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11. 发明专利

JPS62291476A VARIABLE SPEED TYPE PUMP SYSTEM 失效
公开(公告)号：JPS62291476A
公开(公告)日：1987-12-18
申请号：JP9984986
申请日：1986-04-30
申请人： HITACHI LTD
发明人： KUWABARA HISAO , BANDO AKIRA , HAYASHI SHIGEAKI , YOKOYAMA ISAO , ONO YASUTERU
IPC分类号： F03B15/04
摘要： PURPOSE:To assure a sure pumping start-up by computing an optimum rotation speed command and an optimum guide vane opening command by preliminarily setting the actual rotation speed at a high level upon start-up, and then by controlling the actual rotation speed to decrease to the optimum rotation speed. CONSTITUTION:When a motor output command POE is given, an optimum rotation speed NOPT is output from an optimum rotation speed function generator 30 according to the command POE and a pump head H. The deflection between the optimum rotation speed NOPT and an actual rotation speed N is then calculated by an adding unit 31. The signal of the deflection is output to a guide vane compensation signal circuit 32. An optimum guide vane opening signal YOPT is output from an opening guide vane opening function generator 33 with the command POE and the pump head H as the inputs. The signal synthesized by the signal YOPT and a guide vane compensation signal DELTAYN are given to a hydraulic servo mechanism 14 from the adding unit 34 to control the opening of the guide vane. The actual rotation speed is controlled such that it is once increased before the actual pumping operation beings and, upon start-up, is converged thereafter on the optimum rotation speed.

12. 发明专利

JPS62282172A VARIABLE SPEED WATER-WHEEL GENERATOR 失效
公开(公告)号：JPS62282172A
公开(公告)日：1987-12-08
申请号：JP10664186
申请日：1986-05-12
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： KUWABARA HISAO , BANDO AKIRA , HARAGUCHI EIJI , NAKAGAWA HIROTO
IPC分类号： F03B15/06 , H02P9/04 , H02P9/42
摘要： PURPOSE:To perform a stable control within an allowable variable speed band by correcting a generator output command signal according to the difference between an optimal rotary speed command and an actual rotary speed command. CONSTITUTION:A water-wheel characteristic function generator 5 produces an optimal rotary speed command Na and an optimal guide valve opening command Ya. The optimal rotary speed command Na is compared with an actual rotary speed signal N to produce a signal C for correcting the generator output command which is fed to a comparator 15. The optimal guide valve opening command Ya is fed to a comparator 15 and compared with an actual generator output signal PG so as to feed a difference P to a power controller 17. Consequently, variable speed control can be performed stably within an allowable variable speed band.

13. 发明专利

JPS62282171A VARIABLE SPEED PUMPING SYSTEM 失效
公开(公告)号：JPS62282171A
公开(公告)日：1987-12-08
申请号：JP9985086
申请日：1986-04-30
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： KUWABARA HISAO , OGIWARA MASASHIGE , BANDO AKIRA , HAYASHI SHIGEAKI , YOKOYAMA ISAO , ONO YASUTERU
IPC分类号： F03B15/04
摘要： PURPOSE:To realize an economic design of a cyclo-converter by automatically modifying an optimal rotary speed command to be determined according to a drive output command then operating at the outside of a forbidden band. CONSTITUTION:A rotary speed deviation signal outputted from an adding section 31 is fed to a guide vane opening correction signal circuit 32 then corrected by a signal fed from an optimal guide vane opening function generator 33 and fed to a hydraulic servo mechanism 14 for operating a guide vane. If there is a possibility that the optimal rotary speed will be within a forbidden band, the driving output is corrected automatically so as to set such that the lower limit of the forbidden band will be the upper limit based upon a rotary speed command. consequently, the forbidden band causes no actual trouble and an economic design of a cyclo-converter can be realized.

14. 发明专利

JPS62282169A VARIABLE SPEED PUMPING EQUIPMENT 失效
公开(公告)号：JPS62282169A
公开(公告)日：1987-12-08
申请号：JP9984486
申请日：1986-04-30
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： SHIOZAKI JUNICHI , KUWABARA HISAO , BANDO AKIRA , ONO KENICHI , SAKAYORI AKIHIRO , HITOMI ICHIRO , MINATO MASAHIRO , HAYASHI SHIGEAKI
IPC分类号： F03B15/04 , F03B15/16 , H02J15/00 , H02P9/42
摘要： PURPOSE:To enable regulation of a motor load by controlling a frequency converter such that an effective power detection level approaches to a command level then correcting an effective power command signal and inputting to a variable speed driver. CONSTITUTION:A frequency converter controller 35 controls the output frequency of a power converter 3 according to an output signal from a position detector 28 while simultaneously controls the power converter 3 according to a signal from a speed controller 6 or a power controller 8. The power controller 8 functions to reduce the difference of an effective power command signal PE01 to zero and a frequency controller 34 produces a correction signal PE01 for the effective power command PE01. Consequently, the motor load can be regulated and the system can be employed in the power system control such as AFC operation.

