Development of a simulator for compensation performance evaluation of hybrid active power filter using three-dimensional current co-ordinate

This paper describes an effort to develop a simulator of a hybrid active power filter (hybrid APF) using three dimensional (3-D) space current co-ordinate system. System current is represented by a 3-D vector composed of three current components-active, reactive and distorted components. System current vector and power factor are defined on a 3-D space current co-ordinate system without loss of generality, and height-angle of system current vector replaces %THD of system current as a new standard. Physical meanings of power network parameters introduced in this paper are discussed in detail. APF and power system current are analyzed more accurately using 3-D visualization of the current vector trajectory. A developed APF simulator shows excellent performance as a digital power analyzer for network parameters of power systems and APFs. To show the validity of the proposed method, computer simulation was performed. From the results of this simulation, the proposed method using a 3-D space current co-ordinate system made up for the disadvantages of performance evaluation in the conventional time/frequency domain