Method for calculating length of tapping line of on-load switch of transformer

Abstract

The invention provides a method for calculating the length of a tapping line of a transformer on-load switch, and belongs to the technical field of transformers. The invention provides a method for calculating the length of a tapping line of an on-load switch of a transformer. The method comprises the following operation steps: S1, n groups of tapping terminals of the on-load switch are distributed along the outer circumference of a selection switch; s2, the length of the on-load switch tapping wire between the n-th group of on-load switch tapping terminals and the fixing groove of the wire clamp is Ln, the distance between the n-th group of on-load switch tapping terminals and the fixing groove of the wire clamp in the long axis direction of the transformer is Xn, the distance between the n-th group of on-load switch tapping terminals and the fixing groove of the wire clamp in the short axis direction of the transformer is Yn, and the length of the on-load switch tapping wire between the n-th group of on-load switch tapping terminals and the fixing groove of the wire clamp is Ln; in the height direction of the transformer, the distance between the n-th group of on-load switch tapping terminals and the fixing groove of the wire clamp is Zn, and LK = Xn + Yn + Zn. According to the method for calculating the length of the on-load switch tapping line of the transformer, calculation is simple and rapid, and the calculated length of the on-load switch tapping line is moderate.

Description

Technical Field

[0001] The invention belongs to the technical field of transformers, and in particular relates to a method for calculating the length of a transformer on-load switch tap line. Background Art

[0002] The transformer is a commonly used power transmission and transformation device. The transformer is provided with a voltage regulating coil and an on-load switch (evenly distributed on the circle of the oil chamber or the selector switch). Generally, an on-load switch tapping line is used to connect the end of the voltage regulating coil and the on-load switch tapping terminal. The voltage regulating coil is arranged along the long axis direction of the transformer. The on-load switch is arranged on one side of the voltage regulating coil and is suspended at the end of the long axis of the body through the support iron of the clamp on the iron core. A wire clamp is arranged on the voltage regulating coil near the on-load switch. The wire clamp is provided with a fixing groove. The fixing groove of the wire clamp separates and fixes the on-load switch tapping line. The on-load switch tapping line is connected to the on-load switch tapping terminal, passes through the fixing groove of the wire clamp, and is connected to the end of the voltage regulating coil. The on-load switch tapping line is distributed around the on-load switch and is generally arranged in the form of a spiral rise or spiral descent. When connecting the on-load switch tap wire, it is necessary to first calculate and confirm the length of the on-load switch tap wire. A long on-load switch tap wire will lead to waste of raw materials. An on-load switch tap wire that is too long may become entangled. A short on-load switch tap wire cannot meet the connection requirements and needs to be connected or replaced, resulting in reduced processing efficiency and waste of raw materials. Summary of the invention

[0003] The object of the present invention is to provide a method for calculating the length of a transformer on-load switch tap line, aiming to solve the problem that the calculation of the on-load switch tap line length is inaccurate, resulting in reduced processing efficiency and waste of raw materials.

[0004] To achieve the above object, the technical solution adopted by the present invention is: to provide a method for calculating the length of the transformer on-load switch tap line, comprising the following steps: S1, n groups of on-load switch tap terminals are distributed along the outer circumference of the selector switch; S2, the length of the on-load switch tapping line between the nth group of on-load switch tapping terminals and the fixing groove of the wire clamp is L n , in the long axis direction of the transformer, the distance between the nth group of on-load switch tap terminals and the fixing slot of the conductor clamp is X n , in the short axis direction of the transformer, the distance between the nth group of on-load switch tap terminals and the fixing slot of the conductor clamp is Y n , in the height direction of the transformer, the distance between the nth group of on-load switch tap terminals and the fixing slot of the conductor clamp is Z n , L K =X n +Y n +Z n .

[0005] In a possible implementation, the on-load switch tapping terminal closest to the conductor clamp is the kth group, and the length of the on-load switch tapping line between the kth group of on-load switch tapping terminals and the fixing groove of the conductor clamp is L k , L k =X k +Y k +Z k .

