Method for operating converter circuit
    83.
    发明专利
    Method for operating converter circuit 审中-公开
    操作转换器电路的方法

    公开(公告)号:JP2008005694A

    公开(公告)日:2008-01-10

    申请号:JP2007153843

    申请日:2007-06-11

    CPC classification number: H02M1/32 G01R29/16 H02J3/1842 Y02E40/22

    Abstract: PROBLEM TO BE SOLVED: To protect a converter circuit when an asymmetric phase voltage occurs in an AC voltage network connected to the converter circuit.
    SOLUTION: The converter circuit has a converter unit 1, equipped with a plurality of controllable power semiconductor switches, and the converter unit 1 is connected on an AC-voltage side, to an AC-voltage network 2 and is controlled by a control signal S. For protecting the converter circuit, when an asymmetric phase voltage occurs in the AC-voltage network connected to the converter circuit, phase voltages (U
    Na , U
    Nb , U
    Nc ) in the AC-voltage network are calculated. Negative sequence strength of the phase voltage is calculated, and Park and Clark transformation strength of phase voltage is calculated; and when the negative sequence strength of the phase voltage exceeds a value that can be set; or if the Park and Clark transformation strength of the phase voltage drops beyond the value that can be set, the controllable power semiconductor switch will be locked by a control signal.
    COPYRIGHT: (C)2008,JPO&INPIT

    Abstract translation: 要解决的问题:为了在连接到转换器电路的交流电压网络中发生不对称相电压时保护转换器电路。 解决方案:转换器电路具有转换器单元1,其配备有多个可控功率半导体开关,并且转换器单元1在AC电压侧连接到AC电压网络2,并由一个 控制信号S.为了保护转换器电路,当在连接到转换器电路的AC电压网络中发生非对称相电压时,相电压(U SB SB,Nb SB) ,U Nc )。 计算相电压的负序强度,计算相电压的Park和Clark变换强度; 并且当相电压的负序强度超过可设定的值时; 或者如果相位电压的Park和Clark变换强度超过可设定的值,则可控功率半导体开关将被控制信号锁定。 版权所有(C)2008,JPO&INPIT

    Arc furnace power supply device
    84.
    发明专利
    Arc furnace power supply device 审中-公开
    电弧炉电源装置

    公开(公告)号:JP2007317651A

    公开(公告)日:2007-12-06

    申请号:JP2007112187

    申请日:2007-04-20

    CPC classification number: H05B7/144 H05B7/005 Y02P10/256 Y02P10/259

    Abstract: PROBLEM TO BE SOLVED: To provide an arc furnace power supply device in which stable and uniform arcs can be secured. SOLUTION: The arc furnace power supply device includes a commutator (1) which can be connected with an AC voltage supply network (2) on its AC voltage side and connected with a DC voltage circuit (3) on its DC voltage side. Furthermore, the arc furnace power supply device has an inverter (4) which is connected with the DC voltage circuit (3) on its DC voltage side and is connected with at least one arc electrode (5) on its AC voltage side. In order to improve a generation of stable and uniform arcs, the above inverter (4) is designed to give a rectangular AC voltage to the arc electrode (5). COPYRIGHT: (C)2008,JPO&INPIT

    Abstract translation: 要解决的问题:提供一种能够确保稳定且均匀的弧的电弧炉供电装置。 解决方案:电弧炉电源装置包括一个换向器(1),该换向器可以在其交流电压侧与一个交流电压网络(2)连接,并与其直流电压侧的直流电压电路(3)连接 。 此外,电弧炉供电装置具有逆变器(4),其在直流电压侧与直流电压电路(3)连接,并且在其交流电压侧与至少一个电弧电极(5)连接。 为了改善产生稳定和均匀的电弧,上述逆变器(4)被设计成向电弧电极(5)提供矩形AC电压。 版权所有(C)2008,JPO&INPIT

    Method for validity check of current transformer in switchgear, computer program and device, and switchgear provided with the device
    86.
    发明专利
    Method for validity check of current transformer in switchgear, computer program and device, and switchgear provided with the device 有权
    电流互感器在开关,计算机程序和器件中的有效性检查方法,以及器件提供的开关

    公开(公告)号:JP2003299215A

    公开(公告)日:2003-10-17

    申请号:JP2003085920

    申请日:2003-03-26

    CPC classification number: G01R31/085

    Abstract: PROBLEM TO BE SOLVED: To provide a method for improving and simplifying the monitoring of a current transformer in a switchgear, and to provide a computer program, a device and the switchgear provided with the device. SOLUTION: The instantaneous topology of the switchgear is grasped by a facility management system based on the existing electrical connection of the primary device and the instantaneous position of a switch (a), at least one zone of the switchgear is identified based on the instantaneous topology, while the zone is a region that is partitioned by at least one current transformer, in some cases, by the opened switch, and conductivity connected (b), in the zone, a measurement signal of the current transformer is detected by using a code that depends on the direction of a current and added to the total current of the zone (c), and, when the total current is not equal to zero in the allowable range of the measurement accuracy of the current transformer, all current transformers in related zones are identified to have problems (d). COPYRIGHT: (C)2004,JPO

