CN210007468U - kinds of mobile emergency power supply device - Google Patents

Abstract

The utility model relates to a mobile emergency power supply device, comprising an emergency power supply vehicle and an emergency feeder power supply vehicle. The mobile vehicle body of the emergency power supply vehicle is provided with a battery system, a charging device, a direct current conversion device, a direct current monitoring device and a communication management unit. The system includes an energy storage battery and a battery management unit. The input of the charging device is connected to 220V AC, and the output is divided into three channels. The first channel is electrically connected to the energy storage battery, the second channel is electrically connected to the DC conversion device, and the third channel is connected to the aviation The plug, the output of the DC conversion device is divided into two channels, one is electrically connected to the battery management unit, and the other is connected to the aviation plug; the communication management unit is simultaneously connected to the DC monitoring device and the battery management unit, and the DC monitoring device is also connected to the charging device and DC. The conversion device is connected for communication; the mobile car body of the emergency feeder is provided with a plurality of feeder switches. The device can be applied to various work scenarios, improves the utilization rate of the device, and is flexible in movement and configuration, and easy to use.

Description

A mobile emergency power supply device

technical field

The utility model relates to the technical field of direct current power supply systems for substations, in particular to a mobile emergency power supply device.

Background technique

The DC power supply system is an important part of the power supply system for power plants and substations, and the battery, as an independent backup power supply of the DC system, provides power supply for signal, control, closing, and comprehensive automation in the event of an AC power failure, which is the guarantee of the DC power supply system. The last line of defense for reliability. At present, the batteries used in substations are basically valve-regulated lead-acid batteries, accounting for more than 99% of the batteries used in substations. Due to some characteristics of the VRLA battery itself, it is necessary to conduct nuclear capacity of the battery every once in a while, and the battery needs to be disconnected from the DC bus when the nuclear capacity is discharged. Because the battery is separated from the DC bus, once the AC power failure occurs, the charger stops working, which will cause the entire DC system to lose power, and the protection and control devices cannot operate, which will cause a major accident. On the other hand, when the station is upgraded with a DC power supply, the substation needs to be powered off for a long time, which cannot meet the needs of power customers and hinders the development of the social economy. The development of electric power enterprises is of great significance.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a mobile emergency power supply device, which can be applied to various working scenarios, improves the utilization rate of the device, and is flexible in movement and configuration, and easy to use.

In order to achieve the above purpose, the technical scheme of the present utility model is: a mobile emergency power supply device, including an emergency power supply vehicle and an emergency feeder power supply vehicle, and the mobile vehicle body of the emergency power supply vehicle is provided with a battery system, a charging device, a DC converter. device, a DC monitoring device and a communication management unit, the battery system includes an energy storage battery and a battery management unit, the input terminal of the charging device is connected to 220V alternating current, the output terminal is divided into three channels, and the first channel is electrically connected to the energy storage battery The second circuit is electrically connected to the DC conversion device for DC voltage conversion, and the third circuit is connected to the aviation plug for external output. The output end of the DC conversion device is divided into two channels, one is connected to the battery management unit It is electrically connected to provide working power for it, and the other is connected to an aviation plug for external output; the communication management unit is connected to the DC monitoring device and the battery management unit in communication at the same time, so as to sample the battery information in real time and transmit it to the DC monitoring device, and Send the command of the DC monitoring device to the battery management unit, so that the DC monitoring device and the battery management unit can work together stably, the DC monitoring device is also connected to the charging device and the DC conversion device in communication to monitor the status of each device; the emergency feeder A plurality of feeder switches are arranged on the moving vehicle body of the power supply vehicle.

Further, the energy storage battery is a lithium iron phosphate battery, the battery system is a lithium iron phosphate battery system, and the nominal voltage of the lithium iron phosphate battery system is 220VDC.

Further, the output terminal voltage of the DC conversion device is 48VDC.

Further, the feeder switch on the emergency feeder power supply vehicle includes a 220VDC feeder switch and a 48VDC feeder switch, and the emergency feeder power supply vehicle is provided with an aviation connector corresponding to the corresponding aviation plug on the emergency power supply vehicle.

Further, the emergency power supply vehicle is composed of two parts: a battery vehicle and a charging vehicle, and the energy storage battery is formed of a plurality of battery boxes connected in series. The energy storage battery is equipped with two output circuits on the battery vehicle, one is a DC output circuit with an anti-backflow diode, and the other is a direct DC output circuit. The battery management unit, charging device, DC conversion device, DC monitoring device and The communication management unit is arranged on the moving body of the charging vehicle.

Further, the battery management unit (BMS) is mainly composed of a battery system management module, a battery cluster management module, and a collection module, between the collection module and the battery cluster management module, and between the battery cluster management module and the battery system management module. CAN communication is used between modules, and RS485 communication is used between the management module of the battery system and the DC monitoring device.

