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1. 发明专利

JP2014050162A Conversion device for windmill, control device for windmill, method for controlling conversion device for windmill 审中-公开
标题翻译： WINDMILL的转换装置，WINDMILL的控制装置，用于控制WINDMILLL的转换装置的方法
公开(公告)号：JP2014050162A
公开(公告)日：2014-03-17
申请号：JP2012189421
申请日：2012-08-30
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NAKAFUTAMI SHINGO , MEGURO HIKARI
IPC分类号： H02J3/32
CPC分类号： Y02E10/766 , Y02E70/30
摘要： PROBLEM TO BE SOLVED: To allow a converter to be continuously operated by stabilizing power grid even if voltage drop of the power grid occurs.SOLUTION: A conversion device for a windmill has a grid voltage computation unit which determines a voltage state of power grid on the basis of information on a grid side voltage sensor and also has a reactive current command computation unit which outputs the reactive current command on the basis of information on a wind turbine control device WTC. The reactive current command computation unit is constituted so that the reactive current command outputted to the power grid in accordance with a voltage drop rate of the power grid is temporarily increased, and so that the follow-up time to a command value of the reactive current is changed.
摘要翻译：要解决的问题：即使发生电网的电压降，允许转换器通过稳定电网来连续运行。解决方案：风力发电机的转换装置具有电网电压计算单元，其确定电网的电压状态基于电网侧电压传感器的信息，并且还具有基于风力涡轮机控制装置WTC上的信息输出无功电流指令的无功电流指令运算部。无功电流指令计算单元构成为使得根据电网的电压降率输出到电网的无功电流指令暂时增加，并且使得无功电流的指令值的跟随时间改变了

2. 发明专利

JP2012170305A Wind generator system 审中-公开
标题翻译：风力发电机系统
公开(公告)号：JP2012170305A
公开(公告)日：2012-09-06
申请号：JP2011031512
申请日：2011-02-17
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ICHINOSE MASAYA , MATSUTAKE MITSUGU , KIYOFUJI YASUHIRO , MEGURO HIKARI
IPC分类号： H02P9/00
摘要： PROBLEM TO BE SOLVED: To protect an excitation power converter of an AC excitation type generator from overcurrent and DC overvoltage, which occur due to a system accident and system disturbance, and to operate the generator without detaching it from a system.SOLUTION: The system includes: an AC excitation converter 2042 connected to a rotor winding and a DC section of a converter 2041 on a system side; a converter controller 205 for controlling the converter 2041 on the system side and the AC excitation converter 2042; and an overcurrent consumption device 212 having an energy consumption section connected to the DC section via a short-circuit switch section and constituted of a plurality of resistors. The converter controller 205 is short-circuited by the short-circuit switch section and stops a gate of the AC excitation converter and allows excess current flow to the plurality of resistors of the energy consumption section when the excess current is detected by means detecting the current between the AC excitation generator and the AC excitation converter or DC voltage rise detecting means.
摘要翻译：要解决的问题：为了保护交流励磁发生器的励磁电力转换器免受由于系统事故和系统扰动而发生的过电流和直流过电压的影响，并且在不将其从系统中分离的情况下操作发电机。解决方案：该系统包括：连接到转子绕组的AC励磁转换器2042和系统侧的转换器2041的直流部分; 用于控制系统侧的转换器2041和AC激励转换器2042的转换器控制器205; 以及具有通过短路开关部连接到DC部分并由多个电阻器构成的能量消耗部分的过电流消耗装置212。转换器控制器205被短路开关部分短路，并停止AC励磁转换器的门，并且当通过检测电流的方式检测到过电流时，允许过剩电流流向能量消耗部分的多个电阻器交流励磁发电机和交流励磁变换器或直流电压上升检测装置之间。版权所有（C）2012，JPO＆INPIT

