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71. 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.

72. 发明专利

JPS62255582A VARIABLE SPEED WATER PUMPING SYSTEM 失效
公开(公告)号：JPS62255582A
公开(公告)日：1987-11-07
申请号：JP9984886
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 a secondary winding excitation amount setting unit 17 sets an exciting amount of a secondary winding considering an actual rotational speed N and 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 guide vane opening function generator 33 produces an optimum guide vane opening YOPT. A servo system 14 for operating a guide vane is controlled based on the output for regulating an amount of water passing through a pump. With this arrangement, operation is effected at a rotational speed of maximum efficiency which is different depending on an output.

73. 发明专利

JPS62228673A CONTROLLING SYSTEM FOR VARIABLE-SPEED DRIVE DEVICE OF HYDRAULIC MACHINE 失效
公开(公告)号：JPS62228673A
公开(公告)日：1987-10-07
申请号：JP2399786
申请日：1986-02-07
申请人： KANSAI ELECTRIC POWER CO , HITACHI LTD
发明人： HARAGUCHI EIJI , NAKAGAWA HIROTO , KUWABARA HISAO , BANDO AKIRA
IPC分类号： F03B15/04
摘要： PURPOSE:To cope with power system control by determining the optimum guide vane opening based on the turbine rotating speed and the fall and correcting the motor output via a change in the change rate of the rotating speed by a predetermined value or more. CONSTITUTION:If the water head H and motor output command Po are given, an output is sent to a phase angle calculating section 16, and the optimum guide vane opening is calculated by an optimum opening function generator 13 based on the rotating speed N. An output of a differentiating circuit 23 at the rotating speed N is fed to a limitting band circuit 24, and when the differential value of the rotating speed N is changed by a predetermined value or more, the motor output is corrected. Accordingly, power system control such as automatic frequency control can be applied.

74. 发明专利

JPS6281999A OPERATION CONTROL METHOD FOR VARIABLE-SPEED PUMPED-STORAGE POWER SYSTEM 失效
公开(公告)号：JPS6281999A
公开(公告)日：1987-04-15
申请号：JP21949085
申请日：1985-10-02
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： H02P27/02 , H02P9/04 , H02P23/07 , H02P23/16 , H02P23/24 , H02P27/05
摘要： PURPOSE:To control system frequency stably on governor free-operation under pumping operation by controlling the number of revolution of an induction machine in response to a frequency deviation on pumping operation by controlling a governor. CONSTITUTION:A power control-command converter C1 adds a power control command P01 corresponding to a deviation between system frequency fL and reference frequency f0 and a power control command value P0 transmitted from a console T, and sends an overall power control command POG to a control circuit C. The control command section C computes the optimum valve opening Y of a governor valve 12 and the exciting voltage V of a variable speed machine G1 on the basis of a head command H transmitted from the console T, the number of revolution N from a revolution detector 11, the power control command POG and effective power from an effective-power computing section 21.

75. 发明专利

JPS61295890A CURRENT DETECTOR FOR STATIONARY SCHERBIUS 失效
公开(公告)号：JPS61295890A
公开(公告)日：1986-12-26
申请号：JP13601885
申请日：1985-06-24
申请人： KANSAI ELECTRIC POWER CO , HITACHI LTD
发明人： NAKAGAWA HIROTO , HARAGUCHI EIJI , BANDO AKIRA
IPC分类号： H02P21/22 , H02P23/00 , H02P23/07 , H02P23/16 , H02P23/24 , H02P27/04 , H02P27/05 , H02P27/16
摘要： PURPOSE:To enable to accurately detect a zero current period by accurately converting a small current range near synchronizing speed by a small current transformer to a current detection signal. CONSTITUTION:Large current detection signals 8a-8c obtained from large current transformers 6a-6c, small current detection signals 21a-21c obtained from small current transformers 11a-11c for measuring only small currents near the polarity change point flowing to the output circuits of cycloconverters 2a-2c, and a speed detection signal 9 obtained from a speed detector 5 are input to zero current detectors 12a-12c. When the values of the signals 8a-8c become the prescribed value or lower near the synchronizing speed, the timing that the output currents of the cycloconverters 2a-2c become zero is detected on the basis of the signals 21a-21c.

