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1. 发明专利

JPH10257800A AC-EXCITED MOTOR GENERATOR AND ITS OPERATION METHOD 失效
公开(公告)号：JPH10257800A
公开(公告)日：1998-09-25
申请号：JP5354397
申请日：1997-03-07
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： ENDO MASAICHI , YASAKA YASUHIRO , MAOKA AKIHIRO , FUTAMI MOTOO , ICHINOSE MASAYA , UNO SEINOSUKE , HAYASHIDA HIROSHI , NISHIO TORU , MINOGUCHI KIYOSHI , RIYOUMAN AKIRA
IPC分类号： H02P9/00
摘要： PROBLEM TO BE SOLVED: To provide an AC-excited motor generator that can extend a stable operation range even in a range of shortage excitation, and its operation method. SOLUTION: In the operation method of an AC-excited motor generator where a current controller 18 of an AC-excited generator 3 controls a current by dividing into a q-axis current component for controlling an effective power and a d-axis current component for controlling a reactive power, a primary voltage phase operator 21 that calculates a voltage phase θv of a primary voltage based on the output of the above power detector, a rotor phase detector 12 that detects a rotary angle θr being indicated by the electrical angle of the AC-excitated generator 3, a phase detector 20 that calculates a difference between the voltage phase θv and the rotary angle θr (θs =θv -θr ) are provided, thus controlling the current controller 18 so that the speed of the secondary current of the AC-excited generator 3 becomes faster than the change in the angular velocity of the rotor.

2. 发明专利

JP2000188832A AC POWER SYSTEM FACILITY 失效
公开(公告)号：JP2000188832A
公开(公告)日：2000-07-04
申请号：JP36502498
申请日：1998-12-22
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： KAYUKAWA SHIGEHIRO , ENDO MASAICHI , FUTAMI MOTOO , MAOKA AKIHIRO , HIGUCHI MIKISUKE , NISHIO TORU , KATO YUICHI , MOROMITSU AKIRA
IPC分类号： H02J3/38 , H02J3/24 , H02P9/00
摘要： PROBLEM TO BE SOLVED: To reduce system turbulence when closing a circuit breaker again after recovering from system outage by using an AC-excitation-type generation motor with a power conversion device for a generation motor, and at the same time providing a means for controlling an outage current flowing through a circuit breaker for protecting power system in a control device. SOLUTION: In an AC power system 1, there is provided an AC-excitation- type generation dynamo electric means where the means comprises an AC- excited generator motor 2 where a primary coil winding side is connected to an AC system via a transformer 4, a power conversion device 11 where power is fed from the AC power system 1 via the transformer 4 and an output side is connected to the secondary coil winding of the AC-excited generator motor 2 for feeding an AC current with a variable frequency, and control devices 9 and 10 that are connected to the power conversion device 11 and output a current or voltage command. Then, the voltage of the AC-excited generation rotating means is reduced by an outage detection signal that is detected by a system outage detector 21 in the case of system outage break, thus reducing the break current of a circuit breaker 18.

3. 发明专利

JP2000134996A VARIABLE-SPEED GENERATOR-MOTOR SYSTEM 失效
公开(公告)号：JP2000134996A
公开(公告)日：2000-05-12
申请号：JP30075298
申请日：1998-10-22
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： FUTAMI MOTOO , KUBOTA YUZURU , MOTOBE MITSUSACHI , KAYUKAWA SHIGEHIRO , MAOKA AKIHIRO , KATO YUICHI , NISHIO TORU , MOROMITSU AKIRA
IPC分类号： H02P9/14
摘要： PROBLEM TO BE SOLVED: To provide a variable-speed generator-motor system which is equipped with a means for retaining AC voltage or active power from becoming excessive to a usual value immediately after removal of abnormality in the case that the abnormality occurs in an AC line, and for immediately restoring it to the former state. SOLUTION: This is a variable-speed generator-motor system which is equipped with a generator-motor 14, an AC excitation means 15, a means 12 for converting the excitation current from the excitation means 15 into a current Id for excitation and a current Iq for torque, an AC voltage control means 8 for the generator-motor 14, an active power control means 2 for the generator- motor 14, and a current control means 13 for controlling the current Id for excitation of the excitor 15 and the current 11 for torque. In this case, this is provided with an AC line abnormality detection means 18, and is provided with a current-for-excitation retention means 16 which retains the current command value Idc for excitation and the current command value Iqc for torque at input value just before detection of abnormality or predetermined specified values, respectively, when abnormality occurs in the AC power line, and a current-for-torque retention means 17.

