CN113759293A - Simulated power transformer for training and modeling method thereof - Google Patents
Simulated power transformer for training and modeling method thereof Download PDFInfo
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- 238000012549 training Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000004088 simulation Methods 0.000 claims abstract description 82
- 230000007935 neutral effect Effects 0.000 claims abstract description 31
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000004804 winding Methods 0.000 claims description 123
- 238000012360 testing method Methods 0.000 claims description 66
- 230000009466 transformation Effects 0.000 claims description 30
- 238000005259 measurement Methods 0.000 claims description 27
- 238000009413 insulation Methods 0.000 claims description 25
- 229910052573 porcelain Inorganic materials 0.000 claims description 11
- 239000003990 capacitor Substances 0.000 claims description 10
- 230000002159 abnormal effect Effects 0.000 claims description 7
- 238000002474 experimental method Methods 0.000 claims description 7
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 3
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- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 8
- 239000000919 ceramic Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000009429 electrical wiring Methods 0.000 description 2
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- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000009666 routine test Methods 0.000 description 2
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- 238000007792 addition Methods 0.000 description 1
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- 238000012423 maintenance Methods 0.000 description 1
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- G—PHYSICS
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- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/62—Testing of transformers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- G—PHYSICS
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Abstract
The invention relates to a training simulation power transformer and a modeling method thereof, and belongs to the field of power equipment. The invention comprises an android host, a simulation transformer body and a simulation transformer body shell, wherein the android host and the simulation transformer body are connected in a Bluetooth or wireless manner, the simulation transformer body is arranged in the simulation transformer body shell, the simulation transformer body comprises a controller and a circuit breaker module, and the structure is characterized in that: the simulation transformer body further comprises a dry-type transformer and a compensation module, the controller is connected with the breaker module, the breaker module is connected with the dry-type transformer, the dry-type transformer is connected with the compensation module, and a transformer sleeve is arranged on the shell of the simulation transformer body. The transformer bushing comprises A, B and C bushings with the voltage of 110kV, O, Am, Bm and Cm bushings with the voltage of 35kV, wherein the O bushings are neutral point bushings, a, b, C and O bushings with the voltage of 10kV and iron core grounding bushings.
Description
Technical Field
The invention relates to a training simulation power transformer and a modeling method thereof, and belongs to the field of power equipment.
Background
The power transformer is a main primary device of a power grid system and is very critical to stable and reliable operation of the power grid.
In order to ensure reliable and fault-free operation of equipment such as a power transformer and the like, a maintenance department of a power company can cut off power of the transformer and perform routine tests, the test projects are various, the power cut time is short, and testers can be skilled, professional and accurate to test the transformer according to the power industry standard and the test specification.
At present, the requirement on power failure is very strict, and the problem of failure is difficult to emerge and the problem is provided for maintainers of an electric power department to analyze and improve skills, in particular to new employees who enter the office. The power department urgently needs a transformer to simulate various performance parameters of a power transformer in high fidelity, and meanwhile needs to meet the requirement for simulating fault types, training personnel, analyzing faults and the like, so that the transformer has a very positive effect on the skill improvement and the power supply protection capability improvement of testers.
One 110kV power transformer has the value of hundreds of thousands and is very large in size, ten transformer samples are needed to simulate a test project with dozens of fault types, a large-area working site is occupied, and huge economic pressure and site pressure are brought to a training unit.
In view of this, patent document No. 201711321099.5 discloses a modeling method and system for a low-frequency model in an electromagnetic transient state of a three-phase transformer, and the comparison document is different from the implementation manner of the present application.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a training simulation power transformer with a reasonable structural design and a modeling method thereof.
The technical scheme adopted by the invention for solving the problems is as follows: this training is with simulation power transformer, including tall and erect host computer of ann, simulation transformer body and simulation transformer body shell, tall and erect host computer of ann adopts bluetooth or wireless connection with the simulation transformer body, the simulation transformer body is installed in simulation transformer body shell, the simulation transformer body includes controller and circuit breaker module, and its structural feature lies in: the simulation transformer body further comprises a dry-type transformer and a compensation module, the controller is connected with the breaker module, the breaker module is connected with the dry-type transformer, the dry-type transformer is connected with the compensation module, and a transformer sleeve is arranged on the shell of the simulation transformer body.
Further, the transformer bushing comprises A, B and C bushings with the voltage of 110kV, O, Am, Bm and Cm bushings with the voltage of 35kV, wherein the O bushings are neutral point bushings, a, b, C and O bushings with the voltage of 10kV and core grounding bushings.
Further, the dry-type transformer is a customized 110kV three-phase three-winding dry-type transformer, and the rated voltage: 10kV/0.6kV/0.4kV, the parameters are rated voltages of high voltage, medium voltage and low voltage respectively, the high-voltage winding wiring group is YN, the neutral point end is provided with a tap for regulating the voltage by +/-2 multiplied by 2.5 percent or +/-5 percent, and 12 terminals of a 0.6kV (medium voltage) winding and a 0.4kV (low voltage) winding are connected to a circuit breaker module, so that tests of different transformation ratios and Y or delta connection groups are conveniently carried out.
