Power Factor Improvement of Electrical Load Using Voltage Source Converter (VSC) Based D-STATCOM (A Case Study: Adama Spinning Factory)

Abstract

One of Ethiopia's most significant sectors is textiles. These sectors experience power factor issues. Like other textile companies, the Adama Spinning textile mill has a low-power problem that needs to be fixed. Power factor correction was investigated for this reason by utilizing a fact-controller three-leg voltage source converter (VSC) D-STATCOM. Accordingly, numerous study-related data have been gathered through surveys, interviews, and measurements. As a result of the increased current caused by the poor power factor, all power system components experience additional active power losses. The power factor should be as close to unity as possible to guarantee the most favorable conditions for the supply system. By directly measuring the power factor of the load with a power stability recorder, using recorded data, and examining examples of the Adama Spinning Factory's power factor-charged electricity bills from Ethiopia, it is possible to determine the factory's low power factor. According to the findings, the factory's distribution system had a significant level of power loss and a power factor of 0.75 lagging. Therefore, I fall below the electricity provider's specified minimum acceptable value (0.85). This thesis uses a fact controller three-leg voltage source converter (VSC) D-STATCOM (distribution Static Synchronous Compensator) that is connected at the three-phase power entrance of the factory in parallel to the load to solve the low power factor of the factory. Reactive power compensation for power factor correction, voltage control, elimination of unbalanced load current, and elimination of harmonic currents at the point of common coupling are accomplished using a VSC-based D-STATCOM. According to the study, when the power factor is changed from the current (0.75) to the desired value (0.98), the factory load can be reduced by 25%.This lowers electrical energy waste and lowers the factory's electricity costs. The goal of this thesis for this system is to increase the factory's power factor from its current operational level of 0.75 lagging to 0.98 lagging. The Synchronous Rotating Reference Frame (SRF) theory, which is modeled and emulated by MATLAB Simulink software, was used by the system to mimic a D-STATCOM. This design, which was entirely carried out in MATLAB simulation software, allowed the factory's power factor to be maintained at 0.98 at all times while keeping the load bus voltage at one per unit. The active and reactive power components behave independently when the system changes.