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31. 发明专利

JP2001268773A POWER SYSTEM PROTECTION AND CONTROL DEVICE 失效
公开(公告)号：JP2001268773A
公开(公告)日：2001-09-28
申请号：JP2000072641
申请日：2000-03-15
申请人： TOSHIBA CORP , TOSHIBA SYST TECH
发明人： ISHIBASHI SATORU , SHIYOUNO TAKAYA , BABA IKURO
IPC分类号： H02H3/093 , H02H3/02
摘要： PROBLEM TO BE SOLVED: To obtain a power system protection and control device wherein it is unnecessary to calculate the mean value of the quantity of power again even after an input of quantity of power is interrupted and then restored. SOLUTION: The power system protection and control device comprises memory that sequentially converts analog quantities of power within a measuring period from the output side of a power cable into digital quantities of power and stores the results of conversion; an anomaly detector 15 that, when the input of digital quantities of power to the memory is interrupted and then restored, outputs a read-out command; a mean quantity of power calculating portion 5 that calculates the mean value for each measuring period based on the quantities of power stored in the memory; a data storing portion 8 that is capable of periodically storing the output of the mean quantity of power calculating portion 5 and, when a read-out command is outputted from the anomaly detector 15, reading out the next previous mean value of quantity of power and inputting it as the initial value of the mean quantity calculating portion 5; and an overload judging portion 6 that, when the mean value of quantity determined at the mean quantity of electricity calculating portion 5 exceeds a set point, judges that an object to be protected or controlled is under overload.

32. 发明专利

JPH09198127A AUTOMATIC INSPECTION DEVICE FOR CONTROLLER 失效
公开(公告)号：JPH09198127A
公开(公告)日：1997-07-31
申请号：JP6383496
申请日：1996-01-19
申请人： TOSHIBA CORP
发明人： ISHIBASHI SATORU
IPC分类号： G05B23/02
摘要： PROBLEM TO BE SOLVED: To obtain an automatic inspection device smoothly executing inspection by alarming and correcting to an adequate time when the set value of next inspection time is inadequate. SOLUTION: When the primary value of next inspection time set by a next inspection time setting means 2 is not proper, an alarming means 8 alarms. In addition when the primary value of next inspection time set by a next inspection time setting means 2 is inadequate, a next inspection time correction means 9 corrects the next inspection time to an adequate time and stores it in a next inspection time storing means 3. Therefore the operator knows the setting of inadequate next inspection time and an automatic inspection starting means 4 outputs an automatic inspection start signal to an inspection circuit 7 based on the corrected next inspection time and automatically inspects a controller.

33. 发明专利

JPH0993796A PROTECTION CONTROL DEVICE FOR ELECTRIC POWER SYSTEM 失效
公开(公告)号：JPH0993796A
公开(公告)日：1997-04-04
申请号：JP26942395
申请日：1995-09-22
申请人： TOSHIBA CORP
发明人： ISHIBASHI SATORU
IPC分类号： H02H3/05 , H02H6/00
摘要： PROBLEM TO BE SOLVED: To easily further quickly and surely perform confirmation of a transmission part and an arithmetic part in a protection control device and a data delivery test between the protection control device and a data receiving device. SOLUTION: A protection control device 1 fetches an input data 2 of voltage information, current information, equipment information, etc., in an electric power system from an input part 3, and performs conversion calculation or the like from the input data 2 to a transmission data 6 in an arithmetic part 4. In the case of switching a changeover switch 8 to a side of the arithmetic part 4, its result is transmitted to a data receiving device 12 from a transmission part 5. In the case that the changeover switch 8 remains switched to the side of a simulation data 7, the simulation data 7 built in the protection control device 1 is input to the transmission part 5 to be transmitted therefrom to the data receiving device 12. In this way, even in the case that the input data 2 can not be fetched by the protection control device 1, a fixed value can be transmitted as a data to the data receiving device 12 from the transmission part 5.

34. 发明专利

JPH07147725A POWER DISTURBANCE DETECTION RELAY 失效
公开(公告)号：JPH07147725A
公开(公告)日：1995-06-06
申请号：JP29580893
申请日：1993-11-26
申请人： TOSHIBA CORP
发明人： ISHIBASHI SATORU
IPC分类号： H02H3/48 , H02J3/24
摘要： PURPOSE:To provide a power disturbance detection relay which does not operate at the time of a failure in a power system but operates at the time of a system disturbance. CONSTITUTION:A power flow variation detecting unit 12 and a power continuation deciding unit 13 are provided. The power flow detecting unit 12 compares the present power flow value of a power system with the power flow value a first designated time, longer than the current continuation time at the time of a failure in a power system, before. If the difference exceeds a designated value, the power flow detecting unit 12 generates a detection output. If the output of the power flow detecting unit 12 continues for a time longer than a second designated time which is longer than the failure current continuation time at the time of the failure in the power system and shorter than a half of a power disturbance period, the power continuation deciding unit 13 generates a relay output.

35. 发明专利

JPH05137263A SYSTEM STABILIZER 失效
公开(公告)号：JPH05137263A
公开(公告)日：1993-06-01
申请号：JP29108691
申请日：1991-11-07
申请人： TOSHIBA CORP
发明人： ISHIBASHI SATORU
IPC分类号： H02J3/24
摘要： PURPOSE:To stabilize a power system after a generator is cut off by selecting such a generator as to gain the stabilized state easily because an end-to-end phase difference between a main system and a group of generators after the generator is cut off becomes smaller than the one before the generator is cut off or other reasons when one group of generators becomes unstable due to an accident on a transmission line in the power system and therefore either of the generators should be cut off. CONSTITUTION:When selecting a generator (1G-3G) to be cut off, such a generator is selected (15) that an end-to-end phase difference between a main system 2 and a group of the generators 1G-3G after the generator is cut off becomes smaller than the one before the generator is cut off and thereby the system can gain a stable state easily. In this system, devices 16, 17, 18 for selecting the above mentioned generator and cutting it off are provided.

36. 发明专利

JPH05137262A SYSTEM STABILIZER 失效
公开(公告)号：JPH05137262A
公开(公告)日：1993-06-01
申请号：JP29108591
申请日：1991-11-07
申请人： TOSHIBA CORP
发明人： ISHIBASHI SATORU
IPC分类号： H02J3/24
摘要： PURPOSE:To provide a system stabilizer which does not make a false step-out estimation even if the total power of a generator of a system targeted for protection rapidly changes when a trouble of the system targeted for protection is eliminated and thereby a phase angle difference between the system targeted for protection and a main system fails to be continuous. CONSTITUTION:The system targeted for protection is to be separated from the main system when the following two conditions are satisfied: (1) a phase angle difference between the system targeted for protection and the main system is a specified value or above (2) an estimated value of a phase angle difference between these two systems is a specified value or above.

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