Furthermore, the compensation module is shown in a figure 4 and mainly comprises a resistor, a capacitor and a discharge ball gap, wherein the 15000 pF-25000 pF high-voltage capacitor, the 150 Momega high-voltage resistor and the 30kV discharge ball gap are connected between the neutral point of the high-voltage winding of the dry-type transformer and the ground, so that the capacitance of the insulating medium of the large and medium-sized transformer is simulated, and various insulation tests of the large and medium-sized transformer with the voltage of 110kV or more can be conveniently carried out.
Furthermore, the compensation module is used for compensating the parameter difference between the 10kV dry-type transformer and the 110kV dry-type transformer, so that the parameters of the simulation transformer body are closer to reality.
Furthermore, the shell of the simulated transformer body can be flexibly designed according to the training site conditions, and the shell size of the 110kV dry-type transformer (the reference size of length multiplied by width multiplied by height is 3.2m multiplied by 2.4m multiplied by 1.8 m) is provided with corresponding transformer sleeves of 110kV (high voltage), 35kV (medium voltage), 10kV (low voltage) and iron core grounding.
Furthermore, considering that high voltage is applied in the simulation power transformer test, the internal high-voltage electric field has potential safety hazard to external training personnel, so the shell of the simulation transformer body needs to be made of metal material, or a layer of conductive cloth or a compact metal mesh material is additionally arranged in the simulation transformer body to be used as a grounding shield, so that the personal safety of instructors and training personnel is ensured.
Further, another technical object of the present invention is to provide a modeling method of a simulated power transformer for training.
The technical purpose of the invention is realized by the following technical scheme.
A modeling method of a simulated power transformer for training is characterized by comprising the following steps: the modeling method comprises the following steps:
an electrical wiring diagram of internal modeling of a 110kV simulation transformer in a normal state is shown in a figure 2, after a simulation transformer body shell is in place (a high-voltage side faces outwards), a dry type transformer is moved into the simulation transformer body shell, an insulating part is filled at the bottom of the dry type transformer, an iron core grounding point of the dry type transformer is conveniently grounded through a transformer bushing of which the iron core is grounded, all transformer bushings are installed on the simulation transformer body shell, a 10kV winding of the dry type transformer is connected to a transformer bushing of a 110kV high voltage, and a winding neutral point of the dry type transformer is connected to a transformer bushing of a high-voltage neutral point; a 0.6kV winding of the dry type transformer is connected to a 35kV medium-voltage transformer sleeve; the 0.4kV winding of the dry type transformer is connected to a transformer sleeve of 10kV low voltage, the neutral point of the winding is connected to the transformer sleeve of a low-voltage neutral point, the ground of the dry type transformer is connected to the transformer sleeve of the iron core, and finally, the compensation module is connected in parallel between the neutral point of the high-voltage winding of the dry type transformer and the ground.
Further, it is still another technical object of the present invention to provide a test item based on a modeling method.
The technical purpose of the invention is realized by the following technical scheme.
A test project based on a modeling method is characterized in that: the test items are as follows:
the method comprises the following steps of (I) simulating measurement of insulation resistance and absorption ratio of a winding of a transformer body and a transformer bushing;
secondly, simulating direct current leakage current measurement of a winding of the transformer body and a transformer bushing;
thirdly, simulating dielectric loss and capacitance measurement of the winding of the transformer body and the transformer bushing;
(IV) measuring the insulation resistance of the iron core clamp;
simulating an alternating current withstand voltage test of a winding of the transformer body and a transformer bushing;
sixthly, simulating the direct current resistance measurement of the winding of the transformer body and the transformer bushing;
(VII) carrying out a transformation ratio test;
(eighth), simulating a winding deformation test of the transformer body;
measuring dielectric loss and capacitance of the transformer bushing made of non-pure porcelain;
measuring the insulation resistance and dielectric loss of the end screen of the transformer bushing made of non-pure porcelain;
and eleventh, high-voltage nuclear phase of the power system.
And training a plurality of high-voltage tests, and performing fault simulation and fault analysis and judgment.
Furthermore, the measurement and implementation of the tests (i), (ii) and (iii) are realized by changing the resistance between the neutral point of the high-voltage winding and the ground through the high-voltage switch K16, and in a normal state, as shown in fig. 4, closing the high-voltage switch K16 changes the insulation resistance, the absorption ratio, the direct-current leakage current and the dielectric loss of the analog transformer body, and the resistance in the compensation module is calculated during theoretical calculation, so that a plurality of switches can be used together with a plurality of resistances to realize multi-level setting as required.