76. 发明专利

JPS61240829A OPERATION OF PUMP-UP GENERATOR MOTOR 失效
公开(公告)号：JPS61240829A
公开(公告)日：1986-10-27
申请号：JP8017685
申请日：1985-04-17
申请人： KANSAI ELECTRIC POWER CO , HITACHI LTD
发明人： HARAGUCHI EIJI , NAKAGAWA HIROTO , BANDO AKIRA , ONO KENICHI , KASHIWAZAKI HIROSHI , SUGISAKA HIROSHI
IPC分类号： H02J15/00 , F03B15/00 , F03B15/02 , H02P9/00 , H02P9/42

77. 发明专利

JP2014093840A Variable speed generator motor system 有权
标题翻译：变速发电机电机系统
公开(公告)号：JP2014093840A
公开(公告)日：2014-05-19
申请号：JP2012242281
申请日：2012-11-02
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： YANO TOMOHIRO , HIGUCHI MIKIMASA , BANDO AKIRA
IPC分类号： H02P9/00 , H02P9/04
摘要： PROBLEM TO BE SOLVED: To provide a variable speed generator motor system for appropriately protecting against overvoltage.SOLUTION: The variable speed generator motor system comprises: an AC excitation synchronous machine 17; a plurality of frequency conversion means 15a, 15b, 15c for converting the frequency of AC power input from a three-phase AC system 31 and outputting the converted power to a secondary side winding of the AC excitation synchronous machine 17 via secondary side wirings ma, mb, mc; arresters 19a, 19b, 19c disposed in wirings na, nb, nc connecting a neutral point p of the secondary side wirings ma, mb, mc and the secondary side wirings ma, mb, mc corresponding to each phase of the AC excitation synchronous machine 17; a plurality of arrester current detectors 20a, 20b, 20c for directly or indirectly detecting an arrester current flowing in each of the arresters 19a, 19b, 19c; and a current abnormality detector 21 for detecting that there is abnormality when the absolute value of at least one of the arrester currents exceeds a prescribed threshold.
摘要翻译：要解决的问题：提供适当防止过电压的变速发电机电机系统。解决方案：变速发电机电机系统包括：交流励磁同步电机17; 多个频率转换装置15a，15b，15c，用于转换从三相交流系统31输入的交流电力的频率，并将转换后的电力经由次级侧配线ma输出到交流励磁同步电机17的次级绕组， mb，mc 连接二次侧配线ma，mb，mc的中性点p和对应于交流励磁同步电机17的各相的次级侧配线ma，mb，mc的配线na，nb，nc的避雷器19a，19b，19c ; 用于直接或间接检测在每个避雷器19a，19b，19c中流动的避雷器电流的多个避雷器电流检测器20a，20b，20c; 以及电流异常检测器21，用于当至少一个避雷器电流的绝对值超过规定的阈值时检测出异常。

78. 发明专利

JP2014057488A Power conversion device, power conversion system, and power conversion device control method 有权
标题翻译：功率转换装置，功率转换系统和功率转换装置控制方法
公开(公告)号：JP2014057488A
公开(公告)日：2014-03-27
申请号：JP2012202195
申请日：2012-09-14
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： INOUE SHIGENORI , KATO SHUJI , BANDO AKIRA , KIYOFUJI YASUHIRO , EGUCHI YOSHIO , ICHINOSE MASAYA , YAMAMOTO TAKAYOSHI
IPC分类号： H02M7/483
CPC分类号： H02M7/2173 , H02M5/10 , H02M5/4585 , H02M7/483 , H02M7/5388 , H02M2007/4835
摘要： PROBLEM TO BE SOLVED: To provide a power conversion device, a power conversion system, and a power conversion device control method capable of restraining a superimposed voltage from appearing at a DC side terminal in an arm balance control based zero-phase voltage superimposition method and still capable of responding to unevenness in capacitor voltage.SOLUTION: In a power conversion device 102 configured by connecting a plurality of series circuits of an arm and a transformer winding in parallel, the arm being configured by connecting in series one or a plurality of unit converters 105 provided with at least one energy storage element and at least one switching element and having at least two terminals for outputting a voltage dependent on the voltage of the energy storage element or a zero voltage depending on on/off of the switching element, with a multi-phase power supply 101 or a multi-phase load connected to the other winding of a transformer 103 and the parallel connection points configured as DC terminals, means for controlling a current flowing in each arm so as to have different amplitudes and phases is provided.
摘要翻译：要解决的问题：提供一种在基于臂平衡控制的零相电压叠加方法中能够抑制在DC侧端子处出现叠加电压的电力转换装置，电力转换系统和电力转换装置控制方法，以及仍然能够响应电容器电压的不均匀性。解决方案：在通过并联连接臂和变压器绕组的多个串联电路而构成的电力转换装置102中，臂通过串联连接一个或多个单元设置有至少一个能量存储元件和至少一个开关元件的转换器105，并且具有至少两个端子，用于输出取决于能量存储元件的电压的电压或取决于开关元件的导通/截止的零电压，连接到变压器103的另一个绕组的多相电源101或多相负载以及并联连接端子被配置为DC端子的装置，用于控制在每个臂中流动的电流以便具有不同的幅度和相位的装置。

