Automated Tertiary Voltage Control in Transmission System

The influence of wind farms, inclusion of distributed energy and the energy market has a large impact on the voltage profile in a transmission system. These issues are commonly solved with human intervention engaging reactive power resources based on operator experience. The lack of automatic coordination of reactive power resources motivated this work for implementing an advanced VVC (Volt-Var Control) for real time control of reactive power in partially automatic and fully automatic (closed loop) mode using the optimal power flow (OPF) algorithm. The main objective of the $OPF$ is to minimize grid losses of the electricity transmission network while preventing voltage limit violations to reduce economic losses, improve voltage quality, increase reliability and security of power supply, and enable better integration of renewable energy sources (RES).