考虑快速充电站影响的前馈功率控制策略  

作　　者：李家强 

机构地区：[1]国网连云港市赣榆区供电公司,江苏连云港222199

出　　处：《科技创新与应用》2024年第16期87-90,共4页Technology Innovation and Application

摘　　要：当微电网应对大负荷快速投切时,直流母线容易产生大幅度电压波动,产生大量谐波电流。该问题导致系统效率大大降低,并且威胁系统稳定性。在微电网环境下,当充电功率变化速率过快时,容易导致上述问题。因此针对快速充电站接入微电网中所导致的直流母线电压波动的问题,提出一种含前馈功率的功率控制策略。当用户需要充电时,结合充电汽车的充电特性与用户充电需求,生成前馈功率曲线,再进行充电。通过MATLBAB/Simulink仿真进行对比分析,得出该控制策略控制方式相比于不含前馈功率的控制方式具有相应速度快,直流电压可以快速稳定,并且谐波含量少等优点,具有一定的参考价值。When the microgrid is quickly switched on and off under heavy load,the DC bus is easy to produce large voltage fluctuation and a large amount of harmonic current.This problem greatly reduces the efficiency of the system and threatens the stability of the system.In the microgrid environment,when the charging power change rate is too fast,it is easy to cause the above problems.Therefore,in order to solve the problem of DC bus voltage fluctuation caused by fast charging station connected to microgrid,a power control strategy with feedforward power is proposed.When the user needs to charge,combined with the charging characteristics of the rechargeable vehicle and the charging needs of the user,the feedforward power curve is generated and then charged.Through the comparative analysis of MATLAB/Simulink simulation,it is concluded that compared with the control method without feedforward power,this control strategy has the advantages of faster speed,fast and stable DC voltage and less harmonic content,so it has a certain reference value.

关 键 词：快速充电站 前馈功率控制 PWM 谐波电流 充电特性 

分 类 号：TM933[电气工程—电力电子与电力传动]