CN213581155U

CN213581155U - Transformer structure loss measuring device

Info

Publication number: CN213581155U
Application number: CN202022601852.XU
Authority: CN
Inventors: 刘涛; 刘兰荣; 马明元; 蔡林峰; 张晓光; 车福来
Original assignee: Baoding Tianwei Baobian Electric Co Ltd
Current assignee: Baoding Tianwei Baobian Electric Co Ltd
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2021-06-29
Anticipated expiration: 2030-11-12

Abstract

The utility model relates to a transformer structure loss measurement device belongs to electromagnetic measurement technical field. The technical scheme is as follows: the transformer structure loss testing device comprises an excitation coil, a first sliding base, a second sliding base, a first sliding rail, a second sliding rail, a structural part base, a fixed base and an integral base, wherein the second sliding base can enable the excitation coil to horizontally move in the axial direction of the excitation coil through the second sliding rail, the axial distance is adjusted, the first sliding base can enable the excitation coil to horizontally move in the radial direction through the first sliding rail, the structural part loss and the magnetic property change of the transformer under different air gaps can be conveniently tested under a non-sinusoidal excitation condition, the requirements on the function and the performance of an excitation power supply are reduced, the structural part loss measurement under a complex excitation condition can be easily realized, data support is further provided for the optimized design of the transformer, the structure of the transformer is optimized, the loss and the heat of the.

Description

Transformer structure loss measuring device

Technical Field

The utility model relates to a transformer structure loss measurement device belongs to electromagnetic measurement technical field.

Background

At present, with the rapid development of power grid construction and industrial requirements in China, the structure and the operation condition of a transformer become more complex, and the transformer is often required to work under a non-sinusoidal excitation condition. For example, in a converter transformer, a smoothing reactor product and the like in direct current transmission, a winding current contains a direct current component in addition to a plurality of alternating current harmonics during normal operation. Under the non-sinusoidal excitation condition, the magnetic performance of the transformer structural member is obviously changed compared with that under the sinusoidal excitation, so that the influence of the non-sinusoidal excitation conditions such as alternating current-direct current, harmonic wave-direct current and the like on the loss of the transformer structural member needs to be studied more deeply so as to design a more reasonable structure, further reduce the loss of the transformer during working, reduce the loss and simultaneously reduce the heat dissipation capacity of the transformer during working and prolong the service life of the transformer.

However, the complicated excitation condition puts higher requirements on the power supply, and because the current of the transformer winding contains multiple ac harmonics and dc components, the ac power supply and the dc power supply used for the measurement experiment can not be directly connected in series under general conditions, and if the ac power supply and the dc power supply are forcibly connected in series, the power supply is damaged, and even if a power amplifier type power supply capable of outputting ac and dc simultaneously is provided, the power supply is limited by insufficient capacity or inconvenient output regulation.

To above problem, the utility model provides a transformer structure loss measurement device can test different structures loss and the magnetic property change under the different excitation conditions, and then provides data support for transformer optimal design, through optimizing the transformer structure, can reduce the transformer loss, improves transformer life.

SUMMERY OF THE UTILITY MODEL

The utility model provides a transformer structure loss measurement device adopts this device can convenient and fast ground to transformer structure loss and magnetic property change under the nonsinusoidal excitation conditions such as interchange-direct current, harmonic wave-direct current and test, and then for transformer optimal design provides data support, optimizes the transformer structure, reduces the transformer and generates heat, improves life.