Further, the insulation resistance measurement of the test (four) core clamp is realized by changing the resistance between the core and the ground, and in a normal state, as shown in fig. 6, after the android host sends a command of core insulation abnormity, K18 is closed, so that the resistance abnormity between the core and the ground is realized.
Further, in the alternating current voltage withstand test of the winding of the simulation transformer body and the transformer bushing, the limitation on the upper limit of voltage is realized by connecting the discharge ball gap between the neutral point of the high-voltage winding and the ground, in a normal state, as shown in fig. 5, after the android host machine sends out an alternating current voltage withstand abnormal instruction, the K20 is closed, and the discharge ball gap with lower voltage withstand level is connected in parallel beside the compensation module, so that the voltage withstand reduction is realized.
Further, the test (six) simulates that the winding of the transformer body and the direct current resistance of the transformer bushing are measured to change the winding resistance through one item of open circuit and short circuit medium voltage winding, the normal state is shown in fig. 5, for example, Am and Cm windings are short-circuited, K7 is normally open, K4 is normally closed to be in the normal state, after the android host sends out a direct current resistance short circuit fault instruction, K7 is closed, and an instrument is used for measuring the direct current resistance, so that the Am and Cm resistances are greatly reduced, and the resistance between the other two items is slightly reduced;
further, in the test (seventh) of the transformation ratio test, the low-voltage winding and the medium-voltage winding are connected to act as a normal state, namely K1, in order to prevent the medium-voltage winding from being connected mistakenly, the low-voltage winding and the medium-voltage winding are correspondingly connected to act as K2 in the transformation ratio test, the transformation ratio is 10:1 in the normal state, the low-voltage winding of one item is short-circuited to realize the change of the turn ratio, as shown in fig. 5, taking the phase a as an example, the transformation ratio is 10 when the 0.6kV and the 0.4kV windings are connected in series in the normal state, the subsequent electric appliance K10 acts when the transformation ratio is 16.67 when the android host sends out an abnormal transformation ratio instruction, and the other two transformation ratios are not changed.
In the experiment (eight), winding faults in the winding deformation experiment of the simulated transformer body are mainly divided into short circuit and open circuit, the normal state and the short circuit state are the same as the transformation ratio experiment, and the open circuit state taking the phase A as an example in fig. 5 is to disconnect the low-voltage winding, namely, the K4 action.
Furthermore, in the tests (nine) and (ten), the high-voltage capacitor of 15000 pF-18000 pF is connected in parallel with the high-voltage winding of the simulation transformer body, so that the capacitance of the high-voltage winding of the large and medium-sized transformer to the middle and low-voltage windings and the ground is simulated, the dielectric loss and capacitance measurement of the non-pure-porcelain transformer bushing and the insulation resistance and dielectric loss measurement of the end screen of the non-pure-porcelain transformer bushing are facilitated.
Further, in the test (eleven), the high-voltage nuclear phase is tested, the medium-voltage winding is in a delta connection group, the low-voltage winding and the high-voltage winding are in a Y connection group, and corresponding winding wires are led out to form nuclear phase tests of different connection groups.
Compared with the prior art, the invention has the following advantages:
(1) the simulation power transformer designed by the invention simulates various characteristic parameters and fault types of a 110kV power transformer through an android host, a controller, a breaker module, a 10kV dry type transformer and other components (a schematic diagram is shown in figure 1) to complete eleven routine test projects, and has the advantages of low cost, small occupied area and great convenience due to the conventional systematic training of primary test students and the common fault analysis and judgment of higher-level students of the power transformer test projects specified by the power industry standards.
(2) The android host deploys developed visual apps, a control mode and a modeling flow of each test project are prefabricated, and the android host is connected with a controller through BLE Bluetooth (or other wireless devices such as wifi) to centrally control the circuit breaker module; the visual app can simulate the state of the transformer in real time, and students can see the fault state of the transformer clearly.
(3) The invention can complete a plurality of special test projects; after a 110kV capacitive sleeve is installed on the high-voltage side of the analog transformer, the analog transformer can be used for dielectric loss test of a non-pure porcelain sleeve of the transformer, and is a training project which is impossible for a general training institution; the iron core is grounded through the grounding sleeve, so that the measurement of the insulation resistance of the iron core and the clamping piece of the large and medium-sized transformer can be simulated, and the training program which cannot be completed by a common training mechanism is also provided.
Drawings
Fig. 1 is a schematic design diagram of a training simulation power transformer according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of electrical connections for training simulation of the normal state of a power transformer according to an embodiment of the present invention.
Fig. 3 is a top layout view of a simulated transformer body enclosure of an embodiment of the invention.
Fig. 4 is a schematic structural diagram of a compensation module according to an embodiment of the invention.
Fig. 5 is a diagram of the actual connection of the training simulation power transformer according to the embodiment of the invention.
Fig. 6 is a circuit diagram of a connection circuit of a core clamp according to an embodiment of the invention.
