Control of distributed power flow controller for power quality improvement

Abstract

In modern power systems, there is a great demand to control the power flow actively. Power flow controlling devices are required for such purpose because the power flow over the lines is the natural result of the impedance of each line. Due to the control capabilities of different types of Power flow controlling devices, the trend is that mechanical devices are gradually being replaced by Power Electronics devices. There is a high demand for power flow control in power systems of the future, and combined FACTS devices are the most suitable devices. To develop a new power flow controlling device that has combined performances of FACTS devices, acceptable cost of electric utilities and reliability for power systems. In a power system, there is a great desire for a fast and reliable control of the power flow controller because of the rising requirement of energy, the ageing of network flow and distributed generations. According to the growth of electricity demand and the increased number of non-linear loads in power grids, providing a high-quality electrical power should be considered. Voltage sag and swell of the power quality issues are studied, and Distributed Power Flow Controller (DPFC) is used to mitigate the voltage deviation and improve power quality. The case study contains a DPFC sited in a single-machine infinite bus power system including two parallel transmission lines, which simulated in MATLAB/Simulink environment. The presented simulation results validate the DPFC ability to improve the power quality. newline