What is the restoration voltage range for effective transmission operation?

The restoration voltage range for effective transmission operation is typically recognized as 90% to 105%. This range is crucial because it ensures that the transmission system can maintain stable and efficient performance during various operational conditions, including normal and emergency situations.

When voltage levels fall below 90%, the system may experience issues such as reduced operational efficiency or increased losses, which can compromise the reliability of electricity supply. On the other hand, voltages above 105% can lead to overvoltage conditions, which may damage equipment and result in safety hazards. Thus, the range of 90% to 105% is established as optimal for maintaining the health of the transmission network while minimizing risks associated with voltage fluctuations.

This understanding is essential for operators, as it dictates the acceptable limits when restoring power after outages or while managing system operations, ensuring that the infrastructure operates within safe and effective parameters.