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交直流混合微电网分段协调控制策略
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新能源电力系统国家重点实验室华北电力大学

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国家重点研发计划


Segmented Coordination Control Strategy for Hybrid AC/DC Microgrid
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Electrical and Electronic Engineering College of North China Electric Power University,Beijing,China

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    摘要:

    为解决交直流混合微电网因微源出力变化、负荷变化和储能装置因荷电状态导致充放电功率发生变化等引起的功率波动问题,本文提出一种混合微电网分段协调控制策略。针对孤岛状态下的混合微电网,分析了混合微电网的典型拓扑和各运行模式下的功率关系。采用标幺化的方法得到了可表征混合微电网整体运行状态的特征量,根据该特征量的变化量对控制策略进行分段,对各段控制的工作原理进行了详细的分析,具体研究了在不同控制段中各变流器的相互协调;针对可能出现的网间交换功率振荡以及ILC运行模式频繁切换问题,对动作判据进行了补偿。最后,在PSCAD/EMTDC中建立仿真模型,仿真结果表明,在不同工况下各变流器均可迅速做出响应,保证系统的稳定运行。

    Abstract:

    In order to solve the power fluctuation caused by the change of micro-sources output, loads and power of energy storage devices in hybrid AC/DC microgrid, a segmented coordination control strategy for hybrid microgrid is proposed in this paper. Aiming at the hybrid microgrid in islanded state, the typical topology of the hybrid microgrid and the power relations under different operation modes are analyzed. The characteristic quantity which can represents the whole operation state of hybrid microgrid are obtained by standardization method. According to the variation of the characteristic quantity, the control strategy is divided into segments. Then the working principle of each section control is analyzed in detail and the coordinated control of the converters in different control segments are studied. Aiming at the possible power oscillation and frequent switching of ILC operation modes, the action criterion is compensated. Finally, a simulation model is established in PSCAD/EMTDC. The simulation results show that all converters can respond quickly under different operating conditions to ensure the stable operation of the system.

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引用本文

朱永强,张泉,刘康,等.交直流混合微电网分段协调控制策略[J/OL].电力系统自动化,http://doi.org/10.7500/AEPS20190227008.
ZHU Yongqiang,ZHANG Quan,LIU Kang,et al.Segmented Coordination Control Strategy for Hybrid AC/DC Microgrid[J/OL].Automation of Electric Power Systems,http://doi.org/10.7500/AEPS20190227008.

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历史
  • 收稿日期:2019-02-27
  • 最后修改日期:2019-09-02
  • 录用日期:2019-07-02
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