阅读说明：本技术 三供电制式轮齿轨列车供电转换电路、轨道交通系统及方法 (Three-power-supply-system wheel-rack train power supply conversion circuit, rail transit system and method ) 是由 赵西蓉 翟婉明 钱振地 张跃辰 肖大庆 毕小毛 许生伟 蔡成标 王远波 陆可 陈 于 2021-08-25 设计创作，主要内容包括：本发明涉及三供电制式轮齿轨列车供电转换电路、轨道交通系统及方法,通过列车高压电路从接触网接收AC25kV或DC3000V的供电,将供电进行分配和转换后直接用于牵引系统运行,同时给蓄电池储电,当蓄电池电能充足时可以在没有高压电的情况下给列车牵引系统提供低速运行的电能。在列车有高压供电的情况下通过高压供电使列车运行,在列车没有高压供电的情况下通过DC110V供电使列车运行。本发明满足了轮齿轨列车在不同线路情况下的运行需要,无需供电系统统一供电制式,利于减少线路供电改造的成本,降低供电系统建设的时间。(The invention relates to a three-power-supply system gear-and-rail train power supply conversion circuit, a rail transit system and a method, wherein a train high-voltage circuit receives power supply of AC25kV or DC3000V from a contact network, the power supply is distributed and converted and then directly used for running of a traction system, meanwhile, the power is stored in a storage battery, and when the electric energy of the storage battery is sufficient, the low-speed running electric energy can be provided for the train traction system under the condition of no high voltage electricity. The train is operated by high voltage power supply in the case of a high voltage power supply to the train and by DC110V power supply in the case of a no high voltage power supply to the train. The invention meets the operation requirements of the train with the gear and the rail under different line conditions, does not need a uniform power supply system of a power supply system, is beneficial to reducing the cost of line power supply transformation and reducing the time of power supply system construction.)

1. Three power supply system gear rack train power supply converting circuit, its characterized in that: the method comprises the following steps:

the pantograph is used for receiving electric energy on a contact net;

the mutual inductor box is connected with the pantograph, the first circuit breaker and the second circuit breaker and used for detecting the voltage and the current of the electric energy obtained on the contact network and controlling the opening and closing of the first circuit breaker and the second circuit breaker according to the detection result;

the first circuit breaker is connected with the pantograph and the transformer and used for connecting or disconnecting electric energy between the pantograph and the transformer box;

the second circuit breaker is connected with the pantograph and the traction and auxiliary converter box and is used for connecting or disconnecting electric energy between the pantograph and the traction and auxiliary converter box;

the transformer box is connected with the traction and auxiliary converter box and is used for converting the power supply voltage of the first power supply system received by the pantograph into the power supply voltage of the second power supply system receivable by the traction and auxiliary converter box;

the traction and auxiliary converter box is connected with the charger and the traction motor and used for supplying power to the charger and the traction motor;

the charger is connected with the storage battery and charges the storage battery by converting the electric energy obtained from the traction and auxiliary converter box into a supply voltage of a third power supply system which can be received by the storage battery;

and the storage battery is connected with the traction and auxiliary converter box and is used for providing power supply of a third power supply system.

2. The power supply conversion circuit of a three-power-supply-system gear rack train according to claim 1, characterized in that: also included is an RFID receiver connecting the first circuit breaker and the second circuit breaker.

3. The power supply conversion circuit of a three-power-supply-system wheel rack train according to claim 1 or 2, characterized in that: the first power supply system is AC25kV, the second power supply system is DC3000V, and the third power supply system is DC 110V.

4. The conversion method of the power supply conversion circuit of the three-power-supply-system gear rack train as claimed in claims 1 to 3, characterized in that:

when a train with the gear and the rail acquires AC25kV electric energy from a contact network through a pantograph, when the voltage of AC25kV is detected through a transformer box, a first circuit breaker is controlled to be closed, the electric energy enters a traction and auxiliary converter box after being transformed through a high-voltage transformer box, and a traction motor is driven to work after the traction and auxiliary converter box transforms the current and the voltage, so that the train runs; the traction and auxiliary converter box supplies power to the charger after current and voltage transformation, and the charger charges the storage battery after current and voltage transformation;

when the train with the gear and the rail enters a non-electric area and no voltage on a contact network is detected, the train supplies power to the traction and auxiliary converter box through the storage battery, and the traction and auxiliary converter box drives a traction motor to work after inversion so as to enable the train to run;

when the train with the gear and the rail acquires DC3000V electric energy from a contact network through a pantograph, and the transformer box detects the voltage of DC3000V, the second circuit breaker is controlled to be closed, and the electric energy is converted and transformed through the traction and auxiliary converter boxes to drive the traction motor to work so as to enable the train to run; and the traction and auxiliary converter box supplies power to the charger after current and voltage transformation, and the charger charges the storage battery after current and voltage transformation.

