CN202264646U - Power supply system with parallel fuse protectors on two sides of three-track current collection bogie - Google Patents

Abstract

The utility model discloses a power supply system with parallel fuse protectors on two sides of a three-track current collection bogie, which comprises a bus high speed breaker, a traction inverter, an auxiliary inverter and a power supply module. The power supply module is composed of two current collectors and the two fuse protectors. The two fuse protectors between the two current collectors are connected in series, wires between the two fuse protectors in series connection and the two current collectors are connected in parallel, the middle point between the two fuse protectors in series connection is an electrical connection point, the power supply module in a trailer with a driver chamber is connected with the bus high speed breaker in the trailer with the driver chamber, two power supply modules in a first bullet train car are connected in parallel between the bus high speed breaker and the traction inverter of the first bullet train car, and two power supply modules in a second bullet train car are connected in parallel between the bus high speed breaker of the first bullet train car and the traction inverter of the second bullet train car. The power supply system improves utilization ratio of the fuse protectors, reduces the number of the fuse protectors and improves reliability of movable connection between car bodies and the bogie.

Description

A parallel power supply system for fuses on both sides of a three-rail current-receiving bogie

technical field

The utility model relates to a main circuit control system of an urban rail vehicle, and mainly relates to a parallel fuse system on both sides of a third rail receiving bogie.

Background technique

The existing power supply system for the fuses on both sides of the third-rail current-receiving bogie is shown in Figure 1. There is a bus high-speed circuit breaker in the trailer with the driver's cab, the first motor car M1 and the second motor car M2, and three The bus high-speed circuit breaker is connected in series, the first motor car M1 and the second motor car M2 each have a traction inverter, the bus high-speed circuit breaker in the trailer with cab and the bus high-speed circuit breaker in the first motor car M1 There is a traction inverter connected in parallel between the first motor car M1 and the second motor car M2, and the traction inverter in the first motor car M1 is connected to the auxiliary inverter in the trailer with a driver's cab. There is a power supply module in the trailer. The power supply module is composed of two current receivers and four fuses. The four fuses are connected in series and connected in parallel between the two fuses. The first train M1 and the second train There are two power supply modules in the motor car M2, the midpoint between the series fuses of the power supply modules is the electrical connection access point, and the bus high-speed circuit breaker in the trailer with the driver’s cab is connected to the power supply module in the trailer with the driver’s cab , the two power supply modules in the first motor car M1 are connected in parallel between the busbar height circuit breaker and the traction inverter of the first motor car M1, and the two power supply modules in the second motor car M2 are connected in parallel to the first Between the bus height circuit breaker of the motor car M1 and the traction inverter of the second motor car M2.

At present, there is a fuse on both sides of the current receiving bogie on the third rail of the rail transit vehicle. One fuse operates when the train is going up, and the other fuse works when the train is going down. In the existing fuse system, the fuse is only responsible for the work of the upstream or downstream current receiver, the utilization rate of the fuse is only 50%, and the number of fuses is large and the utilization rate is low. In addition, since the transmission cable of the current receiver on one side needs to transmit the working current of the entire current receiver, the active connection cable from the current receiver to the car body has a larger diameter or is divided into two, which makes the active wiring space from the car body to the bogie It needs to be added a lot, especially when two cables are transmitted in parallel, the relative displacement of the bogie and the car body will easily cause the cables to rub against each other, which will bring safety hazards to the vehicle operation.

Contents of the invention

The technical problem to be solved by the utility model is to provide a parallel power supply system for the fuses on both sides of the receiver bogie of the urban rail vehicle, and to change the original rail transit vehicle to use a set of fuses for uplink and downlink. reduce the number of current collector fuses of existing rail transit vehicles, increase the utilization rate of fuses, increase the available space in the bogie area, reduce the movable connection cables between the bogie and the car body, and increase the number of bogie-to-car Reliability of physical activity connection.

In order to solve the above technical problems, the technical system adopted by the utility model is: including bus high-speed circuit breaker, traction inverter, auxiliary inverter, power supply module, the power supply module is composed of two current receivers and two fuses, The two fuses between the two current receivers are connected in series, the two series fuses are connected in parallel with the wire between the two current receivers, the midpoint between the two series fuses is the electrical connection access point, the trailer One power supply module in the trailer is connected to the bus high-speed circuit breaker in the trailer. The two power supply modules in the first motor car are connected in parallel between the bus high-speed circuit breaker and the traction inverter of the first motor car. The two power supply modules are connected in parallel between the bus high-speed circuit breaker of the first motor car and the traction inverter of the second motor car.

The utility model improves the utilization rate of the fuse, so that the original fuse with only 50% utilization rate can fully play its role; the number of fuses is reduced, and the space for two fuses needs to be arranged in the past, but now only one fuse is required. The layout space is enough; the active connection cables between the car body and the bogie are reduced, and the reliability of the active connection between the car body and the bogie is increased; only half of the fuses of the original system are used, which reduces the daily maintenance workload. The number of spare parts only needs half of the original system.

Description of drawings

Fig. 1 is a structural diagram of the parallel power supply system with fuses on both sides of the existing three-rail current-receiving bogie;

Fig. 2 is a structural diagram of the parallel power supply system of fuses on both sides of the three-rail current-receiving bogie of the utility model.

in:

TC: trailer with driver's cab; M1, M2: bullet train; BHB: bus high-speed circuit breaker; SIV: auxiliary inverter; VVVF: traction inverter; CCS: current receiver; F: fuse.

Detailed ways

The specific implementation manner of the present invention will be described in detail below in conjunction with accompanying drawing.

As shown in Figure 2, the parallel power supply system for the fuses on both sides of the three-rail current-receiving bogie of the utility model includes a bus high-speed circuit breaker BHB, a traction inverter VVVF, and a power supply module. The power supply module consists of two current receivers CCS and two Composed of fuses F, the two fuses F between the two current receivers CCS are connected in series, the two series fuses F are connected in parallel with the wires between the two current receivers CCS, and the neutral between the two series fuses F The point is the electrical connection access point, a power supply module in the trailer with cab is connected to the bus high-speed circuit breaker BHB in the trailer with cab, and the two power supply modules in the first motor car M1 are connected in parallel to the first section Between the bus high-speed circuit breaker BHB of the motor car M1 and the traction inverter VVVF, the two power supply modules in the second motor car M2 are connected in parallel to the bus high-speed circuit breaker BHB of the first motor car M1 and the traction inverter of the second motor car M2. Inverter between VVVF.

Current receivers share a single fuse. When the vehicle goes up, the current receiver on one side works, and the current reaches the bus high-speed circuit breaker through the fuse, and is transmitted to the traction inverter through the bus high-speed circuit breaker.

Claims (1)

1. a rail is flowed bogie truck both sides fuse parallel operation system; Comprise bus Qb, traction invertor, subordinate inverter, supply module; It is characterized in that; Supply module is made up of two pantagraph current collectors and two fuses, two fuses series connection between two pantagraph current collectors, and two series connected fuses are parallelly connected with the lead between two pantagraph current collectors; Two mid points of connecting between the fuse are the electrical connection access point; A supply module in the trailer is connected with the interior bus Qb of trailer, and between the bus Qb and traction invertor of two supply modules parallel connection access first segment motor-cars in the first segment motor-car, the bus Qb and second that two interior supply modules parallel connections of the second joint motor-car insert the first segment motor-cars saves between the traction invertor of motor-car.

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