CN112903266A - Transformer mechanical fault sound simulation device and transformer assembly - Google Patents

Abstract

The application provides a transformer mechanical fault sound simulation device and a transformer assembly. The device comprises a winding, a resistance module, a switch and an alternating current power supply which are sequentially connected in series, and further comprises an E-shaped silicon steel sheet and a bar-shaped silicon steel sheet, wherein the winding is wound on the E-shaped silicon steel sheet, and a preset distance is reserved between the E-shaped silicon steel sheet and the bar-shaped silicon steel sheet. The switch is closed in the scheme, so that the strip-shaped silicon steel sheet is adsorbed on the E-shaped silicon steel sheet, the winding continuously vibrates, the vibrating winding is placed on different transformer parts to simulate the impact sounds of different parts, and the abnormal sound generated by mechanical mutual impact of certain parts of the transformer due to the vibration of the iron core can be simulated. And a reference is provided for the sound of the actual mechanical fault of the transformer.

Description

Transformer mechanical fault sound simulation device and transformer assembly

The present application priority document entitled 202022443722.8 transformer mechanical failure sound simulator and transformer assembly, filed 10/28/2020, is incorporated herein by reference in its entirety.

Technical Field

The application relates to the field of transformer mechanical fault recognition, in particular to a transformer mechanical fault sound simulation device, a transformer assembly and a method for simulating transformer mechanical fault sound.

Background

The power transformer is one of the most important devices in the power system, and its operation state greatly affects the safe and economic operation of the power system. Due to the complex structure of the high voltage equipment, mechanical failures are also easily generated in addition to electrical failures. According to incomplete statistics, 18 transformer damage accidents with the voltage class of more than 110kV exist in the power system in 2005. The transformer fault not only causes economic loss due to equipment replacement, but also causes more huge indirect economic loss due to power interruption of the equipment replacement. Therefore, the research on the mechanical fault of the transformer has great significance for timely eliminating the hidden trouble of the transformer and improving the reliability of the transformer in the development of a power system.

When a mechanical failure occurs in the transformer, a peculiar sound is often emitted. The failure occurs in different mechanisms and the sound emitted by the transformer is different. The experienced expert can distinguish the fault reason and mechanism of the transformer according to different sounds. However, the discrimination of the failure requires accumulation of experience and is difficult to learn. Moreover, the sound of the transformer in the operation process is noisy, the background noise is high, the sound may be distorted through air transmission, and it is difficult for an experienced expert to accurately distinguish the sound generated by the transformer fault in the high noise. Therefore, the sound of the transformer under different faults is analyzed and processed, the audio database is researched, the transformer state diagnosis model is established, the difficulty of distinguishing the transformer fault by listening to the sound can be greatly reduced, the labor cost is reduced, and the accuracy of transformer fault diagnosis is improved.

The diagnosis of the mechanical failure of the transformer by means of the sound signal is a new research direction in recent years. Certain parts of the transformer will make abnormal sound when they are mechanically impacted and contacted with each other due to the vibration of the iron core. But few models of transformers exist today for this purpose. Therefore, the patent provides a sound simulation device for mechanical fault of the transformer, which provides reference for sound diagnosis research of the transformer.

Disclosure of Invention

The present application mainly aims to provide a transformer mechanical failure sound simulation apparatus, a transformer assembly, and a method for simulating transformer mechanical failure sound, so as to solve the problem that an apparatus for simulating transformer mechanical failure sound is absent in the prior art.

In order to realize above-mentioned purpose, according to an aspect of this application, provide a transformer machinery trouble sound analogue means, including winding, resistance module, switch and the alternating current power supply who establishes ties in proper order, still include E type silicon steel sheet and bar silicon steel sheet, the winding is in on the E type silicon steel sheet, E type silicon steel sheet with predetermined interval has between the bar silicon steel sheet.

Further, the resistance module includes a plurality of resistances.

Further, the switch is one of: a key switch, a toggle switch and a membrane switch.

According to another aspect of the present application, there is provided a transformer assembly, the transformer assembly comprising a transformer body and a transformer mechanical failure sound simulator, the transformer mechanical failure sound simulator being any one of the transformer mechanical failure sound simulators.

Further, the transformer assembly also includes a ferrous component proximate to the winding.

