| 摘要 |
PURPOSE:To prevent fuel from being thrown in excess into a gas turbine by switching, when load is varied in the captioned generating set, a real load signal to a signal yielded by multiplying a speed set signal by a gain for a rate of adjustment as a feedback signal. CONSTITUTION:In the captioned load control device werein a generating set is driven with te aid of a gas turbine and exhaust gas of the gas turbine, provided load varies as in an increase of the load just after engine starting, a switching unit 30 in a load control device 11 is switched to the side of an arithmetic unit 29, while an initializer unit 28 is switched on for a short period of time. An output from the arithmetic unit serving to evaluate load by multiplying an output from a speed set value 25 by a gain K for a rate of adjustment is fed back to a substractor 24, while an output from an integrator 23 is substituted by the output from the arithmetic unit 29.Hereby, a diference betwen outputs from the subtractor 24 and an intial stage of switching by the switching unit 390 is made zero, whereby bumpless switching is made possible. Thereafter, with the initializer unit 28 being turned off, a value imputted into the subtractor 24 is gradually increased at a limited rate of change. |
