Power conversion system and method of converting power
AssigneeCurtin University of Technology
InventorsChemmangot V. Nayar, Michel Malengret, Lawrence J. Borle, Hooman Dehbonei
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Abstract
A power conversion system includes a first converter having a DC side and an AC side and a second converter having a DC side and an AC side. The DC sides of the converters are connected in series with a battery connected in parallel across the DC side of the first converter. The AC sides of the converters are connected in parallel across an AC voltage grid. A DC generating power source is coupled across the DC sides of both converters. The first converter is bi-directional with the second converter being either an inverter providing DC to AC conversion or alternately a bi-directional inverter.
Claims25
A power conversion system comprising:
- a first converter including a DC side and an AC side;
- a second converter including a DC side and an AC side;
- a bi-directional electrical energy storage device;
- and
- a DC uni-directional energy source;
- wherein the DC sides of said first and second converters are connected together in series, said bi-directional electrical energy storage device is connected in parallel to the DC side of said first converter, and said DC uni-directional energy source is coupled across the DC sides of said first and second converters.
A method for converting power between a DC power source and an AC system comprising:
- (a) providing first and second converters, each having an AC side and a DC side;
- (b) providing an electrical energy storage device;
- (c) connecting the DC sides of said first and second converters together in series;
- (d) connecting the AC sides of said first and second converters together in parallel;
- (e) connecting said electrical energy storage device in parallel across the DC side of said first converter;
- (f) providing a DC port for connecting said DC power source across the DC sides of said converters;
- and
- (g) providing AC ports for connecting said AC system in parallel across the AC side of said converters;
- wherein, when an AC system is coupled to said AC ports and a DC power source is connected to said DC port, power from the DC power source can flow through said converters to said energy storage device and said AC system;
- power from said electrical energy storage device can flow through said first converter to said AC system;
- and, power from said AC system can flow through said first converter to said electrical energy storage device.
Dependencies are inferred from the claim text.