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1. 发明专利

JPS6352699A CONTROLLER FOR VARIABLE SPEED GENERATOR-MOTOR 失效
公开(公告)号：JPS6352699A
公开(公告)日：1988-03-05
申请号：JP19369386
申请日：1986-08-19
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： ITO AKIO , SAWA SHUSUKE , SUGISAKA HIROSHI , HAYASHI SHIGEAKI , NAKAGAWA HIROTO , ONO YASUTERU
IPC分类号： H02P9/00 , H02H7/06 , H02J3/00
摘要： PURPOSE:To enhance the stability of a system, by discriminating whether an accident is generated in the AC system or in a power converter, based on the input/output current deviation value of the power converter and a state that excess current is generated or is not generated. CONSTITUTION:On the accident of an AC system, the waveform of a current value IIN obtained via a cyclo-converter input side current detector 22 is almost the same as that of an output side current value IOUT, and so the output I of a comparator 19 is set to be almost zero. At this time, an input current value is equal to or more than an allowable value K2, thereby the output of excess current suppression control command GO2 is generated from an operation continuing discriminator 20, and excess current is suppressed. On the communication failure of a cyclo-converter, the input current is set to be equal or more than the allowable value K2. In the meantime, the output current IOUT=0 is set, thereby the absolute value of the output I of the comparator 19 is set to be equal to or more than an allowable value K1, and from the operation continuing discriminator 20, the output of main machinery emergency stop command ST is generated.

2. 发明专利

JPH01268499A CONTROLLING METHOD FOR OPERATION OF VARIABLE SPEED PUMPING-UP GENERATOR PLANT 失效
公开(公告)号：JPH01268499A
公开(公告)日：1989-10-26
申请号：JP9629888
申请日：1988-04-19
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： NOHARA GOO , GOTO MASUO , HARAGUCHI EIJI , HAYASHI SHIGEAKI
IPC分类号： H02P9/00 , H02P9/04
摘要： PURPOSE:To stably control in high efficiency to a target power by controlling the opening of a governor valve on the basis of an input power value to an induction machine by the correlation between a predetermined input power value to the machine and an efficiency with a head as a parameter. CONSTITUTION:A phase angle calculator 16 calculates the phase angle deltaof an exciting voltage to be applied to the secondary windings 6a-6c of an induction machine in response to a deviation between a power control command P0 and an effective power P. A secondary winding excitation amount setter 17 controls the exciting voltages of the windings 6a-6c on the basis of the number of rotation N and the angle delta. On the other hand, an optimum valve opening calculator 25 outputs a governor valve opening Y to meet a head command H and the power P on the basis of the characteristics of the predetermined power P and the opening Y. A servo system 14 applies an operation amount responsive to the opening Y to a governor valve 12.

3. 发明专利

JPH08254175A VARIABLE SPEED PUMPING-UP DEVICE 失效
公开(公告)号：JPH08254175A
公开(公告)日：1996-10-01
申请号：JP32665495
申请日：1995-12-15
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： SAKAYORI AKIHIRO , KUWABARA HISAO , BANDO AKIRA , ONO YASUTERU , HAYASHI SHIGEAKI
IPC分类号： F03B3/10 , F03B15/16
摘要： PURPOSE: To provide a variable speed pumping-up system capable of regulating an electric motor load even during pumping up operation and coping with control of a power system such as AFC. CONSTITUTION: A variable speed pumping-up device comprises an optimum rotation speed function generator 12 to input a power command P0 and a total head HST from the outside and compute a current optimum rotation speed NOPT a power control correction signal generator 16 to compare an output signal NOPT therefrom and an actual rotation speed N with each other and form a negative feedback circuit, and have at least an integrating element to reduce a deviation therebetween to zero and work to output a correction signal Q and a negative feedback circuit to add the power command P and the correction signal 5 to generate a synthetic signal P0 +ε, and compare it with an actual input PM. Further, the variable speed pumping-up device comprises a power controller 7 having at least an integrating element to reduce the deviation therebetween to zero; and a power converter 3 to perform AC excitation control so that the input P of the electric motor 2 forms the synthetic signal P0 +ε.

