Harmonic Propagation in Power Lines due to Converter Loads and Nonlinear Resistors

This paper describes the propagation of harmonic voltages and currents, generated by solid state power converters and nonlinear resistive loads in power systems. After establishing accurate harmonic models for a six pulse bridge rectifier and a nonlinear resistor supplied from non sinusoidal sources, a harmonic power flow technique, "Q-HARM", is used to compute the harmonic propagation in a sample power system. Design of appropriate filters to reduce the deleterious effects of injected harmonics, with special reference to communication line interference is also included.