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21. 发明专利

JP2013158155A Power converter, wind generator system, and control method therefor 审中-公开
标题翻译：电力转换器，风力发电机系统及其控制方法
公开(公告)号：JP2013158155A
公开(公告)日：2013-08-15
申请号：JP2012017426
申请日：2012-01-31
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： MABUCHI YUICHI , ICHINOSE MASAYA , MIYAGAWA RYOHEI
IPC分类号： H02P9/00
摘要： PROBLEM TO BE SOLVED: To provide a technique on a power converter capable of improving power generation efficiency by continuing the operation of a wind turbine and the power converter even when an overcurrent is detected.SOLUTION: The power converter includes a rotor-side converter, a system-side converter, a DC voltage circuit and a control circuit. Particularly, the DC voltage circuit has a resistor and a chopper circuit for consuming energy so that a negative-phase-sequence voltage on power system side is higher than a predetermined value and, when the system-side converter detects an overcurrent, stops the system-side converter and, when the negative-phase-sequence voltage on power system side is lower than the predetermined value, restarts the system-side converter.
摘要翻译：要解决的问题：提供一种能够通过继续风力涡轮机和功率转换器的运行而提高发电效率的技术，即使在检测到过电流时也是如此。电力转换器包括转子侧转换器，系统侧转换器，直流电压电路和控制电路。特别地，直流电压电路具有用于消耗能量的电阻器和斩波电路，使得电力系统侧的负相序电压高于预定值，并且当系统侧转换器检测到过电流时，停止系统并且当电力系统侧的负相序电压低于预定值时，重启系统侧转换器。

22. 发明专利

JP2011135708A Power supply system 审中-公开
标题翻译：电源系统
公开(公告)号：JP2011135708A
公开(公告)日：2011-07-07
申请号：JP2009293714
申请日：2009-12-25
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： TAKEDA KENJI , ICHINOSE MASAYA , MIYATA HIROAKI , KUNISADA HIDEAKI
IPC分类号： H02M7/12 , H02J9/06 , H02M7/48
摘要： PROBLEM TO BE SOLVED: To facilitate AC voltage regulation capable of reducing the system loss in a power supply system which can regulate the AC power supply voltage. SOLUTION: The power supply system includes a converter which converts an input AC power into a predetermined output AC power, wherein the converter is equipped with a system prediction means for predicting a change of efficiency or power in the system before the set values are changed with respect to the set values of variables which can be set in the system. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：为了方便交流电压调节，能够降低可调节交流电源电压的电源系统的系统损耗。解决方案：电源系统包括将输入AC电力转换为预定输出AC电力的转换器，其中转换器配备有系统预测装置，用于在设定值之前预测系统中的效率或功率的变化相对于可以在系统中设置的变量的设定值而改变。版权所有（C）2011，JPO＆INPIT

23. 发明专利

JP2011135707A Power supply system 审中-公开
标题翻译：电源系统
公开(公告)号：JP2011135707A
公开(公告)日：2011-07-07
申请号：JP2009293713
申请日：2009-12-25
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： TAKEDA KENJI , ICHINOSE MASAYA , MIYATA HIROAKI , KUNISADA HIDEAKI
IPC分类号： H02J9/06 , H02M7/48
摘要： PROBLEM TO BE SOLVED: To reduce power consumption of the entire power supply system. SOLUTION: The power supply system includes a converter which converts an input AC power into a predetermined output AC power, wherein the converter is equipped with a converter circuit which converts the input AC power into a predetermined DC power, an inverter circuit which converts the DC power into the output AC power, a DC circuit which connects the converter circuit with the inverter circuit, an input power measuring means for measuring the input AC power, and an output voltage regulation means for regulating the output voltage from the inverter circuit based on the input AC power, and the input AC power of the power supply system is minimized by regulating various set voltages in the power supply system while observing the input AC power of the power supply system. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：降低整个电源系统的功耗。解决方案：电源系统包括将输入交流电转换为预定输出交流电的转换器，其中转换器配备有将输入的交流电转换为预定的直流电的转换电路，逆变器电路将直流电力转换为输出交流电力，连接变换器电路与逆变器电路的直流电路，输入功率测量装置，用于测量输入交流电力;以及输出电压调节装置，用于调节逆变器电路的输出电压基于输入AC电力，并且通过在观察供电系统的输入AC电力的同时调节供电系统中的各种设定电压来最小化供电系统的输入AC电力。版权所有（C）2011，JPO＆INPIT