3. 发明专利

JP2009131122A Uninterruptible power supply device 有权
标题翻译：不间断电源设备
公开(公告)号：JP2009131122A
公开(公告)日：2009-06-11
申请号：JP2007306396
申请日：2007-11-27
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ICHIKAWA TOMOKAZU , TANIGUCHI YOSHIHIRO , MEGURO HIKARI
IPC分类号： H02J9/06 , H02M3/145 , H02M3/155
摘要： PROBLEM TO BE SOLVED: To provide an uninterruptible power supply device of lower cost and smaller size by reducing a discharge current flowing a DC-DC converter at commercial power source failure. SOLUTION: A DC-DC converter 5 that normally charges a storage battery steps up and discharges a storage battery 7 at commercial power source failure so that a DC power is supplied to an inverter 3. The operation of a converter 2 which converts AC to DC when a commercial power source is normal is stopped on the occurrence of failures with a commercial power source 1, and a switch 13 keeps the converter 2 and the storage battery 7 in connected state. Under this condition, a switching element 22 of the converter 2 operates in the same manner as the DC-DC converter 5, to allow the storage battery 7 to supply power to the inverter 3. With this configuration, a plurality of DC-DC converters are allowed to operate at commercial power source failure, reducing the currents flowing the DC-DC converter 5. The cost of the switching elements 21 and 22 can be reduced while the number of workers can be decreased, with a reactor for the DC-DC converters being miniaturized. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：通过减少在商业电源故障下流过DC-DC转换器的放电电流来提供更低成本和更小尺寸的不间断电源装置。解决方案：通常对蓄电池充电的DC-DC转换器5在商业电源故障时升压并放电蓄电池7，从而将DC电力提供给逆变器3.转换器2的操作，其转换在商业电源1发生故障时停止商用电源正常时的交流直流，开关13使转换器2和蓄电池7保持连接状态。在这种情况下，转换器2的开关元件22以与DC-DC转换器5相同的方式操作，以允许蓄电池7向逆变器3供电。利用这种配置，多个DC-DC转换器允许在商业电源故障下工作，减少流过DC-DC转换器5的电流。可以减少开关元件21和22的成本，同时可以减少工作人员的数量，使用DC-DC的电抗器转换器小型化。版权所有（C）2009，JPO＆INPIT

4. 发明专利

JP2008141815A Uninterruptible power supply system 有权
标题翻译：不间断电源系统
公开(公告)号：JP2008141815A
公开(公告)日：2008-06-19
申请号：JP2006323338
申请日：2006-11-30
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： HAGA KOJI , KIYOFUJI YASUHIRO , IWANAKA MITSUFUMI , MIYATA HIROAKI , MEGURO HIKARI , KUNISADA HIDEAKI
IPC分类号： H02J9/06
摘要： PROBLEM TO BE SOLVED: To stabilize the frequency of a private power generator even if the number of parallel driving UPS is increased/decreased, when the private power generator having a low inertia moment is used as an input power supply. SOLUTION: The attached illustration is a system configuration figure showing the private power generator 4, an AC/DC converter in the UPS and the control system of a chopper circuit. A variable frequency detection part 34 detects mechanical vibration frequency fss resulting from the inertia moment 23 of the private power generator 4 based on a system phase θg obtained by a voltage detector 26 to input the detected frequency into a BEF characteristic part 35. The BEF characteristic part 35 removes the ripple components of the mechanical vibration frequency fss from the DC voltage Edc output from the AC/DC converter 28 to feed it back to a DCAVR 30. Thereby, the DCAVR 30 performs constant voltage control of the DC voltage Edc of the AC/DC converter 28 while dispensing with the ripple components of the mechanical vibration frequency fss. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：即使并行驱动UPS的数量增加/减少，为了稳定私人发电机的频率，当将具有低惯性矩的私人发电机用作输入电源时。
解决方案：附图为系统配置图，显示了私人发电机4，UPS中的AC / DC转换器和斩波电路的控制系统。可变频率检测部分34基于由电压检测器26获得的系统相位θg来检测由私人发电机4的惯性矩23产生的机械振动频率fss，以将检测到的频率输入到BEF特征部分35中.BEF特性部分35从AC / DC转换器28输出的直流电压Edc中去除机械振动频率fss的纹波分量，以将其馈送回到DCAVR30。由此，DCAVR 30对DCAVR30的DC电压Edc进行恒定电压控制 AC / DC转换器28，同时分配机械振动频率fss的纹波分量。版权所有（C）2008，JPO＆INPIT

