Double-voltage energy storage unit multi-working condition coordinated regulation system and method for magnetic suspension test bed

Abstract

The application discloses a kind of magnetic suspension test bench double-voltage energy storage unit multi-working condition coordinated control system and method, it is related to magnetic suspension test bench energy storage management technical field, the system includes four working condition intelligent identification module, double-voltage grade energy storage acquisition module, working condition charging and discharging control module, load-energy storage power linkage module, graded protection threshold dynamic adjustment module and data interaction module, adapt magnetic suspension test bench DC330V / DC110V double-specification energy storage unit, four typical working conditions of standby, debugging, full load test, power-off emergency of test bench can be automatically identified, for double energy storage unit configuration differentiation charging and discharging strategy, power matching logic and protection threshold, while establishing the real-time linkage model of energy storage output and load power consumption.The application realizes the deep cooperation of energy storage unit and magnetic suspension test bench working condition, battery cycle service life is extended by more than 20%, greatly improve the intelligentialization and reliability of magnetic suspension test bench power supply system.

Description

Technical Field

[0001] This invention relates to the field of energy storage management technology for magnetic levitation test benches, and in particular to a multi-condition coordinated control system and method for dual-voltage energy storage units in magnetic levitation test benches. It is applicable to magnetic levitation research test benches with stringent requirements for the coordination between energy storage units and test conditions, the accuracy of emergency endurance, and battery life. It can also be applied to industrial equipment with multi-condition mobile high-voltage power supply and dual-voltage level energy storage coordinated power supply. Background Technology

[0002] The energy storage unit of the magnetic levitation test bench serves as the emergency core of the ground-vehicle dual power supply system. It adopts dual-specification DC330V and DC110V battery packs to provide emergency power for critical loads such as levitation drive, control, speed measurement and positioning. Its management effect directly determines the power supply reliability, emergency endurance and battery life of the test bench.

[0003] Existing magnetic levitation test benches mostly use general-purpose battery management systems (BMS) for energy storage unit management. These systems lack customized designs for the multi-condition characteristics of magnetic levitation test benches, including standby, commissioning, full-load testing, and power outage emergencies. This results in a significant disconnect between the system and the test bench's operating conditions, leading to several technical shortcomings: First, they lack operational condition identification capabilities, failing to automatically identify conditions based on the test bench's running status. The charging and discharging strategies use a fixed, one-size-fits-all approach. In standby mode, high-current float charging easily causes overcharging and premature battery aging. In commissioning mode, full-capacity operation easily leads to frequent charging and discharging, significantly reducing cycle life. Second, the linkage between energy storage and load is poor. There is no real-time power matching model, and the energy storage unit's output current and voltage are fixed values. When the test bench's load power consumption changes, output mismatch easily occurs, resulting in voltage and current fluctuations. The system suffers from several drawbacks: First, it is unstable, affecting the control precision of the test bench and the accuracy of test data. Second, the emergency endurance management precision is low, with only a simple discharge rate limit set, without a precise constant current discharge strategy designed according to the actual load power consumption of the test bench. This fails to guarantee the quantitative requirement of stable operation of the magnetic levitation system for ≥1 minute after a power outage, leaving insufficient time for emergency test handling. Third, the protection thresholds are fixed and not dynamically adjusted according to the test conditions. The stringent temperature protection thresholds under debugging conditions are prone to false protection, cutting off the energy storage circuit and causing test interruption. There is no strategy to relax the protection thresholds under power outage emergency conditions, making it impossible to balance battery safety and emergency endurance. Fourth, the data interaction and operation and maintenance capabilities are insufficient. It can only collect basic battery voltage and current parameters and cannot achieve multi-dimensional data fusion monitoring of test conditions, energy storage status, and load power consumption, making fault location difficult and operation and maintenance inefficient.

