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51. 发明专利

JP2004364376A Ground distance relay 有权
公开(公告)号：JP2004364376A
公开(公告)日：2004-12-24
申请号：JP2003157832
申请日：2003-06-03
申请人： Tm T & D Kk , ティーエム・ティーアンドディー株式会社
发明人： ODA SHIGETO
IPC分类号： H02H3/40 , H02H3/38
摘要： PROBLEM TO BE SOLVED: To provide a ground distance relay capable of preventing overreach resulting from incorrect distance measurement of the sound phase in case of single phase fault due to zero-phase compensation on the occurrence of ground fault. SOLUTION: The distance relay performing zero-phase compensation individually for the resistance component and the inductance component by receiving the voltage and current from a power system comprises a means 21 for detecting a minimum voltage phase by receiving a three-phase voltage, a means 22 for deciding a negative-phase current phase having a smallest vector phase difference from a zero-phase current by receiving a three-phase negative-phase current and a zero-phase current, and a phase match decision means 23 for deciding a fault phase based on the outputs from the minimum voltage phase detecting means and the phase decision means wherein zero-phase compensation of the resistor component and the inductance component is carried out only for the fault phase. COPYRIGHT: (C)2005,JPO&NCIPI

52. 发明专利

JP3605963B2 Relay device 失效
公开(公告)号：JP3605963B2
公开(公告)日：2004-12-22
申请号：JP25338296
申请日：1996-09-25
申请人：富士電機機器制御株式会社
发明人：敏和高島 , 俊介鹿野
IPC分类号： G01R31/02 , G01R29/16 , H02H3/38

53. 发明专利

JP3550125B2 Transmission line fault monitoring device 有权
公开(公告)号：JP3550125B2
公开(公告)日：2004-08-04
申请号：JP2001384536
申请日：2001-12-18
申请人：ニシム電子工業株式会社
发明人：英樹城野 , 和則杉町 , 宏典高橋
IPC分类号： G01R31/08 , H02H3/36 , H02H3/38 , H02H7/26

54. 发明专利

JP3515345B2 Direction distance relay 失效
公开(公告)号：JP3515345B2
公开(公告)日：2004-04-05
申请号：JP33953297
申请日：1997-12-10
申请人：九州電力株式会社 , 株式会社明電舎
发明人：祐史北村 , 溢泰古瀬 , 俊章松井 , 英行栗林 , 哲哉笹野 , 敏朗藤本
IPC分类号： H02H3/38 , H02H3/40

55. 发明专利

JP2003529307A Equipment to stop the single-phase asynchronous motor with phase-shift capacitor 有权
公开(公告)号：JP2003529307A
公开(公告)日：2003-09-30
申请号：JP2001571526
申请日：2001-03-23
申请人：ソムフィ
发明人：ブルーノ，セルジュ
IPC分类号： B60J1/17 , B60J7/057 , H02H3/38 , H02H7/085 , H02P3/18
CPC分类号： H02H3/38 , H02H7/085
摘要： (57)【要約】本発明は、モータの負荷が所定値を超えたときにモータを停止する装置に関する。それは、所定トルク変化に対応する位相シフト・コンデンサの端子間電圧における変化を、生成される最大トルクに関わらず、選択電圧変化へと変換する手段(Ｄ１、ＤＺ、Ｒ１、Ｒ２)と、変換電圧(Ｕ
B )を基準電圧と比較する手段(Ｔ１)と、変換電圧が基準電圧より低いときにモータを停止する手段と、を備える。

56. 发明专利

JP2003235153A DIRECTION COMPARING DISTANCE RELAY APPARATUS 审中-公开
公开(公告)号：JP2003235153A
公开(公告)日：2003-08-22
申请号：JP2002029768
申请日：2002-02-06
申请人： TOSHIBA CORP , TOSHIBA SYST TECH
发明人： KASE TAKAHIRO , SONOBE YASUTAKA , AMO HIDEYA
IPC分类号： H02H3/26 , H02H3/08 , H02H3/38 , H02H3/40 , H02H7/26
摘要： PROBLEM TO BE SOLVED: To prevent a three-phase trip that can be caused by a short-circuit distance relay if source phases fail simultaneously or with a time difference at the closest front end and the closest rear end of a relay installation point, i.e., a progressing accident occurs, even when the internal failure is a single- phase failure. SOLUTION: The direction comparing distance relay apparatus is provided with a direction distance relay that determines, when a failure occurs in a system being protected, if the failure is ahead or behind using the transformer installation point as the reference, and a short-circuit distance relay that calculates the measured distance from the current and voltage and determines if the failure occurs within the scope to be protected; it is further provided with a progressing accident detection apparatus that determines the occurrence of a progressing accident when a ground fault direction element ahead operates by one phase and a direction element behind operates by one or more phases. The operation of this progressing accident detection apparatus prevents tripping on its own breaker-terminal breaker based on the short-circuit distance relay while at the same time prevents transmission of a trip permitting signal to the other end. COPYRIGHT: (C)2003,JPO

