阅读说明：本技术 一种动车组交直流网侧电路及其控制方法 (A kind of EMU alternating current-direct current circuit on side of overhead contact line and its control method ) 是由 李丰收 周安德 李西宁 黄威 何中建 孙雨彤 于 2019-09-09 设计创作，主要内容包括：本发明公开了一种动车组交直流网侧电路及其控制方法,包括两组供电单元、高压电缆和高压隔离开关；各供电单元包括受电弓、交直流检测装置、交流真空断路器、主变压器、变流器、接地装置、第一交直流转换开关、直流断路器、第二交直流转换开关；受电弓通过交直流检测装置、交流真空断路器、主变压器、变流器与牵引电机相连；第一交直流转换开关一端接于交直流检测装置与交流真空断路器间,另一端与直流断路器一端相连,直流断路器另一端与主变压器及第二交直流转换开关的第一不动端相连,第二交直流转换开关的第二不动端接于交流真空断路器与主变压器间；动端接于高压电缆上。本发明结构简单、控制可靠,能够在交直流供电模式之间进行快速切换。(The invention discloses a kind of EMU alternating current-direct current circuit on side of overhead contact line and its control methods, including two groups of power supply units, high-tension cable and high voltage isolator；Each power supply unit includes pantograph, alternating current-direct current detection device, AC vacuum circuit-breaker, main transformer, current transformer, earthing or grounding means, the first AC-DC conversion switch, dc circuit breaker, the second AC-DC conversion switch；Pantograph is connected by alternating current-direct current detection device, AC vacuum circuit-breaker, main transformer, current transformer with traction electric machine；First AC-DC conversion switch, one end is connected between alternating current-direct current detection device and AC vacuum circuit-breaker, the other end is connected with dc circuit breaker one end, the dc circuit breaker other end is connected with the first non-moving end of main transformer and the second AC-DC conversion switch, and the second of the second AC-DC conversion switch is motionless to be terminated between AC vacuum circuit-breaker and main transformer；Moved end is connected on high-tension cable.The configuration of the present invention is simple, control are reliable, can be switched fast between supplied by AC/DC electricity mode.)

1. a kind of EMU alternating current-direct current circuit on side of overhead contact line, which is characterized in that including two groups of power supply units, high-tension cable (8) and normally closed High voltage isolator (17)；

Each power supply unit includes for receiving the pantograph (1) of voltage on contact net (0), alternating current-direct current detection device (2), normally opened AC vacuum circuit-breaker (3), main transformer (12), current transformer (13), earthing or grounding means (16), the first normally opened AC-DC conversion are opened Close (4), normally opened dc circuit breaker (6), the second AC-DC conversion switch of single-pole double-throw type (18)；Wherein, pantograph (1) is defeated Outlet passes sequentially through alternating current-direct current detection device (2), AC vacuum circuit-breaker (3), main transformer (12), current transformer (13) and motor-car The traction electric machine (14) of group is connected；One end of the first AC-DC conversion switch (4) be connected to alternating current-direct current detection device (2) with exchange it is true Between empty breaker (3), the other end of the first AC-DC conversion switch (4) is connected with dc circuit breaker (6) one end, direct current interruption Device (6) other end passes sequentially through main transformer (12), current transformer (13) is connected with the traction electric machine (14) of EMU, direct current interruption Device (6) other end is also connected with the first non-moving end of the second AC-DC conversion switch (18), the second AC-DC conversion switch (18) Second motionless be terminated between AC vacuum circuit-breaker (3) and main transformer (12)；Under normality, the second AC-DC conversion switch (18) the first non-moving end is connected with the moved end of the second AC-DC conversion switch (18)；

Main transformer (12) and current transformer (13) are grounded by earthing or grounding means (16)；

Two power supply units are connected by high-tension cable (8), and the moved end of the second AC-DC conversion switch (18) is connected to high-tension cable (8) On, high voltage isolator (17) is set on the high-tension cable (8) between two power supply units.

