Novel airport ground power supply system

Abstract

A novel airport ground power supply system of the present invention comprises an intermediate frequency power supply device, a combined terminal device, a guarantee platform and an intelligent monitoring system, a commercial power grid is connected with the input end of the intermediate frequency power supply device, the intermediate frequency power supply device comprises a plurality of power supply output ends, and each power supply output end is connected with a loop intermediate frequency medium voltage cable. Each loop medium-frequency medium-voltage cable is connected with the input end of a combined terminal device, each combined terminal device comprises three output ends, and the three output ends correspond to a guarantee platform and a machine position; and the intermediate frequency power supply equipment is used for boosting and converting a mains supply three-phase 380V / 50Hz power supply. The medium-frequency power supply equipment which is configured in a centralized manner is adopted, and through the 1000V / 400Hz power distribution network, the line loss and the voltage drop are reduced, and long-distance and high-capacity power transmission is realized. Three kinds of voltage such as 200V / 400Hz alternating current, 300V high-voltage direct current and 28V low-voltage direct current are exemplarily provided through the combined terminal equipment, and alternating current-direct current power supply integration is achieved.

Description

Technical Field

[0001] The present invention relates to the field of airport ground power supply guarantee, and particularly relates to a new type of airport ground power supply system. Background Art

[0002] Airport ground power is a power supply device that supplies power to an aircraft when it is on the ground, abbreviated as ground power or external power. It usually consists of two types: ground power vehicles and ground power facilities. Through power equipment or power vehicles specially set on the ground (such as apron, hangar, etc.), it converts commercial power into AC or DC power of the required specifications for guaranteeing during the aircraft's ground parking period.

[0003] At present, among the airport ground power supplies in China, except that the power demand specifications of various large passenger aircraft are relatively unified, there are still a large number of other types of aircraft with different power demand capacities and specifications. The existing major airports adopt a guarantee method mainly based on decentralized ground power facilities and supplemented by power vehicle charging. In actual guarantee work, there are problems such as single guarantee equipment and vehicles, fixed specifications, and low efficiency; at the same time, due to the long distance between the aircraft parking position and the commercial power interface position, and because commercial power cannot be transmitted over long distances, it is impossible to obtain a stable power demand voltage after directly transmitting commercial power and then performing the required voltage conversion; therefore, there is an urgent need for a power supply system that can provide multiple specifications of power and can supply power stably over long distances. Summary of the Invention

[0004] The purpose of the present invention is to provide a new type of airport ground power supply system to solve the above technical problems.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A new type of airport ground power supply system includes an intermediate frequency power equipment, a combined terminal equipment, a guarantee platform, an intelligent monitoring system, and intermediate frequency medium voltage cables. The commercial power grid is connected to the input end of the intermediate frequency power equipment. The intermediate frequency power equipment includes multiple power output ends, and each power output end is connected to a loop of intermediate frequency medium voltage cable. Each loop of intermediate frequency medium voltage cable is respectively connected to the input end of a combined terminal equipment. Each combined terminal equipment includes three output ends, and these three output ends correspond to a guarantee platform and an aircraft position.

[0007] Optionally, the intermediate frequency power equipment includes a dynamic power unit and a parallel operation and power distribution unit. The dynamic power unit boosts the three-phase 380V / 50Hz power into a first high-voltage power through a motor-generator combination.

[0008] Optionally, the dynamic power unit introduces a three-phase 380V / 50Hz power supply from the airport power supply and distribution system, drives the motor to rotate, and outputs mechanical torque. The motor and the generator are coaxially installed, so that the mechanical torque output by the motor drives the generator to rotate, and the electric energy of the first high-voltage power supply is output; an exciter is installed on the main drive shaft to adjust the voltage of the output first high-voltage power supply.

[0009] Optionally, the output terminal voltage of the generator is adjusted by controlling the output of the exciter, and the excitation regulation adopts a closed-loop form.

[0010] Optionally, the intelligent monitoring system adjusts the output terminal voltage of the dynamic power unit in real time according to the actual output at the load end.