4. 发明专利

JPH10248166A STABILIZING APPARATUS FOR AC POWER SYSTEM 失效
公开(公告)号：JPH10248166A
公开(公告)日：1998-09-14
申请号：JP5173797
申请日：1997-03-06
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： YASAKA YASUHIRO , ENDO MASAICHI , FUTAMI MOTOO , MAOKA AKIHIRO , ICHINOSE MASAYA , UNO SEINOSUKE , HAYASHIDA HIROSHI , NISHIO TORU , MINOGUCHI KIYOSHI , RIYOUMAN AKIRA
IPC分类号： H02J3/24 , G05F1/70
摘要： PROBLEM TO BE SOLVED: To provide a stabilizing apparatus, for an AC power system, by which the overvoltage of the AC power system provided with a static power conversion device for linkage such as for frequency conversion or the like is suppressed at a high speed. SOLUTION: A stabilizing apparatus is provided with an AC excitation-type generator-motor 10 in which a primary winding 11 is connected to an AC system 1 via a transformer 5, with an AC excitation device 12 which supplies an AC current to its secondary winding 12 and with an exciting-current control system 20 which comprises a voltage controller 21, an effective-power controller 22 and a current controller 23. When a voltage Vp, at the AC system 1, detected by a voltage detector 9 is raised due to the trip or the like of a static power conversion device 2 so as to become higher than a prescribed voltage Vover, the voltage controller 21 outputs a voltage command Id which suppressed the overvoltage of the system voltage Vp, the reactive voltage of the system is absorbed by the AC excitation-type generator-motor 10, and a rise in a system voltage is suppressed at a high speed.

5. 发明专利

JP2003199398A METHOD AND DEVICE FOR CONTROLLING VARIABLE SPEED GENERATOR, AND VARIABLE SPEED PUMPING POWER GENERATION SYSTEM 审中-公开
公开(公告)号：JP2003199398A
公开(公告)日：2003-07-11
申请号：JP2001393498
申请日：2001-12-26
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： FUTAMI MOTOO , ENDO MASAICHI , MAOKA AKIHIRO , MOROMITSU AKIRA
IPC分类号： H02P9/00
摘要： PROBLEM TO BE SOLVED: To maintain the output frequency of a power generator at a prescribed frequency, even if a variable speed synchronous generator 14 whose secondary side is excited by the Ac-exciting device 15 of the variable frequency is in a single operation state, where it is detached from a power system V0. SOLUTION: When shift to the single-operation state is detected in a single- operation detector 18, the operation mode of a voltage phase detector is switched so that a generator voltage phase becomes constant. The constant control of power is stopped and the output frequency and output voltage are constantly controlled by using the excitation device of the variable frequency. Thus, the output frequency of the generator whose speed fluctuates is maintained to a prescribed value. When the rise in generator output voltage and sudden changes in the frequency are detected, the system moves to the single operation mode for a short period of time. Consequently, the system can move to a single operation without delay. COPYRIGHT: (C)2003,JPO

