Patent ID: 8502402

Claim:
A power generating apparatus of renewable energy type comprising: a rotation shaft which is rotated with a blade by renewable energy; a hydraulic pump which is driven by the rotation shaft to increase a pressure of operating oil; a hydraulic motor which is driven by the operating oil having been pressurized by the hydraulic pump; a generator which is coupled to the hydraulic motor; a pitch drive mechanism which adjusts a pitch angle of the blade; a monitor unit which obtains a state value indicating an operation state of the power generating apparatus of renewable energy type; and a stop control unit which stops the power generating apparatus of renewable energy type when a fault event occurs, wherein, when a deviation of the state value obtained by the monitor unit from a normal value which is a state value during a normal operation is not less than a first threshold value, the stop control unit performs by means of a hard-wired circuit at least one of: switching the hydraulic pump to an idle state; switching the hydraulic motor to an idle state; and switching the pitch angle toward a feathering position using the pitch drive mechanism, and wherein, when the deviation is less than the first threshold and not less than a second threshold which is closer to the normal value than the first threshold, the stop control unit performs by software control all of: switching the hydraulic pump to the idle state; switching the hydraulic motor to the idle state; and switching the pitch angle toward the feathering position using the pitch drive mechanism.