57. 发明专利

JP2003194863A POWER SWING DETECTING METHOD AND DEVICE FOR ELECTRIC POWER SYSTEM 审中-公开
公开(公告)号：JP2003194863A
公开(公告)日：2003-07-09
申请号：JP2001368520
申请日：2001-12-03
申请人： UNIV NIHON
发明人： SATO MASAHIRO
IPC分类号： G01R25/00 , G01R29/18 , H02H3/38 , H02H3/48 , H02J3/24 , H02J3/38
摘要： PROBLEM TO BE SOLVED: To provide a power swing detecting device for an electric power system capable of surely detecting the power swing generated among a group of power generators at both sides of a connection line of the electric power systems regardless of a specific phase angle difference. SOLUTION: This power swing detecting device 6 for the electric power system comprises an analogue/digital converter 7 for taking the voltage V and the electric current I of an electric feed line 3 of the electric power system 1a, an average value calculating means 96 for calculating average values of the voltage and the electric current in a predetermined zone to a judgment time on the basis of the voltage and the current, a maximum and minimum values determining and storing means for determining and storing a maximum value and a minimum value of the average values of the voltage and the current, a phase angle difference operating means 98 for calculating the phase angle difference on the basis of the voltage and the current, and a power swing determining means 101 for judging the power swing when the average value of the measured voltage is within a constant range on the minimum value of the stored average value of the measured voltage, and within a constant range on the maximum value of the stored average value of the electric current, in a case when it is judged that the phase angle difference is over 90 degrees. COPYRIGHT: (C)2003,JPO

58. 发明专利

JP3400365B2 失效
公开(公告)号：JP3400365B2
公开(公告)日：2003-04-28
申请号：JP32759498
申请日：1998-11-18
IPC分类号： G01R31/08 , H02H3/38

59. 发明专利

JP3378418B2 Leakage protection scheme 失效
公开(公告)号：JP3378418B2
公开(公告)日：2003-02-17
申请号：JP25836595
申请日：1995-10-05
申请人：光商工株式会社
发明人：達哉村田 , 耕次汲田
IPC分类号： H02H3/16 , H02H3/347 , H02H3/38

60. 发明专利

JP2002238165A METHOD AND APPARATUS FOR DETECTING OPEN STATE OF CIRCUIT- BREAKER OF DISTRIBUTION LINE IN SUBSTATION 失效
公开(公告)号：JP2002238165A
公开(公告)日：2002-08-23
申请号：JP2001037331
申请日：2001-02-14
申请人： TOKYO ELECTRIC POWER CO , DAIHEN CORP
发明人： SUMIYA ICHIRO , FUJIWARA NOBUYUKI , FUKATSU NAOAKI , OKUDA KATSUNORI , TAMURA TORU , HASHIMOTO TAKASHI
IPC分类号： H02H3/38 , H02J3/38
摘要： PROBLEM TO BE SOLVED: To provide an open detecting method for a circuit-breaker of distribution lines of a substation for detecting open state of a circuit-breaker of distribution lines in a substation, on the side of the receiving distribution facilities of a network. SOLUTION: Effective powers P1-P3, reactive powers Q1-Q3, effective power variations ΔP1-ΔP3, reactive power variations ΔQ1-ΔQ3 detected on the secondary sides of the network transformers NTr1-NTr3 of the receiving distributing facilities of the network, and primary voltage variations ΔV1-ΔV3 of the transformers, discriminant functions which give the relations between these input variables, and output values are formed using neural network technology, inputting as input variables. Output values of the discriminant functions are computed, with respect to the input variables measured in the receiving distributing facilities, and detection whether circuit-breakers FCB1-FCB3 for distribution lines are disconnected is performed form the computed output values.

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