WO2019100917A1

WO2019100917A1 - Train power supply circuit

Info

Publication number: WO2019100917A1
Application number: PCT/CN2018/112886
Authority: WO
Inventors: 廖洪涛; 彭新平; 邹焕青; 李辉
Original assignee: 中车株洲电力机车有限公司
Priority date: 2017-11-27
Filing date: 2018-10-31
Publication date: 2019-05-31
Also published as: CN107895944A; CN107895944B

Abstract

A train power supply circuit comprises a first train power supply cabinet (1) and a carriage power supply circuit (2). The first train power supply cabinet (1) comprises a first power source (11) and a first output port (12) both connected by a first contactor (KM1), a second power source (13) and a second output port (14) both connected by a second contactor (KM2), and a third contactor (KM3) connected to the first contactor (KM1) and the second contactor (KM2). The carriage power supply circuit (2) comprises a first loop (21) connected to the first output port (12) and a second loop (22) connected to the second output port (14). When the first loop (21) and the second loop (22) are in an independent power supply state, the first contactor (KM1) and the second contactor (KM2) are switched on and the third contactor (KM3) is switched off. The application of the train power supply circuit to an electric multiple unit can achieve different power supply modes through different states of switching.

Description

Train power supply circuit

Technical field

The invention relates to the field of rail transit, and in particular to a train power supply circuit.

Background technique

At present, the power-concentrated EMUs have the characteristics of flexible grouping. The number of power vehicles configured according to different grouping modes can be divided into short grouping and long grouping. Among them, the short group consists of a power car + a trailer + control car with no more than seven knots, and a long group consists of a power car + 8 to 16 trailers + power cars. In order to ensure the reliable use of the trailer car, regardless of the grouping mode, it is hoped that the power car can provide two independent train power supplies under normal working conditions, that is, in the case of a train power supply failure, the train can also Powered by another power source. However, in the prior art, once the power supply voltage of the train is faulty, the power supply circuit cannot be powered by other power sources, and the power supply requirement cannot be met.

Summary of the invention

In view of this, it is an object of the present invention to provide a train power supply circuit that satisfies a variety of power supply requirements. The specific plan is as follows:

A train power supply circuit includes a first column of power supply cabinets and a trailer power supply circuit, wherein:

The first column power supply cabinet includes:

a first power source and a first output port connected by the first contactor;

a second power source and a second output port connected by the second contactor;

a third contactor connecting the first contactor and the second contactor;

The trailer power supply circuit includes:

a first loop connected to the first output port;

a second loop connected to the second output port;

When the first loop and the second loop are in an independent power supply state, the first contactor and the second contactor are closed, and the third contactor is disconnected.

Preferably, the train power supply circuit comprises:

a first end of the third contactor is connected to a connection point between the first contactor and the first output port, and a second end of the third contactor is connected to the second contactor and a The connection point between the second output ports.

Preferably, the train power supply circuit comprises:

When the first power source fails, the first contactor and the third contactor are disconnected;

When the second power source fails, the second contactor and the third contactor are disconnected.

Preferably, the train power supply circuit comprises:

When the first power source fails, the first contactor is disconnected, and the third contactor is closed;

When the second power source fails, the second contactor opens and the third contactor closes.

Preferably, the train power supply circuit comprises:

a first end of the third contactor is connected to a connection point between the first contactor and the first output port, and a second end of the third contactor is connected to the second contactor and a The connection point between the second power sources.

Preferably, the train power supply circuit further includes a first auxiliary load and a second auxiliary load which are all connected by Y, wherein:

The first end and the second end of the first auxiliary load are respectively connected to two ports of the first power source, and the third end of the first auxiliary load is grounded;

The first end and the second end of the second auxiliary load are respectively connected to two ports of the second power source, and the third end of the second auxiliary load is grounded through the fourth contactor;

Wherein, when the second loop is independently powered by the second power source, the fourth contactor is closed.

Preferably, when the first power source fails, the first contactor and the third contactor are disconnected, and the second contactor and the fourth contactor are closed;

When the second power source fails, the second contactor and the third contactor are disconnected, and the first contactor and the fourth contactor are closed.

Preferably, when the first power source fails, the first contactor is disconnected, and the second contactor, the third contactor, and the fourth contactor are all closed;

When the second power source fails, the fourth contactor is turned off, and the first contactor, the second contactor, and the third contactor are all closed.

Preferably, the train power supply circuit further comprises a second column power supply cabinet having the same structure as the first column power supply cabinet, wherein:

The first output port and the second output port of the first power supply cabinet are respectively connected to the first end of the first circuit and the first end of the second circuit;

The first output port and the second output port of the second column of the power supply cabinet are respectively connected to the second end of the second circuit and the second end of the first circuit;

When the first loop and the second loop are in an independent power supply state, in the first column power supply cabinet: the first contactor and the third contactor are closed, and the second contactor and the fourth contactor are disconnected The switch state in the second column of the power supply cabinet is the same as that in the first column power supply cabinet.

