阅读说明：本技术 双流制车辆交直流切换高压系统 (Double-current system vehicle alternating current-direct current switches high-pressure system ) 是由 李雪飞 张玉光 赵志强 于 2019-09-06 设计创作，主要内容包括：本发明公开了一种双流制车辆交直流切换高压系统,包括交直流受电弓、网压互感器、真空断路器,网压互感器根据监测到的电压幅值和频率以识别交直流受电弓接收交流电或直流电,真空断路器是接通或分断电源的总开关；该系统还包括交流电路、直流电路、交直流转换开关和避雷器；该系统的供电输出端连接有牵引变压器、牵引变流器。本发明的交直流切换系统将交流电路和直流电路集成为一体,并在总电路、交流电路和直流电路设计了电路保护器件,对交直流供电切换过程实现了过电保护,提高安全性；同时,本发明系统的受电弓、网压互感器、真空断路器、牵引变流器和牵引电机均为共用器件,极大地节约了制造成本和使用成本。(The invention discloses a kind of double-current system vehicle alternating current-direct currents to switch high-pressure system, including alternating current-direct current pantograph, network pressure mutual inductor, vacuum circuit breaker, network pressure mutual inductor identifies that alternating current-direct current pantograph receives alternating current or direct current according to the voltage magnitude and frequency that monitor, and vacuum circuit breaker is to turn on or the master switch of disjunction power supply；The system further includes alternating current circuit, DC circuit, AC-DC conversion switch and arrester；The power supply output end of the system is connected with tractive transformer, traction convertor.Alternating current-direct current switching system of the invention becomes one alternating current circuit and DC circuit, and devises circuit brake in way circuit, alternating current circuit and DC circuit, realizes overcurrent protection to supplied by AC/DC electricity handoff procedure, improves safety；Meanwhile pantograph, network pressure mutual inductor, vacuum circuit breaker, traction convertor and the traction electric machine of present system are common parts, have greatly saved manufacturing cost and use cost.)

1. double-current system vehicle alternating current-direct current switches high-pressure system, the system integration is in rail traffic, which is characterized in that the system Include:

Alternating current-direct current pantograph (2), the alternating current-direct current pantograph (2) contact with external contact net (1), the external contact net (1) For ac contactor net or direct current contact net；The alternating current-direct current pantograph (2) contacts with the ac contactor net to receive exchange and connect The high voltage of net-fault is contacted with the direct current contact net to receive the high current of direct current contact net；

Network pressure mutual inductor (201), the network pressure mutual inductor (201) are connected on the output bus of the alternating current-direct current pantograph (2), And the network pressure mutual inductor (201) identifies that the alternating current-direct current pantograph (2) receives according to the voltage magnitude and frequency that monitor Alternating current or direct current；

The system further include:

Alternating current circuit (3)；

DC circuit (4)；

Vacuum circuit breaker (202), the vacuum circuit breaker (202) make vehicle obtain always opening for power supply by connection or disjunction It closes；And

AC-DC conversion switch (203), the output end company of the AC-DC conversion switch (203) and the vacuum circuit breaker (202) It connects to receive the alternating current or direct current of alternating current-direct current pantograph (2) output；

The system has controller, and the controller receives the power supply signal of network pressure mutual inductor (201) identification and controls institute State the connection status of AC-DC conversion switch (203)；

When what network pressure mutual inductor (201) identification alternating current-direct current pantograph (2) received is direct current, the alternating current-direct current turns The command signal for changing switch (203) reception controller is connect with the input terminal of the DC circuit (4), and to traction current transformation Device (205) provides direct current supply, and traction convertor (205) drives traction electric machine (206)；

When what network pressure mutual inductor (201) identification alternating current-direct current pantograph (2) received is alternating current, the alternating current-direct current turns The command signal for changing switch (203) reception controller is connect with the input terminal of the alternating current circuit (3), and to traction voltage transformation Device (204) provides alternating current, and the alternating current of tractive transformer (204) output supplies traction convertor (205), traction convertor (205) traction electric machine (206) are driven；

The power supply output end of the system is connected with tractive transformer (204) and current transformer (205) and traction electric machine (206).

