Arrangement of a single-phase autotransformer with variable magnetic flux

Abstract

The utility model discloses a kind of arrangement structure of single-phase self-coupling variable magnetic flux voltage regulation transformer, specifically related to transformer field, single-phase self-coupling variable magnetic flux voltage regulation transformer includes oil tank, the both sides of oil tank are respectively equipped with high-voltage side and low-voltage side, the inside of oil tank is equipped with high-voltage winding and medium-voltage winding, high-voltage winding is composed of series coil, common coil, voltage regulating coil, and medium-voltage winding is composed of common coil, voltage regulating coil.The utility model is by being equipped with in high-voltage side with high-voltage winding outlet line, medium-voltage winding outlet line and neutral point outlet line, winding does not appear half turn problem, voltage deviation rate will be reduced accordingly, high-voltage winding outlet line and medium-voltage winding outlet line are respectively close to access high-pressure bushing and medium-pressure bushing, neutral point lead wire is led out from switch, such lead wire arrangement is simple, prevent outlet lead wire intersection, voltage regulating coil is arranged on iron core side column, coil is less on iron core main column, electrical calculation short-circuit impedance is relatively easy, reduce interference term.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer technical field more specifically, the utility model relates to a kind of arrangement structure of single-phase autotransformer variable flux voltage regulating transformer. BACKGROUND

[0002] Single-phase autotransformer conventional voltage regulating mode has constant flux voltage regulating mode and variable flux voltage regulating mode two kinds.Constant flux voltage regulating mode is arranged in series coil and common coil between switch, voltage regulating when the number of turns of high voltage winding does not change, flux does not change.Variable flux voltage regulating mode is arranged in common coil terminal neutral point at switch, voltage regulating when the number of turns of high voltage winding changes, flux also changes.

[0003] In prior art, neutral point variable flux voltage regulating mode is selected in transformer of part area power grid in south, compared with end voltage regulating mode, the advantage of neutral point variable flux voltage regulating mode is that switch is arranged at neutral point, voltage level of neutral point is lower than common coil end, can reduce the insulation level requirement of switch, thereby reducing tap lead insulation level, and insulation distance of lead is easy to guarantee.

[0004] Because of the arrangement structure of existing single-phase autotransformer variable flux voltage regulating transformer, high voltage winding outlet, medium voltage winding outlet and neutral point outlet are not on the same side, so that half-turn problem occurs in winding, which leads to corresponding increase of voltage deviation rate. UTILITY MODEL CONTENTS

[0005] The arrangement structure of single-phase autotransformer variable flux voltage regulating transformer provided by the utility model solves the problem that, in the arrangement structure of existing single-phase autotransformer variable flux voltage regulating transformer, high voltage winding outlet, medium voltage winding outlet and neutral point outlet are not on the same side, so that half-turn problem occurs in winding.

[0006] To achieve the above object, the utility model provides the following technical scheme: an arrangement structure of single-phase autotransformer variable flux voltage regulating transformer, the single-phase autotransformer variable flux voltage regulating transformer includes an oil tank, the two sides of the oil tank are respectively provided with a high-voltage side and a low-voltage side, a high-voltage winding and a medium-voltage winding are installed in the oil tank, the high-voltage winding is composed of a series coil, a common coil and a voltage regulating coil, the medium-voltage winding is composed of the common coil and the voltage regulating coil, a neutral point is arranged at the end of the high-voltage winding and the end of the medium-voltage winding, a high-voltage winding outlet is connected to the output end of the high-voltage winding, a medium-voltage winding outlet is connected to the output end of the medium-voltage winding, a neutral point outlet is connected to the output end of the neutral point, and the high-voltage winding outlet, the medium-voltage winding outlet and the neutral point outlet are located on the high-voltage side of the oil tank.

[0007] In a preferred embodiment, the inside of the oil tank is provided with a core, the core comprises a core main column and a core side column, the core side column is located at one side of the core main column, the series connection coil and the common coil are arranged on the core main column, and the voltage regulation coil is arranged on the core side column.

[0008] In a preferred embodiment, a medium voltage sleeve is arranged between the core main column and the core side column, the medium voltage sleeve is located at the high voltage side of the oil tank, and the medium voltage winding outlet is connected with the medium voltage sleeve.

[0009] In a preferred embodiment, the high voltage side of the oil tank is further provided with a switch, the switch is located outside the medium voltage sleeve, and the voltage regulation lead connection line is connected with the voltage regulation coil outlet through the switch.

[0010] In a preferred embodiment, a voltage regulation lead connection line is connected between the core main column and the switch, and the voltage regulation lead connection line is wound around the side of the medium voltage sleeve away from the core side column.

[0011] In a preferred embodiment, a neutral point sleeve is arranged at the low voltage side of the oil tank, and a neutral point lead is connected between the switch and the neutral point sleeve.

