The Design And Implementation Of IEEE1588Time Synchronization Protocol On Fault Location

Now people pay attention to the safety of train, the stability and reliability of powersupply system will influence the safety of train running, so to accurately position thebreakdown of the performance is especially important. Not only can reduce the amount ofhuman, material and financial resources, also can shorten the time and improve the reliabilityof power supply, in order to ensure running safety.The modern type D double-ended transmission line fault location principles based on theabsolute time difference of the initial waves from the internal fault of the line arrive at theboth ends of the points. Calculation the distance between the fault point and the points onboth ends. In order to record the absolute time of the initial waves from the internal fault ofthe line arrive at the both ends of the points, it is need to installed wave collection system onboth sides.IEEE1588that released in2002defines a precision time protel which is used indistributed measurement and control system. In fact, it can easily reach the the synchronousprecision of microsecond, but does not need a lot of resources. IEEE1588is based on thenetwork, but it does not need to establish a special network for clock transmission. What youshould do is to add synchronous time message to the existing network if you want to realizeIEEE1588protel. Those message just share the network with control packets or other packets,so they only take up a few of the network resources.This paper is mainly reserched on realizing the synchronization of clock that is based onthe precision clock synchronization protocol standard of IEEE1588research networkmeasurement and control system, including system composition of RTP, clocksynchronization mechanism of RTP protel, communication topology structure of RTP, optimalclock algorithm of RTP, clock state management regulations of PTP system and the clocksynchronization process of equipments in RTP system. This paper analyzes the factors thatinfluence the clock synchronization accuracy: network component factor, the operatingsystem and protocol stack factor, clock instablity factor, and then puts forward thecorresponding compensation method, with the result that realizing clock synchronization ofIEEE1588protel with software.