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1. 发明专利

JPH0551921B2 失效
公开(公告)号：JPH0551921B2
公开(公告)日：1993-08-04
申请号：JP9626683
申请日：1983-05-31
申请人： MITSUBISHI HEAVY IND LTD , MITSUBISHI ELECTRIC CORP
发明人： SAKINO ETSUJI , HIRATA DAISAKU , TATSUMI KAZUMA , FURUKUBO JUJI
IPC分类号： G05B9/03 , G05B7/02

2. 发明专利

JPS59221702A DIGITAL CONTROLLER 失效
公开(公告)号：JPS59221702A
公开(公告)日：1984-12-13
申请号：JP9626683
申请日：1983-05-31
申请人： MITSUBISHI HEAVY IND LTD , MITSUBISHI ELECTRIC CORP
发明人： KINO ETSUJI , HIRATA DAISAKU , TATSUMI KAZUMA , FURUKUBO YUUJI
IPC分类号： G05B9/03 , G05B7/02
摘要： PURPOSE:To shorten both the transfer time and the control arithmetic cycle with a digital controller by transferring the past value only with the past value data on a desired arithmetic circuit. CONSTITUTION:A CPU which is under control transfers only the analog and logical intermediate values which require the prescribed past value to a CPU under waiting together with the process control with a process controller containing multiple CPUs. The waiting CPU starts an intermediate value CLA reception task 22 and stores the intermediate value data to a buffer area 25. The waiting CPU performs the arithmetic processing with the control task and then the reception data fetching processing. Then the output value of an integration circuit, etc. is refreshed to the data received from the CPU under control. Thus the next control arithmetic processing is carried out with the refreshed control data value. If the control cycle is sufficiently smaller than the time constant, the approximately equal arithmeric data value is obtained between the control and waiting modes. Thus the bumpless switching is possible for a digital controller.

3. 发明专利

JPH0478881B2 失效
公开(公告)号：JPH0478881B2
公开(公告)日：1992-12-14
申请号：JP6122784
申请日：1984-03-30
申请人： MITSUBISHI HEAVY IND LTD
发明人： HIRATA DAISAKU , ISHIGURO MASAAKI
IPC分类号： F22B1/18 , F22B35/00 , G05B7/02 , G05D16/00

4. 发明专利

JPH04318201A OUTPUT CONTROLLER FOR STEAM TURBINE 失效
公开(公告)号：JPH04318201A
公开(公告)日：1992-11-09
申请号：JP8689391
申请日：1991-04-18
申请人： MITSUBISHI HEAVY IND LTD
发明人： HIROE TAKAHARU , HIRATA DAISAKU
IPC分类号： F01D17/22
摘要： PURPOSE:To carry out good control of turbine output over a wide output range without changing the setting of a coefficient multiplier necessary to generate a state feedback signal. CONSTITUTION:In an output controller 38 which generates a governor opening command signal 25 for controlling the opening of a governor 36 by adding a state feedback signal 44 generated by a state feedback means 39 and an integrating feedback signal 14 generated by an integrating feedback means 2, there is provided a steam flow estimating means 40 which calculates steam flow based on an A valve opening signal 17, a B valve opening signal 18 and a steam pressure signal 41, and a steam flow estimating means 42 outputted from the steam flow estimating means 40 is used for the generation of the state feedback signal 44 in the state feedback means 39.

