This paper describes a damping control method of power converters for suppression of resonance in DC power network. The resonance occurs when a resonant frequency of the DC distribution line coincides with the frequency of the harmonic or interharmonic components generated by the power converters. For detailed investigation, a combined system which consists of a pulse-width modulated (PWM) rectifier and a PWM inverter is treated as the simplest example. To suppress the resonance, a DC-side damping control method is proposed and its implementation and design method are discussed in detail. Then, the proposed damping control method is applied to the combined system of a PWM rectifier and a PWM inverter. Experimental results verify the validity and practicability of the proposed damping control method. © 2012 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

A DC‐side damping control method for power converters to suppress resonance in DC power network

Interharmonics are defined as non-integer multiplies of fundamental or switching frequencies and have several different effects in PCC connected VSI/CSI systems compared to known harmonics In order to describe the generation of harmonics and interharmonics in generalized power converters, a new approach is proposed based on the non-linear modulator concept; and the analytical model is derived and discussed for commonly used control scheme of d-q reference frame Several effects of feedback control and compensation blocks are considered, analyzed and simulated for the analysis validation

Dian Guo Xu

Papers

Harmonics and interharmonics generation in general VSI/CSI inverters: a new +approach