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1. 发明专利

JP2002034298A GENERATOR EXCITATION-CONTROLLING DEVICE 失效
公开(公告)号：JP2002034298A
公开(公告)日：2002-01-31
申请号：JP2000211619
申请日：2000-07-12
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： SEKOGUCHI MASAHIRO , GOTO MASUO , AMANO MASAHIKO , SHIBATA KATSUHIKO , NERI KATSUYOSHI , NISHIGAITO HIDETOSHI
IPC分类号： H02P9/14
摘要： PROBLEM TO BE SOLVED: To compose a one-machine infinity system model regardless of the position of a middle load, and to set a control constant for generating a stabilization signal to an optimum value based on the amount of electricity at the own end of a generator. SOLUTION: At a parameter estimation operation part 114, equivalent resistance, equivalent reactance, and equivalent voltage at a system side are estimated according to merely effective power, reactive power, and a terminal voltage at the own end of the generator. At a phase difference operation part 115, a linear block diagram is created for obtaining the phase difference between a generator internal induction voltage and an internal phase angle based on each estimated value and a generator constant, and at the same time characteristic constants K1 to K6 are obtained. At a PSS amount-of-phase-compensation operation part 120, an optimum phase and an amount Δθ of PPS phase compensation are obtained based on the phase difference and characteristic constants, time constants T1 to T4 and a gain G2 are obtained based on the operation value, and the time constants of advance and delay elements 111 and 112 and the gain of a gain element 113 are determined according to the time constants T1 to T4 and gain G2.

2. 发明专利

JP2001333534A CONTROLLER FOR AC-TO-DC CONVERTER 失效
公开(公告)号：JP2001333534A
公开(公告)日：2001-11-30
申请号：JP2000148386
申请日：2000-05-19
申请人： KANSAI ELECTRIC POWER CO , SHIKOKU ELEC POWER , ELECTRIC POWER DEV CO , HITACHI LTD , TOSHIBA CORP
发明人： AZUMA MASAKI , UEHARA NOBUKAZU , KATO KAZUO , SEKOGUCHI MASAHIRO , GOTO MASUO , TANOMURA KENICHI , ARAI JUNICHI
IPC分类号： H02J3/24 , H02J3/36 , H02M7/48
摘要： PROBLEM TO BE SOLVED: To see that it does not exert influence upon the control of firing angle of a system and a DC transmission system, in system conditions where axially torsional resonance phenomena do not occur, and precisely suppress the diffusion of the vibration of shaft torsional resonance phenomena, in system condition that the shaft torsional resonance phenomena occur. SOLUTION: This controller is equipped with an shaft torsional vibration component extracting means which detects the quantity of electricity in the vicinity of a conversion place and extracts the shaft torsional vibration components of a turbine generator, a starting signal computing means, which computes and outputs a starting signal for an shaft torsional resonance phenomena suppressive control circuit for suppressing the shaft torsional resonance phenomena of a turbine generator from the shaft torsional vibration components extracted by the shaft torsional vibration extracting means, a stop signal computing means which computes and outputs a stop signal for an shaft torsional resonance phenomena suppressing control circuit from the shaft torsional vibration components extracted by the shaft torsional vibration component extracting means, and a starting/stopping means which receives the start signal from the start signal computing means or the stop signal from the start signal computing means and starts or stops the shaft torsional resonance phenomena suppressing control circuit.

3. 发明专利

JP2000224896A DC TRANSMISSION-CONTROLLING DEVICE 失效
公开(公告)号：JP2000224896A
公开(公告)日：2000-08-11
申请号：JP2520199
申请日：1999-02-02
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO , SHIKOKU ELEC POWER , ELECTRIC POWER DEV CO
发明人： SEKOGUCHI MASAHIRO , GOTO MASUO , MADORI IWAO , YOSHIZUMI TATSUNORI , AZUMA MASAKI , MURAKAMI HIROAKI , KATO KAZUO
IPC分类号： H02J3/36 , H02P9/00
摘要： PROBLEM TO BE SOLVED: To detect a frequency other than a shaft torsional vibration frequency region according to the bus voltage of a DC conversion station, and to efficiently suppress and control shaft torsion. SOLUTION: A device is equipped with frequency detectors 142a-142c that detect frequencies fa, fb, and fx of each phase according to phase voltages Va, Vd, and Vc of an AC bus 5 of a DC conversion station being connected to a generator 2, an averaging circuit 143 that obtains the average value of the frequencies fa, fb, and fc for detecting the frequency of the bus 5, a filter 144 and a judgment circuit 145 that detect shaft torsional vibration according fluctuation in the frequency of the bus 5, a filter 147 that detects a control signal for suppressing the detected shaft torsional vibration, and an adder 150 that adds the control signal to the output of a constant current-controlling device 149. By the output of the adder 150, the control angle of the DC conversion station is adjusted for suppressing the shaft torsional vibration.

4. 发明专利

JP2010193535A Apparatus for stabilizing non-linear system 审中-公开
标题翻译：用于稳定非线性系统的装置
公开(公告)号：JP2010193535A
公开(公告)日：2010-09-02
申请号：JP2009032125
申请日：2009-02-16
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SEKOGUCHI MASAHIRO , FUKUI CHIHIRO , AIHARA TAKASHI
IPC分类号： H02J3/24 , H02J3/18
CPC分类号： Y02E40/30
摘要： PROBLEM TO BE SOLVED: To provide an apparatus for stabilizing a non-linear system, capable of estimating an internal phase angle of a generator from information available in a sub-station, and suppressing fluctuation in power by output of an optimal control gain, even if the variation of generator effective power enters a non-linear region due to an increase in the variation in generator phase angle. SOLUTION: The apparatus uses an estimated generator effective power output value, an estimated generater internal voltage value, an estimated generater frequency value, an estimated generator internal phase angle value, an estimated system voltage value and a system impedance as auxiliary input into a reactive power compensator so that variation in a phase angle after a fault can be maintained within a predetermined value, and operates a control amount of stabilization control on the basis of a strict linearizing method based on differential geometry. By doing this, even if the generator output enters a region indicating non-linear characteristics, a fluctuation suppressing effect is not reduced, and a generator phase angle and the fluctuation of sub-station voltage after a system fault can be promptly stabilized. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于稳定非线性系统的装置，其能够根据子站中可用的信息估计发电机的内部相位角，并通过输出最佳控制来抑制功率波动增益，即使发电机有效功率的变化由于发电机相位角的变化的增加而进入非线性区域。解决方案：该装置使用估计的发电机有效功率输出值，估计的发电机内部电压值，估计的发电机频率值，估计的发电机内部相位角值，估计的系统电压值和系统阻抗作为辅助输入无功补偿器，使得故障之后的相位角的变化可以保持在预定值内，并且基于基于差分几何的严格线性化方法来操作稳定控制的控制量。通过这样做，即使发电机输出进入表示非线性特性的区域，也不会降低波动抑制效果，并且可以迅速地稳定发电机相位角和系统故障后的子站电压的波动。版权所有（C）2010，JPO＆INPIT

5. 发明专利

JP2009005528A Current-limiting device 有权
标题翻译：电流限制器件
公开(公告)号：JP2009005528A
公开(公告)日：2009-01-08
申请号：JP2007165439
申请日：2007-06-22
申请人： Chubu Electric Power Co Inc , Hitachi Ltd , 中部電力株式会社 , 株式会社日立製作所
发明人： SEKOGUCHI MASAHIRO , KONISHI HIROO , HATANO RYOSUKE , NAKACHI YOSHINORI
IPC分类号： H02H9/02
摘要： PROBLEM TO BE SOLVED: To provide a current-limiting device that exhibits prescribed current-limiting effects during failures such as a short-circuit and a ground fault while ensuring the stability of a power system in which two power-supply bus-bars are connected. SOLUTION: A series transformer 11 is configured that a primary side 7 is connected to a bus tie between system AC bus-bars 4, 5 while a secondary side 8 is made as an excitation winding. The series transformer is connected with a current-limiting reactor 6 in series. The secondary side 8 is excited by an exciting circuit from an adjusting transformer 9 so that an inter-terminal voltage drop of the current-limiting reactor 6 in the normal condition is canceled with a both-end voltage of the primary side 7 of the series transformer 11. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种在诸如短路和接地故障的故障期间表现出规定的限流效应的限流装置，同时确保电力系统的稳定性，其中两个电源总线 - 酒吧连接。
解决方案：串联变压器11被构造成使得初级侧7连接到系统AC母线4,5之间的母线，而次级侧8被制成励磁绕组。串联变压器与限流电抗器6串联连接。次级侧8由来自调节变压器9的励磁电路激励，使得限流电抗器6在正常状态下的端子间电压降被串联的初级侧7的两端电压消除变压器11.版权所有（C）2009，JPO＆INPIT

6. 发明专利

JPH01165994A NUCLEAR REACTOR STOP SYSTEM OPERATION DEVICE 失效
公开(公告)号：JPH01165994A
公开(公告)日：1989-06-29
申请号：JP32404487
申请日：1987-12-23
申请人： HITACHI LTD
发明人： SEKOGUCHI MASAHIRO
IPC分类号： G21C7/16
摘要： PURPOSE:To check the magnetizing rush current of a solenoid and obtain a device in which the capacity of a stationary power source device is used to a necessary minimum by inserting an oversaturation reactor in an excitation circuit of the solenoid. CONSTITUTION:An oversaturation reactor 2 is inserted in an excitation circuit composed of a stationary uninterruptive constant frequency constant voltage power source 1, contacts 6A1-6A4 of contactors 5A-5D, solenoids 7A1-7A21 of a scram pilot valve and the like. The contacts 3A-3N of an auxiliary relay opened in the abnormal time of a plant correspond to scram signals. When a manual reset switch is operated and contacts 4A, 4B are closed, the contacts 6A1-6A4 of the contactors 5A-5D are closed and at the same time the solenoids 7A1-7A21 are excited. Since at this time the making phase of applied voltage VL is pi/2 by the action of the oversaturation reactor 2, exciting rush current can be suppressed to a minimum.

7. 发明专利

JPS61161918A RECLOSING CONTROLLER 失效
公开(公告)号：JPS61161918A
公开(公告)日：1986-07-22
申请号：JP178685
申请日：1985-01-09
申请人： HITACHI LTD
发明人： SEKOGUCHI MASAHIRO
IPC分类号： H02H3/06

8. 发明专利

JP2011041354A Device and method for stabilizing system 有权
标题翻译：用于稳定系统的装置和方法
公开(公告)号：JP2011041354A
公开(公告)日：2011-02-24
申请号：JP2009184133
申请日：2009-08-07
申请人： Chubu Electric Power Co Inc , Hitachi Ltd , 中部電力株式会社 , 株式会社日立製作所
发明人： SEKOGUCHI MASAHIRO , FUKUI CHIHIRO , KUROSAWA KOICHI , CHO KEN , SUZUKI KOJI , HIRANO DAIGO , SHIMOMURA KIMIHIKO
IPC分类号： H02J3/24 , H02J3/00 , H02J3/16
CPC分类号： Y02E40/34
摘要： PROBLEM TO BE SOLVED: To solve a phase angle stability problem and a voltage problem since a bus voltage of a substation over-rises due to a fluctuation of a phase angle inside a generator by a disturbance of the generator and a large fluctuation of a power line stream if power limit control is performed when a system breaks down although a large amount of power capacitors are used for maintaining a bus voltage of the substation at stationary time in the power system transmitting a power from a large capacity power supply at a remote place. SOLUTION: A system stabilizing device is provided with database storing data obtained by previously calculating a power control amount at the power station at an assumed accident and a phase modification control amount at the substation operating/interrupting a phase modification facility by using an electric circuit model of the electric system and online data. The device is provided with a restoration/confirmation means for a reduction gradient of phase angle fluctuation of the generator and a substation bus voltage at the system accident by a previous operation. When fault information of the system is received, phase modification control is performed based on the substation phase modulation control amount corresponding to the fault which is read from the database and data on its execution timing. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：为了解决由于发电机的干扰引起的发电机内相位角的波动，变电站的母线电压的波动过大以及波动大的问题，如果在系统故障时执行功率限制控制，则在电力系统中从大容量电源传输电力的情况下，在大量电力系统中使用大量的功率电容器来维持变电站的总线电压在静止时间，一个偏远的地方。解决方案：系统稳定装置具有数据库存储数据，所述数据库存储数据是通过预先计算假设事故时在发电站处的功率控制量和变电站的相位修改控制量而操作/中断相位修改设备而获得的，电气系统电路模型和在线数据。该装置具有恢复/确认装置，用于通过先前的操作在系统事故期间发生发电机的相位角波动的减小梯度和变电站总线电压。当接收到系统的故障信息时，根据与从数据库读取的故障对应的变电站相位调制控制量及其执行定时数据，进行相位修正控制。版权所有（C）2011，JPO＆INPIT

