Abstract：In applications of power electronic converters, the delay and error in sampling are sometime main factors which limit the control performance. This paper investigates this problem on a three-level pulse width modulation (PWM) rectifier with direct power control, analyzes the influences on direct power control (DPC) performance caused by sampling delay and error in detail. Based on the characteristics of various physical quantities and their carriers in sampling system, the method for reducing the sampling delay and restraining the sampling error is proposed in order to optimize the control performance. By implementing the method, the steady-state performance of the rectifier improves remarkably. Experimental results verify the validity and feasibility of the proposed method.
鲁挺, 赵争鸣, 张颖超, 袁立强. 采样延迟和误差对三电平PWM整流直接功率控制性能的影响及其抑制方法[J]. 电工技术学报, 2010, 25(3): 66-72.
Lu Ting, Zhao Zhengming, Zhang Yingchao, Yuan Liqiang. Effect of Sampling Delay and Error on Direct Power Control Performance of Three-Level PWM Rectifier and Its Restraining Method. Transactions of China Electrotechnical Society, 2010, 25(3): 66-72.
2010, Vol. 25 
