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1.发明授权Method and system of transformer protection and method and system of detecting a defective winding 失效变压器保护方法及系统及检测缺陷绕组的方法和系统
公开(公告)号：US5170308A
公开(公告)日：1992-12-08
申请号：US466926
申请日：1990-01-18
申请人： Keizo Inagaki , Yoshihiro Sano , Yoshiaki Matsui , Takafumi Maeda
发明人： Keizo Inagaki , Yoshihiro Sano , Yoshiaki Matsui , Takafumi Maeda
CPC分类号： H02H7/045
摘要： A method and system of transformer protection in which parallel admittance currents indicative of the apparent excitation state of a transformer to be protected are evaluated from the transformer terminal voltages and currents sampled at a proper interval, and discrimination between an internal defect and excitation inrush is made in response to a magnitude of the parallel admittance current, and a breaker opening command is issued in response to a judgement of internal defect. The method and system enables high-accuracy and high-sensitivity fault detection through a simple computation.
摘要翻译： 根据变压器端子电压和适当间隔采样的电流来评估指示待保护的变压器的表观激发状态的并联导纳电流的变压器保护的方法和系统，并且进行内部缺陷和激励涌入之间的区分 响应于平行导纳电流的大小，并且响应于内部缺陷的判断而发出断路器打开命令。 该方法和系统通过简单的计算实现了高精度和高灵敏度的故障检测。
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公开(公告)号：US4620257A
公开(公告)日：1986-10-28
申请号：US632846
申请日：1984-07-20
申请人： Yoshihiro Sano , Fumio Iwatani , Takao Kubo , Yoshiteru Miki
发明人： Yoshihiro Sano , Fumio Iwatani , Takao Kubo , Yoshiteru Miki
CPC分类号： H02H7/263 , H02J13/0055 , Y02E60/725 , Y04S10/20
摘要： In a carrier relay system in which protective relay apparatus are disposed in terminal stations respectively and interchange information between the terminal stations via a signal transmission line for detecting a trouble occurred in power transmission lines on the basis of the exchanged information, specific information K is inserted in a predetermined position of a signal transmitted from the first terminal station to the second terminal station, and the specific information K is inserted intact in another predetermined position of a signal returned from the terminal station to the terminal station. In the terminal station, the specific information K inserted in the signal transmitted therefrom is compared with the specific information K inserted in the signal returned from the terminal station for deciding the presence or absence of a trouble occurred in the power transmission lines. The signal transmission line extending between the terminal stations includes two transmission channels, and circuit breakers are tripped when a fault has occurred in one or both of the signal transmission channels and a trouble detection relay has operated.
摘要翻译： 在保护中继装置分别设置在终端站中的载波中继系统中，基于所交换的信息，经由用于检测输电线路中出现的故障的信号传输线在各终端站之间交换信息，插入特定信息K 在从第一终端站发送到第二终端站的信号的预定位置，并且将特定信息K完整插入到从终端站返回到终端站的信号的另一预定位置。 在终端中，将从其发送的信号中插入的特定信息K与从终端返回的信号中插入的特定信息K进行比较，以确定在输电线路中是否存在故障。 在终端站之间延伸的信号传输线包括两个传输通道，并且在一个或两个信号传输通道中发生故障并且故障检测继电器已经操作时，断路器跳闸。
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公开(公告)号：US3984737A
公开(公告)日：1976-10-05
申请号：US530286
申请日：1974-12-06
CPC分类号： H02H1/0053 , H02H3/26 , H02H3/382 , H02H3/42 , H02H3/46
摘要： Protection of an electric power system is attained under control of a digital computer. Voltage and current of the electric power system to be protected are subjected to sampling at a predetermined sampling frequency and are applied to the computer after being converted into digital signals. The computer computes the product of these two digital signal inputs. The signal thus obtained is added to a preceding signal representing the product of voltage and current taken at time before a predetermined period of time so that unnecessary frequency components included in these signals can be removed. Then, the level of the resultant signal (which is free from the unnecessary frequency components) is compared with the level of a reference signal. When the former is greater than the latter, there is a fault in the electric power system, and necessary protective measures are taken to protect the electric power system.
摘要翻译： 在数字计算机的控制下实现电力系统的保护。 要保护的电力系统的电压和电流以预定的采样频率进行采样，并且在被转换成数字信号之后被施加到计算机。 计算机计算这两个数字信号输入的乘积。 由此获得的信号被加到表示在预定时间段之前的时间所获得的电压和电流的乘积的先前信号，从而可以去除包括在这些信号中的不必要的频率分量。 然后，将结果信号（没有不必要的频率分量）的电平与参考信号的电平进行比较。 当前者大于后者时，电力系统存在故障，采取必要的保护措施保护电力系统。
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公开(公告)号：US4772978A
公开(公告)日：1988-09-20
申请号：US918038
申请日：1986-10-14
申请人： Yoshifumi Oura , Kunio Matsuzawa , Kazuyoshi Yoshida , Keizo Inagaki , Hiroyuki Kudo , Yoshihiro Sano
发明人： Yoshifumi Oura , Kunio Matsuzawa , Kazuyoshi Yoshida , Keizo Inagaki , Hiroyuki Kudo , Yoshihiro Sano
摘要： In a transformer protection system, data of voltages and currents detected at individual terminals of a transformer connected to an electric power system are supplied to a computer. The computer computes driving point admittances or shunt admittances of the transformer on the basis of the voltage and current data and predetermined transfer admittances of the transformer and decides that an internal fault has occurred in the transformer when the values of the driving point admittances or shunt admittances deviate from pre-set reference values, thereby disconnecting the transformer from the electric power system.