15. 发明专利

JPS6271497A CONTROLLER FOR VARIABLE-SPEED HYDRAULIC TURBINE GENERATOR 失效
公开(公告)号：JPS6271497A
公开(公告)日：1987-04-02
申请号：JP21000485
申请日：1985-09-25
申请人： KANSAI ELECTRIC POWER CO , HITACHI LTD
发明人： HARAGUCHI EIJI , NAKAGAWA HIROTO , BANDO AKIRA , KUWABARA HISAO , NOHARA GOO , ONO KENICHI
IPC分类号： H02P9/04 , H02H7/06 , H02P9/00
摘要： PURPOSE:To improve the stability of an AC system by directly controlling a generating output in response to a generating output command from the outside. CONSTITUTION:A rotational-speed command arithmetic section 15 outputs an optimum revolution-number command Na in response to an external generating output command P0 and a water-level signal H. A rotational speed controller 16 compares the optimum revolution-number command Na with a rotational speed signal N, and outputs a guide-valve opening command Ya to a guide valve 11 for a hydraulic turbine 2. A frequency controller 3 controls the phase of AC exciting current fed to a secondary winding 1b for a winding type induction motor 1 in response to the external generating output command P0, a slip-phase signal SP and a generating output P. Accordingly, the generating output can be followed up smoothly to the generating output command, thus improving the stability of an AC system.

16. 发明专利

JPS629748B2 失效
公开(公告)号：JPS629748B2
公开(公告)日：1987-03-02
申请号：JP14235478
申请日：1978-11-20
申请人： HITACHI LTD
发明人： KUWABARA HISAO , OKUMURA HIROSHI
IPC分类号： F03B15/04 , F03B3/10

17. 发明专利

JPS6151669B2 失效
公开(公告)号：JPS6151669B2
公开(公告)日：1986-11-10
申请号：JP12377480
申请日：1980-09-05
申请人： HITACHI LTD
发明人： KUWABARA HISAO , TAKIGUCHI KEITARO
IPC分类号： F03B15/18 , F03B15/22

18. 发明专利

JPS6147981B2 失效
公开(公告)号：JPS6147981B2
公开(公告)日：1986-10-22
申请号：JP10744777
申请日：1977-09-07
申请人： HITACHI LTD
发明人： KUWABARA HISAO
IPC分类号： F03B15/04 , F03B15/02

19. 发明专利

JPS61170299A OPERATION CONTROLLER OF VARIABLE SPEED POWER GENERATION SYSTEM 失效
公开(公告)号：JPS61170299A
公开(公告)日：1986-07-31
申请号：JP952585
申请日：1985-01-21
申请人： KANSAI ELECTRIC POWER CO , HITACHI LTD
发明人： HARAGUCHI EIJI , NAKAGAWA HIROTO , NOHARA GOO , GOTO MASUO , KUWABARA HISAO , BANDO AKIRA , ONO KENICHI
IPC分类号： H02P9/04
摘要： PURPOSE:To stably control to a target value at pumping up AFC operation time by controlling a governor valve opening in accordance head and the rotating speed at a pumping operation time. CONSTITUTION:In a variable speed power generation system having an induction generator with secondary excitation, the phase angle of the secondary exciting voltage is controlled by the difference between the command value of the power and the actual value. Further, the actual rotating speed of the generator is detected from a tachometer generator 11, input together with the head to a control instruction unit C, and the opening of a governor valve V is controlled to obtain the maximum efficiency. Thus, since the phase angle control of the secondary exciting voltage and the control of the opening of the governor valve are performed, it can be controlled at a target value stably in an AFC operation.

20. 发明专利

JPS598008A Pid arithmetic type automatic controller 失效
标题翻译： PID算术型自动控制器
公开(公告)号：JPS598008A
公开(公告)日：1984-01-17
申请号：JP11538082
申请日：1982-07-05
申请人： Hitachi Ltd
发明人： KUWABARA HISAO
IPC分类号： G05B11/36 , G05B7/02 , G05B13/00 , G05B13/02
CPC分类号： G05B13/02
摘要： PURPOSE:To ensure both safety and quick responsiveness, by switching automatically to set the responsiveness-priority only in case the specific state quantity of a device to be controlled becomes larger or smaller than the prescribed value. CONSTITUTION:Two integration element I circuits 31 and 32 are provided to increase the gain of the 2nd circuit 32 much more than the gain of the 1st circuit 31. When the revolving speed is higher than the prescribed value, a switch 11 is automatically switched so as to supply a signal X2 although a signal X10 is usually supplied. As a result, the setting is automatically to the responsiveness-priority when the revolving speed exceeds the prescribed value.
摘要翻译：目的：为了确保安全和快速响应，只有在要控制的设备的特定状态量变得大于或小于规定值的情况下，才自动切换以设置响应优先级。构成：提供两个积分元件I电路31和32，以增加第二电路32的增益，远大于第一电路31的增益。当转速高于规定值时，开关11自动切换为了提供信号X2，尽管通常提供信号X10。结果，当转速超过规定值时，该设定自动地成为响应性优先。

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