WIDE AREA FAULT DETECTION METHOD USING PMU DATA

摘要

The embodiments herein are directed to monitoring in real time, power system data so as to provide insights into global operation of a power grid. Such a scheme disclosed herein utilizes rules, which are created by analyzing PMU measurement data, in order to detect the fault location (bus and line) and fault type. Three common types of faults in a power grid, single-line-to-ground (SLG), line-to-line (LL), and three phase faults, can be detected using the methods herein.

主权项

1. A method for wide-area real time line fault detection in a power grid system; comprising:
(a) using a measurement device to measure one or more current phasors and one or more voltage phasors at a monitored bus of a load center; and (b) using a logic processor device to:
(i) acquire the measured one or more current and voltage phasors obtained by the measurement device;(ii) identify an event as one or more faulted buses in the power system via calculating a maximum three phase total average voltage deviation (ΔVt), wherein a magnitude of the one or more measured voltage phasors is utilized to calculate the maximum three phase total average voltage deviation (ΔVt);(iii) determine the event as one or more fault types using at least one methodology selected from: a first method that uses the magnitude of the one or more voltage phasors and a second method that uses both the magnitude and a phase angle of the measured one or more voltage phasors, wherein the first method and the second method enables determination of the one or more fault types with at least one fault type selected from: single line-to-ground faults (SLG), line-to-line faults (LL), and three-phase faults; and(iv) detect the one or more faulted lines using the magnitude of positive sequences of the one or more current phasors as the parameter.