WO2020155629A1 - 一种库用供电保护系统 - Google Patents
一种库用供电保护系统 Download PDFInfo
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- WO2020155629A1 WO2020155629A1 PCT/CN2019/104894 CN2019104894W WO2020155629A1 WO 2020155629 A1 WO2020155629 A1 WO 2020155629A1 CN 2019104894 W CN2019104894 W CN 2019104894W WO 2020155629 A1 WO2020155629 A1 WO 2020155629A1
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- contactor
- library
- power supply
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- coil
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- the invention relates to the field of rail transit, in particular to a power supply protection system for warehouses.
- the purpose of the present invention is to provide a power supply protection system for a library to improve the safety of power supply.
- the specific plan is as follows:
- a power supply protection system for warehouses applied to the field of rail transit, including: three-phase busbars, three-phase power lines, auxiliary transformer contactors, and warehouse contactors; wherein, the three-phase busbars are power supply buses connecting each carriage ,
- the three-phase power line is a line connecting the three-phase bus bar, electrical equipment and library sockets;
- the coil of the auxiliary transformer contactor is controlled by an auxiliary inverter located on the three-phase bus, and when the auxiliary inverter is energized, the coil of the auxiliary transformer contactor is controlled to be energized;
- the normally open contact of the auxiliary variable contactor is connected to the output terminal of the auxiliary inverter, and the normally open contact of the auxiliary variable contactor is used to control the auxiliary inverter and the three-phase bus Connection with the three-phase power circuit for the library;
- the input normally open contact of the library contactor is connected to the library socket, and the input normally open contact of the library contactor is used to control the library socket and the three-phase bus and the Connection of electrical equipment;
- the normally open contact of the auxiliary variable contactor located on the three-phase bus is connected to the input normally open contact of the library contactor through the three-phase power line;
- An interlock circuit is connected across any two phases of the three-phase power circuit between the input normally open contact of the library contactor and the library socket;
- the interlock circuit includes a coil of the library contactor and a normally closed contact of the auxiliary variable contactor connected in series.
- it further includes a first contact of the library contactor connected to the TCMS;
- the first contact of the library contactor is used to enable the TCMS to display the prompt information of the library socket for power supply after the library contactor is activated.
- the interlock circuit and the socket for the library are connected through a protection switch for the library.
- it further includes a first normally closed contact of the library contactor connected to the vehicle main circuit breaker control loop;
- the first normally closed contact of the storage contactor is used to disable the control loop of the vehicle main circuit breaker after being disconnected.
- it further includes a bus AC detection relay for detecting whether the three-phase bus is live;
- the coil of the busbar AC detection relay is connected across any two phases of the three-phase busbar, and the coil of the busbar AC detection relay is arranged between the three-phase power line and the electrical equipment of the remaining carriages;
- the coil of the library contactor and the normally closed contact of the auxiliary variable contactor are connected in parallel with the normally closed contact of the busbar AC detection relay and the library contact Keep normally open contact of the device;
- the normally closed contact of the busbar AC detection relay is used to control whether the coil of the library contactor can be energized.
- it further includes a second contact of the library contactor connected to an external power supply control circuit;
- the first contact of the library contactor is used to make the external power supply control circuit unable to activate the external power supply after being disconnected.
- it further includes a second normally closed contact of the library contactor connected to the coil of the auxiliary variable contactor;
- the second normally closed contact of the contactor for the library is used to control the coil of the auxiliary variable contactor to be energized.
- the storage power supply protection system is applied to the rail transit field, and includes: three-phase bus, three-phase power line, auxiliary transformer contactor, and storage contactor; among them, the three-phase bus is the power supply bus connecting each car ,
- the three-phase power line is the line that connects the three-phase bus, the electrical equipment and the library socket; the coil of the auxiliary change contactor is controlled by the auxiliary inverter located on the three-phase bus.
- the coil of the variable contactor is energized; the normally open contact of the auxiliary variable contactor is connected to the output terminal of the auxiliary inverter, and the normally open contact of the auxiliary variable contactor is used to control the auxiliary inverter and the three-phase bus and library Connect with three-phase power lines; the input normally open contact of the library contactor is connected to the library socket, and the input normally open contact of the library contactor is used to control the library socket and the three-phase bus and electrical equipment Connection; the normally open contact of the auxiliary variable contactor on the three-phase bus is connected to the input normally open contact of the library contactor through the three-phase power line; the input normally open contact of the library contactor is connected to the library An interlocking circuit is connected across any two phases of the three-phase power circuit between the sockets; the interlocking circuit includes the coil of the library contactor in series and the normally closed contact of the auxiliary variable contactor.
- the present invention is provided on the three-phase wire circuit with the input normally open contact of the library contactor and the interlock circuit including the coil of the library contactor in series and the normally closed contact of the auxiliary variable contactor.
- the coil of the auxiliary transformer contactor is set in the three-phase bus, and the normally open contact of the auxiliary transformer contactor is set on the three-phase bus.
- the coil and the normally open contact of the auxiliary transformer contactor are used to control whether the auxiliary inverter can be connected to the three-phase bus and Three-phase power line, use the coil of the library contactor and input normally open contact to control whether the library socket can be connected to the three-phase bus and three-phase power line, combined with the interlock circuit, when the external power supply is supplied, the auxiliary transformer contacts
- the coil of the converter is energized, and the normally closed contact of the auxiliary variable contactor is disconnected, ensuring that the input normally open contact of the library contactor cannot be closed, ensuring that there can only be one power supply mode at the same time, and ensuring that multiple power sources will not appear at the same time The power supply situation.
- Figure 1 is a schematic structural diagram of a power supply protection system for a library disclosed in an embodiment of the present invention
- Figure 2 is a schematic structural diagram of another power supply protection system for a library disclosed in an embodiment of the present invention.
- FIG. 3 is a schematic structural diagram of another power supply protection system for a library disclosed in an embodiment of the present invention.
- Figure 4 is a schematic structural diagram of another power supply protection system for a library disclosed in an embodiment of the present invention.
- Figure 5 is a schematic structural diagram of another power supply protection system for a library disclosed in an embodiment of the present invention.
