Excitation control circuit and electrically excited wind power system having the same

摘要

The present invention provides an excitation control circuit and the electrically excited wind power system having the same. The excitation control circuit includes a plurality of full-power converters, each of which has a generator-side converter and a grid-side converter; a DC excitation module including a plurality of DC-DC converters; and a control module, controlling or switching any DC-DC converter working normally, and controlling excitation switch turning ON or turning OFF.

主权项

1. An excitation control circuit used in an electrically excited wind power system, the excitation control circuit comprising:
a plurality of full-power converters, each of the full-power converters comprising:
a generator-side converter having an AC side and a DC side, wherein the AC side of the generator-side converter is electrically connected to a wind power generator, and the DC side of the generator-side converter is connected to a bus capacitance in parallel; anda grid-side converter having an AC side and a DC side, wherein the AC side of the grid-side converter is electrically connected to an AC power grid, and the DC side of the grid-side converter is connected to the bus capacitance in parallel; a DC excitation module comprising a plurality of DC-DC converters, wherein an input interface of each of the DC-DC converters electrically connected to the bus capacitance of a corresponding full-power converter, an output interface of each of the DC-DC converters is connected in parallel and is electrically connected to an excitation device, and an excitation current required by the wind power generator during excitation is provided by the excitation device; and a control module used for controlling or switching any one of the DC-DC converters to work normally.