5. 发明专利

JP2011135706A Wind power generation system and control method thereof 有权
标题翻译：风力发电系统及其控制方法
公开(公告)号：JP2011135706A
公开(公告)日：2011-07-07
申请号：JP2009293706
申请日：2009-12-25
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NAKAYAMA YASUAKI , ICHINOSE MASAYA , MATSUTAKE MITSUGI , KIYOFUJI YASUHIRO , SAKAI HIROMITSU , MEGURO HIKARI
IPC分类号： H02P9/00 , H02J3/38
CPC分类号： Y02E10/723
摘要： PROBLEM TO BE SOLVED: To provide an AC-excited wind power generation system which prevents the overcurrent and overvoltage due to a failure of a synchronous circuit breaker by estimating the presence of failure of a synchronous circuit breaker in an AC-excited generator based on comparison of the system voltage with the stator voltage and stopping an operation of a power converter in the event of failure, and to provide a control method thereof. SOLUTION: With regard to a device which protects the AC-excited wind power generation system against the overcurrent and overvoltage by detecting a failure of a circuit breaker and stopping an operation of a converter when the circuit breaker of the AC-excited wind power generation system fails, and a control method thereof, a failure detection means for determining a failure from the operation signal of the circuit breaker, the stator voltage, and the system voltage is provided, and the operations of a system side converter and a converter for excitation are stopped when failure of the circuit breaker is detected. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种交流励磁风力发电系统，其通过估计交流励磁发电机中的同步断路器的故障的存在来防止由同步断路器故障引起的过电流和过电压基于系统电压与定子电压的比较，并且在故障的情况下停止功率转换器的操作，并提供其控制方法。
解决方案：关于通过检测断路器的故障并且在AC励磁风的断路器停止转换器的操作来保护交流励磁风力发电系统免受过电流和过电压的装置发电系统失效，并且提供其控制方法，用于从断路器的操作信号确定故障的故障检测装置，定子电压和系统电压，并且系统侧转换器和转换器的操作当检测到断路器故障时停止励磁。版权所有（C）2011，JPO＆INPIT

6. 发明专利

JP2006238514A Uninterruptible power supply device 审中-公开
标题翻译：不间断电源设备
公开(公告)号：JP2006238514A
公开(公告)日：2006-09-07
申请号：JP2005045452
申请日：2005-02-22
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ICHIKAWA TOMOKAZU , TANIGUCHI YOSHIHIRO , MEGURO HIKARI
IPC分类号： H02J9/06 , H02J7/00
摘要： PROBLEM TO BE SOLVED: To exactly make a diagnosis of the life of an accumulator irrespective of the degree of a load without installing an exclusive discharging circuit, in an uninterruptible power supply device having a converter that is not equipped with a regenerative function. SOLUTION: The uninterruptible power supply device comprises: the converter 2 that is not equipped with the regenerative function that converts an AC fed from a commercial power supply 1 to a DC; a smoothing capacitor 3 that smoothes the DC converted by the capacitor; an inverter 4 that converts the DC smoothed by the smoothing capacitor to an AC, and feeds it to the load; and the accumulator 8 that is connected, via a DC/DC converter 7, to a DC circuit to which the smoothing capacitor is connected. The uninterruptible power supply device is also characterized in that: a discharging current is made to flow to the smoothing capacitor from the accumulator by controlling the DC/DC converter, to raise a voltage of the smoothing capacitor; an accumulator diagnosis means 20 that makes a diagnosis of the life of the accumulator on the basis of the discharging current and an accumulator voltage at that time is arranged; and the discharging current is made to sufficiently flow by using the smoothing capacitor. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：在具有不具有再生功能的转换器的不间断电源装置中，为了在不安装专用放电电路的情况下对负载的程度进行诊断，而不考虑负载的程度。解决方案：不间断电源装置包括：转换器2，其不具备将从商用电源1馈送的AC转换成DC的再生功能; 平滑电容器3，其平滑由电容器转换的DC; 将由平滑电容器平滑的DC转换为AC并将其馈送到负载的反相器4; 以及经由DC / DC转换器7连接到连接了平滑电容器的DC电路的蓄电池8。不间断电源装置的特征还在于，通过控制DC / DC转换器使放电电流从蓄电池流向平滑电容器，以提高平滑电容器的电压; 蓄电池诊断装置20，其基于放电电流和此时的蓄电池电压来诊断蓄电池的寿命; 通过使用平滑电容器使放电电流充分流动。版权所有（C）2006，JPO＆NCIPI

