Curtailment e armazenamento da energia: efeitos no fluxo de potência em região de alta geração renovável e carga atípica

Abstract

The Brazilian electricity grid is primarily comprised of renewable energy sources such as solar and wind. However, the inclusion of these sources presents new challenges for electricity sector players. While wind and solar power grew exponentially, the system's transmission lines and load capacity did not grow at the same pace. As a result, curtailment measures have become increasingly common to ensure generation load balance. These challenges highlight the need to introduce new technologies to help overcome these limitations. Thus, Energy Storage Systems (ESS) present an effective solution, as they can store and inject energy at desirable times. In this context, this paper sought to present a case study of the implications of incorporating these technologies into an electricity grid inspired by the Brazilian Electric System (SEB), focusing on the Ourolândia 230 kV substation located in the state of Bahia. In the methodological context, the requirements of the Grid Procedures, storage system modeling, and simulation strategies were developed using ANAREDE. The main results indicate that, for all baseline simulation scenarios, some system buses violated voltage limits, requiring the insertion of voltage control elements. Regarding the insertion of energy storage systems, no operational limits were violated. Furthermore, their application in the heavy-load scenario contributed significantly in the supporting at the local load.