[0011] Optionally, the parallel connection and power distribution unit distributes the output electric energy to each combined terminal device through the medium-frequency medium-voltage cable, and realizes the protection of each circuit through the protection switches of each circuit in the parallel connection and power distribution unit.

[0012] Optionally, the medium-frequency medium-voltage cable is a multi-core special medium-frequency cable, which includes a conductor, an insulating material, a filling material, a tape, an inner sheath, a galvanized steel tape armor, a wrapping tape, a low-smoke and halogen-free outer sheath, a nylon protective layer and a middle joint.

[0013] Optionally, the combined terminal device includes a first DC component unit device, a basic unit device, and a second DC component unit device; the basic unit device steps down the electric energy of the first high-voltage power supply into three-phase 200V / 400Hz power supplies through three windings, which are used to supply power to the first DC component unit device, the second DC component unit device and the protection platform respectively.

[0014] Optionally, the basic unit device adopts an automatic voltage regulating transformer and is designed with low no-load loss. The first DC component unit device and the second DC component unit device include metal-insulated gate field effect transistor rectification, synchronous Buck bucking and LC filtering. After rectification, the 200V / 400Hz alternating current is converted into direct current with a 2.4kHz ripple, and then passes through Buck bucking and LC filtering to filter into a relatively flat corresponding DC voltage output.

[0015] Optionally, the guarantee platform is a liftable guarantee platform installed beside the aircraft position. As the end - energy - bearing platform of the combined terminal equipment, it is used to transmit each power output by the combined terminal equipment to the aircraft. The output of the first DC component unit device is the first DC electric energy, and the output of the second DC component unit device is the second DC electric energy. The first DC electric energy and the second DC electric energy can be the same or different. Specifically, when parking large aircraft, due to site limitations, usually one power supply platform can only guarantee one aircraft. Therefore, according to the requirements of the large aircraft, the corresponding DC electric energy is selected for power supply. When parking small aircraft, one power supply platform can sometimes guarantee two small aircraft. When the models of the two small aircraft are the same, the first DC electric energy and the second DC electric energy can be made the same for power supply. When the models of the two small aircraft are different, the first DC electric energy and the second DC electric energy can be made different, and power supply is carried out according to the actual power demand of the two small aircraft.

[0016] Optionally, the intelligent monitoring system includes a monitoring platform, communication cables, and various equipment control and communication components. The monitoring system conducts real - time online monitoring of the working process of the airport ground power supply system, gives a quick response to changes in the working conditions, and promptly conducts collection, alarm, and adjustment, and has self - reset in case of danger.

[0017] Optionally, the output of the first high - voltage power supply is electric energy of three - phase 1000V / 400Hz

[0018] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0019] 1. Integrated power - on guarantee ability. The intermediate - frequency power supply equipment is centrally installed. This installation method will greatly reduce the total configuration of the intermediate - frequency power supply, which is more conducive to the centralized and effective management and maintenance of the intermediate - frequency power supply equipment, making it possible to use dynamic power supplies to replace static inverters. Since the usage of static inverters is greatly reduced, the probability of power harmonics generated by electronic equipment polluting the power - frequency power supply system is also greatly reduced. The new power - on system with centralized configuration will have more flexible adaptability, stronger overload anti - interference ability, longer guarantee distance, and longer service life.

[0020] 2. Power - on guarantee ability for multiple aircraft types. The system regards the compatibility principle as an important goal. After the bottleneck of the power supply capacity is solved by medium - voltage transmission, the realization of compatibility mainly depends on the flexible combination modules and configuration types of the end - equipment. The basic unit equipment and component unit equipment of the medium - voltage intermediate - frequency power supply have unified standards and unified interfaces to achieve flexible combination and rapid replacement.

