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81. 发明专利

JP2890373B2 失效
公开(公告)号：JP2890373B2
公开(公告)日：1999-05-10
申请号：JP1839693
申请日：1993-02-05
申请人： OOSAKA GASU KK , FUJI DENKI KK
发明人： MATSUBARA TETSUHIKO , YOKOTA JUNICHI , IKI HIROYUKI , MURAYAMA HIROSHI
IPC分类号： H02H3/38 , H02P9/00 , H02P9/04

82. 发明专利

JPH118930A INSTRUMENT FOR MEASURING INFORMATION ON CURRENT APPLICATION TO CIRCUIT BREAKER 失效
公开(公告)号：JPH118930A
公开(公告)日：1999-01-12
申请号：JP5174698
申请日：1998-03-04
申请人： MITSUBISHI ELECTRIC CORP
发明人： MAKIMOTO MITSUHIRO , YAMAZAKI HARUHIKO , KAWAMURA MASANORI , KANETAKA SHIYUUKO , SAKATA MINORU , TSUCHIMOTO YUJI
IPC分类号： G01R19/00 , H01H73/00 , H02H3/34 , H02H3/38
摘要： PROBLEM TO BE SOLVED: To obtain the value of circuit voltage, power, quantity of power, etc., which is supplied to load as current application information by calculating the current and the voltage detected by the current transformer and the transformer within a circuit breaker, and converting the current value, the voltage value, the power value, and the quantity of power into signal output capable of indicating the information. SOLUTION: A current transformer 18 and a transformer 19 for measurement are accommodated in the main body 1 of a circuit breaker, and the current flowing to each conductor 2 separately from the current transformer 4 for overcurrent detection and the voltage (interphase voltage) between the conductors 2 are detected. A maximum current value storage circuit 24 stores and retains the maximum current value Imax. A multiplying circuit 25 which multiplies the outputs of a current A/D conversion circuit 21 and a voltage A/D conversion circuit 22 obtains the output corresponding to the output V of the voltage between the phases and the next, and a multiplying circuit 26 obtains that corresponding to a power W of the load. The outputs from the multiplying circuit 27 are added up into a quantity Wh of power. These outputs are inputted into a display 29 via an indication content selecting means 28. Thus, information on the current, the interphase voltage, and power, the quantity of power, etc., can be obtained from the information on the current supply and current application.

83. 发明专利

JPH10336883A METHOD AND DEVICE FOR DETECTING OUT-OF-STEP OF POWER SUPPLY SYSTEM 失效
公开(公告)号：JPH10336883A
公开(公告)日：1998-12-18
申请号：JP133098
申请日：1998-01-07
申请人： TOSHIBA CORP
发明人： SATO MASAHIRO
IPC分类号： G01R21/00 , G01R21/133 , G01R25/00 , G01R27/02 , H02H3/38 , H02H3/48 , H02J3/06 , H02J3/24 , H02J3/38 , H02J3/40
摘要： PROBLEM TO BE SOLVED: To accurately judge out-of-step without setting a zone and using a special transmission means. SOLUTION: Voltge and current are measured at the terminal of a transmission line 3 for closely connecting generator groups 11 and 12 , at the same time, the measured voltage and current are used for calculating a phase angle difference by a phase angle difference operation means 17, furthermore, the phase angle difference being calculated by an out-of-step judgment means 18 is compared to the phase angle difference for judging the out-of-step being set in advance, and it is judged that the out-of-step occurs when the phase angle difference exceeds the phase angle difference for judging the out-of-step.

84. 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.

85. 发明专利

JPH10322886A COMMUNICATION METHOD OF PROTECTION RELAY SYSTEM 失效
公开(公告)号：JPH10322886A
公开(公告)日：1998-12-04
申请号：JP12872797
申请日：1997-05-19
申请人： FUJI ELECTRIC CO LTD
发明人： YOSHIDA KAZUO
IPC分类号： H02H3/02 , H02H3/38
摘要： PROBLEM TO BE SOLVED: To perform bidirectional communication of information by making a decision whether a ground fault is present or not when the phase difference deviates from a normal operation range, subjecting a symbol to waveform deformation and notifying a ground fault from a downstream projection relay to an upstream relay. SOLUTION: A microcomputer 20 monitors the zero-phase voltage and the zero-phase current and makes a decision that a ground fault has occurred when the phase difference deviates from a normal operation range for a specified time continuously and then interrupts power supply by operating a breaker 3. Ground fault is informed to an upstream projection relay by deforming the waveform of a received zero-phase voltage and the deformed waveform is stored in a nonvolatile memory 21. More specifically, occurrence and the timing of a ground fault can be informed from a protective relay 2 to a relay 1 by deforming the waveform of a measured voltage being sent from the protective relay 1 to the relay 2 and sensing back the deformed waveform. A ground fault on the upstream side, which could not be detected conventionally, can thereby detected.

