摘要
为提高三相电压型PWM整流器性能,在整流器功率数学模型基础上,根据整流器能量流动方式,确定电感、电容存储能量与整流器输出能量的数学关系。根据上述数学关系,提出采用电感、电容功率动态与负载功率静态相结合的功率前馈方法。动态前馈将电感、电容消耗的能量分阶段前馈至整流器,静态前馈将PI控制器输出功率前馈至整流器,从而使网侧电流稳定,减少直流母线电压波动。仿真结果表明,与传统负载功率前馈策略相比,采用动态与静态相结合的功率前馈策略能够抑制网侧谐波分量,降低直流母线电压波动量。
In order to improve the performances of three-phase voltage-source PWM rectifier,based on rectifier power mathematical model and PWM rectifier energy flow model,we found out the mathematical relationship between inductance and capacitance＇s stored energy and rectifier output energy.According to the mathematical relationship,we proposed a power feed-forward method which combines dynamic power of inductance and capacitance with static load power.The inductance and capacitance power was fed to the rectifier in several periods with the dynamic feedforward method,and the output value of PI controller was fed to rectifier with the static feed-forward method.By this way,line-side current is stable and DC-bus＇ s voltage fluctuation can be decreased.The simulation result shows that the feed-forward method which combines dynamic power and static load power can restrain line-side＇ harmonic and reduce DC-bus voltage fluctuation compares with traditional load power feed-forward method.
出处
《计算机仿真》
北大核心
2017年第3期100-104,共5页
Computer Simulation
基金
国家自然科学基金资助项目(U1404512)
河南省教育厅计划项目(15A470012)
关键词
整流器
能量流动
功率前馈
动态前馈
Rectifier
Energy flow
Load power feed-forward
Dynamic feedforward
