CN112382484A - Power supply transformer capable of dynamically adjusting capacitance compensation capacity - Google Patents
Power supply transformer capable of dynamically adjusting capacitance compensation capacity Download PDFInfo
- Publication number
- CN112382484A CN112382484A CN202011327348.3A CN202011327348A CN112382484A CN 112382484 A CN112382484 A CN 112382484A CN 202011327348 A CN202011327348 A CN 202011327348A CN 112382484 A CN112382484 A CN 112382484A
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- voltage
- power supply
- supply transformer
- coil
- compensation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/341—Preventing or reducing no-load losses or reactive currents
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/38—Auxiliary core members; Auxiliary coils or windings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/025—Constructional details of transformers or reactors with tapping on coil or windings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The invention discloses a power supply transformer capable of dynamically adjusting capacitance compensation capacity, which comprises a power supply transformer and two on-load voltage-regulating switches, wherein the power supply transformer consists of a high-voltage winding and a low-voltage winding; the high-voltage winding is formed by the self-coupling connection of a basic coil, a voltage regulating coil and a compensation coil. When the power supply transformer capable of dynamically adjusting the capacitance compensation capacity is used for supplying power to the electric equipment, the dynamic reactive power compensation of the electric equipment can be realized on the premise of adopting the fixed capacitance compensation device, so that the running power factor of the electric equipment is improved, the power consumption is saved, the equipment capacity is improved, and the required capacitance compensation device has the advantages of simple structure, low cost and high reliability.
Description
Technical Field
The invention relates to the technical field of electromechanics, in particular to a power supply transformer capable of dynamically adjusting capacitance compensation capacity.
Background
Many large-scale industrial electric equipment has low power factor and large reactive power consumption during operation, so that the electric efficiency is low, the power consumption is high, the unit production cost is high, and the equipment productivity is low. In order to improve the operating power factor of the electric equipment, the reactive power compensation must be carried out through an external capacitance compensation device. The compensation mode mainly comprises the steps of installing a fixed capacitance compensation device at the high-voltage or medium-voltage line end of the power supply transformer, or adopting a special dynamic adjustable capacitance compensation device at the high-voltage, medium-voltage or low-voltage line end of the power supply transformer. However, the compensation capacity of the fixed capacitance compensation device is not adjustable, so that the real-time dynamic compensation can not be realized when the electric equipment runs. Although the special dynamic adjustable capacitance compensation device can perform real-time compensation, the dynamic adjustable capacitance compensation devices have complex structures, high cost and low reliability in frequent switching. Therefore, in actual production, many large-scale industrial electric devices still adopt the fixed capacitance compensation device, and real-time dynamic compensation cannot be achieved.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a power supply transformer capable of dynamically adjusting the capacitance compensation capacity, which utilizes the principle that the output capacity of a compensation capacitor is in direct proportion to the square of the applied voltage, adjusts the applied voltage on a fixed capacitance compensation device in real time by adjusting the output voltage of a compensation coil of the power supply transformer, realizes the dynamic adjustment of the reactive compensation capacity, thereby realizing the dynamic reactive power compensation of the running of electric equipment and solving the problems in the background technology.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the on-load voltage regulation switch comprises a power supply transformer and two on-load voltage regulation switches, wherein the power supply transformer consists of a high-voltage winding and a low-voltage winding, and the high-voltage winding consists of a basic coil, a voltage regulation coil and a compensation coil which are connected in a self-coupling mode.
Optionally, the compensation coil is located at a high-voltage incoming line end of the high-voltage winding.
Optionally, the compensation coil is provided with a tap.
Optionally, the voltage regulating coil is provided with a tap.
(III) advantageous effects
The invention provides a power supply transformer capable of dynamically adjusting capacitance compensation capacity, which has the following beneficial effects:
1. when the power supply transformer capable of dynamically adjusting the capacitance compensation capacity is used for supplying power to the electric equipment, the dynamic reactive power compensation of the electric equipment can be realized on the premise of adopting the fixed capacitance compensation device, so that the running power factor of the electric equipment is improved, the power consumption is saved, the equipment capacity is improved, and the required capacitance compensation device has the advantages of simple structure, low cost and high reliability.
2. When the voltage of the power grid is low, the on-load tap changer of the compensation coil is adjusted to still provide compensation voltage higher than the voltage of the power grid, so that the reactive compensation capacity required by the electric equipment is not reduced due to the reduction of the voltage of the power grid.
Drawings
FIG. 1 is a schematic diagram of the single-phase wiring principle of the high-voltage winding of the power supply transformer of the present invention;
FIG. 2 is a schematic diagram of a radial arrangement of the windings of the power supply transformer of the present invention;
in the figure: 1. a compensation coil; 2. a base coil; 3. a voltage regulating coil; 4. and a low-voltage winding.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1 to 2, the present invention provides a technical solution: a power supply transformer capable of dynamically adjusting capacitance compensation capacity comprises a power supply transformer and two on-load tap changers. The power supply transformer consists of a high-voltage winding and a low-voltage winding 4, and the high-voltage winding of the power supply transformer consists of a basic coil 2, a voltage regulating coil 3 and a compensating coil 1. The compensation coil is positioned at a high-voltage incoming line end of the high-voltage winding, and the basic coil 2, the voltage regulating coil 3 and the compensation coil 1 are combined in a self-coupling connection mode. The high-voltage winding can be star-connected or angle-connected according to the requirement. The compensation coil 1 is provided with a tapping tap, and the output voltage of the compensation coil can be adjusted in real time through a special on-load voltage regulating switch as required when the power equipment runs; the voltage regulating coil 3 is provided with a tapping tap, and the output voltage of the low-voltage winding of the power supply transformer can be regulated in real time through a special on-load voltage regulating switch as required when the power utilization equipment runs.
