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1. 发明专利

JP2003102130A POWER STORAGE SYSTEM 审中-公开
公开(公告)号：JP2003102130A
公开(公告)日：2003-04-04
申请号：JP2001287733
申请日：2001-09-20
申请人： TOHOKU ELECTRIC POWER CO , HITACHI LTD
发明人： URANO KIMIO , SATO TAKU , WAKU HIDEKI , KIYOFUJI YASUHIRO , AIHARA TAKASHI , MADORI IWAO , ISHIDA YUJI , ICHINOSE MASAYA
IPC分类号： H02J3/32 , H02J3/16 , H02J3/18
摘要： PROBLEM TO BE SOLVED: To provide a high reliability power storage system by adding a function for reducing flickers of a linkage system, in a arrange which will not influence the operation, although the power storage system is normally used for equalizing a load. SOLUTION: In a control system of an A/D converter 10 in the power storage system, a positive phase voltage 14 (e.g., effective value of the fundamental wave for the past 20 ms) is calculated continuously from a voltage at a battery system linkage point 6 by using DFT (Discrete Fourier Transform), a PQ vector control (a control for independently self-regulating active and reactive power of a self-excited converter to an arbitrary PQ instruction value) is implemented, by using the positive phase voltage at the linkage point as a reference, and the flickers are suppressed by filtering the positive phase voltage by using a high-pass filter, multiplying a filtered signal by the gain and adding the multiplied result to a horizontal axis current regulating part of the PQ vector control as a correction quantity.

2. 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

3. 发明专利

JP2004153957A Power conversion apparatus 有权
公开(公告)号：JP2004153957A
公开(公告)日：2004-05-27
申请号：JP2002317638
申请日：2002-10-31
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： KIYOFUJI YASUHIRO , AIHARA TAKASHI , KAWABATA KATSUTO , ONOSE TAKAYUKI , ISHIDA YUJI , URANO KIMIO , SATO TAKU , WAKU HIDEKI
IPC分类号： H02M7/48
摘要： PROBLEM TO BE SOLVED: To provide a power conversion apparatus capable of preventing the occurrence of an excess current by quickly responding if an abnormality occurs in a grid to abruptly change a grid voltage, and suppressing the output of an unbalance component or a harmonic component in a normal time. SOLUTION: Filters 15 and 16 input a detection voltage of the grid through a three-phase/dq axes converter 5. A grid abnormality determination means 17 inputs one of the outputs of the three-phase/dq axes converter 5, and outputs a time constant switching command to the filters 15 and 16 when the change rate exceeds a prescribed value. The filters 15 and 16 switch a response time constant to a long value in a normal time or to a short value at grid abnormality under the time constant switching command. COPYRIGHT: (C)2004,JPO

4. 发明专利

JP2001268798A ELECTRIC POWER STORING SYSTEM 失效
公开(公告)号：JP2001268798A
公开(公告)日：2001-09-28
申请号：JP2000079300
申请日：2000-03-16
申请人： HITACHI LTD , TOHOKU ELECTRIC POWER CO
发明人： KIYOFUJI YASUHIRO , AIHARA TAKASHI , MADORI IWAO , TOYODA MASASHI , SUGIURA YASUYUKI , ICHINOSE MASAYA , FUTAMI MOTOO , UEDA SHIGETA , URANO KIMIO , SATO TAKU , WAKU HIDEKI , YAGI MAKOTO
IPC分类号： H02H3/16 , H02H3/20 , H02J3/12 , H02J3/32 , H02J15/00 , H02M7/48
摘要： PROBLEM TO BE SOLVED: To improve operation continuity and safety (sure protective stop) when an accident is generated in a linked AC system of electric power storing system. SOLUTION: The electric power storing system equipped with an AC-DC converting apparatus 2 and a secondary battery 3 is connected with a connection point 8 of a three-phase AC system 1. Each of the line voltages of the connection point 8 is inputted in a positive phase voltage detecting part 4, which performs discrete Fourier transformation and detects a positive phase voltage amplitude Vs and a positive phase voltage phase θs on the basis of the transformed real axis component and imaginary axis component. In order to adjust AC power outputted from the AC-DC converting apparatus 2, a power conversion control part 6 performs vector control of an output voltage Vc of the converting apparatus 2 on the basis of the positive phase component phase θs of a connection point voltage at the connection point 8, and maintains stable control when a system accident is generated. A protective stop judging part 5 outputs a stop signal and stops the electric power storing system, when generation of an accident necessary for protective stop like 3-line grand fault is judged on the basis of the positive phase component amplitude Vs of the connection point voltage.

