CN118016399A - Voltage regulating system for autotransformer and autotransformer system - Google Patents
Voltage regulating system for autotransformer and autotransformer system Download PDFInfo
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Abstract
The invention discloses a voltage regulating system for an autotransformer and the autotransformer system. A voltage regulating system for an autotransformer, the autotransformer including a series winding wound on a main leg and a common winding, a head end of the series winding being connected to a high voltage terminal, a tail end of the series winding being connected to the head end of the common winding, the voltage regulating system comprising: the on-load voltage regulating device comprises an input end and an output end; the tail end of the common winding is connected to the input end of the on-load voltage regulating device through the polarity conversion switch device, the neutral point outgoing line of the autotransformer is connected to the output end of the on-load voltage regulating device through the polarity conversion switch device, and the polarity conversion switch device is provided with a first voltage regulating mode and a second voltage regulating mode. Realize more voltage regulation gears and realize bigger voltage regulation scope.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to a voltage regulating system for an autotransformer and the autotransformer system.
Background
A transformer is a device that changes an ac voltage using the principle of electromagnetic induction. Autotransformers are a common type of transformer. Traditionally, autotransformer voltage regulating windings are designed in the neutral region. In addition, the transformer voltage regulation is to change the number of turns of a winding (generally, a high-voltage winding) on one side of the transformer by regulating the tap of the winding through a voltage regulating switch (tap switch), so as to achieve the purpose of changing the output voltage. The transformer voltage regulating switch is divided into a transformer non-excitation switch and a transformer on-load switch, the transformer voltage regulating mode is divided into non-excitation voltage regulating and on-load voltage regulating, the on-load voltage regulating utilizes the on-load switch to regulate voltage by changing taps of a transformer winding under the condition of ensuring that load current is not cut off, and the on-load voltage regulating mode is generally used for transformers with strict voltage requirements and frequent gear shifting.
The maximum voltage regulating gear which can be realized by matching the main body winding of the current transformer with the on-load switch of the transformer and an independent voltage regulating winding is 35 gears. However, in an application place where more voltage-regulating gears are required to be realized without adding a plurality of transformers, thereby realizing a larger voltage-regulating range, the current voltage-regulating gears cannot meet the demands of users or markets.
Accordingly, there is a strong need for an improved transformer to achieve more voltage regulation steps and thus a larger voltage regulation range without the need for additional transformers.
Disclosure of Invention
In view of the above, the present invention provides a voltage regulating system, a voltage regulating method and an autotransformer system for an autotransformer, so as to solve some or all of the above problems.
According to an embodiment of the present invention, there is provided a voltage regulating system for an autotransformer including a series winding and a common winding wound on a main limb, a head end of the series winding being connected to a high voltage terminal, and a tail end of the series winding being connected to a head end of the common winding, the voltage regulating system comprising: the on-load voltage regulating device comprises an input end and an output end; and a polarity transfer switching device, wherein the tail end of the common winding is connected to the input end of the on-load voltage regulating device through the polarity transfer switching device, and a neutral point outgoing line of the autotransformer is connected to the output end of the on-load voltage regulating device through the polarity transfer switching device, and the polarity transfer switching device has a first voltage regulating mode and a second voltage regulating mode.
Preferably, the on-load voltage regulating device comprises a coarse voltage regulating winding, a fine voltage regulating winding and an on-load switch, wherein an outgoing line of the coarse voltage regulating winding is connected to the on-load switch, and the outgoing line of the coarse voltage regulating winding is connected to a head end of the fine voltage regulating winding through the on-load switch; and the polarity conversion switch device comprises a first terminal, a second terminal, a third terminal, a fourth terminal, a fifth terminal and a sixth terminal, wherein the first terminal is connected to a neutral point outgoing line of the autotransformer, the second terminal and the third terminal are connected to tail ends of the coarse voltage regulating windings, the fourth terminal is connected to tail ends of the common windings, and the fifth terminal and the sixth terminal are connected to first outgoing lines of the fine voltage regulating windings.
Preferably, in the first voltage regulation mode, the second terminal, the third terminal, and the fourth terminal of the polarity switching device are shorted to each other, and the first terminal, the fifth terminal, and the sixth terminal are shorted to each other; in the second voltage regulation mode, the first terminal, the second terminal, and the third terminal of the polarity switching device are shorted to each other, and the fourth terminal, the fifth terminal, and the sixth terminal are shorted to each other.
