| 电流环时序方法在PWM整流器中的应用 |
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| 引用本文： | 王剑,李永东.电流环时序方法在PWM整流器中的应用[J].清华大学学报(自然科学版),2009(10). |
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| 作者姓名： | 王剑 李永东 |
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| 作者单位： | 清华大学电机工程与应用电子技术系; |
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| 摘 要： | 为了提高大容量脉冲宽度调制(pulse-width modulation,PWM)整流器的电流环带宽,将一种新的采样-计算-更新时序方法应用于电流环。该方法利用高速微处理器的运算能力,消除了电流环中的计算延时,但同时限制了整流桥交流侧电压矢量的幅值,降低了电网电压升高时PWM整流器对交流侧电流和直流母线电压的控制能力。利用PWM整流器功率因数可调的优点,在电网电压升高时控制PWM整流器从电网吸收一定的无功功率,可以对此进行一定的补偿。实验表明,该方法的应用显著增加了电流环带宽,配合对无功电流的控制,提高了PWM整流器的性能。
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| 关 键 词： | PWM整流器 电流环 带宽 无功功率 |
PWM rectifier using a time sequencing method in the current control loop |
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| WANG Jian,LI Yongdong.PWM rectifier using a time sequencing method in the current control loop[J].Journal of Tsinghua University(Science and Technology),2009(10). |
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| Authors: | WANG Jian LI Yongdong |
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| Institution: | Department of Electrical Engineering;Tsinghua University;Beijing 100084;China |
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| Abstract: | The bandwidth of the current control loop in high-power pulse-width modulation(PWM) rectifiers is increased by a time sequencing method for sampling,calculating and updating in the current loop.A high-speed microprocessor is used to eliminate the calculational delay in the current loop.However,the method imposes some limitations on the output voltage on the AC side,which degrades the capability to control the AC current while maintaining the DC voltage when the utility voltage increases significantly.With i... |
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