Further, the ferrous component includes at least one of: screws, nuts, bolts, washers, rivets.

According to another aspect of the present application, there is provided a method for simulating the sound of a mechanical failure of a transformer, comprising constructing a sound simulation apparatus; and simulating the mechanical fault sound of the transformer by adopting the sound simulation device.

Use the technical scheme of this application, closed switch for bar silicon steel sheet is adsorbed on E type silicon steel sheet, and the winding constantly vibrates, can simulate the sound of the iron core winding vibration of transformer, and when some parts of simulation transformer caused mechanical mutual striking contact because of the iron core vibration, produces continuous regular "hammering", provides the reference for actual transformer mechanical fault sound.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:

FIG. 1 shows a schematic diagram of a transformer mechanical fault acoustic simulation apparatus according to an embodiment of the present application;

FIG. 2 is a schematic diagram illustrating a partial structure of a transformer mechanical failure sound simulation apparatus according to an embodiment of the present application;

fig. 3 shows a transformer model schematic according to an embodiment of the application.

Wherein the figures include the following reference numerals:

10. a winding; 20. a resistance module; 30. a switch; 40. an alternating current power supply; 50. e-shaped silicon steel sheets; 60. strip-shaped silicon steel sheets; 70. transformer tank.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.

As described in the background of the invention, there is no device for simulating the mechanical failure sound of a transformer in the prior art, and in order to solve the problem of the lack of the device for simulating the mechanical failure sound of a transformer, the present application provides a device for simulating the mechanical failure sound of a transformer, a transformer assembly and a method for simulating the mechanical failure sound of a transformer.

Fig. 1 shows a schematic diagram of a transformer mechanical fault acoustic simulation apparatus according to an embodiment of the present application. Fig. 2 shows a schematic structural diagram of a part of a transformer mechanical failure sound simulation device according to an embodiment of the application. As shown in fig. 1 and 2, the device includes a winding 10, a resistance module 20, a switch 30, an ac power source 40, an E-shaped silicon steel sheet 50 and a bar-shaped silicon steel sheet 60, which are connected in series in sequence, wherein the winding 10 is wound on the E-shaped silicon steel sheet 50, and a predetermined distance is provided between the E-shaped silicon steel sheet 50 and the bar-shaped silicon steel sheet 60.

Specifically, the predetermined distance may be 0.5cm, 1cm, 2cm, etc., and those skilled in the art may set other predetermined distances according to actual requirements.

Specifically, the alternating current power supply is a 50Hz alternating current power supply.

Specifically, the E-shaped silicon steel sheet is an E-shaped iron core, and the strip-shaped silicon steel sheet is a strip-shaped iron core.

In the scheme, the switch is closed, so that the strip-shaped silicon steel sheet is adsorbed on the E-shaped silicon steel sheet, the winding continuously vibrates, the vibration sound of the iron core winding of the transformer can be simulated, and continuous regular hammering is generated when certain parts of the transformer are in mechanical mutual impact contact due to the vibration of the iron core, and reference is provided for the actual mechanical fault sound of the transformer.

In a more specific embodiment, the placement of the vibrating windings on different transformer components simulates the continuous regular "hammering" of certain transformer components into mechanical impact contact with each other due to core vibration.

In one embodiment of the present application, the resistance module includes a plurality of resistances. For example, the resistor module includes a resistor with a resistance of 50 Ω, a resistor with a resistance of 100 Ω, and a resistor with a resistance of 200 Ω, and three resistors are connected in series to form the resistor module with a resistance of 350 Ω, so as to meet actual requirements.

In an embodiment of the present application, the switch is one of: a key switch, a toggle switch and a membrane switch. Of course, those skilled in the art can select other kinds of switches according to actual needs to meet the needs.

In an exemplary embodiment of the present application, a transformer assembly is provided, where the transformer assembly includes a transformer body and a transformer mechanical failure sound simulator, and the transformer mechanical failure sound simulator is any one of the transformer mechanical failure sound simulators. The transformer body comprises a plurality of transformer parts, and the vibrating windings are placed on different transformer parts, so that continuous regular hammering can be generated when certain parts of the transformer are in mechanical collision contact with each other due to the vibration of the iron core.