[0004] Furthermore, existing energy storage management systems suffer from poor communication and coordination with the main control system of the magnetic levitation test rig and the ground-vehicle dual power supply system. The lack of standardized communication interfaces and linkage logic means that the protection actions of the energy storage units cannot trigger the power supply system's operating condition switching, easily leading to the propagation of single faults and affecting the overall operational stability of the test rig. Therefore, there is an urgent need for a dual-voltage-level energy storage unit collaborative control system and method tailored to the multi-condition characteristics of the magnetic levitation test rig, achieving deep coordination between the energy storage units and the test conditions and load power consumption, thus addressing the core pain points of existing technologies. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-condition collaborative control system and method for dual-voltage energy storage units in magnetic levitation test benches. This system addresses the technical problems existing in the management of energy storage units in magnetic levitation test benches, such as lack of condition identification, fixed charging and discharging strategies, poor load-energy storage linkage, low accuracy of emergency power supply control, and lack of condition adaptability of protection thresholds. The invention achieves intelligent identification of test conditions, dynamic condition-based control of charging and discharging strategies, precise matching of energy storage and load power, dynamic adjustment of protection thresholds, and quantitative guarantee of emergency power supply in the event of a power outage. This improves the synergy between the energy storage unit and the magnetic levitation test bench, the stability of power supply, and the lifespan of the battery, thereby enhancing the emergency response capability of the test bench.

[0006] To achieve the above objectives, the present invention provides the following technical solution: According to one aspect of the present invention, a multi-condition coordinated control system for a dual-voltage energy storage unit of a magnetic levitation test rig is provided. The system is compatible with both DC330V and DC110V dual-specification energy storage units of the magnetic levitation test rig and communicates and coordinates with the main control system of the magnetic levitation test rig and the ground-vehicle dual power supply system. The system includes: The four-condition intelligent identification module communicates with the main control system of the magnetic levitation test bench and is used to collect the load power consumption, running instructions and operation status parameters of the test bench, and automatically identify four test conditions: standby, debugging, full load test and power failure emergency. The dual-voltage-level energy storage acquisition module is electrically connected to the DC330V energy storage unit and the DC110V energy storage unit respectively, and is used to synchronously acquire the cell voltage, current, temperature, remaining capacity and discharge rate parameters of the two energy storage units. The working condition-based charge and discharge control module is connected to the four-working-condition intelligent identification module and the dual-voltage-level energy storage acquisition module, respectively. It has built-in differentiated charge and discharge strategies corresponding to four working conditions, which are used to dynamically execute float charge, equalization charge, microcurrent charge and constant current discharge control actions according to the identified test working conditions and energy storage unit status. The load-energy storage power linkage module is connected to the load end of the magnetic levitation test bench, the dual-voltage level energy storage acquisition module, and the working condition-based charge and discharge control module, respectively, to establish a real-time linkage model between energy storage output and load power consumption. This model is used to dynamically adjust the output current and voltage of the energy storage unit to achieve precise matching with the load power consumption. The graded protection threshold dynamic adjustment module is connected to the dual-voltage level energy storage acquisition module and the four-condition intelligent identification module. It has built-in temperature and electrical parameter protection thresholds corresponding to different test conditions, which are used to dynamically adjust the protection thresholds according to the test conditions to realize condition-based graded protection of the energy storage unit. The data interaction module integrates CAN / RS485 dual communication interfaces and supports the Modbus protocol. It is used to realize data transmission between modules, local / remote parameter setting, status monitoring and fault alarm. The main control module, as the system control center, is used to issue instructions, perform logical operations, determine operating conditions, and implement linkage control for each module.

[0007] According to an embodiment of the present invention, the working condition determination threshold of the four-working-condition intelligent identification module specifically includes: Standby mode: When the magnetic levitation test bench has no running command, the overall load power consumption is ≤1kW and the duration is ≥3s; Commissioning conditions: The magnetic levitation test bench is in the parameter commissioning state, with an overall load power consumption of 1kW-8kW, and the levitation drive module is not operating at full load; Full load test condition: The magnetic levitation test bench is in the formal test state, with an overall load power consumption of 8kW-14.8kW, and the levitation drive module is running at full load; Power outage emergency conditions: The ground-vehicle dual power supply system has a DC1500V input voltage of <1000V for 10ms, with no high-voltage power input.