2. EMU alternating current-direct current circuit on side of overhead contact line as described in claim 1, which is characterized in that the AC vacuum circuit-breaker (3) It is grounded by earthing switch (31).

3. EMU alternating current-direct current circuit on side of overhead contact line as described in claim 1, which is characterized in that further include be set to two power supply units it Between high-tension cable (8) on workshop wire jumper (9).

4. EMU alternating current-direct current circuit on side of overhead contact line as described in claim 1, which is characterized in that further include being set to alternating current-direct current detection dress The voltage transformer (10) between (2) and AC vacuum circuit-breaker (3) is set, AC vacuum circuit-breaker (3) and main transformer are set to (12) the first current transformer (11) between, the second Current Mutual Inductance being set between main transformer (12) and earthing or grounding means (16) Device (15).

5. EMU alternating current-direct current circuit on side of overhead contact line as described in claim 1, which is characterized in that further include be set to pantograph (1) with The first arrester (51) between alternating current-direct current detection device (2) is set to the first AC-DC conversion switch (4) and dc circuit breaker (6) the second arrester (52) between, the third arrester being set between AC vacuum circuit-breaker (3) and main transformer (12) (53)。

6. a kind of control method of the EMU alternating current-direct current circuit on side of overhead contact line as described in any one of claim 1 to 5, which is characterized in that In the equal fault-free of two power supply units, comprising:

The pantograph (1) of some power supply unit is risen, corresponding alternating current-direct current detection device (2) detection of rising bow power supply unit connects The network pressure of net-fault (0)；

If detecting, current contact net (0) network pressure for exchange, keeps high voltage isolator (17) to be closed, and keeps two power supplies single The first AC-DC conversion switch (4) of member disconnects, and is closed the AC vacuum circuit-breaker (3) of rising bow power supply unit, contact net (0) The main transformer (12) for connecting rising bow power supply unit passes through the traction electric machine of rising bow power supply unit under Alternating Current Power Supply mode (14) it powers；Meanwhile two the moved end of the second AC-DC conversion switch (18) of power supply unit be connected with the second non-moving end, contact net (0) main transformer (12) for connecting non-rising bow power supply unit, passes through the traction of non-rising bow power supply unit under Alternating Current Power Supply mode Motor (14) power supply；

If detecting, current contact net (0) network pressure is direct current, and high voltage isolator (17) is kept to be closed, and keeps two power supplies single The AC vacuum circuit-breaker (3) of member disconnects, and keeps the moved end of two power supply units to be connected with the first non-moving end, is closed at and has risen Bend the first AC-DC conversion switch (4) and dc circuit breaker (6) of power supply unit, contact net (0) connects two power supply units Main transformer (12) is powered under direct current supply mode by the traction electric machine (14) of two power supply units.

7. the control method of EMU alternating current-direct current circuit on side of overhead contact line as claimed in claim 6, which is characterized in that when a certain power supply is single When equipment in member breaks down, disconnects high voltage isolator (17), EMU is powered by another power supply unit.

8. the control method of EMU alternating current-direct current circuit on side of overhead contact line as claimed in claim 6, which is characterized in that Alternating Current Power Supply mode It switches to before direct current supply mode, first the AC vacuum circuit-breaker (3) of two power supply unit of disjunction, then vehicle sliding is to straight Stream power supply area and the rising bow state for keeping pantograph (1), last alternating current-direct current detection device (2) is to current contact net (0) net Pressure is detected, and when detecting current contact net (0) network pressure is direct current, the first alternating current-direct current for being closed rising bow power supply unit turns Change switch (4) and dc circuit breaker (6), at the same connect in two power supply units the moved end of the second AC-DC conversion switch (18) and First non-moving end is switched to direct current supply mode.

