Question

According to Foust and Menger, the corona loss (P_c) is proportional to Where V is the actual voltage of the conductor?
1. V²
2. V³
3. V
4. √V

Answer 1

Correct Answer - Option 2 : V³

Corona loss:

The power dissipated in the system due to corona discharges is called corona loss. Accurate estimation of corona loss is difficult because of its variable nature. It has been found that the corona loss under fair weather conditions is less than under foul weather conditions.

Corona loss formulae:

1. Based on voltage:

Linear relationship:

Skilling's formula: P_c ∝ V – V₀

Quadratic relationship:

Peek's formula: P_c ∝ (V – V₀)²

Ryan and Henline formula: P_c ∝ V (V – V₀)

Peterson's formula: P_c ∝ V²F (V/V₀), where F is an experimental factor  

Cubic Relationship:

Foust and Menger formula: P_c ∝ V³

Prinz's formula: P_c ∝ V² (V – V₀)

2. Based on voltage gradients:

Nigol and Cassan formula: P_c ∝ E₂ ln (E/E₀)

Project EHV formula: P_c ∝ V.Em, m = 5