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1. 发明专利

JP2000014010A CONTROL SWITCHING SYSTEM FOR PHASE MODIFICATION CONTROLLER AND CONTROL METHOD THEREFOR 失效
公开(公告)号：JP2000014010A
公开(公告)日：2000-01-14
申请号：JP17433498
申请日：1998-06-22
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： ISAKA YASUSHI , WADA YOSHIHARU
IPC分类号： H02J3/06 , G05F1/70 , H02J3/18
摘要： PROBLEM TO BE SOLVED: To effectively utilize phase modifying equipment and protect a transformer for linkage by switching through a control switching circuit, so that the transformer for linkage will control the phase modifying equipment in overloaded state from a phase modification controller. SOLUTION: A phase modifying equipment 16 for reactive power compensation is placed between a transformer 14 for alternating current-to-direct current conversion and a transformer 15 for linkage of direct-current transmission equipment, and the phase modifying equipment 16 for reactive power compensation supplies reactive power to a voltage which is increased at the transformer 14 for alternating the current- to-direct current conversion to stabilize the supply of voltage. The calculation control circuit 20 of a phase modification controller 18 is fed with a power setting value signal 19 from a power set value circuit 17 during operation of an alternating current- to-direct current converter for performing control arithmetic operation, and outputs the result of the control arithmetic operation as 'on'/'off' operation commanding signal 21 to the phase modifying equipment 16 for reactive power compensation. When the transformer 15 for linkage is overloaded, an auxiliary relay is operated to change the control route. As a result, the effective utilization of the phase modifying equipment and the protection of the transformer device for linkage are made feasible.

2. 发明专利

JP2013027062A Gas-insulated switchgear 有权
标题翻译：气体绝缘开关
公开(公告)号：JP2013027062A
公开(公告)日：2013-02-04
申请号：JP2011156213
申请日：2011-07-15
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ONO DAISUKE , YAMADA HITOSHI , WADA YOSHIHARU
IPC分类号： H02B13/02
摘要： PROBLEM TO BE SOLVED: To provide a GIS with one and half breaker scheme for which installation site area can be further reduced and for which maintenance inspection work space can be sufficiently secured.SOLUTION: Each of three horizontally-laid type circuit breakers CB1 to CB3 is provided with connection openings 22a, 22b directed upward in a closed vessel 20 storing a shut-off part 21, and the three circuit breakers for three-phases are installed side by side as a set. Main buses Bus1, Bus2 are arranged in upper and lower two stages in a space above one end side part in the horizontally-laid type circuit breakers CB1 to CB3 in an axial direction, and connection bus bars 11, 12 are arranged in upper and lower two stages in a space above the other end side part in the horizontally-laid type circuit breakers CB1 to CB3 in an axial direction. The main buses Bus1, Bus2 and the horizontally-laid type circuit breakers CB1 to CB3 are connected by the connection bus bars 11, 12 with disconnectors DS1 to DS6 interposed therebetween, and branching bus bars 15, 16 are arranged above and connected to the connection bus bars 11, 12, respectively, to configurate a gas-insulated switchgear with one and half breaker scheme.
摘要翻译：要解决的问题：为GIS提供一个半断路器方案，可以进一步减少安装地点面积，并且可以充分确保维护检查工作空间。解决方案：三个水平放置型断路器CB1至CB3中的每一个在存储关闭部分21的密闭容器20中设置有向上的连接开口22a，22b，并且三相的三个断路器并排安装。主母线Bus1，Bus2在水平放置式断路器CB1〜CB3的轴向上的一端侧上方的上下两级配置，连接汇流条11,12上下配置水平放置型断路器CB1〜CB3的轴向另一端侧的空间的两个阶段。主母线Bus1，Bus2和水平放置式断路器CB1至CB3通过连接母线11,12连接，隔离开关DS1至DS6插入其间，分支母线15,16布置在连接上方并连接汇流条11,12，以配置具有一半断路器方案的气体绝缘开关设备。版权所有（C）2013，JPO＆INPIT

3. 发明专利

JPH1118276A EQUIPMENT-PROTECTING DEVICE 失效
公开(公告)号：JPH1118276A
公开(公告)日：1999-01-22
申请号：JP16555397
申请日：1997-06-23
申请人： HITACHI LTD
发明人： WADA YOSHIHARU
IPC分类号： H02H3/05 , H02H3/06 , H02H7/12
摘要： PROBLEM TO BE SOLVED: To enable a device to surely detect abnormal conditions, even in the case that the condition is repeated generated and exceeds a durable amount of a protective object. SOLUTION: Based on an output of a protecting relay 10 which detects abnormality of a protective object, a cumulative time of the protective object placed in an abnormal condition is measured by a counter 12, and when the protective object is returned to a normal condition from the abnormal condition, a continued time of the normal condition is measured by a counter 26. If an output of the counter 26 exceeds a reset time settling level T2, the protective object is decided to have returned completely to the normal condition, and a measurement value of the counter 12 is reset. Without resetting the measurement value of the counter 12, when its output exceeds a durable amount time settling level T1, the abnormal condition is considered to exceed a durable amount of the protective object, and a protection output for protecting the protective object is generated through a timer 16 from a comparator 14.

