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A power electrical system is disclosed for a microturbine power generator. The invention permits the microturbine to be started using an external DC power source. The DC voltage is converted to a variable DC voltage by means of a bi-directional buck-boost circuit, DC bus and a DC-to-AC converter. Th

A power electrical system is disclosed for a microturbine power generator. The invention permits the microturbine to be started using an external DC power source. The DC voltage is converted to a variable DC voltage by means of a bi-directional buck-boost circuit, DC bus and a DC-to-AC converter. The DC-to-AC converter produces at its output a fixed voltage pattern whose frequency is gradually increased in concert with the DC voltage, to accelerate the microturbine from standstill to startup speed. Once the microturbine is started, the excitation is discontinued, and the DC bus and DC-to-AC are used to produce output AC power at a voltage level and frequency to match an electrical load.

대표청구항 ▼

1. A method for starting a turbine coupled to an electric machine for supplying power to a load through a DC bus the method comprising, during a startup phase: a. gradually increasing a voltage level of the DC bus; b. converting DC power from the DC bus to AC power such that the frequency of the AC

1. A method for starting a turbine coupled to an electric machine for supplying power to a load through a DC bus the method comprising, during a startup phase: a. gradually increasing a voltage level of the DC bus; b. converting DC power from the DC bus to AC power such that the frequency of the AC power increases in proportion to the gradually increasing voltage level of the DC bus; c. applying the AC power to drive electric machine, which machine in turn drives the turbine to a starting speed.