24. 发明专利

JP2011055569A Secondary excitation generator and secondary excitation variable speed generator motor 有权
标题翻译：二次发电机和二次发电变速发电机电机
公开(公告)号：JP2011055569A
公开(公告)日：2011-03-17
申请号：JP2009199193
申请日：2009-08-31
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： BANDO AKIRA , ICHINOSE MASAYA , KIYOFUJI YASUHIRO , NAKAYAMA YASUAKI
IPC分类号： H02P9/14 , H02P9/00
摘要： PROBLEM TO BE SOLVED: To resume secondary excitation control operation by minimizing current rating of a self arc-extinguishing element used for a secondary excitation power converter and minimizing a period when excitation control stops in failure of a system without short-circuiting a bypass circuit of an excitation side circuit of a rotor of an AC generator motor. SOLUTION: An excitation overcurrent detector of the AC excitation generator motor has a function for determining the magnitude relation of a three-phase excitation current, an ignition pulse is fixed so that a DC capacitor is charged by diode operation by the maximum phase of current and second large phase, a third phase is protected from short circuit between terminals of the DC capacitor by controlling conduction rate in accordance with a current detection value, and if the voltage of the DC capacitor exceeds a set value, the voltage value is suppressed by an active element or a passive element. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：通过使用于二次励磁功率转换器的自灭弧元件的电流额定值最小化来实现二次励磁控制操作，并且使得在不使系统短路的情况下励磁控制停止的期间最小化交流发电机电机的转子的励磁侧电路的旁路电路。解决方案：交流励磁发电机的励磁过电流检测器具有确定三相励磁电流大小关系的功能，点火脉冲固定，直流电容通过二极管工作由最大相充电的电流和第二大相，通过根据电流检测值控制导通率来保护第三相的直流电容器的端子之间的短路，并且如果直流电容器的电压超过设定值，则电压值为被有源元件或无源元件抑制。版权所有（C）2011，JPO＆INPIT

25. 发明专利

JP2011038499A Natural energy power generation control system, control device, and control method 有权
标题翻译：自然能源发电控制系统，控制装置和控制方法
公开(公告)号：JP2011038499A
公开(公告)日：2011-02-24
申请号：JP2009189296
申请日：2009-08-18
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ONO YASUNORI , UCHIYAMA MICHIYUKI , KONDO SHINICHI , ICHINOSE MASAYA , MATSUTAKE MITSUGI , AIHARA TAKASHI
IPC分类号： F03D9/00 , F03D1/04 , H01L31/042
CPC分类号： Y02E10/50 , Y02E10/725
摘要： PROBLEM TO BE SOLVED: To provide a technology predicting output fluctuation in a natural energy power generation site with high accuracy and stably supplying electric power. SOLUTION: A natural energy power generation control system 1 includes: a plurality of sites 500 provided with a plurality of power generators 510, an electric power measuring device 560 measuring output of the power generators, a weather condition measuring device 570 measuring a weather condition, and a monitor adjusting output from the power generators; and a centralized control device 300 calculating the upper limit of the total output of the plurality of sites from the weather condition of each site and assigning the calculated upper limit to the upper limit of each site. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种以高精度预测自然能发电站的输出波动并稳定地供电的技术。解决方案：自然能源发电控制系统1包括：设置有多个发电机510的多个地点500，测量发电机输出的电力测量装置560，测量发电机的天气状况测量装置570 天气条件和调节发电机输出的监视器; 以及集中控制装置300，从各站点的天气条件计算出多个站点的总输出的上限，并将计算的上限分配给每个站点的上限。版权所有（C）2011，JPO＆INPIT

