Power quality detector
AssigneeSchneider Electric It Corporation
InventorKristian Budde
Life of this patent
Estimating the term…
Abstract
Systems and methods of controlling an uninterruptible power supply are provided. The uninterruptible power supply includes an input configured to receive input power, one or more sensors configured to monitor one or more parameters related to the input power, an output, a power conversion circuit coupled with the input and the output, a bypass switch configured to couple the input to the output in a bypass mode of operation, and a controller coupled with the power conversion circuit, and the bypass switch. The controller is configured to receive, from the one or more sensors, values for the one or more parameters, filter the values to determine one or more quality metrics, calculate, based on the quality metrics, a quality measure of the input power, and control the bypass switch based on the quality measure.
Claims18
An uninterruptible power supply, comprising:
- an input configured to receive input power;
- one or more sensors configured to monitor one or more parameters related to the input power;
- an output;
- a power conversion circuit coupled with the input and the output;
- a bypass switch configured to couple the input to the output in a bypass mode of operation, and to decouple the input from the output in a double conversion mode of operation and in a backup mode of operation;
- and
- a controller coupled with the power conversion circuit and the bypass switch, the controller configured to:
- receive, from the one or more sensors, values for a plurality of parameters;
- filter the values to determine a plurality of quality metrics;
- calculate, based on the quality metrics, a quality measure of the input power and compare the quality measure with a first threshold;
- and
- control the bypass switch to switch from bypass mode of operation decoupling the input from the output, and control the power conversion circuit to operate in double conversion mode of operation based on the comparison of the quality measure with the first threshold.
A method of distributing power using an uninterruptible power supply, the method comprising:
- receiving, at an input, an input power;
- controlling a bypass switch to a closed position to provide the input power to an output through the bypass switch to operate the uninterruptible power supply in a bypass mode of operation;
- monitoring a plurality of parameters related to the input power;
- filtering values for the plurality of parameters to determine a plurality of quality metrics;
- calculating, based on the quality metrics, a quality measure of the input power;
- comparing the quality measure with a first threshold;
- and
- based on the comparison of the quality measure with the first threshold switching the bypass switch to an open position to operate the uninterruptible power supply in a double conversion mode of operation.
Dependencies are inferred from the claim text.