Wiring method for changing phase shift direction

Abstract

The invention provides a wiring method for changing a phase shifting direction, and belongs to the technical field of transformers. The invention provides a wiring method for changing a phase shifting direction, which comprises the following operation steps: winding two groups of transformer bodies of a transformer, namely a first transformer body and a second transformer body, the first transformer body and the second transformer body are consistent in electrical turn number and winding size, consistent in lead structure, same in degree of phase shifting angle, and opposite in positive and negative; the A-phase coil of the high-voltage side winding of the second device body is connected with the A phase of the power supply, the B-phase coil of the high-voltage side winding of the second device body is connected with the C phase of the power supply, and the C-phase coil of the high-voltage side winding of the second device body is connected with the B phase of the power supply. According to the wiring method for changing the phase shift direction, the lead structures of the first device body and the second device body are the same, the phase sequence of the second device body is adjusted, the phase shift direction of the second device body and the phase shift direction of the first device body are different, the wiring method is simple and easy to implement, wiring disorder is avoided, and the production efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of transformers, and in particular relates to a wiring method for changing a phase shift direction. Background Art

[0002] Phase-shifting transformers are widely used in power conversion technology and are widely used in engineering construction. In multi-phase pulse rectification, the phase-shifting transformer decomposes a set of symmetrical three-phase sinusoidal voltages into multiple sets of three-phase voltages with phase differences and further rectifies them. With the increasing demand for high-power output, in order to increase the output voltage and reduce the impact of harmonics on users, the number of windings of the phase-shifting transformer for power supply has gradually increased. Phase-shifting rectifier transformers are developing in the direction of large capacity and multiple windings. In the box of a large-capacity multi-pulse phase-shifting rectifier transformer, a double body is often set. The two sets of bodies are connected in parallel. The phase shift angles of the windings of the two sets of bodies can be set accordingly, and the lead connections of the two sets of body windings are different. During the winding process, there are too many leads, which can easily cause wiring errors during the connection process, resulting in reduced production efficiency. Summary of the invention

[0003] The object of the present invention is to provide a wiring method for changing the phase shift direction, aiming to solve the problem of low efficiency of positive and negative angle phase shift wiring of two groups of body of large-capacity multi-pulse phase-shifting rectifier transformer.

[0004] To achieve the above object, the technical solution adopted by the present invention is: to provide a wiring method for changing the phase shift direction, comprising the following steps: S1. Two sets of transformer bodies are wound, namely, the first transformer body and the second transformer body. The first transformer body and the second transformer body have the same number of electrical turns and winding size, the same lead structure, the same degree of phase shift angle, and opposite positive and negative; S2, the A-phase coil of the high-voltage side winding of the second device body is connected to the A-phase of the power supply, the B-phase coil of the high-voltage side winding of the second device body is connected to the C-phase of the power supply, and the C-phase coil of the high-voltage side winding of the second device body is connected to the B-phase of the power supply.

[0005] In one possible implementation, the A-phase coil of the high-voltage side winding of the first device body is connected to the A-phase of the power supply, the B-phase coil of the high-voltage side winding of the first device body is connected to the B-phase of the power supply, and the C-phase coil of the high-voltage side winding of the first device body is connected to the C-phase of the power supply.

[0006] In a possible implementation, the first device body adopts a positive angle phase shift, and the second device body adopts a negative angle phase shift.

[0007] In a possible implementation, the high voltage side of the first device body adopts a star connection, and the high voltage side of the second device body adopts a star connection.

[0008] In a possible implementation, the low-pressure side of the first device body adopts an extended triangle connection method, and the low-pressure side of the second device body adopts an extended triangle connection method.

[0009] In one possible implementation, the A-phase coil on the high-voltage side of the first body is led out to terminal A1, which is connected to phase A of the power supply, the B-phase coil is led out to terminal B1, which is connected to phase B of the power supply, and the C-phase coil is led out to terminal C1, which is connected to phase C of the power supply.

