The largest machine people have built, run on the page: alternating current, three phases and per unit; transformers, generators, motors, lines and the power electronics that join wind, sun and batteries; how power flows through a network, how frequency and voltage are held, how faults are found and cleared, how people are kept safe, how the grid is dispatched, priced and planned, and how it is changing. Open breakers on Curio Island, trip generators, place faults and clear markets — every number computed by the page.
Every curve and number on these pages is computed by the page or cited with its source; your progress stays in this browser. Mains and high voltage kill: nothing here asks you to open or touch anything on mains. The networks are synthetic or published test systems, and the course gives no engineering, legal, medical or investment advice. Not affiliated with or endorsed by any organisation, utility, manufacturer, publisher or author mentioned here.