Compared with the prior art, the beneficial effect of the present invention is that a mobile emergency power supply device combining an emergency power supply vehicle and an emergency feeder power supply vehicle is provided, which can be used alone or in combination for different work scenarios, and simultaneously solves the problem. The problems of off-line nuclear capacity and uninterrupted upgrading and transformation of the DC system of the substation DC system not only improve the safety and reliability of the DC system operation of the substation, but also truly realize "one machine with multiple functions" and improve the utilization rate of the mobile emergency power supply device. In addition, the device is mobile, flexible in configuration, easy to use and operate, and has strong practicability and broad application prospects.

Description of drawings

FIG. 1 is a schematic diagram of a device structure according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of an external structure of a device according to an embodiment of the present invention.

In the figure, 1. Emergency power supply vehicle, 2. Emergency feeder power supply vehicle, 3. Charging device, 4. DC conversion device, 5. DC monitoring device, 6. Communication management unit, 7. Energy storage battery, 8. Battery management unit , 9, battery car, 10, charging car, 21~25, 220VDC feeder switch, 26, 48VDC feeder switch, 71~75, battery box.

Detailed ways

The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

The utility model provides a mobile emergency power supply device, as shown in Figures 1 and 2, comprising an emergency power supply vehicle 1 and an emergency feeder power supply vehicle 2. The mobile vehicle body of the emergency power supply vehicle 1 is provided with a battery system, charging (AC/DC) ) device 3 , a direct current conversion (DC/DC) device 4 , a direct current monitoring device 5 and a communication management unit 6 , the battery system includes an energy storage battery 7 and a battery management unit 8 . The input terminal of the charging device 3 is connected to 220V alternating current, and the output terminal is divided into three circuits. The first circuit is electrically connected to the energy storage battery 7 to charge it, and the second circuit is electrically connected to the DC conversion device 4 for DC voltage conversion. The third channel is connected to the aviation plug for external output. The output end of the DC conversion device 4 is divided into two channels, one is electrically connected to the battery management unit 8 to provide working power for it, and the other is connected to the aviation plug for external output. The communication management unit 6 is connected in communication with the DC monitoring device 5 and the battery management unit 6 at the same time, so as to sample the battery information in real time and transmit it to the DC monitoring device 5, and transmit the command of the DC monitoring device 5 to the battery management unit 8, so that the DC monitoring device can 5 cooperates with the battery management unit 8 to work stably, the DC monitoring device 5 is also connected to the charging device 3 and the DC conversion device 4 in communication to monitor the status of each device; the mobile body of the emergency feeder power supply vehicle 2 is provided with a plurality of feeder switches.

In this embodiment, the energy storage battery 7 is a lithium iron phosphate battery, the battery system is a lithium iron phosphate battery system, the nominal voltage of the lithium iron phosphate battery system is 220VDC, and the nominal voltage of a single-cell lithium iron phosphate battery is 3.2V. In order to meet the requirement that the power supply time in the 110kV substation is not less than 0.5h, 86Ah cells are selected. The energy storage battery 7 is composed of 5 battery boxes 71~75. The cells in each battery box are connected by 1P14S, and the battery boxes are connected in series to form a 224V/19.26kW battery system, which can reach 0.2C charge and discharge Cycle times ≥ 3000 times. The air plug is used between the battery boxes. The B- of the battery box 1 is connected to the B+ of the battery box 2, and so on, and finally connected to the B+ and B- terminals of the main control box in series, and the P+ and P- of the main control box are connected. The cables are connected to the positive and negative poles of the DC bus, respectively. The positive pole of the aviation plug is red, and the negative pole is black, which corresponds to the color of the positive and negative sockets on the battery box, which is convenient for wiring and avoids misconnection. The output terminal voltage of the DC conversion device is 48VDC. Correspondingly, the feeder switches on the emergency feeder power supply vehicle 2 include five 220VDC feeder switches 21 to 25 and one 48VDC feeder switch 26 . The emergency feeder power supply cart 2 is provided with an aviation connector which is connected with the corresponding aviation plug on the emergency power supply cart 1 .

As shown in FIG. 2 , the emergency power supply cart 1 of the device is composed of two parts, a battery cart 9 and a charging cart 10 . The energy storage battery 7 is equipped with two output circuits on the battery vehicle 9, one is a DC output circuit with an anti-backflow diode, the other is a direct DC output circuit, a battery management unit, a charging device, a DC conversion device, a DC monitoring device and a communication device The management unit is arranged on the moving vehicle body of the charging vehicle.

In this embodiment, the battery management unit (BMS) is mainly composed of a battery system management module (GBMU), a battery cluster management module (BMU), and a collection module (BSU). CAN communication is used between the management module of the battery cluster and the management module of the battery system, and RS485 communication is used between the management module of the battery system and the DC monitoring device.