5. Three power supply standard mountain region tourism rail transit systems, its characterized in that: the train comprises a train of cogged rails, wherein the train comprises the three-power-supply-system train power supply conversion circuit of the train as claimed in any one of claims 1 to 3.

6. The three-power-supply-system mountain land travel rail transit system according to claim 5, characterized in that: the wheel tooth rail train is a horizontal wheel tooth rail train.

7. The three-power-supply-system mountain land travel rail transit system according to claim 5, characterized in that: the RFID tag further comprises at least two contact networks in a first power supply system contact network, a non-electric contact network and a second power supply system contact network, and an RFID tag arranged on the ground.

8. The three-power-supply-system mountain land travel rail transit system according to claim 7, characterized in that: the first power supply system contact net is an AC25kV contact net, and the second power supply system contact net is a DC3000V contact net.

9. The three-power-supply-system mountain land travel rail transit system according to claim 7 or 8, characterized in that: the RFID label comprises an RFID label A arranged in a first power supply system contact network area and an RFID label B arranged in a second power supply system contact network area;

the RFID tag A comprises the first power supply system contact network line information and the front line information;

and the RFID label B comprises the second power supply system contact network line information and the front line information.

10. The power supply conversion method of the three-power-supply-system mountain tourism rail transit system as claimed in any one of claims 5 to 9, characterized in that: the AC25kV contact net, the electroless contact net and the DC3000V contact net are arranged along the track line in sequence;

when the train starts to operate from an AC25kV power supply area, the train gets power from an AC25kV overhead contact system through a pantograph and drives the train to operate;

when the train with the wheel and the rail runs to the position of the RFID tag A, the vehicle-mounted RFID receiver receives information of the RFID tag A and knows that the train is about to enter a non-electric area in front of the train, the RFID receiver sends a disconnection instruction to the first circuit breaker at the moment, so that the train loses electricity before entering the non-electric contact net area, after the train loses high-voltage electricity, the train supplies power to the traction and auxiliary converter box through the storage battery, and the traction and auxiliary converter box drives the traction motor to work after inversion so that the train continues to run;

when the train with the gear and the rail runs to a DC3000V contact network area and runs to the position of the RFID label B, the vehicle-mounted RFID receiver receives information of the RFID label B and knows that the train with the gear and the rail enters a DC3000V power supply area, the transformer box also detects that the voltage of a contact network is DC3000V at the moment, the second circuit breaker of the train is closed after receiving a control instruction of the transformer box, the train gets power from the DC3000V contact network, and electric energy is converted and transformed by the traction and auxiliary converter boxes to drive the traction motor to work so that the train continues to run.

Technical Field

The invention relates to the technical field of rail transit, in particular to a three-power-supply-system gear-and-rail train power supply conversion circuit, a rail transit system and a rail transit method.

Background

At present, rail transit trains generally adopt a single power supply system to supply power, and the main power supply systems include: AC 3x380V, DC 750V, DC1500V, DC3000V and AC25 kV. When a plurality of power supply systems exist in a project and a train needs to run on a line of the plurality of power supply systems, the train with a single power supply system cannot meet the operation requirement. For example: the AC25kV power supply main line adopts a DC3000V power supply mode with a new line connected with the AC25kV power supply main line, but a train needs to run between two lines, the circuit design scheme of the existing single-system power supply train cannot meet the operation requirement, a power supply system or a power supply line of the original train needs to be modified to adapt to the operation requirement, and thus the modification cost and the time increase can be caused.

Disclosure of Invention

The application provides a three-power-supply-system wheel-rack train power supply conversion circuit, a rail transit system and a method for solving the technical problems.

The application is realized by the following technical scheme:

the power supply conversion circuit of the three power supply systems of the gear rack train receives power supply of the first power supply system or the second power supply system from a contact network through a train high-voltage circuit, distributes and converts the power supply and then directly uses the power supply for running of a traction system, simultaneously stores the power for the storage battery, and can provide low-speed running electric energy for the train traction system under the condition of no high voltage electricity when the electric energy of the storage battery is sufficient.

Further, the train is operated by supplying power to the AC25kV or the DC3000V under the condition that the train has high-voltage power supply, and the train is operated by supplying power to the DC110V under the condition that the train does not have high-voltage power supply, and finally, the circuit design of the cogged rail train meeting the three power supply standards is realized.

