A simple instantaneous power theory and compensation performance evaluation for active power filters

The fictitious power theory in time domain is very easy to understand, but the power-analyzing speed of active power filters is increased because of correlation algorithm. Also, conventional 3-D current coordinates for evaluating the performance of active power filters cannot evaluate the characteristics of nonlinear load currents, whether they are inductive or capacitive. Therefore, to solve such problems, this paper deals with the simple instantaneous power theory and the modified 3-D current coordinates for evaluating the compensation performance of active power filters. To confirm the validity, active power filters simulator is developed using C-language. From the simulation, results are discussed their utility.