CN114113829B - Assembling method of transformer fault simulation device - Google Patents
Assembling method of transformer fault simulation device Download PDFInfo
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- CN114113829B CN114113829B CN202111262261.7A CN202111262261A CN114113829B CN 114113829 B CN114113829 B CN 114113829B CN 202111262261 A CN202111262261 A CN 202111262261A CN 114113829 B CN114113829 B CN 114113829B
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- 238000004088 simulation Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims description 18
- 238000004804 winding Methods 0.000 claims abstract description 84
- 238000012360 testing method Methods 0.000 claims abstract description 42
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 30
- 230000009466 transformation Effects 0.000 claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims description 18
- 238000009413 insulation Methods 0.000 claims description 18
- 239000003990 capacitor Substances 0.000 claims description 9
- 230000007935 neutral effect Effects 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims description 3
- 230000002457 bidirectional effect Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 230000002159 abnormal effect Effects 0.000 abstract description 8
- 238000012549 training Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009897 systematic effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The transformer fault simulation device comprises a transformer shell, the transformer comprises a control module, 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 are connected to the control module, and actions of the direct current resistance fault module, the transformation ratio fault module, the dielectric loss fault module and the iron core grounding fault module are controlled through the control module. The three-winding transformer has the advantages that 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 to be connected in different transformation ratios and Y-type or triangle-type modes, and various transformer test projects and various normal and abnormal states can be trained through the direct-current resistance fault module, transformation ratio fault module, winding deformation fault module, alternating-current withstand voltage fault module, dielectric loss fault module and iron core grounding fault module of the transformer.
Description
Technical Field
The invention relates to the technical field of transformer fault simulation, in particular to an assembling method of a transformer fault simulation device.
Background
Along with the development of the power system becoming more stable, the position of the transformer in the power system is particularly important, if the transformer fails, the life and production of the transformer can be greatly influenced, and in general, most of the transformers are in a normal state when tested on site, so that the phenomenon that the cause of the failure can not be found once the transformer fails in normal test. Therefore, the maintenance personnel have higher requirements on the mastering conditions of the corresponding transformers, and the requirements on the fault test of the transformers are also increased.
The traditional transformer high-voltage test training generally needs a set of real transformers to be used as test products, namely, a set of real 110KV is needed when the high-voltage condition of the transformer of 110KV is to be tested, no fault setting is needed, the transformer body is generally destroyed, the normal state cannot be recovered in a short time, and the test mode is high in cost and insignificant in effect.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a transformer fault simulation device capable of realizing various test projects.
The invention solves the technical problems by adopting the following technical scheme:
the utility model provides an assembly method of transformer trouble analogue means, includes transformer trouble analogue means, transformer trouble analogue means includes the transformer shell, be equipped with high-voltage bushing, well voltage bushing, low-voltage bushing and iron core ground sleeve on the transformer shell high-voltage bushing side of transformer shell has seted up the closing door of being convenient for transformer entering, and the transformer is three-phase three-winding dry-type transformer, the transformer includes:
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 windings in a transformer loop by changing the on-off state of a relay, and controls the realization of 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 winding deformation faults of the transformer by changing electrical elements in a loop to realize three phases simultaneously or in split phases;
the alternating-current voltage withstand fault module is used for realizing voltage difference 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 condition of the transformer insulation with different degrees under different conditions;
the iron core grounding fault module is used for simulating insulation damage conditions of iron cores 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 withstand voltage fault module, the dielectric loss fault module and the iron core grounding fault module are connected to the control module, and 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 are controlled through the control module;
the assembling method of the transformer fault simulation device comprises the following steps:
s1, the high-voltage side of the transformer shell faces outwards, the transformer is moved into the transformer shell, and an insulating piece is filled at the bottom of the transformer, so that a grounding point of an iron core of the transformer is grounded after passing through an iron core grounding sleeve of the transformer shell;
s2, connecting a 10KV winding of the transformer to a high-voltage sleeve of the transformer shell, connecting a 0.6KV winding of the transformer to a medium-voltage sleeve of the transformer shell, connecting a 0.4KV winding of the transformer to a low-voltage sleeve of the transformer shell, and connecting the transformer to an iron core grounding sleeve of the transformer shell;
and S3, connecting a high-voltage capacitor and a discharge ball gap in parallel between the neutral point of the high-voltage winding of the transformer and the ground.
