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1. 发明专利

JPH0923566A AC OVERVOLTAGE PROTECTIVE RELAY 失效
公开(公告)号：JPH0923566A
公开(公告)日：1997-01-21
申请号：JP18814195
申请日：1995-06-30
申请人： TOKYO ELECTRIC POWER CO , HITACHI LTD , MITSUBISHI ELECTRIC CORP , TOSHIBA CORP
发明人： MAEDA TAKAFUMI , YAMAKAWA HIROSHI , TAKIGUCHI YUTAKA , USUI MASAJI , SAITO HIROSHI , SATO CHIKAO , KUROSAWA YASUHIRO , YAMAURA MITSURU
IPC分类号： H01C7/12 , H02H3/22 , H02H7/24 , H02H9/04
摘要： PURPOSE: To gain the most approximate value of the withstanding strength of a lighting arrester and thereby protect the device by making the precise measurement of energy of the arrester. CONSTITUTION: In an AC overvoltage protective relay that protects an arrester installed in a power system, the following means are installed; a means S1 for inputting a terminal voltage and an energizing current of the arrester, a means S2 for detecting a peak value of the terminal voltage for a specified period of time, a means S3 for calculating an integral value of the energizing current, a means S4 for calculating the absorbed energy of the arrester from the peak value of the terminal voltage and the integral value of the energizing current, a means S5 for determining whether the absorbed energy of the arrester exceeds a specified set value, and output means S6, S7 for making the output based on the result from the means S5.

2. 发明专利

JPH02164225A DIGITAL BUS PROTECTIVE RELAY 失效
公开(公告)号：JPH02164225A
公开(公告)日：1990-06-25
申请号：JP31897788
申请日：1988-12-16
申请人： MITSUBISHI ELECTRIC CORP , TOKYO ELECTRIC POWER CO
发明人： EDA NOBUO , USUI MASAJI , ANZAI TOSHIO , OURA YOSHIFUMI , MATSUZAWA KUNIO , YOSHIDA KAZUYOSHI
IPC分类号： H02H7/22
摘要： PURPOSE:To prevent malfunction even upon occurrence of extreme saturation of CT due to an external fault and to quicken the operation by employing a proportional differential system. CONSTITUTION:A digital bus protective relay comprises a differential element functionable for a differential current higher than a predetermined level, and proportional elements(A/D converter 5, RAM 6, ROM 7, CPU 8) for performing operation of ¦IT¦-(eta1¦ID¦+eta2¦IDt¦)>K2 (Where, eta1, eta2, K2 are constants, and IDt is a differential current based on sampling data preceding by 90 deg.) based on the absolute value ¦IT¦ of current proportional to the maximum value of secondary current flowing through current transformers 2-1-2-n for respective lines and the instantaneous value of the absolute value of the differential current, where the opera tional output of the differential element is locked for a predetermined time when the propor tional element is operating. Since the proportional elements are disabled upon occurrence of internal fault, terminal current ¦IT¦ is cancelled completely through the effect of the differen tial current ¦ID¦ or ¦IDt¦ and the operation is blocked. When large current penetrates through the differential element, upon occurrence of an external fault, to cause malfunction thereof, the proportional element functions completely to lock the final output. Since there is a predeter mined unsaturable interval even when a CT is saturated with a large current produced upon occurrence of external fault, the external fault is judged during this interval.

3. 发明专利

JPH06233448A ELECTRICAL SIGNAL INPUT DEVICE AND PROTECTIVE RELAY 失效
公开(公告)号：JPH06233448A
公开(公告)日：1994-08-19
申请号：JP1372393
申请日：1993-01-29
申请人： HITACHI LTD , TOKYO ELECTRIC POWER CO , TOSHIBA CORP , MITSUBISHI ELECTRIC CORP
发明人： WACHI ISAO , MAEDA TAKAFUMI , HORI MASAO , USUI MASAJI
IPC分类号： H02H3/28 , H02H7/22
摘要： PURPOSE:To make it possible to suppress series resonances produced in a signal transmission path connected to the secondary output terminal of an air-core transformer. CONSTITUTION:Braking resistors Ro-Rn are placed in signal transmission lines To-Tn connecting air-core transformers CT1-CTn and input auxiliary transformers Lo-Ln. If a series resonance occurs due to the secondary leakage reactance of the air-core transformers CT1-CTn, capacitors placed in the signal transmission lines To-Tn, or distributed capacitance, it is suppressed by the braking resistors Ro-Rn.