2. double-current system vehicle alternating current-direct current according to claim 1 switches high-pressure system, which is characterized in that the system is also wrapped Include circuit brake；

The circuit brake is divided into way circuit protection device, alternating-current circuit protector part and direct current circuit protector part；

The alternating-current circuit protector part includes the first alternating-current lightning arrestor for being connected to alternating current-direct current pantograph (2) output end (301), it is connected to the alternating current circuit (3) and is connect close to the AC-DC conversion switch (203) with the alternating current circuit (3) End the second alternating-current lightning arrestor (304) and be connected to the alternating current circuit (3) and the tractive transformer (204) connecting line The AC fuse (303) on road；

The direct current circuit protector part includes being connected to the DC circuit (4) and close to the AC-DC conversion switch (203) molten with the direct current arrester (401) of the DC circuit (4) connecting pin, the direct current being connected on the DC circuit (4) Disconnected device (402) and the high-speed circuit breaker for being connected to the DC circuit (4) Yu the current transformer (205) connection line (403)；

The way circuit protection device includes the vacuum circuit breaker for being connected to alternating current-direct current pantograph (2) output end (202), the vacuum circuit breaker (202) in Alternating Current Power Supply can direct disjunction circuit, the vacuum circuit breaker (202) is straight Disjunction is carried out again after high-speed circuit breaker (403) disjunction DC circuit when stream power supply.

3. double-current system vehicle alternating current-direct current according to claim 2 switches high-pressure system, which is characterized in that the alternating current-direct current by Pantograph (2) is DC1500V pantograph and AC25kV pantograph；

The AC fuse (303) is AC25kV fuse；

The DC fuse (402) is DC1500V fuse.

4. double-current system vehicle alternating current-direct current according to claim 2 switches high-pressure system, which is characterized in that the traction voltage transformation The input terminal and output end of device (204) are connected separately with current transformer (302).

5. double-current system vehicle alternating current-direct current according to any one of claim 1 to 4 switches high-pressure system, which is characterized in that The method of supplying power to of double-current system vehicle alternating current-direct current switching high-pressure system mainly includes the following steps:

S101, alternating current-direct current pantograph (2) are contacted with external contact net (1), to receive alternating current or direct current；

S102, network pressure mutual inductor (201) monitoring voltage amplitude and frequency are to identify that the alternating current-direct current pantograph (2) receives alternating current Or direct current；

S103, network pressure mutual inductor (201) identify after by electric situation of alternating current-direct current pantograph (2), send identification instruction to controller, Controller sends command signal to AC-DC conversion switch (203) according to the identification instruction received；

If the identification instruction that S104, controller receive is alternating current, controller controls AC-DC conversion switch (203) and hands over Current circuit (3) connection, and alternating current is provided to tractive transformer (204), the alternating current supply of tractive transformer (204) output is led Draw current transformer (205), traction convertor (205) drives traction electric machine (206)；

If the identification instruction that S105, controller receive is direct current, controller controls AC-DC conversion switch (203) and straight Current circuit (4) connection, and direct current is provided to traction convertor (205), traction convertor (205) drives traction electric machine (206).

6. double-current system vehicle alternating current-direct current according to claim 5 switches high-pressure system, which is characterized in that the alternating current-direct current turns Changing switch (203) is single-pole double-throw switch (SPDT).

7. double-current system vehicle alternating current-direct current according to claim 5 switches high-pressure system, which is characterized in that the DC circuit (4) direct current reactor (404) are installed with the connecting pin of the current transformer (205).

Technical field

The present invention relates to the urban transportation technical field more particularly to a kind of switching of double-current system vehicle alternating current-direct current are high Pressure system.

Background technique

Currently, domestic rail traffic generally uses power supply mode, the usual route of urban rail route is shorter, station spacing compared with Small, the features such as rising fastly fastly stop in conjunction with economic benefit and vehicle, therefore general city rail vehicle is powered using DC1500V；Conversely, state's iron Route is longer, station spacing is longer, line loss is larger, and native land iron car is powered using AC25kV.

With the development of town and country construction, it is badly in need of establishing the express passway of connection " key city " Yu " suburb city ", city Rail traffic scope constantly expands, the administrative region of a city railway for connecting between key city and satellite city and satellite city meet the tendency of and It is raw.If power supply system cannot be unified, vehicle will be unable to realize that then people can only be solved by way of transfer from city through operation Area brings big inconvenience to the trip of people to the problem by bus in suburbs.

Traditional subway vehicle is powered using DC750V or DC1500V, and technology is very mature, and China possesses fortune for many years With experience, same AC25kV is applied successfully on high-speed rail route, and technology has reached the leading level in the world, but in same train The upper integrated trailer system for being not only able to satisfy direct current supply but also be able to satisfy Alternating Current Power Supply, is not the simple component by two kinds of standards Be installed on vehicle, need to realize two systems section components and share, and the component that can be shared is more, then manufacturing cost and Use cost is lower.

Based on above-mentioned technical problem, those skilled in the art needs to research and develop a kind of double-standard for realizing more common component Power supply system can be improved safety to reduce manufacturing cost and use cost.

