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1. 发明专利

JPH04120601A CONTROLLING SYSTEM FOR MULTIPLEX CONTROLLER 失效
公开(公告)号：JPH04120601A
公开(公告)日：1992-04-21
申请号：JP24164390
申请日：1990-09-12
申请人： HITACHI LTD
发明人： TANI YUKIZUMI , IWAMIYA KENJI , MIURA YOICHIRO , YANAGIDA SADAO , IIJIMA TADAHIKO , ADACHI SHIGEKI
IPC分类号： G05B9/03
摘要： PURPOSE:To multiplex common process input-output processors so as to improve the reliability of a multiplex controller controlling system when the controlling system is operated for purposes other than the normal loaded operation by inputting/outputting common process signals after switching the controller used for the input-output of the signals to one controller selected out of multiplex controllers. CONSTITUTION:The inputting/outputting process of common process input-output signal is made by means of one controller selected out of triplex controllers (1-1)-(1-3) and, at the same time, a switching circuit 23 is provided so that the common process input-output signals can be inputted/outputted by switching the controller to one of the controllers (1-1)-(1-3). Accordingly, when one of the controllers (1-1)-(1-3) becomes faulty, the input-output of the common process input-output signals can be performed through another normal controller. Therefore, multiplex common process input-output processors are substantially realized and the reliability of this multiplex controller controlling system is improved when the controlling system is used for purposes other than the normal loaded operation, such as actuation control, etc.

2. 发明专利

JPH04270821A COMBUSTION DEVICE AND ITS CONTROLLING 失效
公开(公告)号：JPH04270821A
公开(公告)日：1992-09-28
申请号：JP3065591
申请日：1991-02-26
申请人： HITACHI LTD
发明人： URUSHIYA HARUO , TAKIHANA SEISAKU , KUMADA KAZUHIKO , SHIMURA AKIRA , ARAI OSAMU , IWAMIYA KENJI , IKEDA HIROSHI
IPC分类号： F02C9/16 , F02C9/34 , F02C9/40 , F23C99/00 , F23R3/26 , F23R3/30
摘要： PURPOSE:To provide a combustion device and a control method for the combustion device in which a blowing-off of flame of a premixing combustion device under a variation of a heating calorie of fuel and an increasing of concentration of NOx as well as back-fire is prevented. CONSTITUTION:An amount of supplying air for a premixing combustion device is controlled in response to a calorie of fuel supplied to a combustion device in such a way as the premixing combustion device shows a low NOx within a stable combustion range. A variation in output of the combustion device as an amount of air is controlled is accommodated by controlling an amount of supplying fuel of a dispersion type combustion device. According to the present invention, it is possible to prevent a blowing-off of flame at the premixing combustion device caused by variation in a fuel heating calorie and to prevent an increasing of concentration of NOx as well as back-fire.

3. 发明专利

JPH04179835A FUEL GAS PRESSURE CONTROL METHOD 失效
公开(公告)号：JPH04179835A
公开(公告)日：1992-06-26
申请号：JP30687490
申请日：1990-11-13
申请人： HITACHI LTD , CHUGOKU ELECTRIC POWER
发明人： YAMAGUCHI KAZUTAKA , IWAMIYA KENJI , SHIROMARU ISAO , TORIIE CHIKAMASA
IPC分类号： F02C9/00 , F01K23/10 , F02C9/28 , F02C9/40
摘要： PURPOSE:To restore the fuel gas pressure to a normal level without stopping the operation of a gas turbine or releasing to the atmosphere from a vent stack, by increasing or decreasing the fuel consumption of each gas turbine until the deviation in gas pressure between the fuel and a reference is zeroed. CONSTITUTION:A load control apparatus for combined power generation facilities composed of 12 units is constituted by a unit load control means 17 for controlling the loads of individual power generation facilities Nos. 1 to 6, and a successive load control apparatus for making general control of the loads of the unit power generation facilities. A fuel gas pressure deviation signal 36 representing the deviation between a fuel gas pressure and a reference gas pressure is equally distributed with respect to each of the unit load control means 17. And the fuel gas pressure is determined, while being adjusted, by increasing or decreasing the gas turbine fuel consumption quantity until the deviation is zeroed. This enables restoring the fuel gas pressure to a normal level without stopping the turbine operation, or causing air release to the atmosphere from the vent stack.