[0006] In a possible implementation, the lengths of the on-load switch tapping wires between the remaining groups of on-load switch tapping terminals and the fixing grooves of the conductor clamps are L1, L2, and L3, respectively. … , L K-1 , L K+1 , … , L n , in the circumferential direction of the selector switch, the arc length between the remaining groups of on-load switch tap terminals and the Kth group of on-load switch tap terminals is l n , L n =L K +l n .

[0007] In a possible implementation, the n groups of on-load switch tap terminals are evenly distributed on the outer circumference of the selector switch, and the fixing grooves provided on the wire clamps are evenly arranged from top to bottom.

[0008] In a possible implementation, in the height direction of the transformer, from top to bottom, the on-load switch tap terminals and the fixing grooves of the conductor clamps are arranged in a one-to-one correspondence.

[0009] In a possible implementation, in the height direction of the transformer, the distances between the n groups of on-load switch tap terminals and the fixing grooves of the conductor clamps are all equal.

[0010] In a possible implementation, in the circumferential direction of the selector switch, the arc lengths between adjacent on-load switch tap terminals are equal to l0.

[0011] In a possible implementation, the diameter of the outer circumference of the selector switch is A, and after the on-load switch tap wire is wound around the outer side of the selector switch, the diameter increment generated is a, l0=(A+a)×∏÷n.

[0012] In a possible implementation, the value of a is greater than the diameter of the on-load switch tapping line.

[0013] In a possible implementation, the on-load switch tap wire spirally rises from the on-load switch tap terminal and is connected to the fixing groove of the wire clamp.

[0014] The beneficial effects of the method for calculating the length of the transformer on-load switch tapping line provided by the present invention are: Compared with the prior art, the present invention comprises the following steps: n groups of on-load switch tap terminals are distributed on the outer circumference of the selector switch, the length of the on-load switch tap wire between the on-load switch tap terminal and the fixing groove of the conductor clamp is Ln, and in the three-dimensional space, in the length direction of the transformer, the distance between the on-load switch tap terminal and the fixing groove of the conductor clamp is X n In the width direction of the transformer, the distance between the nth group of on-load switch tap terminals and the fixing slot of the conductor clamp is Y n , in the height direction of the transformer, the distance between the nth group of on-load switch tap terminals and the fixing slot of the conductor clamp is Z n , where the length of any set of on-load switch tapping lines is L n =X n +Y n +Z n , the length of the on-load switch tapping line L n It is greater than the straight-line distance between the on-load switch tap terminal and the fixing groove of the wire clamp, so as to avoid the on-load switch tap wire being too short, facilitate the installation of the on-load switch tap wire, and avoid the on-load switch tap wire being too long, thus reducing material consumption, and avoiding the interference of the long on-load switch tap wires with each other and the occurrence of knots. n , Y n , Z n It is easy to obtain, has low calculation difficulty, high calculation accuracy, high calculation efficiency and strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic diagram of the internal top view of the transformer used in an embodiment of the present invention; Figure 2 Schematic diagram of the internal structure of the transformer used in the embodiment of the present invention Figure 3 A schematic diagram of the distribution of the uploading switch tap terminals on the outer circumference of the selector switch used in the embodiment of the present invention; Figure 4 This is a schematic diagram of the kth group of on-load switch tapping lines of the on-load switch tapping terminals of phase A of the selector switch used in an embodiment of the present invention.

