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1. 发明专利

JP2004088963A Method for estimating state of linkage of distributed power supplies in power distribution system 有权
公开(公告)号：JP2004088963A
公开(公告)日：2004-03-18
申请号：JP2002249350
申请日：2002-08-28
申请人： Kansai Electric Power Co Inc:The , Mitsubishi Electric Corp , 三菱電機株式会社 , 関西電力株式会社
发明人： KOWADA YASUYUKI , SAKAGUCHI HIROJI , YAMAZAKI SHIGEO , YOSHIMI MASASHI
IPC分类号： H02J3/00
摘要： PROBLEM TO BE SOLVED: To provide a method for estimating the state of linkage of distributed power supplies, wherein an electrical quantity substituting for a voltage is used for measurement and thus the state of linkage in a distribution system can be estimated with accuracy. SOLUTION: The method is for estimating the state of linkage of distributed power supplies in a power distribution system. A plurality of measuring points 332 to 335 are set in the distribution system. The direction of a current or a current value is measured at each of the measurement points. Then, the adjacent measuring points are compared with each other with respect to the direction of the current or the current value, and thereby the state of linkage of the distributed power supplies G is estimated. COPYRIGHT: (C)2004,JPO

2. 发明专利

JP2005140519A Protective relay 有权
标题翻译：保护继电器
公开(公告)号：JP2005140519A
公开(公告)日：2005-06-02
申请号：JP2003374194
申请日：2003-11-04
申请人： Kansai Electric Power Co Inc:The , Mitsubishi Electric Corp , 三菱電機株式会社 , 関西電力株式会社
发明人： NAKAJIMA TOSHIRO , TAKASHIMA KAZUO , KOWADA YASUYUKI , YOSHIMI MASASHI , FUJIYAMA WATARU
IPC分类号： G01R31/02 , G01R15/24 , H02H3/08
摘要： PROBLEM TO BE SOLVED: To provide a protective relay capable of realizing low cost production and also easily realizing a countermeasure against electric noise. SOLUTION: Light beams A1 emitted from each light source are transmitted through each of optical current sensors 4-1 to 4-3 via each of optical fibers 2-1 to 2-3 and supplied to a multiplexer 6 as optical output signals B1, the polarized surface of which are rotated corresponding to each current of power transmission lines 3-1 to 3-3. By the multiplexer 6, the optical output signals B1 from each of the optical current sensors 4-1 to 4-3 are optically summed up into a summation signal C1 and supplied to a half mirror 16. An optical process determination part 7 comprises a feed back circuit 17 for feeding back of the output of a liquid crystal 9, therefore, if the level of the summation signal C1 exceeds a threshold value, the intensity of a transmitted light H1 rises stepwise, and supplied to an optical driving element 18 via a beam splitter 13, and converted into an electric signal for on/off control circuit breakers 38-1 to 38-3 for protecting the power transmission lines 3-1 to 3-3. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种能够实现低成本生产的保护继电器，并且还容易实现电噪声的对策。解决方案：从每个光源发射的光束A1经由光纤2-1至2-3中的每一个透射通过每个光电流传感器4-1至4-3，并且作为光输出信号提供给多路复用器6 B1，其极化面相应于输电线路3-1〜3-3的各个电流而旋转。通过多路复用器6，将来自每个光电流传感器4-1至4-3的光输出信号B1光学地求和到求和信号C1中并提供给半反射镜16.光学处理确定部分7包括馈电用于反馈液晶9的输出的反向电路17，因此，如果求和信号C1的电平超过阈值，则透射光H1的强度逐步上升，并经由分束器13，并转换成用于保护输电线路3-1至3-3的开/关控制断路器38-1至38-3的电信号。版权所有（C）2005，JPO＆NCIPI

3. 发明专利

JPH0833207A REACTIVE POWER PLANNING METHOD FOR POWER SYSTEM 失效
公开(公告)号：JPH0833207A
公开(公告)日：1996-02-02
申请号：JP16226494
申请日：1994-07-14
申请人： KANSAI ELECTRIC POWER CO , MITSUBISHI ELECTRIC CORP
发明人： YOSHIMI MASASHI , KESANAKURUTEI SHIYANTEI SUWARO , IZUI YOSHIO
IPC分类号： G06F15/18 , G05B13/02 , G06F17/00 , G06F19/00 , G06N3/00 , G06N99/00 , G06Q50/00 , G06Q50/06 , H02J3/18
摘要： PURPOSE:To realize reactive power control closer to an optimal solution by generating a chromosome in a genetic algorithm employing genes as control variables, performing a genetic operation for the chromosome and evaluating the genetic operation using a total objective expression. CONSTITUTION:(k) normalized values Pnl1-Pnlk corresponding to solids P1, (p) normalized values Pnn1-Pnnp corresponding to solids Pn, and the like, are encoded and coupled randomly with corresponding rows thus generating individuals having chromosomes 1-i. The chromosomes are then subjected to genetic operations including selection, crossing, and mutation and power flow is analyzed using control variables determined through the genetic operation. In other words, calculation is made for an objective expression related to the total effective power loss and total voltage variation. The genetic operation and evaluation are repeated until a significant variation disappears from the objective expression and all chromosomes are settled.

