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公开(公告)号：EP4395108A1
公开(公告)日：2024-07-03
申请号：EP22860988.9
申请日：2022-07-05
申请人： Hitachi, Ltd.
IPC分类号： H02J7/00 , H01M50/50 , H01M50/509 , H01M50/583 , H02H7/18 , H02J7/02 , H02J7/04 , H02J13/00 , H02J15/00
CPC分类号： Y02E60/10 , H02J7/02 , H02J15/00 , H02J7/00 , H01M50/583 , H01M50/50 , H02J13/00 , H02J7/04 , H02H7/18 , H01M50/509
摘要： Application of a high voltage to a battery cell in which a current is cut off without using a DC/DC converter is suppressed. A battery pack system 10 includes a plurality of basic battery units 60 in which a plurality of battery cells 41 charged by a current supplied from a power supply are connected in series, and one or a plurality of battery groups 61 in which the plurality of basic battery units 60 are connected in parallel, each of the plurality of battery cells 41 includes a current cutoff means that cuts off a current flowing between electrodes of the battery cells 41, and a series number of the plurality of battery cells 41 connected in series of the basic battery unit 60 is determined based on a parallel number of the basic battery units 60, a current It supplied from the power supply, and a resistance component R of the battery cell 41.
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公开(公告)号：EP4216422A1
公开(公告)日：2023-07-26
申请号：EP20954196.0
申请日：2020-09-18
发明人： BANDO, Akira , KIKUI, Takahiko , WATANABE, Kenta , ITO, Tomomichi , KIYOFUJI, Yasuhiro , ISHIKAWA, Masakazu , NAKAIDE, Yosuke
IPC分类号： H02M7/49
摘要： A modular multilevel power converter includes: a capacitor voltage adjustment unit that calculates an active current component command to make an average voltage of capacitors match a command value; an active power detector that receives an AC current signal and an AC voltage signal and calculates an active power; an active power adjustment unit that calculates a DC current command value to make the active power match a command value; a first active power command suppressor that suppresses an absolute value of an active power command value to 0 or 0.2 times a rated DC current or less in a period in which an output level of a first level detector is 1, the first level detector switching the output level from 0 to 1 when a positive-phase voltage amplitude of a three-phase voltage becomes equal to or less than a first set value and switching the output level from 1 to 0 when a positive-phase voltage amplitude of the three-phase voltage becomes equal to or more than a second set value; and a second active power command suppressor that adjusts an absolute value of an active power command value to 0.3 times a rated DC current or more and 0.7 times the rated DC current or less in a period in which an output level of a second level detector is 1, the second level detector switching the output level from 0 to 1 when the negative-phase voltage amplitude of the three-phase voltage becomes equal to or more than a third set value and switching the output level from 1 to 0 when the negative-phase voltage amplitude becomes equal to or less than a fourth set value.
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公开(公告)号：EP4395157A1
公开(公告)日：2024-07-03
申请号：EP21954952.4
申请日：2021-08-23
发明人： BANDO, Akira , KIKUI, Takahiko , WATANABE, Kenta , KIYOFUJI, Yasuhiro , ISHIKAWA, Masakazu , ITO, Tomomichi , ICHINOSE, Masaya , NARUSHIMA, Jun , MEGURO, Hikaru
IPC分类号： H02P9/10 , H02P29/028
CPC分类号： H02P9/10 , H02P29/028
摘要： There is provided an adjustable speed generator motor system with full power converter (FPC system) in which two 3-level converters (1, 8) are connected back-to-back on the DC side as frequency converters, and by providing a mode in which a fly-wheeling diode is forced to conduct a current independently for three phases according to the current polarity when overcurrent is detected in an AC system-side 3-level converter (1) and a mode in which the fly-wheeling diode is forced to conduct a current independently for three phases according to magnitude relation of the absolute value of a 3-phase AC current in a generator motor-side 3-level converter (8) and the current polarity of each phase when an imbalanced value between positive and negative DC capacitor voltages (15, 16) exceeds a threshold, the FPC system is capable of continuing stable operation regardless of an occurrence point of a system-side fault and an accident mode.
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4.发明公开
公开(公告)号：EP3468027A1
公开(公告)日：2019-04-10
申请号：EP18198176.2
申请日：2018-10-02
申请人： Hitachi, Ltd.
发明人： KAWAZOE, Hironari , ITO, Tomomichi , KIKUCHI, Akira , WATANABE, Kenta , TANAKA, Chikara , KIYOFUJI, Yasuhiro
摘要： The invention is directed to a power conversion device including a main circuit unit (1) having a plurality of arms to which outputs of a plurality of converters (cells) are connected in series, a driving unit (105) (PWM control unit) which generates a driving signal for driving a plurality of semiconductor switching elements in the main circuit unit (1) according to a voltage command and outputs the signal to the plurality of semiconductor switching elements, an AC control unit (102) (AC current control unit) which generates AC voltage commands for the number of phases on a AC side for controlling AC power of a target to be controlled, and a DC control unit (103) (capacitor average voltage control unit) which generates a DC voltage command for setting an average value of DC voltages of the plurality of capacitors in the main circuit unit (1) to a predetermined value, in which the target to be controlled (rotating machine) is connected to the AC side of the main circuit unit (1), and a voltage command inputted by the driving unit (105) includes the AC voltage command and the DC voltage command.
