Improvement of Power System Stability by Static Var Compensator and Tuning Employing Genetic Algorithm

Abstract

The use of power systems as close to their operating limits can cause instability if a disturbance is occurred. The damping of the system's oscillations can be obtained by conventional means such as voltage and speed regulation but also by Flexible AC Transmission System devices (FACTS). These devices are increasingly used in power systems. This paper presents a systematic procedure for modelling and simulation of a single-machine infinite-bus power system installed with a Static VAR Compensator (SVC). So the impact of the SVC on power system stability can be reasonably evaluated. Genetic algorithm (GA) optimization technique is applied to design robust power system stabilizer and SVC-controllers for single-machine infinite-bus (SMIB) and is employed to search for optimal controller parameters.

Improving the Transient Stability of Nigerian 330kv Transmission Network Using Static Var Compensation Part I: The Base Study

“…The reactor current IL is positive, while the capacitor current IC is negative. Thus, SVC current (ISVC) value at maximum var is expressed as follows: ≤ ž [32] where α is the gate firing angle and hence g " = m •'" × oe " ( ) (16) Since no active power is taken by the SVC, the reactive power consumed can be expressed as:…”