专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JP2000032670A SPOT NETWORK RECEIVING FACILITY 失效
公开(公告)号：JP2000032670A
公开(公告)日：2000-01-28
申请号：JP19419598
申请日：1998-07-09
申请人： TAKENAKA KOMUTEN CO , NISSIN ELECTRIC CO LTD
发明人： SUGIURA SHUJI , MIURA SHINJI , KOBAYASHI TAKUSHI , UEYAMA SHUJI , ODAWARA TADASHI
IPC分类号： H02H7/28 , H02J3/38
摘要： PROBLEM TO BE SOLVED: To provide a spot network receiving facility, where the network transformer of a conventional facility is eliminated and the receiving power of each line is directly distributed in the form of the receiving voltage. SOLUTION: Flow-limiting device 26A and 26B for supplying the receiving power of each line to a bus 27 by limiting the flow of a short-circuiting current, so that the short-circuiting protection cooperation with a power distribution system, including the network bus 27 at the downstream of receiving points 2A and 2B, and protector circuit breakers 10A and 10B can be made are provided, in place of the network transformer of each line. A facility is provided with capacitance parts 28A and 28B being provided between the bus side of the flow-limiting devices 26A and 26B and the ground. Next, the occurrence of such fault as the short-circuiting of the power system is detected with the charge voltage in the capacitance parts 28A and 28B as a voltage element, and directional relays (directional grounding relays 30A and 30B) for releasing the breakers 10A and 10B of the line of the fault system before system power failure are provided. Moreover, an inverse power, based on an inverse charge current from the bus 27 to the capacitance parts 28A and 28B is detected, and network relays 15A and 15B for opening the circuit breakers 10A and 10B of the line of the system that failed due to the power failure operation at the system side are provided.

2. 发明专利

JP2000032662A INCOMING/DISTRIBUTION EQUIPMENT 失效
公开(公告)号：JP2000032662A
公开(公告)日：2000-01-28
申请号：JP19419498
申请日：1998-07-09
申请人： TAKENAKA KOMUTEN CO , NISSIN ELECTRIC CO LTD
发明人： SUGIURA SHUJI , MIURA SHINJI , KOBAYASHI TAKUSHI , HORINOUCHI YASUJI , ODAWARA TADASHI
IPC分类号： H02H3/00 , H02J3/00
摘要： PROBLEM TO BE SOLVED: To eliminate an incoming transformer, which steps down an incoming voltage to a conventional intermediate voltage, such as 6.6 kV, etc., and a distribution unit with an intermediate voltage and distribute an incoming power with a voltage 20 kV grade directly, while equipment components are not required of an excessive current strength, and furthermore, the short-circuit protection coordination between the incoming point and a downstream distribution system is maintained. SOLUTION: A current limiter 19 which is connected to an incoming point 1 via an incoming breaker 4 and limits a short-circuit current, so as to maintain the short-circuit protection coordination between the incoming point 1 and a downstream distribution system and a distribution unit 20, in which distribution systems are formed and distribute a 20 kV-grade power through the current limiter 19 directly to the low voltage distribution transformers 27 of respective feeders 22 are provided. The 20 kV-grade power is stepped down by each transformer 27 to a low distribution voltage and then supplied to a load.

3. 发明专利

JPH0819173A SPOT-NETWORK RECEIVING INSTALLATION 失效
公开(公告)号：JPH0819173A
公开(公告)日：1996-01-19
申请号：JP16605294
申请日：1994-06-24
申请人： KANSAI ELECTRIC POWER CO , NISSIN ELECTRIC CO LTD
发明人： FUDO HIROYUKI , OUDA MITSUHIKO , GOKO YOSHINORI , ODA KANEMASA , ODAWARA TADASHI
IPC分类号： H02H7/28 , H02J3/04
摘要： PURPOSE:To obtain a spot-network receiving installation in which a maintenance and inspection operation is simplified by omitting a protector fuse for every bank in conventional cases, whose protection coordination is improved so as to continue a power supply to a load even when the short-circuit accident on the secondary side of a network transformer for any bank during the operation of two banks and whose supply reliability is enhanced remarkably in the case of a two-bank constitution. CONSTITUTION:A spot-network receiving installation is provided with primary switches 12a to 12c, for respective banks #1 to #3. which are installed across respective distribution lines 1a to 1c and respective network transformers 2a to 2c, with current transformers, for the respective banks #1 to #3, which are installed across secondary sides of the respective transformers 2a to 2c and respective protector breakers 5a to 5c and with overcurrent relays 14a to 14c, for the respective banks #1 to #3. which are operated by detecting the secondary short-circuit current of the respective current transformers 13a to 13c and which open the respective primary switches 12a to 12c.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式