Preferably, in the first voltage regulation mode, a tail end of the coarse voltage regulation winding is used as an input end of the on-load voltage regulation device, and an outgoing line of the fine voltage regulation winding is used as an output end of the on-load voltage regulation device; in the second voltage regulation mode, the tail end of the coarse voltage regulation winding is used as the output end of the on-load voltage regulation device, and the outgoing line of the fine voltage regulation winding is used as the input end of the on-load voltage regulation device.
Preferably, each of the coarse voltage regulating winding and the fine voltage regulating winding includes a plurality of taps, each tap corresponding to one of the voltage regulating steps of the on-load voltage regulating device, the lead-out wire of the coarse voltage regulating winding connecting the tap of the coarse voltage regulating winding to the on-load switch, the lead-out wire of the fine voltage regulating winding connecting the tap of the fine voltage regulating winding to the fifth and sixth terminals of the polarity-reversing switch device.
Preferably, each of the coarse voltage regulating winding and the fine voltage regulating winding is wound on a side leg of the autotransformer.
Preferably, the coarse voltage regulating winding comprises a first coarse voltage regulating sub-winding and a second coarse voltage regulating sub-winding, the fine voltage regulating winding comprises a first fine voltage regulating sub-winding and a second fine voltage regulating sub-winding, the first coarse voltage regulating sub-winding is electrically connected with the first fine voltage regulating sub-winding in series and is formed into a first on-load voltage regulating sub-unit, the second coarse voltage regulating sub-winding is electrically connected with the second fine voltage regulating sub-winding in series and is formed into a second on-load voltage regulating sub-unit, and the first on-load voltage regulating sub-unit is electrically connected with the second on-load voltage regulating sub-unit in parallel.
Preferably, an excitation winding is sleeved on the side core column, the excitation winding, the coarse voltage regulating winding and the fine voltage regulating winding are arranged along the radial direction of the autotransformer, and the excitation winding is arranged on the inner sides of the coarse voltage regulating winding and the fine voltage regulating winding.
According to another aspect of the present invention, there is provided an autotransformer system comprising an autotransformer and a voltage regulating system according to any one of the preceding claims.
According to the scheme, the voltage regulating system for the autotransformer and the autotransformer system are provided, the voltage regulating switch of the heavy and thin voltage-regulating on-load switch is matched with the polarity transfer switch in a combined mode, the working gear can achieve +/-70 levels of voltage regulation at most, and the voltage regulating gear is further increased, so that the voltage regulating range is enlarged, the technical problem that the voltage regulating gear and the voltage regulating range of an existing single transformer cannot meet the requirements of users or markets is at least solved, and the technical effect that the voltage regulating range is enlarged by increasing the voltage regulating gear under the condition that a plurality of transformers are not required to be added is achieved.
Drawings
The above and other features and advantages of the present invention will become more apparent to those of ordinary skill in the art by describing in detail preferred embodiments thereof with reference to the attached drawings in which:
Fig. 1 shows a schematic electrical connection of a device implementing a voltage regulation function according to the prior art.
Fig. 2 shows a schematic diagram of the electrical connection of a voltage regulating system for an autotransformer in a first voltage regulating mode according to one embodiment of the invention.
Fig. 3 shows a schematic diagram of the electrical connection of the voltage regulating system for an autotransformer in a second voltage regulating mode according to one embodiment of the invention.
Fig. 4 shows a schematic diagram of a transformer winding arrangement according to an embodiment of the invention.
Detailed Description
The present invention will be further described in detail with reference to the following examples, in order to make the objects, technical solutions and advantages of the present invention more apparent.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.
In the present invention, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present invention.
