Method and apparatus for monitoring power quality in an electric power distribution system
First Claim
Patent Images
1. A method of monitoring power quality in an electric power distribution system comprising:
- repetitively determining values of a plurality of selected parameters of the electric power distribution system;
generating a composite power quality indicator from the values of the plurality of selected parameters; and
generating an output representing the composite power quality indicator.
2 Assignments
0 Petitions
Accused Products
Abstract
A composite power quality indication generated from user weighted statistical contributions of selected system parameters provides an overall indication of power quality in an electric power distribution system. The user defined weightings are maintained over time by continually updating sensitivities that normalize the component contributions to the composite power quality indication. The current composite power quality indication is displayed in relation to its long-term mean and to dynamic thresholds determined as multiples of the standard deviation of the long-term mean.
70 Citations
20 Claims
-
1. A method of monitoring power quality in an electric power distribution system comprising:
-
repetitively determining values of a plurality of selected parameters of the electric power distribution system;
generating a composite power quality indicator from the values of the plurality of selected parameters; and
generating an output representing the composite power quality indicator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A power quality monitor for an electric power distribution system comprising:
-
sensors for sensing currents and voltages in the electric power distribution system;
processing means comprising means for repetitively determining values of selected parameters from the currents and voltages and for statistically generating a composite power quality indicator from the values of the selected parameters; and
output means providing a representation of the composite power quality indicator. - View Dependent Claims (15, 16, 17, 18, 19, 20)
-
Specification