A Summary of NEETRAC On-Line Frequency Response Analysis (FRA) and a new EPRI Commercial Prototype FRA Installation at First Energy
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The electric utility industry is in the age of transition from periodic maintenance to predictive or conditioned based maintenance on essential substation power transformers in an effort to lower maintenance costs and maximize the use of existing equipment. The development of new on-line diagnostics is in the critical path to achieve the predictive maintenance goals for power transformers. EPRI has partnered with NEETRAC since the beginning of the on-line FRA development in 2003. The initial data from the first on-line FRA installation was recorded in 2004 and presented at the February, 2004, EPRI Conference in New Orleans, LA. This paper includes key points of the current NEETRAC on-line FRA and the most recent developments towards a viable commercial prototype for the EPRI First Energy project. In particular, equipment upgrades and relocation as well as downsizing along with wireless data communication from the transformer are discussed for the new installation. The commercial prototype on-line FRA is to be installed on a 345 / 140 kV, 448 MVA, auto-transformer at First Energy’s Star Substation in the second quarter of 2009.
- NEETRAC Publications