CN217087514U

CN217087514U - Airport medium-voltage power supply system

Info

Publication number: CN217087514U
Application number: CN202123029989.3U
Authority: CN
Inventors: 赵旭光; 吴孟宸; 孟伟; 李亚秋; 田晓迪; 周雷; 孙墨祺; 刘志强
Original assignee: SHAANXI HUANGHE GROUP CO Ltd
Current assignee: SHAANXI HUANGHE GROUP CO Ltd
Priority date: 2021-12-03
Filing date: 2021-12-03
Publication date: 2022-07-29
Anticipated expiration: 2031-12-03

Abstract

The disclosed embodiment relates to an airport medium voltage power supply system, including: a power grid; the power supply is a medium-frequency static variable power supply, and the input end of the power supply is electrically connected with the output end of the power grid and is used for outputting the voltage output by the power grid to be preset medium voltage; and the step-down transformer is electrically connected with the output end of the power supply and used for converting preset medium voltage into rated voltage required by the tail end unit, and the output end of the step-down transformer is electrically connected with at least one tail end unit. In this embodiment, a medium-voltage power supply mode is adopted, and a system controls one medium-voltage power supply to supply power to a plurality of terminal units. The problems of short airport space and large field maintenance workload caused by a large number of power supplies of a traditional airport power supply system are solved; and secondly, under the condition of the same power, the medium-voltage transmission is adopted to reduce the current flowing through the medium-voltage transmission cable, so that the voltage drop of the medium-voltage transmission cable is reduced. The utility model discloses have apparent advantage in aspects such as power supply reliability, maintainability, power supply quality, system efficiency.

Description

Airport medium-voltage power supply system

Technical Field

The embodiment of the disclosure relates to the technical field of airport power supply equipment, in particular to an airport medium-voltage power supply system.

Background

The airport needs to provide 115V/400Hz three-phase alternating current power supply, namely airport power supply when the airplane is subjected to ground maintenance, inspection and airplane starting. The traditional airport power supply system adopts an independent power supply mode, namely, one machine position is provided with one power supply or two power supplies which are mutually backed up. When the traditional airport power supply system provides electric energy for a large or medium airport, the number of the airport power supply is increased sharply due to the huge number of the airport positions, and the airport power supply system is not beneficial to airport management and field maintenance while occupying the airport space. Secondly, the airport power supply belongs to high-power supply equipment, and the distance from the airport power supply to a ground well is relatively long. When the airport power supply transmits electric energy through the transmission cable, large current flows through the transmission cable, and the transmission cable has voltage drop, so that the load voltage of the airplane is reduced, and the power supply quality requirement of the airport airplane cannot be met.

Accordingly, there is a need to ameliorate one or more of the problems with the related art solutions described above.

It is noted that this section is intended to provide a background or context to the disclosure as recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.

SUMMERY OF THE UTILITY MODEL

It is an object of embodiments of the present disclosure to provide an airport medium voltage power supply system that overcomes, at least to some extent, one or more of the problems due to limitations and disadvantages of the related art.

The embodiment of the present disclosure provides an airport medium-voltage power supply system, including:

a power grid;

the power supply is a medium-frequency static-variable power supply, and the input end of the power supply is electrically connected with the output end of the power grid and is used for outputting the voltage output by the power grid to be a preset medium voltage;

the step-down transformer is electrically connected with the output end of the power supply and used for converting the preset medium voltage into rated voltage required by the tail end unit, and the output end of the step-down transformer is electrically connected with at least one tail end unit.

In an embodiment of the present disclosure, the medium frequency static variable power supply includes an ac motor, an exciter, and a medium voltage generator, which are connected to each other in pairs, and the ac motor is electrically connected to an output terminal of the power grid.

In an embodiment of the present disclosure, the step-down transformer is electrically connected to the output terminal of the power supply through a medium voltage power transmission cable.

In one embodiment of the present disclosure, a plurality of the terminal units are electrically connected to each other through a ring-shaped terminal power supply network.

In an embodiment of the present disclosure, the terminal unit includes a line compensation module and a machine position, the line compensation module is electrically connected to the machine position, the line compensation module is used for compensating a voltage drop of the medium voltage transmission cable, and the machine position provides a rated voltage for an aircraft.

In an embodiment of the present disclosure, the power grid provides a mains supply with a frequency of 50Hz and a phase voltage of 380V.

In an embodiment of the present disclosure, the input voltage of the power supply is 380V/50Hz, and the output preset medium voltage is 960V/400 Hz.

In one embodiment of the present disclosure, the rated voltage required by the end unit of the step-down transformer output is 115V/400 Hz.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

in the airport medium-voltage power supply system in the embodiment of the disclosure, a medium-voltage power supply mode is adopted, and the system can supply power to a plurality of tail end units by controlling one medium-voltage power supply. The problems of short airport space and large field maintenance workload caused by a large number of power supplies of a traditional airport power supply system are solved; and secondly, under the condition of the same power, the medium-voltage transmission is adopted to reduce the current flowing through the medium-voltage transmission cable, so that the voltage drop of the medium-voltage transmission cable is reduced. The utility model discloses have apparent advantage in aspects such as power supply reliability, maintainability, power supply quality, system efficiency.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.

Fig. 1 shows a schematic structural diagram of an airport medium voltage power supply system in an exemplary embodiment of the present disclosure;

fig. 2 shows a schematic configuration of a power supply in an exemplary embodiment of the present disclosure.

