Aplicação de técnicas de otimização em sistemas de potência com geração de energia intermitente

Abstract

The challenges related to the high penetration of wind energy in electrical power systems (EPS) involve operational issues due to the variability of wind, increasing uncertainties in the available generation to meet demand. To address these issues, three methodologies have been proposed. One of them focuses on optimizing reinforcements in the transmission system to maximize the injection of wind power and, thus, the use of renewable sources, while minimizing the total investment cost. Another approach considers quantifying the flexibility of non-wind generation needed to ensure the system reliability by determining the amount of reserve and reinforcements in transmission lines. For that, it is proposed the application of the k-means algorithm to obtain wind generation scenarios, in addition to a model based on Optimal Power Flow (OPF) and Lagrange multipliers. Lastly, the third methodology proposes the use of electrical energy storage through batteries to reduce the impacts of wind curtailment, that is, curtailment in the wind power, with an hourly analysis over a one-month period, considering wind generation and demand scenarios. The IEEE 24-bus and 118-bus test systems are used to demonstrate the application of the proposed methodologies, and the obtained results are promissing to contribute to the maximum utilization of wind energy in EPS.