In the figure: tall and erect host computer 1 of ann, simulation transformer body 2, controller 3, circuit breaker module 4, dry-type transformer 5, compensation module 6, transformer bushing 7, simulation transformer body shell 8, high voltage resistor 9, high voltage capacitor 10, discharge ball clearance 11.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Examples are given.
Referring to fig. 1 to 6, it should be understood that the structures, ratios, sizes, and the like shown in the drawings attached to the present specification are only used for matching the disclosure of the present specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the function and the achievable purpose of the present invention. In the present specification, the terms "upper", "lower", "left", "right", "middle" and "one" are used for clarity of description, and are not used to limit the scope of the present invention, and the relative relationship between the terms and the relative positions may be changed or adjusted without substantial technical changes.
In this embodiment, training is with simulation power transformer, including tall and erect host computer 1 of ann, simulation transformer body 2 and simulation transformer body shell 8, tall and erect host computer 1 of ann and adopt bluetooth or wireless connection with simulation transformer body 2, simulation transformer body 2 installs in simulation transformer body shell 8.
The simulation transformer body 2 in the embodiment comprises a controller 3, a breaker module 4, a dry-type transformer 5 and a compensation module 6, wherein the controller 3 is connected with the breaker module 4, the breaker module 4 is connected with the dry-type transformer 5, the dry-type transformer 5 is connected with the compensation module 6, and a transformer sleeve 7 is arranged on a shell 8 of the simulation transformer body; the transformer bushing 7 comprises A, B and C bushings with the voltage of 110kV, O, Am, Bm and Cm bushings with the voltage of 35kV, wherein the O bushings are neutral point bushings, a, b, C and O bushings with the voltage of 10kV and iron core grounding bushings.
The dry-type transformer 5 in this embodiment is a customized 110kV three-phase three-winding dry-type transformer 5, rated voltage: 10kV/0.6kV/0.4kV, the parameters are rated voltages of high voltage, medium voltage and low voltage respectively, the high-voltage winding wiring group is YN, the neutral point end is provided with a tap for regulating the voltage by +/-2 multiplied by 2.5 percent or +/-5 percent, and 12 terminals of a 0.6kV (medium voltage) winding and a 0.4kV (low voltage) winding are connected to the circuit breaker module 4, so that tests of different transformation ratios and Y or delta connection groups can be conveniently carried out.
The compensating module 6 in this embodiment is shown in fig. 4, and mainly comprises a resistor 9, a capacitor 10 and a discharging ball gap 11, wherein the 15000 pF-25000 pF high-voltage capacitor 10, the 150 mq high-voltage resistor 9 and the 30kV discharging ball gap 11 are connected between the neutral point of the high-voltage winding of the dry-type transformer 5 and the ground, so as to simulate the capacitance of the insulating medium of the large and medium-sized transformer, and facilitate various insulation tests of the large and medium-sized transformer of 110kV and above; and the compensation module 6 is used for compensating the parameter difference between the 10kV dry-type transformer 5 and the 110kV dry-type transformer 5 so as to enable the parameters of the simulation transformer body 2 to be closer to reality.
The simulated transformer body housing 8 in this embodiment can flexibly design the housing size of the 110kV dry transformer 5 (the reference size of length × width × height is 3.2 × 2.4 × 1.8 m) according to the training site conditions, and is equipped with the corresponding transformer bushings 7 of 110kV (high voltage), 35kV (medium voltage), 10kV (low voltage) and core grounding.
In this embodiment, considering that high voltage is applied in the simulation power transformer test, and the internal high voltage electric field may have potential safety hazard to external training personnel, the shell 8 of the simulation transformer body needs to be made of a metal material, or a layer of conductive cloth or a compact metal mesh material is additionally installed inside the shell to be used as a ground shield, so as to ensure the personal safety of instructors and training personnel.
In this embodiment, a modeling method of a training simulation power transformer includes: an electrical wiring diagram of internal modeling of a 110kV simulation transformer in a normal state is shown in a figure 2, after a simulation transformer body shell 8 is in place (a high-voltage side faces outwards), a dry-type transformer 5 is moved into the simulation transformer body shell 8, an insulating part is filled at the bottom of the dry-type transformer 5, so that an iron core grounding point of the dry-type transformer 5 is conveniently grounded through a transformer sleeve 7 with an iron core grounded, all transformer sleeves 7 are installed on the simulation transformer body shell 8, a 10kV winding of the dry-type transformer 5 is connected to the transformer sleeve 7 with a 110kV high voltage, and a winding neutral point of the dry-type transformer 5 is connected to the transformer sleeve 7 with a high-voltage neutral point; the 0.6kV winding of the dry type transformer 5 is connected to a 35kV medium-voltage transformer bushing 7; the 0.4kV winding of the dry type transformer 5 is connected to a transformer bushing 7 of 10kV low voltage, the neutral point of the winding is connected to the transformer bushing 7 of the low voltage neutral point, the grounding of the dry type transformer 5 is connected to the transformer bushing 7 of the iron core grounding, and finally, the compensation module 6 is connected in parallel between the neutral point of the high voltage winding of the dry type transformer 5 and the ground.
