Railway air-conditioned generator car movable test resistive energy storage load system

Abstract

The utility model relates to a movable resistance type energy storage load system for testing of railway air conditioner generating car, which comprises a load box, input connectors for connecting the generator set of the railway air conditioner generating car, a first control unit, a first switch, a load unit, a load capacity testing device, a plurality of universal wheels, an energy storage module, a second control unit, an energy storage unit, a third switch, an energy storage output connector, and an emergency lighting device of the air conditioner car. The second control unit controls the energy storage unit to store the electric energy generated by the generator set or release the stored electric energy, and the stored electric energy is released to the emergency lighting device of the railway air conditioner car through the third switch, thereby improving the energy utilization rate and detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of power generation testing equipment and energy storage technology, and in particular to a resistive energy storage load system for mobile testing of railway air conditioning power generation vehicles. Background Technology

[0002] Railway air-conditioned power generation cars are generally equipped with three diesel generator sets. To ensure the safe and reliable operation of the generator sets, performing a full-load test is the only way to verify their performance. This effectively avoids safety accidents and loss of life and property for passengers caused by starting failures in the air-conditioned power generation cars, and provides a scientific basis for the load testing of these cars. Currently, the load system used for load testing of railway air-conditioned power generation cars is basically fixed in a specific area. It includes a control box and an input connector installed in the control box for electrically connecting the generator sets of the railway air-conditioned power generation car. It is also equipped with a load testing module. The load testing module includes a first control unit installed in the control box and a load unit connected to the input connector via a first switch. This load unit is generally a simulated passenger car placed in a fixed location. The first control unit controls the first switch to load or unload the load unit, thereby testing the load-carrying capacity of the generator set. Therefore, when load tests are required on railway air-conditioning generator cars, shunting operations are the only way to move the generator cars to a designated location, connect them to the passenger cars (load units), and then activate the power supply loads in the passenger cars before conducting the load test. This obviously increases the amount of shunting work and reduces the efficiency of maintenance operations within the depot. Furthermore, the electrical energy generated by the generator cars cannot be stored, resulting in low energy utilization. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a resistive energy storage load system for mobile testing of railway air-conditioning generator cars with high load detection efficiency and energy utilization rate, in light of the above-mentioned existing technology.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a mobile test resistive energy storage load system for railway air-conditioning generator cars, including a load box and an input connector installed in the load box for electrically connecting the generator set of the railway air-conditioning generator car. The load box is equipped with a load test module, which includes a first control unit and a load unit connected to the input connector through a first switch. The first control unit controls the first switch to load or unload the load unit to test the load capacity of the generator set. The load box is characterized by having multiple sets of casters at the bottom and an energy storage module inside. The energy storage module includes a second control unit and an energy storage unit connected to the input connector through a second switch. The load box is also equipped with an energy storage output connector connected to the energy storage unit through a third switch. The energy storage output connector is used to connect to the emergency lighting equipment of the air-conditioning car. The second control unit controls the energy storage unit to store the electrical energy generated by the generator set or release the stored electrical energy, and releases the stored electrical energy to the emergency lighting equipment of the railway air-conditioning car through the third switch.

[0005] To address the heat dissipation issues of the load unit and energy storage unit and ensure their long-term, normal operation, a further improvement is made: the load box is equipped with independent load cooling ducts and energy storage cooling ducts, each distributed from bottom to top. A first cooling fan connected to the first control unit is installed within the load cooling duct, and a second cooling fan connected to the first control unit is installed within the energy storage cooling duct. The exhaust port of the first cooling fan faces the load unit, and the inlet of the second cooling fan faces the energy storage unit. This rationally designed cooling duct system, coupled with forced air cooling, effectively solves the heat dissipation problem between the load unit and energy storage unit within the limited space of the load box. This effectively addresses the heat dissipation challenge of simultaneously configuring energy storage and load units, ensuring the safe and reliable operation of the energy storage unit, especially under high ambient temperatures.

