Patent ID: 8994214
Filing Date: 2015-03-31
Classification: H02J,H02K,Y02B

Abstract:
1. A generator system configured to provide power to a load source, the generator system comprising: an engine and a generator, wherein the engine is configured to drive the generator to provide a generator alternating current (AC) electrical power output; an energy storage system (ESS) configured to provide an ESS direct current (DC) electrical power output; a first inverter connected to the generator configured to receive the generator AC electrical power output and configured to provide a DC power output; and a second inverter configured to receive the DC power output from the first inverter and the DC electrical power output from the ESS and configured to provide an AC power output; and a connector configured to electrically couple the AC power output from the second inverter to the load source and to an external power grid; wherein the generator system is configured so that a first power mode of the generator system includes: (a) the generator maintaining a first generator power output level corresponding to a first mode specified power requirement of the load source; and (b) the ESS providing an additional first power output level to satisfy the first mode specified power requirement of the load source; wherein the generator system is configured so that a second power mode of the generator system includes the engine and the generator being shut off at a specified generator power output level and/or at a specified RPM of the engine, while the ESS maintains a specified ESS power output level corresponding to a second mode specified power requirement of the load source; wherein the generator system is configured so that, in the first power mode, the DC power output provided by the first inverter is at a voltage that is the same as a voltage of the ESS; wherein the voltage of the DC power output provided by the first inverter and the voltage of the ESS have a value V that is sufficiently high to permit the second inverter receiving voltage V to output a voltage that is equivalent to a grid power supply; and wherein the generator system is configured so that, in the first power mode, the voltage of the DC power output provided by the first inverter is maintained to be at least V volts, independent of a speed of the engine.