JP2016063151A - Verification test device and verification test method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform a high-reliability verification test on a coil for exchange at any other place than a job site where a transformer is installed, and to reduce cost of the test.SOLUTION: A verification test device includes a temporary core and a core outer surface simulation part. The temporary core includes a core main leg to which the coil for exchange is fitted; a core side leg which is provided in parallel with the core main leg; a core yoke connecting end portions of the core main leg and the core side leg with each other; and a core clamp for holding a plurality of tabular cores forming the core yoke while fastening them in a direction of lamination. The core outer surface simulation part is mounted to the temporary core and forms a simulation core together with the temporary core. The core outer surface simulation part simulates an outer surface of a job-site core that is a core of the transformer, in such a manner that an insulation structure between the coil for exchange fitted to the simulation core and the simulation core becomes equivalent with an insulation structure between the coil for exchange fitted to the job-site core and the job-site core.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a verification test apparatus and a verification test method.

  Conventionally, large transformers are used in power system systems and the like. This type of transformer is accommodated in a storage chamber called a tank, and a cooling device for cooling the transformer is provided outside the tank.

  One of the factors that determine the life of a transformer is the deterioration of the insulator used in the winding. Dielectric breakdown can be induced due to deterioration of the insulator, which can lead to serious system failure.

  For this reason, the insulation of the windings deteriorates over time due to long-term operation, and it is necessary to appropriately update transformers that have reached the end of their lives. When the transformer is updated, only the winding including the deteriorated insulator is updated (replaced), and other components (tank, iron core, cooling device, exterior product, etc., hereinafter referred to as “existing commercial items”). ) Can be used as is without updating. Thereby, compared with the case where all the components of a transformer are updated, it becomes possible to restrain update cost significantly.

  When only the transformer winding is updated as described above, the replacement winding is manufactured at the manufacturing plant, and after the verification test, the replacement winding is shipped to the site where the transformer is installed. . And it will be installed in combination with the existing merchandise locally.

  In order to ensure the soundness of the transformer, it is necessary to conduct a verification test before the replacement winding is shipped and at the time of field installation. In the manufacturing plant, an insulation test and a temperature rise test are performed to confirm the soundness of the replacement winding.

  In the insulation test, it is necessary to confirm that there is no problem in the insulation of the surrounding structure (tank, iron core, clamp, etc.) in addition to the insulation problem in the replacement winding itself. On the other hand, in the temperature rise test, it is necessary to confirm that there is no problem in raising the temperature of the replacement winding or the like with the cooling capacity of the local cooling device.

  In order to carry out the above-described insulation test and temperature rise test, if an existing merchandise is to be transported from the site to a manufacturing factory, the test cost including construction costs and transport costs becomes enormous. In addition, in order to conduct a verification test at the factory, it is possible to manufacture a product equivalent to the existing merchandise. However, the structure of the transformer and the cooling capacity of the cooling device are various for each transformer. Therefore, every time the verification test of the replacement winding is performed, the same product as the existing merchandise is manufactured, and the test cost including the manufacturing cost becomes enormous.

JP 2003-224016 A

  The problem to be solved by the present invention is a verification test apparatus capable of performing a highly reliable verification test on a replacement winding at a place other than the site where the transformer is installed and reducing the test cost. And providing a verification test method.

  A verification test apparatus according to an embodiment is a verification test apparatus for performing an insulation test on a replacement winding for exchanging with a winding of a transformer installed on-site, and a temporary iron core and an iron core outer surface simulation unit With. The temporary iron core includes an iron core main leg to which the replacement winding is attached, an iron core side leg provided in parallel with the iron core main leg, an iron core yoke that connects ends of the iron core main leg and the iron core side leg, And an iron core clamp that holds and holds the plurality of plate-like iron cores constituting the iron core yoke in the stacking direction. The iron core outer surface simulation portion is attached to the temporary iron core and constitutes a simulated iron core together with the temporary iron core. The iron core outer surface simulation unit is configured such that the insulation structure between the replacement winding attached to the simulated iron core and the simulated iron core has a replacement winding attached to the local iron core, which is the iron core of the transformer, and the local The outer surface of the local iron core is simulated so as to be equivalent to the insulating structure between the iron core.