5. 发明专利

JPS61215408A STEAM TURBINE CONTROLLING EQUIPMENT 失效
公开(公告)号：JPS61215408A
公开(公告)日：1986-09-25
申请号：JP5653985
申请日：1985-03-20
申请人： MITSUBISHI HEAVY IND LTD
发明人： KAMIDATE FUMIO , HIRATA DAISAKU , ISHIGURO MASAAKI
IPC分类号： F01K23/10
摘要： PURPOSE:To restrict a sudden steam pressure drop, in a steam turbine driven by the steam generated by means of waste heat from a gas turbine, by closing a steam control valve related to the said steam turbine, according to the amount of the pressure drop, when the front steam pressure of the valve drops. CONSTITUTION:When the operation of either one of steam generators 3a-3c in a combined plant is suspended and when the amount of steam supplied to a steam turbine 8 decreases, the value of a steam pressure measured with a measuring instrument 21, which detects the front steam pressure of a steam control valve 7, also decreases. Then, the output from a subtracter 22, which calculates a difference between said measured value and the value, whose rate of change was restricted to a predetermined value by a rate-of change-limiter 23, turns from zero to a positive signal, while a negative signal is output from the first function generator 24 when the input from the subtracter 22 exceeds the predetermined value. Next, the negative signal, which becomes smaller in accordance with both reduced amount in input and reduced speed, is output from a proportional differential controller 29. According to this negative signal, the steam control valve 7 is closed.

6. 发明专利

JPS60207802A CONTROLLER FOR STEAM PRESSURE 失效
公开(公告)号：JPS60207802A
公开(公告)日：1985-10-19
申请号：JP6122784
申请日：1984-03-30
申请人： MITSUBISHI HEAVY IND LTD
发明人： HIRATA DAISAKU , ISHIGURO MASAAKI
IPC分类号： F22B1/18 , F22B35/00 , G05B7/02 , G05D16/00

7. 发明专利

JPH01106905A GLAND STEAM PRESSURE CONTROL DEVICE FOR STEAM TURBINE 失效
公开(公告)号：JPH01106905A
公开(公告)日：1989-04-24
申请号：JP26257787
申请日：1987-10-20
申请人： MITSUBISHI HEAVY IND LTD
发明人： TAKADA SHUHO , MIYAZAKI YOSHITAKA , HIRATA DAISAKU
IPC分类号： F01D11/06
摘要： PURPOSE:To prevent a rapid increase of a header pressure, by a method wherein integration control is effected while the pressure of a gland steam header is below a set value. CONSTITUTION:The pressure of a gland steam header 8 is detected by a detector 70, and is compared with a set value and computed by a substracter 72. While the pressure is below the set value, integration control is effected by a proportional integration controller 730, and after it is increased to a set value, proportional integration control is made. Operation of a header pressure control valve 6 is controlled by means of an output from the controller 730. Since, with the increase of a pressure to a set value, the opening of a control valve is decreased., this constitution enables prevention of a rapid increase of a header pressure.

8. 发明专利

JPS6242204A DETECTOR FOR ABNORMALITY OF PLANT 失效
公开(公告)号：JPS6242204A
公开(公告)日：1987-02-24
申请号：JP18275385
申请日：1985-08-20
申请人： MITSUBISHI HEAVY IND LTD
发明人： MIYATA TERUO , IDE MIKIO , HORI HIDENORI , HIRATA DAISAKU
IPC分类号： G05B9/02 , G05B23/02
摘要： PURPOSE:To detect a malfunction caused by a shift of the set point for decision of the plant abnormality by checking whether the decision of abnormality is correct or not based on the product of the process quantity obtained at a time point when the plant abnormality is decided and the output of a data table. CONSTITUTION:The plant abnormality deciding signal C changes to 1 from 0 at a point x0 where the process quantity eP changes by the plant abnormality and crosses the set value eS. While the A/D converted value DP changes as shown by a dotted line in response to the quantity eP. The output DL of a latch 56 is latched by the value DP at an instant when the signal C is changed to 1 from 0. A data table 57 contains a flag S showing whether or not the quantity eP exceeds the allowable range of the plant abnormality deciding reference values eS with the digital value DL (process quantity eP) defined as an index and the physical quantity Dd corresponding to the quantity eP in the form of the output data. Thus a flag S=0 is satisfied at action points x0, x1 and x3 respectively. Then the deciding result SF=0 is satisfied with an AND element 59 and therefore the normal action of the signal C can be confirmed. While S=1 and FS=1 are satisfied at action points x2 and x4 respectively and a malfunction of the signal C is confirmed.

