SENSITIVITY BASED METHOD FOR TRANSMISSION PRICING UNDER OPEN ACCESS

Abstract

In this dissertation work sensitivity based approach is demonstrated for transmission cost allocation under open access environment. The power flow sensitivities used for this purpose are derived from full AC Newton-Raphson power flow. It has been found in literature that the individual participant's impact on the transmission power flow is determined by the power flow sensitivities from a set of decoupled or DC power flow equations. However, due to nonlinear characteristics of electrical systems, DC power flow based approach provides only a rough estimated solution. The present work intends to calculate more accurate individual impact signals for transmission cost allocation and compared with MW-mile method derived from repeated application of AC load flow solution. To demonstrate the efficient performance, the method has been tested with IEEE 9- bus and IEEE30- bus test system and the obtained results have been compared with the conventional MW-mile method.