Scope of Biogeography Based Optimization for Economic Load Dispatch and Multi-Objective Unit Commitment Problem

Economic Load Dispatch Problem Formulation

The objective of economic load dispatch of electric power generation is to schedule the committed generating unit outputs so as to meet the load demand at minimum operating cost while satisfying all units and operational constraints of the power system. The economic dispatch problem is a constrained optimization problem and it can be mathematically expressed as follows (Dhillon & Kothari, 2010):

• 1.

  The energy balance equation:

  
  (2)

• 2.

  The inequality constraints:

  
  (3)

• - is Load Demand;

• - is power transmission Loss;

• - is the number of generation buses;

• - is real power generation and will act as decision variable.