1 is a diagram illustrating a schematic configuration of a verification test apparatus 1 according to a first embodiment. 1 is a top view illustrating a schematic configuration of a verification test apparatus 1. FIG. 1 is an overall perspective view showing a schematic configuration of a simulated iron core 2. FIG. It is sectional drawing which follows the AA line of FIG. It is sectional drawing which follows the BB line of FIG. It is sectional drawing which follows the CC line of FIG. It is a top view which shows schematic structure of the verification test apparatus 1A which concerns on a modification. It is a figure which shows schematic structure of the verification test apparatus 1B which concerns on 2nd Embodiment.

  Hereinafter, a verification test apparatus and a verification test method according to an embodiment will be described with reference to the drawings. In addition, in each figure, the component which has an equivalent function is attached | subjected the same code | symbol, and detailed description of the component of the same code | symbol is not repeated.

(First embodiment)
First, the overall configuration of the verification test apparatus 1 according to the first embodiment will be described with reference to FIG. FIG. 1 shows a schematic configuration of a verification test apparatus 1 according to the present embodiment. FIG. 1 shows a state before the simulated iron core 2 and the replacement winding 50 are accommodated in the temporary tank 20.

  The verification test apparatus 1 performs an insulation test on the replacement winding 50 for replacing with a winding of a transformer installed in the field (hereinafter also simply referred to as “local transformer”). This is a verification test device for use in wire manufacturing factories.

  As shown in FIG. 1, the verification test apparatus 1 includes a simulated iron core 2, a temporary tank 20, and a tank inner surface simulation member 21.

  The simulated iron core 2 is an iron core that simulates the configuration (outer surface) of an iron core of a local transformer (hereinafter also referred to as “local iron core”), and has a temporary iron core and an iron core outer surface simulation portion as described later. The newly manufactured replacement winding 50 is attached to the simulated iron core as shown in FIG. More specifically, after the main leg of the simulated iron core 2 is inserted through the axial through hole of the replacement winding 50, the replacement winding 50 is fixed by the winding fastening plate 8 and the winding fastening instrument 9 described later. Fix to the mock iron core 2. The configuration of the simulated iron core 2 will be described in detail later with reference to FIGS.

  As shown in FIG. 1, the temporary tank 20 accommodates the simulated iron core 2 and the replacement winding 50 attached to the simulated iron core 2. The temporary tank 20 is made larger in consideration of the fact that a tank that accommodates a local transformer (hereinafter also simply referred to as “local tank”) can take various sizes and shapes.

  As shown in the example of FIG. 1, three tank inner surface simulation members 21 are installed around the simulated iron core 2. More specifically, the tank inner surface simulation member 21 includes the replacement winding 50 and the local tank in which the distance between the replacement winding 50 accommodated in the temporary tank 20 and the tank inner surface simulation member 21 is attached to the local iron core. It is installed in the temporary tank 20 so as to be substantially equal to the distance between the two. By being installed in this manner, the tank inner surface simulation member 21 and the temporary tank 20 constitute a simulation tank that simulates a local tank.

  The tank inner surface simulation member 21 may be configured to simulate the shape of the inner surface of the local tank. For example, the surface shape of the tank inner surface simulation member 21 may be substantially the same as the shape of the inner wall surface of the local tank.

  The tank inner surface simulation member 21 is made of a conductive material such as metal or carbon, and each tank inner surface simulation member 21 is grounded. In addition, you may create the tank inner surface simulation member 21 using the same material as the inner surface of a local tank. The tank inner surface simulation members 21 may be connected to each other, and a certain amount of gap may be provided between the tank inner surface simulation members 21 as shown in FIG.

  Although the tank inner surface simulation member 21 shown in FIG. 1 simulates the inner wall of the local tank, the tank inner surface simulation member is not limited to this, and the tank inner surface simulation member is used as the floor of the temporary tank 20 so as to simulate the floor surface and ceiling of the local tank. It may be provided on the surface or ceiling.

  As described above, the tank inner surface simulation member 21 includes the replacement winding 50 in which the insulation structure between the replacement winding 50 accommodated in the temporary tank 20 and the tank inner surface simulation member 21 is attached to the local iron core. The inner surface (inner wall surface, floor surface, ceiling, etc.) of the local tank is simulated so as to be equivalent to the insulation structure between the tank and the local tank.

