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

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

JPH09191559A DIGITAL PROTECTIVE RELAY 失效
公开(公告)号：JPH09191559A
公开(公告)日：1997-07-22
申请号：JP227596
申请日：1996-01-10
申请人： TOKYO ELECTRIC POWER CO , TOSHIBA CORP
发明人： YABE KUNIAKI , KODA JUN , MAEDA TAKAFUMI , YAMAKAWA HIROSHI , YAMAURA MITSURU , SATO CHIKAO , NAKANO SATOSHI , HORI MASAO
IPC分类号： G01R19/25 , H02H3/28 , H02H7/045
摘要： PROBLEM TO BE SOLVED: To provide a digital protective relay which is not actuated by an exciting inrush current but actuated by a failure such as one inside a transformer, even in a transformer of electric power system which contains harmonic current near the second harmonic in a current on an internal failure. SOLUTION: As an amount which represent a dispersion (flatness) of N instantaneous values im to im-( N-1) in a fixed section of a cycle of differential current calculated by placing elements with terminals to be protected in between and using each phase's alternating current, a deviation value is obtained by dividing by N the total value of the Nth power (x=1, 2,..., x) of the difference between each instantaneous value and the average value of N instantaneous values. Provided are a second examining means 21, 22, which examines whether or not the deviation value so obtained is equal to a fixed value or less to produce an output when it is equal to a fixed value or less, and an excited inrush current dealing element 23, which has a reset delaying means to delay the reset of the output of the second examining means 21, 22 for a given period of time. The output of the excited inrush current dealing element 23 prevents the output of a differential protective element 5.

3. 发明专利

JPH114533A DIGITAL PROTECTION RELAY 失效
公开(公告)号：JPH114533A
公开(公告)日：1999-01-06
申请号：JP17327097
申请日：1997-06-12
申请人： TOKYO ELECTRIC POWER CO , TOSHIBA CORP
发明人： YABE KUNIAKI , KODA JUN , YAMAKAWA HIROSHI , YAMAURA MITSURU , NAKANO SATOSHI , SATO CHIKAO , HORI MASAO
IPC分类号： G01R19/04 , G01R19/165 , H02H3/28 , H02H7/045
摘要： PROBLEM TO BE SOLVED: To obtain a digital protection relay functioning surely in response to a failure in a transformer by blocking the output from a differential protection element using the output from an excitation inrush current countermeasure element having means for delaying the reset of the output from a decision means by a specified time thereby preventing the differential protection element surely from acting with the excitation inrush current of the transformer. SOLUTION: A differential relay 1 comprises an amplitude operating section 21, a flatness deciding section 22, a reset delay timer 23 and an excitation inrush current countermeasure element 61. A differential current Id operated at the differential current operating section 14 of a differential element 5 is introduced to the excitation inrush current countermeasure element 61 and the amplitude J is determined at the amplitude operating section 21 by performing an operation for detecting the amplitude. When it is lower than a specified value k, the flatness deciding section 22 produces an output. On the other hand, output from the reset delay timer 23 is inverted through a NOT operating circuit 19 and ANDed, through an SND circuit 20, with an output from the differential element 5 in order to block the output from the differential element 5 operating with an excitation inrush current thus preventing erroneous action of the differential relay 1.

4. 发明专利

JPH09205724A GROUNDING DISTANCE RELAYING APPARATUS 失效
公开(公告)号：JPH09205724A
公开(公告)日：1997-08-05
申请号：JP1122296
申请日：1996-01-25
申请人： TOKYO ELECTRIC POWER CO , TOSHIBA CORP
发明人： MAEDA TAKAFUMI , YAMAKAWA HIROSHI , SATO MAKOTO , SAITO HIROSHI
IPC分类号： G01R31/02 , H02H3/40
摘要： PROBLEM TO BE SOLVED: To realize highly accurate distance calculation of a fault point by calculating distance to a fault point using an inverse phase current or difference of inverse phase current as the polarity amount on the basis of a current and zero-phase current, inverse phase current of self line or difference of inverse phase current before and after fault and system voltage of self end. SOLUTION: A current Ip and zero phase current Io of self line are detected by a self line current detecting means 31 based on an output current of a current transformer 23 and an inverse phase current In of self line is also detected by means of a self line inverse phase current detecting means 32. Moreover, a phase voltage Va of self end is detected by means of a voltage detecting means 33 on the basis of an output voltage of a transformer 24 for gauge. Based on each detected output, a grounding fault point calculating means 34 calculates a reactance corresponding to distance up to the fault point from the setting point of a relay 30 to obtain the ground distance by the arithmetic expression using an inverse phase current In as the polarity amount. Thereby, the grounding fault in the electrical station near the power source end which is always not easily influenced by a load current can be detected quickly.

