1. SIMULATION AND IMPLEMENTATION OF FC-TCR

2. ABSTRACT
There is a continuous rise in demand of electrical power. To meet this rise, the growth in generation is essential, which is not always possible due to various limitations like environmental, financial, resources, land, etc. Expansion of transmission network is always not easy. Due to these problems, the entire power system is operated at its highest capacity which may generate problems of stability, voltage collapse and grid failure. To provide stable, secure and quality power supply to end users and to utilize available transfer capacities in better way, Flexible AC transmission systems (FACTS) controllers are used to enhance power system stability along with their main application of power flow control .
The TCR system is simulated using MATLAB and the simulation results are presented.

3. INTRODUCTION
There are many static and dynamic devices included in the system. To increase the loading of the existing AC transmission system, Problem of Voltage flicker and voltage stability has become important subject in Power system. Better utilisation of existing power system capacities by installing new devices such as Flexible AC Transmission System (FACTs) has become very important. Here in this modelling of the FC-TCR are verified using the MATLAB/Simulink

4. CONTD
The TCR system is simulated using MATLAB and the simulation results are presented. The power and control circuits are simulated. The current drawn by the TCR varies with the variation in the firing angle. The experimental results are compared with the simulation results. The modern system is complex

5. Two types of SVCs are used frequently.
(i) Fixed Capacitor-Thyristor Controlled Reactor (FC-TCR)
(ii) Thyristor Switched Capacitor-Thyristor Controlled Reactor (TSC-TCR)

6. STATIC VAR
Static VAR systems are applied by utilities in transmission applications for several purposes. The primary purpose is usually for rapid control of voltage at weak points in a network. Installations may be at the midpoint of transmission interconnections or at the line ends [3]. Static Var Compensators are shunt connected static generators / absorbers whose outputs are varied so as to control voltage of the electric power systems.

8. FC-TCR

9. FC-TCR
The TCR continuously provides controllable reactive power only in the lagging power factor range. To extend dynamic controllable range to the leading power-factor range, a fixed capacitor bank in shunt with the TCR
The Fixed Capacitor Thyristor-Controlled Reactor (FCTCR) is a var generator arrangement using a fixed (permanently connected) capacitance with a thyristor controlled reactor.

10. ADVANTAGES POWER QUALITY MANAGEMENT.
LESS ACTIVE & REACTIVE POWER LOSS.
VOLTAGE& POWER PROFILE IMROVEMENT.
VOLTAGE STABILITY.
SECURITY IMPROVEMENTS.

11. CONCLUSION
Thus it is been concluded that reactive power variation is smoother by using fc-tcr. The variation of reactive power with the variation in the firing angle is studied. The circuit model; of fc-tcr is obtained and the same is used for simulation using MATLAB Simulink.