Abstract :
The IEEE Transformer On-Line Monitoring Task Force is developing a guide for the on-line monitoring of power transformers, its components, and accessories. Publication of the guide is expected in mid 2000. This paper gives an overview of the key parameters that can be monitored on-line (dissolved gas-in-oil analysis, moisture-in-oil, partial discharge, oil temperature, winding temperature, load current and voltage, insulation power factor and pump/fan operation). The techniques to monitor instrument transformers are then discussed (tan δ and relative capacitance measurements, gas analysis, PD measurement, and pressure measurement). The paper also discusses measurements of bushings and load tap changers
Keywords :
bushings; capacitance measurement; chemical analysis; chemical variables measurement; computerised monitoring; dielectric loss measurement; electric current measurement; instrument transformers; insulation testing; partial discharge measurement; power transformer insulation; power transformer testing; temperature measurement; transformer insulation; voltage measurement; IEEE Transformer On-Line Monitoring Task Force; PD measurement; bushings; dissolved gas-in-oil analysis; gas analysis; instrument transformers monitoring; insulation power factor measurement; load current measurement; load tap changers; load voltage measurement; moisture-in-oil analysis; oil temperature measurement; on-line monitoring; partial discharge measurement; power transformers monitoring; pressure measurement; pump/fan operation; relative capacitance measurement; tan δ measurement; transformers accessories; winding temperature measurement; Capacitance measurement; Instrument transformers; Monitoring; Oil insulation; Partial discharge measurement; Partial discharges; Power transformer insulation; Power transformers; Pressure measurement; Temperature;
