CN216646661U - Transformer fault simulation device - Google Patents
Transformer fault simulation device Download PDFInfo
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- CN216646661U CN216646661U CN202122616745.9U CN202122616745U CN216646661U CN 216646661 U CN216646661 U CN 216646661U CN 202122616745 U CN202122616745 U CN 202122616745U CN 216646661 U CN216646661 U CN 216646661U
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Abstract
A transformer fault simulation device comprises a transformer, wherein the transformer comprises a control module, the control module is connected with a direct-current resistance fault module, a transformation ratio fault module, a winding deformation fault module, an alternating-current withstand voltage fault module, a dielectric loss fault module and an iron core grounding fault module, and the control module controls the actions of the direct-current resistance fault module, the transformation ratio fault module, the winding deformation fault module, the alternating-current withstand voltage fault module, the dielectric loss fault module and the iron core grounding fault module. The high-voltage winding wiring group of the three-winding transformer is YN, the terminals of the medium-voltage winding and the low-voltage winding are connected to the adapter plate and connected with the adapter plate in a Y shape or a triangular shape in different transformation ratios, and various transformer test items and various normal and abnormal states can be trained through the direct-current resistance fault module, the transformation ratio fault module, the winding deformation fault module, the alternating-current withstand voltage fault module, the dielectric loss fault module and the iron core grounding fault module of the transformer.
Description
Technical Field
The utility model relates to the technical field of transformer fault simulation, in particular to a transformer fault simulation device.
Background
Along with the development of the power system, the position of the transformer in the power system is particularly important, if the transformer fails, the transformer can cause great influence on life and production, under the general condition, most transformers are in a normal state when being tested on site, and therefore, the phenomenon that the fault reason can not be found when the transformer fails in normal test can occur. Therefore, the requirement for the control condition of the corresponding transformer by the maintainer is higher, and the requirement for the fault test of the transformer is increased accordingly.
The traditional transformer high-voltage test training generally needs a set of real transformers to be used as a tested object, namely, to test the high-voltage condition of a 110KV transformer, a set of real 110KV transformer is needed and no fault is set, generally, the damaged transformer body cannot be recovered to a normal state in a short time, and the test mode is high in cost and unobvious in effect.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a transformer fault simulation device capable of realizing various test items.
The technical problem to be solved by the utility model is realized by adopting the following technical scheme:
a transformer fault simulation device comprising a transformer, the transformer being a three-phase three-winding dry transformer, the transformer comprising:
the control module is used for controlling the winding conversion of the transformer to realize different test functions;
the direct-current resistance fault module changes the disconnection and short circuit of a winding in a transformer loop by changing the on-off state of a relay, and controls and realizes the resistance short-circuit state and short-circuit state fault of the transformer;
the transformation ratio fault module is used for changing the connection mode of the winding through a relay and setting the change of different connection modes or fault change;
the winding deformation fault module is used for adjusting the winding deformation fault of the transformer by changing electrical elements in a loop to realize three-phase synchronization or phase splitting;
the alternating current voltage withstand fault module is used for realizing different voltages in a voltage withstand test by changing the connection mode of elements in a loop;
the dielectric loss fault module is used for simulating the damage conditions of the transformer insulation in different degrees under different conditions;
the iron core grounding fault module is used for simulating the insulation damage conditions of the iron core of the transformer in different degrees;
the direct-current resistance fault module, the transformation ratio fault module, the winding deformation fault module, the alternating-current voltage-withstanding fault module, the dielectric loss fault module and the iron core grounding fault module are connected to the control module, and the control module controls the actions of the direct-current resistance fault module, the transformation ratio fault module, the winding deformation fault module, the alternating-current voltage-withstanding fault module, the dielectric loss fault module and the iron core grounding fault module.
Preferably, the neutral point of the transformer is provided with a tap for regulating +/-2 x 2.5% or +/-5%, and 12 terminals of the medium-voltage winding and the low-voltage winding are connected to an adapter plate and can be connected in a Y shape or a triangular shape as different transformation ratios.
Preferably, the wiring group of the high-voltage winding of the transformer is YN.
Preferably, the control module is connected with a wireless transmission module, the wireless transmission module is used for transmitting and receiving wireless signals, remotely sending a control instruction to the control module, and the control module sends the operation parameter information of the transformer through the wireless transmission module.
