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基于电压与功率前馈的电能路由器储能端口优化控制策略
作者:
作者单位:

合肥工业大学电气与自动化工程学院,安徽省合肥市 230009

作者简介:

通讯作者:

基金项目:

国家重点研发计划资助项目(2018YFB1500700)。


Optimal Control Strategy for Energy Storage Port of Electric Energy Router Based on Voltage and Power Feedforward
Author:
Affiliation:

School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China

Fund Project:

This work is supported by National Key R&D Program of China (No. 2018YFB1500700).

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    摘要:

    针对采用双向Buck/Boost拓扑作为电能路由器储能端口时存在的储能端口并网启动电流冲击和离网母线电压波动的问题,提出了一种储能端口电压前馈与负载功率前馈相结合的电能路由器储能端口并离网优化控制策略。该方法通过前馈储能侧电压抑制储能端口的并网启动冲击电流,消除离网下储能侧电压波动对母线电压的影响,同时利用基于以太网控制自动化技术(EtherCAT)的电能路由器快速控制通信单元前馈负载功率,抑制离网下负载突变产生的母线电压扰动,节省电流采样成本。理论分析与实验结果验证了所提优化控制策略的有效性。

    Abstract:

    When the bi-directional Buck/Boost topology is used as energy storage ports of electric energy routers, the energy storage port exists grid-connection startup inrush current and the bus voltage has fluctuation in the off-grid mode. Aiming at the problem, an optimal grid-connection/off-grid control strategy is proposed for energy storage port, which combines voltage feedforward of energy storage port and load power feedforward control. The feedforward of voltage on the energy storage side can effectively restrain the inrush current of energy storage port during grid-connection startup process, and eliminate the impact of voltage fluctuation of energy storage side on bus voltage. The communication unit is fast controlled by electric energy router based on Ethernet control automation technology (EtherCAT) to feeds forward the load power, which can restrain bus voltage fluctuation caused by load disturbance in the off-grid mode and reduce the cost of current sampling. The theoretical analysis and experimental results show that the proposed method can effectively improve the performance of electric energy router.

    图1 电能路由器基本框架Fig.1 Basic structure of electric energy router
    图2 双向Buck/Boost变换器Fig.2 Bi-directional Buck/Boost converter
    图3 储能端口双环控制框图Fig.3 Block diagram of dual-loop control of energy storage port
    图4 储能端口优化控制策略框图Fig.4 Block diagram of optimal control strategy for energy storage port
    图5 并网启动实验波形Fig.5 Experimental waveforms of grid-connection startup
    图6 负载扰动实验波形Fig.6 Experimental waveforms of load disturbance
    图7 VBat扰动实验波形Fig.7 Experimental waveforms of VBat disturbance
    图 双向Buck/Boost等效框图Fig. Block diagram of bi-directional Buck/Boost
    图 电能路由器控制通信单元Fig. Communication control unit of electric energy router
    图 电能路由器控制系统结构图Fig. Structure diagram of electric energy router control system
    图 输出阻抗随K变化而变换的波特图Fig. Bode diagram of output impedance changing with K
    图 输出阻抗随kpv变化而变换的波特图Fig. Bode diagram of output impedance changing with kpv
    图 输出阻抗随VBat变化而变换的波特图Fig. Bode diagram of output impedance changing with VBat
    图 实验硬件图Fig. The photo of experimental hardware prototype
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引用本文

赵文广,张兴,李彦君,等.基于电压与功率前馈的电能路由器储能端口优化控制策略[J/OL].电力系统自动化,http://doi.org/10.7500/AEPS20190801002.
ZHAO Wenguang,ZHANG Xing,LI Yanjun,et al.Optimal Control Strategy for Energy Storage Port of Electric Energy Router Based on Voltage and Power Feedforward[J/OL].Automation of Electric Power Systems,http://doi.org/10.7500/AEPS20190801002.

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历史
  • 收稿日期:2019-08-01
  • 最后修改日期:2020-02-26
  • 录用日期:2019-10-11
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