- the embodiment of the present invention discloses a power supply protection system for a library. As shown in FIG. 1, it is applied to the field of rail transit and includes: a three-phase bus, a three-phase power line, an auxiliary transformer contactor K3, and a library contactor K2; Among them, the three-phase bus is the power supply bus that connects each car, and the three-phase power line is the line that connects the three-phase bus, the electrical equipment 3 and the library socket 2;
- the coil of the auxiliary transformer contactor K3 is controlled by the auxiliary inverter 1 on the three-phase bus.
- the coil of the auxiliary transformer contactor K3 is energized;
- the normally open contact of the auxiliary variable contactor K3 is connected to the output terminal of the auxiliary inverter 1, and the normally open contact of the auxiliary variable contactor K3 is used to control the auxiliary inverter 1 and the three-phase bus and the three-phase of the library The connection of electric lines;
- the input normally open contact of the library contactor K2 is connected to the library socket 2, and the input normally open contact of the library contactor K2 is used to control the connection between the library socket 2 and the three-phase bus and electrical equipment 3;
- the normally open contact of the auxiliary variable contactor K3 on the three-phase bus is connected to the input normally open contact of the library contactor K2 through the three-phase power line;
- An interlock circuit 7 is connected across any two phases of the three-phase power circuit between the input normally open contact of the library contactor K2 and the library socket 2;
- the interlock circuit 7 includes the coil of the library contactor K2 and the normally closed contact of the auxiliary variable contactor K3 connected in series.
- each car of the train is connected by a three-phase bus, and each car is connected to each other through a three-phase bus.
- the auxiliary inverter 1 is used to connect to the external power supply 4, so that the train can be supplied with external power.
- the library socket 2 is used to connect to the power supply for the library, so that the train is energized by the power supply of the library. After one car is energized, all the other cars are energized through the three-phase bus.
- the power of each car is
- the equipment 3 is connected to the three-phase bus through the secondary power line, that is, the three-phase power line.
- the three-phase power line of each carriage is used to connect the electrical equipment 3, library socket 2 and three-phase of each carriage. Busbar.
- the coil of the auxiliary transformer contactor K3 is controlled by the auxiliary inverter 1. After the auxiliary inverter 1 is connected to the external power supply 4, the train enters the external power supply state. At this time, the auxiliary inverter 1 will make the auxiliary transformer The coil of the contactor K3 is energized to prompt the corresponding contacts of the auxiliary transformer contactor K3 to act.
- the coil of the auxiliary transformer contactor K3 can be set at the output terminal of the auxiliary inverter 1, that is, the auxiliary inverter 1 and the three-phase bus connection terminal , So as to ensure that after the auxiliary inverter 1 outputs power, the coil of the auxiliary transformer contactor K3 can be energized immediately.
- the coil of the auxiliary transformer contactor K3 can be installed inside the auxiliary inverter 1, and the auxiliary inverter 1 Directly control whether the coil of the auxiliary transformer contactor K3 can be energized, which is equivalent to the auxiliary inverter 1 as the coil of the auxiliary transformer contactor K3, and controls the corresponding contact action of the auxiliary transformer contactor K3.
- the coil is installed inside the auxiliary inverter 1. When the auxiliary inverter 1 is energized, the coil of the auxiliary transformer contactor K3 will also be energized, and the corresponding contacts of the auxiliary transformer contactor K3 will act.
- auxiliary inverter 1 controls the coil of the auxiliary transformer contactor K3 to be energized, it can also be judged through other protection conditions to determine whether the coil of the auxiliary transformer contactor K3 can be energized and enter the external power supply mode.
- the normally open contact of the auxiliary variable contactor K3 is adjacent to the output terminal of the auxiliary inverter 1, and the normally open contact of the auxiliary variable contactor K3 is located at the output terminal of the auxiliary inverter 1 and the three-phase power line and other Car 6 is between the electrical equipment 3 of the three-phase bus, and the normally open contact of the auxiliary variable contactor K3 is used to control the output of the auxiliary inverter 1 and the three-phase power line and the rest of the cars 6 on the three-phase bus.
- the normally open contact of the auxiliary transformer contactor K3 is in an open state, and the output terminal of the auxiliary inverter 1 is disconnected from the three-phase power supply.
- the line and the remaining carriages 6 are connected between the electrical equipment 3 on the three-phase bus, and the auxiliary inverter 1 is prohibited from inputting external power to the three-phase electrical circuit and the electrical equipment 3 of the remaining carriages 6 on the three-phase bus.
- External power supply prevents the train from entering the external power supply state through the auxiliary inverter 1 of the current carriage 5.
- the normally open and closed of the auxiliary transformer contactor K3 makes the auxiliary inverter 1
- the output end is connected with the three-phase power line and the other cars 6 between the power equipment 3 of the three-phase bus, so that the external power supply is input to the three-phase power line and the three-phase bus through the auxiliary inverter 1, so that the current car 5 Enter the external power supply state.
- the input normally open contact of the library contactor K2 is located on the three-phase wire circuit, and is used to isolate the library socket 2 from the electrical equipment 3 on the three-phase wire circuit and the three-phase bus.
- the input normally open contact of the warehouse contactor K2 disconnects the connection between the warehouse socket 2 and the three-phase power line, so that the train cannot enter through the warehouse socket 2 of the current car 5.
- the coil of the library contactor K2 is energized, the input normally open contact of the library contactor K2 is closed, and the connection between the library socket 2 and the three-phase bus is established, and the electrical equipment 3 is used to get power.
- the current carriage 5 enters the power supply state for the library.
- an interlock circuit 7 is provided for this purpose, and the interlock circuit 7 is connected across Between any two phases of the three-phase power circuit between the input normally open contact of the library contactor K2 and the library socket 2, when the interlock circuit 7 is turned on and the library socket 2 supplies power, the interlock circuit 7
- the interlock circuit 7 includes the coil of the library contactor K2 and the normally closed contact of the auxiliary transformer contactor K3 in series.
