公开(公告)号：US07342758B2

公开(公告)日：2008-03-11

申请号：US10745619

申请日：2003-12-29

申请人： Yung-Hsiang Liu ,  Tain-Syh Luor ,  Shyh-Jier Huang ,  Jeu-Min Lin

发明人： Yung-Hsiang Liu ,  Tain-Syh Luor ,  Shyh-Jier Huang ,  Jeu-Min Lin

IPC分类号： H02H3/27 ,  H02H3/46 ,  H02H7/22

CPC分类号： H02J3/38 ,  H02J2003/388 ,  Y10T307/642

摘要： A method and a system for detecting stand-alone operation of a distributed generating system having a generating source connected in shunt with an independent power distribution system via a first branch breaker are proposed. A voltage or a frequency signal on the independent power distribution system is read. The wavelet transformation is performed on the voltage or frequency signal to form a time versus high-frequency component window and a time versus low-frequency component window for conveniently detecting the perturbation in the time domain of the signal. Next, whether the absolute value of the high-frequency component is greater than a threshold value and whether the duration is longer than another threshold value are determined. If both answers are yes, a stand-alone operation occurs. An alarm signal is immediately generated and sent to the first branch breaker to release the connection between the generating source and the power distribution system.

摘要翻译： 提出了一种用于检测具有通过第一分支断路器与独立配电系统分流连接的发电源的分布式发电系统的独立运行的方法和系统。 读取独立配电系统上的电压或频率信号。 对电压或频率信号进行小波变换，形成时间对高频分量窗口和时间相对低频分量窗口，方便检测信号时域的扰动。 接下来，确定高频分量的绝对值是否大于阈值，并且确定持续时间是否长于另一阈值。 如果两个答案都为是，则会发生独立操作。 立即产生报警信号并将其发送到第一分支断路器以释放发电源和配电系统之间的连接。

公开(公告)号：US20050146224A1

公开(公告)日：2005-07-07

申请号：US10745619

申请日：2003-12-29

申请人： Yung-Hsiang Liu ,  Tain-Syh Luor ,  Shyh-Jier Huang ,  Jeu-Min Lin

发明人： Yung-Hsiang Liu ,  Tain-Syh Luor ,  Shyh-Jier Huang ,  Jeu-Min Lin

IPC分类号： H02J1/00 ,  H02J3/38

CPC分类号： H02J3/38 ,  H02J2003/388 ,  Y10T307/642

摘要： A method and a system for detecting stand-alone operation of a distributed generating system having a generating source connected in shunt with an independent power distribution system via a first branch breaker are proposed. A voltage or a frequency signal on the independent power distribution system is read. The wavelet transformation is performed on the voltage or frequency signal to form a time versus high-frequency component window and a time versus low-frequency component window for conveniently detecting the perturbation in the time domain of the signal. Next, whether the absolute value of the high-frequency component is greater than a threshold value and whether the duration is longer than another threshold value are determined. If both answers are yes, a stand-alone operation occurs. An alarm signal is immediately generated and sent to the first branch breaker to release the connection between the generating source and the power distribution system.

摘要翻译： 提出了一种用于检测具有通过第一分支断路器与独立配电系统分流连接的发电源的分布式发电系统的独立运行的方法和系统。 读取独立配电系统上的电压或频率信号。 对电压或频率信号进行小波变换，形成时间对高频分量窗口和时间相对低频分量窗口，方便检测信号时域的扰动。 接下来，确定高频分量的绝对值是否大于阈值，并且确定持续时间是否长于另一阈值。 如果两个答案都为是，则会发生独立操作。 立即产生报警信号并将其发送到第一分支断路器以释放发电源和配电系统之间的连接。