Transmission Expansion Planning in Deregulated Power ... - tuprints

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Transmission Expansion Planning in Deregulated Power ... - tuprints

2 Transmission Expansion Planning Approaches 4

can be classified in:

• static, and

• dynamic approaches.

In static planning the planner seek the optimal plan for a single year on the planning horizon,

that is, planner answer only to the questions “what” transmission facilities must be added to

the network and “where” they must be installed. In dynamic planning multi year is considered

and planners seek the optimal strategy along the whole planning period. On the other word, in

dynamic planning in addition to “what” and “where” planners answer to the question “when”

the transmission facilities must be installed in planning horizon.

From the viewpoint of power system structures, transmission expansion planning approaches

can be classified in transmission expansion planning approaches for:

• regulated, and

• deregulated power systems.

The main objective of expansion planning in regulated power systems is to meet the demand

of loads, while maintaining reliability and service quality of power system. In this

environment uncertainty is low. Transmission expansion planning is centralised and

coordinated with generation expansion planning. Planners have access to the required

information for planning. In these systems location of loads and generations, size of loads and

generating units, availability of units, load pattern, and dispatch pattern are known. Therefore,

planners can design the least cost transmission plan based on the certain reliability criteria.

Transmission planning in regulated systems is modelled with a deterministic optimization.

The objective function is cost of planning and operation, with technical and economical

constraints. In general this optimization is a nonlinear mixed-integer constraint optimization.

Different mathematical and heuristic approaches have been proposed to solve this problem [1].

Deregulation has changed the objective of transmission expansion planning and increased the

uncertainties of power systems. Due to these changes, new approaches are needed for

transmission expansion planning. The goal of this dissertation is to present a transmission

expansion planning approach for deregulated environments. Hence, here the publications on

non-deterministic transmission expansion planning approaches and transmission expansion

planning approaches for deregulated environments are reviewed [3]. The bibliographies of the

publications on transmission expansion planning approaches for regulated environments are

presented in [1].

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