主动配电网中光-储单元功率协调控制策略
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1.国网河南电网平顶山供电公司 河南 平顶山;2.湖南大学电气与信息工程学院 湖南 长沙

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国网河南省电力公司科学技术项目(52176020000P)


Power Coordinated control strategy of PV-ESS units in active distribution network
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1.Pingdingshan Electric Power Company of State Grid Henan Electric Power Company Limited,Pingdingshan;2.Hunan University

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    摘要:

    为缓解光伏出力曲线与本地负荷曲线不一致所导致的潮流随机波动和电压越限问题,针对主动配电网中的光-储单元提出了一种分布式功率协调控制策略。该策略首先根据配网PCC处功率参考值与实际值的差值产生光-储单元负荷率变化量的参考值,然后利用牵制一致性算法,分别调节储能和逆变器的有功/无功负荷率,实现功率均分,并保证配网PCC处功率跟踪参考值。然后,引入平均一致性算法计算系统平均SOC,各储能单元结合自身SOC对有功参考值进行修正,实现不同储能单元间SOC的均衡控制。在Matlab/Simulink软件中搭建了包含分布式光-储单元的配电网仿真系统,仿真结果验证了所提方法的有效性。

    Abstract:

    A power coordinated control strategy of photovoltaic-energy storage system (PV-ESS) units is proposed to control the active distribution network (ADN) tracking scheduling commands and mitigating the power flow random fluctuations and voltage violations caused by the mismatch between PV and load curves. The strategy generates the references of the change in the PV-ESS units load rates based on the power difference between the reference value and the actual value at the distribution network PCC at first. Then a pining consensus algorithm is used to adjust the active/reactive load rates of ESS and inverter respectively to achieve power sharing proportional and ensure the reference value of power tracking at the PCC of ADN. In addition, an average consensus algorithm is introduced to calculate the average SOC of the ESSs, and each ESS corrects the power reference according to its own SOC to achieve the balanced control of SOC. Finally, a simulation ADN system containing four PV-ESS units is built in Matlab/Simulink software, and the simulation results verify the effectiveness of the proposed strategyr.

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  • 收稿日期:2020-11-12
  • 最后修改日期:2020-12-10
  • 录用日期:2021-01-11
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