An Improved City Power Synchronization Method Used in Substation MOA On-line Monitoring System

Based on introducing the principle of the resistive fundamental harmonic leakage current method which is widely used in substation MOA on-line monitoring system, this paper introduced traditional city power synchronization method and proposed an improved city power synchronization method which combined field bus synchronization and city power synchronization. This method with short sampling period was easy to achieve. Based on it, a substation MOA on-line monitoring system was developed. Test results showed that the improved city power synchronization method can indeed improve the resistive current sampling precision and consistency of sampling and had great engineering application and promotion value.