On-line ultrahigh-voltage line power transformer test method

A technology of power transformers and test methods, which is applied in the direction of measuring electrical variables, instruments, and measuring electricity, can solve problems such as unstable instrument indications, large errors in measurement results, and unreadable readings, so as to achieve true and credible diagnostic results and reduce Measuring errors and preventing static electricity from beating people
CN102735959AInactive Publication Date: 2012-10-17MAINTENANCE BRANCH STATE GRID LIAONING ELECTRIC POWER +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
MAINTENANCE BRANCH STATE GRID LIAONING ELECTRIC POWER
Publication Date
2012-10-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

An on-line ultrahigh-voltage line power transformer test method includes the following specific steps: measuring off-line 'raw data' and on-line 'basic data'; measuring the insulation resistance R of windings; analyzing the insulation resistance R of the windings; measuring the active current I Rho, reactive current I Kappa and dielectric dissipation factor tan Delta of each winding; analyzing the dielectric dissipation factor tan Delta; measuring the capacitance C of capacitance type bushings; analyzing the capacitance C of the capacitance type bushings; measuring the leakage current I of the windings; and analyzing the leakage current I of the windings. The on-line ultrahigh-voltage line power transformer test method has the advantages that the measurement result is accurate, the safety of operators can be guaranteed, equipment injuries can be prevented, and safety is good.
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Description

technical field

[0001] The invention relates to a method for conducting preventive tests on power transformers, in particular to a test method for power transformers with ultra-high voltage lines without disconnecting the wires. Background technique

[0002] In order to discover the hidden dangers of power transmission and transformation equipment in operation and prevent accidents or equipment damage, it is necessary to conduct preventive tests on power transmission and transformation equipment. At present, the commonly used preventive test method for transformers is to remove the connections on each side of the transformer, and then perform routine measurements on various data of the transformer. The process of disassembling and assembling the leads is dangerous, labor-intensive and time-consuming, and the equipment is easily damaged. In order to avoid the occurrence of the above phenomenon, CN101354418 B discloses a test method for a power transformer without disconnecti...

Claims

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