Fig. 1 shows a schematic electrical connection of a device implementing a voltage regulation function according to the prior art. In fig. 1, the voltage regulating function is realized by a thickness voltage regulating switch. As shown in fig. 1, the autotransformer includes a series winding 102 wound on the core leg and a common winding 104, a head end of the series winding 102 is connected to the high voltage terminal 1 (e.g., the voltage at the high voltage terminal 1 is 750 kV), a tail end of the series winding 102 is connected to a head end of the common winding 104, and a lead wire is led between the series winding 102 and the common winding 104, and is connected to the medium voltage terminal 2 (e.g., the voltage at the medium voltage terminal 2 is 330 kV). The on-load switching system 106 includes a coarse voltage regulation winding 108, a fine voltage regulation winding 110, and an on-load switch 114, with the tail end of the coarse voltage regulation winding 108 (e.g., indicated by "-" in fig. 1) connected to the tail end of the common winding 104, the outlet of the coarse voltage regulation winding 108 connected to the head end of the fine voltage regulation winding 110 via the on-load switch 114, and the outlet of the fine voltage regulation winding 110 connected to the neutral outlet 3. Although each of the coarse and fine voltage regulation windings 108, 110 may be configured to include a plurality of taps, each tap corresponding to one of the voltage regulation steps of the on-load switching system 106, the lead-out of the coarse voltage regulation winding in turn connects the corresponding tap of the coarse voltage regulation winding to the on-load switch, and the lead-out of the fine voltage regulation winding connects the corresponding tap of the fine voltage regulation winding to the neutral lead-out. But limited by the switch gear limits, the maximum operating gear currently achievable is +/-17 steps of voltage regulation, i.e., 35 operating gears. There is currently no method that can be implemented if the customer has more demand for a gear step. For example, some project customers have more demands on the voltage regulation operating range, such as +/-20 steps.
Next, a voltage regulating system of an autotransformer is described with reference to fig. 2 to 4, which is capable of achieving more operating gears, for example, up to +/-70 steps of voltage regulation, by means of a coarse and fine voltage regulating on-load voltage regulating switch equipped with a polarity transfer switch.
Fig. 2 shows a schematic diagram of the electrical connection of a voltage regulating system for an autotransformer in a first voltage regulating mode according to one embodiment of the invention. As shown in fig. 2, the autotransformer includes a series winding 202 and a common winding 204 wound on the core leg, a head end of the series winding 202 is connected to a high voltage terminal 2-1 (e.g., the voltage at the high voltage terminal 2-1 is 750 kV), a tail end of the series winding 202 is connected to a head end of the common winding 204, and a lead wire is led between the series winding 202 and the common winding 204, the lead wire being connected to a medium voltage terminal 2-2 (e.g., the voltage at the medium voltage terminal 2-2 is 330 kV). A voltage regulating system for an autotransformer comprising: an on-load voltage regulator 206 and a polarity reversing switch 212. The on-load voltage regulator 206 includes a coarse voltage regulation winding 208, a fine voltage regulation winding 210, and an on-load switch 214, with the outlet of the coarse voltage regulation winding 208 being connected to the head end of the fine voltage regulation winding 210 via the on-load switch 214. As shown in fig. 2, each of the coarse and fine voltage regulation windings 208, 210 may be configured to include a plurality of taps, each tap corresponding to one of the voltage regulation gears of the on-load voltage regulation device 206. For example, the fine voltage-regulating winding 210 is provided to include eleven taps (i.e., first gear tap 1T to eleventh gear tap 11T as shown in fig. 2). The polarity switching device 212 includes a first terminal 1, a second terminal 2, a third terminal 3, a fourth terminal 4, a fifth terminal 5, and a sixth terminal 6, wherein the first terminal 1 is connected to a neutral point outlet 2-3 of the autotransformer, the second terminal 2 and the third terminal 3 are connected to a tail end of the coarse voltage-regulating winding 208 (e.g., indicated by "-" in fig. 2), the fourth terminal 4 is connected to a tail end of the common winding 204, and the fifth terminal 5 and the sixth terminal 6 are connected to an outlet of the fine voltage-regulating winding 210. The polarity switching device 212 has a first voltage regulation mode and a second voltage regulation mode. Fig. 2 shows a circuit connection of the polarity switching device 212 in the first voltage regulation mode, that is, the second terminal 2, the third terminal 3, and the fourth terminal 4 are shorted to each other, and the first terminal 1, the fifth terminal 5, and the sixth terminal 6 are shorted to each other. In the first voltage regulation mode, the tail end of the coarse voltage regulation winding 208 serves as the input to the on-load voltage regulator 206 and the tail end of the fine voltage regulation winding 210 (the portion of 210 shown in fig. 2 corresponding to the right arrow) serves as the output of the on-load voltage regulator. As shown in fig. 2, which shows a schematic diagram of the circuit connection in the case of a maximum positive tap. In this maximum positive tap condition, the voltage at neutral point tap 2-3 is the maximum positive voltage since on-load switch 214 is connected to the tap of coarse voltage regulation winding 208 closest to the head end (e.g., indicated by "+" in fig. 2) via the lead-out of coarse voltage regulation winding 208, and the lead-out of fine voltage regulation winding 210 connects the first gear tap 1T of fine voltage regulation winding 210 to fifth terminal 5 and sixth terminal 6. As shown in fig. 2, the fine voltage-regulating winding 210 is provided to include eleven taps (i.e., the first gear tap 1T to the eleventh gear tap 11T as shown in fig. 2), and similarly, the coarse voltage-regulating winding 208 is provided to also include eleven taps, and thus +20-stage voltage regulation can be achieved.
