Power Grid & Plant Cybersecurity: OT, ICS, SCADA, DER, BESS, Relays, Remote Access and Cyber Resilience for Modern Electricity Infrastructure

Two Ukrainian grids went dark to code. In 2025 the target became thirty small solar and wind sites at once.The grid is the most consequential machine on earth, and it is being rebuilt in software - distributed, inverter-based and internet-adjacent - faster than it is being secured. Ukraine proved code can open breakers; a 2025 campaign against Poland showed the next front is thousands of small, loosely governed energy sites. This is the grid-hardened field manual for that reality.This field manual covers how to defend: - Generation, control centres and EMS- Substations, protective relays and IEDs- Transmission, distribution automation, DER and battery storage- Engineering workstations, protocols and loss-of-view detection- Black start, degraded operations, NERC CIP alignment and the modernisation roadmapWho it's for: Utility and generation security teams, protection and control engineers, and energy-sector CISOs.Every chapter opens on a real, dated, documented incident and closes with a one-line Boardroom Intelligence takeaway a director can act on. A full Source-Notes appendix lets every claim be checked."Keep the lights on when the network cannot be trusted."About the author Professor Kai London (CISSP, CISM) is an internationally recognised cybersecurity executive, board advisor and author with 25+ years defending banking, aviation, defence, government and critical national infrastructure.This single, exhaustively engineered reference is built to replace an entire shelf of vendor manuals and generic energy-sector primers - every chapter, checklist, and relay-protection template is designed for immediate use by working power grid, DER, and BESS security teams, making it the highest-value, most complete investment a utility or security program can make in modern electricity infrastructure resilience.