The present work was focused on high-power parallel DC system scheme and current sharing technology scheme of substations.It selected the most suitable parallel DC supply scheme for substations,analyzed current sharing technology and current sharing control under parallel DC,and proposed an improved average current method.It finally modeled the circuit and the control loop by MATLAB/Simulink,and conducted design and simulation of the system scheme and the current sharing scheme.The results showed that the hybrid parallel scheme has high reliability,high charge and discharge efficiency,and appropriate redundancy,so it is selected as the parallel DC supply scheme.The closed-loop control of the improved current sharing system can meet the stability requirements of control loop,respond quickly to current sharing demand,and tolerate a very high interference,hence the improved average current method has high current sharing accuracy and good reliability.
关键词
变电站/并联直流供电系统/多充放电回路/主动均流
Key words
substation/parallel DC power supply system/multi-charge and discharge circuit/active current sharing
维普
万方数据