When exposed to high temperature, insulating paper found in transformers breaks down and results in a reduction of the useful life of the transformer. Monitoring temperature of the insulating paper via a winding hot spot ensures the insulating paper is not exposed to high temperatures and helps minimize damage.
Conventional methods of monitoring the winding hot spot use calculations to simulate the temperature, but do not measure it. These winding temperature indicators (WTIs) infer the hot spot temperature by measuring the transformer load on a single phase and the surrounding oil temperature and then apply a model. Other issues with the WTIs include a long lag time (up to 5 hours) and actual temperature variance (up to 20 °C).
LumaSense delivers many innovative temperature and gas sensing instruments for monitoring transmission and distribution assets. From gas monitoring with Non-Dispersive Infrared (NDIR) and Photoacoustic Spectroscopy (PAS) technologies or temperature monitoring with infrared and fiber optics, our broad range of technology expertise allows us to offer industry professionals opportunities to implement cost-effective online monitoring solutions to manage and maintain equipment.
Transformer Winding Hot Spot Monitoring – More than 40 years ago, LumaSense pioneered the field of fiber optic winding hot spot measurements with Fluoroptic® technology. Monitoring with fiber optics enables operators to accurately measure the actual hot spot temperature in real-time.
Transformer and LTC DGA Monitoring – With NDIR-based instruments, operators can perform automated, remote dissolved gas analysis to detect key fault gases and perform analysis on the condition of the transformer or load tap changer.
Substation Asset Monitoring – Infrared tools such as thermal imagers and pyrometers enable utilities to remotely monitor specific connections and assets such as transformers, bushings, and capacitor banks in real-time.
SF6 Leak Detection – Using PAS for SF6 leak detection creates a highly accurate, sensitive, and reliable solution to limit the emissions of insulating gas found in switchgears.
Learn more about these solutions on our website or visit us at the upcoming Middle East Electricity show March 6-8 in Dubai. Talk with our experts and learn more about these technologies at Stand Z3.E17.