Method of utilizing vibration waveform for detecting state of transformer winding
A technology of transformer windings and vibration waveforms, applied in transformer testing, measuring electrical variables, instruments, etc., can solve problems such as system operation impact, achieve timely maintenance or replacement, and avoid sudden short-circuit effects
Inactive Publication Date: 2011-01-05
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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At the same time, these two methods are offline detection methods, that is, the transformer needs to be ou
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[0036] On November 17, 2006, Shenyang Hushitai National Transformer Quality Inspection Center conducted a short-circuit impact test on a 10kV distribution transformer of Shanghai Electric Power Company.
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The invention relates to a method of utilizing the vibration waveform for detecting the state of the transformer winding. A transformer winding is viewed as a mechanical system; and if the winding is loosened or deformed, the mechanical characteristics of the winding changes, thus the corresponding mechanical characteristics of the transformer winding under the action of the impulse current are detected and the loosening and deforming condition of the transformer winding can be detected sensitively.
Description
technical field [0001] The invention relates to a method for detecting the state of a transformer winding by using a vibration waveform, in particular to a method for detecting the state of a transformer winding by using a vibration waveform excited by a short-circuit surge current of a transformer. Background technique [0002] The transformer is one of the most important equipment in the power system, and its operation stability has a great influence on the safety of the power system. With the increasing capacity of my country's power grid, the short-circuit capacity is also increasing. The huge electromagnetic force generated by the surge current formed by the short-circuit of the transformer outlet poses a serious threat to the mechanical strength and dynamic stability of the transformer winding. At present, the operating environment of substation equipment and lines is not optimistic. The deformation of transformer winding caused by external short circuit is a relativel...
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Login to view more IPC IPC(8): G01R31/06G01H17/00
CPCG01R31/027G01R31/62
Inventor 姜益民金之俭朱子述饶柱石傅坚
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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