Bidirectional converter for a stirling energy system
Date
2004-12
Authors
Redecker, H. H. (Hans Henning)
Journal Title
Journal ISSN
Volume Title
Publisher
Stellenbosch : University of Stellenbosch
Abstract
ENGLISH ABSTRACT: This thesis discusses a 23 kW three-phase AC bus system that is utilized together with the
“Stirling Energy System (SES) Integrated Solar Dish-Stirling Module” to function as a
mini-grid for off-grid locations. The system is designed to supply power to 27 rural
households. This three-phase AC bus system includes a bidirectional 4-wire PWM
converter and a battery bank for energy storage. The simulations and results presented
show that the system can function as a rectifier and as an inverter. The system operates as
an inverter when the SES starts up and when different AC loads are connected to the AC
bus. The unit functions as a rectifier when the battery bank is charged. The design was
implemented successfully in a practical system and measurements revealed that the
system functioned as a standalone unit.
AFRIKAANSE OPSOMMING: Hierdie tesis bespreek ‘n 23 kW drie-fase vier-draad WS bus stelsel wat saam met die “Stirling Energy System (SES) Integrated Solar Dish-Stirling Module” gebruik word om as ‘n alleenstaande stelsel in ’n plattelandse omgewing te laat funksioneer. Die sisteem is ontwerp om vir 27 plattelandse huise drywing te lewer. Hierdie stelsel behels ‘n drie-fase GS na WS omsetter, saam met loodsuur batterye as energiestoor. Die simulasies en resultate wat gegee word, dui aan dat die omsetter as ‘n wisselrigter en ook as ‘n gelykrigter kan werk. Die stelsel funksioneer as ‘n wisselrigter as die SES aanskakel, en as ekstra laste op die WS bus gekoppel word. Die sisteem funksioneer as ‘n gelykrigter as die batterye gelaai word. Die ontwerp is suksesvol in ‘n praktiese stelsel geimplimenteer wat as ‘n alleenstaande stelsel funksioneer.
AFRIKAANSE OPSOMMING: Hierdie tesis bespreek ‘n 23 kW drie-fase vier-draad WS bus stelsel wat saam met die “Stirling Energy System (SES) Integrated Solar Dish-Stirling Module” gebruik word om as ‘n alleenstaande stelsel in ’n plattelandse omgewing te laat funksioneer. Die sisteem is ontwerp om vir 27 plattelandse huise drywing te lewer. Hierdie stelsel behels ‘n drie-fase GS na WS omsetter, saam met loodsuur batterye as energiestoor. Die simulasies en resultate wat gegee word, dui aan dat die omsetter as ‘n wisselrigter en ook as ‘n gelykrigter kan werk. Die stelsel funksioneer as ‘n wisselrigter as die SES aanskakel, en as ekstra laste op die WS bus gekoppel word. Die sisteem funksioneer as ‘n gelykrigter as die batterye gelaai word. Die ontwerp is suksesvol in ‘n praktiese stelsel geimplimenteer wat as ‘n alleenstaande stelsel funksioneer.
Description
Thesis (MScIng)--University of Stellenbosch, 2004.
Keywords
Power electronics, Electric current converters, Renewable energy sources, Energy storage, Theses -- Electrical engineering, Dissertations -- Electrical engineering