7. 发明专利

JP2004236427A Uninterruptible power supply unit 有权
公开(公告)号：JP2004236427A
公开(公告)日：2004-08-19
申请号：JP2003021585
申请日：2003-01-30
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： IGARASHI HIROSHI , SHIMADA KEIZO , MEGURO HIKARI , TOYODA MASASHI
IPC分类号： H02J9/00 , H02J3/38 , H02J9/06
摘要： PROBLEM TO BE SOLVED: To provide an uninterruptible supply unit capable of realizing high reliability by performing dynamic soundness inspection for a power converter, maintenance bypass circuit or a bypass circuit. SOLUTION: An output switch 30 supplies power to a load 4 from the power converter 8 constituted of a converter 10 and an inverter 11, and the switch is kept in an open state. The output sides of the power converter 8 and a maintenance bypass circuit 24 or a bypass circuit 20 are electrically connected with each other for parallel operation of them, thus inspecting soundness by a current value from an output voltage difference between them. COPYRIGHT: (C)2004,JPO&NCIPI

8. 发明专利

JP2014027789A Power converter 审中-公开
标题翻译：电源转换器
公开(公告)号：JP2014027789A
公开(公告)日：2014-02-06
申请号：JP2012166459
申请日：2012-07-27
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： MIYAGAWA RYOHEI , MABUCHI YUICHI , MEGURO HIKARI
IPC分类号： H02P9/00 , H02H7/12
摘要： PROBLEM TO BE SOLVED: To provide a power converter with a downsized circuit capable of preventing breakage of a semiconductor switching element of energy consumption means which consumes excessive energy of a DC voltage circuit.SOLUTION: A power converter comprises: a DC voltage circuit; a rotor-side converter which converts a DC voltage of the DC voltage circuit to an AC voltage and supplies the AC voltage to a rotor wiring of a secondary exciting generator; a system-side converter which converts an AC voltage of a system wiring to a DC voltage and supplies the DC voltage to the DC voltage circuit; energy consumption means which consumes energy of the DC voltage circuit; and a voltage suppression circuit which detects and controls a terminal voltage of a semiconductor switching element. If the voltage of the DC voltage circuit increases due to inflow of excessive current from the rotor wiring side of the secondary exciting generator, the power converter turns on the energy consumption means to decrease the voltage of the DC voltage circuit to a voltage in a prescribed range. When the energy consumption means is turned off, the voltage suppression circuit suppresses a bouncing voltage when the semiconductor switching element is off.
摘要翻译：要解决的问题：提供一种功率转换器，其具有能够防止消耗DC电压电路的过多能量的能量消耗装置的半导体开关元件断裂的小型化电路。解决方案：电力转换器包括：直流电压电路; 转子侧转换器，将直流电压电路的直流电压转换为交流电压，并将交流电压提供给二次励磁发电机的转子配线; 系统侧转换器，其将系统布线的交流电压转换为直流电压，并将直流电压提供给直流电压电路; 能量消耗意味着消耗直流电压电路的能量; 以及电压抑制电路，其检测并控制半导体开关元件的端子电压。如果直流电压电路的电压由于来自二次励磁发电机的转子配线侧的过大电流的流入而增加，则电力转换器接通能量消耗装置，以将直流电压电路的电压降低到规定的电压范围。当能量消耗装置关闭时，当半导体开关元件断开时，电压抑制电路抑制跳动电压。

9. 发明专利

JP2012070537A Triggering method and device for power conversion device 审中-公开
标题翻译：用于功率转换器件的触发方法和装置
公开(公告)号：JP2012070537A
公开(公告)日：2012-04-05
申请号：JP2010213298
申请日：2010-09-24
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： MEGURO HIKARI , KIYOFUJI YASUHIRO , SHIOMI KEN , IWANAKA MITSUFUMI , ICHINOSE MASAYA
IPC分类号： H02M7/12
CPC分类号： Y02E10/56 , Y02E10/76
摘要： PROBLEM TO BE SOLVED: To provide a triggering method and a device for a power conversion device capable of precisely performing DC voltage response confirmation of a DC circuit at the time of triggering.SOLUTION: In the triggering device of a power conversion device, one end of a power converter is connected to an AC side while the other end is connected to a DC side, with a DC capacitor provided between DC side terminals. It includes initial charging means which applies an AC power source to the power converter for initially charging the DC capacitor, a control device which contains a voltage controller that performs integrating operation with a difference between DC voltage command and a measured DC voltage, for performing ignition angle control of the power converter, trigger operation means which increases the DC voltage command for the voltage controller on time base for triggering the power converter, response confirmation means which, during a trigger process by the trigger operation means, measures a voltage difference between the DC voltage command and the measured DC voltage or a time lag between the DC voltage command and the measured DC voltage, for confirming control response, and integration element excluding means which excludes an integration element of the control device during the period measurement is made by the response confirmation means, not to cause it to function.
摘要翻译：要解决的问题：提供一种能够在触发时精确地执行直流电路的直流电压响应确认的电力转换装置的触发方法和装置。解决方案：在电力转换装置的触发装置中，功率转换器的一端连接到AC侧，而另一端连接到DC侧，直流侧端子之间提供直流电容器。它包括初始充电装置，其将AC电源施加到功率转换器以初始对直流电容器充电;控制装置，其包含电压控制器，该电压控制器执行具有直流电压指令和测量直流电压之间的差异的积分运算，以进行点火电源转换器的角度控制，用于触发电力转换器的时基上增加电压控制器的直流电压指令的触发操作装置，响应确认装置，在触发操作装置的触发过程期间，测量电压转换器之间的电压差直流电压指令和测量的直流电压或直流电压指令与测量的直流电压之间的时间滞后，用于确认控制响应，以及在该周期测量期间不包括控制装置的积分元件的积分元件排除装置由响应确认手段，不使其发挥作用。版权所有（C）2012，JPO＆INPIT

