CN217157910U - Voltage-regulating tapping system of arcless on-load automatic voltage-regulating distribution transformer - Google Patents

Abstract

The utility model provides a pair of there is not arc to carry automatic voltage regulation distribution transformer voltage regulation shunting system, the system includes: the voltage regulating winding, the voltage regulating switch array and the voltage regulating transition branch circuit are arranged on the transformer; each voltage regulating winding is connected with 2 two-way switches in the voltage regulating switch array, the voltage regulating transition branch comprises a parallel electronic switch and a series electronic switch, two ends of each electronic switch are connected with a conventional switch in parallel, and the voltage regulating winding, the voltage regulating switch array and the voltage regulating transition branch are combined to realize the switching-in or the quitting through different accesses. The utility model provides a technical scheme, through the transition function of pressure regulating switch array and pressure regulating transition branch road, eliminated the production of pressure regulating in-process electric arc on the one hand, improved the speed and the efficiency of pressure regulating, on the other hand, the conventional switch that the back electronic switch function has its both ends to connect and take over after the pressure regulating is ended has improved the reliability, has reduced the loss, has realized that the at utmost is energy-conserving.

Description

An arc-free on-load automatic voltage regulation and distribution transformer voltage regulation and tap system

technical field

The utility model relates to the technical field of voltage regulation of distribution transformers, in particular to an arc-free on-load automatic voltage regulation and distribution transformer voltage regulation and tap system.

Background technique

In the power system, when the grid voltage or load changes, the output voltage of the transformer will change. When the change exceeds the allowable range, it will affect the production and life of power users. In order to ensure that the output voltage of the transformer is within the allowable range, automatic voltage regulation technology is used, that is, when the output voltage exceeds the allowable value, the number of turns of the primary and secondary windings of the distribution transformer is adjusted by selecting different winding taps, thereby changing the distribution transformer. The transformation ratio of the electric transformer ensures that the voltage at the load end is maintained within a reasonable range.

At present, there are two problems in the automatic voltage regulation technology of distribution transformers: First, the on-load tap-changer is usually used. Most of the existing on-load tap-changers are mechanical switches. There is arc generation, mechanical contacts are easily damaged by wear and tear, and it is easy to cause the quality of transformer oil to deteriorate. It is necessary to frequently check oil, which limits the application scope of this switch; very few use power electronic equipment voltage regulating transformers, and the voltage regulating topology is complex , There are many auxiliary equipment, and the electronic switch is also connected in series in the circuit in the working state, resulting in an increase in energy consumption and a decrease in reliability. Second, the adjustment accuracy of the conventional distribution transformer with winding tap adjustment is not high, about 2.5% of the rated voltage. In the case of positive and negative three-level winding taps, the adjustment range of the distribution transformer is about its rated voltage - 7.5% to 7.5%. However, in the actual power system, there is often a huge difference between day and night peaks and valleys of industrial loads, resulting in large fluctuations in the voltage at the load terminals, which often exceed the voltage range that can be adjusted by conventional distribution transformer winding tap adjustment methods.

SUMMARY OF THE INVENTION

The utility model provides an arc-free on-load automatic voltage regulation and distribution transformer voltage regulation and tap system, comprising: a voltage regulation winding, a voltage regulation switch array and a voltage regulation transition branch;

Each voltage regulating winding is connected to 2 dual switches in the voltage regulating switch array,

The voltage regulation transition branch includes a parallel electronic switch and a series electronic switch, and both ends of each electronic switch are connected in parallel with a conventional switch;

The voltage regulating winding is connected in parallel with one electronic switch of the voltage regulating transition branch, and is connected in series with another electronic switch;

Preferably, each voltage regulating winding is connected to two dual switches in the voltage regulating switch array, including:

One end of the voltage regulating winding is connected to the first two-way switch and the second two-way switch respectively, and the other end of the voltage regulating winding is respectively connected to the first two-way switch and the second two-way switch.

Preferably, both ends of each electronic switch of the voltage regulation transition branch are connected in parallel with a conventional switch.

Preferably, each electronic switch is connected in parallel with a filter capacitor.

Preferably, the voltage regulating and tapping system further includes:

The voltage regulating control module is used to control the switching of various switches in the voltage regulating transition branch and the voltage regulating switch array.

