Design of a GPS based time stamping and scheduling system for power system applications

[摘要] ENGLISH ABSTRACT:This thesis describes the development of a GPS Based Time Stamping and SchedulingSystem for power system applications. These applications include Wide Area Measurements(WAMs) of electrical power system quantities and high-voltage transmission line faultlocation.The developed system employs a microcontrolIer and a GPS receiver to synchronise an onboardmicrosecond-accurate clock to a global time standard. The system is therefore able toprovide an accurate GPS-synchronised time stamp of a received trigger signal for use in highvoltagetransmission line fault location. The system is also able to generate a trigger signal ata pre-programmed time for initiation of data acquisition runs on electrical power systems.The system was constructed and tested in a laboratory environment. Although the system isdesigned to operate in stand-alone mode, a host computer software program was alsodeveloped for system control and data downloading. The software program was used to timestamp a number of trigger signals and data was downloaded to a host computer. Triggersignals were also generated at predefined times. The acquired data was validated andpresented.In conclusion, the low system cost, relative to existing commercial systems, accuracy andprogrammability of the developed system makes it suitable for a wide variety of time-criticaldata acquisition applications.

[发布机构] Stellenbosch University