Reference numerals:

100. a power grid; 200. a power source; 201. an AC motor; 202. an exciter; 203. a medium voltage generator; 300. a step-down transformer; 400. a terminal unit; 401. a line compensation module; 402. a machine position; 500. a medium voltage power transmission cable; 600. a ring-ended power supply network.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Furthermore, the drawings are merely schematic illustrations of embodiments of the disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities.

The present example embodiment provides a medium voltage power supply system in an airport, which may include: a power grid 100, a power supply 200 and a step-down transformer 300. The power grid 100 supplies power to the power supply 200, the power supply 200 can be an intermediate frequency static variable power supply, and the input end of the power supply 200 is electrically connected with the output end of the power grid 100 and used for outputting the voltage output by the power grid 100 to be preset medium voltage. The step-down transformer 300 is electrically connected to an output terminal of the power supply 200, and is configured to convert the preset medium voltage into a rated voltage required by the terminal unit 400, and the output terminal of the step-down transformer 300 is electrically connected to at least one of the terminal units 400. In the system, alternating current is adopted for power transmission, and rectification is not needed.

In this embodiment, a medium voltage power supply mode is adopted, and a system can supply power to a plurality of end units 400 by controlling one medium voltage power supply 200. The problems of short airport space and large field maintenance workload caused by a large number of power supplies of a traditional airport power supply system are solved; and secondly, under the condition of the same power, the medium-voltage transmission is adopted to reduce the current flowing through the medium-voltage transmission cable, so that the voltage drop of the medium-voltage transmission cable is reduced. The utility model discloses have apparent advantage in aspects such as power supply reliability, maintainability, power supply quality, system efficiency.

Optionally, in some embodiments, the intermediate frequency static variable power supply 200 includes an ac motor 201, an exciter 202, and a medium voltage generator 203, which are connected to each other in pairs, and the ac motor 201 is electrically connected to the output terminal of the power grid 100. The ac motor 201 converts the electric energy supplied from the grid 100 into mechanical energy, the mechanical energy supplies power to the rotor when the medium voltage generator 203 generates electricity, the exciter 202 supplies exciting current to the medium voltage generator 203, so that the medium voltage generator 203 outputs a constant voltage, the medium voltage generator 203 performs electric energy conversion, converts the mechanical energy into electric energy, and outputs a power supply voltage of, for example, 960V/400Hz (the voltage value is not limited thereto, and may be a deviation of 20V from 960V, or the like).

Optionally, in some embodiments, the step-down transformer 300 is electrically connected to the output of the power supply 200 via a medium voltage power transmission cable 500. Since the step-down transformer 300 outputs a medium voltage of, for example, 960V/400Hz, power transmission using the medium voltage power transmission cable 500 is required.

Alternatively, in some embodiments, a plurality of the terminal units 400 are electrically connected to each other through the ring terminal power supply network 600.

Optionally, in some embodiments, the terminal unit 400 includes a line compensation module 401 and a station 402, the line compensation module 401 and the station 402 are electrically connected, the line compensation module 401 is configured to compensate for a voltage drop of the medium voltage power cable 500, and the station 402 provides a rated voltage for the aircraft. Because the medium voltage power cable 500 has a large current flowing through it, there is a power cable voltage drop, and the line compensation module 401 is used to compensate for the power cable voltage drop.

Optionally, in some embodiments, the power grid 100 provides mains power with a frequency of 50Hz and a phase voltage of 380V. Optionally, in some embodiments, the input voltage of the power supply 200 is 380V/50Hz, and the output preset medium voltage is 960V/400Hz, but the invention is not limited thereto.

Optionally, in some embodiments, the rated voltage required by the end unit 400 output by the step-down transformer 300 is 115V/400Hz, which is the rated voltage used by the aircraft. The voltage drop generated by the voltage output by the step-down transformer 300 through cable transmission is compensated by the line compensation module 401, so that the aircraft load voltage of the tail end unit 400 is ensured to be the rated voltage, and the electrical quality of the aircraft is met.

It should be noted that the medium pressure in the present invention refers to 500-.

It is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like in the foregoing description are used for indicating or indicating the orientation or positional relationship illustrated in the drawings, merely for the convenience of describing the disclosed embodiments and for simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and therefore should not be considered limiting of the disclosed embodiments.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present disclosure, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present disclosure, unless otherwise specifically stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In the embodiments of the present disclosure, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims

1. An airport medium voltage power supply system, comprising:

a power grid;

2. The airport medium voltage power supply system of claim 1 wherein said medium frequency static power supply comprises an ac motor, an exciter machine and a medium voltage generator interconnected in pairs, said ac motor being electrically connected to the output of said power grid.

3. The airport medium voltage power supply system of claim 1 wherein said step-down transformer is electrically connected to an output of said power source by a medium voltage power transmission cable.

4. The airport medium voltage power supply system of claim 1 wherein a plurality of said terminal units are electrically connected to each other by a ring terminal power supply network.

5. The airport medium voltage power supply system of claim 3 wherein said terminal unit includes a line compensation module and a stand, said line compensation module being electrically connected to said stand, said line compensation module being configured to compensate for voltage drops in said medium voltage power transmission cables, said stand providing a rated voltage for an aircraft.

6. The airport medium voltage power supply system of claim 1 wherein said electrical grid provides mains power at a frequency of 50Hz and a phase voltage of 380V.

7. The airport medium voltage power supply system of claim 6 wherein said power supply input voltage is 380V/50Hz and the output preset medium voltage is 960V/400 Hz.

8. The airport medium voltage power supply system of claim 7 wherein the required rated voltage of the terminal unit of the step-down transformer output is 115V/400 Hz.