1 results about "Frequency factor" patented technology

The application discloses a kind of on-line evaluation methods of remaining service life of insulation bus duct, belong to the technical field of electric power equipment.The method comprises: obtaining the reference thermal life parameters of insulating material, including activation energy and frequency factor;Real-time temperature data in operation is obtained according to sampling period;Characteristic life value under current temperature is calculated based on the temperature data using Arrhenius equation, and the ratio of sampling period length and characteristic life value is taken as the thermal aging loss increment of the period;Loss increment is accumulated to historical cumulative thermal aging loss total value;Whether the cumulative value reaches the life termination threshold is judged, and the remaining service life evaluation result is calculated and output when not reached.The application combines thermal aging model with on-line temperature monitoring, to realize dynamic evaluation under variable temperature condition in the form of discrete time sampling and loss accumulation, solves the problem that offline evaluation cannot reflect actual operation condition cumulative aging, algorithm is simple, deployment cost is low, and is suitable for bus duct on-line monitoring.