5. 发明专利

JP2012249142A Passive optical network system, error correction control method therefor 审中-公开
标题翻译：被动光网络系统，其错误校正控制方法
公开(公告)号：JP2012249142A
公开(公告)日：2012-12-13
申请号：JP2011120216
申请日：2011-05-30
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SATO TAKU , KAZAWA TORU , KATO HISAYUKI , KIMURA MAKI , TAKAGI SHOTA , TANAKA TAKUHIRO
IPC分类号： H04L12/44
摘要： PROBLEM TO BE SOLVED: To eliminate or reduce the impact on signal transmission of incorrect emission, even if it occurs when an ONU transits to power saving state or is reset therefrom in a PON system.SOLUTION: An ONU comprises: a transfer unit which transfers an uplink signal to an OLT; an encoding processing unit which performs error correction encoding of the uplink signal; and a control unit which switches the processing in the encoding processing unit effectively when other ONU transits to power saving state or is reset therefrom. The OLT comprises: a transfer unit which transfers an uplink signal from the ONU to a host network; a decoding processing unit which performs error correction decoding of the uplink signal from the ONU where error correction encoding is performed, and a control unit which switches the processing in the decoding processing unit effectively when other ONU transits to power saving state or is reset therefrom.
摘要翻译：要解决的问题：即使发生在ONU转换到省电状态或者在PON系统中从ONU重置时，也可以消除或减少不正确发射对信号传输的影响。解决方案：ONU包括：传送单元，其将上行链路信号传送到OLT; 编码处理单元，执行所述上行链路信号的纠错编码; 以及控制单元，当其他ONU转换到省电状态或从其重置时，有效地切换编码处理单元中的处理。 OLT包括：传输单元，其将来自ONU的上行链路信号传送到主机网络; 解码处理单元，执行来自执行纠错编码的ONU的上行链路信号的纠错解码;以及控制单元，当其他ONU转换到省电状态或从其重置时，有效地切换解码处理单元中的处理。版权所有（C）2013，JPO＆INPIT

6. 发明专利

JP2012249056A Passive optical network system and its transmission control method 审中-公开
标题翻译：被动光网络系统及其传输控制方法
公开(公告)号：JP2012249056A
公开(公告)日：2012-12-13
申请号：JP2011118859
申请日：2011-05-27
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KIMURA MAKI , ITOKAWA NAOKI , KAZAWA TORU , TAKAGI SHOTA , TANAKA TAKUHIRO , SATO TAKU
IPC分类号： H04L12/44 , H04B10/08
摘要： PROBLEM TO BE SOLVED: To provide an ONU that prevents an unintended optical signal (false light emission) from occurring when shifting from or to a power saving mode.SOLUTION: A passive optical network (PON) system is comprised of an OLT and an ONU, and the OLT controls the ONU to shift to or from a sleep state. The ONU comprises: a signal transmission and reception unit for communicating with a communication terminal; an optical-electrical conversion unit for communicating with the OLT by an optical signal; a PON LSI for controlling data communication while the ONU is in operation and in a sleep period; a sleep control signal processing unit for analyzing a sleep control signal transmitted by the OLT; a sleep state control unit for controlling a shift to or from the sleep state; an optical switch for blocking or letting through an optical signal of the optical signal transmission unit; and an optical switch control unit for controlling the optical switch to block or let through.
摘要翻译：要解决的问题：提供一种防止在从省电模式转换到节电模式时发生意外的光信号（假发光）的ONU。解决方案：无源光网络（PON）系统由OLT和ONU组成，OLT控制ONU转移到睡眠状态或从睡眠状态转移。 ONU包括：用于与通信终端通信的信号发送和接收单元; 光电转换单元，用于通过光信号与OLT进行通信; 一个PON LSI，用于在ONU处于运行状态并在睡眠期间控制数据通信; 睡眠控制信号处理单元，用于分析由OLT发送的睡眠控制信号; 睡眠状态控制单元，用于控制到睡眠状态或从睡眠状态的移动; 光开关，用于阻断或通过光信号传输单元的光信号; 以及光开关控制单元，用于控制光开关阻塞或通过。版权所有（C）2013，JPO＆INPIT

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