Preferably, when any of the first power supply failures in the power supply cabinet is present, the current column is in the power supply cabinet:

The first contactor and the second contactor are disconnected, and the third contactor and the fourth contactor are closed;

When the second power supply in any of the power supply cabinets fails, the current column is in the power cabinet:

The second contactor and the third contactor are disconnected, and the first contactor and the fourth contactor are closed.

The invention discloses a train power supply circuit, comprising a first column power supply cabinet and a trailer power supply circuit, wherein: the first column power supply cabinet comprises: a first power source and a first output port connected through the first contactor; a second power source and a second output port connected by the second contactor; a third contactor connecting the first contactor and the second contactor; the trailer power supply circuit comprising: the first output port a first loop connected; a second loop connected to the second output port. When the first loop and the second loop are in an independent power supply state, the first contactor and the second contactor are closed, and the third contactor is disconnected. The train power supply circuit of the invention is applied to the EMU, and the power supply of different power supply modes can be realized through different states of the switch. One of the typical power supply modes is independent power supply of the two power vehicles. When one power supply fails, it does not affect another. The normal operation of the power supply all the way.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can obtain other drawings according to the provided drawings without any creative work.

1 is a structural distribution diagram of a train power supply circuit according to an embodiment of the present invention;

2 is a structural distribution diagram of a specific train power supply circuit according to an embodiment of the present invention;

3 is a structural distribution diagram of another specific train power supply circuit according to an embodiment of the present invention;

FIG. 4 is a structural diagram of another specific train power supply circuit according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The embodiment of the invention discloses a train power supply circuit. As shown in FIG. 1 , the first column includes a power supply cabinet 1 and a trailer power supply circuit 2, wherein:

The first column power supply cabinet 1 includes:

a first power source 11 and a first output port 12 connected by a first contactor KM1;

a second power source 13 and a second output port 14 connected by a second contactor KM2;

a third contactor KM3 connecting the first contactor KM1 and the second contactor KM2;

There may be a plurality of specific location connections between KM1, KM2, and KM3, which are not limited in this embodiment. For the specific connection manner, refer to the following embodiments.

The trailer power supply circuit 2 includes:

a first loop 21 connected to the first output port 12;

A second loop 22 connected to the second output port 14.

It can be understood that the present embodiment is applied to the short grouping mode. Generally, the first power source 11 and the second power source 13 are both AC/DC power supply units, and the first loop 21 and the second loop 22 are juxtaposed independently on the trailer. A DC600V power supply circuit.

When the first circuit 21 and the second circuit 22 are in an independent power supply state, the first contactor KM1 and the second contactor KM2 are closed, and the third contactor KM3 is turned off.

In addition, KM1, KM2, KM3 can also have other switch combinations to achieve different power supply modes to meet the different needs of the trailer power supply circuit 2, such as cutting off the power supply circuit of the power supply in the event of a power failure, or cutting off the faulty power supply. Powering the power supply circuit of the original faulty power supply with another power source.

The embodiment of the invention discloses a specific train power supply circuit. Compared with the previous embodiment, the technical solution is further illustrated and optimized in this embodiment. See Figure 2, specific:

a first end of the third contactor KM3 is connected to a connection point between the first contactor KM1 and the first output port 12, and a second end of the third contactor KM3 is connected to the second end A connection point between the contactor KM2 and the second output port 14.

It is to be understood that the other circuits in this embodiment are not limited herein. For reference, the specific content of the train power supply circuit in the prior art may be referred to, and a corresponding auxiliary circuit or the like is added in this embodiment.

The power supply circuit at this time has three power supply modes, one is independent power supply of two circuits, similar to the above embodiment, the first contactor KM1 and the second contactor KM2 are closed, the third contact KM3 is disconnected; one is to cut off the faulty power supply and stop supplying power to the power supply loop; and the other is to replace the faulty power supply with another power supply to supply power to the power supply loop.

Specifically, the states of the contactors in the second power supply mode are:

When the first power source fails, the first contactor KM1 and the third contactor KM3 are disconnected;

When the second power source fails, the second contactor KM2 and the third contactor KM3 are disconnected.

Specifically, the states of the contactors in the third power supply mode are:

It can be understood that, in fact, the connection circuits of the first power source 11 and the second power source 13 are symmetric, and the specific switches described above also have a certain correspondence relationship. It can be seen that in the same power supply mode, the first power source 11 is faulty. The processing means corresponds to the processing means for the failure of the second power source 13.

The embodiment of the invention discloses a specific train power supply circuit. Compared with the previous embodiment, the technical solution is further illustrated and optimized in this embodiment. See Figure 3, specific:

a first end of the third contactor KM3 is connected to a connection point between the first contactor KM1 and the first output port 12, and a second end of the third contactor KM3 is connected to the second end A connection point between the contactor KM2 and the second power source 13.

