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1. 发明专利

JP2012196012A Generator output estimation method, and system and program thereof 有权
标题翻译：发电机输出估算方法及其系统及程序
公开(公告)号：JP2012196012A
公开(公告)日：2012-10-11
申请号：JP2011056645
申请日：2011-03-15
申请人： Hitachi Ltd , Tokyo Electric Power Co Inc:The , 東京電力株式会社 , 株式会社日立製作所
发明人： AIHARA TAKASHI , KOBAYASHI YASUHIRO , WATANABE MASAHIRO , OGIWARA YOSHINORI , MABUCHI HIROYUKI , UTSUMI TETSUYA
IPC分类号： H02J3/00 , H02J13/00
摘要： PROBLEM TO BE SOLVED: To provide a generator output estimation method, and a system and a program thereof, which dispense with measurement because of frequent interruption of a generator even if there is secular and seasonal load fluctuation once a regression equation is acquired.SOLUTION: The estimation method of an output of a generator includes a first step for measuring electric quantity in an objective distribution line section, a second step for calculating a positive phase current and reverse phase current during a period while the generator is suspended, a third step for acquiring a regression equation of the positive phase current and the reverse phase current, a fourth step for acquiring a reverse phase current in a distribution line section, a fifth step for calculating an estimated value of the positive phase current during the period the generator is suspended, a sixth step for acquiring a positive phase current in the distribution line section during a period the generator is operated, and a seventh step for calculating a current deviation which is an output current of the generator. The regression equation of the positive phase current and the reverse phase current acquired in the third step is appropriately changed according to a secular and seasonal load fluctuation.
摘要翻译：要解决的问题：提供一种发电机输出估计方法及其系统和程序，其一旦获得回归方程，即使存在长期和季节性的负载波动，由于发电机的频繁中断而省去了测量。解决方案：发电机的输出的估计方法包括用于测量目标分配线路部分中的电量的第一步骤，用于在发电机暂停期间计算正相电流和反相电流的第二步骤用于获取正相电流和反相电流的回归方程的第三步骤，用于获取配电线路部分中的反相电流的第四步骤，用于计算所述正相电流和所述反相电流的正相电流的估计值的第五步骤，在发电机运转的期间，第六步骤，用于获取配电线路段中的正相电流;以及第七步骤，用于计算作为发电机的输出电流的电流偏差。根据季节性和季节性负荷波动，适当地改变在第三步骤中获取的正相电流和反相电流的回归方程。版权所有（C）2013，JPO＆INPIT

2. 发明专利

JP2010213513A Method and device for estimating generator output 有权
标题翻译：用于估计发电机输出的方法和装置
公开(公告)号：JP2010213513A
公开(公告)日：2010-09-24
申请号：JP2009058841
申请日：2009-03-12
申请人： Hitachi Ltd , Tokyo Electric Power Co Inc:The , 東京電力株式会社 , 株式会社日立製作所
发明人： AIHARA TAKASHI , KOBAYASHI YASUHIRO , WATANABE MASAHIRO , OGIWARA YOSHINORI , HIRAIWA NAOYA
IPC分类号： H02J3/00 , H02J13/00
摘要： PROBLEM TO BE SOLVED: To accurately estimate an output from a generator linked in a section by using information obtained from apparatuses (section switches or the like for measuring the amount of electricity such as a voltage, a current, a power factor or the like) being installed to transmission-distribution lines and measuring the amount of electricity. SOLUTION: The apparatuses measuring the amount of electricity containing the elements such as voltage, current and power factor are arranged in the target sections of the transmission-distribution lines, section inverted/normal phase currents during the stop of the generator are calculated and primary regression formula in a complex number showing the characteristics of a section load is prepared from the relationship between the phase currents. The section normal-phase current during the stop is estimated on the basis of the measured value of the section inverted-phase current during the operation of the generator and the primary regression formula, and the output (the current or an effective power) from the generator is estimated from the section normal-phase current during the operation of the generator and the difference. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：通过使用从设备获得的信息（用于测量诸如电压，电流，功率因数等的电量的部分开关等）来精确地估计来自连接在一个部件中的发电机的输出类似物）被安装到输配电线路上并测量电量。
解决方案：测量包含诸如电压，电流和功率因数的元件的电量的装置被布置在传输配线的目标部分中，计算发电机停止期间的部分反相/正相电流并且根据相电流之间的关系来准备表示部分负载的特性的复数中的初级回归公式。停止期间的正常相电流部分是根据发电机运行中的部分反相电流的测量值和初级回归公式估算出的，而输出（当前或有效功率）来自发电机在发电机运行期间的正常相电流和差值估算。版权所有（C）2010，JPO＆INPIT