Preferably, the neutral point of the transformer is provided with taps for regulating the voltage by + -2.5% or + -5%, and 12 terminals of the medium-voltage and low-voltage windings are connected to the adapter plate, which can be used as different transformation ratios and Y-type or delta-type connection.
Preferably, the connection 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 control instructions to the control module, and the control module sends out operation parameter information of the transformer through the wireless transmission module.
Preferably, 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 in parallel to the low-voltage winding.
Preferably, the transformation ratio fault module connects the medium voltage winding and the low voltage winding in series through a relay.
Preferably, the dielectric loss fault module forms a loop through a relay, a capacitor and a resistor, and the control module changes the internal connection mode of the loop to simulate a dielectric loss test.
Preferably, the control module is connected with an upper computer or a user terminal 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 terminal, the upper computer sends a control instruction through specific software, the software is an existing data communication algorithm, and as long as the data receiving, processing and sending can be achieved, a user can remotely carry out fault simulation test control on the transformer.
Preferably, a high-voltage capacitor of 15000pF-25000pF is connected to the high-voltage winding of the transformer in parallel, so that various insulation tests of large and medium-sized transformers of 110KV and above can be conveniently performed.
The invention has the advantages and positive effects that:
the three-winding transformer has the advantages that the high-voltage winding wiring group of the three-winding transformer is YN, the neutral point end is provided with the tap with the voltage regulating value of +/-2.5% or +/-5%, the terminals of the medium-voltage winding and the low-voltage winding are connected to the adapter plate to be connected in different transformation ratios and Y-type or triangle types, 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 core grounding fault module of the transformer can train various transformer test projects and various normal and abnormal states, meanwhile, the transformer can be switched between the normal state and the abnormal state randomly through the central centralized control platform, various real sites are restored to a great extent, the conventional systematic training of primary test students and the common fault analysis judgment of higher-level students of the power transformer test projects specified by national and electric power industry standards are met, the training of the transformer test is more flexible, the transformer test capability of electric overhaul workers is truly improved, and the training test cost is greatly reduced.
Drawings
FIG. 1 is a schematic diagram of the principle wiring 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 diagram of a transformer top layout of the present invention;
fig. 4 is a schematic diagram of the overall connection of the transformer of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein 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 herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Embodiments of the invention are described in further detail below with reference to the attached drawing figures:
the invention relates to an assembling method of a transformer fault simulation device, which comprises a transformer fault simulation device, wherein the transformer fault simulation device comprises a transformer shell, a high-voltage sleeve, a medium-voltage sleeve, a low-voltage sleeve and an iron core grounding sleeve are arranged on the transformer shell, a sealing door which is convenient for the transformer to enter is arranged on the high-voltage sleeve side of the transformer shell, 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 with the voltage of +/-2.5% or +/-5%, 12 terminals of the medium-voltage winding and the low-voltage winding are connected to an adapter plate and can be used as connection with different transformation ratios and Y shapes or triangle shapes, the wiring group of the high-voltage winding of the transformer is YN, the high-voltage winding of the transformer is connected with a high-voltage capacitor of 15000pF-25000pF in parallel, so that various insulation tests of large and medium transformers of 110KV and above are facilitated, the transformer comprises a control module, the control module is used for controlling winding conversion of the transformer to achieve different test functions and plays a role of master control, and 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 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 are controlled through the control module.