Preferably, the voltage regulation control module includes:

a power taking unit, used to provide power for the voltage regulation control module;

The measuring unit is used to measure the output voltage of the low-voltage side of the transformer;

an arithmetic control unit, used for calculating the number of winding turns to be adjusted on the high-voltage side according to the difference between the output voltage of the low-voltage side of the transformer and the rated voltage, and generating the voltage-regulating logic of the expected voltage-regulating winding;

The trigger output unit is used to output control signals to the voltage regulation switch array and the voltage regulation transition branch according to the voltage regulation logic in time sequence, to control the switching of the two-way switch in the voltage regulation switch array and the electronic components in the voltage regulation transition branch The switch and the conventional switch are switched on and off, so that the voltage regulating winding can be connected to the high-voltage side in series in the forward, reverse or disconnected manner;

Both the power taking unit and the measuring unit are connected with the arithmetic control unit;

the operation control unit is connected with the trigger output unit;

The trigger output unit sends control signals to the switches of the voltage regulating switch array and the voltage regulating transition branch.

Preferably, the power taking unit and the measuring unit share the same winding.

Preferably, the number of dual switches in the voltage regulating switch array is twice the number of voltage regulating windings.

Preferably, the number of the voltage regulating windings is 2 or 3.

The utility model also provides a method for controlling the voltage regulating and tapping system of an arc-free on-load automatic voltage regulation and distribution transformer, comprising:

Control the switching state of the two-way switch in the voltage regulating switch array;

Control the access state of the voltage regulating winding according to the switching of the two-way switch;

The switching of two electronic switches in the voltage regulating transition branch at the time of voltage or current zero crossing realizes the input and withdrawal of the voltage regulating winding, so as to eliminate the generation of arc in the voltage regulating transition process.

Preferably, the conventional switch passing through the voltage regulation transition branch is used to take over the conduction function of the parallel-connected electronic switch in a normal operation state, so as to eliminate the operation loss of the electronic switch.

Preferably, the connection state of the voltage regulating winding includes: forward connection, reverse connection and disconnection.

Preferably, the control of the switching states of the two-way switches in the voltage regulating switch array includes:

According to the control signal issued by the voltage regulating control module, the switching of the paths of the two-way switches in the voltage regulating switch array is adjusted.

Compared with the closest prior art, the technical scheme provided by the present utility model has the following beneficial effects:

In the technical solution provided by the utility model, the voltage regulating tap system includes a voltage regulating winding, a voltage regulating switch array and a voltage regulating transition branch, and each voltage regulating winding is connected to two dual switches in the voltage regulating switch array , the voltage regulating transition branch includes two electronic switches, the voltage regulating winding is connected in parallel with one electronic switch and the other electronic switch is connected in series. Through the transition function of the voltage regulation switch array and the voltage regulation transition branch, on the one hand, the generation of arcs during the voltage regulation process is eliminated, and the speed and efficiency of the voltage regulation are improved. On the other hand, no electronic switch is connected after the voltage regulation is completed. , improve reliability, reduce losses, and achieve maximum energy saving.

Description of drawings

Fig. 1 is a kind of non-arc on-load automatic voltage regulation and distribution transformer voltage regulation tap system schematic diagram provided by the utility model;

2 is a schematic diagram of an access system for an arc-free on-load automatic voltage regulation and distribution transformer voltage regulation tap system provided by an embodiment of the present utility model;

FIG. 3 is a circuit topology diagram of a voltage regulation and tap system of an arc-free on-load automatic voltage regulation and distribution transformer provided by an embodiment of the present utility model;

4 is a schematic structural diagram of a voltage regulation control module provided by an embodiment of the present invention;

5 is a schematic diagram of an electronic switch in a voltage regulating transition branch provided by Embodiment 6 of the present utility model;

6 is a schematic diagram of an electronic switch in a voltage regulation transition branch provided in Embodiment 7 of the present utility model;

7 is a schematic diagram of an electronic switch in a voltage regulation transition branch provided by Embodiment 8 of the present invention;

FIG. 8 is a schematic diagram of an electronic switch in a voltage regulation transition branch provided by Embodiment 9 of the present invention.

