Research on the Digital Dielectric Loss Measuring Technology Based on IEEE1588

The dielectric loss is a small value, is also an important indicator to measure the performance of the electrical equipment insulation[1, 11]. But outside interference can easily cause a big impact to the dielectric loss measurement, and real-time response is required on the dielectric loss online monitoring system. Therefore, high accuracy, rapid digitization of the dielectric loss measurement method is a key part of the dielectric loss online monitoring system. This article describes a practical harmonic analysis method to measure the dielectric loss. Combined with the IEC61850 and IEEE1588, according to the special circumstances of the measurement site, the digital method of measuring dielectric loss is realized through the joint work of a voltage acquisition unit and another entirely different current acquisition unit. Finally the source of calculating errors is verified and the error is measured less than 0.00025 (radian) in test, which is less than 1μs when measured in sampling-time.