公开(公告)号：US08400119B2

公开(公告)日：2013-03-19

申请号：US13169747

申请日：2011-06-27

Applicant: Lennart Angquist ,  Lars Paulsson ,  Ake Petersson ,  Bjorn Thordvaldsson

Inventor： Lennart Angquist ,  Lars Paulsson ,  Ake Petersson ,  Bjorn Thordvaldsson

IPC: G05F1/70 ,  G05F5/00

CPC classification number: H02J3/1864 ,  Y02E40/12

Abstract: A one-phase static var compensator apparatus includes a compensator string consisting of a first static var compensator connected serially to a thyristor valve. The compensator string is arranged to be connected on its first end to one phase of a transmission grid of a rated voltage exceeding 69 kV. Moreover, the thyristor valve includes a plurality of thyristors connected serially and the compensator string is arranged to be directly connected to the transmission grid. A corresponding three phase apparatus is also presented.

公开(公告)号：US08374810B2

公开(公告)日：2013-02-12

申请号：US13412393

申请日：2012-03-05

Applicant: Lennart Angquist

Inventor： Lennart Angquist

IPC: G01R19/00

CPC classification number: H02M7/483 ,  H02M7/49 ,  H02M2007/4835

Abstract: A method for calculating insertion indices for a phase leg of a DC to AC modular multilevel converter. Each phase leg includes two serially connected arms, wherein each arm includes a number of submodules, wherein each submodule can be in a bypass state or a voltage insert mode. The insertion index includes data representing the portion of available submodules that should be in the voltage insert mode. The method includes the steps of: calculating a desired arm voltage for an upper arm connected to the upper DC source common bar and a lower arm connected to the lower DC source common bar, obtaining values representing actual total arm voltages in the upper arm and lower arm, respectively, and calculating modulation indices for the upper and lower arm, respectively, using the respective desired arm voltage and the respective value representing the total actual arm voltage. A corresponding apparatus is also presented.

Abstract translation: 一种用于计算DC到AC模块化多电平转换器的相位支路的插入指数的方法。 每个相腿包括两个串联连接的臂，其中每个臂包括多个子模块，其中每个子模块可以处于旁路状态或电压插入模式。 插入索引包括表示应该处于电压插入模式的可用子模块部分的数据。 该方法包括以下步骤：计算连接到上直流源公共线的上臂的所需臂电压和连接到下直流源公共线的下臂，获得表示上臂和下部的实际总臂电压的值 并且分别使用各自期望的臂电压和表示总实际臂电压的相应值来计算上臂和下臂的调制指数。 还提出了相应的装置。

公开(公告)号：US20130009614A1

公开(公告)日：2013-01-10

申请号：US13614707

申请日：2012-09-13

Applicant: Lennart Angquist ,  Lars Paulsson ,  Ake Petersson ,  Bjorn Thordvaldsson

Inventor： Lennart Angquist ,  Lars Paulsson ,  Ake Petersson ,  Bjorn Thordvaldsson

IPC: G05F1/70

CPC classification number: H02J3/1864 ,  Y02E40/12

Abstract: A one-phase static var compensator apparatus includes a compensator string consisting of a first static var compensator connected serially to a thyristor valve. The compensator string is arranged to be connected on its first end to one phase of a transmission grid of a rated voltage exceeding 69 kV. Moreover, the thyristor valve includes a plurality of thyristors connected serially and the compensator string is arranged to be directly connected to the transmission grid. A corresponding three phase apparatus is also presented.

Abstract translation: 单相静态无功补偿装置包括由串联连接到晶闸管阀的第一静态无功补偿器组成的补偿器串。 补偿器串被布置成在其第一端连接到额定电压超过69kV的输电网的一相。 此外，晶闸管阀包括串联连接的多个晶闸管，并且补偿器串被布置为直接连接到传输格栅。 还提出了相应的三相设备。

公开(公告)号：US20120191391A1

公开(公告)日：2012-07-26

申请号：US13412393

申请日：2012-03-05

Applicant: Lennart Angquist

Inventor： Lennart Angquist

IPC: G06F19/00

CPC classification number: H02M7/483 ,  H02M7/49 ,  H02M2007/4835

Abstract: A method for calculating insertion indices for a phase leg of a DC to AC modular multilevel converter. Each phase leg includes two serially connected arms, wherein each arm includes a number of submodules, wherein each submodule can be in a bypass state or a voltage insert mode. The insertion index includes data representing the portion of available submodules that should be in the voltage insert mode. The method includes the steps of: calculating a desired arm voltage for an upper arm connected to the upper DC source common bar and a lower arm connected to the lower DC source common bar, obtaining values representing actual total arm voltages in the upper arm and lower arm, respectively, and calculating modulation indices for the upper and lower arm, respectively, using the respective desired arm voltage and the respective value representing the total actual arm voltage. A corresponding apparatus is also presented.