6. 发明专利

JPH10201296A AC EXCITATION TYPE GENERATOR-MOTOR 失效
公开(公告)号：JPH10201296A
公开(公告)日：1998-07-31
申请号：JP400597
申请日：1997-01-13
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： ENDO MASAICHI , MAOKA AKIHIRO , HIGUCHI MIKISUKE , FUTAMI MOTOO , ICHINOSE MASAYA , MINOGUCHI KIYOSHI
IPC分类号： H02J3/24 , H02J3/30 , H02P9/00
摘要： PROBLEM TO BE SOLVED: To improve the stability of an AC power system by performing speed control at waiting operation, and performing the effective power control in the case that abnormality occurs in an AC power system, and discharging and absorbing the effective power from an AC excitation type generator-motor suddenly. SOLUTION: In the condition that an AC excitation type of generator-motor 2 is performing waiting operation, a switch 11 is closed, and a switch 12 is opened, and the phase control of the AC excitation type generator-motor 2 is performed with the output signal of a speed controller 6, and it is controlled so as to reduce the deviation between the rotational speed detected by a speed detector 5 and the rotational speed command value, thus the speed control operation is performed. In case that abnormality occurs in an AC power system, the switch 11 is opened, and the switch 12 is closed, and the output signal of a power controller 8 is inputted into a current controller 9, and it is controlled as a to reduce the deviation between the active power supplied from the AC power system 1 detected by the power detector 7 and the active power command value given from outside, thus the active power control operation is performed.

7. 发明专利

JP2001245495A VARIABLE SPEED POWER GENERATION SYSTEM 失效
公开(公告)号：JP2001245495A
公开(公告)日：2001-09-07
申请号：JP2000055957
申请日：2000-02-28
申请人： HITACHI LTD
发明人： KUBOTA YUZURU , FUTAMI MOTOO , UEDA SHIGETA , MAOKA AKIHIRO , NISHIOKA ATSUSHI
IPC分类号： H02P23/00 , H02P9/00 , H02P21/22 , H02P21/34 , H02P23/07 , H02P23/16 , H02P23/24 , H02P27/04 , H02P27/05 , H02P5/415
摘要： PROBLEM TO BE SOLVED: To improve stability of effective power in the case that a power generation generator is synchronously operated in a variable speed power generation system. SOLUTION: The fluctuation component of speed is detected from the power generation generator, and given to the excitation current component of the rotor current of the power generation generator during synchronous operation start. Or an ramp current instruction is given to the torque current component of a rotor current.

8. 发明专利

JP2014117993A Power converter and method for controlling power converter 有权
标题翻译：电源转换器及控制电源转换器的方法
公开(公告)号：JP2014117993A
公开(公告)日：2014-06-30
申请号：JP2012273156
申请日：2012-12-14
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NAKATSUKA YASUHIRO , IMAZU YASUHIRO , MAOKA AKIHIRO , ICHINOSE MASAYA , KIYOFUJI YASUHIRO , BANDO AKIRA
IPC分类号： B60M3/06 , H02J3/06 , H02J3/32 , H02J3/36
CPC分类号： H02J3/32
摘要： PROBLEM TO BE SOLVED: To provide a power converter in which an electric motor accommodates and utilizes regenerated power.SOLUTION: A power converter 1 comprises plural power conversion units 14-1, 14-2 which are respectively connected to different feeding wires 2, a direct current accommodation unit 17 wich is connected to respective power conversion units 14-1, 14-2 and also connected to a secondary battery 16, and a power control unit 11. The power control unit 11 sends commands to the regeneration side power conversion unit 14 which is connected to the regeneration side feeding wire 2 and to the consumption side power conversion unit 14 which is connected to the consumption side feeding wire 2 so as to output electric power from the regeneration side feeding wire 2 to the consumption side feeding wire 2 via the direct current accommodation unit 17, and determines a voltage at the direct current accommodation unit 17 in such a manner that energy according to the sum of the regeneration power and the consumption power is inputted to and outputted from the secondary battery 16.
摘要翻译：要解决的问题：提供电动机容纳并利用再生电力的电力转换器。解决方案：功率转换器1包括分别连接到不同馈线2的多个功率转换单元14-1,14-2，直流调节单元17连接到各个电力转换单元14-1,14-2，并且还连接到二次电池16和电力控制单元11.功率控制单元11向再生侧电力转换单元发送命令 14连接到再生侧供电线2和与消耗侧供电线2连接的消耗侧电力转换单元14，以将电力从再生侧供电线2输出到消耗侧供电线2 通过直流调节单元17，以这样的方式确定直流调节单元17处的电压，使得根据再生器总和的能量离子功率和消耗功率被输入到二次电池16并从二次电池16输出。