[0010] In one possible implementation, the a-phase coil on the low-voltage side of the first body has lead-out terminals a1, a1', x1', the b-phase coil has lead-out terminals b1, b1', y1', and the c-phase coil has lead-out terminals c1, c1', z1', a1' is connected to y1', b1' is connected to z1', and c1' is connected to x1'.

[0011] In one possible implementation, the A-phase coil on the high-voltage side of the second body is led out to terminal A2, which is connected to phase A of the power supply, the B-phase coil is led out to terminal B2, which is connected to phase C of the power supply, and the C-phase coil is led out to terminal C2, which is connected to phase B of the power supply.

[0012] In one possible implementation, the a-phase coil on the low-voltage side of the second body has lead-out terminals a2, a2', x2', the b-phase coil has lead-out terminals c2, c2', z2', the c-phase coil has lead-out terminals b2, b2', y2', a2' is connected to z2', c2' is connected to y2', and b2' is connected to x2'.

[0013] The beneficial effects of a wiring method for changing the phase shift direction provided by the present invention are: Compared with the prior art, the transformer is provided with two groups of bodies, namely the first body and the second body. The number of electrical turns and the winding size of the first body are consistent with the number of electrical turns and the winding size of the second body. The degree of the phase shift angle of the first body is the same as the degree of the phase shift angle of the second body. The direction of the phase shift angle of the first body is opposite to the direction of the phase shift angle of the second body. The high-voltage side winding of the second body includes an A-phase coil, a B-phase coil and a C-phase coil. The A-phase coil of the second body is connected to the A-phase of the power supply, the B-phase coil of the second body is connected to the C-phase of the power supply, and the C-phase coil of the second body is connected to the B-phase of the power supply, which changes the phase sequence of the connection between the coil of the second body and the power supply, so that the phase shift direction of the second body is different from that of the first body. It is simple and easy to operate, avoids wiring confusion, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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.

[0015] Figure 1 A schematic diagram of phase shift of a first device body used in an embodiment of the present invention; Figure 2 A schematic diagram of the connection of the first body used in an embodiment of the present invention; Figure 3 A schematic diagram of the phase shift of the second device body used in the embodiment of the present invention; Figure 4 This is a schematic diagram of the connection of the second body used in the embodiment of the present invention. DETAILED DESCRIPTION

[0016] 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.

[0017] Please refer to Figures 1 to 4 A specific implementation of a wiring method for changing the phase shift direction provided by the present invention is now described, including the following steps: S1. Two sets of transformer bodies are arranged in the transformer box, and the two sets of transformer bodies are wound. The two sets of transformer bodies are respectively the first transformer body and the second transformer body. The first transformer body and the second transformer body have the same number of electrical turns and winding size, the same lead structure, the same degree of phase shift angle, and opposite positive and negative. The first transformer body adopts positive angle phase shift, and the second transformer body adopts negative angle phase shift; S2. The high-voltage side of the first device body adopts star connection. The first device body includes an A1 core column, a B1 core column and a C1 core column. The A-phase coil of the high-voltage side winding of the first device body is wound on the A1 core column, and the A-phase coil leads to the connection terminal A1, and the connection terminal A1 is connected to the A phase of the power supply. The B-phase coil of the high-voltage side winding of the first device body is wound on the B1 core column, and the B-phase coil leads to the connection terminal B1, and the connection terminal B1 is connected to the B phase of the power supply. The C-phase coil of the high-voltage side winding of the first device body is wound on the C1 core column, and the C-phase coil leads to the connection terminal C1, and the connection terminal C1 is connected to the C phase of the power supply. phase; the high-voltage side of the second body adopts star connection, and the second body includes A2 core column, B2 core column and C2 core column. The A-phase coil of the high-voltage side winding of the second body is wound on the A2 core column, and the A-phase coil leads to the terminal A2, and the terminal A2 is connected to the A phase of the power supply. The B-phase coil of the high-voltage side winding of the second body is wound on the C1 core column, and the B-phase coil leads to the terminal B2, and the terminal B2 is connected to the C phase of the power supply. The C-phase coil of the high-voltage side winding of the second body is wound on the B2 core column, and the C-phase coil leads to the terminal C2, and the terminal C2 is connected to the B phase of the power supply.