4. 发明专利

JPS5549702A TRIP RELIABILITY IMPROVING SYSTEM 失效
公开(公告)号：JPS5549702A
公开(公告)日：1980-04-10
申请号：JP12255678
申请日：1978-10-06
申请人： HITACHI LTD
发明人： IWAMIYA KENJI
IPC分类号： G05B9/02 , G05D3/00
摘要： PURPOSE:To stop a controlled object rapidly and safely at an emergency stop time by inputting a trip condition to the input side or the output side of a servo drive operation circuit. CONSTITUTION:The flow quantity of fuel supplied from fuel pipe 1 is controlled by fuel valve 3, and output signals from servo drive circuit 4, which determines opening of fuel servo valve 3, and control command signals from preceding-stage control system 5 are detected by flow quantity detector 6 and are operated and determined by flow quantity signals which are converted to operation signals by flow quantity signal converter 7. At a normal operation time, servo drive signals are determined by control command signals; however, in case that emergency stop conditions are satisfied, the bias from prescribed power source 9 is inputted to the addition point of servo drive circuit 4 through trip condition 8, thereby closing fuel servo valve 3.

5. 发明专利

JPS55114859A GAS TURBINE FUEL CONTROLLER 失效
公开(公告)号：JPS55114859A
公开(公告)日：1980-09-04
申请号：JP2288579
申请日：1979-02-26
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： UEMATSU MASAYUKI , SAITOU TADAYOSHI , IWAMIYA KENJI
IPC分类号： F02C9/36 , F02C9/32
摘要： PURPOSE:To properly maintain controls of fuel flow rate in spite of the number of rotation in a gas turbine by providing a means of compensating gains of a regulator to regulate opening degree of a bypass valve juxtaposed to a fuel pump in inverse proportion to the number of rotation in the gas turbine. CONSTITUTION:A fuel controller controls opening degree SBV of a bypass valve 3 by a proportional integral controller 2 so that fuel flow rate signal GL from a fuel flow rate detector 5 can correspond to fuel flow rate demand signal GD from a gas turbine controller 1. Here, additional installation includes a turbine velocity detector 7, and a subtractor 6 to subtract fuel flow rate deviating signal DELTAG from output of this detector 7. And opening degree of the bypass valve 3 is controlled by output of the controller 2 in response to output of the subtractor 6. By doing so, gains of opening degree control in a split valve 3 compensate DELTAG which is input of the controller 2 so as to be inversely proportional to the number of rotation in the turbine, to constantly stabilize loop gains.

6. 发明专利

JPS55114854A GAS TURBINE SPEED*LOAD CONTROLLING SYSTEM 失效
公开(公告)号：JPS55114854A
公开(公告)日：1980-09-04
申请号：JP2085779
申请日：1979-02-26
申请人： HITACHI LTD
发明人： SAITOU TADAYOSHI , IWAMIYA KENJI , TSUJI YUKIROU
IPC分类号： F02C9/28 , F02C9/00
摘要： PURPOSE:To control fuel flow rate at non-load rated speed level precedently by detecting load interrupting state from the fact that power generator output signals have arrived at less than the first load level, and load demand signals are at more than the first load level. CONSTITUTION:In a gas turbine 10 to perform governor-free drive, a fuel feeder 9 is controlled in response to fluctuations of load demand signal LD by a load setter 1 and system frequency, fuel flow rate is controlled. In this case, a comparator 13 is provided for giving output for ''1'' as signal LD is at more than the first load level, and a comparator 14 is provided for giving output for ''1'' as power generator output in the turbine 10 is at more than the first load level. And additional installation includes an AND circuit 15 for making load interrupting condition signal S3 into ''1'' as outputs S1, S2 in these comparators are at ''1'', converters 16-18 for setting to ''0'' as the signal S3 is at ''1'', and a delay compensator 9 to compensate response delay to turbine output for fuel flow rate demand signal GD.

7. 发明专利

JPS55114851A GAS TURBINE START CONTROLLING SYSTEM 失效
公开(公告)号：JPS55114851A
公开(公告)日：1980-09-04
申请号：JP2085879
申请日：1979-02-26
申请人： HITACHI LTD
发明人： SAITOU TADAYOSHI , IWAMIYA KENJI , TSUJI YUKIROU , MATSUMOTO HIROSHI , SATOU YOSHIO
IPC分类号： F02C7/26 , F02C7/266 , F02C9/00 , F02C9/48
摘要： PURPOSE:To minimize thermal strain and thermal stress at the time of ignition by determining ignition timing so that combustion gas temperature at the time of ignition may be controlled from atmospheric pressure, temperature, compressor discharged air pressure, temperature, compressor rotation number within an allowable value. CONSTITUTION:When starting up a gas turbine plant 100, to begin with, with a starting power motor 6 started up, a turbine 7 and a compressor 1 are turned, ignition timing is discriminated by a digital computerized controller 200, ignition is made by driving an igniter 23. Here, said controller 200 is constituted by detectors 31-34 for atmospheric pressure, atmospheric temperature, compressor discharged air temperature, compressor discharged air pressure, an input processing function 42 to input output signals of a flame detector 35 in a combustor 4 and a rotation number detector 36 in the compressor 1, a determining function 43 to determine ignition timing so that combustion gas temperature at the time of ignition may be controlled within an allowable value with use of various data, and an output processing function 44.

