Implementation Of Fault Location Software Of Gps-Based 2-Terminal Synchronous Sampling

The precise location of high-voltage transmission line fault is of great significance and practical engineering value.For years,general importance has been attached to the study of faults location by the network operation and management departsments and specialists.But owing to the short developmengt history of faults location techniques and the limits of related techniques,fault location devices with high precision are not widely used in practice.With the development of computer communication technology and the wide application of microcomputer-based protection devices with electric power system,it is possible to locate high-voltage transmission line faults precisely.This thesis ,through the study and analysis of the present fault location methods,comments on their respective advantages and disadvantages and makes a predication of the development trend of fault location technology.Then ,this thesis presents an algorithn of 2-terminal quantity fault location based on synchronous GPS sampling.This algorithm conducts fault location with only the 3-phase fundemental wave voltage and current phasors of the 2 terminals of transmission lines and apples to lines of both symmetrical and asymmetrical parameters,irrelerant to the impedence,fault types and transitional resistance of the 2 terminals of lines.Based on the above,this thesis develops a relevant software of fault location.Meanwhile,to verify the validity of the algorithm and test the factors influential to its precision,this thesis performs a great number of simulation computations.And the simulation results indicate both the validity and the high precision of this algorithm.Finally,this thesis presents the initial design scheme of fault location system hardware to implement algorithm.