The experimental items based on the modeling method in this example are as follows:
simulating the measurement of the insulation resistance and the absorption ratio of the winding of the transformer body 2 and the transformer bushing 7;
simulating the direct current leakage current measurement of the winding of the transformer body 2 and the transformer bushing 7;
thirdly, simulating dielectric loss and capacitance measurement of the winding of the transformer body 2 and the transformer bushing 7;
(IV) measuring the insulation resistance of the iron core clamp;
simulating an alternating current withstand voltage test of the winding of the transformer body 2 and the transformer bushing 7;
simulating the direct current resistance measurement of the winding of the transformer body 2 and the transformer bushing 7;
(VII) carrying out a transformation ratio test;
(eighth), simulating a winding deformation test of the transformer body 2;
measuring dielectric loss and capacitance of the transformer bushing 7 made of non-pure porcelain;
measuring the insulation resistance and dielectric loss of the end screen of the transformer bushing 7 made of non-pure porcelain;
and eleventh, high-voltage nuclear phase of the power system.
And training a plurality of high-voltage tests, and performing fault simulation and fault analysis and judgment.
The measurement and implementation of the tests (i), (ii) and (iii) are realized by changing the resistance between the neutral point of the high-voltage winding and the ground through the high-voltage switch K16, the normal state is as shown in fig. 4, the insulation resistance, the absorption ratio, the direct-current leakage current and the dielectric loss of the analog transformer body 2 are changed by closing the high-voltage switch K16, the resistance in the compensation module 6 is calculated during theoretical calculation, and a plurality of switches and a plurality of resistances are matched as required to realize multi-stage setting.
The insulation resistance measurement of the test (four) core clamp is realized by changing the resistance between the core and the ground, and in a normal state, as shown in fig. 6, after the android main machine 1 sends a command of core insulation abnormity, K18 is closed, so that the resistance abnormity between the core and the ground is realized.
In the alternating-current voltage withstand test of the winding of the simulation transformer body 2 and the transformer bushing 7, the upper limit of the voltage is limited by connecting the discharge ball gap 11 between the neutral point of the high-voltage winding and the ground, in a normal state, as shown in fig. 5, after the android main machine 1 sends out an alternating-current voltage withstand abnormal instruction, the K20 is closed, and the discharge ball gap 11 with a lower voltage withstand level is connected beside the compensation module 6 in parallel, so that the voltage withstand reduction is realized.
The winding of the test (six) simulation transformer body 2 and the direct current resistance measurement of the transformer bushing 7 change the winding resistance through a certain item of open circuit and short circuit medium-voltage winding, the normal state is as shown in fig. 5, the Am and Cm winding short circuit is taken as an example, the K7 normally open K4 normally closed is in the normal state, the K7 is closed after the android main machine 1 sends out a direct current resistance short circuit fault instruction, the direct current resistance is measured by using an instrument, the Am and Cm resistances are found to be greatly reduced, and the resistance between the rest two items is reduced in a small amplitude.
In the test (seventh) of the transformation ratio, the low-voltage winding and the medium-voltage winding are connected to act as a normal state, namely K1, in order to prevent the medium-voltage winding from being misconnected, the low-voltage winding and the medium-voltage winding are correspondingly connected in the transformation ratio test, namely K2 acts, the transformation ratio is 10:1 in the normal state, the low-voltage winding of one item is short-circuited to realize the change of the turn ratio, as shown in fig. 5, the phase a is taken as an example, the transformation ratio is 10 when the 0.6kV and the 0.4kV windings are connected in series in the normal state, the transformation ratio is 16.67 when the android host 1 sends out a transformation ratio abnormal instruction, and the subsequent electric appliance K10 acts, and the other two transformation ratios are not changed.
In the winding deformation experiment of the simulated transformer body 2 in the test (eight), the winding faults are mainly divided into short circuit and open circuit, the normal state and the short circuit state are the same as the transformation ratio experiment, and the open circuit state taking the phase a as an example in fig. 5 is to disconnect the low-voltage winding, namely, the K4 action.
In the tests (nine) and (ten), the high-voltage capacitor 10 with 15000pF to 18000pF is connected in parallel to the high-voltage winding of the simulation transformer body 2 to simulate the capacitance of the high-voltage winding of the large and medium-sized transformer to the middle and low-voltage windings and the ground, so that dielectric loss and capacitance measurement of the non-pure-ceramic transformer bushing 7 and end screen insulation resistance and dielectric loss measurement of the non-pure-ceramic transformer bushing 7 are facilitated.