Detailed ways

The technical scheme of the present utility model will be described in detail below in conjunction with the accompanying drawings and examples:

Example 1

Fig. 1 is a schematic diagram of a voltage regulating and tapping system of an arc-free on-load automatic voltage regulation and distribution transformer provided by the utility model, as shown in Fig. 1, an arc-free on-load automatic voltage regulation and distribution transformer provided by the utility model Voltage regulating tap system, including: voltage regulating winding, voltage regulating switch array and voltage regulating transition branch;

Each voltage regulating winding is connected to 2 dual switches in the voltage regulating switch array,

The voltage regulation transition branch includes a parallel electronic switch and a series electronic switch, and both ends of each electronic switch are connected in parallel with a conventional switch;

The voltage regulating winding is connected in parallel with one electronic switch of the voltage regulating transition branch, and is connected in series with another electronic switch;

Each voltage regulating winding is connected to 2 dual switches in the voltage regulating switch array, including:

One end of the voltage regulating winding is connected to the first two-way switch and the second two-way switch respectively, and the other end of the voltage regulating winding is respectively connected to the first two-way switch and the second two-way switch.

The electronic switch of the voltage regulation transition branch is used for switching at the moment of voltage or current zero crossing to realize the rapid input and withdrawal of the voltage regulation winding, so as to eliminate the generation of arcs in the voltage regulation transition process;

Each electronic switch can also be connected in parallel with a filter capacitor to eliminate voltage spikes during voltage regulation transitions.

The pressure regulating and tapping system further includes a pressure regulating control module;

The voltage regulation control module controls the switching of the two-way switches in the voltage regulation switch array.

The voltage regulation control module includes:

a power taking unit, used to provide power for the voltage regulation control module;

The measuring unit is used to measure the output voltage of the low-voltage side of the transformer;

an arithmetic control unit, configured to generate a voltage regulation logic of the voltage regulation winding according to the output voltage of the low voltage side of the transformer;

a trigger output unit, used for outputting a control signal according to the voltage regulating logic, to control the switching of the two-way switch in the voltage regulating switch array and the on-off of the electronic switch and the conventional switch in the voltage regulating transition branch;

Both the power taking unit and the measuring unit are connected with the arithmetic control unit;

the operation control unit is connected with the trigger output unit;

The trigger output unit sends a control signal to the voltage regulating switch array.

The power taking unit and the measuring unit share the same winding.

The number of dual switches in the voltage regulating switch array is twice the number of voltage regulating windings.

Embodiment 2

Based on the same inventive concept, the present utility model also proposes a control method applied to the above-mentioned non-arc on-load automatic voltage regulating distribution transformer voltage regulating and tapping system, including the following steps:

Control the switching state of the two-way switch in the voltage regulating switch array;

Control the access state of the voltage regulating winding according to the switching of the two-way switch;

The switching of the electronic switch in the voltage regulating transition branch at the zero-crossing time of the voltage or current (different according to different electronic switch types) realizes the input and withdrawal of the voltage regulating winding, so as to eliminate the generation of arcs in the voltage regulating transition process.

In the embodiment of the present invention, the conventional switch of the voltage regulating transition branch can be used to replace the conduction function of the parallel electronic switch in the normal operation state, so as to realize the elimination of the operation loss of the electronic switch.

In the embodiment of the present utility model, the access state of the voltage regulating winding includes: forward access, reverse access and disconnection;

In the embodiment of the present utility model, controlling the switching state of the two-way switch in the voltage regulating switch array includes:

The voltage regulating switch array adjusts the on-off of the two-way switch according to the control signal issued by the voltage regulating control module, so as to realize the switching of the channel where the two-way switch in the voltage regulating switch matrix is located.

Embodiment 3

FIG. 2 is a schematic diagram of an access system for an arc-free on-load automatic voltage regulation and distribution transformer voltage regulation and tap connection system provided by an embodiment of the present utility model. As shown in FIG. 2, the distribution transformer includes a high-voltage winding, a low-voltage winding and a voltage regulator connection system;

The voltage regulating tap system includes N voltage regulating windings, a voltage regulating switch array, a voltage regulating transition branch and a voltage regulating control module, wherein N is a positive integer, generally 2 or 3;

The voltage regulation control module includes power taking and measurement windings;

As shown in FIG. 3 , the voltage regulating switch array includes 2N dual switches, and every 2 dual switches corresponds to one of the voltage regulating windings; the voltage regulating transition branch includes a parallel electronic switch And a series electronic switch, each electronic switch is connected in parallel with a conventional switch and a filter capacitor.

