Renewable energy power generation systems
First Claim
1. A modular adjustable power factor renewable energy inverter system, the system comprising:
- a plurality of inverter modules, each inverter module having a dc power input and an ac power output, each inverter module further comprising at least one reactive element switchable to be connected to the ac power output of the inverter module;
a common grid power feed coupled to the ac power outputs of the plurality of inverter modules; and
a power factor controller for controlling a dissipation power factor of said inverter system, wherein said power factor controller is configured to;
monitor the ac power provided to said common grid power feed by each of the inverter modules to determine a total ac power provided to said common grid power feed by said plurality of inverter modules;
determine a number of said inverter modules to control, dependent on a proportion of a maximum power output of said inverter system represented by said total ac power provided to said common grid power feed; and
control said determined number of inverter modules to switch said reactive element into respective said ac power output to control a displacement power factor of said inverter system.
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Accused Products
Abstract
We describe a modular adjustable power factor renewable energy inverter system. The system comprises a plurality of inverter modules having a switched capacitor across its ac power output, a power measurement system coupled to a communication interface, and a power factor controller to control switching of the capacitor. A system controller receives power data from each inverter module, sums the net level of ac power from each inverter, determines a number of said capacitors to switch based on the sum, and sends control data to an appropriate number of the inverter modules to switch the determined number of capacitors into/out of said parallel connection across their respective ac power outputs.
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Citations
17 Claims
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1. A modular adjustable power factor renewable energy inverter system, the system comprising:
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a plurality of inverter modules, each inverter module having a dc power input and an ac power output, each inverter module further comprising at least one reactive element switchable to be connected to the ac power output of the inverter module; a common grid power feed coupled to the ac power outputs of the plurality of inverter modules; and a power factor controller for controlling a dissipation power factor of said inverter system, wherein said power factor controller is configured to; monitor the ac power provided to said common grid power feed by each of the inverter modules to determine a total ac power provided to said common grid power feed by said plurality of inverter modules; determine a number of said inverter modules to control, dependent on a proportion of a maximum power output of said inverter system represented by said total ac power provided to said common grid power feed; and control said determined number of inverter modules to switch said reactive element into respective said ac power output to control a displacement power factor of said inverter system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification