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1. 发明专利

JP2009044857A Apparatus and method for diagnosing stability of electric power system 有权
标题翻译：用于诊断电力系统稳定性的装置和方法
公开(公告)号：JP2009044857A
公开(公告)日：2009-02-26
申请号：JP2007206863
申请日：2007-08-08
申请人： Hitachi Ltd , Tohoku Electric Power Co Inc , 東北電力株式会社 , 株式会社日立製作所
发明人： SEKOGUCHI MASAHIRO , FUKUI CHIHIRO , MADORI IWAO , MAKINO JUNICHI , HANAMOTO KONOSUKE , KATAYAMA TAKASHI , TAKAHASHI CHIYOUEI , SHIRASAKI TAKASHI
IPC分类号： H02J3/00 , H02J3/24
摘要： PROBLEM TO BE SOLVED: To detect a dominant characteristic value corresponding to a system characteristic oscillation mode. SOLUTION: A power system stability diagnosis apparatus 12 extracts a dominant characteristic value from time-series observational data as follows: it computes a dominant mode power spectrum and a low-frequency noise range spectrum by a frequency component analyzing means 2; it computes the amount of a low-frequency noise component relative to a dominant mode component by a low-frequency noise amount determining means 3; it applies an autoregressive model and computes a characteristic value of each order by a characteristic value analyzing means 4; it screens them by a frequency screening means 5; and it changes and applies a dominant mode extraction technique according to the amount of the low-frequency noise component determined by the low-frequency noise amount determining means 3 and extracts the dominant characteristic value from among the multiple remaining characteristic values. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：检测与系统特性振荡模式对应的主要特性值。解决方案：电力系统稳定性诊断装置12从时间序列观测数据中提取主要特征值如下：其通过频率分量分析装置2计算主模式功率谱和低频噪声范围谱; 它通过低频噪声量确定装置3计算相对于主模式分量的低频噪声分量的量; 它应用自回归模型，并通过特征值分析装置4计算每个顺序的特征值; 它通过频率筛选装置5屏蔽它们; 并且根据由低频噪声量确定装置3确定的低频噪声分量的量改变并应用主模式提取技术，并从多个剩余特征值中提取主要特性值。版权所有（C）2009，JPO＆INPIT

2. 发明专利

JP2006101619A Power system stability diagnosis device, power system stabilizer, and power system contraction support device 有权
标题翻译：电力系统稳定性诊断装置，电力系统稳定器和电力系统承包支援装置
公开(公告)号：JP2006101619A
公开(公告)日：2006-04-13
申请号：JP2004283535
申请日：2004-09-29
申请人： Hitachi Ltd , Tohoku Electric Power Co Inc , 東北電力株式会社 , 株式会社日立製作所
发明人： SEKOGUCHI MASAHIRO , HARADA YASUSHI , MADORI IWAO , KATAYAMA TAKASHI , WAYAMA WATARU , TAMURA MITSUNARI , NIHEI ATSUSHI
IPC分类号： H02J3/00 , H02J3/24
摘要： PROBLEM TO BE SOLVED: To detect a dominant characteristic value having a system characteristic oscillation mode. SOLUTION: This power system stability diagnosis device 10 operates a characteristic value of each order by using a characteristic value analysis means 3 by applying an autoregressive model with respect to time series measurement data, performs screening to the operated characteristic value by a frequency screening means 4, and extracts the dominant characteristic value from a plurality of the remaining characteristic values by applying a dominant mode extraction method. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：检测具有系统特性振荡模式的主要特性值。解决方案：该电力系统稳定性诊断装置10通过使用特征值分析装置3对相对于时间序列测量数据应用自回归模型来操作各阶的特征值，对所操作的特征值进行频率的筛选筛选装置4，并且通过应用主模式提取方法从多个剩余特征值中提取主要特征值。版权所有（C）2006，JPO＆NCIPI

3. 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

4. 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

5. 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

6. 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

7. 发明专利

JP2011114956A Stable-operation control device for micro grid 审中-公开
标题翻译：用于微网的稳定操作控制装置
公开(公告)号：JP2011114956A
公开(公告)日：2011-06-09
申请号：JP2009269478
申请日：2009-11-27
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 , H02J13/00 , H02P9/04
CPC分类号： Y02E40/72 , Y04S10/12
摘要： PROBLEM TO BE SOLVED: To provide an effective and appropriate control method that stably and efficiently executes frequency control of distributed power supplies.
SOLUTION: A control method for distributed power supplies is configured as follows. When executing power fluctuation compensation by cooperatively controlling distributed power supplies respectively having following performance to changes in power demand, time-series data of load variations to be compensated and frequency variations are statistically analyzed. Consequently, the load variations are separated into controllable components and unpredictable load variations in frequency bands so as to maximally reduce an amount of compensation by making any one of the respective distributed power supplies share the load variations. The magnitude of the load variations to be shared and compensated by each distributed power supply is set so as to control the output of each distributed power supply, thereby compensating unpredictable random load variations in the frequency bands.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种稳定有效地执行分布式电源的频率控制的有效和适当的控制方法。解决方案：分布式电源的控制方法如下。通过协同控制对功率需求变化具有以下性能的分布式电源进行功率波动补偿时，统计分析要补偿的负载变化的时间序列数据和频率变化。因此，负载变化被分成可控组件和频带中不可预测的负载变化，以便通过使相应的分布式电源中的任一个共享负载变化来最大限度地减少补偿量。设定由各个分布式电源共享和补偿的负载变化的大小，以便控制每个分布式电源的输出，由此补偿频段中的不可预测的随机负载变化。版权所有（C）2011，JPO＆INPIT