- the coil of the auxiliary transformer contactor K3 When the external power is not supplied, the coil of the auxiliary transformer contactor K3 will not be energized, so , The normally closed contact of the auxiliary transformer contactor K3 is kept closed, so that the interlock circuit 7 is turned on. At this time, if the library socket 2 is connected to the library power supply, the coil of the library contactor K2 will be energized.
- the input normally open contact of the contactor K2 will be closed, so that the warehouse socket 2 and the three-phase electric circuit are connected, and the train enters the warehouse power supply mode; at this time, if there is an external power supply 4 and an auxiliary inverter 1 Connected to make the coil of the auxiliary transformer contactor K3 energized, the normally closed contact of the auxiliary transformer contactor K3 in the interlock circuit 7 will be disconnected, causing the coil of the library contactor K2 to lose power, causing the library to use
- the input normally open contact of the contactor K2 is disconnected, which disconnects the library socket 2 from the three-phase power line, thereby ensuring that only one power supply mode can exist, avoiding multiple power sources supplying power to the train at the same time, forming an interlock .
- the embodiment of the present invention provides an interlock between the input normally open contact of the library contactor K2 and the coil of the library contactor K2 connected in series and the normally closed contact of the auxiliary variable contactor K3 on the three-phase wire circuit.
- Circuit 7, the coil of the auxiliary variable contactor K3 is set in the auxiliary inverter 1, the normally open contact of the auxiliary variable contactor K3 is set on the three-phase bus, and the coil and the normally open contact of the auxiliary variable contactor K3 are used for control Whether the auxiliary inverter 1 can be connected to the three-phase bus and three-phase power lines, and whether the coil of the library contactor K2 and the input normally open contact control the library socket 2 can be connected to the three-phase bus and three-phase power lines.
- the embodiment of the present invention discloses a specific power supply protection system for a library. Compared with the previous embodiment, this embodiment further illustrates and optimizes the technical solution. specific:
- each car of the train is connected to each other through a three-phase bus, and there may be multiple cars of the train equipped with the socket 2 for storage, it is possible that the socket 2 for storage of the current car 5 is not energized, but The warehouse socket 2 of the remaining carriages 6 has been connected to the warehouse power supply, so that the three-phase bus and three-phase power lines of the entire train are charged.
- the current carriage 5 is energized through the warehouse socket 2 again, there will be more In the case of two power sources supplying power at the same time, as shown in Figure 2, in order to avoid this situation, it also includes a bus AC detection relay K1 for detecting whether the three-phase bus is live.
- the coil of the busbar AC detection relay K1 is connected across any two phases of the three-phase bus.
- the coil of the busbar AC detection relay K1 needs to flow in the current direction of the remaining cars 6
- the current is detected before the three-phase power line of the current carriage 5, therefore, the coil of the busbar AC detection relay K1 is set between the three-phase power line and the electrical equipment 3 of the remaining carriages 6 to ensure that the current can flow from other cars.
- the current is detected in advance before the carriage enters the current carriage 5.
- the coil of the library contactor K2 in the interlock circuit 7 and the normally closed contact of the auxiliary variable contactor K3 are connected in parallel with the normally closed contacts of the busbar AC detection relay K1 and the library contactor K2.
- the normally open contact of the library contactor K2 connected in parallel with each other and the busbar AC detection relay K1 are normally open.
- the closed contacts are in a disconnected state, so that the coil of the library contactor K2 in the interlock circuit 7 cannot be energized, so as to ensure that no new library socket 2 is connected to the three-phase power line to ensure that the train does not There may be cases where multiple libraries use socket 2 to supply power at the same time.
- the external power supply may also include a library contact connected to the external power supply control circuit 8.
- the second contact of the library contactor K2; the second contact of the library contactor K2 is used to make the external power supply control circuit 8 unable to enable the external power supply after being disconnected; the second contact of the library contactor K2 can be normally open
- the contact may also be a normally closed contact.
- Fig. 3 only lists the case where the second contact of the library contactor K2 is a normally closed contact, which is not limited.
- the external power supply control circuit 8 is used to control the auxiliary inverter 1 to connect with the external power supply 4, and the second contact of the library contactor K2 controls the connection between the external power supply control circuit 8 and the power supply; for example, when The second contact of the library contactor K2 is a normally closed contact.
- the external power supply control circuit 8 works normally, and the user can make the external power supply control circuit through corresponding operations 8 Control the external power supply connection device to establish the connection between the external power supply 4 and the auxiliary inverter 1.
- the external power supply connection device can be a pantograph, and the external power supply control circuit 8 can control the pantograph to rise and connect to the external power supply 4.
- the external power supply control circuit 8 loses power and cannot work, and the user cannot control the external power supply control circuit 8 to control the external power supply connection device to establish external power supply
- the power supply 4 is connected to the auxiliary inverter 1. Therefore, when the library power supply mode is entered, the external power supply 4 cannot establish a connection with the auxiliary inverter 1, and the train cannot enter the external power supply mode, only when the library power supply mode ends , Can enter the external power supply mode, realize the interlock between the external power supply and the library power supply, and ensure that there can only be one power supply mode at the same time.
- the external power supply control circuit 8 may specifically be the power supply circuit of the pantograph solenoid valve 11, and the specific circuit may also include the pantograph solenoid valve 11, where the power supply circuit of the pantograph solenoid valve 11 and the second of the library contactor K2
- the specific connection relationship between the contacts and the pantograph solenoid valve 11 can be seen in FIG. 3.
- the external power supply control circuits 8 corresponding to different cars are the same, and the second contacts of the warehouse contactor K2 of each car are connected in series with the power supply circuit of the external power supply control circuit 8.
- the library uses socket 2 to supply power, the coil of the corresponding library contactor K2 is energized, and the second contact of the corresponding library contactor K2 is disconnected. This will make the entire train unable to achieve external power supply, ensuring that the train can only There is a power supply mode.
- the second contact of the library contactor K2 connected to the external power supply control circuit 8 ensures the interlocking of the two power supply modes of the train’s external power supply and the library power supply.
- the busbar AC detection relay K1 ensures that the train can only There is a library powered by socket 2.
