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。逆变器采用固定开关频率的直接电流控制方法中的预测电流控制,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 using PWM converter instead of uncontrolled diode rectifier,which not only reduces the harmonic pollution to the grid but also can realize two-way flow of energy.Double closed loop of voltage and current control ensures the stability of DC-side voltage and the tracking of AC-side current to the voltage.The inverter adopts current forecast control,which is a kind of control plan in direct current control of fixed switching frequency control.The inner current loop adopts the proportional adjustment and improve the current response.Voltage feedback loop applies voltage RMS of PI adjustment,to ensure the stable output voltage inverter control.The output voltage of inverter is compensating voltage.It is series with the input voltage of stabilized power supply to get the output voltage.The design of power supply is simulated by the Simulink which verifies the feasibility of the control strategy.Finally the results of design are validated by experiment.
出处
《电气传动自动化》
2011年第1期26-29,共4页
Electric Drive Automation
关键词
补偿型稳压电源
PWM整流器
逆变器
闭环控制
仿真
compensation the power supply PWM rectifier inverter closed-loop control simulation
