| 摘要 |
PURPOSE:To aim at stabilization in a gas turbine operation in the case where a heating value of fuel varies to some extent, by adding a heating valve compensating circuit to a stop ratio valve's regulating circuit of a fuel control. CONSTITUTION:A heating value compensating circuit is added to a regulating circuit of a stop ratio valve 1 belonging to a fuel control, while an actual heating valve out of an actual heating value detector 17 is subtracted from a setting value 18, and this subtracted value is squared by a square calculator 20 and, after multiplication with a signal out of a function generator 10 takes place at a multiplier 21, is inputted into a deviation calculator 11. A deviation with a signal out of a pre-pressure detector 8 of a fuel regulating valve is calculated at this deviation calculator 11 whereby the stop ratio valve 1 is regulated. Thus, even if the heating value is changed to some extent, the fuel regulating valve can be kept in an optimum opening range so well, thus a gas turbine is able to operate so stably. |
