What is the function of thyristor-controlled reactor?

In an electric power transmission system, a thyristor-controlled reactor (TCR) is a reactance connected in series with a bidirectional thyristor valve. The thyristor valve is phase-controlled, which allows the value of delivered reactive power to be adjusted to meet varying system conditions.

How do I set the firing angle of a thyristor in Matlab?

2 Answers

  1. 1/(f)=time period of wave of frequency f.
  2. 1/(2*f)= time of half wave=Pi rad=180 Deg.
  3. if f=60 Hz then half wave period 1/(2*60)=1/120=8.33 mSe.
  4. 1/160=6.25 mSec.
  5. firing angle =6.25*180/8.33=135 deg.
  6. means Matlab Factor =1/((2*f)*(180/firing angle))

How do I add power electronics in Matlab?

Simulation of the TCR Branch

  1. Enter power_new at the command line to open a new model.
  2. Add a Thyristor block from the Simscape > Electrical > Specialized Power Systems > Power Electronics library to the model.
  3. Open the Thyristor Block Parameters window and set the parameters as follows:

What is fixed capacitor thyristor-controlled reactor?

The fixed capacitor, thyristor-controlled reactor type var generator may be considered essentially to consist of a variable reactor (controlled by delay angle a) and a fixed capacitor, with an overall var demand versus var output characteristic as shown in Figure 1(b).

What is the firing angle of thyristor?

zero degrees
Because the firing angle is zero degrees, the thyristor acts like a diode, and the output voltage is a half-rectified sine wave.

How do you calculate the firing angle of a thyristor?

For zero input power the thyristor firing angle must be α = 180° or 360°, so that the output current will be zero. Therefore, for α = αmax = 180°, the output power Ρο = 0. Therefore, the range of the firing angle α is π 4 ≤ α ≤ π .

Why is Simulink used in the power field of electrical engineering?

Power electronics engineers use MATLAB® and Simulink® to develop digital control systems for motors, power converters, and battery systems.

How do you simulate electrical circuits in Matlab?

Building the Electrical Circuit with the Simscape Electrical Specialized Power Systems Library

  1. To open the Simscape Electrical Specialized Power Systems main library, at the MATLAB® command prompt, enter:
  2. Open a new blank model to contain your first circuit and save it as circuit1 .

What is the full form of FC TCR *?

A fixed capacitor-thyristor controlled reactor (FC-TCR) type of power factor compensator with thyristor-controlled series R-L load is analysed using an approximate and also a more exact circuit.

What is the main function of thyristor?

The primary function of a thyristor is to control electric power and current by acting as a switch. For such a small and lightweight component, it offers adequate protection to circuits with large voltages and currents (up to 6000 V, 4500 A).

What is the Simulink model of single phase thyristor controlled reactor?

The SIMULINK model of single phase thyristor controlled reactor is shown in Fig 2.1. In this model current through the reactor is controled with triggering the thyristor at different firing angle α (i.e. from 90º to 180º) [5]. Triggering pulses to the thyristor is also simulated in MATLAB.

What is the function of thyristor controlled reactor?

Thyristor Controlled Reactor. Thyristor controlled reactor consist reactor L placed in series with the thyristor valve. This reactor is the controlled element of the TCR, and it controls the thyristor valve. TCR consists two opposite poled thyristor which conducts every alternate half cycles of the supply.

How to control the gate of the thyristor using the Simulink library?

Simulink signal to control the gate of the Thyristor. The Simulink output of the block is a vector containing two signals. You can demultiplex these signals by using the Bus Selector block provided in the Simulink library. The Thyristor block implements a macro model of the real thyristor.

How do you simulate a thyristor?

The thyristor model is simulated as a resistor Ron, an inductor Lon, and a DC voltage source representing the forward voltage Vf, connected in series with a switch. The switch is controlled by a logical signal depending on the voltage Vak, the current Iak, and the gate signal g.