Compared with the previous embodiment, in this embodiment, the second contactor KM2 is moved outward relative to the third contactor KM3, so that the current passed by the second contactor KM2 is greatly reduced compared with the previous embodiment, so that the ratio can be selected. In one embodiment, the contactor with lower current requirements and the physical volume of the contactor are significantly reduced, which can save space.

The first end and the second end of the first auxiliary load 15 are respectively connected to two ports of the first power source 11, and the third end of the first auxiliary load is grounded;

The first end and the second end of the second auxiliary load 16 are respectively connected to two ports of the second power source 13, and the third end of the second auxiliary load is grounded through the fourth contactor KM4;

Wherein, when the second loop is independently powered by the second power source, the fourth contactor KM4 is closed.

It can be understood that the Y-connected auxiliary circuit added in this embodiment is for assisting the power supply and improving the stability of the train power supply circuit. The reason why the fourth contactor KM4 is added is to consider the voltage difference between the two power sources. If the first auxiliary load 15 and the second auxiliary load 16 are still grounded when the two power lines are connected, it is possible This causes a pressure difference between the two power supply circuits, which we try to avoid. Therefore, in order to eliminate such a pressure difference, an optional grounding mode is provided for the second auxiliary load, and the fourth contactor KM4 is turned off when it is not necessary to be grounded.

Similar to the above embodiment, the train power supply circuit of the embodiment also has multiple power supply modes, one is independent power supply of the two circuits, similar to the above embodiment, the first contactor KM1 and the second contactor KM2 is closed, and the third contactor KM3 is disconnected; one is to cut off the faulty power supply and stop supplying power to the power supply loop; and the other is to replace the faulty power supply with another power source to supply power to the power supply loop.

Specifically, when the first two-way circuit is independently powered, the first contactor KM1, the second contactor KM2, and the fourth contactor KM4 are all closed, and the third contactor KM3 is disconnected; at this time, the two power supplies are independent, and there is no pressure. Poor, so the fourth contactor KM4 needs to be closed.

Specifically, the specific switch state of the second type of faulty power supply is:

When the first power source 11 fails, the first contactor KM1 and the third contactor KM3 are disconnected, and the second contactor KM2 and the fourth contactor KM4 are closed;

When the second power source 13 fails, the second contactor KM2 and the third contactor KM3 are disconnected, and the first contactor KM1 and the fourth contactor KM4 are closed.

At this time, the two power supply circuits are symmetrically different from the above embodiments, but in fact, the two power supplies are still in an independent state, and the mutual influence is not required, so that the fourth contactor KM4 is closed, and the switching states of the other contactors are implemented. The example is similar.

Specifically, the specific switch state of the third replacement faulty power supply is:

When the first power source 11 fails, the first contactor KM1 is disconnected, and the second contactor KM2, the third contactor KM3, and the fourth contactor KM4 are both closed;

When the second power source 13 fails, the fourth contactor KM4 is turned off, and the first contactor KM1, the second contactor KM2, and the third contactor KM3 are all closed.

Different from the two power supply circuits in the above embodiment, the first power source 11 and the second power source 13 have different fault handling modes, and the corresponding switch states are also uncorresponding. Since part of the circuits of the first power source 11 and the second power source 13 are connected via the third contactor KM3, the voltage difference between the two circuits is considered, so that the switching state of the fourth contactor KM4 is particularly noted.

The embodiment of the invention discloses a specific train power supply circuit. Compared with the previous embodiment, the technical solution is further illustrated and optimized in this embodiment. See Figure 4, specific:

The train power supply circuit further includes a second column power supply cabinet 3 having the same structure as the first column power supply cabinet 1, wherein:

The first output port 12 and the second output port 14 of the first power supply cabinet 1 are respectively connected to the first end of the first circuit 21 and the first end of the second circuit 22;

The first output port 31 and the second output port 32 of the second power supply cabinet 3 are respectively connected to the second end of the second circuit 22 and the second end of the first circuit 21.

The train power supply circuit in this embodiment is applied to the long grouping mode, wherein the trailer has a power supply cabinet for power supply to the trailer power supply circuit.

Specifically, each contactor has a different switch state according to different power supply modes. It can be understood that since the first column power supply cabinet 1 and the second column power supply cabinet 3 have the same structure, the switch ideas are similarly corresponding.

In the independent power supply mode, when the first loop and the second loop are in an independent power supply state, in the first column power supply cabinet 1: the first contactor KM1 and the third contactor KM3 are closed, and the second The contactor KM2 and the fourth contactor KM4 are disconnected; the state of the three switches in the second column of the power supply cabinet is the same as that in the first column of the power supply cabinet 1.