The assembling method of the transformer fault simulation device comprises the following steps:
s1, moving a high-voltage side of a transformer shell outwards, moving the transformer into the transformer shell, and filling an insulating part at the bottom of the transformer, so that a grounding point of an iron core of the transformer is grounded after passing through an iron core grounding sleeve of the transformer shell;
s2, connecting a 10KV winding of a transformer to a high-voltage sleeve of a transformer shell, connecting a 0.6KV winding of the transformer to a medium-voltage sleeve of the transformer shell, connecting a 0.4KV winding of the transformer to a low-voltage sleeve of the transformer shell, and connecting the transformer to an iron core grounding sleeve of the transformer shell;
s3, connecting a high-voltage capacitor and a discharge ball gap in parallel between the neutral point of the high-voltage winding of the transformer and the ground.
The function and constitution of each functional module are described 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 into different connection modes through the high-voltage relay, a high-voltage relay loop is connected in parallel on the low-voltage winding, the disconnection and the short circuit of the windings in the transformer loop are changed by changing the switching-on and switching-off states of the relay, and the resistance short-circuit state and the short-circuit state fault of the transformer are controlled to be realized;
the transformation ratio fault module is used for changing the connection mode of the windings through the relay to realize conversion over-tolerance of transformation ratio, and can set transformation ratio change or fault change of different connection modes;
the winding deformation fault module realizes the 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, can regulate three phases simultaneously, can regulate the three phases in a split phase manner, and realizes 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 the insulation problems of different conditions of the transformer are reflected in a voltage withstand test by changing the connection mode of elements in a loop through the control module, and the different phenomena are mainly reflected in different voltage withstand test voltages;
the dielectric loss fault module forms a loop through a relay, a capacitor and a resistor, the internal connection mode of the loop is changed through the control module, simulation of dielectric loss tests is realized, and the simulation of the damage of different degrees of insulation of the transformer under different conditions is divided into states of serious insulation damage, medium insulation damage, slight damp and the like, and the states are reflected in the results of the dielectric loss tests so as to be used for analysis and study by test staff;
the iron core grounding fault module is used for changing the insulation condition of the iron core to the ground by each resistor and other components in a relay control loop, wherein the iron core grounding fault module also comprises the states of serious insulation damage, moderate insulation damage, mild 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 be able to carry out the remote operation to the transformer, the control module is connected with a wireless transmission module, the wireless transmission module is used for transmitting and receiving wireless signals, a control instruction is sent to the control module remotely, and the control module sends out operation parameter information of the transformer through the wireless transmission module, the control module is connected with an upper computer or a user terminal through the wireless transmission module, the wireless transmission module carries out two-way transmission on data information among the control module, the upper computer and the user terminal, the control instruction is sent through specific software in the upper computer, the software is an existing data communication algorithm, as long as the data receiving, processing and sending can be achieved, a user can carry out fault simulation test control on the transformer remotely, and each functional module inside the transformer is controlled, so that the transformer can be switched between normal and abnormal states.
As shown in the connection schematic diagrams of fig. 1-4, A, B, C is a three-phase end of a 110KV transformer, 0 is a neutral point, am, bm, cm are three-phase ends of 35KV, and a, b, c are three-phase ends of 10 KV.
In specific implementation, the transformer fault simulation device can perform 11 transformer high-voltage test projects, including: the method comprises the steps of measuring the absorption ratio of the insulation resistance 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 clamping pieces, performing alternating current withstand voltage test of the transformer winding and the sleeve, measuring the direct current resistance of the winding and the sleeve, performing transformation ratio test, performing transformer winding deformation test, performing non-pure porcelain sleeve dielectric loss and capacitance measurement, performing non-pure porcelain sleeve end screen insulation resistance and dielectric loss measurement, and performing high-voltage core equalization of a power system, wherein each test item can be extended to 2-3 normal and abnormal test states, and the random switching of the total 30 normal and abnormal test states can clearly reflect the data change of the transformer under different fault conditions.