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公开(公告)号：EP3290690A1
公开(公告)日：2018-03-07
申请号：EP17186656.9
申请日：2017-08-17
申请人： Hitachi, Ltd.
CPC分类号： F03D7/048 , F03D7/0204 , F03D7/0264 , F03D7/028 , F05B2270/20 , F05B2270/335 , Y02E10/721 , Y02E10/723
摘要： The purpose is to provide a wind farm that is capable of increasing power generation output or a control method of a wind farm.
In order to solve the problems, a wind farm 100 according to the present invention includes plural wind power generation apparatuses 10 each of which has: blades; a nacelle that supports the blades to make the blades rotatable; and a tower that supports the nacelle to make the nacelle rotatable in its yaw movement, the wind farm 100 including a control device 40 that, with the use of the wind condition information of the wind farm, the disposition information of first wind power generation apparatuses 10a, 10b that are stopping power generation and the disposition information of second wind power generation apparatuses 10c, 10d, 10e that are located on the leeward side of the first wind power generation apparatuses among all the wind power generation apparatuses, and the design information of the first wind power generation apparatuses, outputs a yaw angle designation value to the first wind power generation apparatuses or the second wind power generation apparatuses so that the generated electric energy of the wind farm becomes large.摘要翻译： 目的是提供能够增加发电输出的风电场或风电场的控制方法。 为了解决这些问题，根据本发明的风电场100包括多个风力发电设备10，每个风力发电设备10具有：叶片; 支撑叶片以使叶片可旋转的机舱; 以及支撑机舱以使机舱能够以其偏航运动旋转的塔架，风电场100包括控制装置40，该控制装置40利用风场的风况信息将第一风力发电装置的配置信息 10a，10b的设计信息以及位于所有风力发电设备中的第一风力发电设备的下风侧的第二风力发电设备10c，10d，10e的设置信息 第一风力发电设备向第一风力发电设备或第二风力发电设备输出偏航角指定值，使得风力发电场的发电电量变大。
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公开(公告)号：EP3718815A1
公开(公告)日：2020-10-07
申请号：EP18883265.3
申请日：2018-10-23
申请人： Hitachi, Ltd.
发明人： TAKAHASHI, Hirofumi , ANDOU, Shinsuke , NAKAHARA, Mizuki , KAWAGUCHI, Yuki , MABUCHI, Yuuichi , KANOUDA, Akihiko , NEMOTO, Ryo , KIKUCHI, Akira , ITO, Tomomichi
摘要： An object is to provide a reliable power management system. In order to solve the above problems, a power management system according to the invention includes a power supply unit that is arranged in a power supply facility, a first electric wire that is used to supply power to an overhead wire in contact with an electric vehicle, a first power conversion unit that can supply power supplied from the power supply unit to the first electric wire, a load that is disposed in a power consumption facility, a second electric wire that is used to supply power to the load, a calculation unit that calculates power consumption of the load, a second power conversion unit that connects the first electric wire and the power consumption facility and can supply power in one or both directions, and a control unit that controls the first power conversion unit based on the power consumption of the load calculated by the calculation unit and an available power supply amount of the power supply unit, and controls power supply to the first electric wire.
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7.发明公开
公开(公告)号：EP3661043A1
公开(公告)日：2020-06-03
申请号：EP19211807.3
申请日：2019-11-27
申请人： Hitachi, Ltd.
摘要： Main arms 10UP, 10VP, 10WP, 10UN, 10VN, and 10WN and sub-arms 11UP, 11VP, 11WP, 11UN, 11VN, and 11WN are provided for each of the P-side and N-side of each phase, the main arms 10UP, 10VP, 10WP, 10UN, 10VN, and 10WN and the sub-arms 11UP, 11VP, 11WP, 11UN, 11VN, and 11WN are connected in parallel for each of the P-side and N-side of each phase of the U-phase, V-phase, and W-phase, and the power conversion control unit 13 controls an inter-parallel arms circulation current that circulates between the main arms and the sub-arms, that are connected in parallel, in the same phase.
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公开(公告)号：EP3484009A1
公开(公告)日：2019-05-15
申请号：EP18200098.4
申请日：2018-10-12
申请人： Hitachi, Ltd.
摘要： The invention is directed to a hydropower generation system including a generator which is interconnected to a power system 102 via a frequency converter 104 and connected to a water turbine, a bypass breaker 103 which performs short-circuit of two AC output terminals 108a, 108b of the frequency converter 104, a control device 105 which controls the frequency converter 104 and the bypass breaker 103, and a voltage detector 110a, 110b which detects two AC voltages at both ends of the bypass breaker 103. The control device 105 adjusts an output voltage of the frequency converter 104 to a direction in which two AC voltage amplitudes at both ends of the bypass breaker 103 coincide with each other and two voltage phases at both ends of the bypass breaker 103 coincide with each other when the bypass breaker 103 is switched from opening to closing and outputs a closing command for closing the bypass breaker 103 when an amplitude difference and a phase difference of the two AC voltages at both ends of the bypass breaker 103 are within respective certain values.
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