Patent ID: 9053020
Filing Date: 2015-06-09
Classification: G06F,H02H,H02J

Abstract:
1. A method for automatic protection coordination in a power system network that includes one or more power sources and multiple fault protection devices, wherein a plurality of the fault protection devices are remotely controllable and have multiple preconfigured settings, the method comprising: identifying radial source-to-load paths and fault protection devices in said source-to-load paths, for a portion of the power system network to be coordinated, based on stored topology data for said portion; retrieving protection device settings data for identified fault protection devices, including the multiple preconfigured settings for remotely controllable fault protection devices in said portion of the power system network; calculating predicted fault currents for each of a plurality of possible electrical faults in said portion of the power system network, based on the stored topology data; performing a selectivity check for each pair of fault protection devices that are adjacent to one another in an identified radial source-to-load path, for each of one or more of the predicted fault currents, taking into account multiple preconfigured settings for remotely controllable fault protection devices; selecting a combination of settings for remotely controllable fault protection devices, based on the selectivity check, to minimize selectivity violations among the pairs; sending a change-setting command to remotely controllable fault protection devices for which settings have changed, based on the selected combination of settings.