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31. 发明专利

JPS5795129A DIRECTIONAL COMPARISON CARRIER RELAY 失效
公开(公告)号：JPS5795129A
公开(公告)日：1982-06-12
申请号：JP16806580
申请日：1980-12-01
申请人： TOKYO ELECTRIC POWER CO , HITACHI LTD
发明人： MATSUZAWA KUNIO , YOSHIDA AKIRA , SASAKI HIROSHI , YOSHIZAKI ATSUHIRO , IWATANI FUMIO
IPC分类号： H02H3/26

32. 发明专利

JPS55106018A DEVICE FOR MATCHING DIGITAL RELAY 失效
公开(公告)号：JPS55106018A
公开(公告)日：1980-08-14
申请号：JP1178279
申请日：1979-02-02
申请人： TOKYO ELECTRIC POWER CO , MEIDENSHA ELECTRIC MFG CO LTD
发明人： MATSUZAWA KUNIO , FURUSE MITSUYASU , YAMADA YUTAKA
IPC分类号： H02H3/02

33. 发明专利

JP2000041334A METHOD FOR ANALYZING DYNAMIC CHARACTERISTICS FOR REACTIVE POWER OF POWER SYSTEM 失效
公开(公告)号：JP2000041334A
公开(公告)日：2000-02-08
申请号：JP20772798
申请日：1998-07-23
申请人： NISSIN ELECTRIC CO LTD , TOKYO ELECTRIC POWER CO
发明人： KAMURA TSUTOMU , FUKUNAGA TETSUYA , MATSUZAWA KUNIO , NAKAO YUICHI
IPC分类号： H02J3/00 , G01R21/00 , G01R29/00 , H02J3/18
摘要： PROBLEM TO BE SOLVED: To more precisely analyze the dynamic characteristic of the reactive power of a power system with analysis of the dynamic characteristic by using an analyzing model for analyzing dynamic characteristic of reactive power which is set through correction using a C-term estimated value. SOLUTION: At the time of analyzing the reactive power Q at a load L, it is necessary to deduct the amount of the reactive power based on the charging capacity C of a system load connected in parallel with the load L. The amount of the reactive power is expressed, in such a way that the amount is proportional to the square of a step-like voltage change by giving the voltage change. In addition, the charging capacity C of the system load can be estimated by an arbitrary method, and the estimated value is called a C-term estimated value. Similarly, a load characteristic constant Ng of the reactive power can also be estimated by an arbitrary method. With the acquisition of the C-term estimated value and the load characteristic Ng of the reactive power, the dynamic characteristic of the reactive power Q is analyzed by using a reactive power characteristic analyzing model shown by the formula, where V0 and Vi respectively represent the voltage before and after making the step-like change and Vk, V', and Δt respectively represent the voltage when a k-th sample is collected during the step-like voltage change, the rated voltage, and intervals among measurement data.

34. 发明专利

JPH10124155A PRIMARY VOLTAGE DETECTING METHOD FOR TRANSFORMER, AND ITS APPARATUS 失效
公开(公告)号：JPH10124155A
公开(公告)日：1998-05-15
申请号：JP27427696
申请日：1996-10-17
申请人： TOKYO ELECTRIC POWER CO , MEIDENSHA ELECTRIC MFG CO LTD
发明人： OURA YOSHIFUMI , MATSUZAWA KUNIO , NAKAZAWA GENMARU , NOBATA TAKAHIRO , KUBOTA KENJI , NAKAO YUICHI , SAKAI YOSHITAKA , FUJIMOTO TOSHIRO
IPC分类号： G01R19/00 , G05F1/14 , H01F27/00 , H01F29/02 , H02H3/44
摘要： PROBLEM TO BE SOLVED: To detect primary side voltage lowering and a system voltage lowering phenomenon without the arrangement of PT, etc., on the transformer primary side by calculating the primary side voltage of a transformer through the use of a winding impedance, etc., corresponding to the detected secondary side voltage of the transformer, the current and the tap position signal. SOLUTION: Voltage V2 detected in the secondary side of the transformer, current I2 and the position signal from a tap change-over controller are respectively inputted to a bank primary voltage arithmetic part 12. The winding ratio at every tap position and the table of the impedance are previously prepared in a constant selecting part 21 inside the arithmetic part 12 and the inputted tap position signal refers to the table so as to select the winding wire ratio Nr and the winding wire impedance Zr corresponding to the position signal. A V1 -arithmetic circuit 27 obtains the primary side voltage V1 of the transformer through the use of the arithmetic equation by an arithmetic result which is corrected by a gain correction processing part 26 and the constants.

