What is the approximate MVAR/mile for a 345 kV overhead line?

The approximate MVAR (megavolt-amperes reactive) per mile for a 345 kV overhead line is typically around 3/4 or 1. This measure reflects the reactive power capacity of the transmission line, which is an important consideration for power system engineers when planning the efficiency and stability of electrical networks.

A 345 kV line is designed for high-voltage transmission, allowing for a significant amount of reactive power to be managed over long distances. The specific values you might encounter in practice can vary based on line design, construction materials, and geographical factors, but the reference point of 3/4 or 1 MVAR per mile aligns with industry practices and helps in making accurate calculations for reactive power management.

Keeping this value in mind is critical when evaluating the performance parameters of transmission lines, integrating into larger electrical systems, and ensuring that adequate reactive power compensation strategies are applied where necessary. Overall, understanding these values allows professionals to design and operate better power systems, maintaining reliability and efficiency.