[0021] 3. The number of aircraft covered increases. By using one medium-frequency power supply device, multiple support platforms can be correspondingly served. The support platforms are designed in parallel and interfere with each other complementarily, enabling one medium-frequency power supply device to supply power to multiple aircraft of different models simultaneously. Compared with the existing technology, more aircraft can be covered and the support capacity is stronger. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not limit the embodiments of the present invention. In the drawings:

[0023] Figure 1 is the overall structural block diagram of the ground power supply system according to the present invention;

[0024] Figure 2 is the basic working principle diagram of the medium-frequency power supply device according to the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the embodiments and the drawings. The illustrative embodiments and descriptions thereof of the present invention are only used to explain the present invention and do not limit the present invention.

[0026] As Figure 1-2 shown, this embodiment provides a new type of airport ground power supply system, including a medium-frequency power supply device 2, a combined terminal device 5, a support platform 6, and an intelligent monitoring system 3. The commercial power grid 1 is connected to the input end of the medium-frequency power supply device 2. The medium-frequency power supply device 2 includes multiple power output ends, and each output end is connected to a loop of medium-frequency medium-voltage cable 4. Each loop of medium-frequency medium-voltage cable 4 is respectively connected to the input end of a combined terminal device 5. Each combined terminal device 5 includes three output ends, and these three output ends correspond to a support platform 6 and a parking position 7. The voltage of the commercial power grid 1 is 380 / 50Hz and is used to supply power to the airport ground power supply system.

[0027] The medium-frequency power supply device 2 includes a dynamic power supply unit 21 and a parallel operation and power distribution unit 22. The dynamic power supply unit 21 converts the three-phase 380V / 50Hz power supply into electrical energy of the first high-voltage power supply through the combination of "motor - generator". Specifically, the dynamic power supply unit 21 introduces the three-phase 380V / 50Hz power supply from the airport power supply and distribution system, drives the motor to rotate. The motor rotates with the electrical energy of 380V / 50HZ as the power and outputs mechanical torque. The motor and the generator are coaxially installed, so that the mechanical torque output by the motor drives the generator to rotate, converting mechanical energy into medium-frequency electrical energy, and thus outputting three-phase 1000V / 400Hz electrical energy. When designing the motor, it is ensured that the change in speed from full load to no load is within a reasonable range to ensure stable output frequency; at the same time, an exciter is installed on the main drive shaft to adjust the output voltage under heavy load conditions, that is, the output terminal voltage of the generator can be adjusted by controlling the output of the exciter, such as 1100V / 400Hz, etc., which is not specifically limited here. In addition, the medium-frequency power supply device 2 also includes a local display and control platform, which is used to monitor the operation status of the medium-frequency power supply in real time and give an alarm in time, and can also receive instructions to adjust the excitation or perform operations such as shutdown; the excitation adjustment adopts a closed-loop form, and the adjustment amount of the port voltage is set through the intelligent monitoring system 3 for overall debugging. Further, the parallel operation and power distribution unit 22 can realize the parallel operation output of two generator sets and can operate with two loads; the parallel operation and power distribution unit 22 distributes the output three-phase 1000V / 400Hz electrical energy to each combined terminal device 5 through the medium-frequency medium-voltage cable 4, and realizes the protection of each circuit through the protection switches of each circuit in the parallel operation and power distribution unit.

[0028] The medium-frequency medium-voltage cable 4 is used to realize the long-distance transmission of the electrical energy of the converted first high-voltage power supply. In order to reduce the skin effect of the medium-frequency line, a multi-core special medium-frequency cable is selected. The multi-core special medium-frequency cable includes a conductor, an insulating material, a filling material, a tape, an inner sheath, a galvanized steel tape armor, a wrapping tape, a low-smoke and halogen-free outer sheath, a nylon protective layer, and a middle joint.

