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

JPH02114819A PROTECTIVE RELAY 失效
公开(公告)号：JPH02114819A
公开(公告)日：1990-04-26
申请号：JP26857088
申请日：1988-10-25
申请人： MITSUBISHI ELECTRIC CORP , TOKYO ELECTRIC POWER CO
发明人： KASHIWAMORI WATARU , SUZUKI MAKOTO , MATSUZAWA KUNIO , YOSHIDA KAZUYOSHI
IPC分类号： H02H7/04 , H02H3/40 , H02H7/045
摘要： PURPOSE:To prevent erroneous function due to excitation surge current by comparing the impedance phase operated from basic wave components of system voltage and current with the impedance phase operated from higher harmonic components thereof. CONSTITUTION:Data containing information of higher harmonics of system voltage V and current 1 during system fault or upon application of exciting surge are fed to a basic wave impedance phase operating section 16 and a second higher harmonic impedance phase operating section 17. Operating sections 16, 17 extract only relevant frequency components and operate impedance phases at those frequencies then they are outputted. A judging section 18 compares the impedance phase between the basic wave and the secondary higher harmonic, and if the difference is within + or -90 deg. it is judged that the system is faulty and no inhibit signal is outputted. Consequently, an inhibit circuit 22 opens and the interruption signal for another protective relay 20 is fed to a circuit breaker. If the phase difference is not within + or -90 deg., the judging section 18 judges application of exciting surge and produces an inhibit signal 19. Consequently, erroneous function is prevented upon application of exciting surge resulting in reliable protection.

2. 发明专利

JPS60164265A GROUND FAULT POINT LOCATOR 失效
公开(公告)号：JPS60164265A
公开(公告)日：1985-08-27
申请号：JP2016484
申请日：1984-02-06
申请人： MITSUBISHI ELECTRIC CORP
发明人： SUZUKI MAKOTO , KOTANI GENZABUROU , KASHIWAMORI WATARU
IPC分类号： G01R31/08
摘要： PURPOSE:To make the equipment simple and inexpensive by measuring the distance to a fault point from voltage and current information in the power system. CONSTITUTION:A positive voltage component at the set point of a locator in the sound operation is inputted into an input terminal 101. A zero current component is inputted into an input terminal 102 while the zero voltage component at the set point of the locator inputted into an input terminal 103. A positive phase current component is inputted into an input terminal 105 to memorize positive phase currents IL and IF in the sound operation and at the fault into a memory circuit 107. An integration circuit 108 integrates outputs of the input terminal 101 and an arithmetic circuit 104. An arithmetic circuit 109 computes output of the memory circuit 107 and output from a power source voltage. Components of the arithmetic circuit 104 and the memory 107 are inputted into an integration circuit 110. An arithmetic circuit 113 divides the output of an addition circuit 111 by the output of an addition circuit 112 to compute the distance (x) to a fault point and outputs the results to an input terminal 114.

3. 发明专利

JPH0510632B2 失效
公开(公告)号：JPH0510632B2
公开(公告)日：1993-02-10
申请号：JP2016384
申请日：1984-02-06
申请人： MITSUBISHI ELECTRIC CORP
发明人： SUZUKI MAKOTO , KOTANI GENZABURO , KASHIWAMORI WATARU
IPC分类号： G01R31/08

4. 发明专利

JPS60164264A GROUND FAULT POINT LOCATOR 失效
公开(公告)号：JPS60164264A
公开(公告)日：1985-08-27
申请号：JP2016384
申请日：1984-02-06
申请人： MITSUBISHI ELECTRIC CORP
发明人： SUZUKI MAKOTO , KOTANI GENZABUROU , KASHIWAMORI WATARU
IPC分类号： G01R31/08
摘要： PURPOSE:To make the equipment simple and inexpensive by measuring the distance to a fault point from affected current and voltage generated in the power system when a ground fault occurs in one line. CONSTITUTION:An arithmetic circuit 104 computes Lkm (total length of parallel two lines), Z0A (zero phase impedance of the first line) and ZR0 (impedance obtained by addition of zero phase impedance XTR behind the power receiving side and neutral resistance 3RNR) to obtain LZ0A+ZR0. An arithmetic circuit 105 computes L, Zm (mutual impedance between circuits) and ZR0 to obtain LZm+ZR0. An arithmetic circuit 106 computes L, Z0B (zero impedance of the second line) and ZR0 and outputs LZ0B+ZR0. An addition circuit 111 adds a zero phase voltage V0, at the set point of a fault point locator and outputs of integration circuits 107 and 108. An addition circuit 112 adds V0 and outputs of integration circuits 109 and 110. An arithmetic circuit 113 computes outputs of the addition circuits 111 and 112 and the arithmetic circuits 104 and 105 and a division circuit 115 divides the output of the arithmetic circuit 113 by the output of an arithmetic circuit 114 to output the distance to a ground fault point.

5. 发明专利

JPS60164262A GROUND FAULT POINT LOCATOR 失效
公开(公告)号：JPS60164262A
公开(公告)日：1985-08-27
申请号：JP2016184
申请日：1984-02-06
申请人： MITSUBISHI ELECTRIC CORP
发明人： SUZUKI MAKOTO , KOTANI GENZABUROU , KASHIWAMORI WATARU
IPC分类号： G01R31/08
摘要： PURPOSE:To make the equipment simple and inexpensive by measuring the distance to a fault point from affected current and voltage generated in a power line when a fault occurs. CONSTITUTION:In case of a fault in the first line, a fault detector connects a change-over switch 104 to the upper position. As a result, the output of an integration circuit 106 gives L(Z0+Zm)I02 derived from information of Lkm from a memory unit 105 and zero phase impedance Z0 from the system conditions and information of mutual impedance Zm between circuits and zero phase current I02 of the second line introduced through the change-over switch 104. Then, an integration circuit 107 provides ZROI01, ZR0I02 and 2ZR0I02 derived from information of impedance ZR0 obtained by addition of zero phase impedance XTR behind the power receiving side and neutral resistance 3RNR on the power receiving side and the phase zero current I01 in the first line and that I02 in the second line. Addition circuits 108 and 109 input outputs of components derived from the integration circuits 106 and 107 and components derived from an input terminal 103 into an arithmetic circuit 110 and output the distance (x) to a fault point to an output terminal 111.