5. 发明专利

JPH07222345A OVERCURRENT RELAY 失效
公开(公告)号：JPH07222345A
公开(公告)日：1995-08-18
申请号：JP3102694
申请日：1994-02-02
申请人： TOKYO ELECTRIC POWER CO , TOSHIBA CORP
发明人： MAEDA TAKAFUMI , YAMAKAWA HIROSHI , SEKIGUCHI KATSUHIKO , WATABE YOJI
IPC分类号： H02H3/093
摘要： PURPOSE:To realize highly accurate and correct interruption of load by operating the temperature rise of an object to be protected using the coefficients and constants of a specific function and detecting the temperature rise higher than a predetermined level thereby facilitating the setting operation. CONSTITUTION:A function determining means 14 determines a function h(I, t) of current I and time (t), simulating the current and time vs temperature rise characteristics of an object 1 to be protected, by setting one or more current values Ii and times ti (i is an integer) as variables. A temperature rise operating means 12 operates temperature rise of the object 1 using the coefficients and constants of the function I, t) thus determined. An output decision means 13 decides that the temperature operated by the temperature rise operating means 12 is higher than a predetermined level and delivers an output. This constitution facilitates the setting work and realizes a highly accurate and correct interruption of load.

6. 发明专利

JPH10322887A GROUNDING DISTANCE RELAY 失效
公开(公告)号：JPH10322887A
公开(公告)日：1998-12-04
申请号：JP12974497
申请日：1997-05-20
申请人： TOKYO ELECTRIC POWER CO , TOSHIBA CORP , TOSHIBA SYST TECH KK
发明人： MAEDA TAKAFUMI , YAMAKAWA HIROSHI , SAITO HIROSHI , KUROSAWA YASUHIRO , AMO HIDEYA
IPC分类号： G01R31/08 , H02H3/38 , H02H3/40 , H02H7/26
摘要： PROBLEM TO BE SOLVED: To provide a grounding distance relay that cannot be affected by a load current and a fault point resistance, even if the relay is applied to a high-resistance grounding system. SOLUTION: When a first means 11 calculates a reverse phase current, and at the same time a second means 12 detects a grounding fault phase when distance to a fault point is calculated by introducing the voltage and current of a power system, the phase difference between a reference voltage where the level and phase of third means 13, 14, and 15 do not change even by a ground accident and a reverse phase current that is calculated by a first means 11 is calculated before and after the fault accident is detected, and at least the reverse phase current and phase before the grounding accident is detected, are retained. Further, fourth means 16 and 17 calculate the phase change content of the reverse phase current caused by a load current and a fault point resistance based on the reverse phase current after the fault accident and the reverse phase current and the phase difference before the fault accident occurs and then the phase difference after the grounding fault occurs and then phase-shifts the reverse phase current after the grounding accident according to the phase change content as the amount of polarity. Based on the amount of polarity, a range-finding operation means 18 calculates the distance to the fault point.

7. 发明专利

JPH0837726A GROUND FAULT DETECTING RELAY 失效
公开(公告)号：JPH0837726A
公开(公告)日：1996-02-06
申请号：JP17424194
申请日：1994-07-26
申请人： TOKYO ELECTRIC POWER CO , TOSHIBA CORP
发明人： MAEDA TAKAFUMI , YAMAKAWA HIROSHI , SATO MAKOTO , KUROSAWA YASUHIRO
IPC分类号： H02H3/34 , H02H3/28
摘要： PURPOSE:To detect the ground fault of a transmission line with high sensitivity by only using the instrument transformer of its own system by performing ground fault detection and discrimination when the AND condition of outputs from an opposite-phase voltage detecting means and zero-phase voltage detecting means is met. CONSTITUTION:An opposite-phase voltage detecting section 11, the sensitivity of which is adjusted so that it can become lower than that of another opposite- phase voltage detecting section 13, immediately detects a ground fault when the absolute value of the opposite-phase voltage across its terminals becomes larger than a fixed value and a zero-phase voltage detecting section 12, the sensitivity of which is adjusted so that it can become lower than that of another zero-phase detecting section 14, immediately detects a ground fault having a large fault-point resistance when the absolute value of the zero-phase voltage across its terminals becomes larger than a fixed value. A ground fault discriminating section 17 discriminates the ground fault when one of the sections 11 and 13 and sections 12 and 14 detects fault. Therefore, ground faults can be detected with high reliability.

