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29 条记录 (耗时 0.013 秒)

    Method of and device for protecting electrical power system
    2.
    发明公开
    Method of and device for protecting electrical power system 失效
    Verfahren und Vorrichtung zum Schutz elektrischer Energienetze。

    公开(公告)号：EP0474186A2

    公开(公告)日：1992-03-11

    申请号：EP91114839.3

    申请日：1991-09-03

    申请人： HITACHI, LTD. ,  CHUBU ELECTRIC POWER COMPANY INC.

    发明人： Morita, Masao ,  Ueda, Toshiaki ,  Kurosawa, Yukio ,  Arita, Hiroshi ,  Yamagiwa, Tokio

    IPC分类号： H02H3/02 ,  H02H7/30

    CPC分类号： H02H7/30 ,  F02B2075/027 ,  H02H3/025

    摘要： An electrical power system protection device has a main circuit including a circuit breaker 1 and a switch 2 connected in series to the circuit breaker 1, the main circuit being connected to a power line 115. The protection device also has a current limiting element 4 connected in parallel to the circuit breaker 1. When the level of electrical current flowing in the power line 115, detected by a current detector 7, has exceeded a predetermined first set level, a first over-current detector 8 delivers immediately a trip command to the circuit breaker. AS a consequence, any fault current such as a short-circuit current is commutated to the current limiting element 4 so as to be limited, whereby any drop of voltage in the power line upstream of the circuit breaker is greatly suppressed. When a state in which a predetermined second set level is exceeded by the detected current level is continued beyond a predetermined period, a second over-current detector 9 delivers an off command to the switch 2, thus protecting upstream portion of the power line against the fault in this power line 115. Preferably, the current level after the limitation is set to fall within a range of current which activates a momentary element of an over-current relay (OCR) 127 of a receiving end breaker 122 of a downstream sub-system, e.g., a consumer's sub-system 120, connected to the power line 115. In the event of a fail;ure in the downstream power line 120, the receiving end breaker 115 is tripped without delay so that the sound portion of the power line is reset to normal state of operation, thus achieving a harmonized protection of the electrical power system.

    摘要翻译： 电力系统保护装置具有包括断路器1和与断路器1串联连接的开关2的主电路，主电路连接到电力线115.保护装置还具有连接的限流元件4 与电路断路器1并联。当由电流检测器7检测到的在电力线115中流动的电流的电平已经超过预定的第一设定电平时，第一过电流检测器8立即将跳闸命令提供给 断路器。 结果，诸如短路电流之类的任何故障电流都被转换到限流元件4，从而受到限制，从而极大地抑制断路器上游的电力线中的任何电压下降。 当预定的第二设定电平被检测到的电流电平超过的状态持续超过预定时段时，第二过电流检测器9向开关2发送关断命令，从而保护电源线的上游部分抵抗 优选地，限制之后的电流水平被设定为在激活下游子系统115的接收端断路器122的过电流继电器（OCR）127的瞬时元件的电流范围内， 系统，例如连接到电力线115的消费者子系统120.在失败的情况下，在下游电力线120中，接收端断路器115没有延迟地跳闸，使得电力的声音部分 线路复位到正常工作状态，从而实现电力系统的协调保护。

    Hot water boiling apparatus
    3.
    发明公开
    Hot water boiling apparatus 失效

    公开(公告)号：EP0309199A3

    公开(公告)日：1990-08-08

    申请号：EP88308704.1

    申请日：1988-09-20

    申请人： CHUBU ELECTRIC POWER COMPANY INC. ,  KABUSHIKI KAISHA TOSHIBA

    发明人： Kurachi, Yasuhiko ,  Mori, Kazumi ,  Koizumi, Hisao c/o Patent Division

    IPC分类号： F24H1/18 ,  F24H9/12

    CPC分类号： F24H1/185 ,  F24H9/122

    摘要： A hot water boiling apparatus includes a hot water tank (11) filled with water. A water supply pipe (14) and a hot water supply pipe (17) are connected to the bottom and top of the tank, respectively. A bubble pump unit (20) is arranged in parallel with the tank. The pump unit includes a body (27) having a boiling chamber (67), electric heaters (24a, 24b) for heating the water in the chamber, a first connecting pipe (30) for guiding water from the tank to the body, a guide pipe (36) for feeding the water, guided through the first connecting pipe, into the boiling chamber, and a second connecting pipe (33) for guiding the water heated in the boiling chamber into the upper portion in the tank. The guiding pipe is arranged so that heat is exchanged between the water in the boiling chamber and the water flowing through the guide pipe.

    Power system stabilizer
    4.
    发明公开
    Power system stabilizer 失效
    电力系统稳定器

    公开(公告)号：EP0231528A3

    公开(公告)日：1989-09-13

    申请号：EP86118145.1

    申请日：1986-12-30

    申请人： The Chubu Electric Power Company, Inc. ,  MITSUBISHI DENKI KABUSHIKI KAISHA

    发明人： Hasegawa, Taizou ,  Ono, Hirotaka ,  Koda, Isao ,  Gouda, Tadahiro c/o Mitsubishi Denki K.K. ,  Oshida, Hideharu c/o Mitsubishi Denki K.K. ,  Narita, Toshiharu c/o Mitsubishi Denki K.K.

    IPC分类号： H02J3/12

    CPC分类号： H02J3/14 ,  Y02B70/3225 ,  Y04S20/222

    摘要： A power system stabilizer is provided at an individual power system to be separated due to an accident cutting off a link line which interconnects a numoer of power systems to form a large-scale power system. Said power systems inc!ude oower stations such as power plants and transformer substations. A simplified arithmetic processing unit of the stabilizer performs an arithmetic processing by a simple linear equation using an output frequency of a representative power station belonging to the separated power system immediately after the accident has been cleared, so that a total load drop of the separated power system can be assumed. Based on the assumption amount, balance control of demand and supply in the separated system is made.