In one embodiment of the present application, the transformer assembly further comprises a ferrous component proximate to the winding. Iron parts such as screws or iron pads are arranged near the windings, and the iron parts are repeatedly sucked by the transformer to generate sound due to the changed electric field, so that the friction sound generated when the screws or the iron pads fall into the transformer can be simulated. The simulation screw or the iron pad falls into the transformer, and generates friction sound of 'squeaking and squeaking' under the action of electromagnetic force. And a reference is provided for the sound of the actual mechanical fault of the transformer.

In one embodiment of the present application, the ferrous component includes at least one of: screws, nuts, bolts, washers, rivets. Of course, the skilled person can select other kinds of ferrous parts according to the actual needs.

In another exemplary embodiment of the present application, there is provided a method for simulating a mechanical failure sound of a transformer, including: constructing a sound simulation device, wherein the sound simulation device is the sound simulation device for the mechanical fault of the transformer; the sound simulation device is adopted to simulate the mechanical fault sound of the transformer. This scheme of adoption is through closed switch for bar silicon steel sheet is adsorbed on E type silicon steel sheet, and the winding constantly vibrates, can simulate the sound of the iron core winding vibration of transformer to and when some parts of simulation transformer caused mechanical mutual striking contact because of the iron core vibration, produce continuous regular "hammering", provide the reference for the transformer mechanical fault sound of reality.

Examples

The application relates to a specific sound simulation device for mechanical failure of a transformer. As shown in fig. 1 and 2, the device includes a winding 10, a resistance module 20, a switch 30, an ac power source 40, an E-shaped silicon steel sheet 50 and a bar-shaped silicon steel sheet 60, which are connected in series in sequence, wherein the winding 10 is wound on the E-shaped silicon steel sheet 50, and a predetermined distance is provided between the E-shaped silicon steel sheet 50 and the bar-shaped silicon steel sheet 60. The predetermined distance is 3cm, the resistance value of the resistor module 20 is 200 Ω, and the ac power supply 40 is a 50Hz ac power supply 40.

Specifically, as shown in fig. 1, switch 30 is closed and winding 10 draws a nearby ferrous component under the influence of the alternating current and produces a "buzzing" sound.

This patent can simulate two kinds of sounds. The vibration of the silicon steel sheet is increased due to the fact that the contact inside the transformer is poor or insulation breakdown positions exist, and individual parts such as screws of clamping pieces or compression iron cores inside the transformer are loosened. Certain parts of the transformer, when brought into mechanical impact contact with each other due to the vibration of the core, produce a continuous regular "hammering" and "wind blowing" sounds, such as "jingle" and "hui … hui …". The specific operation is to close the switch, so that the strip-shaped silicon steel sheet is adsorbed on the E-shaped silicon steel sheet, and the winding continuously vibrates. The impact sounds of different parts can be simulated by placing the vibrating windings on different transformer parts.

The screw or the iron pad falls into the transformer to generate the friction sound of 'squeaking and squeaking' under the action of electromagnetic force. The simulation method comprises the following steps: iron members such as screws and iron pads are placed near the windings, and the iron members are repeatedly attracted by the transformer due to the changing electric field to generate sound.

Specifically, as shown in FIG. 3, placing small metal parts in various locations in the transformer tank 70 simulates the sound that may be generated inside an actual transformer. A microphone is arranged 5cm away from the transformer oil tank, and can record the sound transmitted from the oil tank.

Distribution transformer iron core noise is because the iron core vibration produces, mainly comprises two parts: the iron core of the distribution transformer is formed by overlapping silicon steel sheets, the silicon steel sheets are made of ferromagnetic materials and can be subjected to magnetostriction force in a magnetic field, and the iron core can vibrate under the action of the magnetostriction force; because there is some clearance in the silicon steel sheet seam department of iron core and between the lamination to there is the leakage flux to flow through, thereby distribution transformer iron core can receive the effect vibration of electromagnetic force because of the leakage flux.

