Abstract :
For pt.VI see ibid., vol.7, no.3, p.9 (1991) Online partial-discharge (PD) tests for monitoring the condition of the solid dielectric insulation in high-voltage equipment are discussed. Sources of external electrical noise are identified, as are attributes of PD and noise that are helpful in drawing distinctions between them. Methods for distinguishing between PD and noise are described. They are based on pattern recognition, time and frequency domain characteristics, or pulse time-of-flight analysis. Several online PD measuring systems for rotating machines, substation equipment, and high-voltage cables are presented.<>
Keywords :
cable insulation; insulation testing; machine insulation; partial discharges; pattern recognition; external electrical noise; frequency domain characteristics; high-voltage cables; high-voltage equipment; operating equipment; partial discharge tests; pattern recognition; pulse time-of-flight analysis; rotating machines; solid dielectric insulation; substation equipment; time domain characteristics; Condition monitoring; Dielectric measurements; Dielectrics and electrical insulation; Frequency domain analysis; Insulation testing; Partial discharge measurement; Partial discharges; Pattern analysis; Pattern recognition; Solids;