[0006] To facilitate installation and ensure good internal and external ventilation conditions for the load cooling duct and energy storage cooling duct, the load box is divided into a load unit mounting cavity for installing the load unit, a first cooling fan mounting cavity for installing the first cooling fan, an energy storage unit mounting cavity for installing the energy storage unit, and a second cooling fan mounting cavity for installing the second cooling fan. The load unit mounting cavity is located above the first cooling fan mounting cavity and has a first vent at the bottom and a first exhaust port at the top that communicates with the outside. The bottom of the hot air blower mounting cavity has a second vent hole, and the top has a second exhaust port that communicates with the outside. The energy storage unit mounting cavity is located below the second cooling fan mounting cavity and adjacent to the first cooling fan mounting cavity. The bottom plate of the load box has a first air inlet hole. The first air inlet hole, the first cooling fan mounting cavity, the first vent hole, the load unit mounting cavity, and the first exhaust port constitute the load cooling air duct. The first air inlet hole, the energy storage unit mounting cavity, the second vent hole, the second cooling fan mounting cavity, and the second exhaust port constitute the energy storage cooling air duct.

[0007] To ensure that the first cooling fan can quickly and efficiently remove most of the heat generated by the energy storage unit, a second air inlet is provided on the back plate of both the energy storage unit mounting cavity and the first cooling fan mounting cavity, and ventilation holes are provided on the partition between the energy storage unit mounting cavity and the first cooling fan mounting cavity. In this way, through a rationally designed structure, the various functional cavities are organically combined into a single integrated load cell structure.

[0008] The first switch and the second switch have various structures. From the perspective of simple structure and easy operation, the first switch is preferably a first circuit breaker and a contactor, and the second switch is a second circuit breaker. The load box is also divided into a generator cable input cavity for installing the input connector and an electrical component mounting cavity for installing the first circuit breaker, the second circuit breaker and the contactor. The input connector is connected to the load unit in the load unit mounting cavity through the first conductor, the first circuit breaker and the contactor in the electrical component mounting cavity.

[0009] To facilitate the input and output connection of the energy storage unit, the load box is also divided into an energy storage unit cable input cavity and an energy storage unit cable output cavity, which are adjacent to and connected to the energy storage unit mounting cavity. The input connector is connected to the energy storage unit via a second conductor, a second circuit breaker in the electrical component mounting cavity, and an energy storage input connector located in the energy storage unit cable input cavity. The energy storage output connector is located in the energy storage unit cable output cavity.

[0010] Since the total test power of the generator set is the sum of the power of the load unit and the power of the energy storage unit, in order to achieve power distribution between the load unit and the energy storage unit, a comprehensive power monitoring instrument capable of monitoring and displaying the total test power of the generator set is installed on the panel of the load box. The first control unit includes a programmable logic controller (PLC) and a human-machine interface (HIMI) connected to the PLC. The PLC can control the opening or closing of the first switch based on the power value input in the HIMI. The energy storage unit is a battery pack. The second control unit includes a battery management system (BMS) that manages the storage or release of electrical energy in the battery pack and a display screen that displays the battery pack parameters collected by the BMS. Thus, the tester can calculate the load unit power value to be input into the HIMI based on the displayed total power and battery pack parameters. The PLC controls the load unit to load or unload based on this input load unit power value.

[0011] Furthermore, the load unit includes an alloy resistor group composed of alloy resistors that are integer multiples of three, a heat sink disposed outside the alloy resistor group, and an insulating medium filled between each alloy resistor and the heat sink. Thus, the load unit ensures heat dissipation through the heat sink.

[0012] In order to ensure that the airflow of the first cooling fan can evenly remove the heat from the alloy resistors, the top alloy resistors in the alloy resistor group are arranged vertically, and the remaining alloy resistors are arranged in a matrix at a 45° angle to the horizontal direction.

[0013] To facilitate the replacement and disassembly of the alloy resistors, each alloy resistor is detachably connected to the heat sink via its respective support plate.

[0014] Compared with the prior art, the advantages of this utility model are as follows: it can use the first control unit and the load unit simulating the load to complete the load capacity test of the generator set, and at the same time, it can use the second control unit to control the energy storage unit to store the electrical energy generated by the generator set or release the stored electrical energy and release the stored electrical energy to the emergency lighting equipment of the railway air-conditioning car through the third switch. That is, it stores part of the electrical energy of the generator set, realizes the effective switching of power between the load unit and the energy storage unit, and ensures that the energy storage efficiency is optimized during the effective load test period of the generator car, thereby improving the energy utilization rate. At the same time, multiple sets of universal wheels are provided at the bottom of the load box, which allows this utility model to move freely, with high flexibility, reducing the amount of shunting work and improving the testing efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0016] Figure 2This is a schematic diagram of the overall structure from another angle of an embodiment of the present utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of an embodiment of the present utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure from another angle of an embodiment of the present utility model;

