Analysis of electromagnetic disturbances with or without SVC device

Considering that the electrical power system is designed to operate in sinusoidal mode, the waveforms of voltage and current shows distortion compared to sinusoidal wave. For allowing limitation of all kinds of disturbance an effective technical solution is based on power electronics. The smart grid paradigm is encompassing an increasingly adoption of distributed generation all over the world. The flexible alternative current transmission systems (FACTS) devices, can be used to increase transmission capacity, improving stability and dynamic behavior, and ensure a better power quality at distribution level by controlling several key-parameters. The purpose of this paper is to deal with issue of power quality alteration, by assessing the power electronics equipment behavior on a real-network example, in order to create a general image of issues and solutions. The first section identifies the current state-of-the art of FACTS technologies and their influence on power quality. An example was designed in ETAP software, starting from a real electric distribution system using PV generation in order to create a general image of issues and solutions. After the SVC device connection to the system, an analysis over voltage variation was performed and interesting conclusions have been drawn.