The three-winding transformer has the advantages that the high-voltage winding wiring group of the three-winding transformer is YN, the neutral point end is provided with the tap with the voltage regulating value of +/-2.5% or +/-5%, the terminals of the medium-voltage winding and the low-voltage winding are connected to the adapter plate to be connected in different transformation ratios and Y-type or triangle types, 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 core grounding fault module of the transformer can train various transformer test projects and various normal and abnormal states, meanwhile, the transformer can be switched between the normal state and the abnormal state randomly through the central centralized control platform, various real sites are restored to a great extent, the conventional systematic training of primary test students and the common fault analysis judgment of higher-level students of the power transformer test projects specified by national and electric power industry standards are met, the training of the transformer test is more flexible, the transformer test capability of electric overhaul workers is truly improved, and the training test cost is greatly reduced.
It should be emphasized that the examples described herein are illustrative rather than limiting, and therefore the invention is not limited to the examples described in the detailed description, but rather falls within the scope of the invention as defined by other embodiments derived from the technical solutions of the invention by those skilled in the art.
Claims (9)
1. The assembling method of the transformer fault simulation device is characterized by comprising the following steps of: including transformer fault analogue means, transformer fault analogue means includes the transformer shell, be equipped with high-voltage bushing, well voltage bushing, low-voltage bushing and iron core ground connection sleeve pipe on the transformer shell the sealing door that the transformer of being convenient for gets into has been seted up to the high-voltage bushing side of transformer shell, and the transformer is three-phase three-winding dry-type transformer, the transformer includes:
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 windings in a transformer loop by changing the on-off state of a relay, and controls the realization of 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 winding deformation faults of the transformer by changing electrical elements in a loop to realize three phases simultaneously or in split phases;
the alternating-current voltage withstand fault module is used for realizing voltage difference 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 condition of the transformer insulation with different degrees under different conditions;
the iron core grounding fault module is used for simulating insulation damage conditions of iron cores 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 withstand voltage fault module, the dielectric loss fault module and the iron core grounding fault module are connected to the control module, and 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 are controlled through the control module;
the assembling method of the transformer fault simulation device comprises the following steps:
s1, the high-voltage side of the transformer shell faces outwards, the transformer is moved into the transformer shell, and an insulating piece is filled at the bottom of the transformer, so that a grounding point of an iron core of the transformer is grounded after passing through an iron core grounding sleeve of the transformer shell;
s2, connecting a 10KV winding of the transformer to a high-voltage sleeve of the transformer shell, connecting a 0.6KV winding of the transformer to a medium-voltage sleeve of the transformer shell, connecting a 0.4KV winding of the transformer to a low-voltage sleeve of the transformer shell, and connecting the transformer to an iron core grounding sleeve of the transformer shell;
and S3, connecting a high-voltage capacitor and a discharge ball gap in parallel between the neutral point of the high-voltage winding of the transformer and the ground.
2. The method for assembling a transformer fault simulator of claim 1, wherein: the neutral point of the transformer is provided with taps for regulating the voltage by +/-2.5% or +/-5%.
3. The method for assembling a transformer fault simulator of claim 1, wherein: the wiring group of the high-voltage winding of the transformer is YN.
4. The method for assembling a 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, remotely sending control instructions to the control module, and sending operation parameter information of the transformer through the wireless transmission module.
5. The method for assembling a 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 in parallel to the low-voltage winding.
6. The method for assembling a transformer fault simulator of claim 1, wherein: the transformation ratio fault module connects the medium-voltage winding and the low-voltage winding in series through a relay.
7. The method for assembling a transformer fault simulator of claim 1, wherein: the dielectric loss fault module forms a loop through the relay, the capacitor and the resistor, and the internal connection mode of the loop is changed through the control module, so that simulation of a dielectric loss test is realized.
8. The method for assembling a transformer fault simulator of claim 4, wherein: the control module is connected with an upper computer or a user terminal 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 terminal.
9. The method for assembling a transformer fault simulator of claim 1, wherein: the high-voltage winding of the transformer is connected with a high-voltage capacitor of 15000pF-25000pF in parallel.
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| CN114113829A (en) | 2022-03-01 |
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