[0019] Figure 5 This is a schematic diagram of the load unit in an embodiment of the present invention;

[0020] Figure 6 This is a schematic diagram of the airflow direction of the load heat dissipation air duct and the energy storage heat dissipation air duct in the embodiments of this utility model;

[0021] Figure 7 This is an electrical connection diagram of the load system in an embodiment of this utility model;

[0022] Figure 8 This is a control connection diagram of the programmable logic controller (PLC) in an embodiment of this utility model;

[0023] Figure 9 This is a control connection diagram of the battery management system (BMS) in an embodiment of this utility model. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0025] like Figure 1-9 The image shows a preferred embodiment of the present invention. This embodiment provides a mobile test resistive energy storage load system for a railway air-conditioning generator car, comprising a load box 1, an input connector 2 installed in the load box 1 for electrically connecting to the generator set of the railway air-conditioning generator car, a load test module 3 located within the load box 1, an energy storage module 5, a first cooling fan 6, a second cooling fan 7, and multiple sets of casters 4 located at the bottom of the load box 1.

[0026] In this embodiment, the load test module 3 includes a first control unit 31 and a load unit 33 connected to the input connector 2 via a first switch 32. The first control unit 31 includes a programmable logic controller (PLC) 311 and a human-machine interface (HIMI) 312 connected to the PLC 311. The PLC 311 controls the first switch 32 to open or close based on the power value input into the HIMI 312, thereby loading or unloading the load unit 33 to test the generator set's load-carrying capacity. The first switch 32 is a first circuit breaker and contactor, and multiple first switches 32 (i.e., multiple first circuit breakers and multiple contactors) are installed in the load box 1. During operation, the required load unit power value is input into the HIMI, and the PLC 311 controls one or more first switches 32 to close or open, thereby loading or unloading the load unit 33. Figure 5 As shown, the load unit 33 preferably consists of an alloy resistor group comprising an integer multiple of 3 alloy resistors 331, a heat sink 332 disposed outside the alloy resistor group, and an insulating medium filled between each alloy resistor 331 and the heat sink 332. In order to facilitate the replacement of individual alloy resistors 331, each alloy resistor 331 is detachably connected to the heat sink 332 through its respective support plate 333. In this way, the damaged alloy resistor 331 can be easily removed by removing the support plate 333 without removing other normally used alloy resistors 331.

[0027] The aforementioned energy storage module 5 includes a second control unit 51, an energy storage unit 53 connected to the input connector 2 via a second switch 52, an energy storage output connector 55 connected to the energy storage unit 53 via a third switch 54, and an energy storage input connector 56. The second control unit 51 controls the energy storage unit 53 to store or release the stored electrical energy generated by the generator set, and releases the stored electrical energy to the emergency lighting equipment of the railway air-conditioned car via the third switch 54. Specifically, the second switch 52 is a second circuit breaker, the energy storage unit 53 is a battery pack, and the second control unit 51 includes a battery management system (BMS) 511 (in this embodiment, the BMS is model TTA8AE03, manufactured by Zhengzhou Zhengfang Co., Ltd.) that manages the storage or release of electrical energy by the battery pack, and a display screen 512 that displays the battery pack parameters (percentage of remaining battery capacity, voltage, charging and discharging time, power, etc.) collected by the BMS 511. The BMS 511 adapts to the fluctuations in generator set current to match the charging power with the battery capacity. The battery pack preferentially uses removable semi-solid-state safety cells, which can be easily replaced by removing the backplate at the rear of the load box 1. The energy storage output connector 55 is used to connect to the emergency lighting equipment of the air-conditioned car. The energy storage input connector 56 is connected to the aforementioned input connector 2 via the second switch 52.

[0028] like Figures 1 to 4 As shown, in order to facilitate the installation of the above-mentioned functional units, in this embodiment, the load box 1 is divided into a load unit mounting cavity 1a for installing the load unit 33, a first cooling fan mounting cavity 1b for installing the first cooling fan 6, an energy storage unit mounting cavity 1c for installing the energy storage unit 53, a second cooling fan mounting cavity 1d for installing the second cooling fan 7, a generator cable input cavity 1f for installing the input connector 2, an electrical component mounting cavity 1g for installing the first circuit breaker, the second circuit breaker and the contactor, an energy storage unit cable input cavity 1h and an energy storage unit cable output cavity 1i that are adjacent to and connected to the energy storage unit mounting cavity 1c, and a control mounting cavity 1j for installing the programmable logic controller PLC 311.