[0008] According to one embodiment of the present invention, the differentiated charge-discharge strategy built into the operating condition-based charge-discharge control module is as follows: Standby mode: Implement microcurrent float charging strategy, with charging current ≤2A, float charging voltage is the corresponding energy storage unit rated voltage +2%, and maintain remaining capacity ≥95%; Commissioning conditions: Implement a half-capacity equalization charging strategy, with the equalization charging voltage being the rated voltage of the corresponding energy storage unit +3%, maintaining the remaining capacity at 50%-80%, and the charging current ≤26A; Full load test condition: Implement full capacity float charging strategy, float charging voltage is the corresponding energy storage unit rated voltage +5%, maintain remaining capacity ≥95%, charging current ≤52A; Power outage emergency: The charging circuit is disconnected and a constant current discharge strategy is executed. The DC330V energy storage unit discharges at a constant current of 42A, and the DC110V energy storage unit discharges at a constant current of 29A. The total power consumption is matched with 12kW (DC330V) + 2.8kW (DC110V).

[0009] According to one embodiment of the present invention, the linkage model of the load-energy storage power linkage module is as follows: the real-time power consumption of each load (suspension controller, air compressor, vehicle control equipment) of the magnetic levitation test bench is collected at a frequency of 100ms / time, and the output current and voltage of the energy storage unit are dynamically adjusted through the power-current conversion algorithm. The matching error between the output parameters and the load power consumption is ≤±1A / ±2V to avoid voltage and current fluctuations.

[0010] According to one embodiment of the present invention, the condition-based protection threshold of the graded protection threshold dynamic adjustment module is: Temperature graded protection: Under standby / full load test conditions, the first-level protection threshold is 55℃ and the second-level protection threshold is 60℃; under debugging conditions, the first-level protection threshold is 60℃ and the second-level protection threshold is 65℃; under power failure emergency conditions, the first-level protection threshold is locked at 60℃ and the second-level protection threshold is 65℃, prioritizing the protection of battery life. Electrical parameter graded protection: DC330V energy storage unit overvoltage threshold 346V, undervoltage threshold 290V; DC110V energy storage unit overvoltage threshold 137.5V, undervoltage threshold 97V, overcurrent threshold 52A; under commissioning / power outage emergency conditions, the overcurrent threshold can be relaxed to 55A, duration ≤30s.

[0011] According to one embodiment of the present invention, the dual-voltage-level energy storage acquisition module includes a DC330V acquisition unit and a DC110V acquisition unit, both equipped with an LV25-P voltage sensor, an LA25-NP current sensor, and a PT100 temperature sensor. The DC330V acquisition unit is compatible with 103 series-connected 3.2V lithium iron phosphate cells, and the DC110V acquisition unit is compatible with 34 series-connected 3.2V lithium iron phosphate cells. Both can realize two-level data acquisition at the single cell and battery pack levels.

[0012] According to one embodiment of the present invention, the system is further configured with a power supply module, which is connected to the DC110V power supply terminal of the magnetic levitation test bench, with an operating voltage range of 97V-137.5V, and has reverse connection, overvoltage / undervoltage protection functions, conversion efficiency >90%, providing a stable 5V / 12V power supply for each module.