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

JP2009247136A Power converter and method for controlling harmonic current of the power converter 有权
标题翻译：用于控制电力转换器谐波电流的功率转换器和方法
公开(公告)号：JP2009247136A
公开(公告)日：2009-10-22
申请号：JP2008091621
申请日：2008-03-31
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ITO TOMOMICHI , UCHIYAMA MICHIYUKI , KATO SHUJI , AIHARA TAKASHI , TANIGUCHI MASAHIRO , MIYATA HIROAKI
IPC分类号： H02J3/01 , H02M1/12
摘要： PROBLEM TO BE SOLVED: To provide a power converter which accurately suppresses the harmonic current of predetermined order flowing from a power system, even if voltage harmonics having a plurality of orders exist in a power system connected thereto. SOLUTION: The power converter includes: a converter part 100 in which its one end is connected to 165U, V, W of an AC system, and its other end is connected to loads for converting an AC power into a DC power; and a controller 104 for this converter part. A voltage detection value is input from a voltage detector 185 of the power system connected; the sine coefficients and the cosine coefficients of the voltage harmonic of the power system are extracted at a DFT501 by using Fourier series expansion; the voltage harmonic is restored from these coefficients at the DFT502 to add the restored value to an AC output voltage demand value of the converter part; and a voltage is generated which counteracts with the harmonics of the predetermined order in the AC system, thus suppressing the flow-in of the current of the predetermined order. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：即使在与其连接的电力系统中存在具有多个阶数的电压谐波，也能够提供精确地抑制从电力系统流出的规定次数的谐波电流的电力变换器。电源转换器包括：转换器部分100，其一端连接到AC系统的165U，V，W，另一端连接到用于将AC电力转换为DC电力的负载; 以及用于该转换器部件的控制器104。电压检测值从连接的电力系统的电压检测器185输入; 电力系统电压谐波的正弦系数和余弦系数通过傅立叶级数展开在DFT501提取; 在DFT502处从这些系数恢复电压谐波，将恢复的值添加到转换器部分的AC输出电压需求值; 并且产生与AC系统中的预定顺序的谐波抵消的电压，从而抑制预定顺序的电流的流入。版权所有（C）2010，JPO＆INPIT

5. 发明专利

JP2007282365A Flicker control device and flicker control method 有权
标题翻译：闪光控制装置和闪光灯控制方法
公开(公告)号：JP2007282365A
公开(公告)日：2007-10-25
申请号：JP2006104811
申请日：2006-04-06
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KOSEKI SHOICHIRO , ITO TOMOMICHI , AIHARA TAKASHI
IPC分类号： H02J3/16 , G05F1/66 , G05F1/70 , H02J3/18
CPC分类号： Y02E40/34
摘要： PROBLEM TO BE SOLVED: To provide a flicker control device and a flicker control method that stably continue the control of flicker, even if resonance by a fluctuation load is caused to occur. SOLUTION: The flicker control device 1 detects an effective current component of a load current and changes compensation rate according to the magnitude of the effective current component. A compensation current is calculated from the detected load current through a notch filter. The compensation current is calculated by subtracting a filter current estimated from an AC voltage. A voltage at the time when there is no load fluctuation is calculated to make a voltage control. Thus, this device becomes applicable even if capacitive devices including a harmonic filter are connected to a load circuit. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：即使发生由波动负载引起的共振，提供一种稳定地继续进行闪烁控制的闪烁控制装置和闪烁控制方法。解决方案：闪烁控制装置1检测负载电流的有效电流分量，并根据有效电流分量的大小改变补偿率。从检测到的负载电流通过陷波滤波器计算补偿电流。补偿电流通过减去从AC电压估计的滤波电流来计算。计算无负载波动时的电压进行电压控制。因此，即使包括谐波滤波器的电容性装置连接到负载电路，该装置变得适用。版权所有（C）2008，JPO＆INPIT

