Worldwide, due to the abrupt growth of population, load demand has been rising dramatically in last few years. This led an increase branch overloads, voltage deviations, and power losses. These problems may result line outages or occurrence blackouts. Flexible AC transmission system (FACTS) devices can be installed ensure increased flow capability flexible control address these issues. In this ...

1.1 General Introduction During the past two decades, the increase in electrical energy demand has presented higher requirements from the power industry. More power plants, substations, and transmission lines need to be constructed. However, the most commonly used devices in present power grid are the mechanically-controlled circuit breakers. The long switching periods and discrete operation ma...

In this work, real-time evaluation and steps towards implementation of three different types of power oscillation damping controllers (POD) for fast power electronic devices such as FACTS (flexible AC transmission systems) have been done. The performance of classical POD controllers (lead-lags and phasor estimators) are compared with an advanced adaptive approach. The prerequisite for achieving...

This paper describes a method of assessing the value of controllable devices such as Flexible AC Transmission Systems (FACTS) in a liberalized electricity market. A sophisticated algorithm using ac optimal power flow (OPF) is often unnecessarily detailed for the purpose of valuating such projects. Input parameters such as expected future generation mix is hard to guess and error prone. Therefor...

i Corresponding Author, M. R. Tousi is PhD student in Department of Electrical Engineering, Amirkabir University of Technology, Tehran, Iran (e-mail: [email protected]). ii S. H. Hosseininan is with the Department of Electrical Engineering, Amirkabir University of Technology, Tehran, Iran (e-mail: [email protected]). iii M. B. Menhaj is with the Department of Electrical Engineering, Amirk...

In the present scenario of the power system the main issue is the voltage stability enhancement which plays an important role in the complex network. This paper introduces the forthcoming technology employing the integration of Flexible AC transmission System (FACTS) device in to the system. Betwixt of all the FACTS devices this paper mainly rivet on Unified Power Flow Controller (UPFC). This i...

An application of fuzzy logic based control for power systems governing multiple Flexible Alternative Current Transmission System (FACTS) devices is proposed. Several relations have been derived to determine set points of FACTS devices using fuzzy reasoning in order to meet the requirements for power flows. The relations are based on so called coefficients of influence, which are online adapted...

Phase locked loop and synchronization techniques are one of the most important issues for operating grid-interfaced converters in practical applications, which involve Distributed Power Generation Systems, Flexible AC Transmission Systems (FACTS), and High Voltage Direct Current (HVDC) Transmission, and so on. This paper presents a comprehensive review of the recently developed phase locked loo...

Decentralized electricity markets and even more integration of renewables demand expanding the existing transmission infrastructure to accommodate variabilities in power flows inflected by them. However, such expansion is severely limited in many countries due to political and environmental issues. Hence, Transmission System Operators have to use the existing grid creatively, in particular taki...

The current research investigates a new and unique Multi-Objective Generalized Normal Distribution Optimization (MOGNDO) algorithm for solving large-scale Optimal Power Flow (OPF) problems of complex power systems, including renewable energy sources Flexible AC Transmission Systems (FACTS). A recently reported single-objective generalized normal distribution optimization is transformed into the...