Abstract:

In order to reduce the influence caused by interference on site and the difficulty to install the system, an on-line monitoring method based on WSN(Wireless Sensor Networks) and correlation algorithm is designed to measure dielectric loss in high-voltage electricity equipments. It provided detail introductions to the system measuring principle and synchronization sampling. Theoretical demonstration to phase calculation with correlation algorithm is supplied and the design of on-ine monitoring system based on such algorithm is represented. Compared with FFT（Fast Fourier Transformation） algorithm, the efficiency of correlation algorithm is 128 times higher. On-site simulation experiments show that the measurement precision of dielectric loss factor tan δ has reached 0.039%, and the system has better antiinterference than QS1 furbenicillin bridge.

Key words: high voltage measuring technique, dielectric loss, wireless sensor network（WSN）, correlation algorithm, on-line monitoring, synchronization sampling