  In the example of FIG. 1, the tank inner surface simulation member 21 is installed so as to surround the simulated iron core 2 and the replacement winding 50 from three directions. However, the tank inner surface simulation member 21 may be provided on the right side in FIG. 1 so as to surround the simulated iron core 2 and the replacement winding 50 from four directions. Normally, since discharge first occurs between the windings attached to the main legs of the iron core and the side legs of the iron core, the tank inner surface simulation member 21 that simulates the right inner wall surface of the local tank is provided in the example of FIG. Not.

  By configuring the simulated tank with the temporary tank 20 and the tank inner surface simulation member 21 as described above, a verification test such as an insulation test is performed much more easily and at a lower cost than when a tank equivalent to a local tank is manufactured. be able to. Furthermore, since the tank inner surface simulation member 21 simulates the inner surface of the local tank, a highly reliable insulation test can be performed.

  In addition, as shown in FIG. 2, you may make it simulate the insulation structure between the lead wire 51 of the coil | winding 50 for replacement | exchange, and a local tank by providing the routing route simulation member 22. As shown in FIG. The routed route simulation member 22 is provided around the lead wire 51 routed to the test bushing 25 through the same route as that accommodated in the local tank. The routing route simulation member 22 constitutes a simulation tank together with the temporary tank 20 and the tank inner surface simulation member 21.

  The routing route simulating member 22 has an insulating structure between the lead wire 51 of the replacement winding 50 accommodated in the simulation tank and the routing route simulating member 22, and the replacement winding 50 accommodated in the local tank. The insulation structure around the lead wire of the local tank is simulated so as to be equivalent to the insulation structure between the lead wire 51 and the local tank (the routing route member). For example, the routing route simulation member 22 is provided such that the distance between the routing route simulation member 22 and the lead wire 51 is substantially equal to the distance between the local tank and the lead wire 51.

  The routing route simulation member 22 may be configured to simulate the shape of a structure (such as a wiring duct) around the lead wire of the local tank.

  Next, a detailed configuration of the simulated iron core 2 will be described with reference to FIGS. FIG. 3 is an overall perspective view showing a schematic configuration of the simulated iron core 2. 4 is a sectional view taken along line AA in FIG. 3, FIG. 5 is a sectional view taken along line BB in FIG. 3, and FIG. 6 is a sectional view taken along line CC in FIG. . In FIG. 3, the yoke surface simulation member 12 and the clamp surface simulation member 13 are not shown.

  The simulated iron core 2 includes a temporary iron core and an iron core outer surface simulation portion attached to the temporary iron core. First, the temporary iron core will be described.

  As shown in FIGS. 3 and 5, the temporary iron core includes a core main leg 3 to which the replacement winding 50 is attached, a core side leg 4 provided in parallel with the iron core main leg 3, and a plate-like iron core such as an electromagnetic steel plate. There are iron core yokes 5 and 6 formed by laminating a plurality of 5a, and an iron core clamp 7 for holding the iron core yokes 5 and 6.

  The upper iron core yoke 5 connects the upper ends of the iron core main leg 3 and the iron core side leg 4 to each other. The lower iron core yoke 6 connects the lower ends of the iron core main leg 3 and the iron core side leg 4 to each other. The iron core clamp 7 clamps and holds a plurality of plate-like iron cores 5a constituting the iron core yoke 5 (6) in the stacking direction.

  The iron core main leg 3 is made long and narrow considering that the local iron core can take various sizes and shapes.

  Next, the iron core outer surface simulation part will be described. The iron core outer surface simulation part constitutes the mock iron core 2 together with the temporary iron core. The iron core outer surface simulation portion is made of a conductive material and is grounded. The iron core outer surface simulation portion is preferably made of a conductive and high resistance material (for example, carbon).

  The iron core outer surface simulation portion includes a main leg surface simulation member 11, a yoke surface simulation member 12, and a clamp surface simulation member 13.

