Patent ID: 7215098
Filing Date: 2007-05-08
Classification: H02J,H02M,H02P,Y02E

Abstract:
1. A micro-turbine generating system comprising: a high frequency high-speed permanent-magnet poly-phase AC electrical generator having a plurality of generator terminals and having a plurality of poly-phase output lines associated with said generator terminals, a gas turbine coupled to said generator for driving said generator at high speeds, and a power conditioning unit connected to said output lines for receiving output voltages at said generator terminals for converting said output voltages into a voltage waveform for output to a load, wherein said generator has an internal inductive reactance producing in use a drop of voltage from no-load to full-load at said generator terminals, and wherein a capacitor arrangement is provided between said generator and said power conditioning unit to form a combined generator and capacitor arrangement having a plurality of output terminals for supplying output voltages to said power conditioning unit, said capacitor arrangement comprises a respective capacitor connected in series in each of said output lines, each said respective capacitor having a value of capacitance selected such that said drop of voltage from no-load to full-load is substantially offset at said output terminals of said combined generator and capacitor arrangement, thereby enabling the power range of operation of said generator to be extended.