Distribution transformer windings are usually made of copper materials, because copper has a relatively good conductivity, the load loss can be reduced. The current shape of the coil is largely classified into a cylindrical shape and a rectangular shape. The device is a cylindrical copper wire coil. Insulating cushion blocks exist between copper wire sections of the windings, and the insulating cushion blocks can influence the vibration of the windings. The distribution transformer winding generates leakage flux after through-flow, and the magnitude of the leakage flux is related to the magnitude of current on the power supply side. The windings are subjected to electrodynamic forces by leakage flux to generate vibrations which are transmitted to the housing through the transformer structural elements and radiate noise to the surroundings.

The device is manufactured according to the noise generation principle of the transformer and can simulate three sounds, namely a) the sound generated by friction between small metal parts and the bottom of a coil in an oil tank; b) the sound generated by the friction between the metal small parts and the clamping piece; c) the sound produced by the friction of the small metal parts and the pressure plate.

Specifically, the metal small parts are placed at the bottom of the coil, the power supply is switched on, and the windings attract the metal small parts to generate abnormal sound under the action of electromagnetic force. And changing the positions of the metal small parts, for example, putting the metal parts on the clamping piece and the pressing plate, and simulating abnormal sounds generated when the metal parts fall into different positions in the transformer.

The generated vibration of the winding and the generated vibration of the core are core vibration sources of the transformer vibration. The winding produces electrodynamic force because of passing through the electric current and makes the winding do the forced vibration, and this vibration has apparent load following effect, and vibration can strengthen in a plurality of frequency domain sections along with the increase of electric current promptly, and vibration can reduce in a plurality of frequency domain sections along with the electric current reduction, and this vibration mainly passes through transformer oil and transmits to the box surface, also passes through the rigid connection with the iron core and transmits to the iron core again through transformer oil and reaches the oil tank profile. The vibration of the iron core is mainly generated by Lorentz force and magnetostriction, is transmitted to the outline of the oil tank through transformer oil, is directly transmitted to the surface of the transformer through rigid connection of the iron core and a transformer shell, and is transmitted to the winding firstly through direct connection with the winding and then transmitted to the outline of the tank body through the transformer oil. In summary, the vibration obtained from the surface of the transformer oil tank is the result of complex coupling convolution through different transmission paths due to the vibration generated by a plurality of vibration sources.

According to an actual sound transmission path in the transformer, the device simulates a fault sound transmission path, fault sound is transmitted to an oil tank through transformer oil, and the oil tank vibrates to drive surrounding air to make sound; or sound is picked up by the microphone by conducting vibrations to the box profile through a direct connection to the windings.

From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects:

1) the utility model provides a transformer mechanical failure sound analogue means, closed switch for bar silicon steel sheet is adsorbed on the E type silicon steel sheet, and the winding constantly vibrates, can simulate the sound of the iron core winding vibration of transformer, and when some parts of simulation transformer caused mechanical mutual striking contact because of the iron core vibration, produce continuous regular "hammering", provide the reference for actual transformer mechanical failure sound.

2) The utility model provides a transformer assembly, transformer body include a plurality of transformer parts, place the winding of vibration on different transformer parts, can simulate some parts of transformer and cause mechanical mutual striking contact because of the iron core vibration, produce continuous regular "hammering".

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (7)

1. The utility model provides a transformer machinery trouble sound analogue means, its characterized in that includes winding, resistance module, switch and the alternating current power supply who establishes ties in proper order, still includes E type silicon steel sheet and bar silicon steel sheet, the winding is in on the E type silicon steel sheet, the E type silicon steel sheet with predetermined interval has between the bar silicon steel sheet.

2. The apparatus of claim 1, wherein the resistance module comprises a plurality of resistances.

3. The apparatus of claim 1, wherein the switch is one of: a key switch, a toggle switch and a membrane switch.

4. A transformer assembly, characterized in that the transformer assembly comprises a transformer body and a transformer mechanical fault sound simulator, the transformer mechanical fault sound simulator being as claimed in any one of claims 1 to 3.

5. The transformer assembly of claim 4, further comprising a ferrous component proximate to the winding.

6. The transformer assembly of claim 5, wherein the ferrous component comprises at least one of:

screws, nuts, bolts, washers, rivets.

7. A method of simulating the sound of a mechanical fault in a transformer, comprising:

constructing a sound simulation device, wherein the sound simulation device is the transformer mechanical failure sound simulation device in claim 1;

and simulating the mechanical fault sound of the transformer by adopting the sound simulation device.

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