A Bulk-Power System is the high-voltage generation and transmission network that keeps electric power reliable at large scale. It is the part of the grid that moves electricity between plants, substations, and major load centers, rather than the lower-voltage local distribution network.
In cyber security, BPS assets matter because a disruption can affect wide areas and create cascading failures. Threats are not limited to direct hacking of control networks; they can also come through firmware, vendor remote access, software updates, spare parts, and maintenance channels. Defenders focus on asset visibility, authenticated updates, strong access control, segmentation, redundancy, and supply-chain assurance. In practice, BPS security is about protecting both operations and trust in the equipment over its full lifecycle.