9. 发明专利

JPS6189910A Steam turbine start-up circuit 失效
标题翻译：蒸汽涡轮启动电路
公开(公告)号：JPS6189910A
公开(公告)日：1986-05-08
申请号：JP21126484
申请日：1984-10-11
申请人： Mitsubishi Heavy Ind Ltd
发明人： HIRATA DAISAKU , NAGANO OSAMU , MIZUOCHI KIYOSHI , MIYATA TERUO
IPC分类号： F01D19/00 , F01D17/14
CPC分类号： F01D17/145
摘要： PURPOSE:To improve the follow-up performance at a time of a speed up operation by allowing a regulating valve to be kept open before the number of revolution reaches a value within the stated range of deviation at the early stage of a start-up operation of a steam turbine so that a PI blind controller is shifted to a control mode after the PI blind controller is permitted to track an actual valve opening. CONSTITUTION:A deviation signal C between the set number of revolution NR and an actual number of revolution N is inputted into a PI blind controller 13 allowing the control signal to be transmitted to a regulator valve drive device through a signal selector 27. A signal selector 26 determines the initial opening LGVI of a steam regulating valve as a function of steam pressure PL or PH in such a manner that the output from a function generator 23 is selected when low steam pressure PL exceeds the reference value PLT, and the output from a function generator 24 is selected when PL is lower than PLT. On start-up command St being inputted, a flip-flop 30 is set up, the PI blind controller 13 is in a tracking mode allowing a discriminator 28 to be initiated when both speed up and deviation in the number of revolution and become smaller. Subsequently, this allows the flip-flop 30 to be reset permitting the PI blind controller 13 to be shifted to a control mode.
摘要翻译：目的：通过允许调节阀在启动操作的早期阶段达到规定的偏差范围内的值之前使调节阀保持开启，以提高加速操作时的后续性能的蒸汽轮机，使得PI盲控制器在允许PI盲控制器跟踪实际阀开度之后转移到控制模式。构成：设定的转数NR与实际的转数N之间的偏差信号C被输入到PI盲控制器13中，允许控制信号通过信号选择器27传送到调节阀驱动装置。信号选择器 26以如下方式确定蒸汽调节阀的初始开口LGVI作为蒸汽压力PL或PH的函数，使得当低蒸汽压力PL超过参考值PLT时，功能发生器23的输出被选择，并且来自当PL低于PLT时，选择函数发生器24。在输入启动命令St的情况下，设置触发器30，PI盲控制器13处于跟踪模式，允许鉴别器28在转速加速和转数偏差变小时启动。随后，这允许触发器30复位，允许PI盲控制器13转移到控制模式。

10. 发明专利

JPS60173601A DIGITAL CONTROLLER 失效
公开(公告)号：JPS60173601A
公开(公告)日：1985-09-07
申请号：JP18610683
申请日：1983-10-05
申请人： MITSUBISHI HEAVY IND LTD
发明人： KINO ETSUJI , HIRATA DAISAKU , FURUKUBO YUUJI , TATSUMI KAZUMA
IPC分类号： G05B9/03 , G06F11/20 , G06F15/16 , G06F15/177
摘要： PURPOSE:To prevent rapid change of a control variable of process control by checking the difference between a control output value from a CPU of a main system and a control output operating value of a CPU of a standby system and inhibiting changeover between the CPUs when a difference exists. CONSTITUTION:A CPU3 or 4 of the main system controls a process 2 and a control data is transferred to the CPUs 3, 4 of the standby system via a computer coupler 9. The control operation of the CPU3 or 4 of the standby system is performed based on the input value of a process input/output unit and the control data from the CPU3 or 4 of the main system. In this case, a control output comparison program is executed by the CPU3 or 4 only of the standby system, and an output value of the process input/output unit from the CPU3 or 4 of the main system read via an I/O bus 6 and the control output operating value of the CPU3 or 4 of the standby system are checked for the difference, and when a difference exists, the backup of the CPU3 or 4 of the standby system is inhibited.

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