- the train’s TCMS9 Train Control and Management System
- the power supply mode is used, and it can also be displayed which car's library socket 2 is supplying power.
- the first contact of the library contactor K2 connected to the TCMS9 can also be included.
- the first contact of the library contactor K2 is used when the first contact of the library contactor K2 is activated, so that TCMS9 displays the prompt information that the library socket 2 is powered; the first contact of the library contactor K2 A contact, by changing its working state, makes TCMS9 know that the corresponding library socket 2 starts to supply power.
- the first contact of the library contactor K2 is a normally closed contact, and the first contact of the library contactor K2 One end of the point can be connected to the power supply and the other end is connected to a control terminal of TCMS9.
- the connection is disconnected, and the control terminal of TCMS9 can detect the voltage disappearance, that is, from high level
- the TCMS9 can use the display installed in the train to display corresponding prompt information to inform the user that the library socket 2 is currently being powered.
- the first library contactor K2 The contact can also be a normally open contact.
- the connection is closed, and the control terminal of TCMS9 can detect the occurrence of voltage, that is, change from low to high , Thereby confirming that the library socket 2 starts to supply power.
- TCMS9 can know that the warehouse socket 2 of that car is powered according to the state changes of different control terminals.
- TCMS9 can be installed The display in the train displays a corresponding prompt message to inform the user that the library socket 2 of that car is currently supplying power, for example, displays the text message "the library socket of the fifth car is supplying power" to prompt the user.
- the interlock circuit 7 and the library socket 2 can be connected through the library protection switch F1 to further improve the safety of the circuit.
- the user is using the library Before the socket 2 supplies power, it is necessary to close the library protection switch F1 and disconnect the library protection switch F1 to stop the library socket 2 power supply.
- the library protection switch F1 can be an air switch.
- the load capacity of the external power supply 4 is wired.
- the load capacity of the power supply for the library is larger. Therefore, the vehicle circuit breaker 12 set for the load capacity of the external power supply 4 is convenient. It is not applicable to the situation of library power supply. Therefore, when the library power supply is used, the operation of the vehicle main circuit breaker control loop 10 can be suspended to ensure that the library power supply can exert maximum efficiency. See Figure 4, which can also include The first normally closed contact of the library contactor K2 connected to the vehicle main circuit breaker control loop 10; the first normally closed contact of the library contactor K2, used to make the vehicle main circuit breaker control loop after disconnection 10 failed.
- the circuit of the vehicle main circuit breaker control loop 10 and the first normally closed contact of the library contactor K2 may also include a circuit breaker 12, the vehicle main circuit breaker control loop 10, the library contactor K2 and the circuit breaker
- the specific connection relationship of 12 can be seen in Figure 4.
- the embodiment of the present invention also discloses another power supply mode interlocking structure of the power supply protection system for the library, as shown in FIG. 5, specifically: the power supply protection system for the library may also include a coil connected to the auxiliary transformer contactor K3
- the second normally closed contact of the library contactor K2 and the second normally closed contact of the library contactor K2 are used to control whether the coil of the auxiliary variable contactor K3 is energized, thereby controlling the normally open of the auxiliary variable contactor K3 Whether the contacts are closed or not can control whether the auxiliary inverter 1 can be connected with the three-phase bus and the three-phase power line for external power supply, and further realize the interlock between the library power supply and the external power supply.
- the second normally closed contact of the library contactor K2 will be in an open state.
- the auxiliary inverter 1 cannot The power is transmitted to the coil of the auxiliary transformer contactor K3.
- the auxiliary inverter 1 cannot control the coil of the auxiliary transformer contactor K3 to get power, and the normally open contact of the auxiliary transformer contactor K3 cannot be closed, resulting in the auxiliary inverter 1 also Electricity cannot be transmitted to the three-phase power circuit and to the remaining cars 6 through the three-phase bus.
- each warehouse socket 2 will be assisted by the auxiliary inverter 1.
- the second normally closed contact of the corresponding library contactor K2 is set in front of the coil of the variable contactor K3.
- the second normally closed contacts of each library contactor K2 are connected in series to ensure that any library uses socket 2 to supply power After that, the auxiliary inverters are unable to supply power.
- the train may have multiple carriages with the function of supplying power for the library, and each carriage has a corresponding interlock circuit 7.
- a carriage with the functions of external power supply and power supply for the library The power supply protection system can have the auxiliary transformer contactor K3, the library contactor K2, the busbar AC detection relay K1, the interlock circuit 7, and the first contact of the library contactor K2 connected to the external power supply control circuit 8; only Cars with the power supply function for the library may only have the corresponding library contactor K2, the corresponding busbar AC detection relay K1 and the corresponding interlock circuit 7.
- the normally closed contacts of the auxiliary transformer K3, that is, the auxiliary transformer contactor K3 in all the interlock circuits 7 in the train are controlled by the coil of the auxiliary transformer contactor K3 of the carriage with the functions of external power supply and library power supply.
