Generator Protection Device for Power Swing Detection

The patent implements dynamic safety factor limits that automatically adjust based on real-time system conditions. The protection device calculates safety factors using current terminal voltage and swing center voltage, comparing them against dynamically determined thresholds rather than fixed preliminary settings. This allows the relay to adapt to changing system configurations and operational dynamics during both implementation and operational phases.

The protection device performs self-adjustment by continuously calculating safety factors from measured voltages and comparing them against computed limits. The system serves itself by automatically adapting its detection criteria without requiring external reconfiguration or extensive stability studies, enabling reliable detection across varying system conditions.

The patent extracts the essential function of swing center voltage estimation from the complex communication network infrastructure and implements it locally at the generator terminal using measured terminal voltage and calculated safety factors. This eliminates the need for high-speed communication networks while maintaining the ability to detect unstable power swings through local measurements and computations.

The protection device uses inexpensive local voltage measurements and computational algorithms instead of expensive communication network infrastructure. The solution replaces costly, complex communication systems with simple, affordable local sensing and processing that achieves the same detection objective without requiring external data transmission.

The patent replaces static preliminary settings with dynamic safety factor calculations that continuously adapt to current system conditions. Instead of relying on fixed values determined during extensive stability studies, the protection device computes safety factors in real-time using measured terminal voltage and swing center voltage, enabling immediate response to system configuration changes without requiring re-studies.

The patent establishes the framework for dynamic adaptation in advance through the safety factor calculation methodology, but the actual adaptation occurs in real-time as system conditions change. This preliminary establishment of the dynamic calculation approach eliminates the need for repeated stability studies when system configuration changes occur during operational phase.