Revision of the communication protocols used by the client and based on norm X.25, in order to Development of the reference network model used at a national level, in order to run power flows and perform reliability analysis and network planning for the Spanish power grid. This project involves designing and building both the database model and the algorithms needed for the system’s internal logic. The goal for this development lays on the system’s high performance nature, which in turn explains the need to guarantee it runs throughout the whole network simultaneously. In order to achieve this multithreading capability, parallelization techniques, low level programming and have been used.