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为了解决对有源电力滤波器存在的死区影响问题,对死区效应产生的机理进行了详细分析,对不同的死区时间及不同开关频率条件下死区对有源电力滤波器输出的影响进行了研究。结合工程经验和有源电力滤波器工作的特点,提出了电流反馈死区和无死区开关控制模式两种补偿方法,并通过实验室搭建的注入式混合型有源电力滤波器实验平台进行实验,结果表明,采用所述死区补偿方法,死区的不良影响得到有效的抑制,取得了较为理想的效果。
In order to solve the problem of the dead zone of active power filter, the mechanism of dead zone effect is analyzed in detail. The influence of dead zone and dead zone on the output of active power filter under different dead time and different switching frequency is analyzed Were studied. Combined with the engineering experience and the characteristics of the active power filter, two compensation methods, current-feedback dead zone and dead-zone-free switch control mode, are proposed. Experiments are carried out on the experimental platform of hybrid active power filter The results show that using the dead zone compensation method, the adverse effects of the dead zone can be effectively suppressed, and a more satisfactory effect has been achieved.