[0012] In a preferred embodiment, the output end of the high voltage winding outlet is provided with a high voltage sleeve, and the high voltage sleeve is located at the high voltage side of the oil tank.

[0013] The beneficial effects of the utility model lie in:

[0014] The utility model discloses a high voltage winding outlet, medium voltage winding outlet and neutral point outlet are all arranged at the high voltage side, so that the winding does not have half-turn problem, the voltage deviation rate is reduced correspondingly, the high voltage winding outlet and the medium voltage winding outlet are connected to the high voltage sleeve and the medium voltage sleeve respectively, the neutral point lead is drawn from the switch and connected to the neutral point sleeve, so that the lead arrangement is simple, the outlet lead crossing is prevented, the voltage regulation coil is arranged on the core side column, the coil on the core main column is less, the electrical calculation short-circuit impedance is easier, and the interference term is reduced. DRAWINGS

[0015] Fig. 1 It is the variable magnetic flux voltage regulation wiring diagram of the utility model.

[0016] Fig. 2 It is the variable magnetic flux voltage regulation transformer arrangement method plan view of the utility model.

[0017] Fig. 3 It is the variable magnetic flux voltage regulation transformer arrangement method front view of the utility model.

[0018] The reference signs are: 1, oil tank; 2, core main column; 3, core side column; 4, series coil; 5, common coil; 6, voltage regulating coil; 7, high-voltage winding outlet; 8, high-voltage sleeve; 9, medium-voltage winding outlet; 10, medium-voltage sleeve; 11, voltage regulating lead connecting line; 12, voltage regulating coil outlet; 13, switch; 14, neutral point lead; 15, neutral point sleeve. DETAILED DESCRIPTION

[0019] The application will be further described in detail below with reference to the accompanying drawings. It is necessary to point out here that the following detailed description is only used to further illustrate the application and cannot be understood as limiting the scope of protection of the application. Those skilled in the art can make some non-essential improvements and adjustments to the application according to the above application content.

[0020] Referring to the drawings Figs. 1 to 3 The arrangement structure of the single-phase self-coupling variable magnetic flux voltage regulating transformer comprises an oil tank 1, high-voltage and low-voltage sides are respectively arranged on both sides of the oil tank 1, a high-voltage winding and a medium-voltage winding are arranged in the oil tank 1, the high-voltage winding is composed of a series coil 4, a common coil 5 and a voltage regulating coil 6, the medium-voltage winding is composed of the common coil 5 and the voltage regulating coil 6, a neutral point is arranged at the end of the high-voltage winding and the end of the medium-voltage winding, a high-voltage winding outlet 7 is connected to the output end of the high-voltage winding, a medium-voltage winding outlet 9 is connected to the output end of the medium-voltage winding, a neutral point outlet is connected to the output end of the neutral point, and the high-voltage winding outlet 7, the medium-voltage winding outlet 9 and the neutral point outlet are all located on the high-voltage side of the oil tank 1.

[0021] Further, a core is arranged in the oil tank 1, the core comprises a core main column 2 and a core side column 3, the core side column 3 is located on one side of the core main column 2, the series coil 4 and the common coil 5 are arranged on the core main column 2, and the voltage regulating coil 6 is arranged on the core side column 3.

[0022] Further, a medium-voltage sleeve 10 is arranged between the core main column 2 and the core side column 3, the medium-voltage sleeve 10 is located on the high-voltage side of the oil tank 1, and the medium-voltage winding outlet 9 is connected to the medium-voltage sleeve 10.

[0023] Further, a switch 13 is arranged on the high-voltage side of the oil tank 1, the switch 13 is located on the outside of the medium-voltage sleeve 10, and a voltage regulating lead connecting line 11 is connected to a voltage regulating coil outlet 12 through the switch 13.

[0024] Further, the voltage regulating lead connecting line 11 is connected between the core main column 2 and the switch 13, and the voltage regulating lead connecting line 11 is wound around the side of the medium-voltage sleeve 10 away from the core side column 3.

[0025] Further, a neutral point sleeve 15 is arranged on the low-voltage side of the oil tank 1, and a neutral point lead 14 is connected between the switch 13 and the neutral point sleeve 15.

[0026] Further, the output end of the high-voltage winding outgoing line 7 is provided with a high-voltage bushing 8, and the high-voltage bushing 8 is located at the high-voltage side of the oil tank 1.

