Discussion on Data Synchronization of Electronic Instrument Transformers
Wei Li · 2007
After introducing the structure of the electronic instrument transformers as well as the general configuration IEC60044-8 required,several problems on data synchronization of electronic instrument transformers are analyzed respectively from bay,associated bays,associated substations,and wide area system.Then,two data synchronization methods from IEC60044-8,respectively adopting the technologies of 1 PPS synchronization pulse and interpolation algorithm,are compared.Simulation and error analysis to linear interpolation method show that the method has appropriate precision for most fundamental measuring based secondary devices,but it is not suitable for the devices that require harmonic components measuring included.Finally,a 48 or 80 points sampling per period is suggested for the method.