Power Engineering Primer
Substations and Transmission Lines 101 — Reading High Voltage, Protection Relays, and HVDC Through Grid Behavior
Why is a power plant's electricity stepped up to hundreds of kV and then stepped down in stages at substations? This piece diagrams the roles of transformers, circuit breakers, busbars, protection relays, and transmission lines — the equations behind loss, power angle, and insulation coordination, alongside today's equipment, digital substations, and HVDC research — as a single system.