Eliane Valenca De Lorenci

TL;DR: In this paper, the stability and reliability of voltage in a power system with distributed generation is analyzed using simulation techniques, and reliability theory is also considered in the proposed voltage collapse analysis methodology.

Abstract: This paper proposes a novel energy based technique called the Robustness Area (RA) technique that measures power system robustness levels, as a helper for planning Power System Restorations (PSRs). The motivation is on account of the latest blackouts in Brazil, where the local Independent System Operator (ISO) encountered difficulties related to circuit disconnections during the restoration. The technique identifies vulnerable and robust buses, pointing out system areas that should be firstly reinforced during PSR, in order to enhance system stability. A Brazilian power system restoration area is used to compare the guidelines adopted by the ISO with a more suitable new plan indicated by the RA tool. Active power and reactive power load margin and standing phase angle show the method efficiency as a result of a well balanced system configuration, enhancing the restoration performance. Time domain simulations for loop closures and severe events also show the positive impact that the proposed tool brings to PSRs.

TL;DR: In this article , the authors analyzed the long-term consequences of a new law for regulating on-grid renewable distributed generation in Brazil, which was mainly based on three models/techniques, i.e., the optimized tariff model, the Bass diffusion model, and an environmental impact analysis technique.

TL;DR: The results show the voltage stability assessment’s effectiveness using the energy function and the improvement of the system stability condition when allocating the intermittent sources in the microgrid area indicated by the auxiliary function technique.