[0017] In the figure: 1. Selector switch; 2. On-load switch tapping terminal; 3. On-load switch tapping wire; 4. Wire clamp; 5. Fixing groove; 6. Support iron; 7. Core upper clamp; 8. Voltage regulating coil; 9. Transformer. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] Please refer to Figures 1 to 4 A specific implementation method of a method for calculating the length of a transformer on-load switch tapping line provided by the present invention is now described, comprising the following steps: S1, n groups of on-load switch tap terminals 2 are distributed along the outer circumference of the selector switch 1; S2, the length of the on-load switch tapping line 3 between the nth group of on-load switch tapping terminals 2 and the fixing groove 5 of the conductor clamp 4 is L n , in the long axis direction of the transformer 9, the distance between the nth group of on-load switch tapping terminals 2 and the fixing slot 5 of the conductor clamp 4 is X n , in the short axis direction of the transformer 9, the distance between the nth group of on-load switch tapping terminals 2 and the fixing slot 5 of the conductor clamp 4 is Y n , in the height direction of the transformer 9, the distance between the nth group of on-load switch tap terminals 2 and the fixing slot 5 of the conductor clamp 4 is Z n , L K =X n +Y n +Z n .

[0020] The present invention provides a method for calculating the length of a transformer on-load switch tap line, which comprises the following steps compared with the prior art: n groups of on-load switch tap terminals 2 are distributed on the outer circumference of a selector switch 1, and the length of an on-load switch tap line 3 between the on-load switch tap terminals 2 and a fixing groove 5 of a conductor clamp 4 is L n In the three-dimensional space, in the length direction of the transformer 9, the distance between the on-load switch tap terminal 2 and the fixing groove 5 of the conductor clamp 4 is X n In the width direction of the transformer 9, the distance between the nth group of on-load switch tapping terminals 2 and the fixing slot 5 of the conductor clamp 4 is Y n , in the height direction of the transformer 9, the distance between the nth group of on-load switch tap terminals 2 and the fixing slot 5 of the conductor clamp 4 is Z n , where the length L of any set of on-load switch tap lines 3 n =X n +Y n +Zn , the length L of the on-load switch tap line 3 n The distance between the on-load switch tapping terminal 2 and the fixing groove 5 of the wire clamp 4 is greater than the straight-line distance between the on-load switch tapping terminal 2 and the fixing groove 5 of the wire clamp 4, so as to avoid the on-load switch tapping line 3 being too short, facilitate the installation of the on-load switch tapping line 3, and avoid the on-load switch tapping line 3 being too long, thereby reducing material consumption, and avoiding the on-load switch tapping line 3 being too long to interfere with each other and avoid the occurrence of tangling. n , Y n , Z n It is easy to obtain, has low calculation difficulty, high calculation accuracy, high calculation efficiency and strong applicability.

[0021] For details, please refer to Figures 1 to 4 The voltage regulating coil 8 is arranged along the long axis direction of the transformer 9, the on-load switch is arranged on one side of the voltage regulating coil 8, and is suspended at the end of the long axis of the device body through the support iron 6 of the clamp 7 on the core, and n groups of on-load switch tap terminals 2 are distributed on the outer circumference of the selector switch 1. The n groups of on-load switch tap terminals 2 respectively lead out a on-load switch tap line 3 connected to the fixing groove 5 of the wire clamp 4, and the length of the corresponding n-th group of on-load switch tap lines 3 is L n , a three-dimensional rectangular coordinate system is established at the nth group of on-load switch tapping line 3, the X axis of the established three-dimensional rectangular coordinate system is parallel to the length direction of the transformer 9, the Y axis of the established three-dimensional rectangular coordinate system is parallel to the width direction of the transformer 9, and the Z axis of the established three-dimensional rectangular coordinate system is parallel to the height direction of the transformer 9. In the X-axis direction, the distance between the nth group of on-load switch tapping terminal 2 and the fixing groove 5 of the wire clamp 4 is X. n In the Y-axis direction, the distance between the nth group of on-load switch tapping terminals 2 and the fixing slot 5 of the conductor clamp 4 is Y n In the Z-axis direction, the distance between the nth group of on-load switch tap terminals 2 and the fixing slot 5 of the conductor clamp 4 is Z n According to the characteristics of triangles, in the three-dimensional rectangular coordinate system, X n , Y n , Z n The sum of the three is greater than the straight-line distance between the on-load switch tap terminal 2 and the fixing slot 5 of the conductor clamp 4, and X n , Y n , Z n The difference between the sum of the three and the straight-line distance between the load switch tap terminal and the fixing slot 5 of the wire clamp 4 is small, which avoids the situation that the load switch tap line 3 is too short, facilitates the installation of the load switch tap line 3, and avoids the situation that the load switch tap line 3 is too long, reduces material consumption, and avoids the interference of the overly long load switch tap lines 3, and avoids the occurrence of knots. n , Y n , Z nIt is easy to obtain, has low calculation difficulty, high calculation accuracy, high calculation efficiency and strong applicability.