  The main leg surface simulating member 11 is a cylindrical member that simulates the main leg surface of the local iron core. Here, “the main leg surface of the local iron core” means the outer peripheral surface of the core main leg of the local iron core. As shown in FIG. 4, the iron core main leg 3 of a temporary iron core is inserted into the main leg surface simulation member 11. A replacement winding 50 is attached to the outer peripheral surface of the main leg surface simulating member 11 via a winding cylinder 19.

  The main leg surface simulating member 11 has the same distance (first distance) between the replacement winding 50 attached to the simulated iron core 2 and the main leg surface simulating member 11 as the replacement winding 50 attached to the local iron core. It is comprised so that it may become substantially equal to the distance (2nd distance) between the main legs of an iron core. That is, the shape of the main leg surface simulation member 11 and the installation position on the temporary iron core are adjusted so that the first distance and the second distance are substantially equal.

  By using the simulated iron core 2 provided with the main leg surface simulation member 11 as described above, it is possible to test whether or not a discharge occurs between the core main leg of the local iron core and the replacement winding 50.

  The yoke surface simulation member 12 is a member that simulates the yoke surface of the local iron core. Here, “the yoke surface of the local iron core” is the inner surface of the iron core yoke of the local iron core. As shown in FIG. 5, with respect to the upper iron core yoke 5, the yoke surface simulation member 12 is provided so as to cover the inner surface (lower surface) of the iron core yoke 5. Similarly, the yoke core simulating member 12 is provided so as to cover the inner surface (upper surface) of the iron core yoke 6 for the lower iron core yoke 6. The yoke surface simulating member 12 has, for example, a U-shaped cross section as shown in FIG.

  The yoke surface simulation member 12 has the same distance (first distance) between the replacement winding 50 attached to the simulated iron core 2 and the yoke surface simulation member 12 as the replacement winding 50 attached to the local iron core. It is comprised so that it may become substantially equal to the distance (2nd distance) between the yokes of an iron core. That is, the shape of the yoke surface simulation member 12 and the installation position on the temporary iron core are adjusted so that the first distance and the second distance are substantially equal.

  By using the simulated iron core 2 provided with the yoke surface simulation member 12 as described above, it is possible to test whether or not a discharge occurs between the iron core yoke of the local iron core and the replacement winding 50.

  The clamp surface simulation member 13 is a member that simulates the clamp surface of the local iron core. Here, the “clamp surface of the local iron core” refers to the inner surface of the iron core clamp of the local iron core (the surface facing the end surface of the winding). As shown in FIG. 6, the clamp surface simulation member 13 is provided between the iron core clamp 7 and the winding fastening plate 8. The winding fastening plate 8 receives the pressing force from the winding fastening device 9 and fastens the replacement winding 50 in the axial direction. The winding fastening plate 8 is provided with a through hole, and the iron core yoke 5 is inserted through the through hole. Further, as shown in FIG. 6, a spacer member 14 is interposed between the winding fastening plate 8 and the clamping surface simulation member 13, and between the winding fastening plate 8 and the replacement winding 50. A spacer member 15 is interposed.

  The clamping surface simulation member 13 includes a replacement winding 50 attached to the simulated iron core 2 and a distance (first distance) between the replacement winding 50 attached to the simulation core 13 and the replacement winding 50 attached to the local iron core. It is configured to be approximately equal to the distance (second distance) between the iron core and the clamp. That is, the shape of the clamp surface simulation member 13 and the installation position on the temporary iron core are adjusted so that the first distance and the second distance are substantially equal.

  By using the simulated iron core 2 provided with such a clamp surface simulation member 13, it is possible to test whether or not a discharge occurs between the core clamp of the local iron core and the replacement winding 50.

  As described above, in the first embodiment, the iron core outer surface simulation portion that configures the simulated iron core 2 together with the temporary iron core has an insulating structure between the replacement winding 50 and the simulated iron core 2 and the replacement winding 50. The outer surface of the local iron core is simulated to be equivalent to the insulation structure between the local iron core.

  Therefore, according to the first embodiment, a highly reliable verification test for the replacement winding can be performed at a place other than the site where the transformer is installed.

  Furthermore, according to the first embodiment, it is not necessary to transport the local iron core or the local tank to the test place, or to manufacture the same thing as the local iron core or the local tank, so that the test cost can be greatly reduced. it can.