26. 发明专利

JP2011038498A Wind farm control system, wind farm control device, and wind farm control method 有权
标题翻译：风力农场控制系统，风力农业控制装置和风力农业控制方法
公开(公告)号：JP2011038498A
公开(公告)日：2011-02-24
申请号：JP2009189295
申请日：2009-08-18
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KONDO SHINICHI , ONO YASUNORI , UCHIYAMA MICHIYUKI , ICHINOSE MASAYA , MATSUTAKE MITSUGI , AIHARA TAKASHI
IPC分类号： F03D7/04 , F03D9/00
CPC分类号： F03D7/047 , F03D7/0272 , F03D7/028 , F03D7/048 , F05B2260/821 , F05B2270/32 , F05B2270/321 , F05B2270/404 , Y02E10/723 , Y02E10/725
摘要： PROBLEM TO BE SOLVED: To provide a technology suppressing fluctuation of electricity output from a wind farm to an electricity system and maintaining a constant output.
SOLUTION: This wind farm control system 1 includes: the wind farm 100 provided with a plurality of wind power generators 11, 12, 13 with variable rotational speed, a meteorograph 21, 22, 23 juxtaposed to the wind power generators and monitoring a wind direction and wind power, and an individual control device 31, 32, 33 controlling the rotational speed of the wind power generator; and a centralized control device 40 calculating such a control level that the output of the wind farm is maintained constant for a predetermined period and giving instructions to each individual control device in order to control the rotational speed of each wind power generator according to the control level.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供抑制从风力发电场到电力系统的输出的波动的技术并保持恒定的输出的技术。解决方案：该风电场控制系统1包括：风力发电场100，设置有多个具有可变转速的风力发电机11,12,13，与风力发电机并置的监视器21,22,23 风向和风力，以及控制风力发电机的转速的单独控制装置31,32,33; 以及集中控制装置40，计算出风电场的输出在规定期间内保持恒定的控制电平，并向各个控制装置发出指示，以便根据控制电平控制各风力发电机的转速。版权所有（C）2011，JPO＆INPIT

27. 发明专利

JP2010213563A Wind power generation system 有权
标题翻译：风力发电系统
公开(公告)号：JP2010213563A
公开(公告)日：2010-09-24
申请号：JP2010027088
申请日：2010-02-10
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ICHINOSE MASAYA , FUTAMI MOTOO , SAKAI HIROMITSU , IMAIE KAZUHIRO
IPC分类号： H02P9/00
CPC分类号： H02P9/105
摘要： PROBLEM TO BE SOLVED: To solve the problem that a converter may be inoperable when a direct-current voltage of the converter rises before a rotor reaches an overcurrent level during generating low power. SOLUTION: In a wind power generation system, an alternating-current input of an overcurrent consumption apparatus used at system failure is connected between a generator rotor and an exciting converter, and a short circuit is operated at the system failure by detecting an exciting converter direct-current voltage rise. An exciting power converter of an alternating-current exciting generator is protected from an overcurrent caused by system disturbance, its operation is continued by connecting the alternating-current input of the short circuit (overcurrent consumption apparatus) between the generator rotor and the exciting converter, detecting system voltage drop and the exciting converter direct-current voltage rise and operating the overcurrent consumption apparatus. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：为了解决当在转换器产生低功率时转子达到过电流电平之前转换器的直流电压上升的情况下，转换器可能不可操作的问题。解决方案：在风力发电系统中，在系统故障时使用的过电流消耗装置的交流输入连接在发电机转子和励磁转换器之间，并且在系统故障时通过检测到励磁转换器直流电压上升。交流励磁发电机的励磁电力转换器被保护免受由系统干扰引起的过电流的影响，通过连接发电机转子和励磁转换器之间的短路（过电流消耗装置）的交流输入，继续运行，检测系统电压降和励磁转换器直流电压上升，并操作过流消耗装置。版权所有（C）2010，JPO＆INPIT

28. 发明专利

JP2010187482A Wind-power generation apparatus and control method thereof 有权
标题翻译：风力发电装置及其控制方法
公开(公告)号：JP2010187482A
公开(公告)日：2010-08-26
申请号：JP2009030560
申请日：2009-02-13
申请人： Hitachi Ltd , Kansai Electric Power Co Inc:The , 株式会社日立製作所 , 関西電力株式会社
发明人： NAKAYAMA YASUAKI , ICHINOSE MASAYA , FUTAMI MOTOO , OHARA SHINYA , HASEGAWA TSUTOMU , ISO OSAMU
IPC分类号： H02J3/38 , H02J3/24 , H02P9/00
CPC分类号： Y02E10/763
摘要： PROBLEM TO BE SOLVED: To suppress a power fluctuation in a synchronous generator of a power system by reactive power control in a wind-power generation apparatus. SOLUTION: A wind-power generation apparatus 100 includes a polyphase AC generator 106 which generates power by rotation of a windmill 108, a power converter 112 which controls the electric power generated by the generator to supply effective power and reactive power to a power system, a windmill control unit 110 which determines a blade angle command value and command values Pref and Qref of the effective power and reactive power, and a blade angle change unit 122 which changes an angle of a blade according to the blade angle command value. It includes an electric power fluctuation detecting device 116 which is electrically connected to a power system containing at least one synchronous generator 120 for detecting a power fluctuation in the synchronous generator 120, and a system stabilizing means (110+114) for suppressing the power fluctuation. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：通过风力发电装置中的无功功率控制来抑制电力系统的同步发电机的功率波动。解决方案：风力发电装置100包括通过风车108的旋转产生电力的多相交流发电机106，功率转换器112，其控制由发电机产生的电力以向无功功率提供有效功率和无功功率电力系统，确定叶片角度指令值和有效功率和无功功率的指令值Pref和Qref的风车控制单元110以及根据叶片角度指令值改变叶片角度的叶片角度改变单元122 。它包括电力波动检测装置116，其电连接到包含用于检测同步发电机120中的功率波动的至少一个同步发电机120的电力系统，以及用于抑制功率波动的系统稳定装置（110 + 114）。版权所有（C）2010，JPO＆INPIT

