What is wide-area protection and monitoring in modern grids?

Wide-area protection uses synchronized phasor measurements (PMUs) for real-time visibility across large areas. PMUs provide GPS-synchronized voltage and current phasors at 30-60 samples/second. Applications include: wide-area situational awareness, real-time stability monitoring, adaptive protection, and special protection schemes. WAMPAC (Wide Area Monitoring, Protection, and Control) enables coordinated response to disturbances, detecting oscillations and angular separation that local measurements cannot see. Communication latency and reliability are critical design factors.