[0022] As a specific implementation method of the method for calculating the length of the transformer on-load switch tapping line provided by the present invention, please refer to Figures 1 to 4 The on-load switch tapping terminal 2 closest to the conductor clamp 4 is the kth group, and the length of the on-load switch tapping line 3 between the kth group of on-load switch tapping terminal 2 and the fixing groove 5 of the conductor clamp 4 is L k , L k =X k +Y k +Z k .

[0023] For details, please refer to Figures 1 to 4 , define the on-load switch tap terminal 2 closest to the conductor clamp 4 as the kth group of on-load switch tap terminals 2, and the length of the on-load switch tap line 3 of the kth group of on-load switch tap terminals 2 is L k , the corresponding L k =X k +Y k +Z k .

[0024] As a specific implementation method of the method for calculating the length of the transformer on-load switch tapping line provided by the present invention, please refer to Figures 1 to 4 The lengths of the on-load switch tapping wires 3 between the on-load switch tapping terminals 2 and the fixing grooves 5 of the conductor clamps 4 of the remaining groups are L1, … , L K-1 , L K+1 , … , L n , in the circumferential direction of the selector switch 1, the arc length between the remaining groups of on-load switch tap terminals 2 and the Kth group of on-load switch tap terminals 2 is l n , L n =L K +l n .

[0025] For details, please refer to Figures 1 to 4 , taking the kth group of on-load switch tapping terminal 2 as the initial analysis position, the lengths of the remaining n-1 groups of on-load switch tapping lines 3 excluding the kth group of on-load switch tapping terminal 2 are L1, … , L K-1 , L K+1 , … , L n , the remaining n-1 groups of on-load switch tapping lines 3 have an increment relative to the kth group of on-load switch tapping lines 3 during the connection process, and the arc length between the remaining n-1 groups of on-load switch tapping terminals 2 and the kth group of on-load switch tapping terminals 2 is l n , with ln As the difference between the group of on-load switch tapping wires 3 and the kth group of on-load switch tapping wires 3, the remaining n-1 groups of on-load switch tapping terminals 2 connecting the fixing slots 5 of the wire clamps 4 need to bypass a part of the outer circumference of the selector switch 1 with an arc length l n As the growth value between the group of on-load switch tap lines 3 and the kth group of on-load switch tap lines 3, the growth requirement of the group of on-load switch tap lines 3 relative to the kth group of on-load switch tap lines 3 is met, and the growth size is limited, which will not cause the group of on-load switch tap lines 3 to be too long. The arc length l n It is easy to obtain, has low calculation difficulty, high calculation accuracy, high calculation efficiency and strong applicability.

[0026] As a specific implementation method of the method for calculating the length of the transformer on-load switch tapping line provided by the present invention, please refer to Figures 1 to 4 , n groups of on-load switch tap terminals 2 are evenly distributed on the outer circumference of the selector switch 1, and the fixing grooves 5 provided on the wire clamps 4 are evenly arranged from top to bottom.

[0027] For details, please refer to Figures 1 to 4 , the n groups of on-load switch tap terminals 2 on the outer circumference of the selection switch 1 are evenly distributed, and correspondingly, the fixing grooves 5 provided on the wire clamps 4 are evenly arranged from top to bottom, which is conducive to the arc length l between the remaining n-1 groups of on-load switch tap terminals 2 and the Kth group of on-load switch tap terminals 2 n to obtain.

