GridGrade

GridGrade is a power-systems education app built on a real AC/DC power-flow solver — not a simplified toy, the same Newton-Raphson math used to operate real electrical grids. Load a scenario — from a hand-built 2-bus tutorial up to real published benchmark cases used to validate power-flow software since 1962 (IEEE 14-bus, IEEE 30-bus) and the classic 3-machine WSCC 9-bus system — and see it solved for real: every bus voltage and line flow is computed, not looked up. Run N-1 contingency screening (the industry-standard "what if this one line failed right now?" test) across every line at once. Then pick a line yourself and simulate it overloading or going down completely, and watch the real trip logic — not a scripted animation — decide what happens next, including whether it cascades into a second failure. Build your own grid from scratch in a freeform topology editor, using the exact…