The document discusses smart grids and microgrids. A smart grid uses smart meters, renewable energy, and energy efficiency to reliably and flexibly distribute electricity. Key features include load balancing, demand response, and enabling energy markets. Components include security requirements to protect against attacks. Microgrids are localized groups of electricity sources and loads that can disconnect from the main grid and operate autonomously. Types include campus, remote off-grid, military, and commercial/industrial microgrids. Components include local generation, consumption, storage, and a common coupling point. Both smart grids and microgrids require security measures to protect against potential attacks.