Dynamic Resistance Measurement for OLTC Condition Assessment
|Dynamic resistance measurement is a DC test (transformer winding resistance) used to verify OLTC by recording
the current at high sampling rate while changing the tap position, and
presenting it graphically in time.
The group members presently use four instruments: SEITZ , DV-Power, and Megger Programma T1800 for graphing purpose, and Omicron for numeric analysis - and are aware of other products on the market. We invite users of other instruments to join our working group and contribute to the knowledge base.
There are other test methods to provide condition assessment of OLTCs - such as motor torque, infrared, vibration testing, DGA analysis in oil, etc. We will be looking into any correlation between these at a later stage. There is more information in the literature section.
The Working Group wants to exchange knowledge and experience, and learn from each other,
collect information and improve diagnostic power of this method.
At the first meeting held in Dublin October 2010, participants agreed to collect and analyze information and case studies, and organize workshops to try various methods and procedures to establish better understanding of the test method.
activities of the working group are defined, and various process
variables and issues are outlined... here>>>>
Some of the first papers on this topics were published in 1995-2000. Since
then, there was a lot of work and research done. We will be collecting all the
literature published and offered on this topic.
Data and explanations collected on good and bad OLTC will be presented in
"case studies" model, and these will constitute our knowledge base.
The fifth meeting and workshop in Belgrade, Serbia October 28-29, 2013 report>>>
The fourth working group meeting, Paris January 30, 2013 at EDF R&D Clamart report>>>
The third working group meeting in Stockholm February 15, 2012 report>>>
Our first meeting was held in Dublin
during the FORUM 2010, the second meeting with workshop in Madrid on
May 16, 2011.
|NOTE: This is a WG protected web site, a proper credentials are required to access the information and literature.|