A high-voltage winding of a power supply transformer capable of dynamically adjusting capacitance compensation capacity is formed by combining a basic coil, a voltage adjusting coil and a compensation coil in a self-coupling connection mode, wherein the compensation coil is positioned at a high-voltage wire inlet end of the high-voltage winding. The highest voltage output by the compensation coil can be the same as or different from the high-voltage incoming line voltage of the power supply transformer, and the voltage regulating coil and the compensation coil are respectively provided with a tapping tap and an on-load voltage regulating switch. When the electric equipment runs, the low-voltage output voltage of the power supply transformer is changed by adjusting the on-load voltage-regulating switch of the voltage-regulating coil, so that the working condition requirement of the electric equipment is met; the real-time adjustment of the reactive compensation capacity is realized by adjusting the on-load voltage regulating switch of the compensation coil and changing the voltage applied to the fixed capacitance compensation device, so that the dynamic reactive compensation of the electric equipment is realized, the running power factor of the electric equipment is improved, the power consumption is saved, and the capacity of the equipment is improved. When the voltage of the power grid is low, the on-load voltage regulating switch of the compensation coil is adjusted to still provide compensation voltage higher than the voltage of the power grid, so that the reactive compensation capacity required by the electric equipment is not reduced due to the reduction of the voltage of the power grid.
As a preferred technical scheme of the invention:
the high-voltage winding is provided with a switch I and a switch II, two on-load voltage regulating switches are arranged, and the head ends A (B, C) of the compensating coil 1 are high-voltage incoming terminals of the power supply transformer and are connected with a power grid during operation;
the tail end of the compensation coil 1 is connected with the head end of the basic coil 2;
n1 tap taps are led out from the compensation coil 1 and are respectively connected with n1 contacts on the on-load tap changer II;
leading-out terminals A0(B0, C0) on the on-load tap changer II are connected with the fixed capacitor compensation device, and different voltages can be provided for the fixed capacitor compensation device by the leading-out terminals A0(B0, C0) through adjusting the on-load tap changer II;
the head end of the basic coil 2 is connected with the tail end of the compensation coil 1, and the tail end of the basic coil 2 is connected with the head end of the voltage regulating coil 3;
the tail end X (Y, Z) of the voltage regulating coil 3 is the tail end of the high-voltage winding of the power supply transformer, and the star connection or the angle connection of the high-voltage winding can be realized with the head end A (B, C);
the voltage regulating coil 3 is led out with n tap taps, which are respectively connected with n contacts on the on-load voltage regulating switch, and the low-voltage winding 4 can provide different required working voltages for the electric equipment by adjusting the on-load voltage regulating switch.
In summary, when the power supply transformer capable of dynamically adjusting the capacitance compensation capacity is used for supplying power to the electric equipment, the dynamic reactive power compensation of the electric equipment can be realized on the premise of adopting the fixed capacitance compensation device, so that the running power factor of the electric equipment is improved, the power consumption is saved, the capacity of the equipment is improved, the required capacitance compensation device has a simple structure, low cost and high reliability, and when the voltage of a power grid is low, the compensation voltage higher than the voltage of the power grid can still be provided by adjusting the on-load voltage regulation switch of the compensation coil, so that the reactive compensation capacity required by the electric equipment is not reduced due to the reduction of the voltage of the power grid.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. The utility model provides a can dynamically adjust power supply transformer of capacitance compensation capacity, includes power supply transformer and two on-load tap changer, its characterized in that: the power supply transformer is composed of a high-voltage winding and a low-voltage winding (4), wherein the high-voltage winding is formed by the self-coupling connection of a basic coil (2), a voltage regulating coil (3) and a compensation coil (1).
2. A power supply transformer with dynamically adjustable capacitance compensation capability according to claim 1, characterized by: the compensation coil (1) is positioned at a high-voltage wire inlet end of the high-voltage winding.
3. A power supply transformer with dynamically adjustable capacitance compensation capability according to claim 1, characterized by: the compensation coil (1) is provided with a tapping tap.
4. A power supply transformer with dynamically adjustable capacitance compensation capability according to claim 1, characterized by: the voltage regulating coil (3) is provided with a tapping tap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011327348.3A CN112382484A (en) | 2020-11-24 | 2020-11-24 | Power supply transformer capable of dynamically adjusting capacitance compensation capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011327348.3A CN112382484A (en) | 2020-11-24 | 2020-11-24 | Power supply transformer capable of dynamically adjusting capacitance compensation capacity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112382484A true CN112382484A (en) | 2021-02-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011327348.3A Withdrawn CN112382484A (en) | 2020-11-24 | 2020-11-24 | Power supply transformer capable of dynamically adjusting capacitance compensation capacity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112382484A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112309697A (en) * | 2020-11-26 | 2021-02-02 | 郴州杉杉新材料有限公司 | Power supply transformer capable of dynamically adjusting capacitance compensation capacity |
-
2020
- 2020-11-24 CN CN202011327348.3A patent/CN112382484A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112309697A (en) * | 2020-11-26 | 2021-02-02 | 郴州杉杉新材料有限公司 | Power supply transformer capable of dynamically adjusting capacitance compensation capacity |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210219 |
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| WW01 | Invention patent application withdrawn after publication |