The connection method of the voltage regulating winding 1 and the voltage regulating winding 2 in the example of the present utility model is as follows:

The voltage regulating winding 1 is connected to K1 and K2 in the voltage regulating switch array. When the A1 end of K1 is connected to the C1 end, and the B2 end of K2 is connected to the C2 end, the voltage regulating winding 1 is connected in the forward direction. When the B1 end of K1 is connected with the C1 end, and the A2 end of K2 is connected with the C2 end, the voltage regulating winding 1 is connected in reverse; when the A1 end of K1 is connected with the C1 end and the A2 end of K2 is connected with the C2 end When the terminals are connected or the B1 terminal of K1 is connected to the C1 terminal and the B2 terminal of K2 is connected to the C2 terminal, the voltage regulating winding 1 is not connected (ie disconnected);

The voltage regulating winding 2 is connected with K3 and K4 in the voltage regulating switch array. When the A3 end of K3 is connected with the C3 end, and the B4 end of K4 is connected with the C4 end, the voltage regulating winding 2 is connected in the forward direction. When the B3 terminal of K3 is connected to the C3 terminal, and the A4 terminal of K4 is connected to the C4 terminal, the voltage regulating winding 2 is connected in reverse; when the A3 terminal of K3 is connected to the C3 terminal and the A4 terminal of K4 is connected to the C4 terminal When the terminals are connected or the B3 terminal of K3 is connected to the C3 terminal, and the B4 terminal of K4 is connected to the C4 terminal, the voltage regulating winding 2 is not connected (ie, disconnected).

Embodiment 4

Taking the circuit topology structure of the voltage regulation and tap system of the arc-free on-load automatic voltage regulation distribution transformer shown in Figure 3 as an example to illustrate the voltage regulation process of the transformer:

1) Switch the voltage regulating winding from the non-voltage regulating mode to the voltage regulating mode: determine the connection state of the voltage regulating winding according to the sampling voltage of the measurement winding, and operate the switches K1-K4 in the voltage regulating switch array, so that the voltage regulating winding is in a suitable way Enter the pre-connection state; then turn on the electronic switch G2, turn off the switch K6, and supply power through the electronic switch G2. After phase locking, the electronic switch G2 is turned off before the voltage zero-crossing point, and the electronic switch G1 is switched on with zero delay at the zero-crossing point. After switching, K5 is closed, and then the electronic switch G1 is turned off. The voltage regulating winding is connected in series to the main circuit according to the preset method. , the winding voltage regulation is completed. 2) The voltage regulating winding is switched from the voltage regulating mode to the non-voltage regulating mode: turn on the electronic switch G1 first, turn off K5, turn off the electronic switch G1 before the zero-crossing point, turn on the electronic switch G2 at the zero-crossing point, close K6, and then turn off the electronic switch. Switch G1, K1-K4 return to the initial state, and the voltage regulation mode exits the voltage regulation mode to complete.

The connection state of the voltage regulating winding includes forward connection, reverse connection and disconnection. Taking the voltage regulating winding 1 as an example, in case 1, when the A1 terminal and the C1 terminal of the K1 switch in the switch array are turned on, and the B2 terminal and the C2 terminal of the K2 switch are turned on, the voltage regulating winding 1 is connected to the high-voltage winding in series in the forward direction. , the number of turns of the equivalent winding on the high-voltage side of the distribution transformer increases. In case 2, when the B1 and C1 terminals of the K1 switch in the switch array are connected, and the A2 and C2 terminals of the K2 switch are connected, the voltage regulating winding 1 is connected to the high-voltage winding in reverse series, and the high-voltage side of the distribution transformer is equivalent to The number of winding turns is reduced. Case 3, when the A1 terminal and C1 terminal of the K1 switch in the switch array are connected, and the A2 terminal and C2 terminal of the K2 switch are connected, the B1 terminal and C1 terminal of the K1 switch are connected, and the B2 terminal and the C2 terminal of the K2 switch are connected. When conducting, the voltage regulating winding 1 is disconnected, and the number of turns of the equivalent winding on the high-voltage side of the distribution transformer remains unchanged. Through the coordination of on-off of each switch in the switch array, the voltage regulating winding corresponding to the switch array can be introduced into the high-voltage winding in a forward, reverse or disconnected manner, so as to increase, reduce or maintain the equivalent winding of the original high-voltage winding. The purpose of the number of turns. Through the combined use of multiple voltage regulating windings, the number of regulation stages that are several times the order of magnitude of the voltage regulating windings can be realized, which greatly increases the voltage regulation range and accuracy of the distribution transformer, and keeps the voltage fluctuation at the load terminal within a reasonable range.

