Power conversion system and method of converting power
First Claim
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1. 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.
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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.
272 Citations
25 Claims
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1. A power conversion system comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for converting power between a DC power source and an AC system comprising:
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(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. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification