SIMULATION OF DYNAMIC VOLTAGE RESTORER FOR POWER FLOW

Abstract

To achieve operational reliability and financial profitability more efficient utilization and control of the existing transmission system infrastructure is required. Mechanical switch based traditional approaches cannot realize full utilization of transmission system due to the needed large stability margin. Flexible Alternating Current Transmission System (FACTS) is a power electronics based real time computer controlled technology provides needed corrections of transmission functionality in order to efficiently utilize existing transmission systems and therefore minimizing the gap between the stability and the thermal levels. Dynamic Voltage Restorer (DVR) is a Voltage Source Converter (VSC) based FACTS controller for series compensation with the unique capability of power flow management among multi-lines of a Substation. Basic principles of the DVR simulated using PSPICE and discussed. Simulation results demonstrate the capability of DVR to realize power balance in a transmission system with two identical lines and two non-identical lines.