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1. 发明专利

JP2005304114A Tree contact monitor of distribution line 有权
标题翻译：树木联络监督线
公开(公告)号：JP2005304114A
公开(公告)日：2005-10-27
申请号：JP2004113029
申请日：2004-04-07
申请人： Hitachi Ltd , Tokyo Electric Power Co Inc:The , 東京電力株式会社 , 株式会社日立製作所
发明人： KATO TATSURO , TATEMI MASARU , ONO YASUNORI , SHIMAMURA HIDEHIKO , ENDO YOSHITO , WADA YUICHI , KASASHIMA TAKASHI
IPC分类号： G01R31/02 , G01R25/00 , H02H3/34 , H02H3/347 , H02H7/26
摘要： PROBLEM TO BE SOLVED: To solve a problem that since the tree contact of a distribution line is high in resistance at a stage before leading to a ground fault and a leak current signal is weak, it is difficult to detect and determine a tree contact signal while discriminating it from a residual zero-phase current Io or a residual zero-phase voltage Vo existing in a distribution system.
SOLUTION: The zero-phase voltage Vo, the zero-phase current Io, and the phase difference between the zero-phase voltage and the zero-phase current are acquired at a set period and variation in time series data is monitored. Since these data change on the order of several minutes to several tens minutes, tree contact can be detected by monitoring time variations in magnitudes of zero-phase voltage Vo and zero-phase current Io and a variation in the phase difference between the zero-phase voltage Vo and the zero-phase current Io.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题为了解决由于分配线的树状接触在导致接地故障之前的阶段的电阻高且泄漏电流信号较弱的问题，难以检测和确定树状接触信号，同时与剩余零相电流Io或分配系统中存在的残余零相电压Vo区分开。
解决方案：在设定的周期内获取零相电压Vo，零相电流Io以及零相电压和零相电流之间的相位差，并监视时间序列数据的变化。由于这些数据在数分钟到数十分钟之间变化，可以通过监视零相电压Vo和零相电流Io的时间变化以及零相位相位差的变化来检测树状接触电压Vo和零相电流Io。版权所有（C）2006，JPO＆NCIPI

2. 发明专利

JP2005300207A Method of locating short-circuit point on power distribution line 有权
标题翻译：在电力分配线上定位短路点的方法
公开(公告)号：JP2005300207A
公开(公告)日：2005-10-27
申请号：JP2004113050
申请日：2004-04-07
申请人： Hitachi Ltd , Tokyo Electric Power Co Inc:The , 東京電力株式会社 , 株式会社日立製作所
发明人： KATO TATSURO , TATEMI MASARU , ONO YASUNORI , SHIMAMURA HIDEHIKO , ENDO YOSHITO , WADA YUICHI , KASASHIMA TAKASHI
IPC分类号： G01R31/08
摘要： PROBLEM TO BE SOLVED: To quickly cope with the short-circuit by specifying not only the interval of the short-circuit but also specifying the short-circuit point and to shorten the recovery hours after an accident happened.
SOLUTION: The short-circuit position is located from the line distance and the impedance Zo utilizing the potential difference of voltage to the earth between two measuring points positioning nearer to the electric power source than the short-circuit point. Furthermore, by considering for improving measuring precision, the voltage to the earth detected on the load side of the short-circuit point, the short-circuit position is calculated independently of the short-circuit resistance being an error factor. The method can specify not only the interval of the short-circuit but also specify the short circuit point, therefore quick response can be expected, so recovery hours after the accident can be shortened.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：通过指定短路的间隔，同时指定短路点，缩短事故发生后的恢复时间，快速应对短路。
解决方案：短路位置位于距离短路点更靠近电源的两个测量点之间，距离线距离和阻抗Zo利用电压对地的电位差。此外，通过考虑提高测量精度，在短路点的负载侧检测到的地电压，短路位置被独立于短路电阻计算为误差因子来计算。该方法不仅可以指定短路的间隔，还可以指定短路点，因此可以预期快速响应，因此可以缩短事故发生后的恢复时间。版权所有（C）2006，JPO＆NCIPI

3. 发明专利

JP2005300206A Cable status monitoring device 审中-公开
标题翻译：电缆状态监测装置
公开(公告)号：JP2005300206A
公开(公告)日：2005-10-27
申请号：JP2004113044
申请日：2004-04-07
申请人： Hitachi Ltd , Tokyo Electric Power Co Inc:The , 東京電力株式会社 , 株式会社日立製作所
发明人： KATO TATSURO , TATEMI MASARU , ONO YASUNORI , SHIMAMURA HIDEHIKO , ENDO YOSHITO , WADA YUICHI , KASASHIMA TAKASHI
IPC分类号： G01R31/02
摘要： PROBLEM TO BE SOLVED: To monitor the cable status with a high confidence while suppressing the malfunction and incorrect determination in the cable status monitoring.
SOLUTION: The direction of the measured signal is determined by measuring the zero phase voltage and the zero phase current at each detection point for deterioration diagnosis of a cable under operation. For measuring the current pulse, a current sensor having ≥50 kHz frequency response characteristics is used and the sampling frequency for sufficiently detecting the oscillation wave form is made ≥50 kHz.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：在抑制故障和电缆状态监视中的错误确定的同时，以高置信度监视电缆状态。
解决方案：测量信号的方向通过测量每个检测点处的零相电压和零相电流来确定，用于在运行中的电缆的劣化诊断。为了测量电流脉冲，使用具有≥50kHz频率响应特性的电流传感器，并且用于充分检测振荡波形的采样频率为≥50kHz。版权所有（C）2006，JPO＆NCIPI