4. 发明专利

JPH0542236B2 失效
公开(公告)号：JPH0542236B2
公开(公告)日：1993-06-25
申请号：JP19369386
申请日：1986-08-19
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： ITO AKIO , SAWA SHUSUKE , SUGISAKA HIROSHI , HAYASHI SHIGEAKI , NAKAGAWA HIROTO , OONO YASUTERU
IPC分类号： H02P9/00 , H02H7/06 , H02J3/00

5. 发明专利

JPS62255585A VARIABLE SPEED HYDRAULIC TURBINE GENERATOR 失效
公开(公告)号：JPS62255585A
公开(公告)日：1987-11-07
申请号：JP9984586
申请日：1986-04-30
申请人： HITACHI LTD
发明人： KUWABARA HISAO , BANDO AKIRA , HAYASHI SHIGEAKI , YOKOYAMA ISAO , NAKAGAWA HIROTO
IPC分类号： F03B15/06 , H02P9/04
摘要： PURPOSE:To realize a maximum power generation output range with a cyclo converter of minimum capacity, by slidingly providing operation points avoiding a cycle converter output prohibiting zone in the vicinity of a synchronous speed. CONSTITUTION:A function generator 5 is directly or indirectly supplied with a power generation output command and outputs an optimum rotational speed command and sets a corrected rotational speed command so that the output avoids an output prohibiting zone of a cyclo converter 3. A correction calculator 11 is supplied with a difference between the corrected rotational speed command and a rotational speed sensing value and outputs a correction signal for making the difference to zero. An adder 13 adds the correction value and an optimum guide valve opening command and the correction value is applied to a guide valve drive unit 8 as a corrected guide valve opening command for controlling a guide valve 9. With this arrangement, the capacity of the cyclo converter 3 can be set at the condition that the output prohibiting zone is provided and further a power generation output range is the same as the case wherein the output prohibiting zone is not provided.

6. 发明专利

JPS62255584A VARIABLE SPEED HYDRAULIC TURBINE GENERATOR 失效
公开(公告)号：JPS62255584A
公开(公告)日：1987-11-07
申请号：JP9984386
申请日：1986-04-30
申请人： HITACHI LTD
发明人： KUWABARA HISAO , BANDO AKIRA , ITO AKIO , HAYASHI SHIGEAKI , HARAGUCHI EIJI
IPC分类号： F03B15/06 , H02P9/04
摘要： PURPOSE:To realize a maximum generation output range with a cyclo converter of minimum capacity, by slidingly providing operation points avoiding a cyclo converter output prohibiting zone in the vicinity of a synchronous speed. CONSTITUTION:When a hydraulic turbine characteristic function generator 4 produces an output which enters into the output prohibiting zone of a cyclo converter 3, a history function generator 19 replaces the output with a rotational speed command which turns away the prohibiting zone. Then, a correction calculator 11 produces a correction signal so that an actual rotational speed coincides with the corrected rotational speed command. Further, a prohibiting zone kick back element 20 corrects an opening command of a guide valve 9 when the actual rotational speed tries to enter into the prohibiting zone so that is kicks back the rotational speed to the outside of the prohibiting zone by primarily increasing or decreasing an output of a hydraulic turbine 2. With this arrangement, the capacity of the cyclo converter 3 can be set at the condition that the output prohibiting zone is provided and further a power generation output range is the same as the case wherein the output prohibiting zone is not provided.

7. 发明专利

JPS62255581A VARIABLE SPEED WATER PUMPING SYSTEM 失效
公开(公告)号：JPS62255581A
公开(公告)日：1987-11-07
申请号：JP9984786
申请日：1986-04-30
申请人： HITACHI LTD
发明人： KUWABARA HISAO , BANDO AKIRA , HAYASHI SHIGEAKI , YOKOYAMA ISAO , NAKAGAWA HIROTO
IPC分类号： F03B15/04
摘要： PURPOSE:To correspond to an electric power system control such as an automatic frequency control or the like, by permitting a regulation of a motor output in accordance with an external command signal while water is pumped up. CONSTITUTION:When a pump head H and a motor output command P0E are given, a motor output is given to a secondary winding phase angle calculation unit 16 so that phase units 22a-23c control excitation for causing an actual motor output to coincide with the command signal. On the other hand, when the pump head H and the motor output command P0E are input, an optimum rotational speed function generator 33 produces an optimum rotational speed command NOPT. A rotational speed difference signal between the optimum rotational speed command NOPT and an actual rotational speed sensing signal N is output from an adder 31. The output is applied to a guide vane opening control device 32 for controlling a servo system 14 for operating a guide vane to that an amount of water passing through a pump is regulated. With this arrangement, operation is effected at a rotational speed of maximum efficiency which is different depending on an output.

