Design and implementation of a single-phase three-wire transformerless battery energy storage system

This paper presents a single-phase three-wire (1/spl phi/3w) transformerless battery energy storage system (BESS). Its power circuit is simple, since it consists of only one power converter. It has three legs to provide 1/spl phi/3w 220/110 V output without the use of a transformer. For switching co...

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Bibliographic Details
Published inIEEE transactions on industrial electronics (1982) Vol. 41; no. 5; pp. 540 - 549
Main Authors Liaw, C.M., Chiang, S.J.
Format Journal Article
LanguageEnglish
Published New York, NY IEEE 01.10.1994
Institute of Electrical and Electronics Engineers
Subjects
Applied sciences
Batteries
Circuits
Electrical engineering. Electrical power engineering
Energy storage
Exact sciences and technology
Leg
Load management
Power electronics, power supplies
Power generation
Power supplies
Power system protection
Voltage control
Wire
Experimental result
Accumulator charge
Function block diagram
Control system
Battery
Switching function
Theoretical study
Secondary cell
Power electronics
Energy storage
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Summary:This paper presents a single-phase three-wire (1/spl phi/3w) transformerless battery energy storage system (BESS). Its power circuit is simple, since it consists of only one power converter. It has three legs to provide 1/spl phi/3w 220/110 V output without the use of a transformer. For switching control, the BESS is decoupled into differential-mode and common-mode subsystems. Each subsystem has its own inner-loop current-forced switching control mechanism; their current commands at various operating modes are generated by outer-loop controllers. The controllers of the differential mode are designed to control the main voltage (220 V) source, while achieving the desired functions of BESS. As to the common-mode subsystem, its controllers are used to maintain the voltage balance of two subcircuits (110 V circuits) when the utility grid fails, and to keep the current in neutral line of utility grid at zero when the utility grid is in normal condition. The operation principle of the proposed BESS and the design of controllers in various operating modes are described in detail. Some experimental results are provided to show the performance of the proposed BESS.< >
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0278-0046
1557-9948
DOI:10.1109/41.315273