A noise rejection deadbeat control technique for active power filter

Compared with power filter, active power filter has a lot of advantages and it is an efficient technique to eliminate or limit the harmonic pollution in power system. However, the control of active power filter is very complex, and the control of current loop is the key part. Traditional active power filter has direct control to instant current, which will bring noise into control and affect stability of the system. Deadbeat control is one of the feasible current control techniques since the DSP implementation of APF is concerned. This paper proposes a noise rejection dead-beat technique for active power filter, in which the resetting integrator is used as an input filter. This method is robust to parameter changes, sampling noise and periodic noise. It has been shown that it can be adopted to improve the performances of APF.