[0029] The combined terminal device 5 includes a first DC component unit device 51, a basic unit device 52, and a second DC component unit device 53. The output of the first DC component unit device 51 is the first DC electrical energy, and the output of the second DC component unit device 53 is the second DC electrical energy. Exemplarily, the output of the first DC component unit device 51 is 28V DC electrical energy, and the second DC component unit device 53 outputs DC electrical energy of other voltage levels required by the aircraft; generally, the electrical interface of a common civil aviation airliner is 28V DC power, but sometimes there are some special operation aircraft parked at the airport. Considering the operation objectives or on-board equipment of these aircraft, DC electrical energy of other voltage levels different from 28V DC power, such as 70V, 300V, etc., may be used. With the ground power supply system of the present application, the electrical power requirements of such special operation aircraft can also be considered, for example but not limited to this. Therefore, the basic unit device 52 steps down the three-phase 1000V / 400Hz electrical energy to three three-phase 200V / 400Hz power supplies through three windings for supplying power to the first DC component unit device 51, the second DC component unit device 53, and the support platform 6 respectively. The basic unit device 52 uses an automatic voltage regulating transformer and is designed with low no-load loss. To further reduce the no-load loss, the first and second DC component unit devices include metal-insulated gate field-effect transistor rectification, synchronous Buck bucking, and LC filtering. After rectification, the 200V / 400Hz alternating current is converted into direct current with a 2.4kHz ripple, and then through Buck bucking and LC filtering, it is filtered into a relatively flat corresponding DC voltage output.

[0030] The support platform 6 is a lift-type support platform 6 set beside the aircraft position 7 and serves as the end energy bearing platform of the combined terminal device 5. Exemplarily, the three-phase 200V / 400Hz power supply, 28V DC power supply, and 300V DC power supply output by the combined terminal device 5 are transmitted to the aircraft.

[0031] The intelligent monitoring system 3 includes a monitoring platform, communication cables, and various device control and communication components. The monitoring system monitors the working process of the airport ground power supply system in real time and online, gives a quick response to changes in the working conditions, timely collects, alarms, and makes necessary adjustments, and automatically resets in case of danger to ensure the normal operation of the system and complete various tasks.

[0032] The working process of the airport ground power supply system of the present invention is briefly described below by way of example:

[0033] The medium-frequency power supply device 2 converts the airport three-phase 380V / 50Hz grid power into three-phase 1000V / 400Hz electrical energy. The medium-frequency medium-voltage cable 4 transports this three-phase 1000V / 400Hz electrical energy over a long distance to the combined terminal device 5 near each aircraft. The combined terminal device 5 converts the three-phase 1000V / 400Hz electrical energy into three-phase 200V / 200Hz power supply, 28V DC power supply, and 300V DC power supply for aircraft power-on use and transmits them to the support platform 6 to uniformly power on the aircraft. The intelligent monitoring system 3 is used to collect the operation status information of the above-mentioned functional parts of the power supply system in real time, monitor and record the operation data of each functional part, quickly respond to the changes in the working state of the power supply system, and ensure the normal operation of the system.

[0034] Compared with the prior art, the present invention adopts a centrally configured medium-frequency power supply device 2 and reduces the line loss and voltage drop through a distribution network of over 1000V / 400Hz, realizing long-distance and large-capacity power transmission. The combined terminal device 5 adopts a technical form of a fixed installation device plus a replaceable component unit. And through the support platform 6, three kinds of voltages such as 200V / 400Hz alternating current, 300V high-voltage direct current, and 28V low-voltage direct current are exemplarily provided at the end of the aircraft, which not only realizes the integration of AC-DC power supply, but also overcomes the disadvantages of high operating cost and low utilization rate caused by the single power supply mode of the traditional "one machine, one power source", and realizes the power-on guarantee ability of integration and multiple aircraft types.

[0035] The above-mentioned specific implementation manners further elaborate on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above are only the specific implementation manners of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A new type of airport ground power supply system, comprising an intermediate frequency power supply device (2), a combined terminal device (5), a support platform (6), an intelligent monitoring system (3), and an intermediate frequency medium-voltage cable (4). The municipal power grid (1) is connected to the input end of the intermediate frequency power supply device (2). The intermediate frequency power supply device (2) includes multiple power output terminals, and each power output terminal is connected to a loop of the intermediate frequency medium-voltage cable (4). Each loop of the intermediate frequency medium-voltage cable (4) is respectively connected to the input end of a combined terminal device (5). Each combined terminal device (5) includes three output terminals, and these three output terminals correspond to a support platform (6) and an aircraft position (7).

