Secondary winding error compensation device and mutual inductor

Abstract

The utility model relates to a secondary winding error compensation device and a mutual inductor. The secondary winding error compensation device comprises a reactor compensation winding, a primary winding compensation winding, a plurality of first compensation wiring terminals, a plurality of second compensation wiring terminals, a plurality of transition terminals, a grounding terminal and an adjusting unit. The reactor compensation winding is used for compensating the phase difference of the secondary winding; the primary winding compensation winding is used for compensating the ratio error of the secondary winding; the plurality of first compensation wiring terminals are respectively connected with the reactor compensation winding; the plurality of second compensation wiring terminals are respectively connected with the primary winding compensation winding; the plurality of transition terminals are respectively communicated with the corresponding first compensation wiring terminals; and the grounding terminal is communicated with the second compensation wiring terminal. The voltage transformer has the advantages that the reactor compensation winding and the primary winding compensation winding are arranged in the transformer, so that the problem that the error performance of the secondary winding is poorer than that of a traditional electromagnetic voltage transformer is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer winding compensation, in particular to a secondary winding error compensation device and a transformer. Background Art

[0002] A capacitive voltage transformer divides voltage by connecting capacitors in series, and then further steps down and isolates the voltage through an electromagnetic voltage transformer to transmit information to measuring instruments, meters or relay protection and control devices. Compared with traditional electromagnetic voltage transformers, capacitive voltage transformers have the advantages of high impulse insulation strength, simple manufacturing, light weight, small volume, low cost, reliable operation, convenient maintenance, and can also serve as coupling capacitors for high-frequency carrier communication. However, since capacitive voltage transformers have additional components such as capacitive voltage dividers and compensation reactors compared to traditional electromagnetic voltage transformers, their secondary winding error performance is worse than that of traditional electromagnetic voltage transformers.

[0003] Currently, for problems such as the secondary winding error performance being worse than that of traditional electromagnetic voltage transformers in related technologies, no effective solutions have been proposed. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a secondary winding error compensation device and a transformer for the deficiencies in the prior art, so as to solve problems such as the secondary winding error performance being worse than that of traditional electromagnetic voltage transformers in related technologies.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is:

[0006] In a first aspect, a secondary winding error compensation device for a transformer is provided, including:

[0007] A reactor compensation winding wound inside the reactor winding for compensating the phase difference of the secondary winding;

[0008] A primary winding compensation winding wound inside the primary winding for compensating the ratio error of the secondary winding;

[0009] A number of first compensation connection terminals respectively connected to the reactor compensation winding;

[0010] A number of second compensation connection terminals respectively connected to the primary winding compensation winding;

[0011] A number of transition terminals respectively connected to the corresponding first compensation connection terminals;

[0012] A grounding terminal connected to the second compensation connection terminal;

[0013] An adjustment unit, which is detachably connected to a plurality of the first compensation connection terminals, a plurality of the second compensation connection terminals, the transition terminal, and the grounding terminal respectively, and is used to adjust the error compensation values of the reactor compensation winding and the primary winding compensation winding.

[0014] In some embodiments, the adjustment unit includes:

[0015] At least one first adjustment element, which is respectively connected to at least two corresponding first compensation connection terminals;

[0016] At least one second adjustment element, which is respectively connected to at least two corresponding second compensation connection terminals;

[0017] At least one third adjustment element, which is respectively connected to one second compensation connection terminal and the transition terminal;

[0018] At least one fourth adjustment element, which is respectively connected to the second compensation connection terminal and the grounding terminal.

[0019] In some embodiments, the adjustment unit further includes:

[0020] At least one fifth adjustment element, which is respectively connected to the first compensation connection terminal and the second compensation connection terminal.

[0021] In some embodiments, it further includes:

[0022] A first connection unit, which is respectively connected to the reactor compensation winding and a plurality of the first compensation connection terminals.

[0023] In some embodiments, the first connection unit includes:

[0024] A plurality of first connection elements, which are respectively connected to the reactor compensation winding and a plurality of the first compensation connection terminals.

[0025] In some embodiments, it further includes:

[0026] A second connection unit, which is respectively connected to the primary winding compensation winding and a plurality of the second compensation connection terminals.

[0027] In some embodiments, the second connection unit includes:

[0028] A plurality of second connection elements, and a plurality of the second connection elements are respectively connected to the primary winding compensation winding and a plurality of the second compensation connection terminals.

