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The overvoltage that occur mainly under converter stations are due to _________
(i) Lightening and switching overvoltage
(ii) Transients produced in conductors
(iii) Overvoltage due to fault clearing
Choose the correct option.
(i) Lightening and switching overvoltage
(ii) Transients produced in conductors
(iii) Overvoltage due to fault clearing
Choose the correct option.
- a)(i), (ii), (iii)
- b)(ii), (iii)
- c)(iii)
- d)(i), (ii)
Correct answer is option 'A'. Can you explain this answer?
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The overvoltage that occur mainly under converter stations are due to ...
Overvoltage in Converter Stations
The correct answer is option 'A' which states that the overvoltage that occurs mainly under converter stations is due to lightning and switching overvoltage, transients produced in conductors, and overvoltage due to fault clearing. Let's discuss each of these factors in detail:
1. Lightning and Switching Overvoltage:
- Lightning strikes and switching operations can cause overvoltages in converter stations.
- Lightning strikes produce a surge of high voltage and current that can travel through conductors and affect the converter station equipment.
- Switching operations, such as the opening and closing of circuit breakers, can generate transient overvoltages due to the sudden change in current flow.
2. Transients Produced in Conductors:
- Transients are sudden, brief fluctuations in voltage or current that can occur in power systems.
- These transients can be induced in conductors due to various factors such as lightning, switching operations, and fault conditions.
- When transients occur in the conductors of a converter station, they can cause overvoltages that can damage the equipment.
3. Overvoltage Due to Fault Clearing:
- Faults in power systems, such as short circuits or ground faults, can cause overvoltages during the clearing process.
- When a fault occurs, protective devices such as circuit breakers are activated to isolate the faulty section of the system.
- The interruption of fault current can result in overvoltages that can propagate through the system, including the converter station.
Conclusion:
In conclusion, the overvoltages that mainly occur under converter stations are due to a combination of factors including lightning and switching overvoltage, transients produced in conductors, and overvoltage due to fault clearing. These overvoltages can pose a risk to the equipment and need to be properly managed and protected against to ensure the reliable operation of the converter station.
The correct answer is option 'A' which states that the overvoltage that occurs mainly under converter stations is due to lightning and switching overvoltage, transients produced in conductors, and overvoltage due to fault clearing. Let's discuss each of these factors in detail:
1. Lightning and Switching Overvoltage:
- Lightning strikes and switching operations can cause overvoltages in converter stations.
- Lightning strikes produce a surge of high voltage and current that can travel through conductors and affect the converter station equipment.
- Switching operations, such as the opening and closing of circuit breakers, can generate transient overvoltages due to the sudden change in current flow.
2. Transients Produced in Conductors:
- Transients are sudden, brief fluctuations in voltage or current that can occur in power systems.
- These transients can be induced in conductors due to various factors such as lightning, switching operations, and fault conditions.
- When transients occur in the conductors of a converter station, they can cause overvoltages that can damage the equipment.
3. Overvoltage Due to Fault Clearing:
- Faults in power systems, such as short circuits or ground faults, can cause overvoltages during the clearing process.
- When a fault occurs, protective devices such as circuit breakers are activated to isolate the faulty section of the system.
- The interruption of fault current can result in overvoltages that can propagate through the system, including the converter station.
Conclusion:
In conclusion, the overvoltages that mainly occur under converter stations are due to a combination of factors including lightning and switching overvoltage, transients produced in conductors, and overvoltage due to fault clearing. These overvoltages can pose a risk to the equipment and need to be properly managed and protected against to ensure the reliable operation of the converter station.
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