Summary of the invention

The purpose of the present invention is be to solve in the prior art double-standard power supply system manufacturing cost is high, use cost is high, And the technical problem that safety is poor, provide a kind of double-current system vehicle alternating current-direct current switching that is safe and reliable, reducing use cost High-pressure system.

To achieve the goals above, the invention provides the following technical scheme:

Double-current system vehicle alternating current-direct current of the invention switches high-pressure system, and the system integration is in rail traffic, the system Include:

Alternating current-direct current pantograph, the alternating current-direct current pantograph are contacted with external contact net, and the external contact net is that exchange connects Net-fault or direct current contact net；The alternating current-direct current pantograph is contacted with the ac contactor net to receive the height electricity of ac contactor net Pressure is contacted with the direct current contact net to receive the high current of direct current contact net；

Network pressure mutual inductor, the network pressure mutual inductor is connected on the output bus of the alternating current-direct current pantograph, and the net Pressure mutual inductor identifies that the alternating current-direct current pantograph receives alternating current or direct current according to the voltage magnitude and frequency that monitor；

The system further include:

Alternating current circuit；

DC circuit；

Vacuum circuit breaker, the vacuum circuit breaker make vehicle obtain the master switch of power supply by connection or disjunction；With And

AC-DC conversion switch, the AC-DC conversion switch connect described to receive with the output end of the vacuum circuit breaker The alternating current or direct current of alternating current-direct current pantograph output；

The system has controller, and the controller receives the power supply signal of the network pressure mutual inductor identification and controls institute State the connection status of AC-DC conversion switch；

When what the network pressure mutual inductor identified that the alternating current-direct current pantograph receives is direct current, the AC-DC conversion is opened The command signal for closing the reception controller is connect with the input terminal of the DC circuit, and is provided direct current to traction convertor and supplied Electricity, traction convertor drive traction electric machine；

When what the network pressure mutual inductor identified that the alternating current-direct current pantograph receives is alternating current, the AC-DC conversion is opened The command signal for closing the reception controller is connect with the input terminal of the alternating current circuit, and provides exchange to tractive transformer Electricity, the alternating current of tractive transformer output supply traction convertor, and traction convertor drives traction electric machine；

The power supply output end of the system is connected with tractive transformer, traction convertor and traction electric machine.

Further, the system also includes circuit brakes；

The circuit brake is divided into way circuit protection device, alternating-current circuit protector part and direct current circuit protector Part；

The alternating-current circuit protector part include the first alternating-current lightning arrestor for being connected to the alternating current-direct current pantograph output end, It is connected to the alternating current circuit and is exchanged close to the AC-DC conversion switch with the second of the alternating current circuit connecting pin and taken shelter from the thunder Device and the AC fuse for being connected to the alternating current circuit Yu the tractive transformer connection line；

The direct current circuit protector part include be connected to the DC circuit and close to the AC-DC conversion switch with The direct current arrester of the DC circuit connecting pin, the DC fuse being connected on the DC circuit and it is connected to institute State the high-speed circuit breaker of DC circuit Yu the current transformer connection line；

The way circuit protection device includes the vacuum circuit breaker for being connected to the alternating current-direct current pantograph output end, described true Empty breaker can directly disjunction circuit, the vacuum circuit breaker divide in direct current supply in high-speed circuit breaker in Alternating Current Power Supply Disjunction is carried out again after disconnected DC circuit.

Further, the alternating current-direct current pantograph is DC1500V pantograph and AC25kV pantograph；

The AC fuse is AC25kV fuse；

The DC fuse is DC1500V fuse.

Further, the input terminal of the tractive transformer and output end are connected separately with current transformer.

Further, the method for supplying power to of double-current system vehicle alternating current-direct current switching high-pressure system mainly includes the following steps:

S101, alternating current-direct current pantograph are contacted with external contact net, to receive alternating current or direct current；

S102, network pressure mutual inductor monitoring voltage amplitude and frequency are to identify that the alternating current-direct current pantograph receives alternating current or straight Galvanic electricity；

S103, network pressure mutual inductor identify after by electric situation of alternating current-direct current pantograph, send identification instruction, control to controller Device sends command signal to AC-DC conversion switch according to the identification instruction received；

If the identification instruction that S104, controller receive is alternating current, controller controls AC-DC conversion switch and hands over Current circuit connection, and alternating current is provided to tractive transformer, the alternating current of tractive transformer output supplies traction convertor, traction Current transformer drives traction electric machine；

If identification that S105, controller receive instruction is direct current, controller controls AC-DC conversion switch and straight Current circuit connection, and direct current supply is provided to traction convertor, traction convertor drives traction electric machine.

