公开(公告)号：US08872382B2

公开(公告)日：2014-10-28

申请号：US12323605

申请日：2008-11-26

Applicant: Antti Tarkiainen ,  Tero Viitanen

Inventor： Antti Tarkiainen ,  Tero Viitanen

IPC: H02J1/02 ,  H02J3/18 ,  H02J3/01

CPC classification number: H02J3/1835 ,  H02J3/01 ,  Y02E40/30 ,  Y02E40/40

Abstract: A system and a method for compensating harmonic components or a reactive power of an electrical network. The system comprises a measurement unit (1) configured to measure an electrical quantity to be compensated, a control unit (2) configured to determine harmonics contents or a reactive power need of the measured electrical quantity to be compensated as well as to determine, as relative values, desired values corresponding with the harmonics to be compensated or the reactive power to be compensated, one or more compensation units (5, 6) configured, responsive to the desired values provided by the control unit (2), to generate harmonic components or a reactive current according to the desired values given as relative values, and a communications connection (3) configured to communicate the desired values determined by the control unit (2) to the compensation units (5, 6).

Abstract translation: 用于补偿电网的谐波分量或无功功率的系统和方法。 该系统包括被配置为测量要补偿的电量的测量单元（1），被配置为确定待补偿的所测量的电量的谐波内容或无功功率需求的控制单元（2），并且确定为 相对值，与要补偿的谐波相对应的期望值或待补偿的无功功率，响应于由控制单元（2）提供的期望值而配置的一个或多个补偿单元（5,6），以产生谐波分量 或根据作为相对值给出的期望值的无功电流，以及被配置为将由控制单元（2）确定的期望值传送到补偿单元（5,6）的通信连接（3）。

公开(公告)号：US08319490B2

公开(公告)日：2012-11-27

申请号：US11862536

申请日：2007-09-27

Applicant: Tero Viitanen

Inventor： Tero Viitanen

IPC: G01R23/12

CPC classification number: H02P6/182

Abstract: A method of determining a rotational state of a three-phase alternating voltage supply which is connected to a converter and rotating in an uncontrolled manner, wherein the converter is connected to an intermediate voltage circuit and comprises phase-specific upper and lower controllable switches, which are connected in series between the intermediate voltage circuit, free-wheeling diodes connected in parallel with each of the controllable switches, and resistive circuits connected in parallel with the lower controllable switches. The method comprises the steps of selecting a voltage limit, comparing the voltages of the alternating voltage supply in the resistive circuits with the voltage limit, determining a first time instant when any of the voltages of the resistive circuits crosses the voltage limit, determining a second time instant when any of the voltages of the resistive circuits subsequently crosses the voltage limit, determining the phase sequence of the converter output phases from the phases that crossed the voltage limit at the first and second time instants, determining the frequency of the alternating voltage source from the determined time instants, the method being applicable when the voltage of the intermediate circuit is equal to or higher than the voltage of the alternating voltage source.

Abstract translation: 一种确定连接到转换器并以不受控制的方式旋转的三相交流电源的旋转状态的方法，其中转换器连接到中间电压电路并且包括相位特定的上下可控开关，其中 串联连接在与每个可控开关并联连接的中间电压电路，续流二极管以及与下部可控开关并联连接的电阻电路之间。 该方法包括以下步骤：选择电压限制，将电阻电路中的交流电压源的电压与电压极限进行比较，确定电阻电路的任何电压与电压极限相交的第一时刻，确定第二时刻 当电阻电路的任何电压随后跨越电压极限时，确定来自在第一和第二时刻跨越电压极限的相位的转换器输出相位的相序，确定交流电压源的频率 从确定的时刻起，当中间电路的电压等于或高于交流电压源的电压时，该方法是适用的。

公开(公告)号：US20120092914A1

公开(公告)日：2012-04-19

申请号：US13275844

申请日：2011-10-18

Applicant: Tero Viitanen

Inventor： Tero Viitanen

IPC: H02M7/06

CPC classification number: H02M7/217 ,  H02M1/4216 ,  Y02B70/126

Abstract: A switching branch for a three-level rectifier and a method for controlling a switching branch for a three-level rectifier are provided. The switching branch includes a first diode and a second diode connected in series, a third diode and a fourth diode connected in series, a first controllable switch connected between a neutral DC output pole and a connection point between the first and the second diode, and a second controllable switch connected between the neutral DC output pole and a connection point between the third and the fourth diode. The switching branch includes means for controlling the first controllable switch to be in a conductive state during a reverse blocking state of the first diode and the second diode, and means for controlling the second controllable switch to be in a conductive state during a reverse blocking state of the third diode and the fourth diode.

Abstract translation: 提供了一种用于三电平整流器的开关支路和用于控制用于三电平整流器的开关支路的方法。 开关支路包括串联连接的第一二极管和第二二极管，串联连接的第三二极管和第四二极管，连接在中性DC输出极与第一和第二二极管之间的连接点之间的第一可控开关，以及 连接在中性直流输出极与第三和第四二极管之间的连接点的第二可控开关。 开关支路包括用于在第一二极管和第二二极管的反向阻断状态期间控制第一可控开关处于导通状态的装置，以及用于在反向阻断状态期间将第二可控开关控制在导通状态的装置 的第三个二极管和第四个二极管。