Investigations in the Modeling and Control of a Medium-Voltage Hybrid Inverter System That Uses a Low-Voltage/Low-Power Rated Auxiliary Current Source Inverter

Papadopoulos, Savvas; Rashed, Mohamed; Klumpner, Christian; Wheeler, Patrick

Abstract

Hybrid converters consist of a main inverter processing the bulk of the power with poor waveform performance and a fast and versatile auxiliary inverter to correct the distortion. In this paper, the main converter is a medium-voltage (MV) neutral point-clamped inverter, and the auxiliary inverter is a low-voltage and low-current rated current source inverter (CSI), with series capacitor being used to minimize the CSI voltage stress. The result is a high output current quality, which is obtained with a very low switching stress in the main converter and a very small added installed power (<;4%) in the CSI. This paper expands this concept by investigating the hybridization of an MV inverter with an existing LCL filter, investigating the additional challenges related to resonances, and proposing a solution for stable operation. The experimental validation of active ripple cancellation has been provided at 3 kW.

• Journal Article Type: Article
• Acceptance Date: Oct 8, 2015
• Publication Date: 2016-03
• Deposit Date: Aug 19, 2019
• Publicly Available Date: Aug 26, 2019
• Journal: IEEE Journal of Emerging and Selected Topics in Power Electronics
• Print ISSN: 2168-6777
• Electronic ISSN: 2168-6785
• Publisher: Institute of Electrical and Electronics Engineers
• Peer Reviewed: Peer Reviewed
• Volume: 4
• Issue: 1
• Pages: 126-140
• DOI: https://doi.org/10.1109/jestpe.2015.2488631
• Keywords: active filters, noise cancellation, nonlinear filters
• Public URL: http://researchrepository.napier.ac.uk/Output/1800232
• Contract Date: Aug 19, 2019