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1. 发明专利

JP2002071047A CONTROL DEVICE AND METHOD FOR SERVO VALVE, AND COMPOUND POWER PLANT AND GAS TURBINE PLANT 失效
公开(公告)号：JP2002071047A
公开(公告)日：2002-03-08
申请号：JP2001149227
申请日：2001-05-18
申请人： HITACHI LTD
发明人： ASAKURA KAZUYASU , TAKAHASHI MASAE
IPC分类号： F01D25/00 , F01D17/00 , F01D17/10 , F01D17/24 , F01K23/10 , F16K31/06 , F16K37/00 , G05B9/03
摘要： PROBLEM TO BE SOLVED: To provide a control device and method for servo valves, which allow control for servo valves equipping a plurality of servo coils to be continued stably after coil disconnection in the servo valve. SOLUTION: Voltages of the plurality of servo coils 3A, 3B and 3C are detected with disconnection detect means provided respectively in servo amplifiers 2A, 2B and 2C, so that the servo amplifiers 2A, 2B and 2C perform disconnection detection and disconnection compensation.

2. 发明专利

JP2000303804A COAL GASIFICATION COMPOUND GENERATION PLANT AND OPERATION CONTROL APPARATUS THEREOF 失效
公开(公告)号：JP2000303804A
公开(公告)日：2000-10-31
申请号：JP11651399
申请日：1999-04-23
申请人： HITACHI LTD
发明人： NAGABUCHI NAOYUKI , TAKAHASHI MASAE , ISHIDA TAKESHI , SATO YOSHIO , KISO FUMIHIKO , KATAGIRI YUKINORI , IKEMATSU TAKEHIKO , NAKAMURA HIDEO , SHIMAUCHI KENTA , KIDA ARATA , SUGITA NARIHISA
IPC分类号： F01K23/10 , C10J3/02 , F02C3/28 , F22B1/18
摘要： PROBLEM TO BE SOLVED: To reduce temporal retarding of control, stabilize gas pressure under load fluctuation, and suppress reduction of gas turbine output in a coal gasification compound generation plant. SOLUTION: A gas turbine bypass piping 23, on which a gas turbine bypass valve 24 is interposed, is branched from a refined gas supply pipe line 67 on its upstream side of a pressure adjustment valve 16, through which pipe line 67 for refined gas is supplied from a gas refining arrangement 9 to a burner 3. A refined gas combustion device 25 is connected to the piping 23 for burning the refined gas. The refined gas combustion device 25 is connected to an exhaust heat recovery device 10, which recovers heat from exhaust gas of a gas turbine 4 for generating steam, at its discharging side of the combustion gas for recovering heat. An opening of the gas turbine bypass valve 24 is increased under normal operation, when the gas pressure at an outlet of gasification oven exceeds a set value. In a reverse case, the opening is decreased. The opening is so controlled that a difference is equal to zero between a set value of a steam turbine output and an actual output under load fluctuation.

3. 发明专利

JP2000112502A AUTOMATIC RESTORING CIRCUIT FOR CONTROL SYSTEM 失效
公开(公告)号：JP2000112502A
公开(公告)日：2000-04-21
申请号：JP30160198
申请日：1998-10-08
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： WATANABE KAZUHIKO , KUMAZAKI MASAYUKI , TAKAHASHI MASAE
IPC分类号： G05B11/36 , G05B9/03
摘要： PROBLEM TO BE SOLVED: To reduce an operation load on a driver by automating a restoring operation from manual control to automatic control when the abnormality of deflection largeness is generated between duplex process signals. SOLUTION: When the generation of deflection largeness between duplex process signals 1 and 2 is diagnosed by a monitor relay 5, an FF11a is set and an FF21 is reset according to a deflection largeness signal 18 so that switching to manual control can be automatically attained. Afterwards, when a normal system is selected by a normal system selecting circuit (FF 9a) while the deflection largeness is generated, a normal side process signal is selected by a bumpless switcher 6. Then, this normal side process signal is detected by a switching detecting circuit 18a, and a signal 20a is turned on in a condition that the deflection largeness is generated, and the following operation of abnormality diagnose exclusion 10a and deflection largeness signal reset 11a are automatically executed. At the same time, selection signal switching completion 22 is detected. Then, the FF21 is set according to an automatic restoration command 23 so that the manual control can be automatically switched to automatic control.

4. 发明专利

JPH0932509A SERIAL LOAD CONTROL METHOD AND DEVICE 失效
公开(公告)号：JPH0932509A
公开(公告)日：1997-02-04
申请号：JP18722095
申请日：1995-07-24
申请人： HITACHI LTD
发明人： IIJIMA TAKESHI , TAKAHASHI MASAE
IPC分类号： F01K23/10
摘要： PROBLEM TO BE SOLVED: To stabilize a shaft output command when a combustor is switched, and improve load operability as a combined power generation plant by substantially expanding it to an allowable rate of change set in a change rate restricting unit of the shaft output command in a serial load system. SOLUTION: A difference σ between a serial output command A and output A' of a change rate restricting unit 101 is found by a subtracter 201. Output σof its subtracter 201 is inputted to a function generator 202, and when an absolute value of input is larger than a preset certain specific value, a first value is operated as output α, and when an absolute value of the input is smaller than its specific value, a second value smaller than the first value is operated on the basis of respectively selected functions. Deviation C5 being output of a subtracter 102 and output α of the function generator 202 are inputted to a multiplier 203, and a multipled result α.σ of both inputs is outputted to a proportional integrator 103. Its α.σ is processed by the proportional integrator 103, and a shaft output command D is outputted to a load control circuit.