[0029] And in order to dissipate the heat inside load cell 1 in a timely manner, such as Figure 6 As shown, the load box 1 is also equipped with independent load cooling ducts and energy storage cooling ducts distributed from bottom to top. Specifically, the load unit mounting cavity 1a is located above the first cooling fan mounting cavity 1b and has a first vent 11a at the bottom and a first exhaust vent 12a at the top that communicates with the outside. The second cooling fan mounting cavity 1d has a second vent 11d at the bottom and a second exhaust vent 12d at the top that communicates with the outside. The energy storage unit mounting cavity 1c is located below the second cooling fan mounting cavity 1d and is adjacent to the first cooling fan mounting cavity 1b. The bottom plate 13 of the load box 1 is provided with a first air inlet 1e. The back plate 10 of the energy storage unit mounting cavity 1c and the first cooling fan mounting cavity 1b is provided with a second air inlet 10a. The partition 11 between the energy storage unit mounting cavity 1c and the first cooling fan mounting cavity 1b is densely provided with ventilation holes 11b. The first air inlet 1e, the first cooling fan mounting cavity 1b, the first vent 11a, the load unit mounting cavity 1a, and the first exhaust vent 12a constitute the load cooling air duct, and the first air inlet 1e, the energy storage unit mounting cavity 1c, the second vent 11d, the second cooling fan mounting cavity 1d, and the second exhaust vent 12d constitute the energy storage cooling air duct.

[0030] In this embodiment, the first cooling fan 6 and the second cooling fan 7 are controlled and connected by the first control unit 31. The air outlet of the first cooling fan 6 faces the load unit 33, and the air inlet faces the energy storage unit 53, that is, it adopts a horizontal air inlet and top outlet method to remove the heat generated by the load unit 33 and most of the heat generated by the energy storage unit 53, avoiding backflow caused by changes in airflow direction. In the alloy resistor group, the top alloy resistor 331 is arranged vertically, and the remaining alloy resistors 331 are arranged in a matrix at a 45° angle to the horizontal direction to ensure that the air from the first cooling fan 6 evenly removes the heat from the alloy resistors 331. The first cooling fan 6 is an axial flow low-noise fan, and vibration-damping rubber pads are added during installation to effectively prevent the wiring of the alloy resistors 331 from becoming loose. The air inlet of the second cooling fan 7 faces the energy storage unit 53, and the air outlet is connected to the outside of the load box 1 through the second exhaust port 12d, adopting a vertical air inlet and top outlet method to remove the remaining heat generated by the energy storage unit 53. In other words, when the first cooling fan 6 and the second cooling fan 7 are working, they mainly draw air in through the second air inlet 10a on the back plate of the load box, the first air inlet 1e on the bottom plate 13 of the load box 1, and the densely arranged ventilation holes 11b. The two cooling fans work together to effectively solve the heat dissipation problems of the energy storage unit and the load unit.

[0031] like Figure 7 As shown, load testing and energy storage charging / discharging use independent circuits to avoid fluctuations in charging power caused by changes in the load of the load unit. Specifically, input connector 2 is connected to load unit 33 in load unit mounting cavity 1a via the first conductor, the first circuit breaker and contactor in electrical component mounting cavity 1g; input connector 2 is connected to energy storage unit 53 via the second conductor, the second circuit breaker in electrical component mounting cavity 1g, and energy storage input connector 56 in energy storage unit cable input cavity 1h; energy storage output connector 55 is located in energy storage unit cable output cavity 1i; energy storage unit 53 is connected to emergency lighting equipment via third switch 54 and energy storage output connector 55. The first and second conductors are cables, copper busbars, or aluminum busbars; the third switch 54 is an air switch; input connector 2 is a railway-specific quick connector; and all cables converge using a delta connection to load unit 33 in load unit mounting cavity 1a.