[0027] In the embodiment, the implementation scene is specifically as follows: the high-voltage winding of the transformer is composed of the series coil 4, the common coil 5 and the voltage regulating coil 6, the medium-voltage winding is composed of the common coil 5 and the voltage regulating coil 6, the end of the high-voltage winding and the end of the medium-voltage winding are both neutral points, the oil tank 1 is a common rectangular oil tank, the core is a single-phase double-frame core composed of the core main column 2, the core side column 3 and the side yoke, the series coil 4 and the common coil 5 are arranged on the core main column 2, and the voltage regulating coil 6 is arranged at the core side column 3, so that the medium-voltage outgoing line, the high-voltage outgoing line and the neutral point outgoing line are all at the high-voltage side, the medium-voltage bushing 10 is arranged between the high-voltage side core main column 2 and the core side column 3, the switch 13 is arranged on the same side of the medium-voltage bushing 10, the neutral point bushing 15 is arranged at the low-voltage side, the high-voltage winding outgoing line 7 is connected into the high-voltage bushing 8 nearby, the medium-voltage winding outgoing line 9 is connected into the medium-voltage bushing 10 nearby, the voltage regulating lead connecting line 11 is connected to the switch 13 from the lower space of the high-voltage winding and the medium-voltage winding, the voltage regulating coil outgoing line 12 is connected to the switch 13 nearby, the voltage regulating lead connecting line 11 and the voltage regulating coil outgoing line 12 are connected through the switch 13, then the neutral point lead 14 is connected to the neutral point bushing 15 from the switch 13 at the high-voltage side, the high-voltage winding outgoing line 7, the medium-voltage winding outgoing line 9 and the neutral point outgoing line are all at the high-voltage side, so that the winding does not have a half-turn problem, the voltage deviation rate is correspondingly reduced, the high-voltage winding outgoing line 7 and the medium-voltage winding outgoing line 9 are connected into the high-voltage bushing 8 and the medium-voltage bushing 10 nearby respectively, and the neutral point lead 14 is connected into the neutral point bushing 15 from the switch 13, so that the lead arrangement is simple, the outgoing line leads are prevented from crossing, the voltage regulating coil 6 is arranged on the core side column 3, there are fewer coils on the core main column 2, the electrical calculation short-circuit impedance is easier, and the interference term is reduced.

[0028] The above-described embodiments only express several implementation manners of the present application, the description is relatively specific and detailed, but it cannot be understood as a limitation on the patent scope of the present application. It should be noted that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. An arrangement of a single-phase autotransformer voltage regulating transformer, characterized in that, The single-phase self-coupling variable magnetic flux transformer comprises an oil tank (1), high-voltage side and low-voltage side are arranged on two sides of the oil tank (1) respectively, a high-voltage winding and a medium-voltage winding are arranged in the oil tank (1), the high-voltage winding is composed of a series coil (4), a common coil (5) and a voltage regulating coil (6), the medium-voltage winding is composed of the common coil (5) and the voltage regulating coil (6), the end of the high-voltage winding and the end of the medium-voltage winding are provided with a neutral point, the output end of the high-voltage winding is connected with a high-voltage winding outgoing line (7), the output end of the medium-voltage winding is connected with a medium-voltage winding outgoing line (9), the output end of the neutral point is connected with a neutral point outgoing line, and the high-voltage winding outgoing line (7), the medium-voltage winding outgoing line (9) and the neutral point outgoing line are located on the high-voltage side of the oil tank (1).

2. An arrangement of a single phase autotransformer variable magnetic flux voltage regulating transformer according to claim 1, characterized in that: The oil tank (1) is internally provided with an iron core, the iron core comprises an iron core main column (2) and an iron core side column (3), the iron core side column (3) is located on one side of the iron core main column (2), the series coil (4) and the common coil (5) are arranged on the iron core main column (2), and the voltage regulating coil (6) is arranged on the iron core side column (3).

3. An arrangement of a single phase autotransformer variable magnetic flux voltage regulating transformer according to claim 2, characterized in that: The iron core main column (2) and the iron core side column (3) are provided with a medium-voltage sleeve (10), the medium-voltage sleeve (10) is located on the high-voltage side of the oil tank (1), and the medium-voltage winding outgoing line (9) is connected with the medium-voltage sleeve (10).

4. An arrangement of a single phase autotransformer variable magnetic flux voltage regulating transformer according to claim 3, characterized in that: The high-voltage side of the oil tank (1) is further provided with a switch (13), the iron core main column (2) and the switch (13) are connected with a voltage regulating lead connecting line (11), the voltage regulating lead connecting line (11) is wound away from one side of the medium-voltage sleeve (10) away from the iron core side column (3), the switch (13) is located outside the medium-voltage sleeve (10), and the voltage regulating lead connecting line (11) is connected with a voltage regulating coil outgoing line (12) through the switch (13).

5. An arrangement of a single phase autotransformer variable magnetic flux voltage regulating transformer according to claim 4, characterized in that: The low-voltage side of the oil tank (1) is provided with a neutral point sleeve (15), and the switch (13) and the neutral point sleeve (15) are connected with a neutral point lead (14).

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