Determination of optimum values for voltage setpoints of power stations in Turkey

Elma, İsmail
Voltage control is performed in three hierarchical levels in Turkish power system: primary, secondary and tertiary voltage control. Primary and secondary voltage controls are defined as the regulation of the voltage at the generator terminal and at the high voltage busbar of the power plant according to the pre-determined setpoints. The determination of the voltage setpoints for the power plants, which is defined as the tertiary voltage control, is performed by the operators in National and Regional Load Dispatch Centers. This process is based on the operators’ experience and knowledge about the system operating conditions and network connections. Since no systematical or analytical approach is employed during this process, optimum voltage profile along the grid may not be reached or transmission losses may increase. In this thesis study, a systematical approach is developed to guide the system operators during the determination of voltage setpoints for the power plants. For this purpose, an algorithm with two stages is developed. Stage I of the algorithm optimizes the voltage profile along the grid by minimizing the transmission losses. On the other hand, Stage II of the algorithm minimizes the cost of corrective actions if and when they are required. The algorithm has been developed and simulated using DigSilent and Matlab softwares. As the test system, West Anatolia Region of Turkish network has been chosen. Simulation results reveal that the optimum voltage profile can be obtained and the transmission losses can be minimized by the help of these studies.
Citation Formats
İ. Elma, “Determination of optimum values for voltage setpoints of power stations in Turkey,” M.S. - Master of Science, Middle East Technical University, 2014.