三相电压型PWM整流器的滑模控制

Sliding Mode Control of Three-phase Voltage-source PWM Rectifier

通过采用状态反馈精确线性化方法,将三相电压型整流器非线性化模型转化为完全可控的线性系统布鲁洛夫斯基标准型。利用滑模变结构控制策略,把系统性能指标作为滑模函数,通过合理选择系数来重新配置系统极点,能使系统快速、平稳且无抖动地进入滑动模态面,从而确保网侧电流波形正弦化和功率因数为1,使无功输出为零;确保输出直流电压偏差为零,使得直流电压恒定。实验结果验证了所提出理论的正确性。

Non-linearization model of three-phase voltage source rectifier is translated into the controlled linearity system （Brunovsky model） by the precise state linearity in the thesis.Making use of the sliding mode variable structure control strategy,letting the system capability as the sliding mode function,system poles are placed again pass reasonable choice of the parameter,which can make system quick,steady and do not tremble to enters into sliding model. Consequently the current wave of electricity net side is ensured being sine,the power factor is approching unity,the reactive power output is equal to zero and the error of volts DC output is zero and invariable.Resuhs of experiment verify the correction of the presented theories.