[0029] In some of these embodiments, it further includes:

[0030] A secondary wiring unit, and the secondary wiring unit is provided with a plurality of the first compensation connection terminals, a plurality of second compensation connection terminals, a plurality of transition terminals, and a grounding terminal.

[0031] In some of these embodiments, the secondary wiring unit includes:

[0032] A secondary wiring board, and the secondary wiring board is provided with a plurality of the first compensation connection terminals, a plurality of the second compensation connection terminals, a plurality of the transition terminals, and the grounding terminal;

[0033] A protection element, and the protection element is arranged outside the secondary wiring board and is detachably connected to the fuel tank for protecting the secondary wiring board.

[0034] In some of these embodiments, the secondary wiring unit further includes:

[0035] A plurality of secondary connection terminals, and a plurality of the secondary connection terminals are distributed on the secondary wiring board.

[0036] In a second aspect, there is provided an instrument transformer, including:

[0037] The secondary winding error compensation device as described in the first aspect.

[0038] In some of these embodiments, it further includes:

[0039] A fuel tank;

[0040] A main iron core, and the main iron core is arranged inside the fuel tank, and the primary winding compensation winding is wound around the outside of the main iron core;

[0041] A primary winding, and the primary winding is wound around the main iron core;

[0042] A secondary winding, and the secondary winding is wound around the main iron core and is located inside the primary winding compensation winding;

[0043] A reactor iron core, and the reactor iron core is arranged inside the fuel tank, and the reactor compensation winding is wound around the outside of the reactor iron core;

[0044] A reactor winding, and the reactor winding is wound around the reactor iron core.

[0045] The present utility model adopts the above technical solutions, and compared with the prior art, has the following technical effects:

[0046] A secondary winding error compensation device and an instrument transformer of the present utility model are provided. By arranging a reactor compensation winding and a primary winding compensation winding inside the instrument transformer and connecting them to a first compensation terminal and a second compensation terminal outside through cables, the error can be adjusted by adjusting the connection mode of the adjustment unit. After the product is completely assembled, the error of the secondary winding can be adjusted without repeatedly opening the oil tank to adjust the error compensation wire, solving the problem that the error performance of the secondary winding is worse than that of traditional electromagnetic voltage transformers. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 FIG. 1 is a schematic diagram (1) of a secondary winding error compensation device according to an embodiment of the present utility model;

[0048] Figure 2 FIG. 2 is a schematic diagram of an adjustment unit according to an embodiment of the present utility model;

[0049] Figure 3 FIG. 3 is a schematic diagram (2) of a secondary winding error compensation device according to an embodiment of the present utility model;

[0050] Figure 4 FIG. 4 is a schematic diagram of a first connection unit according to an embodiment of the present utility model;

[0051] Figure 5 FIG. 5 is a schematic diagram (3) of a secondary winding error compensation device according to an embodiment of the present utility model;

[0052] Figure 6 FIG. 6 is a schematic diagram of a second connection unit according to an embodiment of the present utility model;

[0053] Figure 7 FIG. 7 is a schematic diagram (4) of a secondary winding error compensation device according to an embodiment of the present utility model;

[0054] Figure 8 FIG. 8 is a schematic diagram of a secondary wiring unit according to an embodiment of the present utility model;

[0055] Figure 9 FIG. 9 is a schematic diagram of an instrument transformer according to an embodiment of the present utility model.

[0056] The reference numerals therein are: 100, secondary winding error compensation device;

[0057] 110, reactor compensation winding;

[0058] 120, primary winding compensation winding;

[0059] 130, first compensation terminal;

[0060] 140, second compensation terminal;

[0061] 150. Transition terminal

[0062] 160. Grounding terminal

[0063] 170. Adjustment unit; 171. First adjustment element; 172. Second adjustment element; 173. Third adjustment element; 174. Fourth adjustment element; 175. Fifth adjustment element

[0064] 180. First connection unit; 181. First connection element

[0065] 190. Second connection unit; 191. Second connection element

[0066] 1100. Secondary wiring unit; 1101. Secondary wiring board; 1102. Protection element

[0067] 200. Oil tank

[0068] 300. Main iron core

[0069] 400. Secondary winding

[0070] 500. Primary winding

[0071] 600. Reactor iron core

[0072] 700. Reactor winding Detailed implementation manners

[0073] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0074] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments may be combined with each other.