[0013] On the other hand, the present invention also provides a method for multi-condition coordinated control of a dual-voltage energy storage unit for a magnetic levitation test bench, comprising the following steps: S1. System Initialization and Self-Test: When the control system is powered on, each module completes register configuration and communication handshake. The dual-voltage level energy storage acquisition module initializes acquisition parameters, the graded protection threshold dynamic adjustment module loads the default protection threshold, and the main control module performs self-tests on the hardware status and communication connection status of each module. If a fault is detected, an audible and visual alarm is triggered and the fault code is recorded, and the system is locked. If the status is normal, it enters standby monitoring mode. S2. Intelligent identification of test conditions: The four-condition intelligent identification module collects the load power consumption, running instructions and operation status parameters of the main control system of the magnetic levitation test bench at a frequency of 50ms / time. Through the condition judgment algorithm of the main control module, it automatically identifies whether the current condition is standby, debugging, full load test or power failure emergency condition, and sends the condition information to each module. S3. Real-time acquisition of energy storage status: The dual-voltage level energy storage acquisition module synchronously acquires the cell voltage, current, temperature, remaining capacity and discharge rate parameters of DC330V and DC110V energy storage units at a frequency of 100ms / time. After filtering, the data is sent to the main control module, the working condition-based charge and discharge control module and the load-energy storage power linkage module. S4. Load-Energy Storage Power Precise Matching: The load-energy storage power linkage module collects the real-time power consumption of each load on the magnetic levitation test bench, calculates the optimal output parameters of the energy storage unit through the linkage model, and sends them to the working condition-based charge and discharge control module as the basis for charge and discharge control. S5. Dynamic charging and discharging control under specific operating conditions: The dynamic charging and discharging control module dynamically executes the corresponding charging and discharging strategy based on the identified test conditions, the real-time status of the energy storage unit, and the optimal output parameters of the load-energy storage power linkage module. It adjusts the charging / discharging current and voltage of the energy storage unit to achieve dual adaptation with the test conditions and load power consumption. S6. Dynamic adjustment of protection threshold and graded protection: The graded protection threshold dynamic adjustment module automatically loads the corresponding temperature and electrical parameter protection thresholds according to the current test conditions. The main control module compares the energy storage acquisition parameters with the protection thresholds in real time. If the first-level protection is triggered, it executes current reduction and early warning actions and uploads the early warning information. If the second-level protection is triggered, it immediately cuts off the corresponding circuit of the energy storage unit, triggers the audible and visual alarm and records the fault code, and links the ground-vehicle dual power supply system to perform the working condition switch. S7. Power Outage Emergency Endurance Guarantee: When a power outage emergency is detected, the main control module immediately sends a command to the condition-based charge and discharge control module to cut off the charging circuit and start the constant current discharge strategy. The DC330V energy storage unit supplies power to the suspension controller and air compressor, and the DC110V energy storage unit supplies power to the vehicle control equipment and low-voltage loads. The load-energy storage power linkage module matches the load power consumption in real time to ensure stable operation of the magnetic levitation system for ≥1 minute. If the energy storage unit voltage drops to the undervoltage threshold or the endurance time reaches 1 minute, the undervoltage protection is triggered, and the discharge circuit is cut off. S8. Data Interaction and Fault Recovery: The data interaction module transmits test conditions, energy storage status, charging and discharging parameters, and protection action information to the local display terminal and the remote monitoring terminal in real time, supporting local / remote parameter settings; after fault troubleshooting, the fault code can be cleared through local reset or remote command, and the system will return to standby monitoring mode.

[0014] According to an embodiment of the present invention, in step S2, the operating condition determination algorithm adopts a multi-parameter fusion determination logic, which combines parameters from three dimensions: load power consumption, running instructions, and high-voltage power supply status, to avoid misjudgment of operating conditions caused by fluctuations in a single parameter.

[0015] According to an embodiment of the present invention, in step S6, the action logic of the graded protection is specifically as follows: Level 1 protection: When the temperature reaches the corresponding operating condition level 1 threshold, or the current reaches 80%-100% of the overcurrent threshold, the charging current is controlled to drop to 50%, triggering a yellow audible and visual warning, and the warning information is uploaded through the data interaction module; Level 2 protection: If the temperature reaches the corresponding level 2 threshold, or the voltage exceeds the overvoltage / undervoltage threshold, or the current exceeds the overcurrent threshold by 100%, the energy storage unit output contactor will be immediately cut off, triggering a red audible and visual alarm. A unique fault code containing the fault type, energy storage unit, fault location, and trigger time will be recorded, and the ground-vehicle dual power supply system will be switched to the backup power supply mode.

[0016] The present invention provides a multi-condition coordinated control system and method for a dual-voltage energy storage unit on a magnetic levitation test bench. Compared with the prior art, the beneficial effects of the present invention are as follows: 1. It pioneered a four-condition intelligent identification and condition-based control system for magnetic levitation test benches, achieving automatic identification of four conditions: standby, debugging, full-load testing, and power failure emergency. It configures differentiated charging and discharging strategies for dual-voltage energy storage units, solving the problem of fixed charging and discharging strategies in existing systems. It avoids overcharging in standby conditions and frequent charging and discharging in debugging conditions, extending battery cycle life by more than 20%.

[0017] 2. A real-time load-energy storage power linkage model was established to achieve precise matching between energy storage output and load power consumption, completely solving the problem of poor linkage between existing energy storage and load, avoiding the impact of voltage and current fluctuations on the control accuracy of the test bench, and improving the accuracy of test data.

