Stability Improvement of Power System by Using Fuzzy Coordinated Static Var Compensator

Selection the optimum place of FACTS devices using fuzzy control system

“…From the above data results in the Figures (8)(9)(10)(11) and Tables (6)(7)(8)(9); during applied of FACTS controllers SVC/STACOM, the deviation in active power ∆P and reactive power ∆Q at the load buses by the fault, is reducing and it becomes near to zero especially when the SVC/STACOM devices applying in bus 9, that also prove that it is the optimum location of the FACTS devices, therefore the system returns to stability conditions. Also noted from results that the deviation reaches to its minimum and becomes very low incase of using STATCOM as compared to using SVC.…”

“…Applying SVC and STATCOM at each load bus, one at a time, (3, 4, 5, 6, 8, 9, 10, 19 and 20) during fault condition to enhance the stability. For example, the result is taken when fault at bus 8 and applying SVC/STACOM at load buses respectively, then the deviation in active power ∆P and reactive power ∆Q at the load buses respectively due to the fault at bus 8, shown in Figures (8)(9)(10)(11) and Tables (6)(7)(8)(9).…”

“…However, modern studies show that the possibilities of employing FACTS controllers to develop power system stability in supplement to their core function of power flow control. Also, FACTS devices could be used to improve voltage profile, power transmission capacity, and enhancing power system stability which is a suitable control strategy to enhance different system performances such oscillations, losses of the system, stability, reliability, security, and power factor in distribution systems [1,[8][9][10]. Although the FACTS controllers are expensive, they provide a and fast and smooth response to provide stability for the power system during the transient and steady-state and allow utilities to run their transmission schemes even nearer to their physical limits, compared with conventional methods [11][12][13].…”