Transmission Expansion Planning in Deregulated Power ... - tuprints

2 Transmission Expansion Planning Approaches 10
• Selection of the optimal alternative
• Prioritization of the decision alternatives by ranking fuzzy appropriateness indices
• Selection of the decision alternative with highest priority as the optimal alternative
2.1.2 Transmission Expansion Planning Approaches for Deregulated Power Systems
From the viewpoint of transmission planner, there are two major differences between
transmission expansion planning in regulated and deregulated environments:
• Objectives of transmission expansion planning in deregulated power systems differ
from those of the regulated ones.
• Uncertainties in deregulated power systems are much more than in regulated ones.
In this section objectives of transmission expansion planning in deregulated power systems
and uncertainties in deregulated power systems are discussed.
2.1.2.1 Objectives of Transmission Expansion Planning in Deregulated Power Systems
In general, the main objective of transmission expansion planning in deregulated power
systems is to provide a non-discriminatory competitive environment for all stakeholders,
while maintaining power system reliability. Specifically, the objective of transmission
expansion planning is providing for the desires of stakeholders. The desires of stakeholders in
transmission expansion are:
• encouraging and facilitating competition among electric market participants [18], [22],
[28]-[32],
• providing non-discriminatory access to cheap generation for all consumers [18], [22],
[30], [33], [35],
• minimizing the risk of investments against all uncertainties [15]-[21], [24], [28], [36]-[40],
• minimizing the costs of investment and operation [2], [20]-[21],
• increasing the reliability of the network [2], [37]-[38], [41]-[46],
• increasing the flexibility of system operation [2],
• reducing network charges [2],
• minimizing the environmental impacts [2], [18], and
• increasing the value of the system [12], [17], [36], [41]-[46].
The above objectives have different degrees of importance from the viewpoint of different
stakeholders. On the other hand, stakeholders have different weights of importance in