[0032] In this embodiment, a comprehensive power monitoring instrument 12 (model ACR220ELH, manufactured by Acrel) capable of monitoring and displaying the total test power of the generator set, the aforementioned human-machine interface HIMI 312, and the display screen 512 are installed on the door panel of the control installation cavity 1j. The comprehensive power monitoring instrument 12 is located directly above the HMI 312 and displays parameters such as the three-phase voltage, three-phase current, three-phase power, total power, power factor, frequency, and accumulated energy of the current generator set. To ensure that the comprehensive power monitoring instrument 12 displays actual values ​​such as power under the current operating conditions of the generator set, data acquisition by the comprehensive power monitoring instrument 12 is performed on the main busbar in the generator set cable input cavity 1f. Since the total power of the generator set test is the sum of the power of the load unit and the power of the energy storage unit, in order to achieve power distribution between the load unit and the energy storage unit, the tester can calculate the load unit power value that should be input on the human-machine interface (HIMI) based on the total power displayed on the power monitoring instrument 12 and the battery pack parameters displayed on the display screen 512. The programmable controller (PLC) controls the load unit to load or unload based on the input load unit power value.

[0033] This embodiment has three operating modes: single energy storage mode, single load test mode, and simultaneous energy storage and load testing mode. In single energy storage mode, the second switch is turned on only to charge the energy storage unit; in single load test mode, the second switch is turned off when the energy storage unit is fully charged, and a single load test is performed; in simultaneous energy storage and load testing mode, the energy storage unit is charged and tested simultaneously. The operating states of each mode can be freely switched, and the input and output interfaces in each mode are independent and do not interfere with each other. The operation of the first cooling fan 6 and the second cooling fan 7 is controlled by buttons on the HMI312. In the simultaneous energy storage and load testing mode, both cooling fans are activated simultaneously by pressing the buttons on the HMI312, then the second switch is manually turned on to charge the energy storage unit. The load is manually input via buttons on the HMI312. The actual power value of the current generator set operating condition reflects the sum of the power of the load unit, the two fans, and the energy storage unit.

[0034] To ensure the efficient and stable operation of the battery pack, the generator needs to provide a stable voltage and sufficient power to charge the energy storage device. Therefore, when the generator set is subjected to sudden load increase or decrease, the second and third switches should be turned off in advance to prevent the sudden increase or decrease of the load on the entire system from causing strong fluctuations in the power supply of the battery pack.

[0035] This embodiment, as a mobile emergency power supply device, is equipped with six sets of omnidirectional wheels 4 at the bottom of the load box 1 for easy and quick movement by the user. It also features forklift holes at the bottom and lifting eye bolts at the top for convenient handling. This facilitates movement during testing and reduces the workload of shunting operations. Furthermore, in special circumstances such as railway interruptions or power outages, this invention can also serve as a mobile emergency power supply device, meeting the actual needs of railway emergency power supplies such as emergency lighting, thereby providing necessary power support along the railway line. This is of great significance for ensuring the normal operation of railway air conditioning generators and the emergency power supply of railway stations. Moreover, this organic integration of load testing and energy storage technology transforms previously ineffective or harmful energy into effective energy, aligning with the current social trend of energy conservation and emission reduction.

Claims

1. A mobile test resistive energy storage load system for a railway air-conditioning generator car, comprising a load box (1) and an input connector (2) installed in the load box (1) for electrically connecting to a generator set of the railway air-conditioning generator car, wherein the load box (1) is provided with a load test module (3), the load test module (3) comprising a first control unit (31) and a load unit (33) connected to the input connector (2) via a first switch (32), wherein the first control unit (31) tests the load-carrying capacity of the generator set by controlling the first switch (32) to load or unload the load unit (33), characterized in that: The load box (1) is provided with multiple sets of casters (4) at the bottom, and an energy storage module (5) is also provided in the load box (1). The energy storage module (5) includes a second control unit (51) and an energy storage unit (53) connected to the input connector (2) through a second switch (52). An energy storage output connector (55) connected to the energy storage unit (53) through a third switch (54) is also installed in the load box (1). The energy storage output connector (55) is used to connect to the emergency lighting equipment of the air-conditioned car. The second control unit (51) controls the energy storage unit (53) to store the electrical energy generated by the generator set or to release the stored electrical energy, and releases the stored electrical energy to the emergency lighting equipment of the railway air-conditioned car through the third switch (54).

2. The resistive energy storage load system for movable test of a railway air-conditioned generator car according to claim 1, characterized in that: The load box (1) is provided with load heat dissipation air ducts and energy storage heat dissipation air ducts that are independent of each other and distributed from bottom to top. A first heat dissipation fan (6) connected to the first control unit (31) is provided in the load heat dissipation air duct, and a second heat dissipation fan (7) connected to the first control unit (31) is provided in the energy storage heat dissipation air duct. The air outlet of the first heat dissipation fan (6) faces the load unit (33), and the air inlet of the second heat dissipation fan (7) faces the energy storage unit (53).

