Improvement of Power Quality in Primary Distribution Systems Based on Static-Var Compensators

A flexible AC Transmission Systems (FACTS) is a new technology offers fast and reliable control over the transmission distribution parameters like voltage phase angle between sending end receiving voltage. Distribution static synchronous compensator (DSTATCOM) second generation member of controllers. Reactive power compensation an important aspect in systems. current addition to increasing system losses, introduces drop at lead point finally it causes poor quality Primary radial feeders have high resistance reactance ratio, which loss providing demanding entire load while maintaining magnitude acceptable range one major constraints, using capacitor banks improve reactive not quite enough feeder, because more slow step by response capable generate continuously variable power. In some primary state Khartoum, observed that there are appropriate drops service loads although individual been connected these feeders, from here we researched for overcome this problem. steady-state model proposed developed compensate Voltage Source Converter (VSC) with Pulse Width Modulation (PWM) cascade four direct proportional integral controllers (PI) reference frame. The detailed modeling design specific typical (industrial, commercial, residential) presented implemented along necessary mathematical equations Matlab software. Simulation schemes done help block diagrams stability analysis. Load flow method analysis, operation planning studies any condition. research backward forward sweeps (Kirchhoff’s Laws) has rather than Newton-Raphson Fast decoupled methods R/X ratio make systems ill-conditioned iterations was installed on lines subject considerable interest beside good solution. Keywords: Power System, Flexible Devices, STATCOM, PI Controller DOI: 10.7176/ISDE/13-1-05 Publication date: May 31 st 2023