Capacitor series compensation wiring diagram

What happens if a capacitor is connected in series?

When capacitors are connected in series, the effect is similar to a single capacitor with increased distance between the two plates resulting to reduced capacitance. The total capacitance value is less than any of the initial value of the capacitors. Below is a schematic diagram showing the equivalent circuit of the combined capacitor:

What is a series capacitor used for?

Control of voltage. Series capacitors are used in transmission systems to modify the load division between parallel lines. If a new transmission line with large power transfer capacity is to be connected in parallel with an already existing line, it may be difficult to load the new line without overloading the old line.

What are the benefits of series capacitors in a transmission line?

Thus with series capacitor in the circuit the voltage drop in the line is reduced and receiving end voltage on full load is improved. Series capacitors improve voltage profile. Figure 2 Phasor diagram of transmission line with series compensation. Series capacitors also improve the power transfer ability.

What is series compensation?

Definition: Series compensation is the method of improving the system voltage by connecting a capacitor in series with the transmission line. In other words, in series compensation, reactive power is inserted in series with the transmission line for improving the impedance of the system. It improves the power transfer capability of the line.

How many series capacitors should be installed in a transmission line?

The recommended value of degree of compensation is 25 to 75 Series capacitors are installed either at both ends of the EHV and UHV transmission line i.e. at sending end and receiving end sub-station or in an intermediate compensating switching sub-station.

Where are series capacitors installed?

Series capacitors are installed either at both ends of the EHV and UHV transmission line i.e. at sending end and receiving end sub-station or in an intermediate compensating switching sub-station. In this topic, you study Series Compensation – Definition, Theory, Diagram, Advantages, & Applications.