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Abstract
一种库用供电保护系统，应用于轨道交通领域，在三相用电线路上设置库用接触器的输入常开触点和包括串联的库用接触器的线圈和辅变接触器的常闭触点的互锁电路，在辅助逆变器中设置辅变接触器的线圈，在三相母线上设置辅变接触器的常开触点，利用辅变接触器的线圈和常开触点控制辅助逆变器能否接入三相母线和三相用电线路，利用库用接触器的线圈和输入常开触点控制库用插座能否接入三相母线和三相用电线路，结合互锁电路，通过外部供电时，辅变接触器的线圈得电，辅变接触器的常闭触点断开，确保库用接触器的输入常开触点无法闭合，确保同一时间只能有一种供电模式，确保不会出现多种电源同时供电的情况。
Description
本申请要求于2019年01月31日提交中国专利局、申请号为201910098925.7、发明名称为“一种库用供电保护系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
本发明涉及轨道交通领域，特别涉及一种库用供电保护系统。
为获得车辆运营所需的高能量和高效率，轨道交通车辆往往采用高压受流方式，使用的最高电压达到了AC 25KV、电流达到了数百安培，由此而来的对于车辆、设备和人员的高压电伤害隐患一直困扰着车辆设计的安全性。特别是为了便于车辆回库的检修以及车辆长期停放严重馈电等特殊工况，车辆增设了库用供电模式。
如何避免各种供电模式同时发生时，不同电源同时接入车辆，导致相间短路引起的电器损坏、火灾甚至人员的伤亡，已成为当前轨道交通车辆安全运行的当务之急。
为此，提出一种库用供电保护系统，提高供电安全性。
发明内容
有鉴于此，本发明的目的在于提供一种库用供电保护系统，提高供电安全性。其具体方案如下：
一种库用供电保护系统，应用于轨道交通领域，包括：三相母线、三相用电线路、辅变接触器和库用接触器；其中，所述三相母线为连接各车厢的供电母线，所述三相用电线路为连接所述三相母线、用电设备和库用插座的线路；
所述辅变接触器的线圈由位于所述三相母线上的辅助逆变器控制，当所述辅助逆变器得电控制所述辅变接触器的线圈得电；
所述辅变接触器的常开触点与所述辅助逆变器的输出端相连，所述辅 变接触器的常开触点，用于控制所述辅助逆变器与所述三相母线和所述库用三相用电线路的连接；
所述库用接触器的输入常开触点与所述库用插座连接，所述库用接触器的输入常开触点，用于控制所述库用插座与所述三相母线和所述用电设备的连接；
位于所述三相母线上的所述辅变接触器的常开触点通过所述三相用电线路与所述库用接触器的输入常开触点相连；
所述库用接触器的输入常开触点与所述库用插座之间的所述三相用电线路的任意两相之间跨接有互锁电路；
所述互锁电路包括串联的所述库用接触器的线圈和所述辅变接触器的常闭触点。
可选的，还包括与TCMS连接的所述库用接触器的第一触点；
所述库用接触器的第一触点，用于当所述库用接触器动作后，以使所述TCMS显示所述库用插座供电的提示信息。
可选的，所述互锁电路与所述库用插座之间通过库用保护开关连接。
可选的，还包括与车辆主断路器控制环路连接的所述库用接触器的第一常闭触点；
所述库用接触器的第一常闭触点，用于断开后使所述车辆主断路器控制环路失效。
可选的，还包括用于检测所述三相母线上是否带电的母线交流检测继电器；
所述母线交流检测继电器的线圈跨接在所述三相母线的任意两相之间，所述母线交流检测继电器的线圈设置在所述三相用电线路与其余车厢的用电设备之间；
所述互锁电路中所述库用接触器的线圈与所述辅变接触器的常闭触点之间连接有相互并联的所述母线交流检测继电器的常闭触点和所述库用接触器的保持常开触点；
所述母线交流检测继电器的常闭触点，用于控制所述库用接触器的线圈是否能够得电。
可选的，还包括与外部供电控制电路连接的所述库用接触器的第二触点；
所述库用接触器的第一触点，用于断开后使所述外部供电控制电路无法启用外部供电。
可选的，还包括与所述辅变接触器的线圈相连的所述库用接触器的第二常闭触点；
所述库用接触器的第二常闭触点，用于控制所述辅变接触器的线圈得电。
本发明中，库用供电保护系统，应用于轨道交通领域，包括：三相母线、三相用电线路、辅变接触器和库用接触器；其中，三相母线为连接各车厢的供电母线，三相用电线路为连接三相母线、用电设备和库用插座的线路；辅变接触器的线圈由位于三相母线上的辅助逆变器控制，当辅助逆变器得电控制辅变接触器的线圈得电；辅变接触器的常开触点与辅助逆变器的输出端相连，辅变接触器的常开触点，用于控制辅助逆变器与三相母线和库用三相用电线路的连接；库用接触器的输入常开触点与库用插座连接，库用接触器的输入常开触点，用于控制库用插座与三相母线和用电设备的连接；位于三相母线上的辅变接触器的常开触点通过三相用电线路与库用接触器的输入常开触点相连；库用接触器的输入常开触点与库用插座之间的三相用电线路的任意两相之间跨接有互锁电路；互锁电路包括串联的库用接触器的线圈和辅变接触器的常闭触点。
本发明在三相用电线路上设置库用接触器的输入常开触点和包括串联的库用接触器的线圈和辅变接触器的常闭触点的互锁电路，在辅助逆变器中设置辅变接触器的线圈，在三相母线上设置辅变接触器的常开触点，利用辅变接触器的线圈和常开触点控制辅助逆变器能否接入三相母线和三相用电线路，利用库用接触器的线圈和输入常开触点控制库用插座能否接入三相母线和三相用电线路，结合互锁电路，通过外部供电时，辅变接触器的线圈得电，辅变接触器的常闭触点断开，确保库用接触器的输入常开触点无法闭合，确保同一时间只能有一种供电模式，确保不会出现多种电源同时供电的情况。
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据提供的附图获得其他的附图。
图1为本发明实施例公开的一种库用供电保护系统结构示意图；
图2为本发明实施例公开的另一种库用供电保护系统结构示意图；
图3为本发明实施例公开的另一种库用供电保护系统结构示意图；
图4为本发明实施例公开的另一种库用供电保护系统结构示意图；