Abstract translation: 一种用于计算DC到AC模块化多电平转换器的相位支路的插入指数的方法。 每个相腿包括两个串联连接的臂，其中每个臂包括多个子模块，其中每个子模块可以处于旁路状态或电压插入模式。 插入索引包括表示应该处于电压插入模式的可用子模块部分的数据。 该方法包括以下步骤：计算连接到上直流源公共线的上臂的所需臂电压和连接到下直流源公共线的下臂，获得表示上臂和下侧的实际总臂电压的值 并且分别使用各自期望的臂电压和表示总实际臂电压的相应值来计算上臂和下臂的调制指数。 还提出了相应的装置。

公开(公告)号：US6114841A

公开(公告)日：2000-09-05

申请号：US874035

申请日：1997-06-12

Applicant: Jean-Philippe Hasler ,  Thomas Johansson ,  Lennart Angquist

Inventor： Jean-Philippe Hasler ,  Thomas Johansson ,  Lennart Angquist

IPC: H02J3/01 ,  H02J3/18 ,  G05F1/70

CPC classification number: H02J3/1864 ,  Y02E40/12

Abstract: A device for compensation of the reactive power consumption of an industrial load, preferably an electric arc furnace or a plant for rolling of metallic materials, supplied from a three-phase (a, b, c) electric ac network, comprises a first compensation device for controllable consumption of reactive power and a second compensation device for generation of reactive power. The first compensation device comprises an inductor connected in series with a semiconductor connection controllable in dependence on a control order (.alpha.ref) supplied thereto. Control equipment is supplied with measured values of voltage (Ua, Ub, Uc) and current (Ia, Ib, Ic), respectively, at the load. The control equipment comprises devices for determination of the instantaneous consumption of active and reactive power by the load, and a control device which forms the control signal to the first compensation device in dependence on the consumption of reactive power and active power by the load.

Abstract translation: 一种用于补偿从三相（a，b，c）电气交流网络提供的工业负载，优选电弧炉或用于轧制金属材料的设备的无功功率消耗的装置，包括第一补偿装置 用于无功功率的可控制消耗和用于产生无功功率的第二补偿装置。 第一补偿装置包括与根据提供给其的控制顺序（αref）可控制的半导体连接串联连接的电感器。 控制设备在负载下分别提供电压（Ua，Ub，Uc）和电流（Ia，Ib，Ic）的测量值。 控制设备包括用于确定负载的有功和无功功率的瞬时消耗的装置，以及根据负载的无功功率和有功功率消耗形成控制信号给第一补偿装置的控制装置。

公开(公告)号：US5051684A

公开(公告)日：1991-09-24

申请号：US638329

申请日：1991-01-07

Applicant: Lennart Angquist

Inventor： Lennart Angquist

IPC: H02J3/18

CPC classification number: H02J3/1857 ,  Y02E40/26 ,  Y10T307/707

Abstract: A three-phase voltage stiff convertor (SR) has two six-pulse partial convertors (SR1, SR2). The alternating voltage terminals of the partial convertors are connected to a transformer (TR) with the aid of which the resultant alternating voltage of the converter is formed as the difference between the alternating voltages of the partial convertors. Each partial converter has a separate direct voltage source (C1, C2). The converter has control members (SD) which control the two partial convertors which a mutual phase displacement alternating between +150.degree. and -150.degree..

公开(公告)号：US4247888A

公开(公告)日：1981-01-27

申请号：US54053

申请日：1979-07-02

Applicant: Lennart Angquist

Inventor： Lennart Angquist

IPC: H02M1/12 ,  H02M1/15 ,  H02M7/757 ,  H02M1/14

CPC classification number: H02M7/7575 ,  H02M1/12 ,  H02M1/15 ,  Y02E60/60

Abstract: A static convertor with forced commutation is connected between an alternating voltage network and a direct voltage network. A filter is connected in parallel with a smoothing capacitor on the DC side of the convertor. The filter consists of the series-connection of an inductor, a filter capacitor and two controllable semiconductor valves that are connected in parallel in opposed relation. The natural frequency of the filter is higher than the product of the frequency of the alternating voltage network and the pulse number of the converter. The valves are made to carry current in time with the fundamental tone of the AC component present in the direct current of the convertor. In this way, the variations of the direct voltage of the convertor, caused by the AC direct current component, may be practically eliminated.

Abstract translation: 具有强制换向功能的静态转换器连接在交流电压网络和直流电压网络之间。 滤波器与转换器直流侧的平滑电容并联连接。 滤波器由电感器，滤波电容器和两个可相对应的并联连接的可控半导体阀的串联构成。 滤波器的固有频率高于交流电网络频率与转换器脉冲数的乘积。 这些阀被制成在转子的直流电中存在交流分量的基音时及时携带电流。 以这种方式，可以实际上消除由AC直流分量引起的转换器的直流电压的变化。