As a specific implementation, as shown in FIG. 3 , the switch in the voltage regulating switch array is a two-way switch, which should have three terminals, and the function of the switch is to connect one of its terminals with the other two terminals. One conduction state is transformed into conduction with another terminal, and there is no simultaneous conduction situation, such as switch K1, which can only be conduction between A1-C1 or B1-C1, or between two. transitions between them, and no other state. The two-way switch can be a magnetic latching relay in specific implementation.

In the embodiment of the present invention, on the one hand, as described in the third embodiment, the on-off state of each switch of the voltage regulating switch array can be controlled, so that the series of the corresponding connected two voltage regulating winding vectors can be connected to the high voltage winding. , so as to change the equivalent number of turns of the high-voltage winding; on the other hand, as described in the fourth embodiment, the on-off state of each electronic switch and conventional switch of the voltage regulation transition branch can be controlled to eliminate the arc in the voltage regulation transition process. produce.

Embodiment 5

As a specific implementation manner, FIG. 4 is a schematic structural diagram of a voltage regulation control module. The control module mainly includes a power acquisition unit, a measurement unit, an arithmetic control unit, and a trigger output unit. The power taking unit is a coil with a separate winding, as shown in Figure 2, which provides power for the entire control module. At the same time, the winding is also used for measurement, that is, the power taking coil and the measuring coil are shared to measure the output voltage of the low-voltage side of the transformer, It provides a reference for the voltage regulation of the voltage regulating transformer, usually taking the rated voltage of the low-voltage side as the adjustment target. The arithmetic control unit calculates the number of winding turns that should be adjusted on the high-voltage side according to the difference between the current low-voltage side voltage and the rated voltage provided by the measurement unit, and generates an expected voltage regulation winding state matrix and voltage regulation logic. The trigger output unit, according to the voltage regulation logic generated by the arithmetic control unit, outputs the corresponding control signal according to the time sequence, turns on or off the relevant switches, and realizes that the voltage regulation winding is in a forward, reverse or short circuit manner according to the voltage regulation logic. It is connected in series to the high-voltage side to achieve the purpose of voltage regulation.

Embodiment 6

As a specific implementation of the electronic switch G1 in the voltage regulation transition branch, as shown in FIG. 5 , the electronic switch unit includes two anti-parallel thyristors SCR1, thyristors SCR2 and a varistor R1, and the anode of the thyristor SCR1 They are respectively connected with the cathode of the thyristor SCR2 and one end of the varistor R1, the anode of the thyristor SCR2 is respectively connected with the cathode of the thyristor SCR1 and the other end of the varistor R1, and the two public connection terminals P and Q are respectively used as the electronic switch unit. External connection. Since the above two thyristors can be turned on or off respectively under the action of the control signal, the bidirectional on-off function of the electronic switch unit under different conditions can be realized. In the switch unit, the varistor R1 connected in parallel with the two thyristors is used to limit the voltage across the thyristors and protect the thyristors.

Embodiment 7

As a specific implementation of the electronic switch G1 in the voltage regulation transition branch, as shown in FIG. 6 , the electronic switch unit includes two insulated gate bipolar transistors (IGBT) T1 and T2 and two diodes D1 and D2. The emitter of the insulated gate bipolar transistor T1 is respectively connected to the emitter of the insulated gate bipolar transistor T2, the anode of the diode D1 and the anode of the diode D2, and the collector of the insulated gate bipolar transistor T1 and the cathode of the diode D2 are respectively connected. Connected to the external common connection terminal P, the collector of the insulated gate bipolar transistor T2 and the cathode of the diode D1 are connected to the external common connection terminal Q, respectively.

Embodiment 8

As a specific implementation of the electronic switch G1 in the voltage regulation transition branch, as shown in FIG. 7 , the electronic switch unit includes two insulated gate bipolar transistors (IGBT) T3 and T4 and two diodes D3 and D4. The collector of the insulated gate bipolar transistor T3 is respectively connected to the collector of the insulated gate bipolar transistor T4, the anode of the diode D1 and the anode of the diode D2, and the emitter of the insulated gate bipolar transistor T3 and the cathode of the diode D4 are respectively connected. Connected to the external common connection terminal P, the emitter of the insulated gate bipolar transistor T4 and the cathode of the diode D3 are connected to the external common connection terminal Q, respectively.