Preferably, the dc resistance fault module includes a high voltage relay, the medium voltage winding and the low voltage winding of the transformer are connected through the high voltage relay, and the low voltage winding is connected in parallel with a high voltage relay loop.
Preferably, the ratio-change fault module connects the medium voltage winding in series with the low voltage winding through a relay.
Preferably, the dielectric loss fault module forms a loop with a capacitor and a resistor through a relay, and the control module changes the internal connection mode of the loop to realize simulation of a dielectric loss test.
Preferably, the control module is connected with an upper computer or a user side through the wireless transmission module, the wireless transmission module carries out bidirectional transmission on data information among the control module, the upper computer and the user side, a control instruction is sent through specific software in the upper computer, the software is an existing data communication algorithm, and as long as the purpose of receiving, processing and sending data can be achieved, a user can remotely carry out fault simulation test control on the transformer.
Preferably, a high-voltage capacitor of 15000pF to 25000pF is connected to a high-voltage winding of the transformer in parallel, so that various insulation tests of large and medium-sized transformers of 110KV and above are facilitated.
The utility model has the advantages and positive effects that:
the high-voltage winding wiring group of the three-winding transformer is YN, the neutral point end is provided with a tap for regulating voltage +/-2 x 2.5% or +/-5%, the terminals of the medium-voltage winding and the low-voltage winding are connected to a transfer board to be connected with different transformation ratios and Y-shaped or triangular shapes, various transformer test projects and various normal and abnormal states can be trained through a direct-current resistance fault module, a transformation ratio fault module, a winding deformation fault module, an alternating-current voltage-withstanding fault module, a dielectric loss fault module and an iron core grounding fault module of the transformer, meanwhile, the transformer can be switched between the normal state and the abnormal state at will through the control of a central centralized control platform, various real sites are restored to the maximum extent, the routine systematic training of a primary test student of the power transformer test projects specified by national and power industry standards and the common fault analysis and judgment of a higher-level student are met, the transformer test training is more flexible, and the transformer test capability of the electrical overhaul personnel is really improved, and meanwhile, the cost of the training test is greatly reduced.
Drawings
FIG. 1 is a schematic wiring diagram of the principles of the present invention;
FIG. 2 is a schematic diagram of the internal principle wiring of the transformer of the present invention;
FIG. 3 is a schematic top layout of the transformer of the present invention;
fig. 4 is a general connection diagram of the transformer of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
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 invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The embodiments of the utility model will be described in further detail below with reference to the accompanying drawings:
the utility model relates to a transformer fault simulation device, which comprises a transformer, wherein the transformer is a three-phase three-winding dry-type transformer, the rated voltage of the transformer is 10KV/0.6KV/0.4KV, the neutral point of the transformer is provided with a tap for regulating +/-2 x 2.5% or +/-5%, 12 terminals of medium-voltage and low-voltage windings are connected to a transfer board and can be used for connection with Y-type or triangular-type transformers in different transformation ratios, the wiring group of the high-voltage winding of the transformer is YN, a high-voltage capacitor of 15000pF-25000pF is connected to the high-voltage winding of the transformer in parallel, and various insulation tests of large and medium-sized transformers of 110KV and above are facilitated The winding deformation fault module, the alternating current voltage-withstand fault module, the dielectric loss fault module and the iron core grounding fault module control the actions of the direct current resistance fault module, the transformation ratio fault module, the winding deformation fault module, the alternating current voltage-withstand fault module, the dielectric loss fault module and the iron core grounding fault module through the control module.
