张博, 马梓耀, 王辰, 张璐, 唐巍. 含光储充一体化电站的城市交直流混合配电网韧性提升策略[J]. 电力系统自动化, 2023, 47(12): 28-37.
引用本文: 张博, 马梓耀, 王辰, 张璐, 唐巍. 含光储充一体化电站的城市交直流混合配电网韧性提升策略[J]. 电力系统自动化, 2023, 47(12): 28-37.
ZHANG Bo, MA Ziyao, WANG Chen, ZHANG Lu, TANG Wei. Resilience Improvement Strategy for Urban AC/DC Hybrid Distribution Network with Photovoltaic-Storage-Charging Integrated Station[J]. Automation of Electric Power Systems, 2023, 47(12): 28-37.
Citation: ZHANG Bo, MA Ziyao, WANG Chen, ZHANG Lu, TANG Wei. Resilience Improvement Strategy for Urban AC/DC Hybrid Distribution Network with Photovoltaic-Storage-Charging Integrated Station[J]. Automation of Electric Power Systems, 2023, 47(12): 28-37.

含光储充一体化电站的城市交直流混合配电网韧性提升策略

Resilience Improvement Strategy for Urban AC/DC Hybrid Distribution Network with Photovoltaic-Storage-Charging Integrated Station

  • 摘要: 近年来,频发的极端事件给配电网带来了巨大损失,因此配电网韧性提升极为重要。随着分布式光伏、储能及电动汽车等直流源荷的大量增加,城市配电网的形态正在从交流向交直流混合配电网转变。直流线路具有互联灵活的优势,能够打破交流配电网辐射状运行瓶颈实现灾后灵活组网,可有效提升配电网韧性。针对含光储充一体化电站的城市交直流混合配电网,提出一种能够充分考虑柔性直流互联特性与调控能力的供电恢复策略。首先,考虑灾后关键负荷与就地资源分布,提出了以直流线路为核心的应急供电恢复拓扑生成方法;其次,基于交直流恢复拓扑,建立了一种配电网两阶段韧性提升优化模型,第1阶段以最大程度保障重要负荷供电为目标优化负荷恢复次序,第2阶段以网络损耗最小为目标优化光储充一体化电站应急电源功率。算例结果表明,所提策略能够充分利用直流灵活互联能力及光储充一体化电站功率支撑能力恢复关键负荷,两阶段故障恢复方法具有良好的可行性与适应性。

     

    Abstract: In recent years, frequent extreme disasters have caused huge losses to the distribution network, so it is extremely important to improve the resilience of the distribution network. With the large increase of DC sources and loads such as distributed photovoltaic, energy storage and electric vehicles, the form of urban distribution network is transforming from AC distribution network to AC/DC hybrid distribution network. DC lines have the advantage of flexible interconnection, which can break the bottleneck in the radial operation of AC distribution networks and achieve flexible networking after disasters, thus effectively improving the resilience of distribution networks. Aiming at the urban AC/DC hybrid distribution network with photovoltaicstorage-charging integrated station(PSCIS), a power supply recovery strategy that fully considers the characteristics of flexible DC interconnection and regulation ability is proposed. First, considering the distribution of critical loads and local resources after disasters, a topology generation method for emergency power supply recovery with DC lines as the core is proposed. Secondly,based on the AC/DC recovery topology, a two-stage resilience improvement optimization model for the distribution network is established. In the first stage, the load recovery sequence is optimized with the objective of maximizing the power supply of critical loads. In the second stage, the emergency power supply output of the PSCIS is optimized with the objective of minimizing the network loss. The simulation results show that the proposed strategy can make full use of the DC flexible interconnection capability and power support capability of PSCIS to restore critical loads, and the two-stage fault recovery method has good feasibility and adaptability.

     

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