4. 发明专利

JPH08166828A REACTIVE POWER COMPENSATING DEVICE 失效
公开(公告)号：JPH08166828A
公开(公告)日：1996-06-25
申请号：JP31021694
申请日：1994-12-14
申请人： HITACHI LTD
发明人： WADA YOSHIHARU
IPC分类号： H02J3/18 , G05F1/70
摘要： PURPOSE: To detect a system fault, suppress voltage variation by circuit reclosure and line disconnection, and stabilize the system by providing a decision means for a system accident and a circuit which widens the control range of a controller. CONSTITUTION: The controller 70 normally has limiter width enough for voltage variation in the case of a system accident, performs operation while the output is suppressed by a limiter 14, and waits for other phase modifying equipments to respond. In another way, a limiter operation detector 16 detects the reactive power compensating device being in limiter operation and outputs a control request signal to a phase modifying capacitor 10 to prevent long-time limiter operation. In case of the system fault, a system accident deciding circuit 13 decides the system accident with information from a breaker 8 and a voltage detector 11. Then a limiter switching command is supplied to the limiter 14, whose limiter width is widened to suppress the voltage variation of the system.

5. 发明专利

JP2015040763A 部分放電計測装置及びその方法审中-公开
标题翻译：部分放电测量装置及其方法
公开(公告)号：JP2015040763A
公开(公告)日：2015-03-02
申请号：JP2013171853
申请日：2013-08-22
申请人：株式会社日立製作所 , Hitachi Ltd
发明人： KOBAYASHI CHIE , ROKUNOHE TOSHIAKI , WADA YOSHIHARU , KOBAYASHI TAKESHI , OBAYASHI AKIRA
IPC分类号： G01R31/12 , G01R31/14
CPC分类号： G01R31/1227
摘要：【課題】装置を駆動するために必要な電力を外部主電源によらずに供給可能なことは勿論、データの送信に必要な電力が十分に得られ、かつ、装置を大型化することなく、電力機器の部分放電検出装置を動作させるために十分な電力を得ること。【解決手段】本発明の部分放電計測装置は、上記課題を解決するため、センサで検出した診断対象機器で発生する部分放電信号を、該部分放電信号と主回路電圧位相信号に分離する周波数分離部と、該周波数分離部で分離された前記部分放電信号と主回路電圧位相信号が入力され、該部分放電信号と主回路電圧位相信号に基づいて、主回路電圧に同期した部分放電信号を演算する演算装置と、前記主回路電圧を分圧した電圧を取り出し、前記演算装置へ電源電圧を供給する電源装置と、該電源装置に、少なくとも前記演算装置への電源ON/OFF指令を出すコントロールユニットとを備えていることを特徴とする。【選択図】図1
摘要翻译：要解决的问题：提供一种局部放电测量装置，其能够独立于外部主电源供应驱动装置所需的电力，充分获得发送数据所需的电力，并且可以获得足以操作局部放电检测装置的局部放电检测装置的电力电力设备，而不增加装置的尺寸。解决方案：局部放电测量装置包括：频率分离部分，其将由传感器检测到的诊断对象设备中产生的局部放电信号分离成局部放电信号，以及主电路电压相位信号 ; 输入由分频部分分离的局部放电信号和主电路电压相位信号的算术单元，其基于局部放电信号和主电路电压计算与主电路电压同步的局部放电信号相位信号; 电源装置，其取出通过分割主电路电压而获得的电压，并将电源电压提供给运算单元。电源装置至少包括一个向运算单元输出电源ON / OFF命令的控制单元。

6. 发明专利

JPH0965665A POWER CONVERTER AND ITS CONTROL 失效
公开(公告)号：JPH0965665A
公开(公告)日：1997-03-07
申请号：JP22022695
申请日：1995-08-29
申请人： HITACHI LTD
发明人： WADA YOSHIHARU , OHASHI TSUNEYOSHI
IPC分类号： H02J1/00 , H02J3/06 , H02M1/08 , H02M7/72
摘要： PROBLEM TO BE SOLVED: To provide a power converter and its method wherein BPP does not occur at both end portions and switching element and DC circuit may be protected even if the same type of fault occurs at both end portions of both systems. SOLUTION: In a method of controlling a power converter, each corresponding phase of different power systems 3, 3 or the power system related to AC is respectively connected via the primary coils of transformers 2, 2 for conversion, a control voltage is applied to a secondary coil of this transformer for conversion and phase and amplitude of this control voltage are controlled via switching elements 1, 1 and a DC circuit having a DC reactor 4 in order to control the flow of power between the power systems. When the voltage of both systems drops, an energy of the DC circuit is forced to exhaust to the AC side and this operation is continued until recovery of the system voltage and thereby the converter is stopped after attenuation of the DC current.

7. 发明专利

JPH0635556A CONTROLLER FOR SYNCHRONOUS ROTARY PHASE MODIFIER 失效
公开(公告)号：JPH0635556A
公开(公告)日：1994-02-10
申请号：JP19370292
申请日：1992-07-21
申请人： HITACHI LTD
发明人： WADA YOSHIHARU , NAKAMURA TOMOHARU , WAKASUGI KENJI
IPC分类号： G05F1/70 , H02J3/18
摘要： PURPOSE:To prevent the operation of a limiter and to effectively display a constant voltage control function by changing the voltage of an output terminal in accordance with the deviation of the float set value being the reference operation value. CONSTITUTION:A controller 5 detects the current and the voltage of a system by the detectors 10 and 13 by use of the detection signals of a current transformer 12 and a transformer 6 connected to a system. Then the controller 5 calculates the wattless power Q generated by a rotary phase modifier RC and compares this value with the set value Qref of the wattless power Q to obtain the deviation DELTAQ. The deviation DELTAQ given from a subtractor 15 is integrated by an integrator 16, and the integrated value Vf being the integration output is subtracted from a target voltage setter 11. Then the target voltage value is changed based on the deviation of the wattless power generated by the RC. Thus it is possible to cope with the up-down change of a stable point and to control to avoid the operation of a limiter.

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