A wiring method for voltage regulating tapping of double-column parallel transformer

Abstract

The present invention relates to a method for wiring a voltage-regulating tapping line of a double-column parallel transformer, and belongs to the technical field of transformers. The technical solution of the present invention is: in a single-phase double-column parallel transformer, the voltage-regulating coils on the two poles have the same winding direction, the tapping line of the same-name end of the voltage-regulating coil on one pole is on the top, and the tapping line of the same-name end of the voltage-regulating coil on the other pole is on the bottom; when wiring, the tapping line of the voltage-regulating coil on one pole is connected end to end with the tapping line adjacent to the voltage-regulating coil on the other pole, and then connected to the corresponding switch contact through a lead wire. The beneficial effects of the present invention are: the winding direction of the voltage-regulating coils on the two poles is the same, which reduces the labor cost; the lead wires are reduced by nearly half, saving the cost of the lead wires, and at the same time increasing the operating space of the switch wiring, which is convenient for the operator to connect the wires; the current does not pass through the low-gear contact and its lead wire, which reduces the loss in the lead wire during the working state; the length of the current flowing through the wire is reduced, and the resistance unbalance rate is reduced.

Description

Technical Field

[0001] The invention relates to a voltage regulating tapping connection method for a double-column parallel transformer, belonging to the technical field of transformers. Background Art

[0002] At present, high voltage transformers, especially transformers with voltage levels of 750kV and above, often adopt a single-phase double-column structure due to the influence of height. In a single-phase double-column power transformer, the winding directions of the two-column voltage regulating coils are usually opposite, and the same-name ends are on the same side. The upper part of the voltage regulating coils of the two columns are connected to the switch contacts through leads and then connected together at the switch. The lower part is connected in the same way (such as Figure 1 ). This connection method requires that the taps of the same number be connected to the same contact of the switch by wires. A large number of wires are used, usually 4 wires with double input and double output, which can easily lead to tight wiring space at the switch and waste of materials. When the switch contact points to the high-speed contact, the current also flows through the low-speed contact and the corresponding lead. For example, when the switch contact points to 7, all the current in the lead must flow through contacts 3-6. The current flows through a longer route, which will produce additional losses. Summary of the invention

[0003] The object of the present invention is to provide a method for connecting voltage-regulating tapping wires of a double-column parallel transformer, so that the winding directions of the voltage-regulating coils of the two columns are the same, thereby reducing the labor cost; by arranging the tapping wires of the same-name ends of the two voltage-regulating coils up and down in opposite directions, the tapping wire of one column is connected end to end with the tapping wire adjacent to the other column during wiring, and then connected to the switch contact through the lead wire, thereby reducing the lead wire by nearly half, saving the cost of the lead wire, and at the same time increasing the operating space for the switch wiring, making it easier for the operator to connect the wires; the current does not pass through the low-speed contact and its lead wire, thereby reducing the loss in the lead wire during the working state; the length of the current flowing through the wire is reduced, the resistance unbalance rate is reduced, and the above-mentioned problems existing in the background technology are effectively solved.

[0004] The technical solution of the present invention is: a wiring method for voltage-regulating tapping wires of a double-pole parallel transformer, in which the voltage-regulating coils on the two poles have the same winding direction, the tapping wires of the same-name end of the voltage-regulating coil on one pole are on the top, and the tapping wires of the same-name end of the voltage-regulating coil on the other pole are on the bottom. When wiring, the tapping wires of the voltage-regulating coil on one pole are connected end to end with the tapping wires adjacent to the voltage-regulating coil on the other pole, and then connected to the corresponding switch contacts through leads.

[0005] The tap wires arranged at the upper end of one pole-mounted voltage-regulating coil are tap wire No. 3, tap wire No. 4, tap wire No. 5 and tap wire No. 6, and the tap wires arranged at the lower end are tap wire No. 3', tap wire No. 4', tap wire No. 5' and tap wire No. 6'; the tap wires arranged at the upper end of another pole-mounted voltage-regulating coil are tap wire No. 3', tap wire No. 4', tap wire No. 5' and tap wire No. 6', and the tap wires arranged at the lower end are tap wire No. 3, tap wire No. 4, tap wire No. 5 and tap wire No. 6.

[0006] There are six switch contacts, which match the tapping wires, namely switch contact two, switch contact three, switch contact four, switch contact five, switch contact six and switch contact seven.

