Do large capacity substations increase power supply capacity?

Large capacity substations in terms of capacity and quantity of transformer can increase the power supply capability of a closed area, but also require a greater number of incoming and outgoing lines from different voltage levels.

How to calculate construction and operation cost of a large capacity substation?

It is assumed that the supply radius of the large capacity substation is R, and the capacity of transformer is S i and N (t) is the number of transformers in the substation in t th year. Then the construction and operation cost of the substation in the i th year can be obtained as follows: (9) f ( i) = f 1 + f 2 + f 3 + f 4 + f 5

Are large-capacity substations adaptable?

With the increasing penetration of renewable energy, the adaptability of the existing substation planning model in terms of capacity and quantity of transformer needs to be further studied when preferring large-capacity substations.

What is a substation radius optimization model?

The second category mainly focuses on the optimal power supply radius. In Ref. , a substation radius optimization model was constructed to find the minimum annual cost per unit of the supply area. Ref. considers the capacity–load ratio constraint applicable to large capacity transformers.

What are the factors affecting substation planning?

Based on the references, existing substation planning models mainly focus on the relationship between three variables: load density, supply radius, and substation capacity. They usually study two of three variables by fixing the remaining one for simplicity.

What are the optimization results for large capacity substation (80 MVA)?

The optimization results for large capacity substation (80 MVA) When the capacity of the transformer is selected as 80 MVA, 2 transformers were put into use for the substation in the first year. When considering renewable energy access, the third transformer was introduced into the substation in the third year.