10. 发明专利

JP2012016206A Method for detecting erroneous gate pulse wiring in power conversion apparatus 有权
标题翻译：用于检测功率转换装置中的错误门脉冲布线的方法
公开(公告)号：JP2012016206A
公开(公告)日：2012-01-19
申请号：JP2010151718
申请日：2010-07-02
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SHIOMI KEN , KIYOFUJI YASUHIRO , MEGURO HIKARI , IWANAKA MITSUFUMI , IMAZU YASUHIRO , YAMASHITA KOJIRO , MABUCHI YUICHI , MIYAGAWA RYOHEI , KOBAYAKAWA YASUYUKI , ONO KOTARO , TOKUDA MASAYUKI , MINE KENTA
IPC分类号： H02M7/12 , H02M1/00 , H02M7/48
摘要： PROBLEM TO BE SOLVED: To provide a method for detecting erroneous gate pulse wiring in a power conversion apparatus, making it possible to detect erroneous voltage detection wiring and erroneous switching wiring of arms due to operator's misunderstanding.SOLUTION: The power conversion apparatus, composed of plural semiconductor elements, has one end connected to a three-phase alternating-current power supply and the other end serving as direct current terminals, with a direct-current capacitor connected between the direct current terminals, and is provided with wiring for gate pulses to be applied from a control unit to the semiconductor elements. At one end of the power conversion apparatus, capacitors are connected between lines or in star form, and a reduced voltage is applied for a prescribed time to charge the direct-current capacitor before a gate pulse is applied in prescribed plural patterns from the control unit to the semiconductor elements. The currents in each phase of the three-phase alternating-current power supply at the time of pulse application are detected, and the relationship between the semiconductor elements to which the gate pulse was applied in plural patterns and the currents in each phase of the three-phase alternating-current power supply at this time is stored in memory. From the relationship stored in memory when wiring for gate pulses to be applied from the control unit to the semiconductor elements was sound and the relationship newly stored in memory by following the same procedure described above, an error in the wring used to apply gate pulses may be detected.
摘要翻译：要解决的问题：为了提供一种用于检测电力转换装置中的错误的门脉冲布线的方法，由于操作者的误解，可以检测错误的电压检测布线和错误的臂的切换布线。解决方案：由多个半导体元件组成的电力转换装置的一端连接到三相交流电源，另一端用作直流端子，直流电容器连接在直流电源电流端子，并且设置有用于从控制单元施加到半导体元件的栅极脉冲的布线。在功率转换装置的一端，电容器连接在线路或星形之间，并且在从控制单元以规定的多个模式施加栅极脉冲之前，将降低的电压施加规定时间以对直流电容器充电到半导体元件。检测在施加脉冲时三相交流电源的每相中的电流，并且以多个模式施加栅极脉冲的半导体元件与三相的每相中的电流之间的关系此时的相位交流电源被存储在存储器中。根据从控制单元施加到半导体元件的栅极脉冲的布线的声音以及通过遵循上述相同的过程新存储在存储器中的关系，存储在存储器中的关系，用于施加栅极脉冲的绞合中的误差可以被检测。版权所有（C）2012，JPO＆INPIT

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