Distribution transformer fault diagnosis device and method based on multi-index comprehensive evaluation

Abstract

A distribution transformer fault diagnosis device based on multi-index comprehensive evaluation includes a sound acquisition unit, an oil temperature acquisition unit, a unit for analyzing gas dissolved in oil of a transformer, a fault diagnosis unit and a battery power supply module; the fault diagnosis unit includes an FM receiver module (7) whose output end is connected with an AD converter (8) and an ARM single-chip microcomputer (9) in sequence; and the sound acquisition unit includes a fixed support (2) on which a strong magnet (1) and a pickup head (3) are fixed, the pickup head is connected with a pickup (4), an output end of the pickup is connected with a signal conditioning circuit (5) and an FM transmitter module (6) in sequence, and the FM transmitter module is connected with the FM receiver module through FM electromagnetic waves. The distribution transformer fault diagnosis device based on multi-index comprehensive evaluation can satisfy requirements for performing fault detection on a distribution transformer in operation on site and judging the fault type, does not need a power supply to be provided on site, and is convenient to carry, low in signal acquisition and transmission cost, fast in diagnosis speed and convenient to use.

Description

technical field [0001] The invention relates to a transformer fault diagnosis device, in particular to a distribution transformer fault diagnosis device based on multi-index comprehensive evaluation, which is suitable for distribution transformers in operation. The invention also relates to a distribution transformer fault diagnosis method based on multi-indicator comprehensive evaluation using the above method. technical background [0002] Distribution transformers are power transmission equipment that convert high-voltage power into low-voltage power for direct use by users in the power system, and play a vital role in ensuring industrial production and people's lives. The safe and reliable operation of distribution transformers depends to a large extent on the level of power system operation and maintenance. In accordance with the requirements of DL / T1102-2009 "Operation Regulations for Distribution Transformers", regular inspections of distribution transformers must be...

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Problems solved by technology

It must cooperate with the transformer manufacturer to install the inside of the transformer before leaving the factory, which will greatly increase the detection cost, and it cannot be installed or the installation cost is high for the distribution transformer that has been put into operation; and it uses wired communication, using Ethernet, RS485 Or USB and other technologies for data transmission, high cost, cumbersome wiring, troublesome maintenance

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