发明名称 |
Method and system for detecting stand-alone operation of a distributed generating system |
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.
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申请公布号 |
US7342758(B2) |
申请公布日期 |
2008.03.11 |
申请号 |
US20030745619 |
申请日期 |
2003.12.29 |
申请人 |
INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE |
发明人 |
LIU YUNG-HSIANG;LUOR TAIN-SYH;HUANG SHYH-JIER;LIN JEU-MIN |
分类号 |
H02H3/46;H02H7/22;H02J1/00;H02J3/38 |
主分类号 |
H02H3/46 |
代理机构 |
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地址 |
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