Intelligent Protection of a Power Supply System for Electric Consumers without Access to the Low Voltage Line

The research activity refers to the synthesis of the electronic equipment of global protection related to an efficient system for capturing the electric energy from the high voltage grid for the purpose of supplying high quality energy to electric consumers. The main objective of the paper is to present the protection from the input of the power supply system. After analyzing the main needs and types of protection encountered today in the composition of power supply systems we proceed to the synthesis of the block diagram for the implementation of the global protection. An advanced solution is to implement global protection with a intelligent numerical relay. Analysis of global protection is checked by simulation in the LabVIEW virtual environment. The modeling and simulation of the global protection function is performed for the following types: over and under voltage protection; over and under frequency protection; protection against overcurrent. Virtual tools designed, built and presented in this paper can also be successfully used in educational activity during specialized classes at colleges and universities.