Fig. 3 shows a schematic diagram of the electrical connection of the voltage regulating system for an autotransformer in a second voltage regulating mode according to one embodiment of the invention. As shown in fig. 3, the autotransformer includes a series winding 302 wound on the core leg and a common winding 304, the head end of the series winding 302 being connected to the high voltage terminal 3-1 (e.g., the voltage at the high voltage terminal 3-1 is 750 kV), the tail end of the series winding 302 being connected to the head end of the common winding 304, a lead-out wire being led between the series winding 302 and the common winding 304, the lead-out wire being connected to the medium voltage terminal 3-2 (e.g., the voltage at the medium voltage terminal 3-2 is 330 kV). A voltage regulating system for an autotransformer comprising: an on-load voltage regulator 306 and a polarity reversing switch 312. The on-load voltage regulator 306 includes a coarse voltage regulating winding 308, a fine voltage regulating winding 310, and an on-load switch 314, with the outlet of the coarse voltage regulating winding 308 being connected to the head end of the fine voltage regulating winding 310 via the on-load switch 314. As shown in fig. 3, each of the coarse and fine voltage regulation windings 308, 310 may be configured to include a plurality of taps, each tap corresponding to one of the voltage regulation gears of the on-load voltage regulation device 306. For example, the fine voltage-regulating winding 310 is provided to include eleven taps (i.e., first gear tap 1T to eleventh gear tap 11T as shown in fig. 3). The polarity switching device 312 includes a first terminal 1, a second terminal 2, a third terminal 3, a fourth terminal 4, a fifth terminal 5, and a sixth terminal 6, wherein the first terminal 1 is connected to the neutral point lead-out terminal 3-3 of the autotransformer, the second terminal 2 and the third terminal 3 are connected to the tail end of the coarse voltage-regulating winding 308 (e.g., indicated by "-" in fig. 3), the fourth terminal 4 is connected to the tail end of the common winding 304, and the fifth terminal 5 and the sixth terminal 6 are connected to the lead-out wire of the fine voltage-regulating winding 310. The polarity switching device 312 has a first voltage regulation mode and a second voltage regulation mode. Fig. 3 shows a circuit connection of the polarity switching device 312 in the second voltage regulation mode, that is, the first terminal 1, the second terminal 2, and the third terminal 3 are shorted to each other, and the fourth terminal 4, the fifth terminal 5, and the sixth terminal 6 are shorted to each other. In the second voltage regulation mode, the tail end of the coarse voltage regulation winding 308 serves as the output of the on-load voltage regulator 206 and the lead-out wire of the fine voltage regulation winding 310 (the portion of 310 shown in fig. 3 corresponding to the right arrow) serves as the input of the on-load voltage regulator. As shown in fig. 3, a schematic diagram of the circuit connection in the case of a minimum negative tap is shown. In this minimum negative tap condition, the neutral point lead-out 3-3 is connected to the tail end of the coarse voltage regulating winding 308 (e.g., shown by "-" in fig. 3), and the voltage at the neutral point lead-out 3-3 is therefore the minimum negative voltage since the on-load switch 314 is connected to the tap of the coarse voltage regulating winding 308 closest to the head end (e.g., shown by "+" in fig. 3) via the lead-out of the coarse voltage regulating winding 308, and the lead-out of the fine voltage regulating winding 310 connects the first gear tap 1T of the fine voltage regulating winding 310 to the fifth terminal 5, and the sixth terminal 6. As shown in fig. 3, the fine voltage-regulating winding 310 is provided to include eleven taps (i.e., the first gear tap 1T to the eleventh gear tap 11T as shown in fig. 3), and similarly, the coarse voltage-regulating winding 308 is provided to also include eleven taps, and thus, level-20 voltage regulation can be achieved.