6. 发明专利

JP2005198461A Effective-power control device 有权
标题翻译：有效功率控制装置
公开(公告)号：JP2005198461A
公开(公告)日：2005-07-21
申请号：JP2004004295
申请日：2004-01-09
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： ONOSE TAKAYUKI , AIHARA TAKASHI , NAMATAME SATORU , URANO KIMIO , WAKU HIDEKI , SATO TAKU
IPC分类号： H02J3/38
摘要： PROBLEM TO BE SOLVED: To restrain generation of a reverse power flow without stopping the operation of an effective power output apparatus when the reverse power flow occurs. SOLUTION: Effective power (P Line ) 7 at a linkage point 3 is calculated from a voltage by an output of a transformer 14 and a current by an output of a current transformer 15 using an effective power calculating device 16. If the effective power (P Line ) 7 is negative, an effective-power control circuit 13takes it as a reverse flow being generated, performs control for narrowing down the output for an effective-power output apparatus 5 without stopping the operation of the effective-power output apparatus 5, and performs control so that the effective power (P Line ) 7 may be zero, thus restraining the reverse power flow immediately. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：在发生反向电力流时，抑制反向电力流的产生而不停止有效电力输出装置的操作。
解决方案：通过变压器14的输出的电压和电流互感器15的输出使用有效的电力来计算在点3处的有效功率（P 线）7 功率计算装置16.如果有效功率（P 线路）7为负，有效功率控制电路13将其作为产生的反向流动，执行用于缩小输出的控制，功率输出装置5，而不停止有效功率输出装置5的动作，进行有效功率（P 线路）7的控制，从而能够立即抑制反向功率流。版权所有（C）2005，JPO＆NCIPI

7. 发明专利

JP2004320860A Reactive power compensator 审中-公开
标题翻译：无功补偿器
公开(公告)号：JP2004320860A
公开(公告)日：2004-11-11
申请号：JP2003108999
申请日：2003-04-14
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： ONOSE TAKAYUKI , MAEDA EIICHIRO , AIHARA TAKASHI , MADORI IWAO , ISHIOKA OSAMU , ICHIKAWA YOSHINORI , FUSE TAKASHI , INAMURA SATOSHI
IPC分类号： H02J3/16 , G05F1/70 , H02J3/18
CPC分类号： Y02E10/763 , Y02E40/34
摘要： PROBLEM TO BE SOLVED: To stabilize a system voltage by reducing voltage fluctuation in a power system. SOLUTION: A reactive power from a voltage fluctuation suppressing circuit 27 and a reactive power value of the difference between a reactive power detection value and a reactive power command value are inputted in a reactive power compensator 25. A voltage fluctuation of a power grid decreases by such amount as the increase/decrease in the reactive power value outputted from the increase/decrease value of the reactive power of the reactive power compensator 25, and the value from a capacitor element 25C and a reactance element 25L is suppressed in the power system, resulting in a stabilized system voltage. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：通过减少电力系统中的电压波动来稳定系统电压。解决方案：来自电压波动抑制电路27的无功功率和无功功率检测值与无功功率指令值之间的差的无功功率值被输入到无功功率补偿器25中。功率的电压波动电网减少了从无功功率补偿器25的无功功率的上升/下降值输出的无功功率值的上升/下降量，并且抑制来自电容器元件25C和电抗元件25L的值电力系统，导致系统电压稳定。版权所有（C）2005，JPO＆NCIPI

8. 发明专利

JP2014103296A Estimation method of transformer characteristics 有权
标题翻译：变压器特性的估计方法
公开(公告)号：JP2014103296A
公开(公告)日：2014-06-05
申请号：JP2012255045
申请日：2012-11-21
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： AIHARA TAKASHI , TOKURA TOSHIYUKI , INAGAKI KEIZO , TOKUNAGA YOSHITAKA , ABE MINORU
IPC分类号： H01F41/00
摘要： PROBLEM TO BE SOLVED: To provide an estimation method of the transformer characteristics which allows for estimation of the % air core reactance or in-rush current of a transformer, by using the information that anyone can know.SOLUTION: An estimation method for knowing the unknown characteristics of a transformer comprises: an information collection organization step of making a regression equation representing the correlation of % short circuit impedance and % air core reactance, from the data of % short circuit impedance and % air core reactance, the data of a plurality of transformers being known in advance; and a characteristics estimation step of an unknown transformer for acquiring the value of % short circuit impedance, described in the faceplate of a transformer, for a transformer the value of air core reactance of which is unknown, and estimating the % air core reactance of the transformer by substituting the value of % short circuit impedance thud acquired into the regression equation.
摘要翻译：要解决的问题：提供允许通过使用任何人可以知道的信息来估计变压器的％空气磁芯电抗或浪涌电流的变压器特性的估计方法。解决方案：一种用于知道变压器的估计方法变压器的未知特性包括：信息收集组织步骤，根据％短路阻抗和％空心电抗的数据，形成代表％短路阻抗和％空心电抗的相关性的回归方程，多个数据的变压器提前知道; 以及未知变压器的特性估计步骤，用于获取变压器面板中描述的变压器的空心电抗值未知的％短路阻抗值，并估计变压器面板的空心电抗的％变压器通过将所获得的％短路阻抗值代入回归方程。