  Next, a modification of the first embodiment will be described. Also by this modification, the same effect as the first embodiment can be obtained.

(Modification)
This modification is a verification test apparatus when the transformer installed in the field is a three-phase transformer. The three-phase transformer has three iron cores arranged at a predetermined interval, and each iron core has the same configuration as the above-mentioned local iron core. FIG. 7 is a top view showing a schematic configuration of a verification test apparatus 1A according to the present modification. As shown in FIG. 7, three simulated iron cores 2 a, 2 b, 2 c having the same configuration as the above-described simulated iron core 2 are arranged at a predetermined interval and accommodated in the temporary tank 20. This interval is adjusted to be the same as the core of the local three-phase transformer. Further, the replacement windings 50 are respectively attached to the simulated iron cores 2a, 2b, 2c.

  The tank inner surface simulation member 21 is installed around the simulated iron cores 2a, 2b, 2c, and simulates the inner surface (inner wall surface, etc.) of the local tank in which the local three-phase transformer is accommodated. More specifically, the tank inner surface simulating member 21 has a structure in which each of the simulated iron cores 2a, 2b, and 2c has an insulating structure between the replacement winding 50 attached to the simulated core and the simulated tank corresponding to the simulated core. The inner surface of the local tank is simulated so as to be equivalent to an insulating structure between the replacement winding 50 attached to the iron core and the local tank. As a result, even when the transformer is a three-phase transformer, a highly reliable verification test can be performed on the replacement winding at a place other than the site where the transformer is installed.

(Verification test method)
Here, a method of performing an insulation test of the replacement winding 50 using the above-described verification test apparatus 1 will be described. Note that the insulation test can be performed on the verification test apparatus 1A in the same manner.

  First, the replacement winding 50 is attached to the simulated iron core 2. Thereafter, the simulated iron core 2 is accommodated in the temporary tank 20. The simulated iron core 2 may be installed in the temporary tank 20 in advance, and the replacement winding 50 may be attached to the simulated iron core 2. Then, insulating oil is injected into the temporary tank 20 to immerse the replacement winding 50 and the simulated iron core 2.

  Next, a predetermined voltage is applied to the replacement winding 50. This voltage may be AC or DC depending on the test content. Note that a voltage higher than the use condition may be applied to the replacement winding 50.

  Then, the discharge generated between the replacement winding 50 and the simulated iron core 2 and between the replacement winding 50 and the simulation tank is measured.

(Second Embodiment)
Next, a verification test apparatus 1B according to the second embodiment will be described with reference to FIG. FIG. 8 shows a schematic configuration of the verification test apparatus 1B. In FIG. 8, the tank inner surface simulation member 21 is not shown.

  The verification test apparatus 1B is a verification test apparatus for performing a temperature rise test on the replacement winding 50 in addition to the insulation test at a place other than the site.

  As shown in FIG. 8, the verification test apparatus 1 </ b> B further includes a simulated cooling apparatus 30 in addition to the configuration of the verification test apparatus 1 (simulated iron core 2, temporary tank 20, and tank inner surface simulation member 21). The simulated cooling device 30 is attached to a local tank and simulates a cooling device that cools the local transformer (hereinafter also referred to as “local cooling device”).

  As shown in FIG. 8, the simulated cooling device 30 includes a cooler 31, a pump 32, a first control unit 33, and a second control unit 34.

  The cooler 31 cools the cooling medium that has passed through the inside of the replacement winding 50. The cooler 31 includes a fin portion (not shown) having a plurality of fins, and a cooling fan (not shown) that blows and cools air toward the fin portion. Inside the fin portion, a refrigerant flow path is provided through which a cooling medium (for example, oil or gas) for cooling the replacement winding 50 flows. This refrigerant flow path is connected to the oil guide pipes 26 and 27. The oil guide pipe 26 connects the pump 32 and the replacement winding 50, and the oil guide pipe 27 connects the replacement winding 50 and the cooler 31.

  The pump 32 sends the cooling medium cooled by the cooler 31 to the replacement winding 50. The cooling medium sent out by the pump 32 passes through the oil guide pipe 26 and passes through the cooling medium flow path (oil passage) in the replacement winding 50 to cool the replacement winding 50.

