Grid synchronization failure can cause _____.

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ALP CBT 2 Electrician Previous Paper: Held on 22 Jan 2019 Shift 3
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  1. Higher power noise
  2. Lower power factor
  3. Heavy harmonics
  4. Burnt generator

Answer (Detailed Solution Below)

Option 1 : Higher power noise
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  • Grid synchronization failure occurred when the voltage and frequency of the grid are beyond the acceptable limits.
  • This condition causes higher power noise.
  • There are several power generation units such as hydro, thermal, solar, etc connected to the grid to supply power to the load.
  • These generating units need to supply power according to the rules of the grid. These rules involve maintaining a voltage variation within limits and also the frequency.
  • If any deviation from the acceptable limit of the grid it is mandatory that the same feeder should automatically get disconnected from the grid, which is termed as islanding.
  • This prevents large scale brownout or blackout of the grid power.
  • So it is preferable to have a system that can warn the grid in advance so that alternate arrangements are kept on standby to avoid complete grid failure.
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