86. 发明专利

JPH10285789A NETWORK PROTECTOR RELAY FOR CONTROLLING A CIRCUIT BREAKER 失效
公开(公告)号：JPH10285789A
公开(公告)日：1998-10-23
申请号：JP28899497
申请日：1997-09-12
申请人： EATON CORP
发明人： MORAN STEVEN ALAN
IPC分类号： H02H1/00 , H02H3/07 , H02H3/08 , H02H3/28 , H02H3/38 , H02H7/22
摘要： PROBLEM TO BE SOLVED: To provide a sequence response type network protector relay provided with forward overcurrent protection and an anti-pumping feature. SOLUTION: A digital network protector relay 21 samples the polyphase current, network voltage and phasing voltage at 16, and preferably 32 times per cycle, so that up to the seventh and fifteenth harmonics, respectively, are eliminated from the sequence calculation used to make trip and close decisions. The relay 21 also provides metering, forward overcurrent protection, and an anti-pumping feature, the latter of which locks the circuit breaker 19 out, if a selected number of breaker operations is exceeded during a given time interval. Sequential sampling of the polyphase current and voltages by a single analogto-digital converter reduces the cost of the relay. In order to accommodate metering and extraction of the fundamental components of the current and voltages for the sequence calculation, the polyphase current and network voltage are sampled sequentially in a first order for a given number of cycles and then in a second reverse order, for the same given number of cycles.

87. 发明专利

JPH10201084A AUTOMATIC SECTION SWITCH FOR DISTRIBUTION LINE 失效
公开(公告)号：JPH10201084A
公开(公告)日：1998-07-31
申请号：JP1457397
申请日：1997-01-09
申请人： NISSIN ELECTRIC CO LTD
发明人： KAJIMA TOSHIRO
IPC分类号： G01R31/08 , H02H3/38 , H02H7/26 , H02H11/00 , H02J3/00 , H02J13/00
摘要： PROBLEM TO BE SOLVED: To disconnect a ground fault section of a distribution line and to recover the sound section quickly by making a decision that its own section is faulty when the absolute value of phase difference of overcurrent generating phase between its own section and an adjacent section on the load side exceeds 90 deg. thereby opening a section switch before the distribution line is reclosed. SOLUTION: When a distribution line 13 is interrupted through a control processing section 34, a serial interface 40 and a communication modem 42, overcurrent information and phase difference information is received from a memory 35 in the following section on the load side through communication with a switch controller 22 in that section. When the overcurrent information is present in its own section and occurrence of overcurrent is detected, the control processing section 34 determines the absolute value of difference between a phase difference of overcurrent generating phase of its own section and a phase difference of overcurrent generating phase of the following section on the load side stored in the memory 35 and makes a decision that its own section is faulty when the absolute value exceeds 90 deg.. Consequently, a section switch 20 is opened before the distribution line is recharged and recovered along with the control output circuit 38 and an open coil 29.