    Abstract translation: 要解决的问题:提供一种用于改进和简化开关设备中的电流互感器的监视的方法,并且提供一种计算机程序,设备和设置有该设备的开关设备。 解决方案:开关柜的瞬时拓扑结构由设备管理系统基于主设备的现有电气连接和开关(a)的瞬时位置来掌握,开关柜的至少一个区域基于 瞬时拓扑,而区域是由至少一个电流互感器分隔的区域,在某些情况下,由打开的开关,并且导电性连接(b),在该区域中,电流互感器的测量信号被检测到 使用取决于电流方向并附加到区域(c)的总电流的代码,并且当总电流在电流互感器的测量精度的允许范围内不等于零时,所有电流 确定相关区域的变压器有问题(d)。 版权所有(C)2004,JPO

    METHOD FOR DRIVING POWER SEMICONDUCTOR
    87.
    发明专利

    公开(公告)号:JP2003179222A

    公开(公告)日:2003-06-27

    申请号:JP2002282332

    申请日:2002-09-27

    Applicant: ABB SCHWEIZ AG

    Abstract: PROBLEM TO BE SOLVED: To enable the optimum operation of an IGDT by being adapted to the characteristics of the IGDT. SOLUTION: An integrated gate dual transistor (IGDT) is equipped with controllable gates (G1 and G2), a first gate (G1) that is supplied to a cathode side and at the same time is driven by a first gate current via a first gate terminal having low inductance, and a second gate (G2) that is supplied to an anode side and at the same time is driven by a second gate current via a second gate terminal with low inductance. In the switch-off operation of the IGDT, the rate of rising in the voltage of the IGDT is restricted via the two gates. The restriction of the rate of rising in the voltage of the IGDT prevents the voltage from being increased at a different speed in the series circuit of the IGDT, thus preventing the overheat and breakdown of each IGDT due to a nonuniform load. COPYRIGHT: (C)2003,JPO

    METHOD FOR MATCHING VARIABLE DC VOLTAGE, AND CONVERSION CIRCUIT FACILITY FOR THE SAME

    公开(公告)号:JP2003111389A

    公开(公告)日:2003-04-11

    申请号:JP2002280435

    申请日:2002-09-26

    Applicant: ABB SCHWEIZ AG

    Abstract: PROBLEM TO BE SOLVED: To make substantially constant an intermediate circuit voltage by a three-point DC voltage middle circuit. SOLUTION: A converter circuit facility is the one for matching a variable DC voltage to a drive circuit, making a drive signal, and having a three-point DC voltage middle circuit (2). The three-point DC voltage middle circuit (2) is made of a first capacitor (3) and a second capacitor (4) connected in series with it, one connection of the first capacitor (3) forms the upper connection (5) of the three-point DC voltage middle circuit (2), the first capacitor (3) forms a center point connection (6) at the junction with the second capacitor (4), and one connection of the second capacitor (4) forms the lower connection (7) of the three-point DC voltage intermediate circuit (2).

    COMBUSTOR
    89.
    发明专利

    公开(公告)号:JP2001090951A

    公开(公告)日:2001-04-03

    申请号:JP2000247547

    申请日:2000-08-17

    Applicant: ABB SCHWEIZ AG

    Abstract: PROBLEM TO BE SOLVED: To provide a combustor for especially driving a gas turbine in which instability of combustion can be suppressed while keeping a simple and reliable function by improving a combustor of such a type as having a large number of burners of identical thermal power output working in common combustion chambers in parallel with the axis. SOLUTION: A large number of burners 12, 13, 14, 15 are arranged differently such that flames 24, 25, 26, 27 produced therefrom or the flame fronts thereof are positioned to be distributed along the axis 28.

    ネットワーク化されたマイクログリッドのためのセキュアな分散型状態推定

    公开(公告)号:JP2022501994A

    公开(公告)日:2022-01-06

    申请号:JP2021517002

    申请日:2019-09-26

    Abstract: ネットワーク化されたマイクログリッドのシステム、方法、技術および装置が開示される。例示的な一実施形態は、ネットワーク化されたマイクログリッドシステムから偽データを除去するための方法であって、マイクログリッド制御システムで第1のローカル状態推定値を計算するステップと、マイクログリッド制御システムおよび複数のマイクログリッドで複数のグローバル状態推定値を計算するステップと、複数のグローバル状態推定値が収束しなかったと判断するステップと、マイクログリッド制御システムおよび複数のマイクログリッドを用いて、マイクログリッド制御システムで計算された複数のグローバル状態推定値のうちの第1のグローバル状態推定値における偽データを検出するステップと、複数のグローバル状態推定値から第1グローバル状態推定値を除去するステップと、複数のグローバル状態推定値のうち残りのグローバル状態推定値が収束するまで、マイクログリッド制御システムおよび複数のマイクログリッドで、複数のグローバル状態推定値のうち残りのグローバル状態推定値を反復的に更新するステップとを含む。

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