Table of Contents
- 1 How the series reactive compensation of transmission line improves its transient stability?
- 2 What is the purpose of series capacitor?
- 3 What is the effects of series capacitors on distribution system?
- 4 What are the effects of series and shunt capacitors?
- 5 How series capacitors control the voltage in distribution system?
- 6 What are the problems with series compensation?
- 7 How do you increase the stability of a power line?
- 8 What is the relationship between system voltage and critical clearing angle?
How the series reactive compensation of transmission line improves its transient stability?
One of the methods to improve transient stability is series compensation of lines. By reducing effective inductive reactance of the line peak synchronizing power capability, steady state stability and therefore transient stability of the system can be increased.
What is the purpose of series capacitor?
Series capacitors are used to compensate the inductance of transmission line. They will increase the transmission capacity and the stability of the line. These are also used to share the load between parallel lines.
What is the effects of series capacitors on distribution system?
Series Capacitors are generally applied to compensate the excessive inductance of long transmission lines, in order to reduce the line voltage drop, improve its voltage regulation, minimize losses by optimizing load distribution between parallel transmission lines, and to increase the power transfer capability.
Why series capacitors are used for compensation and what are the problems associated with this?
Problem associated with Series capacitor The series compensated line produces series resonance at frequencies lower than power frequencies. This is known as sub-synchronous resonance. The sub-synchronous produces mechanical stress due to which high torsional stress occurs in the rotor shaft.
What is series capacitor in transmission line?
Series capacitors are used to compensate the inductance of transmission line. Series capacitors will increase the transmission capacity and the stability of the line. Series capacitors are also used to share the load between parallel lines.
What are the effects of series and shunt capacitors?
The effects of series and shunt capacitance withstand the high current. Due to the series connection and the inductivity of the line there can be a resonance occurring at a certain capacitive value. This will lead to very low impedance and may cause very high currents to flow through the lines.
How series capacitors control the voltage in distribution system?
The series capacitive compensation represents an effective method by voltage control in distribution networks. A series capacitor installed to an electrical line causes a boost in voltage at the capacitor location that is proportional to current magnitude and the sine of power factor angle.
What are the problems with series compensation?
Disadvantages 1. Increase in fault current 2. Mal operation of distance relay- if the degree of compensation and location is not proper. 3.
What are the effects of series capacitors in transmission lines?
Effects of series capacitors in transmission lines. Abstract: THE LOAD capability and performance of high-voltage transmission lines can be improved by the installation of series capacitors. Some reasons for the application of series capacitors to transmission circuits are: 1. To effect the desired load division between parallel circuits.
How do you increase transient stability of a circuit?
Increasing System Voltage: Transient stability is improved by raising the system voltage profile, (i.e., raising E and V). Increase in system voltage means the higher value of maximum power, P max that can be transferred over the lines.
How do you increase the stability of a power line?
The compensation of line reactance by series capacitors is another method of improving stability. For lines longer than 325 km this method has proved economical as a means of increasing stability. The use of shunt reactors will reduce the danger of instability on lightly loaded lines.
What is the relationship between system voltage and critical clearing angle?
Increase in system voltage means the higher value of maximum power, P max that can be transferred over the lines. Since shaft power, P s = P max sin δ, therefore, for a given shaft power initial load angle δ 0 reduces with the increase in P max and thereby increasing difference between the critical clearing angle and initial load angle.