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1. 发明专利

JP4285720B2 Substation distribution line breaker open detection method and apparatus 有权
公开(公告)号：JP4285720B2
公开(公告)日：2009-06-24
申请号：JP2001037330
申请日：2001-02-14
申请人：東京電力株式会社 , 株式会社ダイヘン
发明人：修治三宅 , 忠士栗山 , 隆橋本 , 尚明深津 , 一朗炭谷 , 信行藤原
IPC分类号： H02B3/00 , H02H7/28 , H02B7/06 , H02H3/00 , H02H3/40

2. 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.

3. 发明专利

JPH11313438A FAULT PROTECTION DEVICE FOR POWER DISTRIBUTION SYSTEM 失效
公开(公告)号：JPH11313438A
公开(公告)日：1999-11-09
申请号：JP7861799
申请日：1999-03-23
申请人： ELECTRIC BOAT CORP
发明人： DUBA GREG A , THAXTON EDGAR S , WALTER JOHN
IPC分类号： H02H7/22 , H02H3/06 , H02H7/26 , H02H7/28 , H02H7/30 , H02J3/38 , H02J13/00
摘要： PROBLEM TO BE SOLVED: To enable a power source connected to a bus, which is not affected by fault to continuously transmit electric power by opening the accompanying circuit breaker and an appropriate load line switch and closing the faulty load line and a circuit breaker for power supply line, when a load line fault controller recognizes the fault. SOLUTION: When one of load line fault controllers 32a, and so on receives a fault detecting signal from one of load line fault detectors 30a, and so on, the controller 32a transmits a signal to the power supply line fault controller 24a, and so on connected with the bus 1, to which the faulty load line is connected. The power supply line fault controller 24a stops the power supply to the faulty load line group, by opening the corresponding circuit breaker 26a. When all the power supply lines receive signals indicating that all the lines are open, the power supply line fault controller 24a opens the corresponding switch 28a, and so on under a no-load condition. When the switch 28a is opened, the corresponding load line fault controller 32a supplies electric poser to the bus 16 and a non-faulty load line 20a, and so on, by transmitting a signal to the power supply line fault controller 24a and closing the corresponding circuit breaker 26 and so on.

4. 发明专利

JPH11308762A NETWORK RELAY 失效
公开(公告)号：JPH11308762A
公开(公告)日：1999-11-05
申请号：JP12821798
申请日：1998-04-22
申请人： TOKYO ELECTRIC POWER CO , TOSHIBA CORP
发明人： SUMIYA ICHIRO , FUKATSU NAOAKI , KURODA NOBUSUKE , TAMURA SHIGERU , HORI MASAO , MIYAZAKI MASATAKA , YAMAURA MITSURU , TAKEDA AKIRA
IPC分类号： H02H7/28 , H02J3/38
摘要： PROBLEM TO BE SOLVED: To correctly judge whether the reverse power is at a consumer terminal or at a main and back-up load system at the time when a breaker of a transformer station for a power supply is opened, by discriminating the consumer terminal reverse power detection characteristics of a spot network system by using the line power or a quantity of electricity obtained by subtracting the average power from the line power. SOLUTION: A line power calculating means 421 calculates the effective power Pi and reactive power Q1 for each line from each line current and line voltage. Then, an average power calculating means 422 calculates the average power of all the lines obtained by the line power calculating means 421. Then, a discrimination power judging means 423 calculates the discrimination power for earth line constituted of a difference between the power obtained by the line power calculating means 421 and the average power obtained by the average power calculating means 422, and then a reverse power judging means 424a applies the discrimination powers to the operating conditions for five relay elements to judge whether the power is reverse power or not. By this method, the reverse power at the consumer terminal and the reverse power at a main and back-up load system at the time when a power supply terminal is opened can be discriminated from each other.

5. 发明专利

JPH11215688A GROUNDING DETECTOR FOR DISTRIBUTION SYSTEM, AND POWER RECEIVING AND DISTRIBUTING FACILITY USING THE GROUNDING DETECTOR 失效
公开(公告)号：JPH11215688A
公开(公告)日：1999-08-06
申请号：JP1536598
申请日：1998-01-28
申请人： TOKYO ELECTRIC POWER CO , DAIHEN CORP
发明人： SUMIYA ICHIRO , KURODA NOBUSUKE , HASHIMOTO TAKASHI , ENDO ATSUSHI , KURIYAMA TADASHI , INUI MASAHIRO
IPC分类号： H02H7/28 , H02H3/34
摘要： PROBLEM TO BE SOLVED: To detect the grounding accident on the side of high-voltage distribution cable, with the circuit on low voltage side of a transformer for power reception, by detecting the reverse-phase components of the fundamental wave of a three-phase AC current detected with a three-phase AC detector, and judging the existence of the occurrence of the grounding accident from this reverse-phase components. SOLUTION: When it is judged that a grounding accident has occurred in any of high-voltage distribution cables 3a-3c by grounding judgers provided at network protectors 4Ga-4Gc, breaker controller 4Ea-4Ec give breakers 4Da-4Dc breaking commands. For example, when the high-voltage distribution cable 3a is cut off the bus 1B1 of a substation 1, the protector breaker 4Da opens to cut off the circuit on high voltage side and the circuit on low voltage side of the transformer 4Ba from each other because the grounding judger of the breaker controller 4Ea detects a grounding accident occurring in the high-voltage cable 3a. As a result, this system can prevent the tidal current of reverse power from occurring on the side of high-voltage distribution cable 3a from side of other sound distribution cables 3a and 3c.

