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

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。

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

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 feed 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.