Uma metodologia de planejamento da expansÃo da transmissÃo baseada em trade-off e indicador de mÃrito econÃmico




Since the last ten years the electrical industry have been experiencing an intensive restructuring process worldwide. This process varies from country to country in accordance with their characteristics. However a common objective has been identified: the increase in terms of efficiency through the introduction of competition in the energy production and trading thus leading to moderate tariffs to the consumers. A basic step towards this goal is the guarantee the open access of the transmission system to third parties, i.e., the transmission system is considered as a natural monopoly and its costs are regulated. Due to the high load growth rates, the expansion of the generation and transmission systems becomes a key factor in this new environment. For this reason, a new entity was conceived, the Expansion Planning Coordinating Council of the Electric Power Sector â CCPE, which is in charge of the indicative generating planning and determinative transmission planning. In the case of the transmission system, it is important to highlight that the planning activity has and additional objective: to allow the competition in the generation and trading segments inside of a de-centralized investment decision making process. Therefore the degree of importance and complexity of the transmission planning has been increased in the new electrical industry. Besides describing the concepts related to the transmission planning problem in the new framework, this thesis also describes an approach to its solution. The proposed methodology takes into account the distinct decision making horizons and degrees of system representation as well as the involved uncertainties. It comprises the following major steps: (a) establishment of the reference expansion configuration; (b) development of alternative expansion configurations through delays in the circuit implementations; (c) ranking of expansion configurations from the definition of economic indices of merit; (d) identification of the decision set by eliminating the dominated expansion configurations; (e) selection of the optimal set of configurations through trade-off (benefit/ cost) analysis, where the benefit is associated to the decrease of the equivalent expected energy not supplied of the configuration. The proposed approach is illustrated through a detailed case study with a configuration of a realistic network, the Eastern area of CHESF system. The results has shown that the methodology is very adequate to this system and has a great potential to be applied to other systems


confiabilidade e otimizaÃÃo de sistemas de transmissÃo engenharia elÃtrica â sistemas de potÃncia engenharia eletrica planejamento da expansÃo de sistemas de transmissÃo

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