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1. 发明专利

JP2004064960A Power supply system 有权
公开(公告)号：JP2004064960A
公开(公告)日：2004-02-26
申请号：JP2002223071
申请日：2002-07-31
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ONO YASUNORI , KONDO SHINICHI , UCHIYAMA TOMOYUKI , IIZUKA AKIO , FUJITA YASUNOBU , KAWAMURA NAOTERU
IPC分类号： H02J3/00
CPC分类号： Y02E40/72 , Y04S10/12
摘要： PROBLEM TO BE SOLVED: To sustain receiving power from a transmission/distribution system at a low level in day and night through seasons.
SOLUTION: When a load 40 of a consumer 1a is supplied with power generated from a generator 30 and power received from a transmission/distribution system, a supervisory controller 22 collects information concerning to power consumption of the load 40 at a specified time interval, generates demand data corresponding to the characteristics of the load 40 based on the information concerning to power consumption thus collected, predicts power demand at a specified time later based on the demand data thus generated, determines operation and stoppage of the generator 30 according to the prediction results, and alters control parameters for controlling the output of the generator 30 in accordance with the demand data when the generator 30 is operated.
COPYRIGHT: (C)2004,JPO

2. 发明专利

JP2002354655A GROUND FAULT DETECTING METHOD AND APPARATUS THEREFOR 失效
公开(公告)号：JP2002354655A
公开(公告)日：2002-12-06
申请号：JP2001153719
申请日：2001-05-23
申请人： HITACHI LTD
发明人： KAWAMURA NAOTERU , KANAI MINORU , FUJITA YASUNOBU , SHIBATA EKIZO
IPC分类号： H02H3/34 , G01R19/00 , G01R31/02 , H02H3/38
摘要： PROBLEM TO BE SOLVED: To provide a compact ground fault detecting apparatus by detecting zero-phase current and overcurrent flowing through a distribution line using a current transformer. SOLUTION: In the invention, when a ground voltage is detected through a limiting resistor 17A and a ground overvoltage relay 12 in the tertiary open delta circuit 10C of a transformer 10 for grounded instruments, the switching circuit 18 is closed to form a low impedance circuit 17 so that the ground fault current i1 flowing in the distribution line is detected by a transformer 5, thereby omitting a zero-phase transformer.

3. 发明专利

JP2004032983A Power supply system and its operating method 有权
公开(公告)号：JP2004032983A
公开(公告)日：2004-01-29
申请号：JP2003029735
申请日：2003-02-06
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ONO YASUNORI , KONDO SHINICHI , UCHIYAMA TOMOYUKI , FUJITA YASUNOBU , KAWAMURA NAOTERU
IPC分类号： H02J3/00
摘要： PROBLEM TO BE SOLVED: To make it possible for a consumer to supply electric power at low cost using a private power-generating facility. SOLUTION: A monitoring and controlling device 22 on the premises collects the data of electric power consumed by a load device 40 at the interval of a prescribed time. Furthermore, the data of weather, temperature and the like are added to forecast required electric power (demand) in the prescribed time. In compliance with the demand, the operation or stop of a power-generating device 30 is determined in such a way as to minimize power-supplying cost and to determine the output of the device 30 when operated. As a result, electric power purchased from a general electric utility can be suppressed low throughout day and night and in all seasons. COPYRIGHT: (C)2004,JPO

4. 发明专利

JP2003134665A ELECTRIC POWER SUPPLY METHOD AND SUPPLY SYSTEM 审中-公开
公开(公告)号：JP2003134665A
公开(公告)日：2003-05-09
申请号：JP2001320478
申请日：2001-10-18
申请人： HITACHI LTD
发明人： ONO YASUNORI , KONDO SHINICHI , TATEMI MASARU , FUJITA YASUNOBU , KAWAMURA NAOTERU
IPC分类号： H02J3/00 , H01M8/00 , H02J3/46
摘要： PROBLEM TO BE SOLVED: To enable power supply in accordance with the need of a consumer while reducing the burden of the consumer. SOLUTION: Various power quantities such as the quantity of hydrogen stored in a hydrogen storing apparatus 5 installed in the premises of a consumer, the quantity of electric power generated by a generator 3, the quantity of electric power received from a power transmission and distribution system 100a, and the quantity of electric power commissioned through a power transmission and distribution system 100b are collected to a central supervisory control center 300 through a supervisory controller 2. At the central supervisory control center, consumers' power demand is predicted and the operation conditions of each consumer is determined so as to control and operate respective apparatuses through the supervisory controller 2 of each consumer. Based on each power data, power rate is calculated depending on the consumption of electric power and outputted.

