基于EPT的储能系统软启动控制策略  

Soft-starting Control Strategy of Energy Storage System Based on Electronic Power Transformer

作　　者：王强 郭伟 杨策 WANG Qiang;GUO Wei;YANG Ce(College of Electrical Engineering and New Energy,China Three Gorges University,Yichang 443002,China)

机构地区：[1]三峡大学电气与新能源学院,宜昌443002

出　　处：《电力系统及其自动化学报》2022年第12期43-50,60,共9页Proceedings of the CSU-EPSA

摘　　要：电子电力变压器在出现电网电压跌落或者中断时不能正常运行,但单个DC/DC端口的储能系统投入瞬间会对系统产生扰动进而影响供电质量。本文将一种多电池组的多端口DC/DC变换器的软启动控制方式应用在电子电力变压器中,对各端口的启动控制方法进行详细分析,使储能系统在投切的同时减小冲击电流,并在电网电压发生电压跌落或者中断时,储能系统能够平稳提供功率来保持电子电力变压器低压直流侧电压的稳定。在Matlab/Simulink环境下,仿真结果验证了软启动方式下多电池组多端口DC/DC变换器储能系统应用在电子电力变压器输出侧的有效性,可以保证用电设备的安全、稳定运行。An electronic power transformer(EPT)cannot operate normally when the grid voltage drops or interrupts.However,an energy storage system(ESS)with a single DC/DC port will cause disturbance to the system and affect the quality of power supply.To solve this problem,a soft-starting control method for a multi-port DC/DC converter(MPC)with multiple battery packs is applied to the EPT,and the start-up control method for each port is analyzed in detail,so that the ESS can reduce the impulse current while switching.In addition,when the grid voltage drops or interrupts,the ESS can steadily provide power to maintain the stability of the low-voltage DC-side voltage of EPT.The simulation results in a Matlab/Simulink environment verify the effectiveness of the application of MPC ESS with multiple battery packs on the EPT output side in the soft-starting mode,indicating that the proposed strategy can ensure the safe and stable operation of electrical equipment.

关 键 词：电子电力变压器 储能系统 电压跌落 软启动 

分 类 号：TM42[电气工程—电器]