9. 发明专利

JPH11220884A PROTECTION DEVICE OF SELF-EXCITATION TYPE CONVERTER, CONTROL DEVICE OF VARIABLE SPEED GENERATION GENERATOR, AND CONTROL DEVICE OF SELF-QUENCHING-TYPE CONVERTER 失效
公开(公告)号：JPH11220884A
公开(公告)日：1999-08-10
申请号：JP2173998
申请日：1998-02-03
申请人： HITACHI LTD
发明人： KUBOTA YUZURU , FUTAMI MOTOO , ICHINOSE MASAYA , MAOKA AKIHIRO , HIGUCHI MIKISUKE , MOTOBE MITSUSACHI
IPC分类号： H02M7/48 , H02P9/00
摘要： PROBLEM TO BE SOLVED: To perform gate blocking only for a phase where an overcurrent is generated and to continue gate control for the other phases by independently providing an over-current detection circuit and a gate block circuit for each phase of an inverter. SOLUTION: GTO elements 5a and 5b, GTO elements 7a and 7b, and GTO elements 9a and 9b of a self-quenching-type switching element are connected in series between both terminals of a DC power supply 1 for parallel connection. Further, U, V, and W-phase circuits are used, where diodes 6a-10b are connected in parallel with each GTO element with inverse polarity. Further, current detectors 11a-11c and gate pulse block circuits 13a-13c are independently provided for each phase, thus achieving a function for detecting an eddy current and for performing the gate pulse block of only the GTO element of a phase where the overcurrent is generated. As a result, the GTO element of a phase where the overcurrent is generated is protected from the overcurrent. The other phases continue gate control for achieving continuous operation without stopping a system.

10. 发明专利

JP2013244799A Power storage type regenerated power absorber and its controlling method 有权
标题翻译：电力储能型再生能量吸收器及其控制方法
公开(公告)号：JP2013244799A
公开(公告)日：2013-12-09
申请号：JP2012118887
申请日：2012-05-24
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ITO TOMOMICHI , BANDO AKIRA , ITO NAOTO , MAOKA AKIHIRO
IPC分类号： B60M3/06
摘要： PROBLEM TO BE SOLVED: To prevent the occurrence of unnecessary loss of DC/DC power converter, by stabilizing a power feeder voltage, preventing overcharge and overdischarge on/from a storage battery, and preventing control hunting.SOLUTION: A power storage type regenerated power absorber including: a power converter connected between a feeder line and a rail in a direct current feeder section; and a power storage element connected to the power converter, controls a gate signal which is given to the power converter by a voltage control mode for controlling power feeder voltage in a first range by charging/discharging of the power storage element, and a charging rate control mode for controlling a charging rate so as to be close to a second range when the power feeder voltage is in the first range, and the charging rate of the power storage element is outside of the second range. It includes a suppression mode which turns off the gate signal given to the power converter, in a changing stage from the voltage control mode to the charge rate control mode.
摘要翻译：要解决的问题：为了防止DC / DC电力转换器的不必要的损失的发生，通过稳定供电电压，防止蓄电池过充电和过放电，并防止控制狩猎。解决方案：蓄电式再生电源吸收器包括：在直流馈电部分中连接在馈电线路和轨道之间的功率转换器; 以及与功率转换器连接的蓄电元件，通过用于通过蓄电元件的充电/放电来控制第一范围内的馈电电压的电压控制模式来控制向功率转换器供给的栅极信号，以及充电率控制模式，用于当供电电压处于第一范围时控制充电速率以接近第二范围，并且蓄电元件的充电率在第二范围之外。它包括在从电压控制模式到充电速率控制模式的变化阶段中关闭给予功率转换器的门信号的抑制模式。

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