3. The resistive energy storage load system for movable test of a railway APU, according to claim 2, characterized in that: The load box (1) is divided into a load unit mounting cavity (1a) for mounting the load unit (33), a first cooling fan mounting cavity (1b) for mounting the first cooling fan (6), an energy storage unit mounting cavity (1c) for mounting the energy storage unit (53), and a second cooling fan mounting cavity (1d) for mounting the second cooling fan (7). The load unit mounting cavity (1a) is located above the first cooling fan mounting cavity (1b) and has a first vent (11a) at the bottom and a first exhaust port (12a) at the top that communicates with the outside. The second cooling fan mounting cavity (1d) has a second vent (11d) at the bottom and a first exhaust port (12a) at the top that communicates with the outside. The second exhaust vent (12d) is provided. The energy storage unit mounting cavity (1c) is located below the second cooling fan mounting cavity (1d) and adjacent to the first cooling fan mounting cavity (1b). The bottom plate (13) of the load box (1) is provided with a first air inlet (1e). The first air inlet (1e), the first cooling fan mounting cavity (1b), the first vent (11a), the load unit mounting cavity (1a), and the first exhaust vent (12a) constitute the load cooling air duct. The first air inlet (1e), the energy storage unit mounting cavity (1c), the second vent (11d), the second cooling fan mounting cavity (1d), and the second exhaust vent (12d) constitute the energy storage cooling air duct.

4. The resistive energy storage load system for movable testing of a railway APU, according to claim 3, characterized in that: The back plate (10) of the energy storage unit mounting cavity (1c) and the first cooling fan mounting cavity (1b) is provided with a second air inlet (10a), and the partition plate (11) between the energy storage unit mounting cavity (1c) and the first cooling fan mounting cavity (1b) is provided with a ventilation hole (11b).

5. The resistive energy storage load system for movable testing of a railway APU, according to claim 3, characterized in that: The first switch (32) is a first circuit breaker and a contactor, and the second switch (52) is a second circuit breaker. The load box (1) is also divided into a generator cable input cavity (1f) for installing the input connector (2) and an electrical component mounting cavity (1g) for installing the first circuit breaker, the second circuit breaker and the contactor. The input connector (2) is connected to the load unit (33) in the load unit mounting cavity (1a) through the first conductor, the first circuit breaker and the contactor in the electrical component mounting cavity (1g).

6. The resistive energy storage load system for movable testing of a railway APU, according to claim 5, characterized in that: The load box (1) is also divided into an energy storage unit cable input cavity (1h) and an energy storage unit cable output cavity (1i) which are adjacent to and connected to the energy storage unit mounting cavity (1c). The input connector (2) is connected to the energy storage unit (53) in sequence through the second conductor, the second circuit breaker in the electrical component mounting cavity (1g), and the energy storage input connector (56) located in the energy storage unit cable input cavity (1h). The energy storage output connector (55) is located in the energy storage unit cable output cavity (1i).

7. The resistive energy storage load system for movable test of a railway APU, according to any of claims 1 to 6, characterized in that: The load box (1) is equipped with a power monitoring instrument (12) that can monitor and display the total power of the generator set test. The first control unit (31) includes a programmable logic controller (PLC) (311) and a human-machine interface (HIMI) (312) connected to the PLC (311). The PLC (311) can control the first switch (32) to be turned on or off according to the power value input in the HIMI (312). The energy storage unit (53) is a battery pack. The second control unit (51) includes a battery management system (BMS) (511) that can manage the storage or release of electrical energy of the battery pack and a display screen (512) that can display the battery pack parameters collected by the BMS (511).

8. The resistive energy storage load system for movable test of a railway APU, according to any one of claims 1 to 6, characterized in that: The load unit (33) includes an alloy resistor group consisting of an integer multiple of 3 alloy resistors (331), a heat sink (332) disposed outside the alloy resistor group, and an insulating medium filled between each alloy resistor (331) and the heat sink (332).

9. The resistive energy storage load system for movable testing of a railway APU, according to claim 8, characterized in that: In the alloy resistor group, the topmost alloy resistor (331) is arranged vertically, and the remaining alloy resistors (331) are arranged in a matrix at a 45° angle to the horizontal direction.

10. The resistive energy storage load system for movable testing of a railway APU, according to claim 8, characterized in that: Each of the alloy resistors (331) is detached and connected to the heat sink (332) via its respective support plate (333).

Images