Abstract: Voltage stability is one of the important issues in power system. Voltage sage, voltage swell and generation of harmonics that may cause system instability. To compensate all these problems in transmission system svc is used. Static VAR Compensator (SVC) has been used as a supplementary controller to improve transient stability and power oscillation damping of the system. The aim of svc with fuzzy logic controller is to make it more compatible with prevailing load demand so as to maintain the system stability under heavy load condition or light loading conditions. A static VAR compensator is chosen as a low cost solution to replace a conventional capacitor bank, thus allowing a continuous and flexible nodal voltage adjustment. Fuzzy logic is new control approach with great potential with real time applications. Due to simplest structure, easy designing and low cost, PI controller is used in SVC as voltage regulator in most industries. But its drawback is that due to highly nonlinearity, or uncertainty it is not able to control. Hence we need to design svc with fuzzy controller.
Keywords: FACTS, fuzzy logic, reactive power, SVC, voltage stability
Title: Voltage Stability Improvement by using SVC with Fuzzy Logic Controller in Multi-Machine Power System
Author: Roopesh Kumar, Ashish Choubey
International Journal of Electrical and Electronics Research
ISSN 2348-6988 (online)
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