A hybrid energy storage system based on compressed air and supercapacitors with maximum efficiency point tracking

This paper presents a hybrid energy storage system based on Compressed Air Energy Storage (CAES), where the extraction of energy is done within maximum efficiency conditions. As the maximum efficiency conditions impose the level of converted power, an intermittent time-modulated operation mode is applied to the thermodynamic converter to obtain a variable converted power. A smoothly variable output power is achieved with the help of a supercapacitive auxiliary storage device. The paper describes the concept of the system, the power-electronic interface circuits and especially the Maximum Efficiency Point Tracking (MEPT) algorithm and the strategy used to vary the output power. Practical results are also presented, recorded from a low-power pneumatic motor coupled to a small DC generator.


Presented at:
ANAE : Associazione Nazionale Azionamenti Elettrici, 15o Seminario Interattivo, Azionamenti elettrici : Evoluzione Tecnologica e Problematiche Emergenti, Bressanone, Italy, 22-24 March 2004
Year:
2004
Laboratories:


Note: The status of this file is: EPFL only


 Record created 2006-07-10, last modified 2018-03-17

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