Power Quality Improvement in Transmission System Using Optimal Location System with Integration of Distributed Power Flow Controller

The paper presents a study on a 14-bus interconnected distribution system featuring two generators, three capacitors, and eleven loads. Voltage estimations are conducted per unit (p.u.) at each bus, identifying the weakest bus based on the lowest voltage. To address the issue, a Flexible AC Transmission System (FACTS) device is introduced at the weak bus to enhance voltage and maintain it within the range of 0.95 pu to 1.05 pu. Voltage sag, a significant power quality problem, is considered. Custom power devices, specifically a Distributed Power Flow Controller, are proposed for mitigating power quality issues. The DPFC is placed at the weak bus to inject reactive power and regulate voltage. Unlike traditional sources, the loads draw reactive power from the DPFC, reducing power losses and improving voltage magnitude. The modelling and simulation of the proposed system, including the DPFC and STATCOM, are carried out using MATLAB Simulink. The comparison of bus voltages with and without the DPFC is conducted to demonstrate its effectiveness in identifying and addressing voltage-related problems within the distribution system. The modelling and simulation are conducted using MATLAB Simulink, comparing bus voltages with and without the DPFC to demonstrate its effectiveness in voltage regulation.