[0018] 3. It achieves quantitative and precise control of emergency power outage recovery. A customized constant current discharge strategy is designed for emergency power outage conditions. The discharge current and power are precisely matched according to the actual load power consumption of the test bench to ensure stable operation of the magnetic levitation system for ≥1 minute, providing sufficient time for emergency test handling and solving the core pain point of low accuracy in existing emergency power outage control.

[0019] 4. A dynamic adjustment mechanism for protection thresholds has been established. The corresponding protection thresholds are loaded according to different test conditions. The protection thresholds are appropriately relaxed during debugging to avoid false protection. The relaxed thresholds are locked during power outage emergency conditions to balance endurance and safety. This solves the problem of test interruption caused by the solidification of existing protection thresholds and improves the operational stability of the test bench.

[0020] 5. Achieve deep collaboration between the energy storage unit and the test bench main control system, as well as the ground-vehicle dual power supply system. Protection actions can be linked to the power supply system to switch operating conditions, avoiding the spread of a single fault and forming an integrated collaborative system between energy storage, power supply and test bench, which greatly improves the overall reliability of the magnetic levitation test bench power supply system.

[0021] 6. It realizes multi-dimensional data fusion monitoring and integrated local / remote operation and maintenance, integrates CAN / RS485 dual communication interfaces, realizes real-time transmission of multi-dimensional data such as test conditions, energy storage status and load power consumption, and the fault code includes information such as fault type, location and time. The fault location accuracy is 100%, and the efficiency of installation, commissioning and fault diagnosis is improved by more than 60%, reducing operation and maintenance costs. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of a multi-condition coordinated control system for a dual-voltage energy storage unit on a magnetic levitation test bench, according to an embodiment of the present invention. Figure 2 This is a flowchart of a multi-condition coordinated control method for a dual-voltage energy storage unit on a magnetic levitation test bench, according to an embodiment of the present invention. Detailed Implementation

[0023] To facilitate a clear description of the technical solutions in the embodiments of the present invention, the terms "first" and "second" are used to distinguish identical or similar items with essentially the same function and effect. For example, the first threshold and the second threshold are merely used to distinguish different thresholds and do not limit their order. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and that the terms "first" and "second" are not necessarily different.

[0024] It should be noted that in this invention, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0025] In this invention, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one" or similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, "at least one of a, b, or c" can represent: a, b, c, a combination of a and b, a combination of a and c, a combination of b and c, or a, b, and c, where a, b, and c can be single or multiple.

[0026] like Figure 1 The diagram shows a multi-condition collaborative control system for a dual-voltage energy storage unit on a magnetic levitation test bench. The system includes a four-condition intelligent identification module, a dual-voltage energy storage acquisition module, a condition-based charge and discharge control module, a load-energy storage power linkage module, a graded protection threshold dynamic adjustment module, a data interaction module, a main control module, and a power supply module. Each module achieves internal data interaction through a CAN bus and local / remote operation and maintenance through an RS485 bus.

[0027] The four-condition intelligent identification module is directly connected to the main control system of the magnetic levitation test bench. It is equipped with a high-speed communication interface and collects three core parameters of the test bench at a frequency of 50ms / time: load power consumption, operation command, and high-voltage power supply status. It has built-in multi-parameter fusion judgment logic to automatically identify four conditions: standby, debugging, full load test, and power failure emergency. The identification response time is ≤50ms, and the condition information is sent to each module in real time to provide condition basis for subsequent control.

[0028] The dual-voltage-level energy storage acquisition module consists of two acquisition units: DC330V and DC110V. Both units are equipped with an LV25-P voltage sensor, an LA25-NP current sensor, and a PT100 temperature sensor, with a sampling accuracy of ±0.5% and an acquisition frequency of ≥100ms / time. It can realize two-level data acquisition for single cells and battery packs, simultaneously acquiring cell voltage, current, temperature, remaining capacity, and discharge rate parameters of the two energy storage units (DC330V and DC110V), providing accurate energy storage status data for charge / discharge regulation and protection.