6. 发明专利

JPH10248158A WIDE-AREA SYSTEM PROTECTION RELAY AND DEVICE FOR AUTOMATIC RECOVERY FROM CIRCUIT BREAKER FAILURE 失效
公开(公告)号：JPH10248158A
公开(公告)日：1998-09-14
申请号：JP5076297
申请日：1997-03-05
申请人： MITSUBISHI ELECTRIC CORP , KANSAI ELECTRIC POWER CO
发明人： KATAYAMA YOSHIHIRO , TOTSU YURI , KASHIWAMORI WATARU , FUJIYAMA WATARU , TANAKA KOICHI , SHIMANO SHINJI , YOSHIMI MASASHI
IPC分类号： H02H3/28 , H02H3/38 , H02H3/40 , H02H7/26
摘要： PROBLEM TO BE SOLVED: To minimize a range of interruption and identify a failure block, by installing a failure block judging means which identifies a failure block based on the result of detection by a failure detector which is installed in each protection block defined by dividing a power system into minimum interruption blocks, and isolating a failure block identified by the failure block judging means from the power system. SOLUTION: A line protection block 51 contains failure detectors 41, 22, 49, and protects a transmission line 5, and a line protection block 52 contains failure detectors 43, 44, and protects a transmission line 6. Further, a line protection block 53 contains failure detectors 45, 46, 50, and protects a transmission line 7, and a line protection block 54 contains failure detectors 47, 48, and protects a transmission line 8. The results from the failure detectors 41-50 at terminals, collected for each line protection block are judged by a failure block judging means corresponding to the line protection blocks to detect a failure block. Then the failure block is isolated from the power system by an isolation command outputting means.

7. 发明专利

JP2513069B2 失效
公开(公告)号：JP2513069B2
公开(公告)日：1996-07-03
申请号：JP18010190
申请日：1990-07-05
申请人： MITSUBISHI ELECTRIC CORP
发明人： USUI MASAJI , KASHIWAMORI WATARU , OHATA AKIO
IPC分类号： H02H3/02

8. 发明专利

JPH01173877A DIGITAL PROTECTION RELAY 失效
公开(公告)号：JPH01173877A
公开(公告)日：1989-07-10
申请号：JP33343487
申请日：1987-12-28
申请人： MITSUBISHI ELECTRIC CORP
发明人： SUZUKI MAKOTO , KASHIWAMORI WATARU
IPC分类号： G01R19/04 , G01R19/25 , H02H3/02 , H02H3/08
摘要： PURPOSE:To find an amplitude value with high accuracy at the time of variation in frequency and to improve the performance of the protection relay greatly by squaring three successive sampling values, multiplying only the 2nd value by two, and calculating the sum of them. CONSTITUTION:When the amplitude value of the protection relay at the time of about + or -5% variation in the frequency of the quantity of AC electricity is calculated, the three successive sampling values 1-3 are used and squared by a squaring means 9-11, and only the 2nd value is multiplied by two by a doubling arithmetic means 20. Their results are summed up by an adding means 17 to find the sum, which is divided by two by a dividing means 22; and a square root arithmetic means 19 finds the square root. Consequently, this operation is 3/8 times as fast as arithmetic operation which uses eight samples conventionally and an error value is improved in accuracy from -3.8-+3.6% to -0.3-+0.3% to improve the performance of the protection relay greatly.

9. 发明专利

JPS61214719A DISTANCE RELAY 失效
公开(公告)号：JPS61214719A
公开(公告)日：1986-09-24
申请号：JP5417985
申请日：1985-03-20
申请人： MITSUBISHI ELECTRIC CORP
发明人： SUZUKI MAKOTO , KOTANI GENZABURO , KASHIWAMORI WATARU
IPC分类号： H02H3/40

10. 发明专利

JPH0879964A LINE SELECTION RELAY 失效
公开(公告)号：JPH0879964A
公开(公告)日：1996-03-22
申请号：JP20886694
申请日：1994-09-01
申请人： MITSUBISHI ELECTRIC CORP
发明人： FUJIWARA SHUHEI , KASHIWAMORI WATARU
IPC分类号： H02H3/40 , H02H3/36
摘要： PURPOSE: To stabilize a final output operation by judging a first operation for constituting moh characteristics and outputting a judgment result based on the logic sum of the operation judgment result of the first judgment part and the operation judgment result of the second judgment part for constituting rear offset moh characteristics. CONSTITUTION: A first judgment part 9 constitutes moh characteristics for executing the inner-product operation between the output of a first operation vector operation part 7 and that of a first reference vector operation pot 8 and performing judgment based on whether the operation result is positive or negative. A second judgment part 12 constitutes rear offset moh characteristics for executing the inner-product between the output of a second operation vector operation part 10 and that of a second reference vector operation part 11 and for performing judgment based on whether the operation result is positive or negative. Then, after the operation judgment of the first judgment part 9, a final output is determined based on the judgment result according to the logic sum of the operation judgment result of the first and second judgment parts 9 and 12, thus stabilizing the final output.

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