Influence of Transformation Capacity Expansion of a Substation on the Distribution Network Resilience: A Study of a Substation in the Metropolitan Region of Recife-Brazil

In face of the climate changes caused by global warming, the energy transition became a relevant aspect in the energetic planning to be less dependent on fossil fuels. The Brazilian energy mix is already predominantly renewable, and until the end of the decade more investments in renewable energies expansion are expected. So, the electrical system must be structured to operate safely, efficiently, and reliably, to ensure the continuity of the electrical and energy supply. For this, the expansion and implementation of substations is essential since they contain the equipment responsible for the continuity of the power flow and voltage transformation that will be distributed. Thus, addressing these requirements in the system's planning, the concept of resilience is highly appropriate to tackle them. Specifically dealing with substations, which are responsible for the transformation, protection, control, and manoeuvre of electrical energy supply until the final consumer, is a way of mitigating problems related to the supply discontinuity, making necessary to carry out studies in order to investigate the resilience of the substation and the power transmission network to which it is inserted. In this context, a metric to assess the reliability in this context is proposed and is applied in a real substation considering disruption scenarios.

Keywords: Resilience, Energy transition, Reliability, Substations.

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