9. the control method of EMU alternating current-direct current circuit on side of overhead contact line as claimed in claim 6, which is characterized in that direct current supply mode It switches to before Alternating Current Power Supply mode, first the dc circuit breaker (6) of two power supply unit of disjunction, then vehicle sliding is to exchanging confession Electric region and the rising bow state for keeping pantograph (1), last alternating current-direct current detection device (2) to current contact net (0) network pressure into Row detection disconnects first AC-DC conversion switch of two power supply units when detecting current contact net (0) network pressure to exchange (4), and be closed the AC vacuum circuit-breaker (3) in rising bow power supply unit, at the same connect in two power supply units second hand over it is straight The moved end and the second non-moving end for flowing change-over switch (18), are switched to Alternating Current Power Supply mode.

Technical field

The present invention is more particularly directed to a kind of EMU alternating current-direct current circuit on side of overhead contact line and its control methods.

Background technique

Net side power supply system is the critical system of train, and the quality of net side power supply system main circuit design is train quality One of essential condition of guarantee.With the development of EMU technology, the EMU of single power supply system is used in traditional sense, such as It powers using exchange 25kV power supply or using direct current 3000V, single power supply line can only be applicable in.Do not have for some The region of the standard of unified power supply, such as European Union region, in different regions, there are different power supply systems for same country.There is also certain The vehicle of one country needs to run to other countries, but the power supply system of country variant is also possible to all inconsistent, therefore has one Kind emu vehicle will adapt to the tight demand of different bow net power supply systems.But at present for this power supply electricity for adapting to alternating current-direct current The EMU main circuit on road does not have CROSS REFERENCE.Although 201510518959.9 are used for the AC-DC conversion control of double-current system EMU Circuit processed discloses a kind of conversion circuit for EMU double fluid, only lays particular emphasis on the context of detection of the alternating current-direct current of vehicle, but It is no for the multithread power supply main circuit aspect of EMU that feasible scheme is provided.

Summary of the invention

It is an object of the present invention to provide one in the prior art without multithread for the deficiency of electric EMU main circuit Kind structure is simple, controls reliable EMU alternating current-direct current circuit on side of overhead contact line and its control method, is applicable in Alternating Current Power Supply mode and direct current Powering mode, and can be switched fast between supplied by AC/DC electricity mode.

In order to solve the above technical problems, the technical scheme adopted by the invention is that:

A kind of EMU alternating current-direct current circuit on side of overhead contact line, its main feature is that including two groups of power supply units, high-tension cable and normally closed height Press disconnecting switch；

Each power supply unit includes for receiving the pantograph of voltage on contact net, alternating current-direct current detection device, normally opened exchange Vacuum circuit breaker, main transformer, current transformer, earthing or grounding means, the first normally opened AC-DC conversion switch, normally opened direct current interruption Device, the second AC-DC conversion switch of single-pole double-throw type；Wherein, the output end of pantograph passes sequentially through alternating current-direct current detection device, hands over Flow vacuum breaker, main transformer, current transformer are connected with the traction electric machine of EMU；One termination of the first AC-DC conversion switch Between alternating current-direct current detection device and AC vacuum circuit-breaker, the other end and dc circuit breaker one of the first AC-DC conversion switch End is connected, and the dc circuit breaker other end passes sequentially through main transformer, current transformer is connected with the traction electric machine of EMU, direct current interruption The device other end is also connected with the first non-moving end of the second AC-DC conversion switch, the second non-moving end of the second AC-DC conversion switch It is connected between AC vacuum circuit-breaker and main transformer；Under normality, the first non-moving end and second of the second AC-DC conversion switch The moved end of AC-DC conversion switch is connected；

Main transformer and current transformer are grounded by earthing or grounding means；

Two power supply units are connected by high-tension cable, and the moved end of the second AC-DC conversion switch is connected on high-tension cable, high Disconnecting switch is pressed to be set on the high-tension cable between two power supply units.

Further, the AC vacuum circuit-breaker passes through ground switch earthing.

It further, further include the workshop wire jumper being set on the high-tension cable between two power supply units.

It further, further include the voltage transformer being set between alternating current-direct current detection device and AC vacuum circuit-breaker, if The first current transformer between AC vacuum circuit-breaker and main transformer, between main transformer and earthing or grounding means Two current transformers.

