Implementation of Zero Trust Architecture for Cybersecurity in Distributed Energy Resources (DERs): A Systematic Review

The high growth rate of the distributed energy resources (DERs) comprising solar photovoltaics, wind, and battery storage systems (BESS) has essentially altered the classically centralized power grid into a more diverse classification of distributed assets. It has brought with it some unprecedented computer security challenges that cannot be solved in a proper manner via the conventions of the perimeter-based computer security. Zero Trust Architecture (ZTA) is another shift in paradigm, or a paradigmatic shift in cybersecurity terms, as there is an implicit trust provided by location in the network shifting to explicit verification of each transaction and each access request. The study proposes a holistic system of realizing Zero Trust rules specifically adapted to the distributed energy resources setting that considers policy-based access control methods, identity credentialing procedures, micro-segmentation approach, and constant surveillance aspects. This research paper addresses the implementation of Zero Trust concepts with the existing SCADA installations, compliance models such as NIST 800-207 and ISO 27001, the field implementation of BESS and its associated Zero Trust concepts. By acting upon the results of the systematic study of existing vulnerabilities of cybersecurity in the DER ecosystem and the assessment of the Zero Trust implementation plans, this study proves that Zero Trust Architecture can efficiently improve the security status of distributed energy infrastructure without reducing its operating efficiency and adhering to existing regulatory frameworks. The suggested structure will resolve the most significant security gaps in the distributed energy systems and introduce flexible and adaptive security policies that can be changed with the dynamism of contemporary energy infrastructure.