Method and apparatus for transformer protection based on wavelet transform of flow rate signal
By collecting the flow velocity signal of insulating oil at the transformer connection pipe and performing wavelet transform, the problems of speed and accuracy in transformer fault detection are solved, enabling timely protection of the transformer and avoiding damage caused by internal pressure shocks.
CN115912262BActive Publication Date: 2026-07-17XIAN XIBIAN COMPONENTS CO LTD +2
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- XIAN XIBIAN COMPONENTS CO LTD
- Filing Date
- 2022-12-12
- Publication Date
- 2026-07-17
Smart Images
Figure CN115912262B_ABST
Abstract
The application provides a transformer protection method and device based on a flow rate signal wavelet transform, and the method comprises the following steps: collecting a flow rate signal of insulating oil at a connecting pipe of a transformer; detecting whether the flow rate at a current time in the flow rate signal is greater than or equal to a preset flow rate threshold value; if the flow rate at the current time is greater than or equal to the flow rate threshold value, performing wavelet transform on the flow rate signal, and detecting whether the transformer is faulty according to the wavelet transform value of the flow rate signal; and when the transformer fault is detected, controlling the transformer to be powered off. According to the flow rate signal of the insulating oil at the connecting pipe of the transformer, whether the transformer is faulty is detected, the detection process is not interfered by signal transmission in a power system of the transformer, meanwhile, harmonic interference is not caused to the power system of the transformer, and the power system operation is not affected.
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