[0029] The working condition-based charge and discharge control module is the core control module of the system. It has built-in differentiated charge and discharge strategies corresponding to four working conditions. It receives working condition information from the four-working-condition intelligent identification module, energy storage status information from the dual-voltage level energy storage acquisition module, and power matching parameters from the load-energy storage power linkage module. Through the logic operation of the main control module, it dynamically adjusts the charging / discharging current and voltage of the energy storage unit to achieve triple adaptation of the charge and discharge strategy with the test working conditions, energy storage status, and load power consumption, ensuring the rationality of battery charging and discharging.

[0030] The load-energy storage power linkage module is electrically connected to each load end of the magnetic levitation test bench. It collects the real-time power consumption of the loads of the levitation controller, air compressor, and vehicle control equipment, establishes a real-time linkage model of energy storage output and load power consumption, and calculates the optimal output parameters of the energy storage unit through a power-current conversion algorithm. The parameters are then sent to the working condition-based charge and discharge control module to ensure that the energy storage output and load power consumption are accurately matched with a matching error of ≤±1A / ±2V, thus avoiding voltage and current fluctuations.

[0031] The graded protection threshold dynamic adjustment module has built-in temperature and electrical parameter protection thresholds corresponding to different test conditions. Based on the operating condition information of the four-condition intelligent identification module, it dynamically adjusts the protection thresholds to realize condition-based graded protection of the energy storage unit. At the same time, it compares the energy storage collected parameters with the protection thresholds in real time, and executes corresponding current reduction, warning, and power-off actions when protection is triggered, taking into account both battery safety and test bench operation stability.

[0032] The data interaction module integrates CAN / RS485 dual communication interfaces, supports the Modbus protocol, and has a configurable baud rate of 9600bps-115200bps, enabling high-speed data transmission between modules. It also supports parameter setting, status monitoring, and fault alarms on both local display terminals (LCD screen, physical buttons) and remote monitoring terminals. The local display terminal can display test conditions, energy storage status, and charging and discharging parameters in real time, while the remote monitoring terminal supports remote parameter modification and remote fault reset.

[0033] The main control module uses an STM32 high-performance controller with an operation frequency of ≥400MHz. As the system control center, it realizes the instruction issuance, logical operation, working condition judgment and linkage control of each module, with an instruction issuance delay of <5ms.

[0034] The power supply module is connected to the DC110V power supply terminal of the magnetic levitation test bench. The operating voltage range is 97V-137.5V. It converts DC110V to a stable 5V / 12V voltage to power each module. It has reverse connection, overvoltage / undervoltage protection functions to ensure the stability of the system's own power supply.

[0035] like Figure 2As shown, a flowchart of a multi-condition collaborative control method for a dual-voltage energy storage unit on a magnetic levitation test bench is presented. This method includes eight core steps: system initialization and self-test, intelligent identification of test conditions, real-time acquisition of energy storage status, precise matching of load and energy storage power, dynamic control of charging and discharging under specific conditions, dynamic adjustment of protection thresholds and graded protection, emergency power outage protection, and data interaction and fault recovery. Each step is executed sequentially to achieve multi-condition collaborative control of the energy storage unit. The specific steps are as follows: Step S1: System Initialization and Self-Test When the control system is powered on, each module completes register configuration and CAN / RS485 communication handshake. The dual-voltage level energy storage acquisition module initializes sensor parameters, and the graded protection threshold dynamic adjustment module loads the default protection threshold under full-load test conditions. The main control module performs a comprehensive self-check on the hardware status (sensors, communication interfaces, execution circuits) and communication connection status of each module. If a fault is detected, a red audible and visual alarm is triggered, a unique fault code is recorded, and the system enters a fault-locked state. If all statuses are normal, the green audible and visual indicator light remains on, and the system enters standby monitoring mode.

[0036] Step S2, Intelligent Identification of Test Conditions: The four-condition intelligent identification module collects the load power consumption, operation commands, and DC1500V high-voltage power supply status parameters of the main control system of the magnetic levitation test bench at a frequency of 50ms / time, and uploads the data to the main control module. The main control module automatically determines the current test condition by combining the parameters of the three dimensions through multi-parameter fusion judgment logic. The judgment result is sent to various modules such as the condition-based charge and discharge control module and the graded protection threshold dynamic adjustment module in real time, so as to avoid misjudgment of the test condition caused by fluctuation of a single parameter.