2. The novel airport ground power supply system according to claim 1, characterized in that: The intermediate frequency power supply device (2) includes a dynamic power unit (21) and a parallel operation and power distribution unit (22). The dynamic power unit (21) boosts and converts the three-phase 380V / 50Hz power supply into a first high-voltage power supply through a motor-generator combination.

3. A novel airport ground power supply system according to claim 2, characterized in that: The dynamic power unit (21) introduces the three-phase 380V / 50Hz power supply from the airport power supply and distribution system, drives the motor to rotate, and outputs mechanical torque. The motor and the generator are coaxially installed, so that the mechanical torque output by the motor drives the generator to rotate and outputs the electric energy of the first high-voltage power supply. An exciter is installed on the main transmission shaft to adjust the output voltage of the first high-voltage power supply.

4. A novel airport ground power supply system according to claim 3, characterized in that: The output voltage of the generator is adjusted by controlling the output of the exciter, and the excitation regulation adopts a closed-loop form.

5. A novel airport ground power supply system according to claim 4, characterized in that: The intelligent monitoring system (3) adjusts the output voltage of the dynamic power unit (21) in real time according to the actual output at the load end.

6. A novel airport ground power supply system according to claim 2, characterized in that: The parallel operation and power distribution unit (22) distributes the output electric energy to each combined terminal device (5) through the intermediate frequency medium-voltage cable (4), and realizes the protection of each loop through the protection switches of each loop in the parallel operation and power distribution unit.

7. A novel airport ground power supply system according to claim 1, characterized in that: The intermediate frequency medium-voltage cable (4) is a multi-core special intermediate frequency cable, which includes a conductor, an insulating material, a filling material, a tape, an inner sheath, a galvanized steel tape armor, a wrapping tape, a low-smoke and halogen-free outer sheath, a nylon protective layer, and a middle joint.

8. A novel airport ground power supply system according to claim 1, characterized in that: The combined terminal device (5) includes a first DC component unit device (51), a basic unit device (52), and a second DC component unit device (53). The basic unit device (52) steps down the electric energy of the first high-voltage power supply into three-phase 200V / 400Hz power supplies through three windings for supplying power to the first DC component unit device (51), the second DC component unit device (53), and the support platform (6) respectively.

9. A novel airport ground power supply system according to claim 1, characterized in that: The basic unit device (52) adopts an automatic voltage regulating transformer and is designed with low no-load loss. The first DC component unit device (51) and the second DC component unit device (53) include metal-insulated gate field-effect tube rectification, synchronous Buck bucking, and LC filtering. After rectification, the 200V / 400Hz alternating current is converted into direct current with a 2.4kHz ripple, and then through Buck bucking and LC filtering, it is filtered into a relatively flat corresponding DC voltage output.

10. A novel airport ground power supply system according to claim 8, characterized in that: The guarantee platform (6) is a lift-type guarantee platform (6) arranged beside the aircraft position (7), serving as the end energy-bearing platform of the combined terminal device (5) and used to transmit each power supply output by the combined terminal device (5) to the aircraft; the output of the first DC component unit device (51) is the first DC electric energy, and the output of the second DC component unit device (53) is the second DC electric energy; the first DC electric energy and the second DC electric energy are the same or different.

11. A novel airport ground power supply system according to claim 1, characterized in that: The intelligent monitoring system (3) includes a monitoring platform, communication cables, and various device control and communication components. The monitoring system conducts real-time online monitoring on the working process of the airport ground power supply system, gives a quick response to changes in the working conditions, and timely conducts collection, alarm, and adjustment, and self-resets in case of danger.

12. A novel airport ground power supply system according to claim 10, characterized in that: The output of the first high-voltage power supply is electric energy of three-phase 1000V / 400Hz.

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