5. 发明专利

JP2008220160A Panelboard for direct current circuits having commutation-type dc breaker 有权
标题翻译：具有直流断路器的直流电路板
公开(公告)号：JP2008220160A
公开(公告)日：2008-09-18
申请号：JP2008026274
申请日：2008-02-06
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SUZUKI SANETOSHI , MATSUDA YOSHIHIKO , KAWAMURA NAOTERU , HAGA MASARU
IPC分类号： H02B1/30 , H02B1/01
CPC分类号： H02B13/02 , H01H33/596
摘要： PROBLEM TO BE SOLVED: To provide a panelboard for direct current circuits with a commutation type DC breaker, capable of standardizing design of DC breaker storage box, and reducing labor and time required for manufacturing a panelboard for DC circuits suitable to various and versatile applications and specifications.
SOLUTION: The panelboard for DC circuits having commutation-type DC breaker includes a DC breaker storage box having as a standard structure a main circuit with a master switch, and a commutation-type DC breaker with a commutation circuit having a commutating capacitor and a commutation switch electrically connected in parallel to the master switch; a front-face accommodating box in front of the DC breaker accommodating box with apparatuses for controlling the panelboard and displaying its condition/failure; and a back-face accommodating box at the rear of the DC breaker accommodating box with the apparatuses for monitoring and maintaining the main circuit. These front-face and back-face accommodating boxes are respectively connected to the DC breaker accommodating box to integrate the constitution of the panelboard.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种具有换向型直流断路器的直流电路的电路板，能够标准化DC断路器存储箱的设计，并且减少用于制造用于直流电路的电路板所需的人力和时间，适用于各种和多功能应用和规格。解决方案：具有换向型直流断路器的DC电路的电路板包括具有标准结构的具有主开关的主电路的直流断路器存储箱和具有换向电路的换向型直流断路器，该换向电路具有换向电容器以及与主开关并联电连接的换向开关; 在DC断路器容纳箱前面的前面容纳盒，其具有用于控制面板并显示其状况/故障的装置; 以及在DC断路器容纳箱的后部具有用于监视和维护主电路的装置的背面容纳盒。这些前面和后面容纳盒分别连接到DC断路器容纳盒以整合面板的结构。版权所有（C）2008，JPO＆INPIT

6. 发明专利

JP2005184906A Method and apparatus of detecting ground fault of distribution system 有权
标题翻译：检测分布系统接地故障的方法与装置
公开(公告)号：JP2005184906A
公开(公告)日：2005-07-07
申请号：JP2003419103
申请日：2003-12-17
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SHINKAWA TOMOYOSHI , KAWAMURA NAOTERU , FUJITA YASUNOBU , SATO SHINDAI
IPC分类号： H02H3/34 , H02H3/347 , H02H3/44
摘要： PROBLEM TO BE SOLVED: To reduce the size of an apparatus by detecting ground fault current at a ground fault accident time with high sensitivity by a three-phase current transformer for detecting the ground fault current and overcurrent flowing to a distribution line.
SOLUTION: The apparatus of detecting the ground fault of a distribution system includes first and second storing and holding means 305, 304 which always stores and holds a line voltage 303 and zero-phase current 302 generated at three-phase power line for several cycle part, a phase difference detecting means 307 for obtaining a phase difference of the line voltage from a present value by taking out the stored and held value of one cycle part of the line voltage from the first storing and holding means at the time of detecting zero-phase voltage 301 by a ground fault overvoltage relay, a phase correcting means 308 for phase correcting the zero phase current value stored and held in the second storing and holding means by using the phase difference, a zero-phase current difference arithmetic means 309 for obtaining the current change part by arbitrarily performing the calculation of the difference between the zero-phase current value and the present detected value which are phase corrected, and a ground fault direction relay calculating means 300 for detecting the current change part as the ground fault current.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：通过检测接地故障电流和流向配电线路的过电流的三相电流互感器，通过高灵敏度的接地故障事件时间检测接地故障电流来减小设备的尺寸。检测分配系统的接地故障的装置包括第一和第二存储和保持装置305,304，其总是存储和保持在三相电力线上产生的线路电压303和零相电流302，几个周期部分，相位差检测装置307，用于通过从第一存储和保持装置取出线电压的一个周期部分的存储和保持值来获得线电压与当前值的相位差，通过接地故障过电压继电器检测零相电压301;相位校正装置308，用于通过使用相位差相位校正存储并保持在第二存储和保持装置中的零相电流值;零相电流差运算装置 309，用于通过任意地执行作为相位cor的零相电流值和当前检测值之间的差的计算来获得电流变化部分以及用于检测作为接地故障电流的电流变化部分的接地故障方向继电器计算装置300。版权所有（C）2005，JPO＆NCIPI