Thus, a voltage regulating system and method of an autotransformer is described by means of fig. 2 to 3, which enables more operating gears by means of a coarse and fine voltage regulating on-load voltage regulating switch equipped with a polarity transfer switch, for example, as shown in fig. 2 to 3, up to +/-20 steps of voltage regulation, i.e. 41 operating gears. As will be appreciated by those skilled in the art, various operating gears can be achieved by providing different numbers of taps depending on the actual needs. For example, a +/-35-stage regulation, i.e., 71 operating ranges, is achieved.
Fig. 4 shows a schematic diagram of a transformer winding arrangement according to an embodiment of the invention. As shown in fig. 4, the winding is sequentially performed on the main stem 402 from inside to outside along the radial direction of the transformer: low voltage winding 404, common winding 406, series windings 408-1 and 408-2. Winding sequentially from inside to outside along the radial direction of the transformer on the side stem 410: the excitation winding 412, and first and second coarse and fine voltage regulating sub-windings 416-1 and 416-2, 414-1 and 414-2 wound in concentric fashion. Wherein, the first coarse voltage regulating sub-winding 416-1 is electrically connected in series with the first fine voltage regulating sub-winding 414-1 and is configured as a first on-load voltage regulating sub-unit, the second coarse voltage regulating sub-winding 416-2 is electrically connected in series with the second fine voltage regulating sub-winding 414-2 and is configured as a second on-load voltage regulating sub-unit, and the first on-load voltage regulating sub-unit is electrically connected in parallel with the second on-load voltage regulating sub-unit.
A voltage regulating method for an autotransformer according to one embodiment of the present invention may include the steps of: connecting an outgoing line of the rough regulating voltage regulating winding of the on-load voltage regulating device to the head end of the fine regulating voltage regulating winding of the on-load voltage regulating device through an on-load switch; connecting a first terminal of the polarity switching device to a neutral point lead of the autotransformer, connecting a second terminal and a third terminal of the polarity switching device to a tail end of the coarse voltage regulating winding, connecting a fourth terminal of the polarity switching device to a tail end of the common winding, and connecting a fifth terminal and a sixth terminal of the polarity switching device to a lead of the fine voltage regulating winding; and switching the polarity switching device between a first voltage regulation mode and a second voltage regulation mode, wherein in the first voltage regulation mode, the second terminal, the third terminal, and the fourth terminal are shorted to each other, and the first terminal, the fifth terminal, and the sixth terminal are shorted to each other; in the second voltage regulation mode, the first terminal, the second terminal, and the third terminal are shorted to each other, and the fourth terminal, the fifth terminal, and the sixth terminal are shorted to each other.
In the circuit diagrams shown in fig. 2 and 3, although the first, second, third, fourth, fifth, and sixth terminals of the polarity-switching device are short-circuited to each other so as to be arranged in a clockwise manner in order to realize the above-described connection of the first, second, third, fifth, and sixth terminals of the polarity-switching device in a more convenient way, as will be appreciated by those skilled in the art, the first, second, third, fourth, fifth, and sixth terminals of the polarity-switching device may be arranged in any other manner as long as the above-described connection of the first, second, third, fourth, fifth, and sixth terminals of the polarity-switching device with the respective other components of the voltage regulating system is satisfied.
According to the scheme, the voltage regulating system for the autotransformer and the autotransformer system are provided, the mode that the polarity transfer switch is arranged on the heavy and thin voltage-regulating on-load voltage regulating switch can be adopted, the working gear can achieve +/-70 levels of voltage regulation at most, and the voltage regulating gear is further increased, so that the technical scheme of expanding the voltage regulating range is achieved, the technical problem that the voltage regulating gear and the voltage regulating range of an existing single transformer cannot meet the requirements of users or markets is at least solved, and the technical effect that the voltage regulating range is expanded by increasing the voltage regulating gear under the condition that a plurality of transformers are not needed is achieved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (9)
1. A voltage regulating system for an autotransformer, the autotransformer including a series winding and a common winding wound on a main limb, a head end of the series winding being connected to a high voltage terminal, a tail end of the series winding being connected to a head end of the common winding, the voltage regulating system comprising:
The on-load voltage regulating device comprises an input end and an output end; and
A polarity switching device, wherein the tail end of the common winding is connected to the input end of the on-load voltage regulating device through the polarity switching device, the neutral point outgoing line of the autotransformer is connected to the output end of the on-load voltage regulating device through the polarity switching device,
The polarity switching device is provided with a first voltage regulating mode and a second voltage regulating mode.