Further, the AC-DC conversion switch is single-pole double-throw switch (SPDT).

Further, the connecting pin of the DC circuit and the current transformer is equipped with direct current reactor.

In the above-mentioned technical solutions, a kind of double-current system vehicle alternating current-direct current provided by the invention switches high-pressure system, have with It is lower the utility model has the advantages that

1, alternating current-direct current switching system of the invention becomes one alternating current circuit and DC circuit, and in way circuit, friendship Current circuit and DC circuit devise circuit brake, realize overcurrent protection to supplied by AC/DC electricity handoff procedure, improve peace Quan Xing；Meanwhile system network pressure mutual inductor, vacuum circuit breaker, net current transformer, tractive transformer and traction convertor of the invention It is common parts, has greatly saved manufacturing cost and use cost.

2, alternating current-direct current switching system of the invention in order to reduce as far as possible high-voltaghe compartment internal unit gap, increase roof it is true Empty fuse, AC-DC conversion switch, alternating-current lightning arrestor, direct current arrester electric clearance and creepage distance, mitigate equipment weight Amount, while by protecting device to guarantee reliability and service life in AC-DC conversion process middle-and-high voltage system.

Detailed description of the invention

In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to institute in embodiment Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only one recorded in the present invention A little embodiments are also possible to obtain other drawings based on these drawings for those of ordinary skill in the art.

Fig. 1 is the principle topological diagram that double-current system vehicle alternating current-direct current disclosed by the embodiments of the present invention switches high-pressure system；

Fig. 2 is the control method principle frame that double-current system vehicle alternating current-direct current disclosed by the embodiments of the present invention switches high-pressure system Figure.

Description of symbols:

1, contact net；2, alternating current-direct current pantograph；3, alternating current circuit；4, DC circuit；

201, network pressure mutual inductor；202, vacuum circuit breaker；203, AC-DC conversion switch；204, tractive transformer；205, Traction convertor；206, traction electric machine；

301, the first alternating-current lightning arrestor；302, current transformer；303, AC fuse；304, the second alternating-current lightning arrestor；

401, direct current arrester；402, DC fuse；403, high-speed circuit breaker；404, direct current reactor.

Specific embodiment

In order to make those skilled in the art more fully understand technical solution of the present invention, below in conjunction with attached drawing to this hair It is bright to be further detailed.

It is shown in Figure 1；

Wherein, the principle that Fig. 1 shows a kind of switching high-pressure system of double-current system vehicle alternating current-direct current disclosed in the present embodiment is opened up Flutter figure；

A kind of double-current system vehicle alternating current-direct current disclosed by the embodiments of the present invention switches high-pressure system, which hands in track On logical, and the system includes:

Alternating current-direct current pantograph 2, alternating current-direct current pantograph 2 are contacted with external contact net 1, and external contact net 1 is ac contactor net Or direct current contact net；Alternating current-direct current pantograph 2 is contacted with ac contactor net to receive the high voltage of ac contactor net or connect with direct current Contact touch net to receive the high current of direct current contact net；

Network pressure mutual inductor 201, network pressure mutual inductor 201 are connected to the output bus of alternating current-direct current pantograph 2, and network pressure mutual inductor The voltage magnitude and frequency that 201 bases monitor are to identify that alternating current-direct current pantograph 2 receives alternating current or direct current；

The system further include:

Alternating current circuit 3；

DC circuit 4；

Vacuum circuit breaker 202, the vacuum circuit breaker 202 make vehicle obtain always opening for power supply by connection or disjunction It closes；And

AC-DC conversion switch 203, the AC-DC conversion switch 203 are connect with the output end of vacuum circuit breaker 202 to connect Receive alternating current or direct current that alternating current-direct current pantograph 2 exports；

The system has controller (not shown), and controller receives the power supply signal, simultaneously that network pressure mutual inductor 201 identifies Control the connection status of AC-DC conversion switch 203；

When what the identification of network pressure mutual inductor 201 alternating current-direct current pantograph 2 received is direct current, AC-DC conversion switch 203 is connect The command signal of admission controller is connect with the input terminal of DC circuit 4, and provides direct current supply, traction to traction convertor 205 Current transformer 205 drives traction electric machine 206；

When what the identification of network pressure mutual inductor 201 alternating current-direct current pantograph 2 received is alternating current, AC-DC conversion switch 203 is connect The command signal of admission controller is connect with the input terminal of alternating current circuit 3, and provides alternating current to tractive transformer 204, and traction becomes The alternating current that depressor 204 exports supplies traction convertor 205, and traction convertor 205 drives traction electric machine 206；

The power supply output end of the system is connected with tractive transformer 204, traction convertor 205 and traction electric machine 206.

