Design and Implementation of a STATCOM Based on a Multilevel FHB Converter with Delta-Connected Configuration for Unbalanced Load Compensation

• Main Authors: Wei-Neng Chang, Ching-Huan Liao
• Format: Article
• Language: English
• Published: MDPI AG 2017-07-01
• Series: Energies
• Subjects: FHB; hardware test; load compensation; STATCOM; symmetrical components method
• Online Access: https://www.mdpi.com/1996-1073/10/7/921

A delta-connected STATCOM with cascade multilevel full H-bridge (FHB) converter has been applied for phase balancing and power factor correction of unbalanced load in a three-phase, three-wire power distribution system. In this paper, a feedforward compensation formula is presented for the STATCOM by using the symmetrical components method to compensate unbalanced load. Computer simulation is performed for preliminary verification. Accordingly, a hardware prototype employing a TMS320F2812 DSP-based system is built for final verification test. Experimental results show that the proposed STATCOM is very effective for real-time unbalanced load compensation.