Selective harmonic control for power converters

Abstract

Abstract-This paper proposes an Internal Model Principle (IMP) based Selective Harmonic Controller (SHC) for power converters. The proposed SHC offers an optimal control solution for power converters to mitigate power harmonics. It makes a good trade-off among cost, complexity and performance. It has high accuracy and fast transient response, and it is cost-effective, easy for real-time implementation, and compatible for design rules-of-thumb. An application on a threephase PWM converter has confirmed the effectiveness of the proposed control scheme in terms of harmonic mitigation.

A Simplified Synchronous Pulse-Width Modulation Method for Three-level Inverter of High-speed Train

“…In the synchronous modulation mode stage, the output fundamental voltage of the inverters controlled by the conventional regular-sampled PWM can't reach the voltage command, which makes it difficult to transform the modulation mode to square wave [9]. Hence, several synchronous optimal PWM strategies are developed, such as selected harmonic elimination PWM (SHEPWM) [10][11][12][13][14], minimum ripple current PWM [15], and so on. However, for all these synchronous optimal PWM, the switching angles are often calculated offline and determined using values stored in look-up tables [16].…”