Specifically, present embodiment discloses a kind of power supplies that ac power circuit and DC power-supply circuit become one System, as alternating current-direct current switch high-pressure system, which is broadly divided into alternating current circuit 3, DC circuit 4 and common circuit, wherein In order to smoothly receive alternating current and direct current, the alternating current-direct current pantograph 2 contacted with external contact net 1 is mounted in roof, Wherein, according to the difference of running region, external contact net 1 can be converted at any time, be specially converted into direct current by ac contactor net and connect It touches net or ac contactor net is converted by direct current contact net, and when alternating current-direct current pantograph 2 and ac contactor net 1 contact, it receives Be exactly alternating current, and when contacting with direct current contact net, what is received is exactly direct current.It is contacted by alternating current-direct current pantograph 2 The classification difference of contact net 1 realizes the conversion for receiving power supply, meanwhile, in order to monitor the received direct current of alternating current-direct current pantograph 2 or Alternating current is connected to network pressure mutual inductor 201 in the output end of alternating current-direct current pantograph 2, which is primarily used to adopt Collection measurement route voltage, so as to calculate vehicle consumption power and electric energy, while be used to be vehicle control syetem Detection data is provided with traction convertor 205, so that when over-voltage or under-voltage fault occur for power supply line in protection circuit Important equipment, such as tractive transformer, traction convertor and traction electric machine.By being connect with the output end of alternating current-direct current pantograph 2, supervise Survey and identification alternating current-direct current pantograph 2 it is received be alternating current or direct current, and done for the switching of subsequent AC-DC conversion switch 203 Prepare.

Since there are alternating current circuits 3 and DC circuit 4, according to the received alternating current of alternating current-direct current pantograph 2 and direct current The circuit switching of AC-DC conversion switch 203 is completed, final realize exports tractive transformer 204 or traction convertor 205 Corresponding direct current supply or Alternating Current Power Supply, it is final to drive traction electric machine 206.

Since there are alternating current circuits 3 and DC circuit 4, and when needing under power supply state according to the power supply signal received Carve the connection status of switching AC-DC conversion switch 203, it is contemplated that protection when circuit converts, system further includes circuit protector Part；

Wherein, the circuit brake in the present embodiment is divided into way circuit protection device, alternating-current circuit protector part and straight Current circuit protects device；

Alternating-current circuit protector part includes the first alternating-current lightning arrestor 301 for being connected to 2 output end of alternating current-direct current pantograph, connection In alternating current circuit 3 and close to the second alternating-current lightning arrestor 304, the Yi Jilian of AC-DC conversion switch 203 and 3 connecting pin of alternating current circuit It is connected to the AC fuse 303 of alternating current circuit 3 Yu 204 connection line of tractive transformer；

Direct current circuit protector part includes being connected to DC circuit 4 and close to AC-DC conversion switch 203 and DC circuit 4 The direct current arrester 402 of connecting pin, the DC fuse 402 being connected on DC circuit 4 and be connected to DC circuit 4 with The high-speed circuit breaker 403 of 205 connection line of current transformer；

Way circuit protection device includes the vacuum circuit breaker 202 for being connected to 2 output end of alternating current-direct current pantograph, and the vacuum is disconnected Road device 202 in Alternating Current Power Supply can direct disjunction circuit, when direct current supply after 403 disjunction DC circuit of high-speed circuit breaker again Carry out disjunction.

Alternating current-direct current pantograph 2, network pressure mutual inductor 201, vacuum in the switching high-pressure system of alternating current-direct current disclosed in the present embodiment Breaker 202, traction convertor 205 and traction electric machine 206 select Alternating Current Power Supply or direct current by AC-DC conversion switch 203 Power supply.

When Alternating Current Power Supply, trailer system is made of tractive transformer 204, traction convertor 205 and traction electric machine 206, Wherein realized under malfunction by the AC fuse 303 (high-tension fuse) of 204 front end of tractive transformer when direct current string Enter the protection in alternating current circuit 3；

When direct current supply, trailer system is by high-speed circuit breaker 403, direct current reactor 404, traction convertor 205 and leads Draw the composition of motor 206, wherein realizing under fault condition by 401 gap discharge of direct current arrester when alternating current seals in DC circuit Protection in 4.

Through above-mentioned each circuit brake while separately protected alternating current circuit 3 or DC circuit 4 are powered, moreover it is possible to Enough protections to avoiding non-designated supply current to seal in power supply circuit in AC-DC Circuit conversion process, improve safety and can By property.