【摘要】 为了提高有源电力滤波器(active power filter,APF)的工作可靠性,提出一种并联型有源电力滤波器选择性限流降容量运行方法。当APF逆变器发生容量不足情况时,该方法不是简单的对补偿电流进行限幅;而是根据实际情况灵活地选择补偿目标,合理取舍。在指定次谐波检测算法的基础上,首先舍去含有率低于1%的谐波,并设定优先级和谐波补偿系数δn;通过δn定步长递减,逐步舍去优先级较低的谐波,直至参考电流值低于最大允许值为止。仿真和实验结果证明了该方法的有效性。更多还原

【Abstract】 A kind of selective current limiting and capacity reduction operation method of shunt active power filter is proposed in order to improve the working reliability of active power filter(APF). In case of insufficient capacity of APF inverter,the method is not simple to limit the compensation current,but to choose the compensation target flexibly and reasonable trade-off in accordance with the actual situation. On the basis of specified sub-harmonic detection algorithm,the harmonics containing less than 1% are eliminated firstly and the priority and harmonic compensation coefficient δnare set. The harmonics with the lower priority are eliminated gradually through the constant step decreasing of δnuntil the reference current value is lower than the maximum allowable value. The effectiveness of the method is proved by simulation and experimental results.更多还原