谐波域死区效应分析及补偿方法的研究

摘要

Dead-time exists in the active power filters. By using the influence parameter of dead-time effect, this paper carries on the quantitative simulation analysis of dead-time in fundamental component and harmonic domain. Combining the application experience, three methods of dead-time compensation are discussed in this paper, including no dead time switch mode, novel current feedback dead time compensation method and dead time pre-compensation method. Simulation and experimental results show the efficiency of thses methods.%针对有源电力滤波器存在的死区问题,本文从基波域和谐波域进行定量分析,并利用死区效应影响系数,对不同死区时间及开关频率等条件下死区对有源电力滤波器(APF)输出的影响进行深入研究.结合工程经验及APF工作的特点,比较研究了3种实用的死区补偿方法,包括:无死区开关控制模式、新型电流反馈死区补偿方法及死区时间在线预补偿方法.为验证该文所述死区补偿方法的有效性,在实验室搭建注入式混合型有源电力滤波器实验平台,实验结果表明,采用该文所述死区补偿方法后,死区的不良影响得到了有效抑制.