88. 发明专利

JPH10155232A DEVICE FOR JUDGING CAUSE OF ABNORMALITY OF DISTRIBUTION LINE 失效
公开(公告)号：JPH10155232A
公开(公告)日：1998-06-09
申请号：JP30925096
申请日：1996-11-20
申请人： CHUBU ELECTRIC POWER , ENERGY SUPPORT CORP
发明人： KANEKO MITSUTAKA , NODA TETSUO , KONO FUMIAKI , MIYAZAWA HIROSHIGE
IPC分类号： G01R31/02 , G01R23/16 , G08B21/00 , H02H3/00 , H02H3/38 , H02H3/50 , H02H7/26
摘要： PROBLEM TO BE SOLVED: To make it possible to judge the abnormality of waveforms and to reduce the cost without preparing a plurality of waveforms for the typical pattern, by identifying the kind of abnormal waveform when abnormality occurs in a distribution line, and displaying the cause of the abnormality in correspondence with the abnormal waveform. SOLUTION: An abnormal-waveform detecting means H1 detects the zero-phase voltage and the zero-phase current generating in a distribution line, discriminates the occurrence of the abnormality in the distribution line based on both detected values and detects the zero-phase voltage waveform and the zero-phase current waveform when the abnormality has occurred at the same time. An abnormality-cause detecting and storing means H2 classifies the causes of the abnormalities in correspondence with the abnormal waveforms obtained based on the accident data actually occurred in the past and the experiment data and stores the causes. A control means H4 identifies the kind of abnormal waveform detected by the abnormal-waveform detecting means H1, reads out the cause of the abnormality in correspondence with the identified waveform kind from the abnormality-cause storing means H2 and outputs the read-out abnormality cause to a display means H3.

89. 发明专利

JPH10145962A OUTAGE SECTION LOCATOR IN SUBSTATION 失效
公开(公告)号：JPH10145962A
公开(公告)日：1998-05-29
申请号：JP31688496
申请日：1996-11-14
申请人： TAKAOKA ELECTRIC MFG CO LTD , KANSAI ELECTRIC POWER CO
发明人： AOSHIMA YOSHIHARU , MINO YOSHIAKI , MOMIYAMA KIYOAKI , ADACHI MASAHIKO , MAENO TAKAYOSHI , YAMAUCHI MASAHIRO
IPC分类号： H02H3/28 , H02H3/38 , H02H7/22 , H02H7/26 , H02J13/00
摘要： PROBLEM TO BE SOLVED: To provide an outage section locator which can detect even if an outage occurs in a substation. SOLUTION: The outage section locator comprises a CT section 71 for detecting currents flowing through radio CT 31a-31f, 32a-32f, a section 76 for comparing the detected current with a predetermined level, a ground voltage detecting section 73, an A/D section 74 for converting the current and voltage waveforms digitally, a section 75 for storing the current and voltage waveforms and the comparison results for a predetermined time, a section 77 for operating the phase angle difference between voltage and current, and information receiving and transmitting sections 78, 79 on the charge side. Each ground section 41a-41f, 42a-42f is provided with ground side charged part information transmitting and receiving sections 45, 46. A decision section 51 is provided with a control section 55 for transmitting/receiving the charged part information through the ground section, and a section 56 for detecting an outage, based on that information.

90. 发明专利

JPH1066247A OPTICAL SENSOR TYPE PROTECTION CONTROLLER 失效
公开(公告)号：JPH1066247A
公开(公告)日：1998-03-06
申请号：JP21468096
申请日：1996-08-14
申请人： TOSHIBA CORP
发明人： NODA HIDEKI , KOSAKATA MASAYUKI , HOSOKAWA OSAMU , SATO SUMIMASA , HORI MASAO , TERAI KIYOHISA , TAKAHASHI MASAO , IKUTA SAKAE , UENISHI TORU , MENJU SHINICHI
IPC分类号： G01R15/24 , H02H3/02 , H02H3/38
摘要： PROBLEM TO BE SOLVED: To reduce secondary output burden onto a transformer for detecting quantity of electricity, by reducing induction against a detected signal in an electrical enclosure and the influence of noise surge, and simplifying the circuit structure of a protection controller. SOLUTION: The current and voltage of a power system are detected as optical analog signals by an optical CT 21 and an optical PD 22, and are sent to O/E converters 23a, 23b by optical cables 28a, 28b respectively. After they are converted into electric signals by the O/E converters 23a, 23b, they are converted into digital signals by A/D transducers 24 in signal processing circuits 18a, 18b. After voltage and current data expressed with the digital signals are converted into a prescribed format by digital operation parts 25, the presence of abnormality such as an accident in the power system is discriminated by a digital processing part 26 based on its magnitude, time-sequencial situation mutual phase relation and so on. The digital processing part 26 sends commands for protection and control to a circuit breaker (CB) 5 for the power system.

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