5. 发明专利

JPH08339204A AUTONOMOUS ADAPTIVE OPTIMIZATION CONTROL SYSTEM FOR THERMAL POWER STATION 失效
公开(公告)号：JPH08339204A
公开(公告)日：1996-12-24
申请号：JP14290795
申请日：1995-06-09
申请人： HITACHI LTD
发明人： MATSUMOTO HIROSHI , OSAWA AKIRA , TAKAHASHI MASAE , AKIYAMA KOSEI
IPC分类号： F01D15/10 , F01K23/10 , F02C9/00 , F22B35/14 , G05B13/02 , G06F15/18 , G06N3/00
摘要： PURPOSE: To automatically produce a starting schedule which can minimize the starting time while satisfying plural operation limit conditions at a time by increasing the adoption ratio of the starting schedule that is acquired by an adaptive knowledge acquisition means. CONSTITUTION: An actual starting schedule is produced from a 1st starting schedule which is produced based on the schedule correction value calculated by a schedule correction value calculation means 600 and a 2nd starting schedule which is produced based on the schedule correction value acquired by an adaptive knowledge acquisition means 800. Then an autonomy management means 200 increases the adoption ratio of the 2nd starting schedule by increasing the autonomous coefficients that prescribe the adoption ratios of the 1st and 2nd starting schedules every time the start is repeated. Therefore, the rate of the 2nd starting schedule is increased and it is possible to produce a more suitable starting schedule in response to the change of the plant operation condition as the plant starting frequency is increased.

6. 发明专利

JPH08303210A AUTONOMOUS ADAPTIVE OPTIMIZING CONTROL SYSTEM FOR THERMAL POWER PLANT 失效
公开(公告)号：JPH08303210A
公开(公告)日：1996-11-19
申请号：JP11283195
申请日：1995-05-11
申请人： HITACHI LTD
发明人： MATSUMOTO HIROSHI , OSAWA AKIRA , TAKAHASHI MASAE , AKIYAMA KOSEI
IPC分类号： F01K13/02 , F22B35/04 , G05B13/02 , G06F15/18 , G06N3/00
摘要： PURPOSE: To carry out monitoring evaluation for an operation restricting factor by providing a schedule execution controlling means which starts and controls a thermal power plant according to a starring schedule formed by an autonomous managing means. CONSTITUTION: In a schedule execution controlling means 300, a process condition accompanying a start of a thermal power plant 3000 is controlled according to a starting schedule made by an autonomous managing means 200. In the autonomous managing means 200, an employed ratio for a schedule, which is made on the basis of a correction amount obtained from a schedule correction amount computing means 600 based on fuzzy inference, and an employed ratio for a schedule, which is made on the basis of a correction amount obtained from an adaptive knowledge acquiring means 800, are variable. As starring is repeated, the latter ratio is increased, so that adaptive ability against a change in an operating condition and an autonomous ability can be increased. In this way, a starring schedule minimizing a starting time can be automatically formed and can be executed.

7. 发明专利

JPH074265A GAS TURBINE COMBUSTION PART CHANGING CONTROL METHOD 失效
公开(公告)号：JPH074265A
公开(公告)日：1995-01-10
申请号：JP14750493
申请日：1993-06-18
申请人： HITACHI LTD , CHUGOKU ELECTRIC POWER
发明人： HIROSE FUMIYUKI , SATO ISAO , SHIMURA AKIRA , HANAOKA HIROSHI , TAKABA MINORU , TAKAHASHI KOJI , TAKAHASHI MASAE , SHIROMARU ISAO , TORIIE CHIKAMASA , YAMAMOTO KIYOMI
IPC分类号： F02C9/28 , F02C9/34
摘要： PURPOSE:To prevent repetition of ignition/extinguishment at each combustion part of a gas turbine having a multi-stage type combustor. CONSTITUTION:To a combustion command computed in accordance with deviation between a gas turbine load command 1 and a gas turbine load signal 2, logics of determining a fuel control changing zone by a changing zone controller 5, prohibiting a signal increase/decrease direction within the fuel control changing zone, determining passage of a re-entry allowing time are provided for avoiding frequency generation of large fuel quantity change at a combustion part. Consumption of a service lift by a rapid temperature change can, therefore, be restricted, with stable combustion maintained, and the lowest load can be reduced. The load command can thus be followed in a wide load range except for partial limit given in the fuel control changing zone if the load command with severe changing frequency is given.

8. 发明专利

JPH0612079B2 失效
公开(公告)号：JPH0612079B2
公开(公告)日：1994-02-16
申请号：JP5071388
申请日：1988-03-04
申请人： HITACHI LTD
发明人： TAKAHASHI MASAE
IPC分类号： F02C9/28

9. 发明专利

JPH0454809B2 失效
公开(公告)号：JPH0454809B2
公开(公告)日：1992-09-01
申请号：JP7609486
申请日：1986-04-02
申请人： HITACHI LTD
发明人： TAKAHASHI MASAE
IPC分类号： F01K23/10

10. 发明专利

JPH0423089B2 失效
公开(公告)号：JPH0423089B2
公开(公告)日：1992-04-21
申请号：JP16383586
申请日：1986-07-14
申请人： HITACHI LTD
发明人： TAKAHASHI MASAE
IPC分类号： F01K23/10

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