摘要翻译： 在变压器保护系统中，连接到电力系统的变压器的各个端子处检测到的电压和电流的数据被提供给计算机。 计算机根据电压和电流数据以及变压器的预定转移导纳点计算出变压器的驱动点导纳或分流导纳，并确定当变频器内部故障发生在驱动点接收或分流导纳时 偏离预设参考值，从而将变压器与电力系统断开连接。
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公开(公告)号：US6029741A
公开(公告)日：2000-02-29
申请号：US201768
申请日：1998-12-01
申请人： Kazuo Yokogi , Yoshihiro Sano
发明人： Kazuo Yokogi , Yoshihiro Sano
CPC分类号： F17C13/002 , F17C9/02 , F17C2201/0109 , F17C2201/0114 , F17C2201/032 , F17C2201/058 , F17C2205/0107 , F17C2205/0173 , F17C2205/0176 , F17C2223/0153 , F17C2223/033 , F17C2227/0313 , F17C2270/0518
摘要： The present invention provides a heating apparatus for effectively heating a gas container, and more particularly a liquified gas filled in the gas container. The heating apparatus comprises a mounting base having a first space and a second space, each formed in its inside, and an air fan heater for supplying heated air to the first space of said mounting base. In said mounting base, a first through hole communicating with said first space and second through holes communicating with said second space are formed inside of a mounting area, and third through holes communicating with said second space are formed outside of said mounting area. When a gas container is mounted on the mounting base, the heated air is blasted from said first space onto the bottom face of said gas container through said first through hole, whereby heat is effectively transmitted from the bottom face of the gas container to the liquified gas contents of the gas container.
摘要翻译： 本发明提供一种加热装置，用于有效地加热气体容器，特别是填充在气体容器中的液化气体。 加热装置包括：安装基座，其具有形成在其内部的第一空间和第二空间;以及风扇加热器，用于将加热的空气供给到所述安装基座的第一空间。 在所述安装基座中，在安装区域的内部形成有与所述第一空间连通的第一通孔和与所述第二空间连通的第二通孔，并且与所述第二空间连通的第三通孔形成在所述安装区域的外部。 当气体容器安装在安装基座上时，加热的空气从所述第一空间通过所述第一通孔喷射到所述气体容器的底面上，由此热量从气体容器的底面有效地传递到液化的 气体容器的气体含量。
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6.发明授权Simultaneously sampled remote data reading and transmission system using optical fibers 失效使用光纤同时采集远程数据读取和传输系统
公开(公告)号：US4161651A
公开(公告)日：1979-07-17
申请号：US882909
申请日：1978-03-02
申请人： Yoshihiro Sano , Tomio Chiba , Hiroyuki Kudou , Yoshiteru Miki
发明人： Yoshihiro Sano , Tomio Chiba , Hiroyuki Kudou , Yoshiteru Miki
CPC分类号： H02J13/0065 , G02B6/2817 , H02H1/0069
摘要： A system for sampling and collecting simultaneously data from terminal apparatus installed at a plurality of data measuring locations (data sources) distributed in a system to be monitored or controlled by using at least a single optical fiber includes means for initiating sampling of measured quantities in response to a synchronizing signal supplied-from a master station, and means for allotting to the terminal apparatus respective particular time slots during which the data as measured is transmitted to the master station through at least a single optical fiber.
摘要翻译： 一种系统，用于同时从安装在通过使用至少一根光纤监视或控制的系统中的多个数据测量位置（数据源）的数据测量位置（数据源）进行采样和收集数据的系统包括用于响应于开始采样测量量的装置 到从主站提供的同步信号，以及用于向终端设备分配相应的特定时隙的装置，在该时间期间，通过至少一根光纤将所测量的数据发送到主站。
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公开(公告)号：US4032913A
公开(公告)日：1977-06-28
申请号：US459386
申请日：1974-04-09
申请人： Masami Okamura , Fumio Aoki , Yoshihiro Sano , Jun-ichi Makino , Yoshiteru Miki , Hiroshi Sasaki , Kazuo Seo
发明人： Masami Okamura , Fumio Aoki , Yoshihiro Sano , Jun-ichi Makino , Yoshiteru Miki , Hiroshi Sasaki , Kazuo Seo
摘要： In a parallel digital signal delivered from an AD converter, "1" appearing in a bit position nearest to the most significant digit (MSD) is detected, and the parallel digital signal is converted into a serial digital signal consisting of a weight character indicating this specific bit position and a data character indicating the numerical value of the data. Further, a weight bit is provided for changing the weight of the output of the AD converter depending on the analog quantity subjected to AD conversion so as to reduce the number of bits required for coding the parallel signal.
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