4. 发明专利

JPH10248158A WIDE-AREA SYSTEM PROTECTION RELAY AND DEVICE FOR AUTOMATIC RECOVERY FROM CIRCUIT BREAKER FAILURE 失效
公开(公告)号：JPH10248158A
公开(公告)日：1998-09-14
申请号：JP5076297
申请日：1997-03-05
申请人： MITSUBISHI ELECTRIC CORP , KANSAI ELECTRIC POWER CO
发明人： KATAYAMA YOSHIHIRO , TOTSU YURI , KASHIWAMORI WATARU , FUJIYAMA WATARU , TANAKA KOICHI , SHIMANO SHINJI , YOSHIMI MASASHI
IPC分类号： H02H3/28 , H02H3/38 , H02H3/40 , H02H7/26
摘要： PROBLEM TO BE SOLVED: To minimize a range of interruption and identify a failure block, by installing a failure block judging means which identifies a failure block based on the result of detection by a failure detector which is installed in each protection block defined by dividing a power system into minimum interruption blocks, and isolating a failure block identified by the failure block judging means from the power system. SOLUTION: A line protection block 51 contains failure detectors 41, 22, 49, and protects a transmission line 5, and a line protection block 52 contains failure detectors 43, 44, and protects a transmission line 6. Further, a line protection block 53 contains failure detectors 45, 46, 50, and protects a transmission line 7, and a line protection block 54 contains failure detectors 47, 48, and protects a transmission line 8. The results from the failure detectors 41-50 at terminals, collected for each line protection block are judged by a failure block judging means corresponding to the line protection blocks to detect a failure block. Then the failure block is isolated from the power system by an isolation command outputting means.

5. 发明专利

JP2004032920A Protective relay system 有权
公开(公告)号：JP2004032920A
公开(公告)日：2004-01-29
申请号：JP2002186730
申请日：2002-06-26
申请人： Kansai Electric Power Co Inc:The , Mitsubishi Electric Corp , 三菱電機株式会社 , 関西電力株式会社
发明人： TANAKA YASUYUKI , ITO KENJI , NAKAYAMA HIDEO , YOSHIMI MASASHI , KOIZUMI HIROSHI
IPC分类号： H02H3/28
摘要： PROBLEM TO BE SOLVED: To obtain a synchronous control algorithm which efficiently controls the synchronization between terminals in a protective relay system with LAN used for computer/transmission line. SOLUTION: The protective relay system is so constituted that the current at both the ends of a section to be protected in a power transmission line is periodically sampled and subjected to A-D conversion. The converted current is transmitted between general-purpose computers 10 and 11 provided with a protecting function at both the ends through a LAN line 12. Then, differential computation is carried out on the current at the both ends. Control is exercised to synchronize the sampling timing of the general-purpose computers 10 and 11 so that the difference between a previously computed transmission delay time (Ta+Tb) between the general-purpose computers 10 and 11 and an actual time (Tx) actually measured online will be eliminated. COPYRIGHT: (C)2004,JPO

6. 发明专利

JPH06259106A OPTIMIZING METHOD FOR OUTPUT POWER OF GENERATOR 失效
公开(公告)号：JPH06259106A
公开(公告)日：1994-09-16
申请号：JP4379893
申请日：1993-03-04
申请人： KANSAI ELECTRIC POWER CO , MITSUBISHI ELECTRIC CORP
发明人： YOSHIMI MASASHI , KEE ESU SUWAROTSUPU , IZUI YOSHIO
IPC分类号： G05B13/02 , G06F15/18 , G06N99/00
摘要： PURPOSE:To calculate the optimum output power of a generator by forming chromosome based on the information including the present power output value and carrying out an hereditary operation for the hereditary algorithm to output the electric power at the least cost. CONSTITUTION:The information on the upper and lower limit power values that can be generated and the output power of generators 1a-1c are transmitted from these generators at each fixed time. An output power optimizing device 10 normalizes those output information to set at random a prescribed number of population in an initial state of the hereditary alogithm and encodes the output information corresponding to the population. Then only the data strings corresponding to the generators are connected together to form the chromosomes in number equal to the population among those encoded data strings. Then a hereditary operation is carried out, and the chromosomes are separated into bit strings and decoded. Thus the chromosomes are evaluated based on the conversion information. Then the end optimization is decided when all evaluation values of chromosomes are included in a prescribed rage. Then each optimum output value of generators 1a-1c is displayed on a CRT 15.

7. 发明专利

JPH09101340A INTERMITTENT GROUND FAULT POSITION LOCATING METHOD AND INSULATION DETERIORATION MONITORING METHOD IN POWER DISTRIBUTION SYSTEM 失效
公开(公告)号：JPH09101340A
公开(公告)日：1997-04-15
申请号：JP19379196
申请日：1996-07-24
申请人： KANSAI ELECTRIC POWER CO , FUJI ELECTRIC CO LTD
发明人： KIKUCHI TATSUO , YOSHIMI MASASHI , TANAKA KOICHI , FUJIYAMA WATARU , HIKOSAKA TOMOYUKI
IPC分类号： G01R31/08
摘要： PROBLEM TO BE SOLVED: To enable the position of a ground fault to be located from the results of directly measuring voltage or current when an intermittent ground fault occurs by a method wherein a resonance frequency at which a ground fault will occur is found beforehand for a plurality of specified possible ground fault positions. SOLUTION: A comparative resonance frequency as resonance frequency when a ground fault has occurred, is found beforehand for a plurality of specified ground fault positions required for locating position. When the occurrence of any intermittent ground fault is detected, the waveform of a pulse-like voltage or current generated by an intermittent ground fault is measured and recorded by sensors S1 and S2 and a digital oscilloscope DO. A frequency is analyzed based on a waveform data thus obtained to find an actually measured resonance frequency. The position of the fault corresponding to the comparative resonance frequency the closest to the actually measured resonance frequency can be located as a position at which the intermittent ground fault occurs actually by comparing this actually measured resonance frequency with the comparative resonance frequency. Computation for analysis involved is performed by a computer CP, a personal computer PC and the like.

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