8. 发明专利

JPH10327529A DIGITAL GROUND-FAULT DISTANCE RELAY 失效
公开(公告)号：JPH10327529A
公开(公告)日：1998-12-08
申请号：JP14863797
申请日：1997-05-22
申请人： TOKYO ELECTRIC POWER CO , TOSHIBA CORP
发明人： MAEDA TAKAFUMI , YAMAKAWA HIROSHI , KUROSAWA YASUHIRO
IPC分类号： H02H3/40
摘要： PROBLEM TO BE SOLVED: To prevent the occurrence of a reactance measuring error even when the ratio of the actual resistance portion of the line constant of a transmission line to the reactance of the line is different, by calculating the voltage drop from an accident point to the installed point of a ground-fault distance relay which occurs due to a one-line ground-fault accident by resolving the voltage drop into the α-component and zero component of its own line and the zero component in other phases. SOLUTION: Six equations are set up including m=kj (j=1-6) as an arbitrary time series, and unknowns Rα , R0 , R0 ', Lα , L0 , and L0 ' are calculated by means of an 8th means 18. An 8a-th means 18A discriminates whether or not the inductance of, for example, an α-component is smaller than a set value by using the value of the unknowns and, when the inductance is smaller than the set value, the means 18A discriminates that operations are conducted and the conventional reactance relay can be realized. Therefore, a digital ground-fault distance relay which can be measured and separated with accuracy even when higher harmonics, etc., are superposed when an accident happens can be realized.

9. 发明专利

JPH0819169A PROTECTIVE RELAYING SYSTEM 失效
公开(公告)号：JPH0819169A
公开(公告)日：1996-01-19
申请号：JP17326694
申请日：1994-07-01
申请人： TOKYO ELECTRIC POWER CO , TOSHIBA CORP
发明人： MAEDA TAKAFUMI , YAMAKAWA HIROSHI , ANDO FUMIO , YAMAURA MITSURU , KUROSAWA YASUHIRO
IPC分类号： H02H3/40 , H02H3/44
摘要： PURPOSE:To obtain a protective relaying system which is not affected by the high frequency of a fault voltage and a fault current by a method wherein pieces of sampling data on a voltage and a current for a power system are input respectively to two filters whose transfer function is different, outputs at a time tm and a time tm-p are put into a specific expression and a reactance value is found so as to compare its magnitude with a settling value. CONSTITUTION:Sampling values Vm, im of a voltage and a current for a power system are input to two filters 1, 2 whose transfer function is different,respective voltage outputs Vsm, Vjm and current outputs ism, ijm at a time tm and respective voltage outputs Vsm-p, Vjm-p and current outputs ism-p, ijm-p at a time tm-p are input to a reactance computation device 3, a reactance value Xm is computed on the basis of an expression, and it is sent to an operation judgment device 4 so as to be compared with a settling value Xs. When Xm

10. 发明专利

JP2011101453A Method and device for evaluating protective relay system 审中-公开
标题翻译：用于评估保护继电器系统的方法和装置
公开(公告)号：JP2011101453A
公开(公告)日：2011-05-19
申请号：JP2009252890
申请日：2009-11-04
申请人： Tokyo Electric Power Co Inc:The , 東京電力株式会社
发明人： SAKAI MITSURU , YAMAKAWA HIROSHI , KUMANO HIROYUKI , OKAMURA HIROSHI
IPC分类号： H02H3/05 , G01R31/00
摘要： PROBLEM TO BE SOLVED: To facilitate evaluating whether protective relay operations are sound as a whole, even if a current transformer is saturated. SOLUTION: A current detected by a current transformer 15 for detecting a current flowing in a power electric wire is input to a protective relay 16, and an operation signal is output to a trip circuit 17 when an accident is determined by accident determination. When the current transformer 15 of a protective relay system for opening a circuit breaker 13d according to a trip command from the trip circuit 17 has such characteristics that it is saturated to the maximum accident current, a simulated saturation accident current simulating a detection signal of the current transformer 15 when the current transformer 15 is saturated to the maximum accident current is input to the protective relay 16. Operation time from an input of the simulated saturation accident current to the protective relay 16 to an output of a trip command from the trip circuit 17 is measured, and it is evaluated that the protective relay system is sound when the operation time is within a prescribed predetermined time. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：即使电流互感器饱和，为了便于评估保护继电器操作是否整体声音。解决方案：用于检测在电力电线中流动的电流的电流互感器15检测到的电流被输入到保护继电器16，并且当事故由事故确定确定时，将操作信号输出到跳闸电路17 。当根据来自跳闸电路17的跳闸命令打开断路器13d的保护继电器系统的电流互感器15具有饱和到最大事故电流的特性时，模拟饱和事故电流的模拟饱和事故电流将电流互感器15饱和到最大事故电流的电流互感器15输入到保护继电器16.从模拟饱和事故电流输入到保护继电器16到从跳闸电路的跳闸命令的输出的操作时间 17，并且当操作时间在规定的预定时间内时，评估保护继电器系统是否良好。版权所有（C）2011，JPO＆INPIT

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