Asymmetric multilevel topology for photovoltaic energy injection to microgrids

Munoz, Javier; Gaisse, Patricio; Baier, Carlos; Rivera, Marco; Gregor, Raul; Zanchetta, Pericle

Abstract

The massive penetration of renewable energy sources in the utility grid has emerged as the solution to obtain clean energy in modern electric systems, which are gradually replacing their generators that produce CO2 emissions to achieve a sustainable growing. Power electronics is quite relevant in the deep penetration of renewable energy, because the use of such equipment is mandatory to integrate these new resources with the existing facilities. In order to reach higher power ranges, multilevel topologies are the state-of-the-art solution, due to the limited rating of the actual semiconductor devices. Furthermore, latest trends show that asymmetric multilevel configurations are an attractive technology to connect directly the power converters to the grid. This paper analyze the photovoltaic energy injection to microgrids using a hybrid approach that mixes the existing topologies: string, multistring and central inverter to implement an asymmetric structure that generate highly sinusoidal resulting waveforms. This document includes a simple analysis of the proposed configuration and highlights the advantages of using an asymmetric converter, supported with stationary and dynamic simulated results.

Citation

Munoz, J., Gaisse, P., Baier, C., Rivera, M., Gregor, R., & Zanchetta, P. Asymmetric multilevel topology for photovoltaic energy injection to microgrids. Presented at 2016 IEEE 17th Workshop on Control and Modeling for Power Electronics (COMPEL)

• Conference Name: 2016 IEEE 17th Workshop on Control and Modeling for Power Electronics (COMPEL)
• End Date: Jun 30, 2016
• Acceptance Date: Apr 6, 2016
• Online Publication Date: Sep 1, 2016
• Publication Date: Jun 27, 2016
• Deposit Date: Jun 28, 2017
• Publicly Available Date: Jun 28, 2017
• Peer Reviewed: Peer Reviewed
• Keywords: Asymmetric Multilevel Converters, Photovoltaic Energy Injection, Microgrids
• Public URL: https://nottingham-repository.worktribe.com/output/793365
• Publisher URL: http://ieeexplore.ieee.org/document/7556665/
• Contract Date: Jun 28, 2017