[0075] The present utility model will be further described below with reference to the accompanying drawings and specific embodiments, but it is not a limitation of the present utility model.

[0076] Embodiment 1

[0077] This embodiment relates to a secondary winding error compensation device of the present utility model.

[0078] A schematic embodiment of the present utility model is as Figure 1As shown in the figure, a secondary winding error compensation device 100 for an instrument transformer includes a reactor compensation winding 110, a primary winding compensation winding 120, a plurality of first compensation connection terminals 130, a plurality of second compensation connection terminals 140, a plurality of transition terminals 150, a grounding terminal 160, and an adjustment unit 170. Among them, the reactor compensation winding 110 is wound inside the reactor winding and is used to compensate the phase difference of the secondary winding; the primary winding compensation winding 120 is wound inside the primary winding and is used to compensate the ratio error of the secondary winding; a plurality of first compensation connection terminals 130 are respectively connected to the reactor compensation winding 110; a plurality of second compensation connection terminals 140 are respectively connected to the primary winding compensation winding 120; a plurality of transition terminals 150 are respectively communicated with the corresponding first compensation connection terminals 130; the grounding terminal 160 is communicated with the second compensation connection terminals 140; the adjustment unit 170 is detachably connected to a plurality of first compensation connection terminals 130, a plurality of second compensation connection terminals 140, the transition terminals 150, and the grounding terminal 160 respectively, and is used to adjust the error compensation values of the reactor compensation winding 110 and the primary winding compensation winding 120.

[0079] In the present utility model, the instrument transformer includes, but is not limited to, a capacitive voltage transformer.

[0080] In some of the embodiments, the reactor compensation winding 110 includes, but is not limited to, a layer winding, a continuous winding, and a spiral winding.

[0081] In some of the embodiments, the primary winding compensation winding 120 includes, but is not limited to, a layer winding, a continuous winding, and a spiral winding.

[0082] In some of the embodiments, the first compensation connection terminals 130 are numbered Rn (n is an integer in sequential order).

[0083] In some of the embodiments, the number of the first compensation connection terminals 130 is 5. Specifically, the numbers of the first 4 first compensation connection terminals 130 are R1, R2, R3, and R4 respectively. Among them, every 2 first compensation connection terminals 130 are in a group in sequence, and the 2 first compensation connection terminals 130 are respectively connected to both ends of the reactor compensation winding 110; the number of the first compensation connection terminal 130 at the starting end is PR2, and this first compensation connection terminal 130 is connected to the starting end of the reactor compensation winding 110.

[0084] In some of the embodiments, the second compensation connection terminals 140 and the primary winding compensation winding 120 are connected by a cable connection line.

[0085] The number of the second compensation connection terminals 140 matches the number of the first compensation connection terminals 130. Generally, the number of the second compensation connection terminals 140 is not less than the number of the first compensation connection terminals 130.

[0086] In some embodiments thereof, the second compensation connection terminals 140 are numbered Tm (m is an integer in sequential order).

[0087] In some embodiments thereof, the number of the second compensation connection terminals 140 is 10. Specifically, the 10 second compensation connection terminals 140 are numbered T1, T2... T9, T10 respectively, where every 2 second compensation connection terminals 140 are in a group in sequence, and the 2 second compensation connection terminals 140 are respectively connected to both ends of the primary winding compensation winding 120.

[0088] In some embodiments thereof, there are 2 transition terminals 150. The 2 transition terminals 150 are symmetrically arranged and are arranged on one side close to several second compensation connection terminals 140.

[0089] The grounding terminal 160 is arranged on one side close to several first compensation connection terminals 130.

[0090] As Figure 2 shown, the adjustment unit 170 includes at least one first adjustment element 171, at least one second adjustment element 172, at least one third adjustment element 173 and at least one fourth adjustment element 174. Among them, the first adjustment element 171 is respectively connected to at least two corresponding first compensation connection terminals 130; the second adjustment element 172 is respectively connected to at least two corresponding second compensation connection terminals 140; the third adjustment element 173 is respectively connected to one second compensation connection terminal 140 and the transition terminal 150; the fourth adjustment element 174 is respectively connected to the second compensation connection terminal 140 and the grounding terminal 160.

[0091] In some embodiments thereof, the first adjustment element 171 is snap-connected to the first compensation connection terminal 130.