7. 发明专利

JP2003308751A Device for monitoring operating characteristic of switch 有权
标题翻译：用于监控开关操作特性的装置
公开(公告)号：JP2003308751A
公开(公告)日：2003-10-31
申请号：JP2002114726
申请日：2002-04-17
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KATO TATSURO , KONDO SHINICHI , ONO YASUNORI , KAWAMURA NAOTERU , FUJITA YASUNOBU
IPC分类号： H01H9/54
摘要： PROBLEM TO BE SOLVED: To correctly diagnose a sign of abnormality of operating characteristics of a switch.
SOLUTION: When a contact 50a is closed and a closing coil 10 is energized with responding to a closing command, a main contact of a breaker 1 is closed and an auxiliary b contact 30a is opened. Time from closure of the contact 50a to opening of the auxiliary b contact 30a is detected as a first action time T1 and time from opening of the auxiliary b contact 30a to closure of an auxiliary a contact 40a is detected by a measuring part 6 as a second action time T2 when closing action of the main contact of the breaker 1 is completed and the auxiliary a contact 40a is closed. The detection times T1, T2 are corrected by a diagnosis part 7 based on detection temperatures of each temperature sensor 5. Existence of abnormality of action times of the breaker 1 is judged by a judging part 8 with comparing corrected action times T1, T2 and fixed values as reference values of each action time.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：正确诊断开关的工作特性异常的征兆。解决方案：当触点50a闭合并且闭合线圈10响应于闭合指令被通电时，断路器1的主触点闭合，辅助触头30a打开。作为第一动作时间T1检测接触件50a的闭合到辅助触头30a的打开的时间，并且由辅助触头30a的打开到辅助触点40a的闭合的时间被测量部6检测为断路器1的主触头的闭合动作完成并且辅助触点40a闭合时的第二动作时间T2。检测时间T1，T2由诊断部7基于各温度传感器5的检测温度进行校正。断路器1的动作次数异常的判断由判定部8判定，校正动作时间T1，T2和固定值作为每个动作时间的参考值。版权所有（C）2004，JPO

