Hybrid power converter for renewable energy power plant
First Claim
1. A hybrid power converter system comprising:
- a first power bus comprising one or more photovoltaic modules connected with a DC bus;
a first and a second three-phase power converter, each configured for converting DC power to AC power, and connected in parallel with the first power bus;
a second power bus connected to an AC load and/or an AC grid, and connected to each of the first and second three-phase power converters by a switch;
a third power bus connected to one or more energy storage device and connected to each of the first and second three-phase power converters by a switch;
provided that, during use, when one of the switches between the first three-phase power converter and the second or third power bus is open the other is closed, and when one of the switches between the second three-phase power converter and the second or third power bus is open the other is closed, whereby power is capable of being delivered from the one or more photovoltaic modules through the second power bus to the AC load and/or the AC grid, and/or power is capable of being delivered from the one or more energy storage device through the third power bus to the AC load and/or the AC grid to supplement or replace power from the one or more photovoltaic modules.
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Accused Products
Abstract
A hybrid power converter system that comprises a first power bus connected to a DC power source, a second power bus connected to an AC load, and a third power bus connected to an energy storage device. One or more power converters are connected to the first power bus in parallel and are connected with the second and third power buses, each by a switch. The system includes a first switch for connecting or disconnecting a power converter to or from the second power bus and a second switch for connecting or disconnecting the power converter to or from the third power bus, to switch the source of power being provided to the AC load either from the DC power source or the energy storage device. With additional power converters connected into the system in a similar manner, several combinations of power supply are possible.
22 Citations
11 Claims
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1. A hybrid power converter system comprising:
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a first power bus comprising one or more photovoltaic modules connected with a DC bus; a first and a second three-phase power converter, each configured for converting DC power to AC power, and connected in parallel with the first power bus; a second power bus connected to an AC load and/or an AC grid, and connected to each of the first and second three-phase power converters by a switch; a third power bus connected to one or more energy storage device and connected to each of the first and second three-phase power converters by a switch; provided that, during use, when one of the switches between the first three-phase power converter and the second or third power bus is open the other is closed, and when one of the switches between the second three-phase power converter and the second or third power bus is open the other is closed, whereby power is capable of being delivered from the one or more photovoltaic modules through the second power bus to the AC load and/or the AC grid, and/or power is capable of being delivered from the one or more energy storage device through the third power bus to the AC load and/or the AC grid to supplement or replace power from the one or more photovoltaic modules. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of managing energy provided to an AC load and/or an AC grid, the method comprising:
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monitoring an amount of power available from one or more photovoltaic (PV) modules connected with a DC bus; identifying a change or potential change in power output from the one or more PV modules, wherein the one or more PV modules and the DC bus are part of a hybrid power converter system further comprising; a first and a second three-phase power converter, each configured for converting DC power to AC power, and connected in parallel with the DC bus; a second power bus connected to an AC load and/or an AC grid and each of the first and second three-phase power converters by a switch; a third power bus connected to one or more energy storage device and connected to each of the first and second three-phase power converters by a switch; in response to identifying a reduced amount of power from the one or more PV modules, directing power to flow to the AC load and/or the AC grid from the one or more energy storage device by way of the switches provided that, during use, when one of the switches between the first three-phase power converter and the second or third power bus is open the other is closed, and when one of the switches between the second three-phase power converter and the second or third power bus is open the other is closed, whereby power is capable of being delivered from the one or more PV modules through the second power bus to the AC load and/or the AC grid, and/or power is capable of being delivered from the one or more energy storage device through the third power bus to the AC load and/or the AC grid to supplement or replace power from the one or more PV modules. - View Dependent Claims (9, 10, 11)
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Specification