Skip to main content

Detailed Analysis of SVC: Mechanism and Functionality Explained

 Introduction

Static Var Compensators (SVCs) are pivotal in enhancing the stability and efficiency of power systems. Their ability to regulate reactive power dynamically makes them indispensable in handling voltage instability and power quality issues. In this article, we’ll explore the mechanisms and functionality of SVCs, diving deep into how these devices operate and contribute to modern power systems.

Keywords: SVC Reactive Power Control, Dynamic Voltage Regulation Devices, Power Quality Improvement with SVC, Thyristor-Controlled Reactors and Capacitors

How Does an SVC Operate?

Components of SVC:

  1. Thyristor-Controlled Reactors (TCR):
    TCRs control inductive reactance by adjusting thyristor conduction angles, enabling precise reactive power absorption.

  2. Thyristor-Switched Capacitors (TSC):
    TSCs provide capacitive reactance through thyristor-controlled switching, supplying reactive power as needed.

  3. Harmonic Filters:
    These ensure that harmonics generated by thyristors do not affect system performance.

Control Mechanism:

  • Voltage Sensing: The SVC continuously monitors bus voltage.
  • Control Signal Generation: Based on voltage deviations, the controller decides whether to inject or absorb reactive power.
  • Dynamic Response: Adjustments are made in real time to maintain stability.

Advantages of the SVC Mechanism

  1. Fast Response:
    SVCs can react within milliseconds to voltage fluctuations, ensuring grid stability.

  2. Improved Efficiency:
    By dynamically compensating reactive power, SVCs reduce transmission losses and improve voltage profiles.

  3. Enhanced Power Quality:
    SVCs mitigate voltage flicker and harmonics, ensuring smoother power delivery.

Applications of SVC Mechanism in Power Grids

  1. Voltage Regulation in Transmission Networks:
    SVCs stabilize voltage levels, preventing undervoltage or overvoltage conditions.

  2. Renewable Energy Integration:
    SVCs ensure steady voltage despite the variability of wind and solar power.

  3. Industrial Power Systems:
    SVCs support industries by stabilizing voltage during rapid load changes.

Conclusion
The mechanism and functionality of SVCs make them indispensable for modern grids, ensuring voltage stability and improving power system reliability. Their dynamic operation underpins their growing adoption worldwide.

Labels:

Comments

Post a Comment

Popular posts from this blog

ADVANTAGES AND DISADVANTAGES OF CORONA

Corona has many advantages and disadvantages. In the correct design of a high voltage overhead line, a balance should be struck between the advantages and disadvantages. ADVANTAGES (i) Due to corona formation, the air surrounding the conductor becomes conducting and hence virtual diameter of the conductor is increased. The increased diameter reduces the electrostatic stresses between the conductors. (ii) Corona reduces the effects of transients produced by surges. DIS-ADVANTAGES (i) Corona is accompanied by a loss of energy. This affects the transmission efficiency of the line. (ii) Ozone is produced by corona and may cause corrosion of the conductor due to chemical action. (iii) The current drawn by the line due to corona is non-sinusoidal and hence non-sinusoidal voltage drop occurs in the line. This may cause inductive interference with neighboring communication lines.
Read more

ADVANTAGES OF PER UNIT SYSTEM

PER UNIT SYSTEM The per-unit system expressed the voltages, currents, powers, impedances, and other electrical quantities basis by the equation: Quantity per unit (pu) = Actual value/ Base value of quantity ADVANTAGES OF PER UNIT SYSTEM While performing calculations, referring quantities from one side of the transformer to the other side serious errors may be committed. This can be avoided by using per unit system. Voltages, currents and impedances expressed in per unit do not change when they are referred from one side of transformer to the other side. This is a great advantage. Per unit impedances of electrical equipment of similar type usually lie within a narrow range, when the equipment ratings are used as base values. Transformer connections do not affect the per unit values. Manufacturers usually specify the impedances of machines and transformers in per unit or percent of name plate ratings. Transformers can be replaced by their equivalent series impedances. ...
1 comment
Read more

ABSOLUTE AND SECONDARY INSTRUMENTS

The various electrical instruments may, in a very broad sense, be divided into (i) Absolute Instruments (ii) Secondary Instruments. Absolute Instruments are those which give the value of the quantity to be measured, in terms of the constants of the instrument and their deflection only. No previous calibration or comparison is necessary in their case. The example of such an instrument is tangent galvanometer, which gives the value of current, in terms of the tangent of deflection produced by the current, the radius and number of turns of wire used and the horizontal component of earth’s field.  Secondary Instruments  are those, in which the value of electrical quantity to be measured can be determined from the deflection of the instruments, only when they have been pre-calibrated by comparison with an absolute instrument. Without calibration, the deflection of such instruments is meaningless. It is the secondary instruments, which are most generally used in ev...
Post a Comment
Read more