35. 发明专利

JPS63263939A SIGNAL SYNCHRONIZING SYSTEM 失效
公开(公告)号：JPS63263939A
公开(公告)日：1988-10-31
申请号：JP9734987
申请日：1987-04-22
申请人： TOKYO ELECTRIC POWER CO , HITACHI LTD , HITACHI CABLE , MITSUBISHI ELECTRIC CORP , TOSHIBA CORP
发明人： YOSHIDA KAZUYOSHI , MATSUZAWA KUNIO , MAEDA TAKAFUMI , SANO KAZUHIRO , SONE FUMIKI , TAKEDA KAZUHIKO , YOSHIDA TAKASHI , SHIOBARA YASUHISA
摘要： PURPOSE:To avoid the synchronizing error of a slave station from getting larger by setting a flag representing defect of synchronization in a synchronizing data frame when a master station cannot send a synchronizing data frame. CONSTITUTION:A master station 11 for synchronization sends idle data frames DSA and DSB prior to the transmission of a synchronizing data frame D1. The length of the idle data frame DSB is varied in response to the time when the master station 11 receives tokens T1-Tn. Moreover, when the master station 11 cannot send the synchronizing data frame D1 due to delay of token arrival or the like, a flag representing defect of synchronization is set to the data field of the synchronizing data frame D1. Slave stations 12-1n, in detecting the said flag, disregard the synchronizing data frame D1 as the synchronizing signal. Since the signal synchronization of the slave stations is maintained with high accuracy, the stable signal synchronization is attained by using a token passing bus.

36. 发明专利

JPS6356121A RATIO DIFFERENTIAL RELAY 失效
公开(公告)号：JPS6356121A
公开(公告)日：1988-03-10
申请号：JP19888786
申请日：1986-08-27
申请人： HITACHI LTD , TOKYO ELECTRIC POWER CO
发明人： SASAKI HIROSHI , KUDO HIROYUKI , YOSHIDA KAZUYOSHI , MATSUZAWA KUNIO
IPC分类号： H02H3/28

37. 发明专利

JPS6311018A RECLOSING DEVICE 失效
公开(公告)号：JPS6311018A
公开(公告)日：1988-01-18
申请号：JP15355386
申请日：1986-06-30
申请人： TOKYO ELECTRIC POWER CO , TOSHIBA CORP
发明人： MATSUZAWA KUNIO , OTSUKA HITOSHI , SATO MASAHIRO , KOMATA KAZUYA
IPC分类号： H02J3/04 , H02H3/06

38. 发明专利

JPS6277829A POWER SYSTEM STABILIZING SYSTEM 失效
公开(公告)号：JPS6277829A
公开(公告)日：1987-04-10
申请号：JP21671085
申请日：1985-09-30
申请人： TOKYO ELECTRIC POWER CO , TOSHIBA CORP
发明人： OURA YOSHIFUMI , MATSUZAWA KUNIO , OTSUKA HITOSHI , KOMATA KAZUYA
IPC分类号： H02J3/24

39. 发明专利

JPS6277022A POWER SOURCE BREAKER 失效
公开(公告)号：JPS6277022A
公开(公告)日：1987-04-09
申请号：JP21556885
申请日：1985-09-28
申请人： TOKYO ELECTRIC POWER CO , TOSHIBA CORP
发明人： OURA YOSHIFUMI , MATSUZAWA KUNIO , OTSUKA HITOSHI , YANAGIBASHI TAKESHI , KOMATA KAZUYA , SATO MASAHIRO
IPC分类号： H02J3/38 , H02J3/06

40. 发明专利

JPS58141632A POWER SYSTEM STABILIZER 失效
公开(公告)号：JPS58141632A
公开(公告)日：1983-08-23
申请号：JP2336182
申请日：1982-02-16
申请人： TOKYO ELECTRIC POWER CO , MITSUBISHI ELECTRIC CORP
发明人： MATSUZAWA KUNIO , KASAHARA TOSHIO , NISHIDA SHIYOUGO , TAKEDA SHIYOUICHI
IPC分类号： H02J3/24

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