Patent ID: 7582986

Claim:
A compensated inverse-time undervoltage load shedding system for shedding a load in an electrical power system, the compensated inverse-time undervoltage load shedding system comprising: a compensation element for calculating a compensated value from an impedance phasor value; and an inverse-time undervoltage element in communicating relation with said compensation element, said inverse-time undervoltage element determining a load shedding signal based on a comparison of the compensated value with a predetermined threshold, wherein the load of the electrical power system is shed based on the load shedding signal, wherein the impedance phasor value is selected to prevent the load from shedding for a measured current of the electrical power system when a measured current value of the measured current is smaller than a selected current value and when the measured current is substantially in phase with a measured voltage of the electrical power system.