Free Switching Control Strategy for Multi-Operation Modes of Multi-Port Energy Router in Distribution Area

Energies

Lan Liu¹  Shumei Chi²  Zhipeng Lv²  Yang Shan³ 

[1] China Electric Power Research Institute Co., Ltd., Beijing 100192, China;College of Electronics and Information Engineering, Shanghai University of Electric Power, Shanghai 200090, China;Zenergy Tech Co., Ltd., Nanjing 211500, China;

关键词: distribution area;    multi-port energy router;    multi-operation modes;    power flow;    virtual synchronous machine;    free switching control strategy;   

DOI  :  10.3390/en14237860

来源: DOAJ

【 摘 要 】

For the distribution area with a high penetration rate of new energy, the traditional power supply system has some problems, such as a single form of power supply and low utilization of new energy. Because the multi-port energy router can realize the interconnection and complementation of multiple energy forms, it has become the key piece of equipment in the hybrid AC/DC distribution area. Nevertheless, restricted by the existing control strategy, the performance of the energy router in complex operation mode switching and coordinated control still needs to be further improved. To address this issue, the free switching control strategy is proposed in this paper. Firstly, the topology and model of the multi-port energy router are designed and established. Secondly, the operation mode of the system is analyzed, and the control strategy of each port is designed. Then, a reference power calculation method suitable for multi-mode operation is derived. Based on this, the control strategy does not need to be changed when operation modes are switched. Furthermore, the extended state observer is introduced to track and compensate for the new energy disturbance, which can improve the power quality of the system. Finally, the simulation and experimental results show that the proposed control strategy of the multi-port energy router can realize flexible and controllable power transmission among various modules in the distribution area and the free switching of multi-operation modes without changing the control strategy.

【 授权许可】

Unknown