The function and constitution of each functional block are explained in detail below:
the direct-current resistance fault module comprises a high-voltage relay, a medium-voltage winding and a low-voltage winding of the transformer are connected in different connection modes through the high-voltage relay, a high-voltage relay loop is connected in parallel to the low-voltage winding, the direct-current resistance fault module changes disconnection and short circuit of the winding in the transformer loop by changing the on-off state of the relay, and the resistance value short circuit state and short circuit state fault of the transformer are controlled and realized;
the transformer ratio fault module is used for changing the connection mode of the windings through the relay, realizing the conversion over-tolerance of the ratio, and setting the ratio change or fault change of different connection modes;
the winding deformation fault module realizes curve change of each frequency band of each winding of the transformer under different conditions by changing the difference of resistance, inductance and capacitance in a loop, and can simultaneously adjust three phases and adjust phases in different phases so as to realize various conditions of winding deformation faults of the transformer;
the alternating current voltage-withstand fault module is connected through a relay, a ball gap and a resistor, and insulation problems of the transformer under different conditions are realized by changing the connection mode of elements in a loop through the control module, so that different phenomena are reflected in a voltage-withstand test, and the voltage-withstand test is mainly reflected in different voltages;
the medium loss fault module forms a loop through a relay, a capacitor and a resistor, changes the internal connection mode of the loop through the control module, realizes the simulation of a medium loss test, simulates the damage of the transformer insulation in different degrees under different conditions, is divided into the states of serious insulation damage, moderate insulation damage, slight moisture and the like, and is reflected in the result of the medium loss test for the analysis and study of testers;
the iron core grounding fault module changes the insulation condition of the iron core to the ground by each resistor and other components in the relay control circuit, wherein the insulation condition also comprises the conditions of serious insulation damage, medium insulation damage, slight insulation damage and the like, and is used for simulating the insulation damage conditions of the iron core of the transformer in different degrees.
In addition, in order to remotely operate the transformer, the control module is connected with a wireless transmission module, the wireless transmission module is used for transmitting and receiving wireless signals, and remotely transmits a control instruction to the control module, the control module transmits running parameter information of the transformer through the wireless transmission module, the control module is connected with an upper computer or a user side through the wireless transmission module, the wireless transmission module carries out bidirectional transmission on the control module and data information between the upper computer and the user side, the upper computer transmits the control instruction through specific software, the software is an existing data communication algorithm, as long as the receiving, processing and transmitting of data can be achieved, a user can remotely carry out fault simulation test control on the transformer and control each functional module in the transformer, and therefore the transformer can carry out switching between a normal state and an abnormal state.
As shown in the connection schematic diagrams of fig. 1 to fig. 4, A, B, C is a three-phase terminal of the 110KV transformer, 0 is a neutral point, Am, Bm, and Cm are three-phase terminals of 35KV, and a, b, and c are three-phase terminals of 10 KV.
During specific implementation, the transformer fault simulation device can carry out 11 kinds of transformer high-voltage test projects, including: the method comprises the following steps of measuring the insulation resistance absorption ratio of a transformer winding and a sleeve, measuring the direct current leakage current of the transformer winding and the sleeve, measuring the dielectric loss and capacitance of the transformer winding and the sleeve, measuring the insulation resistance of an iron core and a clamping piece, carrying out an alternating current withstand voltage test of the transformer winding and the sleeve, measuring the direct current resistance of the winding and the sleeve, carrying out a voltage transformation ratio test, carrying out a transformer winding deformation test, measuring the dielectric loss and capacitance of an impure porcelain sleeve, measuring the end screen insulation resistance and the dielectric loss of the impure porcelain sleeve and equalizing a high-voltage core of a power system, wherein each test item can also extend 2-3 normal and abnormal test states, and randomly switching over 30 normal and abnormal test states in total, so that the data change of the transformer under different fault conditions can be clearly reflected.
The high-voltage winding wiring group of the three-winding transformer is YN, the neutral point end is provided with a tap for regulating voltage +/-2 x 2.5% or +/-5%, the terminals of the medium-voltage winding and the low-voltage winding are connected to a transfer board to be connected with different transformation ratios and Y-shaped or triangular shapes, various transformer test projects and various normal and abnormal states can be trained through a direct-current resistance fault module, a transformation ratio fault module, a winding deformation fault module, an alternating-current voltage-withstanding fault module, a dielectric loss fault module and an iron core grounding fault module of the transformer, meanwhile, the transformer can be switched between the normal state and the abnormal state at will through the control of a central centralized control platform, various real sites are restored to the maximum extent, the routine systematic training of a primary test student of the power transformer test projects specified by national and power industry standards and the common fault analysis and judgment of a higher-level student are met, the transformer test training is more flexible, and the transformer test capability of the electrical overhaul personnel is really improved, and meanwhile, the cost of the training test is greatly reduced.