图5为本发明实施例公开的另一种库用供电保护系统结构示意图；
其中，母线交流检测继电器—K1，库用接触器—K2，辅变接触器—K3，辅助逆变器—1，库用插座—2，用电设备—3，外部供电电源—4，当前车厢—5，其余车厢—6，互锁电路—7，外部供电控制电路—8，TCMS—9，车辆主断路器控制环路—10，受电弓电磁阀—11，车辆断路器—12。
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明实施例公开了一种库用供电保护系统，参见图1所示，应用于轨道交通领域，包括：三相母线、三相用电线路、辅变接触器K3和库用接触器K2；其中，三相母线为连接各车厢的供电母线，三相用电线路为连接三相母线、用电设备3和库用插座2的线路；
辅变接触器K3的线圈由位于三相母线上的辅助逆变器1控制，当辅助逆变器1得电控制辅变接触器K3的线圈得电；
辅变接触器K3的常开触点与辅助逆变器1的输出端相连，辅变接触器K3的常开触点，用于控制辅助逆变器1与三相母线和库用三相用电线路的连接；
库用接触器K2的输入常开触点与库用插座2连接，库用接触器K2的输入常开触点，用于控制库用插座2与三相母线和用电设备3的连接；
位于三相母线上的辅变接触器K3的常开触点通过三相用电线路与库用接触器K2的输入常开触点相连；
库用接触器K2的输入常开触点与库用插座2之间的三相用电线路的任意两相之间跨接有互锁电路7；
互锁电路7包括串联的库用接触器K2的线圈和辅变接触器K3的常闭触点。
可以理解的是，列车的每节车厢之间通过三相母线连通，每节车厢通过三相母线实现电力互通，辅助逆变器1用于与外部供电电源4连接，使列车通过外部供电的方式得电，库用插座2用于与库用电源连接，使列车通过库用供电的方式得电，一节车厢得电后，其余所有车厢通过三相母线均得电，每节车厢的用电设备3通过次级的用电线路即三相用电线路与三相母线相连，每节车厢的三相用电线路均用于连接每节车厢的用电设备3、库用插座2和三相母线。
具体的，辅变接触器K3的线圈由辅助逆变器1控制，在辅助逆变器1与外部供电电源4连接后，列车进入外部供电状态，此时，辅助逆变器1会使辅变接触器K3的线圈得电，促使辅变接触器K3相应的触点动作，辅变接触器K3的线圈可以设置在辅助逆变器1输出端，即辅助逆变器1与三相母线连接端，从而确保辅助逆变器1输出电力后，辅变接触器K3的线圈可以立即得电，进一步的，辅变接触器K3的线圈可以安装在辅助逆变器1的内部，辅助逆变器1直接控制辅变接触器K3的线圈能否得电，相当于辅助逆变器1自身作为辅变接触器K3的线圈，控制辅变接触器K3相应的触点动作，若辅变接触器K3的线圈安装在辅助逆变器1的内部，当辅助逆变器1得电后，其中的辅变接触器K3的线圈便也会相应得电，辅变接触器K3相应的触点便动作。
需要说明的是，辅助逆变器1控制辅变接触器K3的线圈得电前，还可以经由其它保护条件进行判断，判断是否可以使辅变接触器K3的线圈得电，进入外部供电模式。
进一步的，辅变接触器K3的常开触点紧邻辅助逆变器1的输出端，辅变接触器K3的常开触点位于辅助逆变器1的输出端与三相用电线路和其余车厢6在三相母线的用电设备3之间，辅变接触器K3的常开触点用于控制辅助逆变器1的输出端与三相用电线路和其余车厢6在三相母线的用电设备3之间连接，当辅变接触器K3的线圈未得电时，辅变接触器K3的常开触点处于打开状态，断开辅助逆变器1的输出端与三相用电线路和其余车厢6在三相母线的用电设备3之间连接，禁止辅助逆变器1将外部供电输入至三相用电线路和与三相母线上其余车厢6的用电设备3，切断外部供电，使列车无法通过当前车厢5的辅助逆变器1进入外部供电状态；当辅变接触器K3的线圈得电时，辅变接触器K3的常开开闭合使辅助逆变器1的输出端与三相用电线路和其余车厢6在三相母线的用电设备3之间连接，使外部供电通过辅助逆变器1输入至三相用电线路和三相母线上，使当前车厢5进入外部供电状态。
具体的，库用接触器K2的输入常开触点位于三相用电线路上，用于将库用插座2与三相用电线路上的用电设备3和三相母线隔离开，在库用接触器K2的线圈未得电前，库用接触器K2的输入常开触点断开库用插座2与三相用电线路的连接，使列车无法通过当前车厢5的库用插座2进入库用供电状态，当库用接触器K2的线圈得电后，库用接触器K2的输入常开触点闭合，建立库用插座2与三相母线的连接，使用电设备3得电，使当前车厢5进入库用供电状态。
具体的，为了实现外部供电与库用供电不会同时接入三相用电线路和三相母线，确保任意时刻只有一种供电电源，为此设置互锁电路7，互锁电路7跨接在库用接触器K2的输入常开触点与库用插座2之间的三相用电线路的任意两相之间，当互锁电路7导通且库用插座2供电时，互锁电路7便可得电，互锁电路7包括串联的库用接触器K2的线圈和辅变接触器K3的常闭触点，当外部未供电时，辅变接触器K3的线圈不会得电，因 此，辅变接触器K3的常闭触点保持闭合状态，使互锁电路7导通，此时，若库用插座2与库用电源连接，库用接触器K2的线圈将会得电，库用接触器K2的输入常开触点将会闭合，使库用插座2与三相用电线路导通，列车进入库用供电模式；此时，若有外部供电电源4与辅助逆变器1相连，使辅变接触器K3的线圈得电，则互锁电路7中的辅变接触器K3的常闭触点将会断开连接，使库用接触器K2的线圈失电，致使库用接触器K2的输入常开触点断开，使库用插座2与三相用电线路的连接断开，从而确保只能存在一种供电模式，避免多种电源同时对列车供电，形成互锁。
可见，本发明实施例在三相用电线路上设置库用接触器K2的输入常开触点和包括串联的库用接触器K2的线圈和辅变接触器K3的常闭触点的互锁电路7，在辅助逆变器1中设置辅变接触器K3的线圈，在三相母线上设置辅变接触器K3的常开触点，利用辅变接触器K3的线圈和常开触点控制辅助逆变器1能否接入三相母线和三相用电线路，利用库用接触器K2的线圈和输入常开触点控制库用插座2能否接入三相母线和三相用电线路，结合互锁电路7，通过外部供电时，辅变接触器K3的线圈得电，辅变接触器K3的常闭触点断开，确保库用接触器K2的输入常开触点无法闭合，确保同一时间只能有一种供电模式，确保不会出现多种电源同时供电的情况。
