Modeling of FACTS Devices and Their Application in Intersystem Tie Lines of the United Power System of Central Asia (original) (raw)

FACTS Flexible Alternating Current Transmission Systems

Increased demands on transmission, absence of long-term planning and the need to provide open access to generating companies and customers have created tendencies toward less security and reduced quality of supply. The FACTS technology is essential to alleviate some but not all of these difficulties.

POWER SYSTEM STABILITY AND QUALITY IMPROVEMENT USING FACTS DEVICES

The advent of the 21st century brought about great and enormous quantum of electrical energy needs of the world where the nation’s lively hood is now greatly hinged on the use and application of electrical energy. Recent research shows that the demand of electric power has grown significantly where as power generation and transmission is not expanded due to certain limitations and as a result the transmission lines are being over loaded and losses are inevitable which result to instability of the power system network. Interestingly however, the above limitations are being overcome through the application of flexible alternating current transmission system (FACTS) devices for quality improvement of power transmission systems. The use of FACTS controllers allows the possible control of dynamic control of transmission line variables which include the phase angle, the voltage and the impedance. Similarities between conventional methods and FACTS controller for enhancing power system quality has been considered. The publication focuses on utilizing FACTS devices for the benefits of enhancing electrical power transmission system operation. Classifications of FACTS devices as well as the evolving generation of FACTS controllers have been reviewed. Key Words: - FACTS, Quality, PST, SVC, TCSC, UPFC, STATCOM, IPFC, SSSC, TCPS, SMES

Importance of Facts Controllers in Power Systems

2011

Economic growth of the country is directly depicted with the development of electric power sector. As electricity demand continues to rise, there is an immediate need to increase the quality and reliability of today's highly complex power systems. Traditional power flows from power stations to the nearest big city are giving way to more complex patterns. Growth in the use of renewable sources also becomes a problem, as these generations are often located in remote regions where the power grid is traditionally weak. Construction of new transmission systems is not always the best option due to environmental crisis, land use, permit granting and cost considerations. In these aspects Flexible AC Transmission Systems (FACTS) technology with relatively low investment, compared to new transmission or generation facilities allows the industries to enhance power system performance, improve quality of supply and also provide an optimal utilization of the existing resources. This paper dis...

INFLUENCE OF FACTS DEVICES ON ELECTRICAL TRANSMISSION SYSTEM

IAEME PUBLICATION, 2020

This report contains the study of Flexible AC Transmission System (FACTS) equipment operation in transmission systems. In the present scenario the demand for electrical energy has increased manifold. This has led to the facing of power transmission limitation crisis by energy transmission systems. The limitations occur due to maintaining a balance between supplying the allowed level of voltage and maintaining stability of the system. Due to the power crisis the FACTS devices play a crucial role in the present scenario. In energy transmission systems FACTS are effective equipments on power control. They help facilitating the improvement in power transmission capability while minimising the transmission losses and impact on the environment. They also aid in the improvement of power quality while maintaining the stability of the system.The principal operating modes and applications of FACTS equipment in transmission and distribution system such as Static Var Compensator (SVC), Static Synchronous Compensator (STATCOM), Thyristor controlled series capacitor (TCSC), Static Synchronous Series Compensator (SSSC) and Unified Power Flow Controller (UPFC) is discussed in this report. The characteristics of FC-TCR and UPFC were studied and their models were simulated in Matlab using simulink. In Fixed capacitor Thyristor Controlled Reactor the regulation of power flow was done by changing the firing angle of the thyristor. The compensation obtained was better than that of a normal transmission line. In case of Unified Power Flow Controller the injected voltage and the injected current were the control parameters. The power flow can be regulated by changing the magnitude or phase of the injected voltage while for the injected current the value of the injected current and the shunt resistance are varied for regulating power flow

FACTS Modeling and Simulation in Power Networks

— This paper presents the mathematical steady-state modeling of Static Synchronous Compensator, which is the most widely used member of Flexible Alternating Current Transmission Systems. STATCOM Power Injection Model, derived from one voltage source representation, is presented and analyzed in detailed. A program, Flexible Alternating Current Transmission Systems Power Flow in MATLAB has been developed which extends conventional Newton-Rap son algorithm based on the Power Injection Model .The STATCOM PIM and Current Injection Model implemented in Power System Analysis Toolbox are incorporated in a 5-bus system. The results obtained from simulation of the 5-bus using FACTSPF are matched with those of PSAT in acceptable tolerance and thus confirms the robustness of the PIM.

Effects of FACTS devices on power systems voltage stability

2000 TENCON Proceedings. Intelligent Systems and Technologies for the New Millennium, 2000

This paper presents a study of FACTS devices mainly static VAr compensator (SVC) and controlled series compensator (CSC). Their steady-state modeling and effects on power system performance have been studied. It also studies static stability improvement of a power system and hence power flow improvement in the network. Standard stability evaluation technique has been used to identify the optimum place for the implementation of flexible AC transmission system (FACTS) devices and the effects of FACTS on system loadability has been studied and presented here. The technique to identify the optimum location for the placement of FACTS devices is based on the concept of maximum power transferring capability of the lines and buses. The study has been carried out on the IEEE 24 and 118 bus test systems. Study reveals that incorporation of FACTS devices significantly enhanced system stability as well as power transfer capability of the system. Published in: 2000 TENCON Proceedings. Intelligent Systems and Technologies for the New Millennium (Cat. No.00CH37119)