8. 发明专利

JP2011019362A System stabilization system with posteriori correction function 有权
标题翻译：系统稳定系统具有定位校正功能
公开(公告)号：JP2011019362A
公开(公告)日：2011-01-27
申请号：JP2009163270
申请日：2009-07-10
申请人： Hitachi Ltd , Okinawa Electric Power Co Ltd , 株式会社日立製作所 , 沖縄電力株式会社
发明人： SEKOGUCHI MASAHIRO , KOMI YUTAKA , HIGA YASUSHI , YAMASATO KENICHIRO , KANESHIMA YASUHIRO , KANESHIRO FUMINAO , OYAMA TOSHIKATSU , NAKAMATSU HISAHIRO , MIYAGI YUKITO
IPC分类号： H02J3/24
摘要： PROBLEM TO BE SOLVED: To provide a system frequency stabilizing device which copes with many factors that arise, when accurately balancing between supply and demand, if the route of a trunk line is interrupted by a system accident.SOLUTION: A power system frequency stabilizing device 1 includes: a means for always measuring the output of generators 4 in a system and a load power-flow value of a main transformer substation; an accident-signal transmitting means for transmitting an accident signal to a system frequency stabilizing means, when an accident is detected; a part for preliminarily calculating a control amount that preliminarily calculates a control amount required, when the system accident occurs by using an electric-circuit model in the system and on-line data; and a correction control amount calculating part for calculating a correction control amount, on the basis of the generator drop amount, load drop amount, and observation value of a change in system frequency. Consequently, control with a required minimum control amount is executed and effects on the system based on excessive control are avoided, and thereby quick, stable, and accurate convergence of the frequency oscillation of a separated system to a target value is available.
摘要翻译：要解决的问题：提供一种系统频率稳定装置，能够在准确地平衡供需时，如果干线的路由被系统事故中断，则可以应付出现的许多因素。解决方案：一种电力系统频率稳定装置 1包括：用于总是测量系统中发电机4的输出和主变电站的负载功率流值的装置; 事故信号发送装置，用于当检测到事故时，将事故信号发送到系统频率稳定装置; 预先计算当通过使用系统中的电路模型发生系统事故和在线数据时预先计算所需的控制量的控制量的部分; 以及校正控制量计算部分，用于基于发电机下降量，负载下降量和系统频率变化的观测值来计算校正控制量。因此，执行具有所需最小控制量的控制，并且避免了基于过度控制的对系统的影响，从而可以将分离的系统的频率振荡的快速，稳定和准确的收敛到目标值。

9. 发明公开

EP2722960A4 MICROGRID CONTROL SYSTEM 有权
标题翻译：控制系统中的微电网
公开(公告)号：EP2722960A4
公开(公告)日：2015-03-11
申请号：EP11867900
申请日：2011-06-17
申请人： HITACHI LTD
发明人： WATANABE TOHRU , ATSUMI JUICHIRO , SEKOGUCHI MASAHIRO , KAMINAGA MASANORI , AIKAWA KOSHO , MAGOROKU HISAYUKI , NAKAMURA TOMOHARU , NAGAYAMA YUICHI , HIRASAWA SHIGEKI
IPC分类号： H02J3/46 , H02J3/00
CPC分类号： H02J3/00 , H02J3/383 , H02J3/46 , H02J7/35 , H02J13/0006 , H02J2003/003 , Y02E10/563 , Y02E10/566 , Y02E40/72 , Y04S10/123 , Y10T307/406
摘要： The present invention relates to a system for controlling microgrid facilities. In particular, the microgrid control system provided is capable of controlling multiple facilities according to characteristics of the facilities in order to achieve economic efficiency, environmental friendliness, and continued operability. The microgrid control system for controlling the operations of the multiple power facilities is provided with: a power supply activation/suspension planning unit that has a prediction unit for predicting outputs or loads of power supply facilities or load facilities and a prediction unit for predicting prediction errors contained therein; and an economical load allocation unit that determines command values related to the distribution of loads to be borne by currently running power supply facilities.

10. 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.

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