Patent ID: 9584055
Date: 2017-02-28
CPC Classifications: H02J,H02P

Claim:
1. A voltage regulator system for regulating an output voltage of a genset including an engine and a generator, the voltage regulator system comprising: a voltage regulator comprising a plurality of under-frequency roll-off (UFRO) states, each UFRO state configured to implement a UFRO characteristic for reducing terminal voltage in response to a reduction in terminal frequency, and a controller configured to receive an operational signal indicative of an operating condition of the genset for selection of a UFRO state based on the operational signal, wherein a first UFRO state of the plurality of UFRO states is selected when an engine coolant for the engine is in a hot condition and a second UFRO state of the plurality of UFRO states is selected when the engine coolant is in a cold condition.