Realization of a 10 kW MES Power to Methane Plant Based on Unified AC/DC ConverterRealization of a 10 kW MES Power to Methane Plant Based on Unified AC/DC Converter
Location: Portland, OR, USA
Publication date: 2018-09-23
Published in: IEEE Energy Conversion Congress and Exposition 2018, Portland (USA) - ECCE 2018
ref. DOI: 10.1109/ECCE.2018.8558013

Local members

Alvaro Luna

PhD. Senior Researcher.

Joan Rocabert

PhD. Senior Researcher

Mahdi Shahparasti

PhD. Junior Researcher

External members

Pau Bosch



This paper presents a galvanic isolated multi output AC/DC topology that is suitable for Microbial electrosynthesis (MES) based Power to Methane energy storage systems. The presented scheme utilizes a three phase back to back converters, a single-input and multiple-output three phase transformer, single diode rectifiers and buck converters that employ a proper interconnection between MES cells and the mains. The proposed topology merges all the required single phase AC/DC converters as a unified converter which reduces the overall system size and provides system integrity and overall controllability. The proposed control scheme allows to achieve the following desired goals:1) Simultaneous control of all cells; 2) Absorbing power from the grid and covert to methane when the electricity price goes down; 3) the power factor and the quality of grid current is under control; 4) Supplying MES cells at the optimal operating point. For verification of system performance, Real time simulation results that are obtained from a 10-kW MES energy storage are presented.