In order to achieve the purpose, the transformer structural part loss measuring device comprises the following scheme: a transformer structural member loss measuring device comprises an exciting coil, a first sliding base, a second sliding base, a first sliding rail, a second sliding rail, a structural member base, a fixed base and an integral base;

the fixed base is fixedly connected with the whole base, the first sliding rail is fixedly connected with the whole base, the first sliding base is matched with the first sliding rail, the first sliding base can slide along the first sliding rail, the second sliding rail is fixedly connected with the first sliding base, the second sliding base is matched with the second sliding rail, and the second sliding base can slide along the second sliding rail. The device comprises four exciting coils, wherein the two exciting coils are a group, one group is arranged on a fixed base, the fixed base is fixedly connected with the whole base, the other group is arranged on a sliding base II, the two sliding base II can enable the exciting coils to horizontally move in the axial direction of the exciting coils through a sliding rail II, so that the distance between the two groups of exciting coils can be adjusted, the first sliding base I can enable the exciting coils to horizontally move in the radial direction of the exciting coils through a sliding rail I, so that the distance between the two groups of exciting coils can be adjusted, and the structural member base is arranged on the whole base.

Furthermore, the transformer structural part loss measuring device, the sliding base I, the sliding base II, the sliding rail I, the sliding rail II, the structural part base and the fixed base are all made of non-magnetic conductive insulating materials.

Furthermore, the whole base of the transformer structural part loss measuring device is made of non-magnetic conductive insulating materials.

Furthermore, the transformer structural part loss measuring device adopts a dovetail groove sliding structure in a sliding fit mode of the first base and the first sliding rail and the second sliding base and the second sliding rail.

Further, the transformer structure loss measuring device, the structure base passes through the spout structure and installs in whole base, and when the experiment, the structure of being tested is installed in the structure base, can adjust the air gap size between structure and the coil through the spout structure, obtains different experimental parameters.

The utility model has the advantages that: the device can conveniently test the energy loss and the magnetic property change of the transformer structural part under the non-sinusoidal excitation conditions of alternating current-direct current, harmonic wave-direct current and the like and different air gaps, reduces the functional and performance requirements on the excitation power supply, and can easily realize the structural part loss measurement under the complex excitation condition. And further, data support is provided for the optimized design of the transformer, the structure of the transformer is optimized, the working loss of the transformer is reduced, and the service life of the transformer is prolonged.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic side view of the present invention;

fig. 3 is a schematic structural view of the present invention with the exciting coil and the fixing base removed;

in the figure: 1. exciting a first coil; 2. a second exciting coil; 3. exciting a coil III; 4. exciting a coil IV; 5. a second sliding base; 6. a first sliding base; 7. a first slide rail; 8. a second slide rail; 9. a structural member base; 10. a structural member; 11. a fixed base; 12. an integral base.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, a transformer structural member loss measurement apparatus includes a first excitation coil 1, a second excitation coil 2, a third excitation coil 3, a fourth excitation coil 4, a first sliding base 6, a second sliding base 5, a first sliding rail 7, a second sliding rail 8, a structural member base 9, a fixed base 11, and an integral base 12.

The fixed base 11 is fixedly connected with the integral base 12, the first sliding rail 7 is fixedly connected with the integral base 12, the first sliding base 6 is matched with the first sliding rail 7, the first sliding base 6 can slide along the first sliding rail 7, the second sliding rail 8 is fixedly connected with the first sliding base 6, the second sliding base 5 is matched with the second sliding rail 8, the second sliding base 5 can slide along the second sliding rail 8, the first excitation coil 1 and the second excitation coil 2 are installed on the fixed base 11, the third excitation coil 3 and the fourth excitation coil 4 are respectively installed on the second sliding base 5, the second sliding base 5 can enable the third excitation coil 3 and the fourth excitation coil 4 to horizontally move in the axial direction of the excitation coil through the second sliding rail 8, therefore, the axial distance between the third excitation coil 3 and the fourth excitation coil 4 is adjusted, the first sliding base 6 can enable the third excitation coil 3 and the fourth excitation coil 4 to horizontally move in the radial direction of the excitation coil through the first sliding rail 7, and the structural member base 9 is arranged on the whole base 12 according to the distance between the second excitation coil 2 and the third excitation coil 3 and the distance between the fourth excitation coil 4.