2. The voltage regulating system for an autotransformer of claim 1, wherein the on-load voltage regulating device includes a coarse voltage regulating winding, a fine voltage regulating winding, and an on-load switch, an outlet of the coarse voltage regulating winding being connected to the on-load switch, and the outlet of the coarse voltage regulating winding being connected to a head end of the fine voltage regulating winding via the on-load switch; and
The polarity conversion switch device comprises a first terminal, a second terminal, a third terminal, a fourth terminal, a fifth terminal and a sixth terminal, wherein the first terminal is connected to a neutral point outgoing line of the autotransformer, the second terminal and the third terminal are connected to tail ends of the coarse voltage regulating windings, the fourth terminal is connected to tail ends of the common windings, and the fifth terminal and the sixth terminal are connected to outgoing lines of the fine voltage regulating windings.
3. A voltage regulating system for an autotransformer as claimed in claim 2, wherein,
In the first voltage regulation mode, the second terminal, the third terminal, and the fourth terminal of the polarity switching device are shorted to each other, and the first terminal, the fifth terminal, and the sixth terminal are shorted to each other;
in the second voltage regulation mode, the first terminal, the second terminal, and the third terminal of the polarity switching device are shorted to each other, and the fourth terminal, the fifth terminal, and the sixth terminal are shorted to each other.
4. A voltage regulating system for an autotransformer as claimed in claim 2, wherein,
In the first voltage regulation mode, the tail end of the coarse voltage regulation winding is used as the input end of the on-load voltage regulation device, and the outgoing line of the fine voltage regulation winding is used as the output end of the on-load voltage regulation device;
in the second voltage regulation mode, the tail end of the coarse voltage regulation winding is used as the output end of the on-load voltage regulation device, and the outgoing line of the fine voltage regulation winding is used as the input end of the on-load voltage regulation device.
5. The voltage regulating system for an autotransformer of any one of claims 2 to 4, wherein each of the coarse and fine voltage regulating windings includes a plurality of taps, each tap corresponding to one of the voltage regulating steps of the on-load voltage regulating device, a lead of the coarse voltage regulating winding connecting one of the taps of the coarse voltage regulating winding to the on-load switch, a lead of the fine voltage regulating winding connecting one of the taps of the fine voltage regulating winding to the fifth and sixth terminals of the polarity-switching device.
6. The voltage regulating system for an autotransformer of any one of claims 2 to 4, wherein each of the coarse and fine voltage regulating windings is wound on a side leg of the autotransformer.
7. The voltage regulation system for an autotransformer of claim 6, wherein the coarse voltage regulation winding includes a first coarse voltage regulation sub-winding and a second coarse voltage regulation sub-winding, the fine voltage regulation winding includes a first fine voltage regulation sub-winding and a second fine voltage regulation sub-winding, the first coarse voltage regulation sub-winding is electrically connected in series with the first fine voltage regulation sub-winding and configured as a first on-load voltage regulation sub-unit, and the second coarse voltage regulation sub-winding is electrically connected in series with the second fine voltage regulation sub-winding and configured as a second on-load voltage regulation sub-unit, the first on-load voltage regulation sub-unit is electrically connected in parallel with the second on-load voltage regulation sub-unit.
8. The voltage regulating system for an autotransformer of claim 7, wherein said side leg is sleeved with an excitation winding, and said excitation winding, said coarse voltage regulating winding, and said fine voltage regulating winding are disposed radially of said autotransformer, said excitation winding being disposed inboard of said coarse voltage regulating winding, and said fine voltage regulating winding.
9. An autotransformer system comprising an autotransformer and a voltage regulating system according to any one of claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410192112.5A CN118016399A (en) | 2024-02-20 | 2024-02-20 | Voltage regulating system for autotransformer and autotransformer system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410192112.5A CN118016399A (en) | 2024-02-20 | 2024-02-20 | Voltage regulating system for autotransformer and autotransformer system |
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| CN202410192112.5A Pending CN118016399A (en) | 2024-02-20 | 2024-02-20 | Voltage regulating system for autotransformer and autotransformer system |
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