[0092] The number of the first adjustment elements 171 matches the number of the first compensation connection terminals 130. Generally, the number of the first adjustment elements 171 is less than the number of the first compensation connection terminals 130.

[0093] In some embodiments thereof, there are several first adjustment elements 171. The several first adjustment elements 171 are respectively connected to the first compensation connection terminals 130 in pairs.

[0094] In some embodiments thereof, the first adjustment element 171 is a copper sheet.

[0095] In some of these embodiments, the second adjustment element 172 is snap-connected to the second compensation terminal 140.

[0096] The number of the second adjustment elements 172 matches the number of the second compensation terminals 140. Generally, the number of the second adjustment elements 172 is less than the number of the second compensation terminals 140.

[0097] In some of these embodiments, there are a plurality of second adjustment elements 172. A plurality of the second adjustment elements 172 are respectively connected to the second compensation terminals 140 in pairs.

[0098] In some of these embodiments, the second adjustment element 172 is a copper sheet.

[0099] In some of these embodiments, the third adjustment element 173 is snap-connected to the second compensation terminal 140 and the transition terminal 150.

[0100] The number of the third adjustment elements 173 matches the number of the transition terminals 150. Generally, the number of the third adjustment elements 173 is equal to the number of the transition terminals 150, that is, the third adjustment elements 173 and the transition terminals 150 are in one-to-one correspondence.

[0101] In some of these embodiments, there are a plurality of third adjustment elements 173. A plurality of the third adjustment elements 173 are respectively arranged between two adjacent transition terminals 150. At the same time, a plurality of the third adjustment elements 173 are respectively connected to a plurality of second compensation terminals 140.

[0102] In some of these embodiments, the third adjustment element 173 is a copper sheet.

[0103] In some of these embodiments, the fourth adjustment element 174 is snap-connected to the second compensation terminal 140 and the grounding terminal 160.

[0104] The number of the fourth adjustment elements 174 matches the number of the second compensation terminals 140. Generally, the number of the fourth adjustment elements 174 is not greater than the number of the second compensation terminals 140.

[0105] The number of the fourth adjustment elements 174 matches the number of the grounding terminals 160. Generally, the number of the fourth adjustment elements 174 is equal to the number of the grounding terminals 160.

[0106] In some of these embodiments, the fourth adjustment element 174 is a copper sheet.

[0107] Further, the adjustment unit 170 further includes at least one fifth adjustment element 175. Wherein, the fifth adjustment element 175 is respectively connected to the first compensation terminal 130 and the second compensation terminal 140.

[0108] In some of these embodiments, the fifth adjustment element 175 is snap-connected to the first compensation terminal 130 and the second compensation terminal 140.

[0109] The number of the fifth adjustment elements 175 matches the number of the first compensation terminals 130. Generally, the number of the fifth adjustment elements 175 is not greater than the number of the first compensation terminals 130.

[0110] The number of the fifth adjustment elements 175 matches the number of the second compensation terminals 140. Generally, the number of the fifth adjustment elements 175 is not greater than the number of the second compensation terminals 140.

[0111] In some of these embodiments, there are several fifth adjustment elements 175. Both ends of the several fifth adjustment elements 175 are respectively connected to a first compensation terminal 130 and a second compensation terminal 140.

[0112] In some of these embodiments, the fifth adjustment element 175 is a copper sheet.

[0113] The usage method of the present utility model is as follows:

[0114] Connect the reactor compensation winding 110 to the first compensation terminal 130 through a cable, and connect the primary winding compensation winding 120 to the second compensation terminal 140 through a cable. Then, according to the actually measured error of the capacitive voltage transformer, change the connection modes of the first adjustment element 171, the second adjustment element 172, the third adjustment element 173, the fourth adjustment element 174, and the fifth adjustment element 175 with the first compensation terminal 130 and the second compensation terminal 140, and adjust the error compensation value to meet the standards and customer requirements.

[0115] The advantages of the present utility model are that by arranging a reactor compensation winding and a primary winding compensation winding inside the transformer, and connecting them to the first compensation terminal and the second compensation terminal on the outside through a cable, the error is adjusted by adjusting the connection mode of the adjustment unit. After the product is completely assembled, the error of the secondary winding can be adjusted without repeatedly opening the oil tank to adjust the error compensation wire, solving the problems such as the error performance of the secondary winding being worse than that of the traditional electromagnetic voltage transformer.