It further, further include being set to first set on the first arrester between pantograph and alternating current-direct current detection device and handing over The second arrester between direct current change-over switch and dc circuit breaker, between AC vacuum circuit-breaker and main transformer Three arresters.

Based on the same inventive concept, the present invention also provides a kind of controlling parties of EMU alternating current-direct current circuit on side of overhead contact line Method, its main feature is that in the equal fault-free of two power supply units, comprising:

The pantograph of some power supply unit is risen, the corresponding alternating current-direct current detection device detection contact of rising bow power supply unit The network pressure of net；

If detecting, current contact net network pressure for exchange, keeps high voltage isolator to be closed, keeps two power supply units The first AC-DC conversion switch disconnect, the AC vacuum circuit-breaker of closure rising bow power supply unit, contact net connects rising bow The main transformer of power supply unit passes through the traction electric machine power supply of rising bow power supply unit under Alternating Current Power Supply mode；Meanwhile two supply The moved end of second AC-DC conversion switch of electric unit is connected with the second non-moving end, and contact net connects the master of non-rising bow power supply unit Transformer is powered under Alternating Current Power Supply mode by the traction electric machine of non-rising bow power supply unit；

If detecting, current contact net network pressure is direct current, keeps high voltage isolator to be closed, keeps two power supply units AC vacuum circuit-breaker disconnect, keep the moved end of two power supply units to be connected with the first non-moving end, be closed at rising bow supply The first AC-DC conversion switch and dc circuit breaker of electric unit, contact net connects the main transformer of two power supply units, straight Flow the traction electric machine power supply under powering mode by two power supply units.

Further, when the equipment in a certain power supply unit breaks down, high voltage isolator is disconnected, event will occur The faulty equipment of the power supply unit of barrier is isolated, and is powered by another power supply unit to EMU.Circuit can half train just Often operation.

Further, before Alternating Current Power Supply pattern switching to direct current supply mode, the exchange of two power supply unit of disjunction first Vacuum circuit breaker, it is ensured that vehicle is in no bow net power supply state, and then vehicle sliding to direct current supply region and keeps pantograph Rising bow state, last alternating current-direct current detection device detects current contact net network pressure, when detecting current contact net net When pressure is direct current, it is closed the first AC-DC conversion switch and dc circuit breaker of rising bow power supply unit, while connecting two confessions The moved end of the second AC-DC conversion switch and the first non-moving end, are switched to direct current supply mode in electric unit.It completes from exchange It powers to the switching of direct current supply.

Further, before direct current supply pattern switching to exchange powering mode, the direct current of two power supply unit of disjunction first Breaker, it is ensured that vehicle is in no bow net power supply state, and then vehicle sliding extremely exchanges power supply area and keeps the liter of pantograph Arciform state, last alternating current-direct current detection device detect current contact net network pressure, when detecting that current contact net network pressure is When exchange, first AC-DC conversion switch of two power supply units, and the AC vacuum being closed in rising bow power supply unit are disconnected Breaker, while the moved end and the second non-moving end of the second AC-DC conversion switch in two power supply units are connected, it is switched to exchange Powering mode.Complete the switching from direct current supply to Alternating Current Power Supply.

Compared with prior art, the invention has the following advantages:

First, it can be applicable in Alternating Current Power Supply and direct current supply, the vehicle scope of application is big.

Second, it can do and be switched fast online under different power supply systems, vehicle is without carrying out additional transformation and increase Equipment reduces the maintenance cost of vehicle.

Third, two power supply units are designed as symmetrical structure, and a certain power supply unit breaks down, can be cut off online every From vehicle can still continue to run, and the proteges of the powerful who stay with their benefactions like parasites for avoiding vehicle is offline, improve the punctuality rate of vehicle.

4th, alternating current-direct current common bus reduces the wiring of vehicle.

Detailed description of the invention

Fig. 1 is alternating current-direct current circuit on side of overhead contact line structure diagram of the present invention.

Fig. 2 is alternating supply voltage flow graph.

Fig. 3 is direct current supply voltage flow graph.

Fig. 4 is Alternating Current Power Supply pattern switching to direct current supply mode process figure.

