ABSTRACT

Harmonic contributions can be decreased in Power System Transmission and Distribution by planning the voltage harmonic levels in the acceptable limits so that Harmonic pollution can be limited to some extent. In this research paper, These harmonic contributions are evaluated and measured at Point of Common Coupling (PCC) by using Harmonic Power Direction Method and Critical Impedance method. The locations of harmonic sources in the power system can be identified by using Harmonic Power Direction Method. Determination of both utility and customer harmonic contributions at point of common coupling is somewhat difficult task and that depends on connected loads, background of the loads and power system configuration. In this research paper, we tries to explain Harmonic Power Direction Method and Critical Impedance methods which can solve this problem and identifies the sharing responsibilities of harmonic contributions between utility and customer