Patent ID: 8467985
Filing Date: 2013-06-18
Classification: G06F

Abstract:
1. A method of automatically associating data measured by monitoring devices that monitor independent alternating current electrical grids, comprising: receiving, at a master synchronization device, first signal data from a first set of power monitoring devices that are monitoring current or voltage outputs for power consumption from a first electrical grid, the first signal data representing at least frequency variations in energy supplied by the first electrical grid and the values of current or voltage outputs from the first set of power monitoring devices, the frequency variations of the first signal data being measured by respective ones of the first monitoring devices for a predetermined number of occurrences; automatically synchronizing, in the master synchronization device, the frequency variations measured by each of the first monitoring devices and producing a first occurrence counter that counts a periodic occurrence in the synchronized frequency variations associated with the first monitoring devices; receiving, at the master synchronization device, second signal data from a second set of power monitoring devices that are monitoring current or voltage outputs for power consumption from a second electrical grid, the second electrical grid independent of the first electrical grid and producing alternating current signals that are electrically isolated from alternating current signals produced by the first electrical grid, the second signal data representing at least frequency variations in energy produced by the second electrical grid and the values of current or voltage from the second set of power monitoring devices, the frequency variations of the second signal data being measured by respective ones of the second monitoring devices for a predetermined number of occurrences at a time coincident with a time that the first set of monitoring devices measure the frequency variations in the energy supplied by the first electrical grid; automatically synchronizing, in the master synchronization device, the frequency variations measured by each of the second monitoring devices and producing a second occurrence counter that counts a periodic occurrence in the synchronized frequency variations associated with the second monitoring devices; automatically comparing, in the master synchronization device, a first count of the first occurrence counter with a first count of the second occurrence counter, wherein the first count of the first occurrence counter and the first count of the second occurrence counter temporally correspond to an electrical event in the first electrical grid and the second electrical grid; and determining a relationship between the first signal data and the second signal data by associating the first count of the first occurrence counter and the first count of the second occurrence counter to collect the first and second signal data and the first and second occurrence counters for analysis of the first and second signal data independent of changing power supplied by the first and second electrical grids.