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71. 发明专利

JPS5688923A OPERATION CONTROL DEVICE FOR GAS TURBINE GENERATION PLANT WITH WASTE HEAT BOILER 失效
公开(公告)号：JPS5688923A
公开(公告)日：1981-07-18
申请号：JP16413979
申请日：1979-12-19
申请人： HITACHI LTD
发明人： TAKAHASHI MASAE
IPC分类号： F02C6/18 , F02C6/00 , F02C9/00 , F02C9/48
摘要： PURPOSE:To control the thermal stress of a waste heat boiler effectively by constantly monitoring the rate of thermal rise of exhaust gas in the waste heat boiler and controlling the rate of thermal rise of exhaust gas at a fixed level when the rate is risen over a fixed value. CONSTITUTION:The output of a thermocouple 12 to measure the temperature of exhaust gas is connected to a temperature/rate of thermal rise controller 85, whose output is given to an addition point 92a. Besides, a feedback signal is given to the addition point 92a via a feedback resistance 87a and a feedback capacity 88a. The output of a speed detector 13 is connected to an addition point 92b via a pulse/ analogue converter. Besides, the output of a load setting circuit 83, a 100% speed no-load reference value 93, a reference speed 86, and a feedback signal via a droop resistance 89 are respectively connected to the addition point 92b. The output of the minimum value gate 90 is connected to a fuel control valve 9 via an operational amplifier 81c constructing an integrator. Besides, the output of a valve position detector 91 is inputted into an operational amplifier 81e.

72. 发明专利

JPS5595103A AUTOMATIC CONTROLLER 失效
公开(公告)号：JPS5595103A
公开(公告)日：1980-07-19
申请号：JP66879
申请日：1979-01-10
申请人： HITACHI LTD
发明人： TAKAHASHI MASAE , HONDA NAGANOBU
IPC分类号： G05B11/32
摘要： PURPOSE:To prevent a disturbance attended on a shift in control, by starting the output of an arithmetic function of proportional integration of a speed indicator from zero when changing control functions. CONSTITUTION:Differences between speed signals QO and NT given by speed command functions 121 and 125 and actual speed signal NR are calculated to output a speed error signal. Arithmetic with proportional integral control differentiated is carried out by arithmetic functions 131, 133 and 135 of proportional integral control of a speed indicator to extract an output whose initial value is set to zero. Switching function 137 selects one of three arithmetic functions 131, 133 and 135 of proportional integration and integral arithmetic function 139 performs a cascade process to output a valve opening-degree signal obtained by converting. Therefore, a disturbance attended on a change in control function can be prevented between random control functions.

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