[0018] For further information, please refer to Figure 1 , Figure 2 The a-phase coil on the low-voltage side of the first device body is wound on the outside of the A1 core column. The a-phase coil of the first device body includes a group of phase-shifting coils and a group of basic coils. The phase-shifting coils and the basic coils are arranged in series from top to bottom. The terminal a1 is arranged at the outlet of the phase-shifting coil. The terminal a1' is arranged between the phase-shifting coil and the basic coil. The terminal x1' is arranged at the inlet of the basic coil. The b-phase coil on the low-voltage side of the first device body is wound on the outside of the B1 core column. The b-phase coil of the first device body includes a group of phase-shifting coils and a group of basic coils. The phase-shifting coils and the basic coils are arranged in series from top to bottom. The terminal b1 is arranged at the outlet of the phase-shifting coil. Terminal b1' is arranged between the phase-shifting coil and the basic coil, terminal y1' is arranged at the incoming end of the basic coil, the c-phase coil on the low-voltage side of the first device body is wound on the outside of the C1 core column, the c-phase coil of the first device body includes a group of phase-shifting coils and a group of basic coils, the phase-shifting coil and the basic coil are arranged in series from top to bottom, terminal c1 is arranged at the outgoing end of the phase-shifting coil, terminal c1' is arranged between the phase-shifting coil and the basic coil, terminal z1' is arranged at the incoming end of the basic coil, terminal a1' is connected to terminal y1', terminal b1' is connected to terminal z1', and terminal c1' is connected to terminal x1'.

[0019] For further information, please refer to Figure 3 , Figure 4The a-phase coil on the low-voltage side of the second device body is wound on the outside of the A2 core column. The a-phase coil of the second device body includes a group of phase-shifting coils and a group of basic coils. The phase-shifting coils and the basic coils are arranged in series from top to bottom. The terminal a2 is arranged at the outlet of the phase-shifting coil. The terminal a2' is arranged between the phase-shifting coil and the basic coil. The terminal x2' is arranged at the inlet of the basic coil. The c-phase coil on the low-voltage side of the second device body is wound on the outside of the B2 core column. The c-phase coil of the second device body includes a group of phase-shifting coils and a group of basic coils. The phase-shifting coils and the basic coils are arranged in series from top to bottom. The terminal c2 is arranged at the outlet of the phase-shifting coil. Terminal c2' is arranged between the phase-shifting coil and the basic coil, terminal z2' is arranged at the incoming end of the basic coil, the b-phase coil on the low-voltage side of the second body is wound on the outside of the C2 core column, the b-phase coil of the second body includes a group of phase-shifting coils and a group of basic coils, the phase-shifting coil and the basic coil are arranged in series from top to bottom, terminal b2 is arranged at the outgoing end of the phase-shifting coil, terminal b2' is arranged between the phase-shifting coil and the basic coil, terminal y2' is arranged at the incoming end of the basic coil, terminal a2' is connected to terminal z2', terminal c2' is connected to terminal y2', and terminal b2' is connected to terminal x2'.