In the experimental process, the structural member 10 is mounted on the structural member base 9, and the loss is obtained by reducing the no-load through the load, namely the loss of the structural member, and the loss of the coil of the structural member is not contained. The first excitation coil 1 and the second excitation coil 2 are in one group, the third excitation coil 3 and the fourth excitation coil 4 are in one group, and the load loss can be obtained by one-time measurement after different types of excitation sources are applied to the two coil groups respectively. The no-load loss can be obtained by measuring twice, namely, the same type of excitation condition is firstly added to two excitation coil groups, wherein the excitation condition of one group corresponds to the working condition of the two excitation coil groups during loading, the other group plays a magnetic leakage flux compensation role to make up for the change of the magnetic leakage flux distribution around the coil group with the structural part removed, after the coil loss of the former is obtained by measurement, the other type of excitation condition is simultaneously added to the two excitation coil groups, the excitation condition of the latter corresponds to the working condition of the two excitation coil groups during loading, the former plays a magnetic leakage flux compensation role to obtain the excitation coil loss of the latter, the losses of the two excitation coil groups obtained by measuring twice are added to obtain the no-load loss, and finally the structural part loss under the complex excitation condition is obtained.

According to the experiment requirement, the three excitation coils 3 and the four excitation coils 4 are moved to proper positions required by the experiment through the matching of the first sliding base 6 and the first sliding rail 7, and the second sliding base 5 and the second sliding rail 8; placing the structural member 10 on the structural member base 9 and adjusting the position; applying different types of power excitation conditions to the excitation coil groups on the two sides of the structural member 10 respectively to realize measurement of the load, namely the total loss of the structural member; the structural member 10 is removed, one of the same excitation conditions as that of the load is applied to the two coil groups at the same time, one of the excitation conditions is the same as that of the load, the other excitation condition is the same as that of the load, after the measurement result of the former is obtained, the other excitation condition is the same as that of the load is applied to the two excitation coil groups at the same time, and at the same time, the measurement result of the latter excitation coil is obtained. And adding the two losses of the excitation coil groups obtained by the two measurements to obtain the no-load loss. The current directions of the two excitation coil groups need to determine a connection scheme according to the leakage magnetic field direction required by an experiment and whether the structural member conducts magnetism, and experimental data are collated to obtain the structural member loss under the complex excitation condition.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a transformer structure loss measuring device which characterized in that: the transformer structure loss measuring device comprises a first excitation coil (1), a second excitation coil (2), a third excitation coil (3), a fourth excitation coil (4), a first sliding base (6), a second sliding base (5), a first sliding rail (7), a second sliding rail (8), a structure base (9), a fixed base (11) and a whole base (12), wherein the fixed base (11) is fixedly connected with the whole base (12), the first sliding rail (7) is fixedly connected with the whole base (12), the first sliding base (6) is matched with the first sliding rail (7), the second sliding rail (8) is fixedly connected with the first sliding base (6), the second sliding base (5) is matched with the second sliding rail (8), the first excitation coil (1) is installed on the fixed base (11) with the second excitation coil (2), and the third excitation coil (3) and the fourth excitation coil (4) are respectively installed on the second sliding base (6) 5) The structural member base (9) is mounted to the integral base (12).

2. The transformer structure loss measuring device of claim 1, wherein: the sliding base I (6), the sliding base II (5), the sliding rail I (7), the sliding rail II (8), the structural part base (9) and the fixed base (11) are all made of non-magnetic conductive insulating materials.

3. The transformer structure loss measuring device of claim 2, wherein: the integral base (12) is made of non-magnetic conductive insulating materials.

4. The transformer structure loss measuring device of claim 3, wherein: the sliding fit mode of the first sliding base (6) and the first sliding rail (7) and the second sliding base (5) and the second sliding rail (8) is a dovetail groove sliding structure.

5. The transformer structure loss measuring device of claim 4, wherein: the structural member base (9) is installed on the integral base (12) through a sliding groove structure.