Title :
Online Monitoring of Network Impedances Using Digital Network Analyzer Techniques
Author :
Barkley, A. ; Santi, E.
Author_Institution :
Dept. of Electr. Eng., Univ. of South Carolina, Columbia, SC
Abstract :
This paper presents an extension to the cross-correlation method for switching power converter identification which allows monitoring of Thevenin source and load impedances. This information can be used for fault localization, converter health monitoring, and load estimation. Additional insight into performance degradation due to subsystem interaction can also be obtained. To verify the proposed approach, impedances of three commonly encountered loads and an undamped input filter are measured and compared to results from a conventional network analyzer. Some practical techniques for improved high-frequency measurements are given, and a method to measure the minor loop gain at an interface is proposed.
Keywords :
condition monitoring; fault diagnosis; network analysers; switching convertors; Thevenin source monitoring; converter health monitoring; cross-correlation method; digital network analyzer techniques; fault localization; load estimation; load impedances; minor loop gain; network impedances; online monitoring; switching power converter identification; undamped input filter; Degradation; Filters; Gain measurement; Impedance measurement; Monitoring; Power system stability; Switching converters; Testing; Transfer functions; White noise;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2009. APEC 2009. Twenty-Fourth Annual IEEE
Conference_Location :
Washington, DC
Print_ISBN :
978-1-4244-2811-3
Electronic_ISBN :
1048-2334
DOI :
10.1109/APEC.2009.4802695
