Application of Carrier-Wave PWM Scheme on CHB-Based STATCOM

Abstract:

Two kinds of multiple carrier-wave PWM schemes are analyzed and compared in detail. The phase-shifted PWM method is proved to be suitable to the cascaded H-bridge (CHB) inverter-based STATCOM because of the same device switching frequency and conduction time. More harmonics can be eliminated and device power losses can be reduced. Based on this modulation scheme, a novel dc capacitor voltage detection and balance control is developed. The simulation is performed in Simulink environment and the experiment prototype based on DSP is built. The simulation and experiment results show the correctness and feasibility of the proposed methods.

• Periodical: Advanced Materials Research (Volumes 433-440)
• Pages: 5767-5774
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.433-440.5767
• Online since: January 2012
• Authors: Yi Dan Li, Wen Sheng Lu, Ming Liang Guo, Hong Yang Liu
• Keywords: Carrier-Wave, Cascaded H-Bridge Inverter, Phase Shifted PWM, Static Synchronous Compensator

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