Obtaining real time Thevenin equivalent circuits from local power busses

Advantages

• Rapid measurement of power grid state
• Single time point measurement
• Allows response to fast voltage or phase instabilities

Technology Details

This technology provides a novel method to accurately estimate power grid stability by measuring in real time, with a single time-point, instabilities and drift at a power grid node, such as a power substation.

The algorithm allows an estimation of the Thevenin equivalent of the grid as seen from local substation busses in a power station. Voltage stability, angle stability, system islanding and other predictors of system behavior can be estimated using this technique.

The method can be implemented with current transformers and voltage transformers typically present at power substations or newer phase measuring units.

Applications:
Real-time Voltage Stability Assessment, Voltage Stability Relays, Self-healing networks, Optimum Load Management in distributed systems, Islanding Detection