Fault location in power distribution systems is an important aspect of power quality, in particular , in relation to power supply continuity. Currently, there are two clearly defined methods commonly used to locate faults, those which are based on the power system model and those which are based on knowledge. Fault location methods based on knowledge use information obtained from signals of voltage and current measured during fault situations, and normally require a considerable amount of fault registers to have a successful performance. This paper presents the modeling of a power distribution system and its protective relaying, settled in a fuse saving scheme. Using the described power system, it is possible to obtain a fault database by means of an event automatic generation using the Alternative Transient Program (ATP) and Matlab. The fault database can be used to perform different types of system analysis and in this speci fic case to solve the problem of fault location in power distribution systems using knowledge based methods. As a result, a data base which contains 930 different fault simulations on a 25 node test system was obtained.
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