  The first control unit 33 controls the number of rotations (air flow rate) of the cooling fan of the cooler 31. The first control unit 33 is, for example, a variable frequency power supply, and controls the rotation speed of the cooling fan by pulse frequency modulation (PFM) control.

  The first control unit 33 performs cooling so that the cooling amount of the cooler 31 (for example, the amount of heat taken from the object per unit time [kcal / h]) becomes equal to the cooling amount of the cooler of the local cooling device. Controls the fan speed. When the first control unit 33 is a variable frequency power supply, the frequency is adjusted so that the number of rotations of the cooling fan becomes a predetermined value.

  The relationship between the number of rotations of the cooling fan of the simulated cooling device 30 (air flow rate) and the cooling amount of the cooler 31 is obtained in advance, and the first control unit 33 rotates the cooling fan based on the relationship. The number may be controlled.

  Moreover, the cooler 31 of the simulated cooling device 30 may have a number of cooling fans according to the cooling amount of the cooler of the local cooling device. For example, if the cooling amount of the cooler of the local cooling device cannot be obtained by controlling the number of rotations of the cooling fan of the cooler 31, the number of cooling fans is increased to two or more to reduce the local cooling. The cooling amount of the cooler of the apparatus may be simulated.

  The second control unit 34 controls the delivery amount (oil feed amount) of the pump 32. The second control unit 34 is, for example, a variable frequency power supply, and controls the delivery amount of the pump 32 by pulse frequency modulation (PFM) control.

  The second control unit 34 controls the delivery amount of the pump 32 so that the delivery amount of the pump 32 is equal to the delivery amount of the pump of the local cooling device. When the second control unit 34 is a variable frequency power supply, the frequency is adjusted so that the delivery amount of the pump 32 becomes a predetermined value.

(Verification test method)
Here, a method of performing a temperature rise test of the replacement winding 50 using the above-described verification test apparatus 1B will be described.

  First, the replacement winding 50 is attached to the simulated iron core 2. Thereafter, the simulated iron core 2 is accommodated in the temporary tank 20. The simulated iron core 2 may be installed in the temporary tank 20 in advance, and the replacement winding 50 may be attached to the simulated iron core 2. Then, insulating oil is injected into the temporary tank 20 to immerse the replacement winding 50 and the simulated iron core 2.

  Next, a predetermined voltage is applied to the replacement winding 50. This voltage may be AC or DC depending on the test content. Note that a voltage higher than the use condition may be applied to the replacement winding 50.

  Then, the temperature of the replacement winding 50 (winding temperature) is measured, and it is confirmed that the temperature rise is within a predetermined range. In addition, the temperature (oil temperature) of the insulating oil injected into the temporary tank 20 may be measured to confirm that the temperature increase range is within a predetermined range.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

1, 1A, 1B Verification test apparatus 2, 2a, 2b, 2c Simulated iron core 3 Core main leg 4 Iron core side leg 5 (Upper) iron core yoke 5a Plate iron core 6 (Lower) iron core yoke 7 Iron core clamp 8 Winding Clamping plate 9 Winding fastening device 11 Main leg surface simulation member 12 Yoke surface simulation member 13 Clamp surface simulation member 14, 15 Spacer member 19 Winding cylinder 20 Temporary tank 21 Tank inner surface simulation member 22 Route route simulation member 25 Test bushing 26, 27 Oil guide pipe 30 Simulated cooling device 31 Cooler 32 Pump 33, 34 Controller 50 Replacement coil 51 Lead wire

Claims (12)