29. 发明专利

JP2009273281A Wind power generation system 有权
标题翻译：风力发电系统
公开(公告)号：JP2009273281A
公开(公告)日：2009-11-19
申请号：JP2008122844
申请日：2008-05-09
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ICHINOSE MASAYA , FUTAMI MOTOO , SAKAI HIROMITSU
IPC分类号： H02J3/38 , H02H7/06 , H02P9/00
CPC分类号： H02P9/007 , F03D9/255 , F05B2270/10711 , F05B2270/337 , H02P9/10 , H02P29/0241 , H02P29/032 , H02P2101/15 , Y02E10/72 , Y02P80/158
摘要： PROBLEM TO BE SOLVED: To solve the problem that, when an amount of power generated with a wind power generation system is small, a converter DC voltage is raised before a rotator reaches an overcurrent level and in some cases a converter can not be operated. SOLUTION: A drop in a system voltage and an increase in the DC voltage of an excitation converter are detected to operate an overcurrent consuming device at a time of accident of the system. Then, at the time of accident of the system, the AC input of the overcurrent consuming device is connected between a generator rotor and the excitation converter, and a drop in the system voltage and an increase in the DC voltage of the excitation converter are detected to allow the overcurrent consuming device to be operated at the time of accident of the system. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题为了解决当风力发电系统产生的电力量小时，转子直流电压在转子达到过电流水平之前升高，并且在某些情况下转换器不能操作。解决方案：在系统发生意外时，检测到系统电压下降和励磁转换器的直流电压的增加，以操作过电流消耗装置。然后，在系统发生时，过电流消耗装置的交流输入连接在发电机转子和励磁转换器之间，并且检测到系统电压的下降和激励转换器的直流电压的增加以允许在系统事故发生时操作过电流消耗装置。版权所有（C）2010，JPO＆INPIT

30. 发明专利

JP2008301584A Wind turbine generator system and control method for power converter 审中-公开
标题翻译：风力发电机系统及变流器控制方法
公开(公告)号：JP2008301584A
公开(公告)日：2008-12-11
申请号：JP2007142751
申请日：2007-05-30
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ICHINOSE MASAYA , OHARA SHINYA , FUTAMI MOTOO , MATSUTAKE MITSUGI , SAKAI HIROMITSU
IPC分类号： H02P9/00
CPC分类号： H02P9/10 , F03D9/255 , H02P29/0241 , H02P2101/15 , Y02E10/725
摘要： PROBLEM TO BE SOLVED: To contribute to power stabilization in an electric power system by supplying reactive current from a secondary excitation generator to the electric power system when the system fails. SOLUTION: When the system is disturbed, a power converter is stopped temporarily; and the power converter is restarted after detecting that the influence of an accident (stator overcurrent, stator direct-current component, rotor overcurrent, etc.) on the secondary excitation generator when the system fails has been eliminated. Thus, it is possible to output reactive current from the secondary excitation generator to the electric power system in safety without damaging the equipment in a wind turbine generator system even when the electric power system fails. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：当系统发生故障时，通过从次级励磁发电机向电力系统提供无功电流，有助于电力系统的功率稳定。解决方案：当系统受到干扰时，暂时停止电源转换器; 检测到在系统发生故障时事故（定子过电流，定子直流成分，转子过电流等）对二次励磁发电机的影响已经消除的情况下，重新启动电力转换器。因此，即使在电力系统发生故障的情况下，也可以安全地将次级励磁发电机的无功电流输出到电力系统而不损害风力发电机系统中的设备。版权所有（C）2009，JPO＆INPIT

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