HARMONIC-ANALYSIS FOR INDUSTRIAL CUSTOMERS

A power flow program is developed to analyze the harmonic distortion o f a power system with various types of harmonic loads. The proposed pr ogram can be applied to solve the harmonic current flow, voltage harmo nic distortion factor, resonance frequency, and current amplification factor at every bus in the system. In this study, a large metal factor y is selected for the harmonic power flow analysis. The current wavefo rms at every bus are measured and analyzed to determine various orders of harmonic components. These harmonic currents are used in the compu ter simulation to determine the harmonic voltage distortion factor at the buses of the system, and the variations of resonance impedance and amplification factor with frequencies are investigated. Finally, the program is used to calculate the harmonic load flow when the metal fac tory is expanded by including a new plant in the power system, and pro per filters are designed to alleviate the harmonic problems.