[0028] As a specific implementation method of the method for calculating the length of the transformer on-load switch tapping line provided by the present invention, please refer to Figures 1 to 4 In the height direction of the transformer 9, from top to bottom, the on-load switch tapping terminal 2 and the fixing groove 5 of the wire clamp 4 are arranged one by one.

[0029] For details, please refer to Figures 1 to 4 In the height direction of the transformer 9, the on-load switch tap terminals 2 from top to bottom are respectively connected to the fixing grooves 5 of the wire clamps 4 from top to bottom, and the on-load switch tap terminals 2 and the fixing grooves 5 of the wire clamps 4 are arranged one by one.

[0030] As a specific implementation method of the method for calculating the length of the transformer on-load switch tapping line provided by the present invention, please refer to Figures 1 to 4 In the height direction of the transformer 9, the distances between the n groups of on-load switch tap terminals 2 and the fixing grooves 5 of the conductor clamps 4 are all equal.

[0031] For details, please refer to Figures 1 to 4 In the Z-axis direction, the height difference between the tapping terminal 2 of any group of on-load switch and the fixing groove 5 of the conductor clamp 4 is equal, that is, the Z-axis difference between the tapping terminals 2 of n groups of on-load switch is equal to the height difference between the tapping terminals 2 of n groups of on-load switch. nThe on-load switch tap lines 3 are equal, which is convenient for calculation, reduces the difficulty of calculation, facilitates the connection of the on-load switch tap lines 3, avoids entanglement and knotting between the on-load switch tap lines 3, and avoids the situation where one or several groups of on-load switch tap lines 3 are too long.

[0032] As a specific implementation method of the method for calculating the length of the transformer on-load switch tapping line provided by the present invention, please refer to Figures 1 to 4 , in the circumferential direction of the selector switch 1, the arc length between adjacent on-load switch tap terminals 2 is equal to l0.

[0033] For details, please refer to Figures 1 to 4 In the circumferential direction of the selection switch 1, the on-load switch tap terminals 2 are evenly distributed, and the arc lengths between adjacent on-load switch tap terminals 2 are equal. The arc length is defined as l0, which is convenient for calculation and reduces the difficulty of calculation.

[0034] As a specific implementation method of the method for calculating the length of the transformer on-load switch tapping line provided by the present invention, please refer to Figures 1 to 4 The diameter of the outer circumference of the selector switch 1 is A. After the on-load switch tap wire 3 is wound around the outside of the selector switch 1, the resulting diameter increment is a, l0= (A+a)×∏÷n.

[0035] For details, please refer to Figures 1 to 4 The diameter of the outer circumference of the selector switch 1 is A. After the on-load switch tap wire 3 is installed, it bypasses part of the outer side wall of the selector switch 1. The on-load switch tap wire 3 causes a diameter increment a. The diameter of the on-load switch tap wire 3 wrapped around part of the outer side wall of the selector switch 1 is used to calculate the arc length l0. The n groups of on-load switch tap terminals 2 divide the outer circumference of the selector switch 1 into n parts, so l0=(A+a)×∏÷n.

[0036] As a specific implementation method of the method for calculating the length of the transformer on-load switch tapping line provided by the present invention, please refer to Figures 1 to 4 , the value of a is greater than the diameter of the on-load switch tapping line 3.

[0037] For details, please refer to Figures 1 to 4 , the diameter increment a generated by the on-load switch tap wire 3 being wound around the outer side wall of the selector switch 1, the value of a is greater than the diameter of the on-load switch tap wire 3, the value of a is determined according to the diameter of the on-load switch tap wire 3, when the diameter of the on-load switch tap wire 3 is larger, the bending radius required by the on-load switch tap wire 3 is also larger, then the difference between a and the diameter of the on-load switch tap wire 3 is larger, when the diameter of the on-load switch tap wire 3 is smaller, the bending radius required by the on-load switch tap wire 3 is also smaller, then the difference between a and the diameter of the on-load switch tap wire 3 is smaller.

