CN216390531U - New forms of energy booster station owner becomes low pressure side secondary voltage collection system - Google Patents
New forms of energy booster station owner becomes low pressure side secondary voltage collection system Download PDFInfo
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- CN216390531U CN216390531U CN202123073576.5U CN202123073576U CN216390531U CN 216390531 U CN216390531 U CN 216390531U CN 202123073576 U CN202123073576 U CN 202123073576U CN 216390531 U CN216390531 U CN 216390531U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model discloses a secondary voltage acquisition system at the low-voltage side of a main transformer of a new energy booster station, which comprises a main transformer, a full-insulation tubular bus, a #135kV main transformer inlet cabinet, a #235kV main transformer inlet cabinet, a PT cabinet, a 35kV I section bus and a 35kV II section bus; the low-voltage side of the main transformer is connected with the input end of a #135kV main transformer inlet cabinet, the input end of a #235kV main transformer inlet cabinet and a PT cabinet through a fully insulated tubular bus, the output end of the #135kV main transformer inlet cabinet is connected with a 35kV I section bus, and the output end of the #235kV main transformer inlet cabinet is connected with a 35kV II section bus.
Description
Technical Field
The utility model relates to a voltage acquisition system, in particular to a secondary voltage acquisition system at the low-voltage side of a main transformer of a new energy booster station.
Background
Because the 35kV circuit breaker is limited in manufacturing level, the low-voltage 35kV side of a main transformer with the capacity larger than 180MVA is generally connected by an expansion unit, namely the low-voltage side of the main transformer is connected to two sections of 35kV buses through two main transformer incoming line cabinets. Generally, for such wiring, two sections of 35kV buses are respectively provided with one PT cabinet, and are configured with two PT cabinets, and each PT cabinet is respectively used for providing metering, measuring and protection level secondary voltages for each loop measurement and control protection device, the metering device and the main transformer protection measurement and control device on the 35kV section where the PT cabinet is located; two secondary voltage acquisition points are provided, namely a 35kV I section bus and a 35kV II section bus; when the number of unit wires in a new grid-connected energy system is increased, the number of required PT cabinets is increased, the cost of the system is increased sharply, and the complexity of the system is high, so that the stability of the system is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides a secondary voltage acquisition system at the low-voltage side of a main transformer of a new energy booster station, which can reduce the cost of a grid-connected new network energy system and improve the stability of the grid-connected new network energy system.
In order to achieve the purpose, the secondary voltage acquisition system at the main transformer low-voltage side of the new energy booster station comprises a main transformer, a full-insulation tubular bus, a #135kV main transformer incoming cabinet, a #235kV main transformer incoming cabinet, a PT cabinet, a 35kV I section bus and a 35kV II section bus;
the low-voltage side of the main transformer is connected with the input end of a #135kV main transformer inlet cabinet, the input end of a #235kV main transformer inlet cabinet and a PT cabinet through a fully insulated tubular bus, the output end of the #135kV main transformer inlet cabinet is connected with a 35kV I section bus, and the output end of the #235kV main transformer inlet cabinet is connected with a 35kV II section bus.
The transformer neutral point complete device is connected with a main transformer.
The #135kV main transformer inlet wire cabinet and the #235kV main transformer inlet wire cabinet both comprise vacuum circuit breakers, wherein one end of each vacuum circuit breaker is connected with a full-insulation tubular bus, the other end of each vacuum circuit breaker in the #135kV main transformer inlet wire cabinet is connected with a 35kV I section bus, and the other end of each vacuum circuit breaker in the #235kV main transformer inlet wire cabinet is connected with a 35kV II section bus.
And a current transformer and a first live-wire display are arranged on a wire between the vacuum circuit breaker and the all-insulation tubular bus.
And a first lightning arrester is connected on a wire between the all-insulation tubular bus and the main transformer.
The PT cabinet comprises a fuse, a voltage transformer and a harmonic elimination device, wherein the all-insulated tubular bus is grounded after passing through the fuse, the voltage transformer and the harmonic elimination device.
And a second electrified display, a third electrified display and a second lightning arrester are connected on a line between the fuse and the full-insulation tubular bus.
The main transformer neutral point complete device comprises a discharge gap and a gap current transformer, wherein the main transformer 1 is grounded through the discharge gap and the gap current transformer.