8. 发明专利

JPS62255580A METHOD OF CONTROLLING VARIABLE SPEED DRIVE DEVICE FOR HYDRAULIC MACHINE 失效
公开(公告)号：JPS62255580A
公开(公告)日：1987-11-07
申请号：JP9984186
申请日：1986-04-30
申请人： HITACHI LTD
发明人： KUWABARA HISAO , BANDO AKIRA , MINATO MASAHIRO , HAYASHI SHIGEAKI
IPC分类号： F03B15/04
摘要： PURPOSE:To correspond to an electric power system control such as an automatic frequency control or the like, by permitting a regulation of a motor output in accordance with an external command signal while water is pumped up. CONSTITUTION:When a pump head H and a motor output command P0E are given, a motor output P0 is given to a phase angle calculation unit 16 so that phase units 22a-22c control excitation for causing an actual motor output to coincide with the command signal. On the other hand, when the pump head H and the motor output command P0E are input, an optimum rotational speed function generator 30 produces an optimum rotational speed command NOPT and an optimum guide vane opening function generator produces an optimum guide vane command signal YOPT. The optimum rotational speed command NOPT is compared with an actual rotational speed sensing signal N and a difference between them is input to a correction calculator 32. A correction signal DELTAYN produced by the correction calculator 32 is combined with the optimum guide vane command signal YOPT by an adder 34 and the combined output is given to a servo system 14.

9. 发明专利

JPS63212774A CONTROL DEVICE FOR VARIABLE-SPEED PUMPED STORAGE POWER GENERATOR 失效
公开(公告)号：JPS63212774A
公开(公告)日：1988-09-05
申请号：JP9984686
申请日：1986-04-30
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： SAKAYORI AKIHIRO , KUWABARA HISAO , BANDO AKIRA , ONO YASUTERU , HAYASHI SHIGEAKI
IPC分类号： F03B15/04
摘要： PURPOSE:To improve the efficiency of the pump operation by controlling the optimum guide vane opening in response to the electric power command concurrently with the input control and rotating speed control of a motor. CONSTITUTION:The optimum rotating speed NOPT is calculated based on the electric power command Po and full pump head HST from the outside, and it is compared with the actual rotating speed N. The Optimum guide vane opening YOPT is calculated based on the load command Po and full pump head HST from the outside of an electric power control circuit, and it is compared with the actual guide vane opening Y. N=NOPT can be set by a rotating speed control circuit, and Y= YOPT can be set by a guide vane control circuit. Accordingly, the high-efficiency load control can be performed in response to the electric power command.

10. 发明专利

JPS62255583A VARIABLE SPEED HYDRAULIC TURBINE GENERATOR 失效
公开(公告)号：JPS62255583A
公开(公告)日：1987-11-07
申请号：JP9984286
申请日：1986-04-30
申请人： HITACHI LTD
发明人： KUWABARA HISAO , BANDO AKIRA , ITO AKIO , HAYASHI SHIGEAKI , HARAGUCHI EIJI
IPC分类号： F03B15/06 , H02P9/04
摘要： PURPOSE:To realize a maximum power generation output range with a cyclo converter of minimum capacity, by slidingly providing operation points avoiding a cyclo converter output prohibiting zone in the vicinity of a synchronous speed CONSTITUTION:When a hydraulic turbine characteristic function generator 5 produces an output which enters into the output prohibiting zone of a cycle converter 3, a history function generator 19 replaces the output with a rotational speed command which turns away the prohibiting zone. Then, a correction calculator 11 produces a correction signal so that an actual rotational speed coincides with the corrected rotational speed command. Further, a prohibiting zone kick back element 20 corrects a power generation output command when the actual rotational speed tries to enter into the prohibiting zone so that it kicks back the rotational speed to the outside of the prohibiting zone by primarily increasing or decreasing an output applied to a generator 1, i.e., a load imposed on a water turbine. With this arrangement, the capacity of the cyclo converter 3 can be set at the condition that the output prohibiting zone is provided and further a power generation output range is the same as the case wherein the output prohibiting zone is not provided.

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