When the battery of the station DC power system needs to be checked off-line, connect the DC output terminal of the emergency power supply vehicle in parallel to the DC bus of the original DC system, and use it as the backup battery of the original DC system. When the battery is offline for capacity verification, if the mains of the station DC system fails or the DC charger stops running, the monitoring unit of the emergency power supply device detects the loss of the bus voltage, and starts to supply power to the load through the battery pack according to the detected load current demand. Real-time monitoring of online voltage and current, etc. This working mode realizes seamless switching of power supply when the original DC system busbar loses power, and ensures the reliability of DC load power supply.

When the station is upgraded with the DC power system, the emergency power supply vehicle and the emergency feeder power supply vehicle are connected together for use, and the original DC feeder part is transferred to the emergency feeder power supply vehicle. The feeder power supply vehicle is connected in parallel with the original DC feeder to supply power to each load of the original DC system, and the device is used as a backup DC power supply system. The new generation of mobile emergency power supply system is used as the backup DC power supply system, which solves the problem of upgrading the DC system without interruption of the substation. The system is equipped with 220VDC and 48VDC DC power output according to the actual needs of most substations, which expands the versatility of the system.

Among them, when the battery of the station DC power system needs to be checked off-line, and the energy storage battery of the device is used as the backup battery of the original DC system, the energy storage battery is connected to the output of the DC output circuit with an anti-backflow diode to prevent the original The DC system charges the energy storage battery to avoid mutual influence between two sets of DC systems with different battery types. When the station is upgraded with the DC power system and the device is used as a backup DC power system, the energy storage battery is connected to the direct DC output circuit for output.

The above are the preferred embodiments of the present utility model, all changes made according to the technical solutions of the present utility model, when the resulting functional effects do not exceed the scope of the technical solutions of the present utility model, belong to the protection scope of the present utility model.

Claims (6)

1. a mobile emergency power supply device is characterized in that, comprising an emergency power supply vehicle and an emergency feeder power supply vehicle, and the mobile vehicle body of the emergency power supply vehicle is provided with a battery system, a charging device, a DC conversion device, a DC monitoring device and a communication device A management unit, the battery system includes an energy storage battery and a battery management unit, the input terminal of the charging device is connected to 220V alternating current, and the output terminal is divided into three channels, the first channel is electrically connected to the energy storage battery to charge it, and the second channel is electrically connected to the energy storage battery. The first circuit is electrically connected to the DC conversion device for DC voltage conversion, and the third circuit is connected to the aviation plug for external output. The working power supply is connected to the aviation plug for external output; the communication management unit is connected to the DC monitoring device and the battery management unit in communication at the same time, so as to sample the battery information in real time and transmit it to the DC monitoring device, and transmit the command of the DC monitoring device to the DC monitoring device. A battery management unit, so that the DC monitoring device and the battery management unit can work together stably, the DC monitoring device is also connected to the charging device and the DC conversion device in communication to monitor the status of each device; There are multiple feeder switches. 2. A mobile emergency power supply device according to claim 1, wherein the energy storage battery is a lithium iron phosphate battery, the battery system is a lithium iron phosphate battery system, and the lithium iron phosphate battery system is marked with The voltage is called 220VDC. 3 . The mobile emergency power supply device according to claim 2 , wherein the output terminal voltage of the DC conversion device is 48VDC. 4 . 4. A mobile emergency power supply device according to claim 3, characterized in that, the feeder switch on the emergency feeder power supply vehicle comprises a 220VDC feeder switch and a 48VDC feeder switch, and the emergency feeder power supply vehicle is provided with an emergency feeder switch. The aviation connector that the corresponding aviation plug on the power supply car is connected to. 5 . The mobile emergency power supply device according to claim 1 , wherein the emergency power supply vehicle is composed of a battery vehicle and a charging vehicle, and the energy storage battery is formed by connecting a plurality of battery boxes in series. 6 . A plurality of battery boxes are connected in series on the mobile body of the battery vehicle. The energy storage battery is equipped with two output circuits on the battery vehicle, one is a DC output circuit with anti-backflow diodes, and the other is a direct DC output circuit. The battery management unit, the charging device, the DC conversion device, the DC monitoring device and the communication management unit are arranged on the moving body of the charging vehicle. 6 . The mobile emergency power supply device according to claim 1 , wherein the battery management unit (BMS) is mainly composed of a battery system management module, a battery cluster management module and a collection module, and the collection module is connected to the battery CAN communication is used between the management modules of the cluster and between the management module of the battery cluster and the management module of the battery system, and RS485 communication is used between the management module of the battery system and the DC monitoring device.

Images