Regulating means for gas turbine plant

摘要

Apparatus for controlling the flow of fuel supplied via a regulating valve to a gas turbine plant having a compressed-gas generating unit and a power turbine which is driven by the gas from the generating unit. The function of the controlling apparatus is to reduce or cut off the supply of fuel in the event of an overspeed condition of the power turbine. The apparatus includes a first means which is responsive to the angular velocity of a rotor in the power turbine, and a second means which is responsive to the angular acceleration of such rotor. The control means is jointly responsive to the output signals provided by the first and second means so as to control the valve and reduce the rotor's angular velocity when the output signals provided by both the first and second means concurrently exceed predetermined values. According to a further embodiment, a fourth means is also provided which is responsive to the power of the compressed gas generating unit, and the control means is additionally responsive to the output signal provided by such fourth means.