Abstract—Throughout today’s unbundled power systems, it is assumed that the transmission system is a natural monopoly, and therefore, it should be regulated. To compensate for the revenue requirements of the owners of the transmission system and encourage its future expansion, transmission pricing schemes should be designed fairly. Also the schemes must aim to achieve the objective of maintaining system security by encouraging proper operation and maintenance of existing and investment in new facilities. In this paper, based on a simple economic principle, a novel method for allocation of the fixed cost of the transmission system to agents using these facilities is developed. This new method introduces the concept of critical capacity of a line and considers congestion in the transmission system to allocate the share of the transmission system revenue requirement that each agent has to provide. Identifying and charging the agents who cause congestion is very important as it sends the correct economic signal to transmission network users. This is a novel feature of this method, thus making it most suitable for systems where congestion does occur. We also point out briefly the reliability concerns of the new method. A simple eight-bus network representative of the PJM-ISO system together with its market pricing mechanism is used as a competitive power system to illustrate the main features of the proposed method. market. On the other hand, unbundling of the different sectors of the power system from transmission has posed questions and created many worries regarding the availability and adequacy of the revenue for the transmission industry, in order to operate properly, maintain, and expand [1]–[3]. As transmission of power in one part of the system will affect all other parts of the system, it should be priced not only to provide for the revenue requirement of the transmission system but also to increase the efficiency of the electricity market. In transmission pricing, transmission constraints have to be considered; if not, efficiency will be compromised, as these constraints would prevent the cheapest generator from being accessible to the load. Moreover, considering the transmission constraints and congestion pricing will provide the needed incentive for generation and, to some extent, load, location, and transmission expansion. This will provide system efficiency and will be compatible with a proper pricing mechanism for transmission system services pricing [4].
کلید واژگان :—Benefit factor method, congestion, fixed transmission right, transmission fixed cost.
ارزش ریالی : 600000 ریال
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