In the test (eleven), the high-voltage nuclear phase is tested, the medium-voltage winding is in a delta connection group, the low-voltage winding and the high-voltage winding are in a Y connection group, and the corresponding winding connection wires are led out to form nuclear phase tests of different connection groups.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an illustration of the structure of the present invention. Equivalent or simple changes in the structure, characteristics and principles of the invention are included in the protection scope of the patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (10)
1. The utility model provides a training is with simulation power transformer, includes tall and erect host computer of ann (1), simulation transformer body (2) and simulation transformer body shell (8), tall and erect host computer of ann (1) and adopt bluetooth or wireless connection with simulation transformer body (2), install in simulation transformer body shell (8) simulation transformer body (2), simulation transformer body (2) include controller (3) and circuit breaker module (4), its characterized in that: the simulation transformer body (2) further comprises a dry-type transformer (5) and a compensation module (6), the controller (3) is connected with the breaker module (4), the breaker module (4) is connected with the dry-type transformer (5), the dry-type transformer (5) is connected with the compensation module (6), and a transformer sleeve (7) is arranged on the simulation transformer body shell (8).
2. The training simulation power transformer of claim 1, wherein: the transformer bushing (7) comprises A, B and C bushings with the voltage of 110kV, O, Am, Bm and Cm bushings with the voltage of 35kV, wherein the O bushings are neutral point bushings, a, b, C and O bushings with the voltage of 10kV and iron core grounding bushings.
3. The training simulation power transformer of claim 1, wherein: the dry-type transformer (5) is a customized 110kV three-phase three-winding dry-type transformer (5), and the rated voltage is as follows: 10kV/0.6kV/0.4kV, the parameters are rated voltages of high voltage, medium voltage and low voltage respectively, the high-voltage winding wiring group is YN, the neutral point end is provided with a tap for regulating the voltage +/-2 multiplied by 2.5% or +/-5%, and 12 terminals of the 0.6kV winding and the 0.4kV winding are connected to the circuit breaker module (4), so that tests of different transformation ratios and Y or delta connection groups can be conveniently carried out.
4. The training simulation power transformer of claim 1, wherein: the compensation module (6) comprises a resistor (9), a capacitor (10) and a discharge ball gap (11), wherein the high-voltage capacitor (10) with the frequency of 15000 pF-25000 pF, the high-voltage resistor (9) with the frequency of 150M omega and the discharge ball gap (11) with the voltage of 30kV are connected between the neutral point of a high-voltage winding of the dry-type transformer (5) and the ground, so that the capacitance of an insulating medium of the large and medium-sized transformer is simulated, and various insulation tests of the large and medium-sized transformer with the voltage of 110kV and above are facilitated.
5. The training simulation power transformer of claim 1, wherein: the compensation module (6) is used for compensating the parameter difference between the 10kV dry-type transformer (5) and the 110kV dry-type transformer (5) so as to enable the parameters of the simulation transformer body (2) to be closer to reality.
6. The training simulation power transformer of claim 1, wherein: the shell (8) of the simulation transformer body can flexibly design the shell size of the 110kV dry type transformer (5) according to the training site conditions, and is provided with corresponding transformer sleeves (7) of 110kV, 35kV and 10kV and iron core grounding.
7. The training simulation power transformer of claim 1, wherein: considering that high voltage is applied in a simulation power transformer test, an internal high-voltage electric field has potential safety hazards to external training personnel, so that a shell (8) of a simulation transformer body needs to be made of a metal material, or a layer of conductive cloth or a tight metal mesh material is additionally arranged in the simulation transformer body to be used as a grounding shield, so that the personal safety of instructors and training personnel is ensured.
8. A modeling method of a training simulation power transformer according to any one of claims 1 to 7, characterized in that: the modeling method comprises the following steps:
after the simulation transformer body shell (8) is in place, the dry type transformer (5) is moved into the simulation transformer body shell (8), an insulating part is filled at the bottom of the dry type transformer (5), so that an iron core grounding point of the dry type transformer (5) is conveniently grounded through a transformer bushing (7) with an iron core grounded, all transformer bushings (7) are installed on the simulation transformer body shell (8), a 10kV winding of the dry type transformer (5) is connected to the transformer bushing (7) with a 110kV high voltage, and a winding neutral point of the dry type transformer (5) is connected to the transformer bushing (7) with a high voltage neutral point; a 0.6kV winding of the dry-type transformer (5) is connected to a 35kV medium-voltage transformer sleeve (7); the 0.4kV winding of the dry-type transformer (5) is connected to a transformer bushing (7) of 10kV low voltage, the neutral point of the winding is connected to the transformer bushing (7) of a low-voltage neutral point, the ground of the dry-type transformer (5) is connected to the transformer bushing (7) of which the iron core is grounded, and finally, the compensation module (6) is connected in parallel between the neutral point of the high-voltage winding of the dry-type transformer (5) and the ground.