The lightning arrester also comprises a neutral point isolating switch and a third lightning arrester; one end of the neutral point isolating switch and one end of the third lightning arrester are both connected with a line between the main transformer and the discharge gap, and the other end of the neutral point isolating switch and the other end of the third lightning arrester are both grounded.
The utility model has the following beneficial effects:
when the secondary voltage acquisition system at the low-voltage side of the main transformer of the new energy booster station is in specific operation, based on the grid-connected new network energy system, the secondary voltages required by metering, measuring and protection of each loop measurement and control protection device, a metering device and a main transformer protection and control device on each 35kV section bus can be directly acquired from the low-voltage side of the main transformer, so that the grid-connected new network energy system is improved, the PT cabinet is directly connected with the low-voltage side of the main transformer through the all-insulation tubular bus, the voltage at the low-voltage side of the main transformer is directly acquired through the PT cabinet, the cost of the grid-connected new network energy system is reduced, and the stability of the grid-connected new network energy system is improved.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is main transformer, 2 is full insulation tubular busbar, 3 is #135kV main transformer inlet wire cabinet, 4 is #235kV main transformer inlet wire cabinet, 5 is PT cabinet, 6 is main transformer neutral point integrated equipment, 7 is 35kV I section busbar, 8 is 35kV II section busbar.
Detailed Description
In order to make the technical solutions of the present invention better understood, 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, not all of the embodiments, and are not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. 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.
There is shown in the drawings a schematic block diagram of a disclosed embodiment in accordance with the utility model. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
Referring to fig. 1, the system for acquiring secondary voltage at the main transformer low-voltage side of the new energy booster station comprises a main transformer 1, a fully insulated tubular bus 2, a #135kV main transformer incoming cabinet 3, a #235kV main transformer incoming cabinet 4, a PT cabinet 5, a main transformer neutral point complete set 6, a 35kV I-section bus 7 and a 35kV II-section bus 8;
the low-voltage side of the main transformer 1 is connected with the input end of a #135kV main transformer incoming line cabinet 3, the input end of a #235kV main transformer incoming line cabinet 4 and a PT cabinet 5 through a fully insulated tubular bus 2, the output end of the #135kV main transformer incoming line cabinet 3 is connected with a 35kV I section bus 7, the output end of the #235kV main transformer incoming line cabinet 4 is connected with a 35kV II section bus 8, and a main transformer neutral point complete device 6 is connected with the main transformer 1.
Both the #135kV main transformer inlet cabinet 3 and the #235kV main transformer inlet cabinet 4 comprise vacuum circuit breakers, wherein one ends of the vacuum circuit breakers are connected with the all-insulation tubular bus 2, a current transformer and a first charged display are arranged on a lead between the vacuum circuit breaker and the all-insulation tubular bus 2, the other end of the vacuum circuit breaker in the #135kV main transformer inlet cabinet 3 is connected with the 35kV I section bus 7, and the other end of the vacuum circuit breaker in the #235kV main transformer inlet cabinet 4 is connected with the 35kV II section bus 8.
And a first lightning arrester is connected on a wire between the fully-insulated tubular bus 2 and the main transformer 1.
The PT cabinet 5 comprises a fuse, a voltage transformer and a harmonic elimination device, wherein the fully-insulated tubular bus 2 is grounded through the fuse, the voltage transformer and the harmonic elimination device, and a second electrified display, a third electrified display and a second lightning arrester are connected to a line between the fuse and the fully-insulated tubular bus 2.
The main transformer neutral point complete device 6 comprises a neutral point isolating switch, a third lightning arrester, a discharging gap and a gap current transformer, wherein the main transformer 1 is grounded after passing through the discharging gap and the gap current transformer, one end of the neutral point isolating switch and one end of the third lightning arrester are both connected with a circuit between the main transformer 1 and the discharging gap, and the other end of the neutral point isolating switch and the other end of the third lightning arrester are both grounded.
It should be noted that, in order to expand the grid-connected new energy system of unit wiring, because the voltage of each section of 35kV bus is supported by the system through the same main transformer 1, the secondary voltages of metering, measuring and protection levels required by each loop measurement and control protection device, metering device and main transformer protection and control device on each section of 35kV bus can be directly collected from the low-voltage side of the main transformer 1, the utility model optimizes and reduces the number of secondary voltage collection points in the conventional scheme to 1, and the secondary voltage collection points are arranged on the low-voltage side of the main transformer 1, and the 35kV system only needs to be configured with 1 PT cabinet 5, thereby saving investment, reducing the complexity of the system and improving the stability of the system.