4. 发明专利

JP2005300205A Method and device for locating ground fault point 有权
标题翻译：用于定位地面故障点的方法和装置
公开(公告)号：JP2005300205A
公开(公告)日：2005-10-27
申请号：JP2004113040
申请日：2004-04-07
申请人： Hitachi Ltd , Tokyo Electric Power Co Inc:The , 東京電力株式会社 , 株式会社日立製作所
发明人： TATEMI MASARU , KATO TATSURO , ONO YASUNORI , SHIMAMURA HIDEHIKO , ENDO YOSHITO , WADA YUICHI , KASASHIMA TAKASHI
IPC分类号： G01R31/08 , H02H3/00 , H02H3/34
摘要： PROBLEM TO BE SOLVED: To locate a ground fault point from the waveform of a zero-phase current in ground fault and to use an A/D converter of low sampling frequency. SOLUTION: A monitoring system 1 is equipped with a relational expression between the position of a ground fault point and a resonance frequency of a zero-phase waveform, previously calculated by simulation of a system model. Ground fault detectors 2 each comprise a sensor part 2-1 for current and voltage, an accident detection part 2-2 equipped with an A/D converter and a failure determination part, and a memory 2-3 for recording a zero-phase current. The detectors 2 are disposed on respective distribution lines to determine a ground fault zone from ground fault data acquired from the fault detectors 2. Further, the ground fault point is located by applying the waveform of the zero-phase current in the memory 2-3 to the relational expression. An inexpensive system can be structured since an A/D converter of low sampling frequency can be used. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：从接地故障中的零相电流的波形中定位接地故障点，并使用低采样频率的A / D转换器。
解决方案：监控系统1配备有先前通过仿真系统模型计算的接地故障点的位置和零相位波形的谐振频率之间的关系表达式。接地故障检测器2各自包括用于电流和电压的传感器部分2-1，配备有A / D转换器和故障确定部件的事故检测部件2-2以及用于记录零相电流的存储器2-3 。检测器2设置在相应的分配线上，以从故障检测器2获取的接地故障数据确定接地故障区。此外，通过将零相电流的波形施加到存储器2-3中来定位接地故障点关系表达。可以使用廉价的系统，因为可以使用低采样频率的A / D转换器。版权所有（C）2006，JPO＆NCIPI

5. 发明专利

JP2006189356A Disconnection detector for high-tension distrubution line 有权
标题翻译：用于高张力分配线的断路检测器
公开(公告)号：JP2006189356A
公开(公告)日：2006-07-20
申请号：JP2005002151
申请日：2005-01-07
申请人： Tokyo Electric Power Co Inc:The , 東京電力株式会社
发明人： KASASHIMA TAKASHI , WADA YUICHI , MIYASHITA TAKESHI , YANAGIDA SHIGEYUKI , TATSUYA SHIYOUICHI , KANEWA HITOSHI
IPC分类号： G01R31/02
摘要： PROBLEM TO BE SOLVED: To provide a disconnection detector for a high-tension distrubution line capable of detecting disconnection using a voltage detected by an existing voltage detector of high detection precision, without providing a new voltage detector.
SOLUTION: High-voltage single phase voltages of respective single phases are input from electric power source side three-phase voltages of a switch 14 connected to the high-tension distrubution line 13, and load side three-phase voltages thereof, by a high-voltage input means 22, the two other phases different respectively from the one phase in the single phase voltages, out of the electric power source side three-phase voltages of the high-tension distrubution line 13 and the load side three-phase voltages thereof, are stepped down respectively by single phase transformers 17a, 17b to be input as low-voltage single phase voltages for a low-tension distribution line by a low voltage input means 23, and a disconnection determination means 24 detects the disconnection in the high-tension distrubution line, based on a phase relation between the high-voltage single phase voltages input by the high voltage input means 22 and the low-voltage single phase voltages input by the low voltage input means 23.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种能够使用由检测精度高的现有电压检测器检测到的电压来检测断开的高压分散管的断开检测器，而不需要提供新的电压检测器。解决方案：通过连接到高压分配管线13的开关14的电源侧三相电压及其负载侧三相电压，从各个单相的高电压单相电压输入，高电压输入装置22，在高压分配管线13的电源侧三相电压和负载侧三相电压之外，在单相电压中的一相中的两个相位分别不同其电压分别由单相变压器17a，17b降压，作为低电压输入装置23的低压配电线路的低压单相电压输入，断线判定单元24检测出基于由高电压输入装置22输入的高压单相电压与由低电压输入装置输入的低压单相电压之间的相位关系的高压分布管线输入手段23.版权所有（C）2006，JPO＆NCIPI

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