Power Systems Engineering
PE-level depth on reactive power, SCADA, protection relaying, and solar plant interconnect. Written by engineers, for engineers.
A control engineer's breakdown — Q theory, dq-axis inverter control, closed-loop PI design, protection interactions, pseudocode and real commissioning failure modes. 10 MW AC / 38.4 kV POI reference plant.
Read full article →How Q injection shifts apparent impedance on the R-X plane. Zone reach calculations with plant P-Q operating range.
Category A vs B reactive capability. Voltage and frequency ride-through curves. Firmware checks before interconnection filing.
Standard AI/BI/AO/BO points, RTAC tag mapping, scaling and deadband. Common errors that cause false alarms at the control room.
Slope characteristics, harmonic restraint, inrush blocking. How capacitor bank switching interacts with 87T in the field.
Passive vs active detection. The load-matching scenario that defeats passive methods. ROCOF and vector shift settings.