Abstract: The deregulated power system is quite popular in now a days. The increased power demand has forced the power system to operate very closer to its stability limits. So transmission congestion and voltage instability problems are arise in the power system. Due to the congestion in the network, not always possible to transmit the all contracted power. Congestion management is a tough tas...

In this paper, the nearly instantaneous response of the seriesconnected VSC-based FACTS controllers when used to limit possible fault currents in a compensated line, will be presented. The effectiveness of both FACTS controllers (SSSC and UPFC) towards this system condition was investigated exploring the series voltage effect upon the line. Moreover, it will be shown that the UPFC shunt convert...

The current major restructuring of the electricity market and the advances of new technology add new complexities in the power system application software, particularly optimization. Minimization of the impact of a transaction on unrelated thirdparty facilities, or maximization of the power transfer between utilities must now be formulated as new constraints or objective functions. The dispatch...

This paper discusses the use of Genetic Algorithm (GA), Differential Evolution (DE) and Particle Swarm Optimization (PSO) based approach for the allocation & coordinated operation of multiple Flexible AC Transmission System (FACTS) devices for the economic operation as well as to increase power transfer capacity of an interconnected power system under different loading conditions. These Evoluti...

In this paper fuzzy controllers are designed for FACTS devices in interconnected power systems. Two typical FACTS devices, STATCOM and UPFC, are used as examples to show that FACTS devices with well designed fuzzy controllers can improve interconnected power system dynamic behavior significantly.

In developing countries, a pressure associated with economical and environmental constraints has forced the power utilities to meet the future demand by fully utilizing the existing resource of transmission facilities without building new lines. Flexible alternating current transmission systems (FACTS) devices are used to control the phase angle, voltage and impedance of high voltage AC lines. ...

FACTS technology opens up new opportunity for operation and control of power system. Out of the various FACTS devices (viz-TCSC, TCPST, UPFC etc.), the right choices for the maximization of power flow in power system network demands attention which helps to achieve the active power flow up to their line limits without any constraint violation and with optimal investment on FACTS devices. In thi...

In this paper, use of Differential Evolution (DE) based and Particle swarm optimization (PSO) based algorithm for the allocation & coordinated operation of multiple FACTS (Flexible AC Transmission System) devices for the improved power transfer capacity and economic operation of an interconnected power system is presented. Both the DE and PSO based approach is applied on IEEE 30-bus system. The...

Considering aging power system infrastructures in conjunction with increased electricity trading activities, there is a strong need for future investments in electricity grids. Technological progress has made available a number of different investment alternatives, ranging e.g. from “standard” reinforcements of existing transmission capacities to the installation of Flexible AC Transmission Sys...