Wherein, 0- contact net, 1- pantograph, 2- alternating current-direct current detection device, 3- AC vacuum circuit-breaker, 31- earthing switch, The first AC-DC conversion switch of 4-, the first arrester of 51-, the second arrester of 52-, 53- third arrester, 6- dc circuit breaker (band high-voltaghe compartment), 8- high-tension cable, the workshop 9- wire jumper, 10- voltage transformer, the first current transformer of 11-, 12- main transformer, 13- current transformer, 14- traction electric machine, the second current transformer of 15-, 16- earthing or grounding means, 17- high voltage isolator, 18- second are handed over Direct current change-over switch.

Specific embodiment

To keep above-mentioned solution technical problem of the invention, summary of the invention, invention effect more obvious and easy to understand, below with reference to figure The present invention is described in further detail with embodiment.

As shown in Figure 1, EMU alternating current-direct current circuit on side of overhead contact line includes two groups of power supply units being arranged symmetrically, 8 and of high-tension cable Normally closed high voltage isolator 17；

Each power supply unit includes the pantograph 1, alternating current-direct current detection device 2, normally opened friendship for receiving voltage on contact net 0 It is flow vacuum breaker 3, main transformer 12, current transformer 13, earthing or grounding means 16, the first normally opened AC-DC conversion switch 4, normally opened Dc circuit breaker 6, the second AC-DC conversion switch of single-pole double-throw type 18；Wherein, the output end of pantograph 1 passes sequentially through alternating current-direct current Detection device 2, AC vacuum circuit-breaker 3, main transformer 12, current transformer 13 are connected with the traction electric machine 14 of EMU；First hands over One end of direct current change-over switch 4 is connected between alternating current-direct current detection device 2 and AC vacuum circuit-breaker 3, and the first AC-DC conversion is opened The other end of pass 4 is connected with 6 one end of dc circuit breaker, and 6 other end of dc circuit breaker passes sequentially through main transformer 12, current transformer 13 It is connected with the traction electric machine 14 of EMU, 6 other end of dc circuit breaker is also motionless with the first of the second AC-DC conversion switch 18 End is connected, and the second of the second AC-DC conversion switch 18 is motionless to be terminated between AC vacuum circuit-breaker 3 and main transformer 12；Often Under state, the first non-moving end of the second AC-DC conversion switch 18 is connected with the moved end of the second AC-DC conversion switch 18；

Main transformer 12 and current transformer 13 are grounded by earthing or grounding means 16；Main transformer 12 and current transformer 13, which are applicable in, to be handed over directly Flow power supply input.

Two power supply units are connected by high-tension cable 8, and the moved end of the second AC-DC conversion switch 18 is connected to high-tension cable 8 On, high voltage isolator 17 is set on the high-tension cable 8 between two power supply units.High-tension cable 8 and workshop wire jumper 9 are alternating current-direct current It shares.

The AC vacuum circuit-breaker 3 is grounded by earthing switch 31.

EMU alternating current-direct current circuit on side of overhead contact line further includes the workshop wire jumper 9 on the high-tension cable 8 between two power supply units.

EMU alternating current-direct current circuit on side of overhead contact line further includes being set between alternating current-direct current detection device 2 and AC vacuum circuit-breaker 3 Voltage transformer 10, the first current transformer 11 between AC vacuum circuit-breaker 3 and main transformer 12 are set to main transformer pressure The second current transformer 15 between device 12 and earthing or grounding means 16.

EMU alternating current-direct current circuit on side of overhead contact line further includes lightning-arrest set on first between pantograph 1 and alternating current-direct current detection device 2 Device 51, the second arrester 52 between the first AC-DC conversion switch 4 and dc circuit breaker 6 are set to AC vacuum open circuit Third arrester 53 between device 3 and main transformer 12.

Ac power supply circuit main component composition includes: contact net 0, pantograph 1, alternating current-direct current detection device 2, AC vacuum Breaker 3, earthing switch 31, the second AC-DC conversion switch 18, high-tension cable 8, workshop wire jumper 9, main transformer 12, current transformer 13, traction electric machine 14, earthing or grounding means 16, high voltage isolator 17.

