Simulation of resonance and harmonic amplification in industrial distribution system

This paper presents a study of resonance and its impact on harmonic distortion in a typical industrial distribution system. The system utilised in the study is described and cases considered are detailed. The study is performed using frequency scan analysis with the aid of PSCAD and Matlab computer programs. The results, which visualize the impedance of the system at various frequencies, represent the impedance seen by harmonic source. The study has successfully revealed the resonance frequencies and associated magnitude of different cases of combined system impedance. The occurrence of resonance at these frequencies explains why harmonic distortion varies with the cases.