9. A test project based on the modeling method of claim 8, characterized in that: the test items are as follows:
the method comprises the following steps of (I) simulating measurement of insulation resistance and absorption ratio of a winding of a transformer body (2) and a transformer bushing (7);
secondly, simulating the direct current leakage current measurement of the winding of the transformer body (2) and the transformer bushing (7);
thirdly, simulating dielectric loss and capacitance measurement of the winding of the transformer body (2) and the transformer bushing (7);
(IV) measuring the insulation resistance of the iron core clamp;
simulating an alternating current withstand voltage test of a winding of the transformer body (2) and the transformer bushing (7);
sixthly, simulating the direct current resistance measurement of the winding of the transformer body (2) and the transformer bushing (7);
(VII) carrying out a transformation ratio test;
(eighth), simulating a winding deformation test of the transformer body (2);
measuring dielectric loss and capacitance of the transformer bushing (7) made of non-pure porcelain;
measuring the insulation resistance and dielectric loss of the end screen of the non-pure porcelain transformer bushing (7);
and eleventh, high-voltage nuclear phase of the power system.
10. A test item of a modeling method according to claim 9, characterized in that:
the measurement and implementation of the tests (I), (II) and (III) are realized by changing the resistance between the neutral point of the high-voltage winding and the ground through the high-voltage switch K16, the insulation resistance, the absorption ratio, the direct current leakage current and the dielectric loss of the analog transformer body (2) are changed by closing the high-voltage switch K16, the resistance in the compensation module (6) is calculated in theoretical calculation, and a plurality of switches can be matched with a plurality of resistances to realize multi-level setting as required;
the insulation resistance measurement of the iron core clamp in the test (IV) is realized by changing the resistance between the iron core and the ground, and K18 is closed after the android host (1) sends an iron core insulation abnormity instruction, so that the resistance between the iron core and the ground is abnormal;
in the test (V), the alternating-current voltage withstand test for simulating the winding of the transformer body (2) and the transformer bushing (7) realizes the limitation of the upper limit of voltage by connecting the discharge ball gap (11) between the neutral point of the high-voltage winding and the ground, after the android host (1) sends an alternating-current voltage withstand abnormal instruction, K20 is closed, and the discharge ball gap (11) with lower voltage withstand level is connected in parallel beside the compensation module (6), so that the voltage withstand reduction is realized;
the six-step test simulates that the direct current resistance measurement of the winding of the transformer body (2) and the transformer bushing (7) changes the winding resistance through one item of open circuit and short circuit medium-voltage winding, taking Am and Cm winding short circuit as an example, K7 normally open K4 normally closed to be in a normal state, K7 is closed after the android host (1) sends out a direct current resistance short circuit fault instruction, and the direct current resistance is measured by using an instrument, so that the Am and Cm resistances are greatly reduced, and the resistance between the other two items is slightly reduced;
in the test (VII), a transformation ratio test is carried out, namely, a low-voltage winding and a medium-voltage winding are connected to act as a normal state, namely, K1, in order to prevent the medium-voltage winding from being misconnected, the low-voltage winding and the medium-voltage winding are correspondingly connected in the transformation ratio test, namely, K2 acts, the transformation ratio is 10:1 in the normal state, the low-voltage winding of one item is short-circuited to realize the change of the turn ratio, the A phase is taken as an example, the 0.6kV and 0.4kV windings are connected in series in the normal state, the transformation ratio is 10, an android host (1) sends out a transformation ratio abnormal command, and then, the K10 acts, the transformation ratio is 16.67, and the other two transformation ratios are not changed;
in the winding deformation experiment of the simulated transformer body (2), the winding faults are mainly divided into short circuit and open circuit, the normal state and the short circuit state are the same as those of the transformation ratio experiment, and the open circuit state taking the phase A as an example is to disconnect the low-voltage winding, namely K4 action;
in the tests (nine) and (ten), a high-voltage capacitor (10) with 15000 pF-18000 pF is connected in parallel to a high-voltage winding of the simulation transformer body (2) to simulate the capacitance of the high-voltage winding of the large and medium-sized transformer in the middle and low voltage windings and the ground, so that dielectric loss and capacitance measurement of the non-pure-porcelain transformer bushing (7) and measurement of the end screen insulation resistance and dielectric loss of the non-pure-porcelain transformer bushing (7) are facilitated;
and (eleven) high-voltage nuclear phase tests are carried out, wherein the medium-voltage winding is in a delta connection group, the low-voltage winding and the high-voltage winding are in a Y connection group, and the corresponding winding connection wires are led out to form nuclear phase tests of different connection groups.