[0116] Embodiment 2

[0117] This embodiment is a supplementary embodiment of Embodiment 1.

[0118] As Figure 3 shown, the secondary winding error compensation device 100 further includes a first connection unit 180. Among them, the first connection unit 180 is respectively connected to the reactor compensation winding 110 and several first compensation terminals 130.

[0119] As Figure 4 shown, the first connection unit 180 includes a plurality of first connection elements 181. Among them, the plurality of first connection elements 181 are respectively connected to the reactor compensation winding 110 and a plurality of first compensation connection terminals 130.

[0120] The number of the first connection elements 181 matches the number of the first compensation connection terminals 130. Generally, the number of the first connection elements 181 is equal to the number of the first compensation connection terminals 130, that is, the first connection elements 181 and the first compensation connection terminals 130 are in one-to-one correspondence.

[0121] In some embodiments thereof, the number of the first connection elements 181 is 5.

[0122] In some embodiments thereof, the first connection element 181 includes, but is not limited to, a first connection cable.

[0123] Embodiment 3

[0124] This embodiment is a supplementary embodiment of Embodiments 1 to 2.

[0125] As Figure 5 shown, the secondary winding error compensation device 100 further includes a second connection unit 190. Among them, the second connection unit 190 is respectively connected to the primary winding compensation winding 120 and a plurality of second compensation connection terminals 140.

[0126] As Figure 6 shown, the second connection unit 190 includes a plurality of second connection elements 191. Among them, the plurality of second connection elements 191 are respectively connected to the primary winding compensation winding 120 and a plurality of second compensation connection terminals 140.

[0127] The number of the second connection elements 191 matches the number of the second compensation connection terminals 140. Generally, the number of the second connection elements 191 is equal to the number of the second compensation connection terminals 140, that is, the second connection elements 191 and the second compensation connection terminals 140 are in one-to-one correspondence.

[0128] In some embodiments thereof, the number of the second connection elements 191 is 10.

[0129] In some embodiments thereof, the second connection element 191 includes, but is not limited to, a second connection cable.

[0130] Embodiment 4

[0131] This embodiment is a supplementary embodiment of Embodiments 1 to 3.

[0132] As Figure 7As shown, the secondary winding error compensation device 100 further includes a secondary wiring unit 1100. Among them, the secondary wiring unit 1100 is provided with a plurality of first compensation wiring terminals 130, a plurality of second compensation wiring terminals 140, a plurality of transition terminals 150, and a grounding terminal 160.

[0133] As Figure 8 shown, the secondary wiring unit 1100 includes a secondary wiring board 1101 and a protective element 1102. Among them, the secondary wiring board 1101 is provided with a plurality of first compensation wiring terminals 130, a plurality of second compensation wiring terminals 140, a plurality of transition terminals 150, and a grounding terminal 160; the protective element 1102 is disposed outside the secondary wiring board 1101 and is detachably connected to the fuel tank for protecting the secondary wiring board 1101.

[0134] In some embodiments, the secondary wiring board 1101 is made of an insulating material.

[0135] In some embodiments, the connection manner between the protective element 1102 and the secondary wiring board 1101 includes but is not limited to bolt connection and snap connection.

[0136] In some embodiments, the protective element 1102 is a protective cover.

[0137] Furthermore, the secondary wiring unit 1100 further includes a plurality of secondary wiring terminals. Among them, the plurality of secondary wiring terminals are distributed on the secondary wiring board 1101.

[0138] In some embodiments, the connection manner between the secondary wiring terminals and the secondary wiring board 1101 includes but is not limited to screw connection.

[0139] Embodiment 5

[0140] This embodiment relates to the mutual inductor of the present utility model.

[0141] As Figure 9 shown, a kind of mutual inductor includes the secondary winding error compensation device 100 as described in any one of Embodiments 1 to 4.

[0142] Furthermore, the mutual inductor further includes an oil tank 200, a main iron core 300, a secondary winding 400, a primary winding 500, a reactor iron core 600, and a reactor winding 700. Among them, the main iron core 300 is disposed inside the oil tank 200, and a primary winding compensation winding 120 is wound around the outside of the main iron core 300; the secondary winding 400 is wound around the main iron core 300; the primary winding 500 is wound around the main iron core 300 and is located inside the primary winding compensation winding 120; the reactor iron core 600 is disposed inside the oil tank 200, and a reactor compensation winding 110 is wound around the outside of the reactor iron core 600; the reactor winding 700 is wound around the reactor iron core 600.

