基于i_p-i_q法和单周控制的三相有源电力滤波器

Three-Phase APF Based on i_p-i_q Method and One-Cycle Control

为了解决单周控制的三相有源电力滤波器的不足,本文将基于瞬时无功功率理论的ip-iq谐波检测法和单周控制相结合,以基波电流作为控制参考,运用于三相三线制有源电力滤波器中,并建立控制方程和控制电路。通过仿真验证了在电网电压存在畸变时,有源电力滤波器的补偿效果良好,且可以根据对谐波和无功电流灵活补偿。方案还可以运用到三桥臂三相四线制有源电力滤波器中。

In order to solve the disadvantages of one-cycle controlled three-phase APF, this paper uses ip-iq harmonics detecting method based on instantaneous reactive power theory, tracing control circuit based one-cycle control which uses fundamental current as control reference to three-phase three-wire APF. The control equations and control circuit are set up. The results of simulation verify this scheme is effective, and in this scheme APF can compensate harmonic and reactive currents with the distorted source voltages flexibly, This scheme also can be used in three-phase four-wire APF with three-leg.