79. 发明专利

JP2011055571A Semiconductor power conversion device 有权
标题翻译：半导体功率转换器件
公开(公告)号：JP2011055571A
公开(公告)日：2011-03-17
申请号：JP2009199204
申请日：2009-08-31
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： BANDO AKIRA , KIYOFUJI YASUHIRO , ICHINOSE MASAYA , SAKAI HIROMITSU , IMAZU YASUHIRO
IPC分类号： H02M7/12
CPC分类号： H02M7/5395 , H02M1/14
摘要： PROBLEM TO BE SOLVED: To provide a semiconductor power conversion device which can suppress the pulsation of a frequency which is twice that of a power supply frequency generated at the DC side of the semiconductor power conversion device, even when an abnormality occurs on the side of an AC power supply, and which can stably continue operation. SOLUTION: The semiconductor power conversion device adds a negative-phase current command to a current command so that doubled-frequency pulsation on the DC side is suppressed. The pulsation is suppressed, while securing the stability of a current control system, by obtaining a negative-phase current command from a detection value of a positive-phase voltage vector and a detection value of a negative-phase voltage vector on the side of the power supply, and a positive-phase current command. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：为了提供能够抑制在半导体功率转换装置的DC侧产生的电源频率的频率的两倍的频率的脉动的半导体功率转换装置，即使发生异常，交流电源的一侧，可以稳定地继续运行。解决方案：半导体功率转换装置向电流指令添加负相电流指令，从而抑制DC侧的双频脉动。在确保电流控制系统的稳定性的同时，通过从正相电压矢量的检测值和负相电压矢量的检测值得到负相电流指令来抑制脉动，同时，电源和正相电流指令。版权所有（C）2011，JPO＆INPIT

80. 发明专利

JP2008262557A Task management device for controller and task management method for controller 有权
标题翻译：用于控制器的任务管理设备和控制器的任务管理方法
公开(公告)号：JP2008262557A
公开(公告)日：2008-10-30
申请号：JP2008089158
申请日：2008-03-31
申请人： Hitachi Information & Control Solutions Ltd , Hitachi Ltd , 株式会社日立情報制御ソリューションズ , 株式会社日立製作所
发明人： BANDO AKIRA , OGURA MAKOTO , UMEHARA TAKASHI , KOBAYASHI MASAMITSU , NAGAYAMA HISAO , MASUKO NAOYA , ISHIKAWA MASAKAZU , SHIRAISHI MASAHIRO , ONOZUKA AKIHIRO , ENDO HIROMICHI , YAMADA TSUTOMU , FUNAKI SATORU
IPC分类号： G06F11/18
摘要： PROBLEM TO BE SOLVED: To simultaneously achieve the miniaturization, improvement of performance, and safety of a device by using a plurality of processors for improving reliability. SOLUTION: Processing results which are operated on a common data processing target to allow mutual compatibility are inputted to a plurality of processors. When receiving a start signal from one processor, a calculation instruction signal is outputted to the processors so that the operation timing of one processor differs from that of the other processor. A calculation effect of one processor is compared with that of the other processor, In this way, the miniaturization, improvement of performance, and safety are simultaneously achieved for a plurality of processors, and high reliability can be obtained. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：通过使用多个处理器来同时实现设备的小型化，性能的提高和安全性，以提高可靠性。解决方案：在公共数据处理目标上操作以允许相互兼容的处理结果被输入到多个处理器。当从一个处理器接收到起始信号时，将计算指令信号输出到处理器，使得一个处理器的操作定时与另一处理器的操作定时不同。将一个处理器的计算效果与其他处理器的计算效果进行比较。这样，可以同时实现多个处理器的小型化，性能提高和安全性的提高，可以获得高可靠性。版权所有（C）2009，JPO＆INPIT

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