A method and apparatus for monitoring and protecting an electrical device

By collecting real-time current and voltage data of electrical equipment, generating current and voltage waveform curves and total harmonic distortion, identifying power quality, voltage and power anomalies, and issuing warnings or prompts, this solves the problem of existing technologies being unable to provide early feedback on abnormal states of electrical equipment. It enables early identification and warning of various abnormal states of electrical equipment, improving the durability and safety of electrical equipment.

CN120928069BActive Publication Date: 2026-09-08GREE ELECTRIC APPLIANCE INC OF ZHUHAI
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Patent Information

Application Number
CN202510947810.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-07-10
Publication Date
2026-09-08
Estimated Expiration
2045-07-10

AI Technical Summary

Technical Problem

Existing technologies cannot provide early feedback on abnormal states of electrical equipment, cannot identify multiple abnormal states, and cannot provide early warnings or records, resulting in electrical safety hazards not being identified and addressed in a timely manner.

Method used

By collecting real-time current and voltage data from electrical equipment, generating current and voltage waveform curves, calculating total harmonic distortion and power curves, identifying power quality, voltage, and power anomalies, issuing warnings or alerts, and setting up processing units, acquisition units, storage units, and communication units for real-time monitoring and early warning.

Benefits of technology

It enables early identification and warning of various abnormal states of electrical equipment, improves the durability and safety of electrical equipment, optimizes equipment operation status, and enhances operation and maintenance efficiency and safety.

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Abstract

The application discloses a kind of electric equipment monitoring protection method and device, protection method includes: acquisition electric equipment current voltage data, current, voltage waveform curve is generated based on current voltage data and current, voltage total harmonic distortion is calculated, current power and current time slope are calculated based on current voltage data;Current, voltage harmonic deviation value is calculated based on current, voltage total harmonic distortion, set current, voltage standard total harmonic distortion calculation obtains, and according to current, voltage harmonic deviation value, power quality anomaly is identified and warning or prompt is sent;The size relationship of voltage waveform curve and the set fundamental wave rated signal of preset proportion range is identified, and voltage anomaly and voltage anomaly early warning or line fault early warning are sent;The deviation value between current power and the normal power corresponding to the current state of electric equipment is calculated, and power anomaly is identified in combination with current time slope and warning is sent.The application realizes the identification warning for the multiple abnormal states of electric equipment.
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