8. 发明专利

JP2003061251A Power supply system 审中-公开
标题翻译：电源系统
公开(公告)号：JP2003061251A
公开(公告)日：2003-02-28
申请号：JP2001240501
申请日：2001-08-08
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ONO YASUNORI , TATEMI MASARU , KONDO SHINICHI , ARITA HIROSHI , SHIBATA YOUZOU , KANAI MINORU , KAWAMURA NAOTERU
IPC分类号： H02J15/00 , H01M8/00 , H02J3/28 , H02J3/38
CPC分类号： Y02E70/30
摘要： PROBLEM TO BE SOLVED: To provide a power supply system wherein much inexpensive nighttime power is received at ordinary customers and power demands which peak in the daytime are met.
SOLUTION: A hydrogen production unit 4, a hydrogen storage unit 5, a fuel battery 3, load monitors 21, and a monitoring controller 2 are installed on the premises 1 of a customer linked with a power system 100 of a general electric industry entity. Based on estimated demand for the next day estimated from the result of monitoring of the power consumption of loads, an amount of hydrogen to store is determined, and hydrogen is produced and stored using nighttime power. In the daytime, power is generated by the fuel battery 3 in correspondence with load fluctuation, and the amount of electricity purchased from the system 100 is thereby reduced.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：提供一种在普通客户接收到便宜的夜间电力的电力供应系统和满足白天峰值的电力需求。解决方案：在与通用电气工业实体的电力系统100连接的客户的房屋1中安装氢气产生单元4，氢气存储单元5，燃料电池3，负载监视器21和监视控制器2。根据监测负荷能耗结果估计的第二天的需求，确定存储的氢气量，并使用夜间电力产生和存储氢。白天，燃料电池3对应于负载波动产生电力，从而从系统100中购买的电量减少。

9. 发明专利

JP2008004373A Commutation type dc breaker 有权
标题翻译：通讯型直流断路器
公开(公告)号：JP2008004373A
公开(公告)日：2008-01-10
申请号：JP2006172467
申请日：2006-06-22
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SUZUKI SANETOSHI , MATSUDA YOSHIHIKO , WATANABE AKIHIKO , KAWAMURA NAOTERU , HAGA MASARU
IPC分类号： H01H33/59
摘要： PROBLEM TO BE SOLVED: To provide a commutation type DC breaker which can break promptly a main circuit current by generating a current zero point without increasing capacity and charging voltage of a commutating capacitor.
SOLUTION: Terminals 10A, 10B of a commutating capacitor 9 are installed at the lower part than the apex of the commutating capacitor and a terminal 14 of a main circuit is brought closer and connected to one of the terminals. With this structure, the length of connecting conductor to connect the commutating capacitor 9 and the main circuit can be made short and, to that extent, the inductance component from the commutating capacitor 9 to the main circuit can be reduced. Thereby, without increasing the capacity and charging voltage of the commutating capacitor 9, the current zero point can be generated promptly and the main circuit current can be cut off promptly.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种换向型直流断路器，其可以通过在不增加整流电容器的容量和充电电压的情况下产生电流零点来迅速地断开主电路电流。解决方案：整流电容器9的端子10A，10B安装在比换向电容器顶点的下部，主电路的端子14靠近并连接到一个端子。通过这种结构，可以缩短连接换向电容器9和主电路的连接导体的长度，从而可以减少从换向电容器9到主电路的电感分量。由此，在不增加换向电容器9的容量和充电电压的情况下，能够迅速地产生电流零点，能够及时切断主电路电流。版权所有（C）2008，JPO＆INPIT

10. 发明专利

JP2004192441A Equipment diagnostic system 审中-公开
公开(公告)号：JP2004192441A
公开(公告)日：2004-07-08
申请号：JP2002361007
申请日：2002-12-12
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ROKUNOHE TOSHIAKI , UCHIUMI TOMOAKI , ENDO FUMIMASA , KOJIMA KEIMEI , KATO TATSURO , KIDA JUNZO , KAWAMURA NAOTERU
IPC分类号： G05B23/02
摘要： PROBLEM TO BE SOLVED: To provide an equipment diagnostic system rationally diagnosing a diagnosis object. SOLUTION: When a dead time of an operating device exceeds a prescribed time, a necessity/non-necessity determination part 4 outputs an opening/closing command to a control circuit 20 based on the outputs of respective types of sensors and the output of a timer 42 incorporated in a circuit breaker 52, the control circuit 20 outputs a command to operate the circuit breaker to the operating device 26 and the circuit breaker 52 is forcedly opened/closed by operating the operating device 26. A diagnostic part 48 detects the operating frequency, the stroke characteristics, the temperature, circuit breaker turned on/off information and the control voltage as the situations at that time and diagnoses the soundness of the circuit breaker 52 based on the detection results. COPYRIGHT: (C)2004,JPO&NCIPI

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