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU6810400A (en) * | 1999-09-02 | 2001-04-10 | Transgrid | Partial discharge monitoring system for transformers |
| CN101419266A (en) * | 2008-12-01 | 2009-04-29 | 中国电力科学研究院 | Dynamic analog method for extra-high voltage transformer |
| CN102520310A (en) * | 2012-01-10 | 2012-06-27 | 广东电网公司电力科学研究院 | System for positioning turn-to-turn insulation defect of dry air-core reactor |
| CN202600100U (en) * | 2012-03-16 | 2012-12-12 | 甘肃电力科学研究院 | On-line monitoring device of high-voltage transformer bushing tap grounding |
| CN203249977U (en) * | 2013-06-03 | 2013-10-23 | 国家电网公司 | Bushing-based transformer on-line monitoring system |
| CN104502762A (en) * | 2014-12-19 | 2015-04-08 | 广东电网有限责任公司电力科学研究院 | Data validity detection device for transformer bushing monitoring system |
| JP2015165186A (en) * | 2014-02-28 | 2015-09-17 | 株式会社村田製作所 | Capacitor module testing device and capacitor module testing method |
| CN204904708U (en) * | 2015-08-22 | 2015-12-23 | 国家电网公司 | Transformer body and sleeve pipe simulated failure device |
| CN106448377A (en) * | 2016-09-28 | 2017-02-22 | 国家电网公司 | Dynamical simulator for abnormal structure change fault of transformer |
| CN107271945A (en) * | 2017-06-26 | 2017-10-20 | 国家电网公司 | A kind of system-level electronic mutual inductor EMC test system and method |
| CN107527541A (en) * | 2017-09-30 | 2017-12-29 | 咸亨国际（杭州）电气制造有限公司 | A kind of cable fault emulation centralized control system and emulation training method |
| CN109932586A (en) * | 2018-09-28 | 2019-06-25 | 国网陕西省电力公司电力科学研究院 | Mutual inductor Electro Magnetic Compatibility detection device and method based on solid-state switch control |
| CN111551875A (en) * | 2019-06-05 | 2020-08-18 | 广西电网有限责任公司柳州供电局 | Fault simulation system of multi-state transformer |
-
2021
- 2021-09-01 CN CN202111021593.6A patent/CN113759293A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU6810400A (en) * | 1999-09-02 | 2001-04-10 | Transgrid | Partial discharge monitoring system for transformers |
| CN101419266A (en) * | 2008-12-01 | 2009-04-29 | 中国电力科学研究院 | Dynamic analog method for extra-high voltage transformer |
| CN102520310A (en) * | 2012-01-10 | 2012-06-27 | 广东电网公司电力科学研究院 | System for positioning turn-to-turn insulation defect of dry air-core reactor |
| CN202600100U (en) * | 2012-03-16 | 2012-12-12 | 甘肃电力科学研究院 | On-line monitoring device of high-voltage transformer bushing tap grounding |
| CN203249977U (en) * | 2013-06-03 | 2013-10-23 | 国家电网公司 | Bushing-based transformer on-line monitoring system |
| JP2015165186A (en) * | 2014-02-28 | 2015-09-17 | 株式会社村田製作所 | Capacitor module testing device and capacitor module testing method |
| CN104502762A (en) * | 2014-12-19 | 2015-04-08 | 广东电网有限责任公司电力科学研究院 | Data validity detection device for transformer bushing monitoring system |
| CN204904708U (en) * | 2015-08-22 | 2015-12-23 | 国家电网公司 | Transformer body and sleeve pipe simulated failure device |
| CN106448377A (en) * | 2016-09-28 | 2017-02-22 | 国家电网公司 | Dynamical simulator for abnormal structure change fault of transformer |
| CN107271945A (en) * | 2017-06-26 | 2017-10-20 | 国家电网公司 | A kind of system-level electronic mutual inductor EMC test system and method |
| CN107527541A (en) * | 2017-09-30 | 2017-12-29 | 咸亨国际（杭州）电气制造有限公司 | A kind of cable fault emulation centralized control system and emulation training method |
| CN109932586A (en) * | 2018-09-28 | 2019-06-25 | 国网陕西省电力公司电力科学研究院 | Mutual inductor Electro Magnetic Compatibility detection device and method based on solid-state switch control |
| CN111551875A (en) * | 2019-06-05 | 2020-08-18 | 广西电网有限责任公司柳州供电局 | Fault simulation system of multi-state transformer |
Non-Patent Citations (2)
| Title |
|---|
| M. ZHANG ET AL.: "Cooperative Operation of DG Inverters and a RIHAF for Power Quality Improvement in an Integrated Transformer-Structured Grid-Connected Microgrid", EEE TRANSACTIONS ON INDUSTRY APPLICATIONS, vol. 55, no. 2, 30 April 2019 (2019-04-30), pages 1157 - 1170, XP011714373, DOI: 10.1109/TIA.2018.2882504 * |
| 朱文兵: "变压器套管典型缺陷检测技术研究", 绝缘材料, vol. 52, no. 08, 15 August 2019 (2019-08-15), pages 84 - 89 * |
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