning is constructed. In the upper layer of the model
the generated radial topological structure set is used as the action space of reinforcement learning
and the topological structure is dynamically selected. The lower layer optimizes the operation of controllable active equipment with SOP based on the network structure of the upper layer
excavates the flexible power flow regulation ability of SOP
and continuously modifies the topology selection of the upper layer according to the optimization results
which can effectively solve the multi-time-scale mixed-integer nonlinear programming problem. The convergence speed of the algorithm is accelerated by deleting invalid networks and taking priority sampling of historical information. The example analysis shows that the optimization strategy given by the double-layer collaborative optimization method based on reinforcement learning effectively improves the operation level of the active distribution network
and can adapt to the source-load uncertainty scenarios.
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