[0007] The beneficial effects of the present invention are as follows: the winding directions of the voltage regulating coils of the two columns are the same, which reduces the labor cost; the tapping wires of the same-name ends of the two voltage regulating coils are arranged in opposite directions up and down, and the tapping wire of one column is connected end to end with the tapping wire adjacent to the other column during wiring, and then connected to the switch contact through the lead wire, which reduces nearly half of the lead wires, saves the cost of the lead wires, and at the same time increases the operating space for switch wiring, making it easier for the operator to wire; the current does not pass through the low-speed contact and its lead wire, which reduces the loss in the lead wire during the working state; the length of the current flowing through the wire is reduced, and the resistance imbalance rate is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is the background technology diagram of the present invention;

[0009] Figure 2 It is a wiring diagram of the present invention;

[0010] In the figure: switch contact two 12, switch contact three 13, switch contact four 14, switch contact five 15, switch contact six 16, switch contact seven 17. Specific implementation methods

[0011] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0012] A method for wiring voltage-regulating tapping wires of a double-pole parallel transformer. In a single-phase double-pole parallel transformer, the voltage-regulating coils on the two poles have the same winding direction, the tapping wires of the same-name end of the voltage-regulating coil on one pole are on the top, and the tapping wires of the same-name end of the voltage-regulating coil on the other pole are on the bottom. When wiring, the tapping wire of the voltage-regulating coil on one pole is connected end to end with the tapping wires adjacent to the voltage-regulating coil on the other pole, and then connected to corresponding switch contacts through leads.

[0013] The tap wires arranged at the upper end of one pole-mounted voltage-regulating coil are tap wire No. 3, tap wire No. 4, tap wire No. 5 and tap wire No. 6, and the tap wires arranged at the lower end are tap wire No. 3', tap wire No. 4', tap wire No. 5' and tap wire No. 6'; the tap wires arranged at the upper end of another pole-mounted voltage-regulating coil are tap wire No. 3', tap wire No. 4', tap wire No. 5' and tap wire No. 6', and the tap wires arranged at the lower end are tap wire No. 3, tap wire No. 4, tap wire No. 5 and tap wire No. 6.

[0014] There are six switch contacts, which match the tapping wires, namely switch contact two 12 , switch contact three 13 , switch contact four 14 , switch contact five 15 , switch contact six 16 and switch contact seven 17 .

[0015] In practical applications, the voltage regulating coils on the two poles are wound in the same direction, with the same-name end of one pole at the top and the same-name end of the other pole at the bottom (such as Figure 2 ). When wiring, connect the tap of one column with the tap adjacent to the other column end to end, and then connect to the switch contact through the lead wire, that is, connect the 3' tap wire and the 4' tap wire together and then connect to the switch contact four, connect the 4' tap wire and the 5' tap wire together and then connect to the switch contact five, and so on. When the switch contact points to 7, the current starts from the switch contact seven and flows to the coil's 6 tap wire through the lead wire. Since the 6' tap wire and the 5' tap wire are connected together, the current flows from the 5' tap wire through the coil to the 5' tap wire through the two-column coil connection line, and then the 5' tap wire and the 4' tap wire are connected together, and so on, the current flows all the way to the high-voltage head A. The current mainly flows through the lead wires from the switch contact seven to the 6' tap wire contact point, the connection wires between the coils, and the coils. The low-speed contacts and their leads do not flow or a small amount of circulating current flows.

[0016] The advantage of this connection method is that the voltage regulating coils of the two columns are exactly the same, which saves the time of designing coils with different winding directions and reduces labor costs. Only two leads need to be connected to each switch contact, which reduces the lead wires by nearly half, saves the cost of the lead wires, and increases the operating space of the switch wiring, making it easier for the operator to connect the wires. The current does not pass through the low-speed contact and its lead wires, reducing the loss in the lead wires during the working state. The length of the current flowing through the wire is reduced, and the resistance unbalance rate is reduced.

Claims

1. A method for connecting a voltage-regulating tapping line of a double-column parallel transformer, characterized in that: In a single-phase two-pole parallel transformer, the voltage regulating coils on the two poles are wound in the same direction, the tapping wires of the same-name end of the voltage regulating coil on one pole are on the top, and the tapping wires of the same-name end of the voltage regulating coil on the other pole are on the bottom; when wiring, the tapping wires of the voltage regulating coil on one pole are connected end to end with the adjacent tapping wires of the voltage regulating coil on the other pole, and then connected to the corresponding switch contacts through leads; The tap wires arranged at the upper end of the one pole-mounted voltage-regulating coil are tap wire No. 3, tap wire No. 4, tap wire No. 5 and tap wire No. 6, and the tap wires arranged at the lower end are tap wire No. 3', tap wire No. 4', tap wire No. 5' and tap wire No. 6'; the tap wires arranged at the upper end of the other pole-mounted voltage-regulating coil are tap wire No. 3', tap wire No. 4', tap wire No. 5' and tap wire No. 6', and the tap wires arranged at the lower end are tap wire No. 3, tap wire No. 4, tap wire No. 5 and tap wire No. 6; There are six switch contacts, which match the tapping wires, namely switch contact two (12), switch contact three (13), switch contact four (14), switch contact five (15), switch contact six (16) and switch contact seven (17).

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