4. 发明专利

JP2011142709A Protective relay device 审中-公开
标题翻译：保护继电器
公开(公告)号：JP2011142709A
公开(公告)日：2011-07-21
申请号：JP2010000563
申请日：2010-01-05
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： USUI MASAJI
IPC分类号： H02H3/02
摘要： PROBLEM TO BE SOLVED: To provide a protective relay device capable of measuring a voltage of a faulty phase accurately. SOLUTION: The protective relay device includes a faulty phase determining unit 10, capable of outputting a faulty phase voltage 11 by determining a faulty phase from the voltages of three phases inputted from a power system; a healthy phase determining unit 12, which is provided parallel to the faulty phase determining unit 10 and is capable of outputting a healthy phase voltage 13, by determining a healthy phase from the voltages of the three phases; a reference electrical quantity creating unit 14, which creates a reference voltage 15 as a vector sum of healthy phase voltages 13 of the two phases when there exist two phases of the healthy phase voltages 13 outputted from the healthy phase determining unit 12; and an amplitude calculating 17, which calculates the amplitude of the faulty phase voltage 11 based on value obtained, by integrating an absolute value of the product of the faulty phase voltage 11 and the reference voltage 15 by a period of integral multiples of half cycles. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供能够精确地测量故障相位的电压的保护继电器装置。解决方案：保护继电器装置包括故障相位确定单元10，其能够通过从电力系统输入的三相电压确定故障相位来输出故障相电压11; 健康相位确定单元12，其通过从三相电压确定健康相位而与故障相位确定单元10平行设置并且能够输出健康相电压13; 参考电量产生单元14，当存在从健康相位确定单元12输出的健康相电压13的两相时，产生作为两相的健康相电压13的矢量和的参考电压15; 以及幅度计算器17，通过将故障相电压11和参考电压15的积的绝对值乘以半个周期的整数倍的周期，基于获得的值来计算故障相电压11的振幅。版权所有（C）2011，JPO＆INPIT

5. 发明专利

JP2011101518A Bus protection device 有权
标题翻译：总线保护装置
公开(公告)号：JP2011101518A
公开(公告)日：2011-05-19
申请号：JP2009254953
申请日：2009-11-06
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： USUI MASAJI
IPC分类号： H02H3/28 , H02H7/22
摘要： PROBLEM TO BE SOLVED: To provide a bus protection device for permitting a sound phase to stably hold a non-operation state, even if an error differential current is generated in the sound phase without an accident. SOLUTION: Bus protection devices 17a, 17b and 17c input a phase current from instrument current transformers (CT) 8a, 8b, 8c, 9 and 10 installed in respective phases of a plurality of lines connected to a bus and protect the bus. The bus protection devices include differential amount derivation circuits 16a, 16b and 16c for taking a vector sum of respective phase currents in respective lines, suppression amount derivation circuits 15a, 15b and 15c for taking a scalar sum of the respective phase currents, and a ratio differential arithmetic circuit 23b for performing a ratio differential operation by using differential current derived in the differential amount derivation circuit 16b of the self-phase, suppression current which is derived in the suppression amount derivation circuit 15b of the self-phase and suppression current which is derived by either of the suppression amount derivation circuits 15a and 15c of the other phase. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种允许声相稳定地保持非操作状态的总线保护装置，即使在没有事故的情况下在声相中产生误差差分电流也是如此。
解决方案：总线保护装置17a，17b和17c从安装在连接到总线的多条线路的相位中的仪表电流互感器（CT）8a，8b，8c，9和10输入相电流，并保护总线。总线保护装置包括差分量导出电路16a，16b和16c，用于获取各行中的各相电流的矢量和，用于获取各相电流的标量和的抑制量导出电路15a，15b和15c，差分运算电路23b，用于通过使用差分量导出电路16b中得到的差分电流来执行比率微分运算，该自相位抑制电流在抑制量导出电路15b中被导出为自相位和抑制电流由另一相的抑制量导出电路15a和15c中的任一个导出。版权所有（C）2011，JPO＆INPIT

6. 发明专利

JP2520269B2 失效
公开(公告)号：JP2520269B2
公开(公告)日：1996-07-31
申请号：JP27029087
申请日：1987-10-28
申请人： MITSUBISHI ELECTRIC CORP
发明人： USUI MASAJI
IPC分类号： H02H3/027

7. 发明专利

JPH08163769A DIGITAL PROTECTIVE RELAY 失效
公开(公告)号：JPH08163769A
公开(公告)日：1996-06-21
申请号：JP29852194
申请日：1994-12-01
申请人： MITSUBISHI ELECTRIC CORP
发明人： USUI MASAJI
IPC分类号： H02H3/02 , G01R19/04 , H02H3/05
摘要： PURPOSE: To provide a digital protective relay which is accurately activated even when the quantity of electricity is expressed by the trapezoidal waveform. CONSTITUTION: A digital protective relay is activated by detecting the 0-point where the quantity of electricity to be inputted by a 0-point detecting means 18 crosses the time base, and detecting the sum 23 of the square values of the amplitude obtained by a processing means from the 0-point to the point before the electrical angle of 90 deg. by a peak value detecting means 19.

8. 发明专利

JPH0582132B2 失效
公开(公告)号：JPH0582132B2
公开(公告)日：1993-11-17
申请号：JP4701987
申请日：1987-03-02
申请人： MITSUBISHI ELECTRIC CORP
发明人： USUI MASAJI
IPC分类号： H02H7/22

9. 发明专利

JPH023372B2 失效
公开(公告)号：JPH023372B2
公开(公告)日：1990-01-23
申请号：JP3538382
申请日：1982-03-05
申请人： MITSUBISHI ELECTRIC CORP
发明人： USUI MASAJI
IPC分类号： H02H7/045 , H02H3/02 , H02H3/05 , H02H3/28

10. 发明专利

JPS6380712A LINE SELECTION RELAY SYSTEM 失效
公开(公告)号：JPS6380712A
公开(公告)日：1988-04-11
申请号：JP22569786
申请日：1986-09-24
申请人： MITSUBISHI ELECTRIC CORP
发明人： USUI MASAJI
IPC分类号： H02H3/36

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