Abstract
The shift from regulated to restructured power system results in an increased competition among the electricity market. In restructured power system, the separation of transmission services from generation and distribution makes it necessary to find the contribution of power from individual generator to individual load. The power flow tracing method is used to obtain the generator power output to a particular load. The reactive power has to be maintained in order to sustain the voltage level throughout the system for reliable and secure operation. Hence the reactive power cost allocation has become imperative in the power system. In this paper, the tracing method is integrated with the optimal reactive power dispatch problem to trace the generator minimal reactive power for sustaining the real power transaction and enhancing the system security by meeting the demand. The Differential Evolution is used for optimal reactive power dispatch. The cost allocation to the generators for the reactive power service based on the opportunity cost method is obtained for 62 Bus Indian Utility Systems.
Highlights
The power industry in the world is currently moving towards restructuring for providing economical choice and quality service to the consumers
The reactive power pricing method is analyzed in detail by considering the 62 bus Indian Utility System (IUS)
The objective of optimal reactive power dispatch (ORPD) problem is the minimization of real power losses as shown in (5)
Summary
The power industry in the world is currently moving towards restructuring for providing economical choice and quality service to the consumers. The optimal reactive power dispatch (ORPD) along with the power flow tracing method is introduced to determine the optimal reactive power contribution of the generator This method can assess a minimal dispatch of generator’s reactive power that will be required to move the real power and pricing the generator’s optimal reactive power using opportunity cost method. Mala De et al have calculated the generator reactive power price using cost functions and a power flow tracing method [6]. They have not considered the opportunity cost of the generator.
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