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

JP2004289975A Harmonic wave monitoring apparatus of protective relaying device 审中-公开
公开(公告)号：JP2004289975A
公开(公告)日：2004-10-14
申请号：JP2003081787
申请日：2003-03-25
申请人： Meidensha Corp , 株式会社明電舎
发明人： SHIRASAGO HIROAKI , FUJITA YOSHITO , JINBO MASAYUKI , TERADA ATSUHIKO
IPC分类号： H02H3/05 , H02H3/02
摘要： PROBLEM TO BE SOLVED: To provide an apparatus which improves the accuracy of harmonic wave superposition monitoring. SOLUTION: In the harmonic wave supervision monitoring, there are provided an analog filter which individually deals with a plurality of input channels, and an A/D converter for analog-digital converting by sequentially scanning the analog filter, and the analog input unit of a protective relaying device is monitored by applying a harmonic voltage from a harmonic wave generating circuit to the input side of the analog filter. Also, there are provided a monitor reference signal supply unit for supplying a monitor reference harmonic wave between the harmonic wave generating circuit and the A/D converter to monitor a difference between the harmonic wave input extracted by the analog input unit of each channel and the monitor reference harmonic wave. COPYRIGHT: (C)2005,JPO&NCIPI

2. 发明专利

JP2009201209A Digital protection relay 有权
标题翻译：数字保护继电器
公开(公告)号：JP2009201209A
公开(公告)日：2009-09-03
申请号：JP2008038307
申请日：2008-02-20
申请人： Meidensha Corp , 株式会社明電舎
发明人： HOSOYA KOJI , FUJITA YOSHITO
IPC分类号： H02H3/44
摘要： PROBLEM TO BE SOLVED: To eliminate erroneous determination in protection computation due to saturation of CT and prevent malfunction and inoperability just by adding a few arithmetic processing elements to an existing protection relay. SOLUTION: A digital protection relay samples and converts the transformer current of an auxiliary current transformer 1 into digital data through an A-D converter 3. The relay extracts a fundamental wave component from this data through a digital filter 4 and carries out protection computation at a protection computation unit 5 based on this fundamental wave component. When it is determined that the amplitude of the digital data obtained as the result of conversion by the A-D converter includes exceeded the full scale of the A-D converter, a saturation determination processing unit 6 obtains relay operation output. The saturation determination processing unit obtains relay operation output only when the full scale of the A-D converter is exceeded both on the positive side (positive wave) and on the negative side (negative wave) during one cycle of the digital data. The saturation determination processing unit obtains relay operation output on condition that the effective value of the fundamental wave component exceeds a set value. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：
要解决的问题：要消除的保护计算错误确定由于CT的饱和度和防止故障和不能操作只是添加几个算术处理元件到现有的保护继电器。解决方案：数字保护继电器通过AD转换器3将辅助电流互感器1的变压器电流采样并转换为数字数据。继电器通过数字滤波器4从该数据中提取基波分量，并执行保护计算在基于该基波分量的保护计算单元5处。当确定是，由A-D转换器转换的结果获得的数字数据的幅度包括超过A-D转换器的满刻度，饱和判定处理单元6取得中继操作输出。饱和判定处理单元仅在数字数据的一个周期期间在正侧（正波）和负侧（负波）都超过A-D转换器的满量程时才获得继电器动作输出。饱和确定处理单元获得关于条件中继操作输出基波分量的有效值超过设定值。版权所有（C）2009，JPO＆INPIT

3. 发明专利

JP2009003592A Failure detection/recovery system for computer 有权
标题翻译：计算机故障检测/恢复系统
公开(公告)号：JP2009003592A
公开(公告)日：2009-01-08
申请号：JP2007162018
申请日：2007-06-20
申请人： Meidensha Corp , 株式会社明電舎
发明人： HORIIKE MASASHI , FUJITA YOSHITO , OKITSU TOSHIYUKI , OISHI HIDEO
IPC分类号： G06F11/14 , G06F11/16 , G06F11/30
摘要： PROBLEM TO BE SOLVED: To surely restore a system by early detecting various failures such as a program failure. SOLUTION: This system is provided with a restart circuit for, when a failure is detected by failure monitoring by a watchdog timer 5, memory check, basic arithmetic check, and monitoring in a dual CPU configuration, issuing system reset by a register 7 and an one-shot timer 8 in response to the register instruction of the program of a CPU 1, and for recovering the system from a temporary failure of this system. This system is also provided with a recording means for integrating and recording the number of times of restart by a restart processing means in the CPU, or by the restart circuit. This system is provided with a mechanism for evaluating the operation stability of the system according to failure situations for deciding whether to restart or stop the system based on the evaluation result. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：通过早期检测诸如程序故障的各种故障来确定恢复系统。
解决方案：该系统提供重启电路，当通过看门狗定时器5的故障监视检测到故障时，存储器检查，基本算术检查和双CPU配置中的监控，由寄存器发出系统复位 7和响应于CPU 1的程序的寄存器指令的单触发定时器8，并且用于从该系统的暂时故障中恢复系统。该系统还具有记录装置，用于通过CPU中的重启处理装置或重启电路来集成和记录重启次数。该系统具有用于根据故障情况评估系统的运行稳定性的机构，用于基于评估结果决定是否重新启动或停止系统。版权所有（C）2009，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