一种大功率能量回馈装置的实现方法
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摘要
通过调整单极性SPWM波的占空比驱动推挽电路中的功率管,将受试端的DC直流源(DC直流源可以是电源模块、PN母线端、电池组及其他储能设备)通过高频变压器隔离变送到副边整流滤波电路,而高频整流滤波后的半波电压经换相控制还原成与电网同频同相正弦波电压回馈到电网,实现大功率的能量回馈。该装置电路结构简单,推挽逆变中的互锁电路提高了推挽功率管的抗扰能力。通过调制钳位回馈电路中的PWM信号,降低推挽电路中的功率管开关损耗,并将变换器的二次能量回馈到DC直流源。整个电路单级架构实现大功率输出,从而在并网回馈能量时很好地抑制电路中的环流。
The power tube in the Push-Pull circuit is Driven by adjusting the duty cycle of the unipolar SPWM wave.And the DC source of the test terminal(DC source can be power module,PN bus terminal,battery pack and other energy storage devices) is sent to the secondary side rectification filter circuit through high frequency transformer isolation.The halfwave voltage after high-frequency rectification and filtering is restored by commutation control to the same-frequency inphase sinusoidal voltage feedback to the grid,implement high-power energy feedback.The circuit is simple in structure.Interlocking circuit in push-pull inverter improves the anti-interference ability of Push-Pull power tube.By modulating the PWM signal in the clamp feedback circuit,the power tube switching loss in the Push-Pull circuit can be reduced,and the secondary energy in the converter is fed back to the DC source.The whole circuit can realizes high-power output by the single-stage architecture.,and it can suppress the circulation in the circuit well when the grid is fed back.
The power tube in the Push-Pull circuit is Driven by adjusting the duty cycle of the unipolar SPWM wave.And the DC source of the test terminal(DC source can be power module,PN bus terminal,battery pack and other energy storage devices) is sent to the secondary side rectification filter circuit through high frequency transformer isolation.The halfwave voltage after high-frequency rectification and filtering is restored by commutation control to the same-frequency inphase sinusoidal voltage feedback to the grid,implement high-power energy feedback.The circuit is simple in structure.Interlocking circuit in push-pull inverter improves the anti-interference ability of Push-Pull power tube.By modulating the PWM signal in the clamp feedback circuit,the power tube switching loss in the Push-Pull circuit can be reduced,and the secondary energy in the converter is fed back to the DC source.The whole circuit can realizes high-power output by the single-stage architecture.,and it can suppress the circulation in the circuit well when the grid is fed back.
引文
[1]张立.现代电力电子技术基础[M].北京:高等教育出版社,1999.
[2]阮新波,严仰光.直流开关电源的软开关技术[M].北京:北京科学出版社,2003.
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[4]杨正龙,王慧贞.一种新型推挽正激变换器[J].电力电子技术,2002,(1):36-39.
[5]张方华,王慧贞,严仰光.新颖正激推挽电路的研究及工程实现[J].南京航空航天大学学报,2002,(5):451-455.
[2]阮新波,严仰光.直流开关电源的软开关技术[M].北京:北京科学出版社,2003.
[3]张国安,朱宗尼,元迎川.辅助谐振推挽式PWM软开关技术研究[J].电力电子技术,1997,11(4):20-22.
[4]杨正龙,王慧贞.一种新型推挽正激变换器[J].电力电子技术,2002,(1):36-39.
[5]张方华,王慧贞,严仰光.新颖正激推挽电路的研究及工程实现[J].南京航空航天大学学报,2002,(5):451-455.
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