本发明实施例公开了一种具体的库用供电保护系统，相对于上一实施例，本实施例对技术方案作了进一步的说明和优化。具体的：
需要说明的是，由于列车的每个车厢均通过三相母线相互导通，且列车可能有多个车厢设置有库用插座2，因此，可能会当前车厢5的库用插座2未通电，但其余车厢6的库用插座2已与库用电源连接，使整个列车的三相母线和三相用电线路带电，而此时，当前车厢5若再次通过库用插座2通电，将会形成多个电源同时供电的情况，为此，参见图2所示，为避免发生此种情况，还包括用于检测三相母线上是否带电的母线交流检测继电器K1。
具体的，母线交流检测继电器K1的线圈跨接在三相母线的任意两相之间，为防止列车多个库用插座2同时供电，母线交流检测继电器K1的线圈 需要在其余车厢6的电流流向当前车厢5的三相用电线路前检测到电流，因此，母线交流检测继电器K1的线圈设置在三相用电线路与其余车厢6的用电设备3之间，以确保能够电流在从别的车厢进入当前车厢5之前提前检测到电流。
同时，互锁电路7中库用接触器K2的线圈与辅变接触器K3的常闭触点之间连接有相互并联的母线交流检测继电器K1的常闭触点和库用接触器K2的保持常开触点；母线交流检测继电器K1的常闭触点，用于控制库用接触器K2的线圈是否能够得电；当母线交流检测继电器K1的线圈检测到电流时，母线交流检测继电器K1的常闭触点将会断开，此时，若当前车厢5的库用插座2与库用电源连接，由于相互并联的库用接触器K2的保持常开触点和母线交流检测继电器K1的常闭触点均处于断开的状态，致使互锁电路7中的库用接触器K2的线圈无法得电，从而确保不会有新的库用插座2接入三相用电线路，确保列车不会同时有多个库用插座2进行供电的情况。
进一步的，为确保当库用插座2供电时，无法使用外部供电，避免用户启用外部供电导致库用供电断开，参见图3所示，还可以包括与外部供电控制电路8连接的库用接触器K2的第二触点；库用接触器K2的第二触点，用于断开后使外部供电控制电路8无法启用外部供电；其中，库用接触器K2第二触点可以为常开触点亦可以为常闭触点，图3中仅列举了库用接触器K2第二触点为常闭触点的情况，并不做限定。
具体的，外部供电控制电路8用于控制辅助逆变器1与外部供电电源4连接，库用接触器K2的第二触点控制了外部供电控制电路8与电源之间的连接；例如，当库用接触器K2的第二触点为常闭触点，当库用接触器K2的第二触点保持闭合状态，外部供电控制电路8正常工作，用户可以通过相应的操作使外部供电控制电路8控制外部供电连接装置建立外部供电电源4与辅助逆变器1的连接，例如，外部供电连接装置可以为受电弓，外部供电控制电路8可以控制受电弓上升与外部供电电源4连接，使列车进入外部供电状态；当库用接触器K2的第二触点保持断开状态，外部供电控制电路8失去供电，无法工作，用户无法控制外部供电控制电路8控 制外部供电连接装置建立外部供电电源4与辅助逆变器1的连接，因此，当进入库用供电模式后，外部供电电源4与辅助逆变器1无法建立连接，列车无法进入外部供电模式，只有当库用供电模式结束后，才可以进入外部供电模式，实现了外部供电与库用供电的互锁，确保了同一时间只能有一种供电模式。
其中，外部供电控制电路8可以具体为受电弓电磁阀11供电电路，具体电路还可以包括受电弓电磁阀11，其中，受电弓电磁阀11供电电路、库用接触器K2的第二触点和受电弓电磁阀11的具体连接关系可以参见图3所示。
需要说明的是，不同车厢对应的外部供电控制电路8均相同，各车厢的库用接触器K2的第二触点均相互串联在了外部供电控制电路8的供电电路上，当任一车厢的库用插座2供电，相应的库用接触器K2的线圈得电，相应的库用接触器K2的第二触点断开，均会使整个列车无法实现外部供电，确保了列车同一时间只能有一种供电模式。
可以理解的是，与外部供电控制电路8连接的库用接触器K2的第二触点确保了列车外部供电与库用供电两种供电模式的互锁，母线交流检测继电器K1确保了列车只能有一个库用插座2供电。
进一步的，为了更好提示用户当前列车供电模式，进一步防止人为的误操作，参见图4所示，可以利用列车的TCMS9(Train Control and Management System，列车控制和管理系统)显示当前列车是否为库用供电模式，且还可以显示为哪节车厢的库用插座2在供电，为此，还可以包括与TCMS9连接的库用接触器K2的第一触点。
具体的，库用接触器K2的第一触点，用于当库用接触器K2的第一触点动作后，以使TCMS9显示库用插座2供电的提示信息；库用接触器K2的第一触点，通过改变其工作状态，使TCMS9得知相应的库用插座2开始供电，例如，库用接触器K2的第一触点为常闭触点，库用接触器K2的第一触点一端可以连接电源另一端连接TCMS9的一个控制端，当库用接触器K2的第一触点为常闭触点时断开连接，TCMS9的控制端可以检测到电压消失，即由高电平变为低电平，从而确定库用插座2开始供电， TCMS9可以利用安装在列车中的显示器显示相应的提示信息告知用户当前正在由库用插座2供电，此外，库用接触器K2的第一触点也可以为常开触点，当库用接触器K2的第一触点为常开触点时闭合连接，TCMS9的控制端可以检测到电压出现，即由低电平变为高电平，从而确定库用插座2开始供电。
进一步的，不同车厢的库用接触器K2的第一触点分别连接TCMS9不同的控制端，因此，TCMS9可以根据不同控制端的状态变化，得知那个车厢的库用插座2供电，TCMS9可以利用安装在列车中的显示器显示相应的提示信息告知用户当前那个车厢的库用插座2正在供电，例如，显示“第5车厢的库用插座正在供电”的文字信息来提示用户。
可以理解的是，参见图4和图5所示，在互锁电路7与库用插座2之间可以通过库用保护开关F1连接，以更进一步的提高电路的安全性，用户在采用库用插座2供电前需闭合库用保护开关F1，断开库用保护开关F1，便可停止库用插座2供电，库用保护开关F1可以为空气开关。
