This paper describes the on-line Voltage Security Assessment environment developed within the framework of the EU-sponsored OMASES project, as well as its application to the Greek Interconnected Power System. The heart of all computations is a fast time-domain method. Security is analyzed with respect to power transfers in critical corridors or power consumption in load areas. Results take on t...

Electric power system is exceptionally complex as far as its managing, construction and operation is concerned. In addition ever increase of electric power demand is making a process of managing, monitoring and controlling of electric power system more challenging day by day. Due to increased power demand congestion takes place in some of the lines. To remove congestion and improve loadability ...

In this brief, the margin of stability of two-dimensional (2D) discrete systems is considered. A new method to compute the stability margin of 2-D continuous systems is provided. Illustrative examples are also included.

Due to the increasing number of power electronics-based devices in modern systems, there are concerns about impact higher-frequency interactions on system stability. The typically-used algebraic representation networks fails capture these newly emergent issues, but dynamically modelling entire network with differential equations will lead a prohibitively long simulation time. This paper propose...

in this paper, we present a new method to determine the optimal location and parameter settings of unifiedpower flow controller (upfc) for removing voltage violations and transmission lines overloading. upfc isconsidered as the most powerful member of the facts devices, that it can control shunt and series power flow.this option gives to upfc the power to control the voltage profile and transmi...

The gradual expansion of power transmission networks leads to an increase in short-circuit current (SCC), which has impact on the secure operation when SCC exceeds interrupting capacity circuit breakers. In this regard, optimal switching (OTS) is proposed reduce while maximizing loadability with respect voltage stability. However, OTS model a complex combinatorial optimization problem binary de...

Typical bounds on generalization of Support Vector Machines are based on the minimum distance between training examples and the separating hyperplane. There has been some debate as to whether a more robust function of the margin distribution could provide generalization bounds. Freund and Schapire (1998) have shown how a diierent function of the margin distribution can be used to bound the numb...

This paper presents a newly developed proximity indicator for voltage stability assessment which can be used to predict critical real system load and voltages at various buses loading point. The varies almost parabolic with total demand reaches orthogonally axis. relation has been utilized It shown that two operating points are needed estimating point proper selection of variation near collapse...