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Event Voltage Fluctuation of the Lowest Residual Voltage and the Shortest Period Voltage Dip
The instantaneous high voltage is generated by a lightning strike and it shorts the distribution
cable and tower. Then, the fault current flows and the voltage drops.
To remove this fault, the circuit breaker takes effect , but the voltage drops until that time
(approx. 0.07 to 2s).
This is the instantaneous voltage drop (voltage dip) caused by a lightning strike.
Protective
relay
Transformer
Breaker
2. Problem on distribution
3. Problem on network
4. Instantaneous voltage drop
5. Malfunction of equipment
Path of a Voltage Dip
Protective
relay
Breaker
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