The change in system voltage and frequency with changing load creates problem in power system stability. For the sake of system stability and reliability, the reactive power compensation is essential for flexible AC transmission system (FACTS). The variation of reactive power causes impact on the generating units, lines, circuit breakers, transformers, relays and isolators. However the reactive...

This paper aims to apply Negative Imaginary (NI) systems theory non-square LTI systems, for example, flexible structure with redundant sensors and actuators. The proposes static pre- post-compensation schemes transform stable fat (i.e. no. of inputs more than the outputs) tall outputs inputs) plants into class Strongly Strict (SSNI) a subset Strictly (SNI) systems. proposed compensators can als...

In this paper, the ability of Immune Algorithm (IA) is investigated for VAr planning with the Static Var Compensator (SVC) in a large-scale power system. To enhance voltage stability, the planning problem is formulated as a multi-objective optimization problem for maximizing fuzzy performance indices. The multi-objective VAr planning problem is solved by the fuzzy IA and the results are compare...

This work focuses on the possibility of using a tuned inductor in electric power systems with adaptive features. The presented idea operation, an interaction magnetic fluxes, is new approach to designing such devices. Examples are devices for improving quality electricity. Therefore, various types ‘compensators’ reactive (or both and distortion power) used electrical as preventive measure. indu...

The problem of pole assignment, by static output feedback controllers has been tackled as far as solvability conditions and the computation of solutions when they exist by a powerful method referred to as global linearisation. This is based on asymptotic linearisation (around a degenerate point) of the pole placement map. The essence of the present approach is to reduce the multilinear nature o...

The paper presents some considerations regarding the structure and behaviour of the static var compensator (SVC). Thus, starting from a structure of the compensator it determinates the fundamental impedance of the SVC and it analyses the dependence of the impedance v.s. the components elements (C, R, Lc). Also, it has been realised and the analyses regarding the overvoltages which can appears o...

The problem of pole assignment, by static output feedback controllers has been tackled as far as solvability conditions and the computation of solutions when they exist by a powerful method referred to as global linearisation. This is based on asymptotic linearisation (around a degenerate point) of the pole placement map. The essence of the present approach is to reduce the multilinear nature o...

This article presents a control scheme in the stationary reference frame for static synchronous compensators (STATCOMs) that provide three features: 1) regulation of positive-sequence voltage to nominal value; 2) full cancellation negative-sequence voltage; and 3) peak limitation injected currents. These features can help improve performance these devices under perturbed grid conditions, includ...