The Application of Satellite Simulator in Time Synchronization System Detection in Power System

Abstract

There are many difficulties to establish a real satellite receiver in a laboratory environment. The satellite simulator can replace the satellite receiver to simulate the satellite signals. In this paper, it analyses the advantages of the satellite simulator in the time synchronization detection and consider different time synchronization output signals(1PPS,B code,PTP) as the standard, the difference of the time accuracy is about 10-15 ns according to comparing the satellite receiver with the satellite simulator in the power system time synchronization detection.If taking the margin of error caused by the satellite simulator into account,the satellite simulator can replace the satellite receiver to complete the detection in the power system time synchronization detection. Introduction With the rapid development of the power grid, its size and digital level have greatly improved, the performance of network equipments also ask for more stringent requirements, and the lab generate a lot of testing business. Synchronous electrical equipments in the laboratory should follow a high-precision time or frequency reference, this reference is usually provided by a satellite signal. However, using real satellite receiver in a lab environment is very difficult. For example, the changes of experimental location,the non-reproducibility of real satellite signals, etc. Thereby the synchronization system detection were impeded. Satellite simulator can simulate the output of different environments and different geographic locations, it can replace the real satellite signal in principle. The article use theoretical analysis method, respectively, take different time synchronization output signal (1PPS, B code, and PTP) as the reference to explore whether the satellite simulator can replace the satellite receiver to complete the detection of time synchronization system in the power system.