9. 发明专利

JPS62281798A POWER LOAD UNBALANCE DETECTION CIRCUIT 失效
公开(公告)号：JPS62281798A
公开(公告)日：1987-12-07
申请号：JP12109886
申请日：1986-05-28
申请人： HITACHI LTD
发明人： SEKOGUCHI MASAHIRO
IPC分类号： H02P9/04 , H02P9/00
摘要： PURPOSE:To eliminate the possibility of malfunctioning a power load imbalance detection circuit, by supplementing a reclosing no-voltage time detection circuit to the power load unbalance detection circuit. CONSTITUTION:A power load unbalance detection circuit detects the generator current as the generator output. It also detects the intermediate vapor pressure as the input energy from a turbine. When the decreasing rate of generator current exceeds 40%/10m sec and its decreasing range 40%/10mm sec, a power load unbalance relay 16 actuates. So does a vapour governor 2. At the same time, a bypass valve 3 is closed so abruptly as to shift to an inhouse isolated operation in a power station. During reclosing no-voltage period the condition to turn OFF from a transmission line protective relay device 12 is given to the power load balance detection circuit as a locking condition, by which the shift to the unnecessary inhouse isolation operation can be prevented.

10. 发明专利

JP2012034452A Smart grid monitoring control method and device 有权
标题翻译：智能监控控制方法和设备
公开(公告)号：JP2012034452A
公开(公告)日：2012-02-16
申请号：JP2010170013
申请日：2010-07-29
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SEKOGUCHI MASAHIRO , FUKUI CHIHIRO , YAMADA TETSUO
IPC分类号： H02J3/38
CPC分类号： H02J3/38 , H02J2003/388
摘要： PROBLEM TO BE SOLVED: To provide a monitoring control method and device capable of stably and efficiently performing frequency control of distributed power supplies in a smart grid in coordination with a commercial power system.SOLUTION: The smart grid monitoring control device comprises a plurality of generators and loads, and is operated in cooperation with a commercial power system through a cooperation circuit breaker. The device includes a frequency control capability calculation unit which calculates a frequency control capability of a coordinated system using total power demand and a bus frequency, and an independent/cooperative operation detecting unit which calculates a frequency control capability of the commercial power system from the frequency control capability of the system from the frequency control capability calculation unit, for determining cooperative or independent operation based on the magnitude of the capability.
摘要翻译：要解决的问题：提供一种能够与商用电力系统协调地稳定且有效地执行智能电网中的分布式电力的频率控制的监视控制方法和装置。智能电网监控控制装置包括多个发电机和负载，并通过协作断路器与商用电力系统协同工作。该装置包括频率控制能力计算单元，其使用总功率需求和总线频率来计算协调系统的频率控制能力，以及独立/协作操作检测单元，其从频率计算商用电力系统的频率控制能力来自频率控制能力计算单元的系统的控制能力，用于基于能力的大小来确定协作或独立操作。版权所有（C）2012，JPO＆INPIT

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