Compared with the prior art, the method has the following beneficial effects:

the gear and rail train with the three-power-supply-system gear and rail train power supply conversion circuit can run under three power supply systems, can be suitable for line conditions with the three power supply systems in one project, meets the running requirements of the gear and rail train under different line conditions, does not need a power supply system to unify the power supply systems, is beneficial to reducing the cost of line power supply transformation and reducing the time for building the power supply system;

2, the application provides a circuit structure of a cogged rail train which can operate under AC25kV, DC3000V and DC110V voltage standards, and the cogged rail train applying the circuit can meet the requirements of project operation aiming at different projects; the owner can select the power supply system of a certain section of line according to the planned actual situation, does not need to worry about the situation that the train with the gear and the rail cannot adapt to various power supply systems simultaneously, and can run at low speed for a short time in certain specified non-electricity areas, so that the reasonable distribution of power supply resources can be realized according to project requirements, the cost and the construction time of a power supply line are reduced, and the project adaptability of the rack system is stronger.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.

FIG. 1 is a schematic diagram of a three-power-supply-system wheel-rack train power supply conversion circuit;

fig. 2 is a schematic diagram of a three-power-supply-system mountain tourism rail transit system.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, 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. It is to be understood that the described embodiments are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict. It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

As shown in fig. 1, the three-power-supply system power supply conversion circuit of the wheel rack train disclosed by the invention comprises:

the pantograph 1 receives electric energy on a contact net;

the transformer box 2 is connected with the pantograph, the first circuit breaker and the second circuit breaker and used for detecting the voltage and/or current of the electric energy obtained on the contact network so as to control the opening and closing of the first circuit breaker and the second circuit breaker according to the detection result;

the first circuit breaker 3 is connected with the pantograph and the transformer and used for connecting or disconnecting electric energy between the pantograph and the transformer box;

the second circuit breaker 4 is connected with the pantograph and the traction and auxiliary converter box and is used for connecting or disconnecting the electric energy between the pantograph and the traction and auxiliary converter box;

the transformer box 5 is connected with the auxiliary converter box and used for converting the power supply voltage of the first power supply system received by the pantograph into the power supply voltage of the second power supply system which can be received by the traction and auxiliary converter boxes;

the RFID receiver 6: and receiving the information of the RFID label, and using the information to control the opening and closing of the first circuit breaker 3 or the second circuit breaker 4.

The traction and auxiliary converter box 7 is connected with the charger 9 and the traction motor 8 and used for supplying power to vehicle electrical equipment such as the charger 9 and the traction motor 8;

the charger 9 is connected with the storage battery 10, and the electric energy obtained by the traction and auxiliary converter box 7 is converted into the supply voltage of a third power supply system which can be received by the storage battery to charge the storage battery 10;

and the storage battery 10 is connected with the traction and auxiliary converter box 7 and is used for providing power supply of a third power supply system.

Applicable scenes of the three-power-supply system gear-and-rail train power supply conversion circuit include, but are not limited to, the following two scenes:

1. project for connecting main railway line and urban railway line: because the main line railway line adopts an AC25kV power supply system, the mountain tourism gear tooth rail railway line adopts DC3000V power supply, and the mountain tourism gear tooth rail train needs to operate between two lines, the train circuit is required to meet the requirement of a double power supply system;

2. items where a main railway line is directly connected to a particular line within an area (e.g., industrial parks, tourist attractions, etc.): since the main railway line adopts a power supply system of AC25kV, a specific line in a region adopts power supply of DC3000V, and certain sections of the specific line in the region do not have high-voltage power supply, when power supply is required to be supplied through DC110V of a storage battery, the power supply conversion circuit of the train set is required to meet the requirement of a three-power-supply system.

In both scenarios, the transformer tank 5 is a high voltage transformer tank that is used to convert the AC25kV voltage to a DC3000V voltage that the traction and auxiliary converter tanks can receive.

The working principle of the three-power-supply-system gear-and-rail train power supply conversion circuit is further described below with reference to specific application scenarios.

Application scenario 1: the project starts from connecting with the national railway, and the power supply at the national railway access section is as follows: AC25 kV; the power supply entering the train operation section of the current section is DC 3000V; there is one section changeover portion between the different power supply at joint track section both ends: no electrical section.

When the mountain gear-and-rail train runs to a rail connecting section with a state rail, AC25kV power supply is obtained from a contact network through a pantograph 1, when AC25kV electric energy is received, voltage and current are detected through a transformer box 2, when the voltage of AC25kV is detected, a first breaker 3 is controlled to be closed, the electric energy enters a traction and auxiliary converter box 7 after being transformed by a high-voltage transformer box 5, and a traction motor 8 is driven to work after the traction and auxiliary converter box 7 transforms current and voltage, so that the train runs; and the traction and auxiliary converter box 7 supplies power to the charger 9 after current and voltage transformation, and the charger 9 charges the storage battery 10 after current and voltage transformation.