Direct current power supply loop main component composition include: contact net 0, pantograph 1, alternating current-direct current detection device 2, first hand over it is straight Flow change-over switch 4, dc circuit breaker 6 (band high-voltaghe compartment), the second AC-DC conversion switch 18, high-tension cable 8, workshop wire jumper 9, master Transformer 12, current transformer 13, traction electric machine 14, the second current transformer 15, earthing or grounding means 16, high voltage isolator 17.

Each component basic function is described as follows in EMU alternating current-direct current circuit on side of overhead contact line:

Pantograph 1- is used to receive the voltage on contact net 0；

Alternating current-direct current detection device 2- for detecting the voltage form of bow net after detecting rising bow, and export corresponding result to Control unit for vehicle；

AC vacuum circuit-breaker 3 and earthing switch 31- protect entire circuit for switching on and off alternating current circuit Shield；

First AC-DC conversion switch 4 and the second AC-DC conversion switch 18- for the switching of AC-DC Circuit, conducting and It disconnects；

Dc circuit breaker 6- protects entire circuit and (cooperates high-voltaghe compartment complete for switching on and off DC circuit At)；

High voltage isolator 17- is for being connected and disjunction AC-DC Circuit；

Main transformer 12, current transformer 13, traction electric machine 14- pass through commutation inversion, output phase for receiving combined-voltage The voltage answered, control traction electric machine 14 act, and reach the functions such as the traction braking of vehicle；

Other component such as arrester, various mutual inductors are the components of other protection control functions of group cost circuits, are this electricity The ancillary equipment on road.

The present invention is applicable in AC and DC contactor 0, is applicable in exchange 25kV, 15kV, 16.7Hz, direct current 3000V, direct current 1500V bow net power supply system.It can automatically detect the power supply system of bow net, and carry out supplied by AC/DC electricity pattern switching online.

When the present invention works normally, rises Dan Gong and power to vehicle.

The working principle of the invention: the pantograph 1 of left side power supply unit in Fig. 1 is risen, alternating current-direct current detection device 2 is to contact net 0 alternating current-direct current network pressure is judged.If detecting, current network pressure is Alternating Current Power Supply (such as exchange 25kV or 15kV), illustrates vehicle In Alternating Current Power Supply mode, high voltage isolator 17 is remained closed, and two the first AC-DC conversion switch of power supply unit 4 are kept not AC vacuum circuit-breaker 3 that is dynamic, being closed in the power supply unit of left side, the main transformer 12 connected in the power supply unit of left side are completed The power supply of left side power supply unit.Meanwhile two second AC-DC conversion switch 18 of power supply unit get to exchange position (i.e. moved end and the The connection of two non-moving ends), the main transformer 12 in the power supply unit of right side is connected, i.e., is powered under completion Alternating Current Power Supply mode.If detection It is direct current supply (such as direct current 3000V or 1500V) to current network pressure, illustrates that vehicle is in direct current supply mode, high_voltage isolation Switch 17 remains closed, and two the first AC-DC conversion switch of power supply unit 4 are transformed into direct current position from ground connection position, and two power supply units are handed over Flow vacuum breaker 3 remains off constant dc circuit breaker 6 in the power supply unit of closure left side, and it is single to connect left side power supply Main transformer 12 in member completes left side power supply unit power supply.Meanwhile two power supply unit the second AC-DC conversion switch 18 It gets to direct current position (i.e. moved end is connected with the first non-moving end), connects the main transformer 12 in the power supply unit of right side, i.e. completion direct current It powers under powering mode.

Fault Isolation operating instruction: circuit of the present invention is either in Alternating Current Power Supply mode and is in direct current supply mode Under, the mode of Fault Isolation operation is consistent, is only illustrated under Alternating Current Power Supply mode.

