This paper describes a new algorithm for active power filters which can be control source current symmetrically under unbalanced condition in power system. Positive sequence voltage is detected by symmetrical coordinate method, and compensating refere...
This paper describes a new algorithm for active power filters which can be control source current symmetrically under unbalanced condition in power system. Positive sequence voltage is detected by symmetrical coordinate method, and compensating reference current of active power filters is calculated using by accurate phase angle information of positive sequence voltage. The basic principle of the proposed method is describe<! in detail, and the conventional and proposed phase detecting methods are compared and discussed through the simulation results.