هزینه نهایی کفایت سیستم انتقال برای قیمت گذاری لحظه ای

A model of marginal adequacy costs is developed in order to reflect the influence that any nodal load has on system static security. An adequacy cost function is defined, making use of the load that must be theoretically withdrawn at each node in order to re-establish power flows on transmission elements, after any static contingency of a predefined set occurs. A minimal adequacy transport system is defined as a primary system used as reference for adequacy calculation purposes. Inclusion of adequacy cost function leads to co-ordination equations, which permit identification of marginal costs that are suitable for partial transmission equipment investment recovery. Results of simulations on the reliability test system (RTS) show important costs' components, which are variable in time and space, thus being appropriate for spot pricing schemes. It is verified that a significant part of transmission investment can be recovered by means of the marginal costs of adequacy.