[0020] The present invention provides a wiring method for changing the phase shift direction. Compared with the prior art, the transformer is provided with two groups of bodies, namely a first body and a second body. The number of electrical turns and the winding size of the first body are consistent with the number of electrical turns and the winding size of the second body. The degree of the phase shift angle of the first body is the same as the degree of the phase shift angle of the second body. The direction of the phase shift angle of the first body is opposite to the direction of the phase shift angle of the second body. The high-voltage side winding of the second body includes an A-phase coil, a B-phase coil and a C-phase coil. The A-phase coil of the second body is connected to the A-phase of a power supply, the B-phase coil of the second body is connected to the C-phase of the power supply, and the C-phase coil of the second body is connected to the B-phase of the power supply. The phase sequence of the connection between the coil of the second body and the power supply is changed, so that the phase shift direction of the second body is different from that of the first body. The method is simple and easy to operate, avoids wiring confusion, and improves production efficiency.

[0021] Optionally, when the phase sequence of the second body is consistent with that of the first body, the second body serves as a spare body; when the phase sequence of phase B and phase C of the second body is opposite to the phase sequence of phase B and phase C of the first body, the second body is used as a body with a phase shift angle opposite to that of the first body. The function of the second body can be changed by changing the connection of the second body according to actual needs.

[0022] 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 wiring method for changing the phase shift direction, characterized in that: The steps are as follows: S1. Two sets of transformer bodies are wound, namely, the first transformer body and the second transformer body. The first transformer body and the second transformer body have the same number of electrical turns and winding size, the same lead structure, the same degree of phase shift angle, and opposite positive and negative; S2, the A-phase coil of the high-voltage side winding of the second device body is connected to the A-phase of the power supply, the B-phase coil of the high-voltage side winding of the second device body is connected to the C-phase of the power supply, and the C-phase coil of the high-voltage side winding of the second device body is connected to the B-phase of the power supply.

2. A wiring method for changing the phase shift direction as claimed in claim 1, characterized in that: The A-phase coil of the high-voltage side winding of the first device body is connected to the A-phase of the power supply, the B-phase coil of the high-voltage side winding of the first device body is connected to the B-phase of the power supply, and the C-phase coil of the high-voltage side winding of the first device body is connected to the C-phase of the power supply.

3. A wiring method for changing the phase shift direction as claimed in claim 2, characterized in that: The first body adopts positive angle phase shifting, and the second body adopts negative angle phase shifting.

4. A wiring method for changing the phase shift direction as claimed in claim 2, characterized in that: The high voltage side of the first body is connected in star connection, and the high voltage side of the second body is connected in star connection.

5. A wiring method for changing the phase shift direction as claimed in claim 4, characterized in that: The low-pressure side of the first device body adopts the extended triangle connection method, and the low-pressure side of the second device body adopts the extended triangle connection method.

6. A wiring method for changing the phase shift direction as claimed in claim 5, characterized in that: The A-phase coil on the high-voltage side of the first body leads to terminal A1, which is connected to phase A of the power supply, the B-phase coil leads to terminal B1, which is connected to phase B of the power supply, and the C-phase coil leads to terminal C1, which is connected to phase C of the power supply.

7. A wiring method for changing the phase shift direction as claimed in claim 6, characterized in that: The a-phase coil on the low-voltage side of the first body leads out the connection terminals a1, a1', x1', the b-phase coil leads out the connection terminals b1, b1', y1', and the c-phase coil leads out the connection terminals c1, c1', z1', a1' is connected to y1', b1' is connected to z1', and c1' is connected to x1'.

8. A wiring method for changing the phase shift direction as claimed in claim 5, characterized in that: The A-phase coil on the high-voltage side of the second body leads to terminal A2, which is connected to phase A of the power supply; the B-phase coil leads to terminal B2, which is connected to phase C of the power supply; the C-phase coil leads to terminal C2, which is connected to phase B of the power supply.

9. A wiring method for changing the phase shift direction as claimed in claim 8, characterized in that: The a-phase coil on the low-voltage side of the second body leads out the connection terminals a2, a2', x2', the b-phase coil leads out the connection terminals c2, c2', z2', the c-phase coil leads out the connection terminals b2, b2', y2', a2' is connected to z2', c2' is connected to y2', and b2' is connected to x2'.

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