Patent ID: 8601804

Claim:
A power generating apparatus of renewable energy type which generates power from a renewable energy source, comprising: a rotating shaft which is driven by the renewable energy source; a hydraulic pump which is driven by the rotating shaft; a hydraulic motor which is driven by operating oil supplied from the hydraulic pump; a generator which is coupled to the hydraulic motor; an oil line which is connected to the hydraulic pump and the hydraulic motor and which circulates the operating oil between the hydraulic pump and the hydraulic motor; an oil cooler which is connected to the oil line and which cools the operating oil by heat exchange with a cooling medium; a cooling-medium line which supplies the cooling medium to the oil cooler; a bypass line which diverges from at least one of the oil line and the cooling-medium line and merges into said at least one of the oil line and the cooling-medium line to bypass the oil cooler; and a flow regulating valve which is provided in said at least one of the oil line and the cooling-medium line that is arranged between a diverging point and a merging point of the bypass line and which regulates a flow rate of at least one of the operating oil and the cooling medium flowing into the oil cooler.