摘要
应用PWM整流器代替二极管不可控整流,既减少对电网的谐波污染,又可以实现能量双向流动。电压电流双闭环控制保证了直流侧电压的稳定和交流侧电流对电网电压的跟踪。逆变器采用了固定开关频率的直接电流控制方法中预测电流控制,电流内环采用比例调节,提高了电流响应速度。电压外环采用电压有效值反馈的PI调节,保证对逆变器输出电压的稳定可靠控制。逆变器的输出电压是补偿电压,与稳压电源的输入电压串联叠加得到稳压电源的输出电压。利用Simulink仿真工具,对所设计的电源进行仿真,验证了控制策略的可行性。最后做实验验证了设计结果。
The design in this paper used PWM converter instead of diode rectifier,which not only reduced the harmonic pollution to the grid but also can realized two-way flow of energy.Double closed loop control of voltage and current ensures the stability of DC voltage and the tracking of AC current to the voltage.The inverter adopts current forecast control,which is a fixed switching frequency control method in direct current control.The current loop adopted the proportional adjustment to improved the current response.Voltage feedback loop using PI control of voltage RMS to ensure the stable and reliable control of the inverter＇s output voltage.The output voltage of inverter is compensating voltage.It is series with the voltage stabilizer input voltage to obtain the output voltage.Using the Simulink,the design of power supply can be simulated.Finally the design results are verified by experiments.
出处
《电工技术学报》
EI
CSCD
北大核心
2011年第11期88-91,120,共5页
Transactions of China Electrotechnical Society
关键词
补偿型稳压电源
PWM整流器
逆变器
闭环控制
仿真
Compensation type power supply
PWM rectifier
inverter
closed-loop control
simulation