Vehicle is under chopper bar electroless state:

If certain power supply unit equipment fault, high voltage isolator 17 is disconnected, failure power supply unit is isolated.It rises another normal The bow of power supply unit is powered, it is ensured that vehicle can half train operation to another power supply unit equipment.

Vehicle is under rising bow electriferous state that (pantograph 1 of the false power supply unit of left side as shown in figure 1 rises, and gives left side power supply The power supply of the equipment of unit and right side power supply unit):

If right side power supply unit failure, can disconnect high voltage isolator 17, right side failure power supply unit is isolated, is guaranteed Left side power supply unit operates normally.

If left side power supply unit failure disconnects the AC vacuum circuit-breaker 3 of left side power supply unit, and left side power supply is single The pantograph 1 of member is fallen, and high voltage isolator 17 is then turned off, and rises the pantograph 1 of right side power supply unit, and is closed right side and is supplied The AC vacuum circuit-breaker 3 of electric unit is powered to right side power supply unit equipment, to ensure that vehicle can half train operation.

The control method of EMU alternating current-direct current circuit on side of overhead contact line of the present invention, comprising: in two equal fault-frees of power supply unit When,

The pantograph 1 of some power supply unit is risen, the corresponding detection of alternating current-direct current detection device 2 of rising bow power supply unit connects The network pressure of net-fault 0；

If detecting, current 0 network pressure of contact net for exchange, keeps high voltage isolator 17 to be closed, and keeps two power supplies single First AC-DC conversion switch 4 of member disconnects, and is closed the AC vacuum circuit-breaker 3 of rising bow power supply unit, and contact net 0 is connected The main transformer 12 of rising bow power supply unit is powered under Alternating Current Power Supply mode by the traction electric machine 14 of rising bow power supply unit； Meanwhile two the moved end of the second AC-DC conversion switch 18 of power supply unit be connected with the second non-moving end, contact net 0 connects non-rising bow The main transformer 12 of power supply unit is powered under Alternating Current Power Supply mode by the traction electric machine 14 of non-rising bow power supply unit；

If detecting, current 0 network pressure of contact net is direct current, and high voltage isolator 17 is kept to be closed, and keeps two power supplies single The AC vacuum circuit-breaker 3 of member disconnects, and keeps the moved end of two power supply units to be connected with the first non-moving end, is closed at rising bow The first AC-DC conversion switch 4 and dc circuit breaker 6 of power supply unit, contact net 0 connect the main transformer of two power supply units 12, it is powered under direct current supply mode by the traction electric machine 14 of two power supply units.

When the equipment in a certain power supply unit breaks down, high voltage isolator 17 is disconnected, the confession of failure will occur The faulty equipment of electric unit is isolated, and is powered by another power supply unit to EMU.Circuit can half train normal operation.

Supplied by AC/DC electricity switching explanation:

Alternating Current Power Supply pattern switching is to direct current supply mode: when vehicle operates normally under AC mode, entering direct current Before powering mode, the AC vacuum circuit-breaker 3 of two power supply unit of disjunction first, it is ensured that vehicle in no bow net power supply state, Then vehicle sliding to direct current supply region and keeps the rising bow state of pantograph 1, and last alternating current-direct current detection device 2 is to current 0 network pressure of contact net is detected, and when detecting current 0 network pressure of contact net is direct current, is closed the first of rising bow power supply unit AC-DC conversion switch 4 and dc circuit breaker 6, while connecting the moved end of the second AC-DC conversion switch 18 in two power supply units With the first non-moving end, it is switched to direct current supply mode.Complete the switching from Alternating Current Power Supply to direct current supply.

Direct current supply pattern switching is to Alternating Current Power Supply mode: when vehicle operates normally under DC mode, exchanging entering Before powering mode, the dc circuit breaker 6 of two power supply unit of disjunction first, it is ensured that vehicle is in no bow net power supply state, then Vehicle sliding extremely exchange power supply area and the rising bow state for keeping pantograph 1, last alternating current-direct current detection device 2 is to current contact 0 network pressure of net is detected, and when detecting current 0 network pressure of contact net to exchange, disconnects first alternating current-direct current of two power supply units Change-over switch 4, and the AC vacuum circuit-breaker 3 being closed in rising bow power supply unit, while connecting second in two power supply units The moved end of AC-DC conversion switch 18 and the second non-moving end, are switched to Alternating Current Power Supply mode.Complete from direct current supply to exchange The switching of power supply.