[0038] As a specific implementation method of the method for calculating the length of the transformer on-load switch tapping line provided by the present invention, please refer to Figures 1 to 4 The on-load switch tap wire 3 spirally rises from the on-load switch tap terminal 2 and is connected to the fixing groove 5 of the wire clamp 4.

[0039] For details, please refer to Figures 1 to 4 The on-load switch tap wire 3 is spirally ascended from the on-load switch tap terminal 2 to the fixing groove 5 of the wire clamp 4, that is, the position of the on-load switch tap wire 3 at the on-load switch tap terminal 2 is lower than its position in the fixing groove 5 of the wire clamp 4, which is convenient for connecting the on-load switch tap wire 3.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for calculating the length of a transformer on-load switch tap line, characterized in that: The steps are as follows: S1, n groups of on-load switch tap terminals are distributed along the outer circumference of the selector switch; S2, the length of the on-load switch tapping line between the nth group of on-load switch tapping terminals and the fixing groove of the wire clamp is L n , in the long axis direction of the transformer, the distance between the nth group of on-load switch tap terminals and the fixing slot of the conductor clamp is X n , in the short axis direction of the transformer, the distance between the nth group of on-load switch tap terminals and the fixing slot of the conductor clamp is Y n , in the height direction of the transformer, the distance between the nth group of on-load switch tap terminals and the fixing slot of the conductor clamp is Z n , L K =X n +Y n +Z n .

2. A method for calculating the length of a transformer on-load switch tap line according to claim 1, characterized in that: The on-load switch tapping terminal closest to the conductor clamp is the kth group, and the length of the on-load switch tapping line between the kth group of on-load switch tapping terminals and the fixing groove of the conductor clamp is L. k , L k =X k +Y k +Z k .

3. A method for calculating the length of a transformer on-load switch tap line according to claim 2, characterized in that: The lengths of the on-load switch tapping wires between the on-load switch tapping terminals and the fixing slots of the wire clamps of the remaining groups are L1, … , L K-1 , L K+1 , … , L n , in the circumferential direction of the selector switch, the arc length between the remaining groups of on-load switch tap terminals and the Kth group of on-load switch tap terminals is l n , L n =L K +l n .

4. A method for calculating the length of a transformer on-load switch tap line according to claim 3, characterized in that: The n groups of on-load switch tapping terminals are evenly distributed on the outer circumference of the selector switch, and the fixing grooves arranged on the wire clamps are evenly arranged from top to bottom.

5. A method for calculating the length of a transformer on-load switch tap line according to claim 4, characterized in that: In the height direction of the transformer, from top to bottom, the on-load switch tap terminals and the fixing grooves of the wire clamps are arranged one by one.

6. A method for calculating the length of a transformer on-load switch tap line according to claim 5, characterized in that: In the height direction of the transformer, the distances between the n groups of on-load switch tap terminals and the fixing grooves of the conductor clamps are all equal.

7. A method for calculating the length of a transformer on-load switch tap line according to claim 6, characterized in that: In the circumferential direction of the selector switch, the arc length between adjacent on-load switch tap terminals is equal to l0.

8. A method for calculating the length of a transformer on-load switch tap line according to claim 7, characterized in that: The diameter of the outer circumference of the selector switch is A. After the on-load switch tap wire is wound around the outside of the selector switch, the resulting diameter increment is a, l0= (A+a)×∏÷n.

9. A method for calculating the length of a transformer on-load switch tap line according to claim 8, characterized in that: The value of a is greater than the diameter of the on-load switch tapping line.

10. A method for calculating the length of a transformer on-load switch tap line according to claim 1, characterized in that: The on-load switch tapping wire spirally rises from the on-load switch tapping terminal and is connected to the fixing groove of the wire clamp.

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