CN215578154U - Phase modulation transformer with large phase shift angle - Google Patents
Phase modulation transformer with large phase shift angle Download PDFInfo
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- CN215578154U CN215578154U CN202121682546.1U CN202121682546U CN215578154U CN 215578154 U CN215578154 U CN 215578154U CN 202121682546 U CN202121682546 U CN 202121682546U CN 215578154 U CN215578154 U CN 215578154U
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Abstract
The utility model relates to a phase modulation transformer with a large phase shift angle, belonging to the technical field of phase modulation transformers. The technical scheme is as follows: the series transformer (1) is connected with a system line in series, the no-load switch (8) and the load switch (9) are arranged on two sides of the exciting transformer (2), the balance transformer (3) is provided with a forced shunt balance transformer, a lead of the series transformer (1) is connected with the forced shunt balance transformer through the no-load switch (8), and a lead of the exciting transformer (2) is connected with the forced shunt balance transformer through the load switch (9). The utility model has the beneficial effects that: the phase modulation angle range is increased by matching the no-load switch and the load switch; the bias winding is arranged, the number of turns of a phase modulation coil is reduced, the switching requirement is met, and the phase angle regulation range is enlarged; the three-phase switch is used as a single phase, so that the capacity of a switch stage is increased; the forced shunt balancing transformer balances the single-phase three-branch current of the switch; the phase modulation coil is fixed in outgoing line partition, and wiring is facilitated.
Description
Technical Field
The utility model relates to a phase modulation transformer with a large phase shift angle, belonging to the technical field of phase modulation transformers.
Background
In the development of power systems, many high-voltage power grids are connected together to improve the reliability of energy and realize power exchange within an ultra-long distance. Grid management is increasingly complicated by factors such as changes in generator output power and changes in electrical energy demand, which must be managed to avoid potentially catastrophic disturbances of the system. The phase modulation transformer is used as a preferred tool, and the power flow of the power grid can be effectively controlled to stabilize the power grid. Along with the increasingly complex construction of urban power grids, the demand for flexibly controlling the trend is more and more urgent, and the demand for phase change is more and more important for the power department. The phase modulation angle is an important parameter of the phase modulation transformer, and has a direct relation with the transmission power thereof, namely the structure capacity. The no-load phase modulation angle of some phase modulation transformers reaches +/-74.5 degrees, and the phase modulation transformers have large phase modulation angle range and complex structure.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a phase modulation transformer with a large phase shift angle, which increases the phase modulation angle range by matching a no-load switch and a load switch; the bias winding is arranged, the number of turns of a phase modulation coil is reduced, the switching requirement is met, and the phase angle regulation range is enlarged; the three-phase switch is used as a single phase, so that the capacity of a switch stage is increased; the forced shunt balancing transformer balances the single-phase three-branch current of the switch; the phase modulation coil is fixed in outgoing line partition, convenient for wiring, large in phase modulation angle range and easy to realize, and the problems in the background art are effectively solved.
The technical scheme of the utility model is as follows: a phase modulation transformer with a large phase shift angle comprises a series transformer, an exciting transformer, a balance transformer, a source side sleeve, a load side sleeve, a first sleeve, a second sleeve, an unloaded switch and a loaded switch, wherein the series transformer is connected with a system line in series; the first sleeve and the second sleeve are arranged at the top end of the excitation transformer, the first sleeve is led out for grounding connection, the second sleeve is led out from the tail end of the phase modulation winding, the three phases of the second sleeve are connected together for grounding, and the no-load switch and the load switch are arranged on two sides of the excitation transformer; the balancing transformer is provided with a forced shunt balancing transformer, a lead of the series transformer is connected with the forced shunt balancing transformer through a no-load switch, a lead of the exciting transformer is connected with the forced shunt balancing transformer through a load switch, and the no-load switch is matched with the load switch.
A phase modulation loop of the excitation transformer is provided with a bias winding, a no-load switch is connected with the bias winding, the input, the forward access and the reverse access of the bias winding are controlled, and a phase angle is divided into three ranges; the bias winding is cut off through a no-load switch, and a common positive and negative phase adjusting angle is formed at the moment; reversely connecting the bias winding in series through a no-load switch, and adjusting the phase modulation range to a phase-reversal maximum phase angle of 0 degree; the phase modulation range is pushed to 0 DEG to the maximum phase angle in the positive direction by connecting the no-load switch into the bias winding in series in the positive direction.
The on-load switch is a three-phase on-load switch, and the on-load switch is connected to a single-phase circuit, namely, each phase circuit is provided with one three-phase on-load switch.
Phase modulation windings of the series transformer and the excitation transformer are arranged according to proper tap numbers, and lead wires connected to the no-load switch and the load switch are of a structure that a copper bar is transited to a cable; the lead wires are divided into an upper phase modulation lead wire, a lower phase modulation lead wire, an inner layer phase modulation lead wire and an outer layer phase modulation lead wire, and a regional fixing mode is adopted; at the hookup location of bar copper and cable, be equipped with according to different angles in each bar copper junction in advance and buckle for the cable can stagger each other, the operation of being convenient for work a telephone switchboard.
