A method of detecting backfeed and miswire events by a UPS system

By introducing a processor into the uninterruptible power supply system to detect and compare changes in the electrical parameters of input and output signals, the problem of low efficiency in detecting feedback and incorrect wiring events in the prior art is solved, and more efficient and accurate fault detection is achieved.

CN115166573BActive Publication Date: 2026-07-03SCHNEIDER ELECTRIC IT CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SCHNEIDER ELECTRIC IT CORP
Filing Date
2022-03-22
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing uninterruptible power supply (UPS) systems suffer from inefficiency and inaccuracy in detecting feedback and incorrect wiring events.

Method used

By introducing a processor into the uninterruptible power supply system, changes in the electrical parameters of the input and output signals are detected and compared to output an indication feedback detection signal. The parameters of the input and output AC power, including frequency, voltage, current and phase, are monitored, and the output parameters are adjusted to detect faults.

Benefits of technology

This improves the efficiency and accuracy of uninterruptible power supply systems in detecting feedback and incorrect wiring events, ensuring stable system operation.

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Abstract

A method for detecting feedback and faulty wiring events in a UPS system. A power supply and its usage method are provided, wherein the power supply includes an input configured to receive input AC power, an output configured to provide output AC power to a load, at least one power converter coupled to the input and configured to convert the input AC power to output AC power, and a controller coupled to the at least one power converter. The controller is configured to adjust at least one parameter of the output AC power provided by the at least one power converter, and in response to adjusting at least one parameter of the output AC power, detect at least one of the adjusted input AC power or the adjusted output AC power, and determine that a fault has occurred based on at least one of the adjusted input AC power or the adjusted output AC power.
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