A Detailed Description Of Problem Detection In Transformers Using Sweep Transient Response Evaluation

Abstract

Transformers powered electric pumps, fans, and conveyors. Power and speed affect motorvoltage. Transformers create voltage for loads. Unfortunately, daily operation reducestransformer performance. The transformer technical evaluation must be repeated by
watching performance. This research periodically inspects a high-power transformer inrepair and outage at an Indonesian utility facility. Checking maintains user deviceperformance. SFRA measurements in the 5th unit were checked every six years. Measured
in 2007 & 2013. SFRA tests transformer windings and cores by injecting low voltage at aspecified frequency. If SFRA finds a winding defect, replace or repair the transformer. Thetransformer winding & core are in excellent condition after SFRA assessment since
shrinkage is less than 20% of the its standard percentage. Thus, PT. YTL East Java's 500 kVpower transformer requires less maintenance. Power system lost assets and dependabilitydue to transformer failure. This article describes Sweep Parametric Analysis (SFRA) and itsuse in transformer testing and maintenance. SFRA tests transformer mechanical integrityelectrically. SFRA frequency response changes may indicate physical changes within thetransformer, which must be discovered and probed.