6. 发明专利

JPH08317550A SPOT NETWORK POWER RECEIVING EQUIPMENT 失效
公开(公告)号：JPH08317550A
公开(公告)日：1996-11-29
申请号：JP12135195
申请日：1995-05-19
申请人： MITSUBISHI ELECTRIC CORP
发明人： SHIMAZU ISAO
IPC分类号： H02H7/28
摘要： PURPOSE: To obtain a spot network power receiving equipment capable of applying a general-purpose relay as a relay for detecting a trouble circuit by reducing the overall dimensions of the equipment. CONSTITUTION: A network transformer 14 is equipped having primary windings N2 more than the number of at least secondary windings N11 to N13 , a plurality of circuits 1, 7 and 8 are pulled out of a substation and are respectively branched and connected through respective load switches 18a to 20a to respective primary windings N1 to N13 of the network transformer 14 and are connected to buses to which the loads of the secondary windings N2 are connected.

7. 发明专利

JPH08251811A SPOT NETWORK 失效
公开(公告)号：JPH08251811A
公开(公告)日：1996-09-27
申请号：JP4964795
申请日：1995-03-09
申请人： TOSHIBA CORP
发明人： FUKUDA SHINICHIRO
IPC分类号： H02H7/28
摘要： PURPOSE: To obtain a spot network in which a fault generation position can be cut off from a power-supply passage by a method wherein a fuse, for reverse- current prevention, whose cutoff characteristic is close to that of a protective fuse is interposed and inserted in a position near a network bus. CONSTITUTION: When a short circuit or a ground fault is generated in a point B between a protect circuit breaker 10a in a supply line 4a and a fuse 14a for reverse-current prevention, a forward current I which is supplied from the side of a power-supply cable 1a exceeds a rated current IR so as to be increased to a fault current IS, and a protective fuse 8a or the protective circuit breaker 10a is cut off. In addition, a reverse current via a network bus 5 from other normal supply lines 4b, 4c flows to a fault generation point A via the fuse 14a for reverse-current prevention. In this case, since a reverse fault current which flows to the fault generation point B becomes 21S, the fuse 14a for reverse-current prevention is cut off after the time required for its cutoff has elapsed.

8. 发明专利

JPH07336882A POWER RECEIVING DEVICE FOR NETWORK POWER DISTRIBUTION SYSTEM 失效
公开(公告)号：JPH07336882A
公开(公告)日：1995-12-22
申请号：JP13267894
申请日：1994-06-15
申请人： FUJI ELECTRIC CO LTD , KANSAI ELECTRIC POWER CO
发明人： ISOZAKI MASARU , GANJI TAKASHI , NAKAMURA OSAMU
IPC分类号： H02H7/28
摘要： PURPOSE:To improve the reliability of power distribution by interrupting failure currents due to a failure such as ground, a line-to-line short circuit, etc., generated in a network power distribution system and quickly reclosing. CONSTITUTION:Current-limiting breakers 314, 324, 334 consisting of semiconductor breakers are adopted as network protectors for power receivers 310, 320, 330 connecting network buses 1 and network power distribution systems 2. The current-limiting breaker limits currents before failure currents reach a peak and turns a circuit off when the failure currents are generated. Reclosing is enabled only by generating an on-command signal from the outside, thus allowing reclosing immediately after the failure currents are interrupted.

9. 发明专利

JPH07241029A SPOT NETWORK POWER RECEIVING FACILITY 失效
公开(公告)号：JPH07241029A
公开(公告)日：1995-09-12
申请号：JP5288194
申请日：1994-02-24
申请人： NISSIN ELECTRIC CO LTD
发明人： HORINOUCHI YASUJI , HATANO YASUTSUGU , IINUMA MASAAKI
IPC分类号： H02H7/28
摘要： PURPOSE:To realize reduction in size, weight and cost of a spot network power receiving facility receiving power from three distribution lines by reducing the capacity of network bus. CONSTITUTION:A network bus 9 is formed into a loop comprising a power supply side bus 10 connecting network transformers 3a-3c in parallel on the secondary thereof, two coupling buses 11, 12 led out from between the joints of the bus 10 and the secondaries of the transformers 3a-3c, and a load side bus 13 connected, at the opposite ends thereof, with the coupling buses 11, 12 and feeding power to the loads connected therewith.

10. 发明专利

JPH07193992A PROTECTIVE SYSTEM FOR DIFFERENT BUS SUPPLY LOOP TRANSMISSION SYSTEM 失效
公开(公告)号：JPH07193992A
公开(公告)日：1995-07-28
申请号：JP33046993
申请日：1993-12-27
申请人： TOKYO ELECTRIC POWER CO , MEIDENSHA ELECTRIC MFG CO LTD
发明人： MAEDA TAKAFUMI , YAMAGUCHI HIROSHI , FUJIMOTO TOSHIRO
IPC分类号： H02H7/26 , H02H3/36 , H02H7/22 , H02H7/28
摘要： PURPOSE:To prevent unnecessary interruption of a transmission line due to the effect of fault occurring on another transmission line in a loop transmission system for feeding power to a load through a different bus which can be disconnected upon occurrence of a fault. CONSTITUTION:When a fault occurs at point A outside a loop system and main protection fails at point B to cause a fault current If(BD) to flow into a bus connection line, a bus connection relay BD functions to trip a corresponding circuit breaker 10 for the bus connection line. At the same time, an operation signal delivered from the bus connection relay BD causes a loop relay 11 to function and a circuit breaker 12 to be controlled is tripped to open a power feed out line. When an open point is present on the loop system because of the fault therein, the loop relay 11 is provided with relevant information and tripping of the circuit breaker 12 is disabled. Fault current flowing through a loop transmission line is detected through a detection relay built in the loop relay without relying on the function of the relay BD and then the circuit breaker 12 is tripped.

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