Power System Operation and Control

3

Economic Load Dispatch-II

OBJECTIVES

After reading this chapter, you should be able to:

• develop the mathematical model for economical load dispatch when losses are considered
• derive transmission loss expression
• study the optimal allocation of total load among the units
• develop a flowchart for the solution of optimization problem

3.1 INTRODUCTION

In case of an urban area where the load density is very high and the transmission distances are very small, the transmission loss could be neglected and the optimum strategy of generation could be based on the equal incremental production cost. If the energy is to be transported over relatively larger distances with low load density, the transmission losses, in some cases, may amount to about ...