A. Always limited by the conductor size. B. Limited by stability considerationsC. Reduced at low ambient temperatures. D. Decreased by the use of bundled conductors of single conductors. Answer: B. Limited by stability considerationsExplanation: The load carrying capability of a long AC line is limited by stability considerations.- Stability considerations play a crucial role in determining the load carrying capability of a long AC line. This is because as the length of the transmission line increases, various factors such as line capacitance, inductance, and resistance come into play, affecting the stability of the system.
1. Voltage Stability:- One of the major stability considerations in a long AC line is voltage stability. Voltage stability refers to the ability of the system to maintain a constant voltage level at different points along the transmission line. When the load on the line increases, the voltage drop also increases due to the line impedance. If the voltage drop exceeds the acceptable limits, it can lead to voltage instability and voltage collapse, causing a disruption in power supply.
2. Reactive Power Compensation:- Reactive power compensation is another important aspect of stability considerations. Reactive power is required to maintain the voltage level and support the transmission of active power. In long AC lines, reactive power compensation becomes crucial to ensure voltage stability and improve power transfer capability. By using devices such as shunt capacitors and reactors, reactive power can be controlled and managed effectively.
3. Transient Stability:- Transient stability refers to the ability of the system to withstand and recover from sudden disturbances or faults. In long AC lines, transient stability can be affected by factors such as fault currents, line fault impedance, and line reactance. If the system is not designed to handle these transient events, it can lead to voltage dips, oscillations, and even system collapse.
4. Power System Stability Analysis:- To determine the load carrying capability of a long AC line, power system stability analysis is performed. This analysis involves studying the dynamic behavior of the system under various operating conditions and disturbances. By simulating the system response, stability limits can be identified and appropriate measures can be taken to enhance system stability and increase the load carrying capability.
Conclusion:- In conclusion, the load carrying capability of a long AC line is limited by stability considerations. Voltage stability, reactive power compensation, transient stability, and power system stability analysis are all important factors that need to be taken into account to ensure the reliable and efficient operation of long AC transmission lines.
A. Always limited by the conductor size.
B. Limited by stability considerations
C. Reduced at low ambient temperatures.
D. Decreased by the use of bundled conductors of single conductors.
Answer: B. Limited by stability considerations
Explanation:
The load carrying capability of a long AC line is limited by stability considerations.
- Stability considerations play a crucial role in determining the load carrying capability of a long AC line. This is because as the length of the transmission line increases, various factors such as line capacitance, inductance, and resistance come into play, affecting the stability of the system.
- One of the major stability considerations in a long AC line is voltage stability. Voltage stability refers to the ability of the system to maintain a constant voltage level at different points along the transmission line. When the load on the line increases, the voltage drop also increases due to the line impedance. If the voltage drop exceeds the acceptable limits, it can lead to voltage instability and voltage collapse, causing a disruption in power supply.
- Reactive power compensation is another important aspect of stability considerations. Reactive power is required to maintain the voltage level and support the transmission of active power. In long AC lines, reactive power compensation becomes crucial to ensure voltage stability and improve power transfer capability. By using devices such as shunt capacitors and reactors, reactive power can be controlled and managed effectively.
- Transient stability refers to the ability of the system to withstand and recover from sudden disturbances or faults. In long AC lines, transient stability can be affected by factors such as fault currents, line fault impedance, and line reactance. If the system is not designed to handle these transient events, it can lead to voltage dips, oscillations, and even system collapse.
- To determine the load carrying capability of a long AC line, power system stability analysis is performed. This analysis involves studying the dynamic behavior of the system under various operating conditions and disturbances. By simulating the system response, stability limits can be identified and appropriate measures can be taken to enhance system stability and increase the load carrying capability.
- In conclusion, the load carrying capability of a long AC line is limited by stability considerations. Voltage stability, reactive power compensation, transient stability, and power system stability analysis are all important factors that need to be taken into account to ensure the reliable and efficient operation of long AC transmission lines.