Power generating apparatus of renewable energy type and control method thereof

Abstract

A power generating apparatus of renewable energy type includes a rotation shaft, a hydraulic pump, a hydraulic motor, a generator and a pitch drive unit. When a fault even occurs, a deviation of a state indicating an operation state from a normal state value is calculated. When the deviation 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, the hydraulic motor to an idle state, and the pitch angle toward a feathering position. When the deviation is less than the first threshold and not less than a second threshold, the stop control unit performs by software control all of switching the hydraulic pump to the idle state, the hydraulic motor to the idle state, and the pitch angle toward the feathering position.