9. 发明专利

JP2011172484A Flicker suppression device 审中-公开
标题翻译：闪光抑制装置
公开(公告)号：JP2011172484A
公开(公告)日：2011-09-01
申请号：JP2011114280
申请日：2011-05-23
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KOSEKI SHOICHIRO , ITO TOMOMICHI , AIHARA TAKASHI
IPC分类号： H02J3/16 , G05F1/66 , G05F1/70 , H02J3/18
CPC分类号： Y02E40/34
摘要： PROBLEM TO BE SOLVED: To solve the problem with a flicker suppression device, wherein operation of the device becomes unstable as current flowing from the flicker suppression device to a load becomes excessive by a resonance frequency when a capacitive device such as a filter is connected to the load in parallel.
SOLUTION: The flicker suppression device detects an effective current component of a load current and changes a compensation rate according to the magnitude of the effective current component. A compensating current is calculated from the detected load current through a notch filter. The compensating current is calculated by deducting the estimated filter current from an AC voltage. By obtaining a voltage when there is no load change, the voltage is controlled. The flicker suppression device can be used even if a capacitive device such as a harmonic filter is connected to a load circuit.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：解决的问题为了解决闪烁抑制装置的问题，其中当诸如滤波器的电容性装置（例如滤波器）时，由于从闪烁抑制装置流向负载的电流由于共振频率而过度的装置的操作变得不稳定并联连接到负载。解决方案：闪烁抑制装置检测负载电流的有效电流分量，并根据有效电流分量的大小改变补偿率。从检测到的负载电流通过陷波滤波器计算补偿电流。通过从AC电压中扣除估计的滤波电流来计算补偿电流。通过在无负载变化时获得电压，可以控制电压。即使将诸如谐波滤波器的电容性装置连接到负载电路，也可以使用闪烁抑制装置。版权所有（C）2011，JPO＆INPIT

10. 发明专利

JP2011169732A Method and device for locating ground fault point of distribution line 有权
标题翻译：用于定位分布线地面故障点的方法和装置
公开(公告)号：JP2011169732A
公开(公告)日：2011-09-01
申请号：JP2010033558
申请日：2010-02-18
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： TAKAHASHI REIJI , YAMAZAKI MAKOTO , AIHARA TAKASHI , SUZUKI TSUTOMU , NAGANO MASAMI , HONGO YASUJI
IPC分类号： G01R31/08 , H02H3/00
摘要： PROBLEM TO BE SOLVED: To provide a method and device for locating a ground fault point of a distribution line by a capacitor addition method for accurately locating the ground fault point even when noise is in a measured current waveform.
SOLUTION: Ground accident current flowing in a capacitor disposed between the distribution line and the ground is measured, a first current is determined by eliminating a harmonic component, and the first current is Fourier-transformed to obtain the magnitude of the content included in each frequency band of a predetermined width. The frequency bands are ranked in the descending order of the content, the frequency bands between a maximum frequency band and a minimum frequency band are determined until a predetermined order, a second current which is the component of a frequency band between the maximum frequency band and minimum frequency bands is determined based on the first current, and a ground accident point of the distribution line is calculated based on the gradient of the second current.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于通过电容器添加方法来定位配线的接地故障点的方法和装置，用于即使当噪声处于测量的电流波形时也能精确地定位接地故障点。
解决方案：测量在配电线路和地线之间流过的电容器中的地面事故电流，通过消除谐波分量来确定第一电流，并对第一电流进行傅里叶变换，以获得包含的内容的大小在预定宽度的每个频带中。频带以内容的降序排列，确定最大频带和最小频带之间的频带，直到预定顺序为第二电流，第二电流是最大频带和最大频带之间的频带的分量基于第一电流确定最小频带，并且基于第二电流的梯度来计算配线的接地事故点。版权所有（C）2011，JPO＆INPIT

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