公开(公告)号：KR1020110068283A

公开(公告)日：2011-06-22

申请号：KR1020090125163

申请日：2009-12-16

Applicant: 한국전기연구원

Inventor： 박정우 ,  강대욱 ,  오창훈 ,  문지우 ,  배득우 ,  권진수

IPC: H02P9/44

CPC classification number: H02P9/44 ,  H02K19/16 ,  H02P21/0003 ,  H02P2103/20

Abstract: PURPOSE: A synchronizing method for a generation system including a winding type induction generator is provided to prevent an individual synchronization angle reset process by automatically synchronizing a stator voltage vector with a system voltage vector regardless of the size of a system voltage. CONSTITUTION: A Harr wavelet function with 2 level and a voltage signal with a noise are successively convoluted. The voltage signal is divided into three frequency components. A signal is rectified by applying a threshold and is restored. A new voltage signal without the noise is varied at a small slope range.

Abstract translation: 目的：提供一种用于包括绕组型感应发电机的发电系统的同步方法，以通过使定子电压矢量与系统电压矢量自动同步而不考虑系统电压的大小来防止单独的同步角度复位过程。 构成：具有2级的Harr小波函数和具有噪声的电压信号被连续地卷积。 电压信号被分为三个频率分量。 通过应用阈值来纠正信号并被恢复。 没有噪声的新电压信号在较小的斜率范围内变化。

公开(公告)号：KR1020110060262A

公开(公告)日：2011-06-08

申请号：KR1020090116796

申请日：2009-11-30

Applicant: 한국전기연구원

Inventor： 강대욱 ,  박정우 ,  오창훈 ,  문지우 ,  배득우 ,  권진수

IPC: H02M7/48 ,  H02J3/01

Abstract: PURPOSE: A power converting apparatus of a synchronous generator is provided to ensure a harmonic current property by constituting a 2-level converter and a 3-level NPC converter concurrently. CONSTITUTION: A generator side converter(10) is made of a 2-level converter. One converter(20a) among system side converters is made of a multi-level NPC converter. Th multi-level NPC converter is a 3-level NPC converter whose output is controlled according to a voltage command value of a controller. A rest system side converter(20) is composed of a 2-level converter. A controller controls compensation of the harmonic current induced from each system side converter into the system side.

Abstract translation: 目的：提供同步发电机的电力转换装置，通过同时构成2级转换器和3级NPC转换器来确保谐波电流特性。 构成：发电机侧转换器（10）由2电平转换器构成。 系统侧转换器中的一个转换器（20a）由多级NPC转换器构成。 多级NPC转换器是一个3级NPC转换器，其输出根据控制器的电压指令值进行控制。 休息系统侧转换器（20）由2级转换器构成。 控制器控制从每个系统侧转换器引入系统侧的谐波电流的补偿。