Method for testing transformer oil paper insulation frequency domain dielectric response and device thereof

Abstract

The invention discloses a method for testing transformer oil paper insulation frequency domain dielectric response and a device thereof. The device comprises a variable frequency signal generator (1), a signal conditioning module (3), a signal acquisition module (8) and a processing module (11). The signal output end of the variable frequency signal generator (1) is connected to the input end of a tested transformer (2). The output end of the tested transformer (2) is connected to the receiving end of the signal conditioning module (3) and the receiving end of the signal acquisition module (8). The method and the device have the advantages that the operation is simple, the measurement precision is high, the anti-interference ability is strong, the measurement result information is rich, the measurement of transformer oil paper insulation frequency domain dielectric response can be completed in a complex field environment, the cost is low, the method and the device can be widely popularized and applied in a domestic power system, the transformer oil paper insulation aging state assessment and fault diagnosis are improved further, and the method and the device have an important meaning to the reliable operation of the power system.

Description

technical field [0001] The invention relates to a dielectric response testing device and method, in particular to a method and device for testing transformer oil-paper insulation frequency-domain dielectric response. Background technique [0002] Oil-immersed power transformer is the core equipment of energy conversion and transmission in the power system, its safe and reliable operation is of decisive significance for the stable supply of power. Most power transformers use oil-paper insulation as their internal main insulation system. In actual operation, the oil-paper insulation system gradually ages due to electrical, thermal, chemical, mechanical and other stresses. Serious aging may cause transformer failure or even affect power supply for the entire grid. For power transformers in the early aging stage, effective maintenance measures need to be taken to prolong their service life; for power transformers in the mid-aging stage, timely and effective maintenance measures...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings and deficiencies of the above-mentioned prior art, provide a method and device for testing the frequency-domain dielectric response of transformer oil-paper insulation, and solve the existing transformer oil-paper insulation test method, wherein the recovery voltage method can only test oil-paper insulation The overall aging state of the insulation has the defect of incomplete testing, while the depolarization current method is susceptible to external interference, making the test inaccurate.

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