Abstract
The Flexible Alternating Current Transmission Systems (FACTS) device deals with the control of power flow, alternating current of transmission line and immediately respond towards the stability problems of the system. The present paper show that how the FACTS devices enhance the different parameter of the power systems like power transfer capacity of line, system stability etc. In MATLAB a simplified transmission system is modeled and the resultant power (PQ) and voltage profiles are studied as an uncompensated system. Now the same transmission system is simulating with FACTS device i.e. Static Synchronous Series Compensator (SSSC), Fixed Capacitor Thyristor Controlled Reactor (FC-TCR) and Static Synchronous Compensator (STATCOM). The result obtained after simulation provide the power and voltage profiles, are analyzed as a compensated system. Finally we found that a compensated system have better voltage profile and power flow w.r.t. an uncompensated system.
Highlights
A well-designed power system gives a good quality of reliable supply
When the on load system is faulted, reactive power increases sharply than the problem of voltage instability starts and it causes voltage collapse. This situation comes when system voltage become down to a level from which it can’t be recover. This voltage collapse interrupts power system either partial or full and voltage instability gives a variation in reactive power demand
In static synchronous series compensation the inductive reactance of a line is compensates with a capacitor is connected in series with the transmission line and these is based on Voltage Source Converter
Summary
A well-designed power system gives a good quality of reliable supply. In present the power systems have large, interconnected hundreds of generators and thousands of buses.To meet increases load demand a new power system is added and this system has new generating station, transmission line, distribution system, which affect economically as well as environmentally and take duration of long time. When the on load system is faulted, reactive power increases sharply than the problem of voltage instability starts and it causes voltage collapse. These technologies have property of controlling power and enhancing the capacity of present power system. The advantages of apply FACTS are improvement in load ability and line capacity of the system, increment in power flow capability through the transmission line, less active and reactive power loss, voltage and power profile improvement, power quality improvement, voltage regulation and efficiency of power system operation improvement, voltage stability and security improvement, steady state power flow improvement, loss minimization, dynamic and transient stability improvement, voltage margin improvement.
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