A verification test device for performing an insulation test on a replacement winding for replacing a transformer winding installed on the site,
An iron core main leg to which the replacement winding is attached; an iron core side leg provided in parallel with the iron core main leg; an iron core yoke that connects ends of the iron core main leg and the iron core side leg; and the iron core yoke; A temporary iron core having an iron core clamp that holds and holds a plurality of plate-shaped iron cores in the stacking direction;
An iron core outer surface simulation part that is mounted on the temporary iron core and constitutes a simulated iron core together with the temporary iron core,
The iron core outer surface simulation unit is configured such that the insulation structure between the replacement winding attached to the simulated iron core and the simulated iron core has a replacement winding attached to the local iron core, which is the iron core of the transformer, and the local A verification test apparatus characterized by simulating the outer surface of the local iron core so as to be equivalent to an insulating structure between the iron core.   The said core outer surface simulation part contains the cylindrical main leg surface simulation member by which the said core main leg of the said temporary iron core is penetrated inside, and simulates the main leg surface of the said local iron core. Verification test equipment.   The said iron core outer surface simulation part is provided so that the inner surface of the said iron core yoke of the said temporary iron core may be covered, The yoke surface simulation member which simulates the yoke surface of the said local iron core is included. The verification test apparatus described.   The iron core outer surface simulation part is provided between the iron core clamp of the temporary iron core and a winding fastening plate for tightening the replacement winding in the axial direction, and simulates a clamp surface that simulates the clamp surface of the local iron core. The verification test apparatus according to claim 1, further comprising a member. A temporary tank that houses the mock iron core and the replacement winding attached to the mock iron core;
A tank inner surface simulation member that is installed around the simulated iron core and constitutes the simulated tank together with the temporary tank;
In the tank inner surface simulation member, the insulating structure between the replacement winding attached to the simulated iron core and the tank inner surface simulation member accommodates the replacement winding attached to the local iron core and the transformer. The verification test apparatus according to claim 1, wherein an inner surface of the local tank is simulated so as to be equivalent to an insulating structure between the local tank and the tank. A routing route simulation member provided around a lead wire of the replacement winding routed by the same route as that housed in the local tank;
The routing route simulating member has an insulating structure between the lead wire of the replacement winding housed in the simulation tank and the routing route simulating member, and the lead of the replacement winding housed in the local tank. 6. The verification test apparatus according to claim 5, wherein the insulation structure around the lead wire of the local tank is simulated so as to be equivalent to an insulation structure between a wire and the local tank.   When the transformer installed at the site is a three-phase transformer having three local cores arranged at predetermined intervals, each has the same configuration as the simulated iron core and arranged at the predetermined intervals The first to third simulated iron cores are accommodated in the temporary tank, the replacement windings are respectively attached to the first to third simulated iron cores, and the tank inner surface simulation member is the first tank For each of the third simulated iron cores, the local tank is configured such that the insulation structure between the replacement winding and the simulated tank is equivalent to the insulation structure between the replacement winding and the local tank. The verification test apparatus according to claim 5, wherein the verification test apparatus simulates the inner surface of the test apparatus. A simulation cooling device for simulating a field cooling device for cooling the transformer installed on the site;
The simulated cooling device is
A refrigerant flow path through which a cooling medium for cooling the replacement winding flows, a fin portion having a plurality of fins, and a cooler having a cooling fan for blowing air toward the fin portions;
A pump for delivering a cooling medium cooled by the cooler to the replacement winding;
A first control unit for controlling the number of rotations of the cooling fan;
A second control unit for controlling the delivery amount of the pump,
The first control unit controls the number of rotations of the cooling fan so that the cooling amount of the cooler becomes equal to the cooling amount of the cooler of the on-site cooling device, and the second control unit includes the pump The verification test apparatus according to claim 1, wherein the pump delivery amount is controlled such that the delivery amount of the pump is equal to a delivery amount of the pump of the local cooling device.   The first control unit controls the number of rotations of the cooling fan based on the relationship between the number of rotations of the cooling fan of the simulated cooling device and the cooling amount of the cooler of the simulated cooling device. The verification test apparatus according to claim 8.   10. The verification test apparatus according to claim 8, wherein the cooler of the simulated cooling apparatus includes a number of cooling fans corresponding to a cooling amount of the cooler of the on-site cooling apparatus. A verification test method for performing an insulation test of a replacement winding using the verification test apparatus according to claim 1,
A verification test method in which a predetermined voltage is applied to a replacement winding attached to the simulated iron core to measure a discharge generated between the replacement winding and the simulated iron core or the simulated tank. A verification test method for performing a temperature rise test of a replacement winding using the verification test apparatus according to claim 1,
A verification test method in which a predetermined voltage is applied to a replacement winding attached to the simulated iron core, and the temperature of the replacement winding is measured.

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