Fig. 2 illustrates the flow graph of voltage under Alternating Current Power Supply mode.Rise the pantograph 1 of left side power supply unit, alternating current-direct current inspection Device 2 is surveyed to judge the alternating current-direct current network pressure of contact net 0.If detect current network pressure be Alternating Current Power Supply (as exchange 25kV or Person 15kV), the first AC-DC conversion switch 4 remains stationary and (is defaulted as ground connection position), the AC vacuum of closure left side power supply unit Breaker 3 connects main transformer 12 and completes left side power supply unit power supply.Meanwhile the second AC-DC conversion of two power supply units Switch 18 gets to exchange position (i.e. moved end is connected with the second non-moving end), and high voltage isolator 17 remains closed, and connects right side and supplies The main transformer 12 of electric unit is powered under completion Alternating Current Power Supply mode.

When breaking down under Alternating Current Power Supply mode: this power supply unit bow is risen, if another power supply unit failure, can directly break High voltage isolator 17 is opened, failure power supply unit is cut off, half train operation；If this power supply unit failure, need to change a liter behaviour Make, rises fault-free power supply unit pantograph 1 and power to normal cell, equally use 17 isolated fault unit of high voltage isolator.

Fig. 3 illustrates the flow graph of voltage under direct current supply mode.Rise the pantograph 1 of left side power supply unit, alternating current-direct current inspection Device 2 is surveyed to judge the alternating current-direct current network pressure of contact net 0.If detect current network pressure be direct current supply (such as direct current 3000V or Person 1500V), the first AC-DC conversion switch of left side power supply unit 4 is transformed into direct current position from ground connection position, and the exchange of two power supply units is true Empty breaker 3 remains off constant, dc circuit breaker 6 in the power supply unit of closure left side, master in the power supply unit of connection left side Transformer 12 completes the power supply of this power supply unit.Meanwhile the second AC-DC conversion switch 18 of two power supply units gets to direct current Position (i.e. moved end is connected with the first non-moving end) keeps high voltage isolator 17 to be closed, and connects right side power supply unit main transformer 12, It completes to power under direct current supply mode.

When breaking down under direct current supply mode: this power supply unit bow is risen, if another power supply unit failure, can directly break High voltage isolator 17 is opened, failure power supply unit is cut off, half train operation；If this power supply unit failure needs to change lift operations, It rises fault-free power supply unit pantograph 1 to power to normal cell, equally uses 17 isolated fault unit of high voltage isolator.

Fig. 4 illustrates Alternating Current Power Supply pattern switching to the process schematic of direct current supply mode.Vehicle is in Alternating Current Power Supply mould When operating normally under formula, vehicle is in Alternating Current Power Supply mode, before entering direct current supply mode (AC-DC conversion non-Electric region), Vehicle needs disjunction to power two unit AC vacuum circuit-breakers 3, it is ensured that vehicle is in no bow net power supply state, and vehicle sliding is to straight Power supply area is flowed, pantograph 1 keeps rising bow state, and alternating current-direct current detection device 2 detects current bow net state, it is ensured that is When direct current supply, the first AC-DC conversion switch 4 of rising bow power supply unit is switched to direct current position from ground connection position, is closed at The dc circuit breaker 6 of rising bow power supply unit is switched to direct current supply mode, i.e. completion cutting from Alternating Current Power Supply to direct current supply It changes.

The process of direct current supply pattern switching to Alternating Current Power Supply mode is similar, and this will not be repeated here, but has no effect on ability Technical staff's the understanding of the present invention in domain and realization.

The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific Embodiment, the above mentioned embodiment is only schematical, rather than limitation, those skilled in the art Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much Form, within these are all belonged to the scope of protection of the present invention.