Renewable energy power generation systems

摘要

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.

主权项

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; andcontrol 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.