The utility model has the beneficial effects that: the phase modulation angle range is increased by matching the no-load switch and the load switch; the bias winding is arranged, the number of turns of a phase modulation coil is reduced, the switching requirement is met, and the phase angle regulation range is enlarged; the three-phase switch is used as a single phase, so that the capacity of a switch stage is increased; the forced shunt balancing transformer balances the single-phase three-branch current of the switch; the phase modulation coil is fixed in outgoing line partition, and wiring is facilitated.
Drawings
FIG. 1 is a wiring schematic of the present invention;
FIG. 2 is a front view of the structure of the present invention;
FIG. 3 is a top view of the structure of the present invention;
FIG. 4 is a front view of the phase modulating coil lead wire of the present invention;
FIG. 5 is a top view of the phase modulating coil lead wire of the present invention;
in the figure: the device comprises a series transformer 1, an exciting transformer 2, a balance transformer 3, a source side bushing 4, a load side bushing 5, a first bushing 6, a second bushing 7, an unloaded switch 8, a loaded switch 9, an upper phase modulation lead wire 10, a lower phase modulation lead wire 11, an inner phase modulation lead wire 12 and an outer phase modulation lead wire 13.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and embodiments, which are preferred embodiments of the present invention. It is to be understood that the described embodiments are merely a subset of the embodiments of the utility model, and not all embodiments; it should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A phase modulation transformer with a large phase shift angle comprises a series transformer 1, an exciting transformer 2, a balance transformer 3, a source side sleeve 4, a load side sleeve 5, a first sleeve 6, a second sleeve 7, an unloaded switch 8 and a loaded switch 9, wherein the series transformer 1 is connected with a system line in series, the series transformer 1 is connected with one end of the system line through the source side sleeve 4, and is connected with the other end of the line for changing the phase angle through the load side sleeve 5; the first sleeve 6 and the second sleeve 7 are arranged at the top end of the excitation transformer 2, the first sleeve 6 is led out to be connected with the ground, the second sleeve 7 is led out from the tail end of the phase modulation winding, the three phases of the second sleeve 7 are connected together to be grounded, and the no-load switch 8 and the load switch 9 are arranged on two sides of the excitation transformer 2; the balancing transformer 3 is provided with a forced shunt balancing transformer, a lead of the series transformer 1 is connected with the forced shunt balancing transformer through a no-load switch 8, a lead of the exciting transformer 2 is connected with the forced shunt balancing transformer through a load switch 9, and the no-load switch 8 is matched with the load switch 9.
A phase modulation loop of the excitation transformer 2 is provided with a bias winding, a no-load switch 8 is connected with the bias winding, the input, the forward access and the reverse access of the bias winding are controlled, and a phase angle is divided into three ranges; the bias winding is cut off through the no-load switch 8, and the normal positive and negative phase adjusting angle is formed at the moment; reversely and serially connecting the non-load switch 8 into the bias winding to adjust the phase modulation range to the phase-reversal maximum phase angle of 0 degree; the phase modulation range is pushed to 0 DEG to the positive maximum phase angle by the forward series connection of the no-load switch 8 into the bias winding.
The on-load switch 9 is a three-phase on-load switch, and the on-load switch 9 is connected to a single-phase circuit, that is, each phase circuit is provided with a three-phase on-load switch.
Phase modulation windings of the series transformer 1 and the exciting transformer 2 are arranged according to proper tap numbers, and lead wires connected to the no-load switch 8 and the load switch 9 are of a structure that a copper bar is transited to a cable; the lead wires are divided into an upper phase modulation lead wire 10, a lower phase modulation lead wire 11, an inner phase modulation lead wire 12 and an outer phase modulation lead wire 13, and a regional fixing mode is adopted; at the hookup location of bar copper and cable, be equipped with according to different angles in each bar copper junction in advance and buckle for the cable can stagger each other, the operation of being convenient for work a telephone switchboard.
In practical application, the utility model mainly comprises three parts, namely a series transformer, an excitation transformer and a balance transformer, wherein the series transformer 1 is used for being connected with a system line in series, a source side bushing 4 of the series transformer is used for being connected with one end of the system line, and a load side bushing 5 is used for being connected with the other end of the line, which changes a phase angle. The exciting transformer 2 is used for adjusting the phase difference between the input end and the output end of the series transformer 1 and the switching of the phase modulation interval, a first sleeve 6 on the exciting transformer 2 is led out to be connected with the ground, a second sleeve 7 of the exciting transformer 2 is led out from the tail end of the phase modulation winding, and the three phases of the sleeves are connected together and grounded. The balancing transformer 3 is used for connecting the lead wires between the series transformer 1 and the excitation transformer 2 and placing a forced shunt balancing transformer.