When the mountain gear wheel and rail train enters a non-electric area and no voltage exists on a contact network, the train supplies power to the traction and auxiliary converter box 7 through the storage battery 10, and the traction and auxiliary converter box 7 drives the traction motor 8 to work after inversion so as to enable the train to run.

When the mountain cogged rail train enters a DC3000V power supply section, the train obtains DC3000V power supply from a contact network through a pantograph 1, when receiving DC3000V electric energy, voltage and current are detected through a transformer box 2, when detecting the voltage of DC3000V, a second circuit breaker 4 is controlled to be closed, and the electric energy is converted and transformed through a traction and auxiliary converter box 7 to drive a traction motor 8 to work so that the train runs. And the traction and auxiliary converter box 7 supplies power to the charger 9 after current and voltage transformation, and the charger 9 charges the storage battery 10 after current and voltage transformation.

Based on the three-power-supply-system wheel-rack-rail train power supply conversion circuit, the invention also discloses a three-power-supply-system mountain tourism rail traffic system. The three-power-supply-system mountain tourism rail transit system comprises a gear-tooth rail train, a first power-supply-system contact network, a non-electric contact network, a second power-supply-system contact network and a ground RFID tag. The gear-and-rail train comprises the gear-and-rail train power supply conversion circuit with the three power supply systems, the RFID tag comprises the contact net line information and the front line information of the section, and the information can be transmitted to the RFID receiver in a wireless induction mode.

For the application scenario 1, the gear-and-rail train is a horizontal gear-and-rail train comprising the three power supply system gear-and-rail train power supply conversion circuit; the first power supply system contact network is an AC25kV power supply system contact network, and the second power supply system contact network is a DC3000V power supply system contact network.

As shown in fig. 2, the non-electric overhead line system 13 is a non-electric power supply overhead line system, an RFID tag a15 is provided at the tail end of the line segment of the AC25kV overhead line system 12, and an RFID tag B16 is provided at the start end of the line segment of the DC3000V overhead line system 14.

RFID tag a 15: the wireless sensing system contains the AC25kV contact net line information and the front line information, and can transmit the information to the RFID receiver in a wireless sensing mode.

RFID tag B16: the wireless sensor network communication system comprises the DC3000V contact network line information and the front line information, and can transmit the information to the RFID receiver in a wireless induction mode.

Based on the application scenario 1, with reference to fig. 1 and fig. 2, the following further explains the working principle of the three-power-supply-system mountain tourism rail transit system, specifically as follows:

when the cogged rail train 11 starts to operate from the AC25kV power supply area, the cogged rail train 11 gets power from the AC25kV contact net 12 area through the pantograph 1 from the AC25kV contact net to drive the train to operate.

When the train with the cogged rail 11 runs to the RFID tag A15, the vehicle-mounted RFID receiver 6 receives information of the RFID tag A15 and knows that the train is about to enter a non-electric area in front, at the moment, the RFID receiver 6 sends a disconnection instruction to the first circuit breaker 3 to enable the train to lose electricity before entering the non-electric contact net 13 area, after the train loses high voltage electricity, the train supplies electricity to the traction and auxiliary converter box 7 through the storage battery 10, and the traction and auxiliary converter box 7 drives the traction motor 8 to work after inversion, so that the train continues to run.

When the cogged rail train 11 runs to the area of a DC3000V overhead line system 14 and runs to the position of an RFID tag B16, the vehicle-mounted RFID receiver 6 receives information of the RFID tag B16 and knows that the train enters the power supply range of DC3000V, at the moment, when the transformer box 2 detects that the voltage of the overhead line system is DC3000V, the second breaker 4 of the train receives a control instruction of the transformer box 2 to be closed, the train gets power from the DC3000V overhead line system, and electric energy is converted and transformed by the traction and auxiliary converter box 7 to drive the traction motor 8 to work so that the train continues to run.

The electric energy switching process in the embodiment is only one of electric energy switching in multiple line conditions, and for different line power supply conditions, the power supply switching mode can be executed according to the principle.

The train traction system receives power supply of AC25kV or DC3000V from a contact net through a train high-voltage circuit, distributes and converts the power supply, directly uses the power supply for the traction system to operate, stores the power for the storage battery, and can provide low-speed operation power for the train traction system under the condition of no high voltage electricity when the power of the storage battery is sufficient; the train is operated by high-voltage power supply under the condition that the train has high-voltage power supply, and the train is operated by DC110V power supply under the condition that the train does not have high-voltage power supply, so that the circuit design of the train with the gear teeth and the rail meeting the three power supply systems is finally realized.

The above embodiments are provided to explain the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.