Claims (9)
1. A secondary voltage acquisition system at the low-voltage side of a main transformer of a new energy booster station is characterized by comprising a main transformer (1), a fully insulated tubular bus (2), a #135kV main transformer inlet cabinet (3), a #235kV main transformer inlet cabinet (4), a PT cabinet (5), a 35kV I section bus (7) and a 35kV II section bus (8);
the low-voltage side of the main transformer (1) is connected with the input end of a #135kV main transformer incoming line cabinet (3), the input end of a #235kV main transformer incoming line cabinet (4) and a PT cabinet (5) through a fully insulated tubular bus (2), the output end of the #135kV main transformer incoming line cabinet (3) is connected with a 35kV I section bus (7), and the output end of the #235kV main transformer incoming line cabinet (4) is connected with a 35kV II section bus (8).
2. The system for acquiring the secondary voltage at the main transformer low-voltage side of the new energy booster station according to claim 1, characterized by comprising a main transformer neutral point set device (6), wherein the main transformer neutral point set device (6) is connected with the main transformer (1).
3. The system for acquiring the secondary voltage at the low-voltage side of the main transformer of the new energy booster station as claimed in claim 1, wherein the #135kV main transformer incoming cabinet (3) and the #235kV main transformer incoming cabinet (4) each comprise a vacuum circuit breaker, wherein one end of the vacuum circuit breaker is connected with the fully insulated tubular bus (2), the other end of the vacuum circuit breaker in the #135kV main transformer incoming cabinet (3) is connected with the 35kV section I bus (7), and the other end of the vacuum circuit breaker in the #235kV main transformer incoming cabinet (4) is connected with the 35kV section II bus (8).
4. The system for acquiring the secondary voltage at the low-voltage side of the main transformer of the new energy booster station as claimed in claim 3, wherein a current transformer and a first live display are arranged on a lead between the vacuum circuit breaker and the fully insulated tubular bus (2).
5. The system for acquiring the secondary voltage at the low-voltage side of the main transformer of the new energy booster station as claimed in claim 4, wherein a first lightning arrester is connected to a wire between the fully insulated tubular bus (2) and the main transformer (1).
6. The system for acquiring the secondary voltage at the low-voltage side of the main transformer of the new energy booster station as claimed in claim 5, wherein the PT cabinet (5) comprises a fuse, a voltage transformer and a harmonic elimination device, and wherein the fully insulated tubular bus (2) is grounded through the fuse, the voltage transformer and the harmonic elimination device.
7. The system for acquiring the secondary voltage at the low-voltage side of the main transformer of the new energy booster station as claimed in claim 6, wherein a second live display, a third live display and a second lightning arrester are connected to a line between the fuse and the fully insulated tubular bus (2).
8. The system for acquiring the secondary voltage at the low-voltage side of the main transformer of the new energy booster station as claimed in claim 2, wherein the main transformer neutral point complete set (6) comprises a discharge gap and a gap current transformer, and wherein the main transformer (1) is grounded through the discharge gap and the gap current transformer.
9. The system for acquiring the secondary voltage at the low-voltage side of the main transformer of the new energy booster station as claimed in claim 8, further comprising a neutral point isolation switch and a third lightning arrester; one end of the neutral point isolating switch and one end of the third lightning arrester are both connected with a line between the main transformer (1) and the discharge gap, and the other end of the neutral point isolating switch and the other end of the third lightning arrester are both grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123073576.5U CN216390531U (en) | 2021-12-08 | 2021-12-08 | New forms of energy booster station owner becomes low pressure side secondary voltage collection system |
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| CN202123073576.5U CN216390531U (en) | 2021-12-08 | 2021-12-08 | New forms of energy booster station owner becomes low pressure side secondary voltage collection system |
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| CN216390531U true CN216390531U (en) | 2022-04-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114050604A (en) * | 2021-12-08 | 2022-02-15 | 中国华能集团清洁能源技术研究院有限公司 | New forms of energy booster station owner becomes low pressure side secondary voltage collection system |
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2021
- 2021-12-08 CN CN202123073576.5U patent/CN216390531U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114050604A (en) * | 2021-12-08 | 2022-02-15 | 中国华能集团清洁能源技术研究院有限公司 | New forms of energy booster station owner becomes low pressure side secondary voltage collection system |
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