It should be emphasized that the embodiments described herein are illustrative rather than restrictive, and thus the present invention is not limited to the embodiments described in the detailed description, but other embodiments derived from the technical solutions of the present invention by those skilled in the art are also within the scope of the present invention.
Claims (9)
1. A transformer fault simulation device is characterized in that: the transformer is a three-phase three-winding dry type transformer, and comprises:
the control module is used for controlling the winding conversion of the transformer to realize different test functions;
the direct-current resistance fault module changes the disconnection and short circuit of a winding in a transformer loop by changing the on-off state of a relay, and controls and realizes the resistance short-circuit state and short-circuit state fault of the transformer;
the transformation ratio fault module is used for changing the connection mode of the winding through a relay and setting the change of different connection modes or fault change;
the winding deformation fault module is used for adjusting the winding deformation fault of the transformer by changing electrical elements in a loop to realize three phases simultaneously or in a split phase manner;
the alternating current voltage withstand fault module is used for realizing different voltages in a voltage withstand test by changing the connection mode of elements in a loop;
the dielectric loss fault module is used for simulating the damage conditions of the transformer insulation in different degrees under different conditions;
the iron core grounding fault module is used for simulating the insulation damage conditions of the iron core of the transformer in different degrees;
the direct-current resistance fault module, the transformation ratio fault module, the winding deformation fault module, the alternating-current voltage-withstanding fault module, the dielectric loss fault module and the iron core grounding fault module are connected to the control module, and the control module controls the actions of the direct-current resistance fault module, the transformation ratio fault module, the winding deformation fault module, the alternating-current voltage-withstanding fault module, the dielectric loss fault module and the iron core grounding fault module.
2. The transformer fault simulator of claim 1, wherein: the neutral point of the transformer is provided with a tap for regulating the voltage by +/-2 x 2.5% or +/-5%.
3. The transformer fault simulator of claim 1, wherein: and the wiring group of the high-voltage winding of the transformer is YN.
4. The transformer fault simulator of claim 1, wherein: the control module is connected with a wireless transmission module, the wireless transmission module is used for transmitting and receiving wireless signals and remotely sending control instructions to the control module, and the control module sends the operation parameter information of the transformer through the wireless transmission module.
5. The transformer fault simulator of claim 1, wherein: the direct-current resistance fault module comprises a high-voltage relay, a medium-voltage winding and a low-voltage winding of the transformer are connected through the high-voltage relay, and a high-voltage relay loop is connected to the low-voltage winding in parallel.
6. The transformer fault simulator of claim 1, wherein: the ratio-change fault module connects the medium-voltage winding and the low-voltage winding in series through a relay.
7. The transformer fault simulator of claim 1, wherein: the medium loss fault module forms a loop with a capacitor and a resistor through a relay, and the control module changes the internal connection mode of the loop to realize simulation of a medium loss test.
8. The transformer fault simulator of claim 4, wherein: the control module is connected with an upper computer or a user side through the wireless transmission module, and the wireless transmission module carries out bidirectional transmission on data information among the control module, the upper computer and the user side.
9. The transformer fault simulator of claim 1, wherein: and a high-voltage capacitor of 15000pF to 25000pF is connected in parallel to a high-voltage winding of the transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122616745.9U CN216646661U (en) | 2021-10-28 | 2021-10-28 | Transformer fault simulation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122616745.9U CN216646661U (en) | 2021-10-28 | 2021-10-28 | Transformer fault simulation device |
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| Publication Number | Publication Date |
|---|---|
| CN216646661U true CN216646661U (en) | 2022-05-31 |
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| CN202122616745.9U Active CN216646661U (en) | 2021-10-28 | 2021-10-28 | Transformer fault simulation device |
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| CN (1) | CN216646661U (en) |
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- 2021-10-28 CN CN202122616745.9U patent/CN216646661U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20221213 Address after: Room 1446, Building 6, Chuangzhi Green Valley Development Center, No. 788, Hongpu Road, Shangcheng District, Hangzhou, Zhejiang, 310000 Patentee after: Xianheng Electrical Technology (Hangzhou) Co.,Ltd. Address before: 310000 Room 405, No. 27-2, Xingye street, Xiacheng District, Hangzhou City, Zhejiang Province Patentee before: Dr. Tan Electrical Technology (Hangzhou) Co.,Ltd. |
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| TR01 | Transfer of patent right |