In order to solve the problem of large phase angle range, the phase angle is divided into three ranges, a bias winding is additionally arranged on a phase modulation loop of an exciting transformer 2, and a positive and negative modulation excitation-free switch is used for controlling the input, the positive access and the reverse access of the bias winding so as to realize three-stage phase modulation. The bias winding is cut off through the no-load switch 8, and the normal positive and negative phase adjusting angle is formed at the moment; reversely and serially connecting the non-load switch 8 into the bias winding to adjust the phase modulation range to the phase-reversal maximum phase angle of 0 degree; the phase modulation range is pushed to 0 DEG to the maximum phase angle of the positive phase by the forward series connection of the no-load switch 8 into the bias winding.
The phase modulation coil of the phase modulation transformer has larger current, and the maximum rated current and the level capacity of the on-load switch 9 are limited, so that the level capacity of the phase modulation winding exceeds the maximum level capacity requirement of a single-phase switch, and the requirement of normal operation of a product cannot be met. The on-load switch 9 is a three-phase on-load switch, and the three-phase on-load switch is connected to a single-phase circuit, namely, each phase circuit uses one three-phase on-load switch, and the current of the single-phase circuit is divided into three paths to pass through the on-load switch 9, so that the through-current capacity of the on-load switch 9 is improved to 3 times of the original capacity, and the requirement of switch-level capacity is met. The three-phase on-load switch connected to the single-phase circuit needs to have absolutely average current passing through each parallel branch, so that the problem of three-way current balance needs to be solved. A forced shunt balance transformer is connected in front of the on-load switch 9, and the same-phase shunt circuit connected with the three-phase on-load switch is divided into three branches by using the winding electromagnetic balance principle, so that the same-phase three-way current is ensured to be balanced under any condition. The no-load switch 8 and the load switch 9 are matched for use, so that the problem of large phase angle adjustment is solved. The phase modulation winding has large current, and three branches of parallel operation are required to be realized.
The phase modulation windings are arranged according to proper tapping numbers, so that the loss generated by circulating current between tapping leads can be effectively reduced. The tap leads connected to the no-load switch 8 and the load switch 9 adopt a copper bar to cable transition configuration. The copper bar current-carrying is big, has taken upper portion phase modulation lead wire 10 simultaneously, lower part phase modulation lead wire 11, inlayer phase modulation lead wire 12, outer phase modulation lead wire 13 subregion's fixed mode, and in the hookup location of copper bar and cable, buckle each copper bar junction according to different angles in advance for the cable can stagger each other, the operation of being convenient for work a telephone switchboard.
Claims (3)
1. A phase modulation transformer with large phase shift angle is characterized in that: the series transformer (1) is connected with a system line in series, the series transformer (1) is connected with one end of the system line through the source side sleeve (4), and is connected with the other end of the line for changing a phase angle through the load side sleeve (5); the first sleeve (6) and the second sleeve (7) are arranged at the top end of the exciting transformer (2), the first sleeve (6) is led out to be connected with the ground, the second sleeve (7) is led out from the tail end of the phase modulation winding, the three phases of the second sleeve (7) are connected together to be grounded, and the no-load switch (8) and the on-load switch (9) are arranged on the two sides of the exciting transformer (2); a forced shunt balance transformer is placed in the balance transformer (3), a lead of the series transformer (1) is connected with the forced shunt balance transformer through a no-load switch (8), a lead of the exciting transformer (2) is connected with the forced shunt balance transformer through a load switch (9), and the no-load switch (8) is matched with the load switch (9).
2. The large phase shifting angle phase modulating transformer of claim 1 wherein: a phase modulation loop of the excitation transformer (2) is provided with a bias winding, a no-load switch (8) is connected with the bias winding, the input, the forward access and the reverse access of the bias winding are controlled, and a phase angle is divided into three ranges; the bias winding is cut off through a no-load switch (8), and a common positive and negative phase adjusting angle is formed at the moment; the phase modulation range is pushed to the phase-reversal maximum phase angle to 0 degree by reversely connecting the no-load switch (8) in series into the bias winding; the phase modulation range is pushed to 0 DEG to the positive maximum phase angle by the forward series connection of the no-load switch (8) into the bias winding.
3. The large phase shifting angle phase modulating transformer of claim 1 wherein: the on-load switch (9) is a three-phase on-load switch, the on-load switch (9) is connected to a single-phase circuit, namely, each phase circuit is provided with a three-phase on-load switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121682546.1U CN215578154U (en) | 2021-07-23 | 2021-07-23 | Phase modulation transformer with large phase shift angle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121682546.1U CN215578154U (en) | 2021-07-23 | 2021-07-23 | Phase modulation transformer with large phase shift angle |
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| CN215578154U true CN215578154U (en) | 2022-01-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113611513A (en) * | 2021-07-23 | 2021-11-05 | 保定天威保变电气股份有限公司 | Phase modulation transformer with large phase shift angle |
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2021
- 2021-07-23 CN CN202121682546.1U patent/CN215578154U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113611513A (en) * | 2021-07-23 | 2021-11-05 | 保定天威保变电气股份有限公司 | Phase modulation transformer with large phase shift angle |
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