Corona and its effects

What causes overvoltages in the power system due to corona?

• a) Lightning strikes

• b) Faults and short circuits

• c) High-voltage transmission lines

• d) Generator malfunctions

How does corona-induced overvoltage affect the power system?

• a) Increase power system stability

• b) Decrease power system losses

• c) Cause radio interference and power losses

• d) Improve power quality

Which of the following is an effect of corona-induced overvoltage on the power system?

• a) Increased power transmission efficiency

• b) Reduced line losses

• c) Decreased system reliability

• d) Audible noise and ozone formation

Which equipment in the power system is most vulnerable to corona-induced overvoltage?

• a) Transformers

• b) Circuit breakers

• c) Insulators

• d) Power cables

How can the effects of corona-induced overvoltage be mitigated in the power system?

• a) Installing corona rings on high-voltage conductors

• b) Increasing power generation capacity

• c) Using thicker power cables

• d) Reducing power demand

What is corona?

• a) A type of lightning discharge

• b) A fault in the power system

• c) A phenomenon where electrically charged particles are released from a conductor

• d) A surge caused by generator malfunctions

How does corona affect power system equipment?

• a) Enhances equipment performance

• b) Reduces equipment temperature

• c) Causes insulation deterioration and increased power losses

• d) Improves power factor

What factors can contribute to corona in power lines?

• a) High humidity and rain

• b) Low temperature and snow

• c) Low wind speed and clear weather

• d) High altitude and lightning activity

What is the primary cause of corona-induced overvoltage?

• a) Line-to-line faults

• b) Excessive line voltage

• c) High line impedance

• d) Insufficient grounding

How does corona affect power system reliability?

• a) Enhances system reliability

• b) Improves power flow

• c) Increases the risk of flashover and equipment damage

• d) Reduces voltage fluctuations