具体的，当采用外部供电时，外部供电电源4负载能力有线，当采用库用供电时，库用供电电源负载能力较大，因此，针对于外部供电电源4负载能力设置的车辆断路器12便不适用与库用供电的情况，因此，当库用供电时，可以暂停车辆主断路器控制环路10工作，以确保库用供电能够发挥最大效能，参见图4所示，为此还可以包括与车辆主断路器控制环路10连接的库用接触器K2的第一常闭触点；库用接触器K2的第一常闭触点，用于断开后使车辆主断路器控制环路10失效。
其中，车辆主断路器控制环路10和库用接触器K2的第一常闭触点的电路，还可以包括断路器12，车辆主断路器控制环路10、库用接触器K2和断路器12的具体连接关系可以参见图4所示。
本发明实施例还公开了库用供电保护系统的另一种供电模式互锁结构，参见图5所示，具体的：库用供电保护系统，还可以包括与辅变接触器K3的线圈相连的库用接触器K2的第二常闭触点，库用接触器K2的第二常闭触点，用于控制辅变接触器K3的线圈是否得电，从而控制辅变接 触器K3的常开触点是否闭合，进而实现控制辅助逆变器1是否能与三相母线和三相用电线路连接进行外部供电，进一步的实现库用供电与外部供电的互锁。
具体的，当库用供电时，库用接触器K2的第二常闭触点将会处于断开状态，此时即使辅助逆变器1与外部供电电源4连接，辅助逆变器1也无法将电力输送至辅变接触器K3的线圈上，辅助逆变器1无法控制辅变接触器K3的线圈得电，辅变接触器K3的常开触点无法闭合，导致辅助逆变器1也无法将电力输送至三相用电电路和通过三相母线输送至其余车厢6，当有多个车厢带有库用插座2时，每个库用插座2均会在辅助逆变器1中辅变接触器K3的线圈前设置对应的库用接触器K2的第二常闭触点，每个库用接触器K2的第二常闭触点之间串联，确保了任意一个库用插座2供电后，辅助逆变器均无法供电。
需要说明的是，上述所有实施例中，列车可以有多个车厢具备库用供电的功能，每个车厢都具备相应的互锁电路7，例如，具备外部供电和库用供电功能的车厢，库用供电保护系统可以具备辅变接触器K3、库用接触器K2、母线交流检测继电器K1、互锁电路7和与外部供电控制电路8连接的库用接触器K2的第一触点；仅具备库用供电功能的车厢，则可以仅具备相应的库用接触器K2、相应的母线交流检测继电器K1和相应的互锁电路7，其中，整个列车中不论包括那种车厢仅有一个辅变接触器K3，即列车中全部互锁电路7中的辅变接触器K3的常闭触点均为具备外部供电和库用供电功能的车厢的辅变接触器K3的线圈控制。
最后，还需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者 设备中还存在另外的相同要素。
专业人员还可以进一步意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、计算机软件或者二者的结合来实现，为了清楚地说明硬件和软件的可互换性，在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本发明的范围。
以上对本发明所提供的一种库用供电保护系统进行了详细介绍，本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想；同时，对于本领域的一般技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本发明的限制。
Claims (7)
- 一种库用供电保护系统，其特征在于，应用于轨道交通领域，包括：三相母线、三相用电线路、辅变接触器和库用接触器；其中，所述三相母线为连接各车厢的供电母线，所述三相用电线路为连接所述三相母线、用电设备和库用插座的线路；所述辅变接触器的线圈由位于所述三相母线上的辅助逆变器控制，当所述辅助逆变器得电控制所述辅变接触器的线圈得电；所述辅变接触器的常开触点与所述辅助逆变器的输出端相连，所述辅变接触器的常开触点，用于控制所述辅助逆变器与所述三相母线和所述库用三相用电线路的连接；所述库用接触器的输入常开触点与所述库用插座连接，所述库用接触器的输入常开触点，用于控制所述库用插座与所述三相母线和所述用电设备的连接；位于所述三相母线上的所述辅变接触器的常开触点通过所述三相用电线路与所述库用接触器的输入常开触点相连；所述库用接触器的输入常开触点与所述库用插座之间的所述三相用电线路的任意两相之间跨接有互锁电路；所述互锁电路包括串联的所述库用接触器的线圈和所述辅变接触器的常闭触点。
- 根据权利要求1所述的库用供电保护系统，其特征在于，还包括与TCMS连接的所述库用接触器的第一触点；所述库用接触器的第一触点，用于当所述库用接触器动作后，以使所述TCMS显示所述库用插座供电的提示信息。
- 根据权利要求1所述的库用供电保护系统，其特征在于，所述互锁电路与所述库用插座之间通过库用保护开关连接。
- 根据权利要求1所述的库用供电保护系统，其特征在于，还包括与车辆主断路器控制环路连接的所述库用接触器的第一常闭触点；所述库用接触器的第一常闭触点，用于断开后使所述车辆主断路器控制环路失效。
- 根据权利要求1至4任一项所述的库用供电保护系统，其特征在于，还包括用于检测所述三相母线上是否带电的母线交流检测继电器；所述母线交流检测继电器的线圈跨接在所述三相母线的任意两相之间，所述母线交流检测继电器的线圈设置在所述三相用电线路与其余车厢的用电设备之间；所述互锁电路中所述库用接触器的线圈与所述辅变接触器的常闭触点之间连接有相互并联的所述母线交流检测继电器的常闭触点和所述库用接触器的保持常开触点；所述母线交流检测继电器的常闭触点，用于控制所述库用接触器的线圈是否能够得电。
- 根据权利要求5所述的库用供电保护系统，其特征在于，还包括与外部供电控制电路连接的所述库用接触器的第二触点；所述库用接触器的第一触点，用于断开后使所述外部供电控制电路无法启用外部供电。
- 根据权利要求5所述的库用供电保护系统，其特征在于，还包括与所述辅变接触器的线圈相连的所述库用接触器的第二常闭触点；所述库用接触器的第二常闭触点，用于控制所述辅变接触器的线圈得电。
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