A Novel Synchronous Switch Method Based on Kalman Filter

Zheng Guilin, Chen Xi
2014 International Journal of Future Generation Communication and Networking  
In order to create the idea of AC switch without electric arc and inrush voltage to the power system, the study of accurately catches AC zero crossing of a mechanical relay is put forward in this paper. It is the key to make the switch act at the right predicted time which realizes switch on or off exactly at the AC zero crossing point. However, the action time of a mechanical switch is affect by many factors such as driving voltage, ambient temperature, age of the mechanic structure. Aim at
more » ... discrete measurements of latching relay action time, the Kalman filter mathematic model is introduced in this paper to eliminate the dynamic noise and measurement noise which affects the bias time drift from the zero voltage or zero current point. Simulation result by matlab and group data get from experiments of a realized multichannel switch indicate that Kalman filter algorithm can overcome the discreteness of latching relay action time measurements. Also confirmed by statistical experiments that synchronous switch action precisely and reliably at AC zero point which can ensure the ability of suppress electric arc and high frequency inrush current. 34 Copyright ⓒ 2015 SERSC feature in power switch application in situation of overvoltage, over current. And it needs not any heat sink. He obtained his PhD in electrical engineering from the Wuhan University in 1989. His research work has centered on control theory and engineering, measurement and sensors, mechanical-electrical system integration, intelligent power grids, and related fields. Chen Xi, is now working towards the Ph.D. degree in the
doi:10.14257/ijfgcn.2015.8.2.04 fatcat:5nz4c4kcsnaxfnuh4t5lj63qkq