It can be understood that at this time, the first power supply in the first column of the power supply cabinet 1 supplies power to the first circuit 21 at the same time, and the second power supply in the second power supply cabinet 2 simultaneously supplies power to the second circuit 22, The primary circuit 21 and the second circuit 22 are completely independent of each other.

In a mode of power failure, the specific:

When the first power supply in any of the power cabinets fails, the current column is in the power cabinet:

It can be understood that the first column of the power supply cabinet 1 and the second column of the power supply cabinet 3 are handled in the same manner. For details of the specific contactor, refer to the third embodiment, and details are not described herein again.

Finally, it should also be noted that in this context, relational terms such as first and second are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these entities. There is any such actual relationship or order between operations. Furthermore, the term "comprises" or "comprises" or "comprises" or any other variations thereof is intended to encompass a non-exclusive inclusion, such that a process, method, article, or device that comprises a plurality of elements includes not only those elements but also Other elements, or elements that are inherent to such a process, method, item, or device. An element that is defined by the phrase "comprising a ..." does not exclude the presence of additional equivalent elements in the process, method, item, or device that comprises the element.

The above is a detailed description of a train power supply circuit provided by the present invention. The principles and embodiments of the present invention are described herein using specific examples. The description of the above embodiments is only for helping to understand the method of the present invention and At the same time, there will be changes in the specific embodiments and the scope of application according to the idea of the present invention, and the contents of the present specification should not be construed as limiting the present invention. .

Claims

A train power supply circuit characterized by comprising a first column for a power supply cabinet and a trailer power supply circuit, wherein:

The first column power supply cabinet includes:

a first power source and a first output port connected by the first contactor;

a second power source and a second output port connected by the second contactor;

a third contactor connecting the first contactor and the second contactor;

The trailer power supply circuit includes:

a first loop connected to the first output port;

a second loop connected to the second output port;

When the first loop and the second loop are in an independent power supply state, the first contactor and the second contactor are closed, and the third contactor is disconnected.
The train power supply circuit according to claim 1, comprising:

a first end of the third contactor is connected to a connection point between the first contactor and the first output port, and a second end of the third contactor is connected to the second contactor and a The connection point between the second output ports.
The train power supply circuit according to claim 2, comprising:

When the first power source fails, the first contactor and the third contactor are disconnected;

When the second power source fails, the second contactor and the third contactor are disconnected.
The train power supply circuit according to claim 2, comprising:

When the first power source fails, the first contactor is disconnected, and the third contactor is closed;

When the second power source fails, the second contactor opens and the third contactor closes.
The train power supply circuit according to claim 1, comprising:

a first end of the third contactor is connected to a connection point between the first contactor and the first output port, and a second end of the third contactor is connected to the second contactor and a The connection point between the second power sources.
The train power supply circuit according to claim 5, further comprising a first auxiliary load and a second auxiliary load that are both Y-connected, wherein:

The first end and the second end of the first auxiliary load are respectively connected to two ports of the first power source, and the third end of the first auxiliary load is grounded;

The first end and the second end of the second auxiliary load are respectively connected to two ports of the second power source, and the third end of the second auxiliary load is grounded through the fourth contactor;

Wherein, when the second loop is independently powered by the second power source, the fourth contactor is closed.
A train power supply circuit according to claim 6 wherein:

When the first power source fails, the first contactor and the third contactor are disconnected, and the second contactor and the fourth contactor are closed;

When the second power source fails, the second contactor and the third contactor are disconnected, and the first contactor and the fourth contactor are closed.
A train power supply circuit according to claim 6 wherein:

When the first power source fails, the first contactor is disconnected, and the second contactor, the third contactor, and the fourth contactor are all closed;

When the second power source fails, the fourth contactor is turned off, and the first contactor, the second contactor, and the third contactor are all closed.
The train power supply circuit according to claim 6, further comprising a second power supply cabinet having the same structure as said first power supply cabinet, wherein:

The first output port and the second output port of the first power supply cabinet are respectively connected to the first end of the first circuit and the first end of the second circuit;

The first output port and the second output port of the second column of the power supply cabinet are respectively connected to the second end of the second circuit and the second end of the first circuit;

When the first loop and the second loop are in an independent power supply state, in the first column power supply cabinet: the first contactor and the third contactor are closed, and the second contactor and the fourth contactor are disconnected The switch state in the second column of the power supply cabinet is the same as that in the first column power supply cabinet.
The train power supply circuit according to claim 9, comprising:

When the first power supply in any of the power cabinets fails, the current column is in the power cabinet:

The first contactor and the second contactor are disconnected, and the third contactor and the fourth contactor are closed;

When the second power supply in any of the power supply cabinets fails, the current column is in the power cabinet:

The second contactor and the third contactor are disconnected, and the first contactor and the fourth contactor are closed.