8. 发明专利

JPH0552125A GAS TURBINE EQUIPMENT AND OPERATING METHOD THEREOF 失效
公开(公告)号：JPH0552125A
公开(公告)日：1993-03-02
申请号：JP21236791
申请日：1991-08-23
申请人： HITACHI LTD
发明人： IWATA NAOHIKO , OTAWARA YASUHIKO , SHIMURA AKIRA , IIZUKA NOBUYUKI , SATO ISAO , HIROSE FUMIYUKI , TAKABA MINORU , KOMATSU YASUTAKA , IKEDA HIROSHI , IWAMIYA KENJI , ISHIDA TAKESHI
IPC分类号： F02C9/16 , F02C7/228 , F02C9/00 , F02C9/28 , F23C99/00 , F23R3/12 , F23R3/26 , F23R3/28
摘要： PURPOSE:To contrive stable operation and lowness of NOx in a combustor by supplying fuel and combustion air, which generate proper air-fuel ratio, relating to each combustor. CONSTITUTION:A plurality of combustors 3, 3,... are provided relating to a single set of gas turbine 2, in a gas turbine equipment. In this gas turbine equipment, an IFC control device 42 for calculating a flow amount of combustion air supplied to a plurality of the combustors 3, 3,... in each combustor 3 and flow regulating means 17, 28 for adjusting the flow amount of combustion air in each combustor 3 in accordance with a command from the IFC control device 42 are provided.

9. 发明专利

JPH04228839A SERVO VALVE CONTROL DEVICE AND ITS CONTROL METHOD 失效
公开(公告)号：JPH04228839A
公开(公告)日：1992-08-18
申请号：JP11989291
申请日：1991-05-24
申请人： HITACHI LTD
发明人： TANI YUKISUMI , YANAGIDA SADAO , IWAMIYA KENJI , KAWAI TAKUMI , IIJIMA TADAHIKO
IPC分类号： F01D21/14 , F01K13/02 , F02C9/00 , F02C9/28 , G05B9/03
摘要： PURPOSE:To provide a device and its control method to control a servo valve in a normal manner even when two or more control systems among the triplex control systems are in an abnormal condition. CONSTITUTION:The device consists of a means to identify any abnormalities of the respective components, an output separating means of a servo amplifier, a means to make an arbitrary combination of the respective components and a corrective means of the servo amplifier. Even when two control systems among the triplex control systems are in an abnormal condition, three coil servos are driven by making combination of normal components, correction of the servo amplifier, and separation of the servo amplifier output so long as at least one component is in a normal condition. This constitution enables successive operation without disturbance of the plant by making combination of normal components or separation of the servo amplifier output when the servo amplifier is in an abnormal condition.

10. 发明专利

JPS61258929A FUEL CONTROLLER FOR GAS TURBINE 失效
公开(公告)号：JPS61258929A
公开(公告)日：1986-11-17
申请号：JP9898885
申请日：1985-05-10
申请人： HITACHI LTD
发明人： ADACHI SHIGEKI , IWAMIYA KENJI , NISHIJIMA YASUMASA , WADA KATSUO
IPC分类号： F02C9/28
摘要： PURPOSE:To restrain a load variation from occurring, by installing a fuel pressure regulating valve and a fuel flow control valve each in each branch pipe line, in case of a two-stage combustion system combining both premix and diffuse combustion systems in one. CONSTITUTION:Both first and second branch pipe lines 20 and 30 branched off from a basic fuel pipe line 10 each are set up in both first- and second-stage combustion chambers formed in a head part of a fueler 2 and at the afterflow side. In the first branch pipe line 20, there are provided with a first orifice 101, a first pressure regulating valve 103 and a first flow control valve 104. In the second branch pipe line 30, there are provided with a second orifice 106, a second pressure regulating valve 108 and a second flow control valve 109. With this constitution, a variation in fuel feed after selection from diffuse combustion to premix combustion is prevented from occurring, thus a load variation is restrainable.

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