Embodiment 9

As a specific implementation of the electronic switch G1 in the voltage regulation transition branch, as shown in FIG. 8 , the electronic switch unit includes two insulated gate bipolar transistors (IGBT) T5 and four diodes D5, D6, D7, D8, the collector of the insulated gate bipolar transistor T5 is connected to the cathode of the diode D5 and the cathode of the diode D6 respectively, the emitter of the insulated gate bipolar transistor T5 is connected to the anode of the diode D7 and the anode of the diode D8 respectively, and the external common The connection terminal P is connected to the cathode of the diode D7 and the anode of the diode D5 respectively, and the external common connection terminal Q is connected to the cathode of the diode D8 and the anode of the diode D6 respectively.

As a specific embodiment, the high and low voltage windings and the voltage regulating winding shown in FIG. 3 are only a schematic connection diagram of voltage regulation of one phase in the three-phase winding of a distribution transformer in practical applications, and the connection methods and diagrams of the other two phases are 3 is the same.

The utility model provides a method for adjusting the output voltage of the transformer by controlling the access state of the voltage regulating winding of the transformer through the voltage regulating tap changer. The method provides the transition of the transition branch when the voltage regulating winding changes the access state. A method and a method of operation of a voltage regulating switch array. From this example, we can see that through the adjustment of the voltage regulating tap-changer, the voltage regulating winding can be connected to the high-voltage winding in a vector, smooth and arc-free series, thus providing a wide range of high-precision on-load voltage regulation of the transformer. method.

As will be appreciated by those skilled in the art, the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than to limit its protection scope. Although the application has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand: After reading this application, those skilled in the art can still make various changes, modifications or equivalent replacements to the specific embodiments of the application, but these changes, modifications or equivalent replacements are all within the protection scope of the pending claims.

Claims (8)

1. an arc-free on-load automatic voltage regulation and distribution transformer voltage regulation tap system, is characterized in that, comprises: voltage regulation winding, voltage regulation switch array and voltage regulation transition branch; Each voltage regulating winding is connected to two dual switches in the voltage regulating switch array; The voltage regulating transition branch includes a parallel electronic switch and a series electronic switch, and two ends of each electronic switch are connected in parallel with a conventional switch; the voltage regulating winding and the voltage regulating switch array and the voltage regulating transition branch pass through different paths. The access combination realizes the entry or exit. 2. The system of claim 1, wherein each voltage regulating winding is connected to two dual switches in the voltage regulating switch array, comprising: One end of the voltage regulating winding is connected to the first two-way switch and the second two-way switch respectively, and the other end of the voltage regulating winding is respectively connected to the first two-way switch and the second two-way switch. 3 . The system according to claim 1 , wherein, in the parallel electronic switch and the series electronic switch of the voltage regulation transition branch, two ends of each electronic switch are connected in parallel with a conventional switch. 4 . 4. The system of claim 3, wherein each electronic switch is connected in parallel with a filter capacitor. 5. The system of claim 1, wherein the voltage regulating tap system further comprises: The voltage regulating control module is used to control the switching of various switches in the voltage regulating transition branch and the voltage regulating switch array. 6. The system of claim 5, wherein the voltage regulation control module comprises: a power taking unit, used to provide power for the voltage regulation control module; The measuring unit is used to measure the output voltage of the low-voltage side of the transformer; an arithmetic control unit, used for calculating the number of winding turns to be adjusted on the high-voltage side according to the difference between the output voltage of the low-voltage side of the transformer and the rated voltage, and generating the voltage-regulating logic of the expected voltage-regulating winding; The trigger output unit is used to output control signals to the voltage regulation switch array and the voltage regulation transition branch according to the voltage regulation logic in time sequence, to control the switching of the two-way switch in the voltage regulation switch array and the electronic components in the voltage regulation transition branch On-off of switches and conventional switches; thus, the voltage regulating winding can be connected to the high-voltage side in series in the forward, reverse or disconnected manner; Both the power taking unit and the measuring unit are connected with the arithmetic control unit; The operation control unit is connected with the trigger output unit. 7. The system of claim 6, wherein the power taking unit and the measuring unit share the same winding. 8 . The system of claim 1 , wherein the number of the voltage regulating windings is 2 or 3. 9 .

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