    摘要翻译： 电力系统稳定器设置在单独的电力系统中，由于事故切断了连接线路，该电力系统连接若干个电力系统以形成大规模电力系统。 所述电力系统包括诸如发电厂和变电站之类的电站。 稳定器的简易算术处理单元在事故清除后立即使用属于分离式电力系统的代表性电站的输出频率通过简单的线性方程式执行算术处理，使得分离的电力的总负载下降 系统可以假定。 基于假设量，对分离系统的需求和供给进行平衡控制。

    Lightning arrester insulator
    5.
    发明公开
    Lightning arrester insulator 失效
    避雷器绝缘体。

    公开(公告)号：EP0103454A1

    公开(公告)日：1984-03-21

    申请号：EP83305169.1

    申请日：1983-09-06

    申请人： CHUBU ELECTRIC POWER COMPANY INC. ,  MITSUBISHI DENKI KABUSHIKI KAISHA ,  NGK INSULATORS, LTD.

    发明人： Mitsumatsu, Yoshio ,  Kamio, Akio ,  Seike, Shoji ,  Nozaki, Masayuke No. 13-46, Aza Kakiba

    IPC分类号： H01C7/12 ,  H01T4/02

    CPC分类号： H01C7/12 ,  H01T4/02

    摘要： A lightning arrester insulator in which a voltage non-linear resistor 2 having a major constituent of zinc oxide is integrally fixed in a longitudinal bore in the insulator 1 by a layer 3 of an inorganic adhesive agent which is interposed between an outer surface of the resistor and an inner wall surface of the insulator defining the longitudinal bore. A contact angle 0 of the adhesive agent layer defined by each and face thereof and an associated end part of the inner wall surface is held within a range of 10 to 60 degrees. To establish the contact angle, at least one of the end face of the adhesive agent layer and the associated end part of the inner wall surface of the insulator is inclined with respect to the longitudinal centerline of the longitudinal bore. Each end surface of the voltage non-linear resistor is spaced from the corresponding end of the adhesive agent layer axially inwardly along the longitudinal centerline of the longitudinal bore.

    Hot water boiling apparatus
    8.
    发明公开
    Hot water boiling apparatus 失效
    热水锅炉

    公开(公告)号：EP0309198A3

    公开(公告)日：1990-08-01

    申请号：EP88308702.5

    申请日：1988-09-20

    申请人： CHUBU ELECTRIC POWER COMPANY INC. ,  KABUSHIKI KAISHA TOSHIBA

    发明人： Kurachi, Yasuhiko ,  Mori, Kazumi ,  Koizumi, Hisao c/o Patent Division

    IPC分类号： F24H1/18 ,  F24H1/14

    CPC分类号： F24H1/142 ,  F24H1/185

    摘要： A hot water boiling apparatus includes a hot water storage tank (11). The storage tank has an inner tank (12) storing water therein, an outer tank (13) surrounding the inner trank, and a vacuum heat insula­tion layer (14) defined between the inner and outer tanks and surrounding the inner tank. A water flow type heating unit (22) is arranged outside the storage tank and used for drawing water from the inner tank through a water supply port (15) formed at the bottom of the inner tank and, after heating the water, supplying it into the inner tank through a hot water supply port (18) formed at the top of the inner tank. The unit includes a con­necting pipe (30, 33) one end of which is liquid tightly connected to the water supply port and passes through the outer tank in airtight fashion, and the other end of which is liquid tightly connected to the hot water supply port and passes through the outer tank in air­tight fashion.

    Power system stabilizer
    9.
    发明公开
    Power system stabilizer 失效
    Energieversorgung系统稳定器。

    公开(公告)号：EP0231528A2

    公开(公告)日：1987-08-12

    申请号：EP86118145.1

    申请日：1986-12-30

    申请人： The Chubu Electric Power Company, Inc. ,  MITSUBISHI DENKI KABUSHIKI KAISHA

    发明人： Hasegawa, Taizou ,  Ono, Hirotaka ,  Koda, Isao ,  Gouda, Tadahiro c/o Mitsubishi Denki K.K. ,  Oshida, Hideharu c/o Mitsubishi Denki K.K. ,  Narita, Toshiharu c/o Mitsubishi Denki K.K.

    IPC分类号： H02J3/12

    CPC分类号： H02J3/14 ,  Y02B70/3225 ,  Y04S20/222

    摘要： A power system stabilizer is provided at an individual power system to be separated due to an accident cutting off a link line which interconnects a numoer of power systems to form a large-scale power system. Said power systems inc!ude oower stations such as power plants and transformer substations. A simplified arithmetic processing unit of the stabilizer performs an arithmetic processing by a simple linear equation using an output frequency of a representative power station belonging to the separated power system immediately after the accident has been cleared, so that a total load drop of the separated power system can be assumed. Based on the assumption amount, balance control of demand and supply in the separated system is made.

    摘要翻译： 在单个电力系统处提供电力系统稳定器，由于事故切断了将多个电力系统互连以形成大规模电力系统的连接线，从而被分离。 所述电力系统包括发电厂，如发电厂和变电所。 稳定器的简化算术处理单元通过简单的线性方程式，使用属于分离的动力系统的代表性发电站的输出频率，在事故清除后立即进行运算处理，从而分离的功率的总负载下降 系统可以假定。 根据假设量，分离系统的需求和供给平衡控制。