[0143] On the outer side of the oil tank 200, there are arranged a secondary wiring unit 1100, a first compensation wiring terminal 130, a second compensation wiring terminal 140, a transition terminal 150, a grounding terminal 160, and an adjustment unit 170.

[0144] The above are only the preferred embodiments of the present utility model, and do not limit the implementation manners and protection scope of the present utility model. For those skilled in the art, it should be realized that all the equivalent replacements and obvious changes made by using the description and illustrations of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A secondary winding error compensation device for a transformer, characterized in that: include: A reactor compensating winding, which is wound inside the reactor winding and is used to compensate for the phase difference of the secondary winding; A primary winding compensation winding, the primary winding compensation winding is wound inside the primary winding and is used to compensate for the ratio difference of the secondary winding; A plurality of first compensation terminals, wherein the plurality of first compensation terminals are respectively connected to the reactor compensation winding; A plurality of second compensation terminals, wherein the plurality of second compensation terminals are respectively connected to the primary winding compensation winding; A plurality of transition terminals, each of which is connected to the corresponding first compensation terminal; a grounding terminal, the grounding terminal being connected to the second compensation terminal; An adjustment unit is detachably connected to the first compensation terminals, the second compensation terminals, the transition terminal, and the grounding terminal, respectively, and is used to adjust the error compensation value of the reactor compensation winding and the primary winding compensation winding.

2. The secondary winding error compensation device according to claim 1, characterized in that: The adjustment unit comprises: At least one first adjustment element, wherein the first adjustment element is respectively connected to the corresponding at least two first compensation terminals; At least one second adjustment element, wherein the second adjustment element is respectively connected to the corresponding at least two second compensation terminals; at least one third adjustment element, wherein the third adjustment element is connected to the second compensation terminal and the transition terminal respectively; At least one fourth adjusting element, wherein the fourth adjusting element is respectively connected to the second compensation terminal and the ground terminal.

3. The secondary winding error compensation device according to claim 2, characterized in that: The adjustment unit also includes: At least one fifth adjusting element, wherein the fifth adjusting element is connected to the first compensation terminal and the second compensation terminal respectively.

4. The secondary winding error compensation device according to any one of claims 1 to 3, characterized in that: Also includes: a first connecting unit, wherein the first connecting unit is respectively connected to the reactor compensation winding and a plurality of the first compensation terminals; and / or A second connection unit, wherein the second connection unit is respectively connected to the primary winding compensation winding and a plurality of the second compensation terminals; and / or A secondary wiring unit is provided with a plurality of the first compensation terminals, a plurality of second compensation terminals, a plurality of transition terminals and a grounding terminal.

5. The secondary winding error compensation device according to claim 4, characterized in that: The first connecting unit includes: A plurality of first connecting elements are respectively connected to the reactor compensation winding and a plurality of first compensation terminals.

6. The secondary winding error compensation device according to claim 4, characterized in that: The second connecting unit includes: A plurality of second connecting elements are respectively connected to the primary winding compensation winding and a plurality of second compensation terminals.

7. The secondary winding error compensation device according to claim 4, characterized in that: The secondary wiring unit comprises: A secondary wiring board, wherein the secondary wiring board is provided with a plurality of the first compensation terminals, a plurality of the second compensation terminals, a plurality of the transition terminals, and the grounding terminal; A protection element is arranged on the outside of the secondary wiring board and is detachably connected to the oil tank to protect the secondary wiring board.

8. The secondary winding error compensation device according to claim 7, characterized in that: The secondary wiring unit also includes: A plurality of secondary wiring terminals are distributed on the secondary wiring board.

9. A mutual inductor, characterized in that: include: A secondary winding error compensation device as claimed in any one of claims 1 to 8.

10. The mutual inductor according to claim 9, characterized in that: Also includes: tank; A main iron core, the main iron core is arranged inside the oil tank, and the primary winding compensating winding is wound around the outside of the main iron core; A primary winding, the primary winding is arranged around the main iron core; A secondary winding, the secondary winding is arranged around the main iron core and is located inside the primary winding compensating winding; A reactor core, wherein the reactor core is arranged inside the oil tank, and the reactor compensation winding is wound around the outside of the reactor core; A reactor winding is arranged around the reactor core.

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