[0037] Step S3: Real-time acquisition of energy storage status: The dual-voltage-level energy storage acquisition module synchronously acquires the single-cell voltage, total battery pack voltage, charging / discharging current, cell temperature, remaining capacity (SOC), and discharge rate parameters of the DC330V and DC110V energy storage units at a frequency of 100ms / time. After the acquired data is processed by the RC filter circuit, it is sent to the main control module, the working condition-based charge and discharge control module, and the load-energy storage power linkage module in real time to ensure the real-time performance and accuracy of the energy storage status data.

[0038] Step S4, precise matching of load and energy storage power: The load-energy storage power linkage module collects the real-time power consumption of each load on the magnetic levitation test bench at a frequency of 100ms / time. It performs power-current conversion calculations through the real-time linkage model of energy storage output-load power consumption to obtain the optimal output current and voltage parameters of the energy storage unit. The parameters are then sent to the working condition-based charge and discharge control module as the basis for charge and discharge control, so as to achieve precise matching between energy storage output and load power consumption.

[0039] Step S5, Dynamic Control of Charge and Discharge under Operating Conditions: The working condition-based charge and discharge control module receives test working condition information, energy storage status information, and optimal output parameters. Based on the built-in differentiated charge and discharge strategy, it dynamically adjusts the charging / discharging current and voltage of the energy storage unit: micro-current float charging is performed in standby mode, half-capacity equalization charging is performed in debugging mode, full-capacity float charging is performed in full-load test mode, and constant current discharge is performed in power failure emergency mode. This achieves triple adaptation of the charge and discharge strategy with test working conditions, energy storage status, and load power consumption, avoiding battery overcharging, over-discharging, and frequent charge and discharge.

[0040] Step S6: Dynamic adjustment of protection threshold and graded protection: The tiered protection threshold dynamic adjustment module automatically loads the corresponding temperature and electrical parameter protection thresholds based on the current test conditions; the main control module compares the real-time collected energy storage parameters with the protection thresholds and executes tiered protection actions accordingly. When the first-level protection is triggered, the charging current is reduced to 50%, a yellow audible and visual warning is triggered, and the warning information is uploaded. When the secondary protection is triggered, the output contactor of the energy storage unit is immediately disconnected, a red audible and visual alarm is triggered, a unique fault code is recorded, and the ground-vehicle dual power supply system is switched to the backup power supply mode to prevent the fault from spreading.

[0041] Step S7, Emergency Power Outage Resumption Guarantee: When a power outage emergency is detected, the main control module immediately sends an emergency command. The condition-based charge and discharge control module cuts off the charging circuit and starts a constant current discharge strategy. The DC330V energy storage unit supplies power to the suspension controller and air compressor with a constant current of 42A, and the DC110V energy storage unit supplies power to the vehicle control equipment and low-voltage load with a constant current of 29A. The total power consumption is matched to 12kW (DC330V) + 2.8kW (DC110V). The load-energy storage power linkage module matches the load power consumption in real time to ensure that the magnetic levitation system operates stably for ≥1 minute. If the energy storage unit voltage drops to the undervoltage threshold (DC330V-290V / DC110V-97V) or the driving time reaches 1 minute, the undervoltage secondary protection is immediately triggered to cut off the discharge circuit and prevent the battery from being over-discharged.

[0042] Step S8, Data Interaction and Fault Recovery: The data interaction module transmits test conditions, energy storage status, charging and discharging parameters, protection action information, and fault codes to the local display terminal and the remote monitoring terminal in real time. The local display terminal refreshes the data in real time, and the remote monitoring terminal can realize multi-dimensional data visualization. Staff can set parameters through local physical buttons or the remote monitoring terminal. After the fault is cleared, the fault code is cleared through the local reset button or the remote reset command, and the system returns to the standby monitoring mode, waiting for the next condition identification and control.

[0043] Example 1: Hardware structure details of a multi-condition collaborative control system; This embodiment discloses the specific hardware structure of the multi-condition collaborative control system for the dual-voltage energy storage unit of the magnetic levitation test bench. It is compatible with dual-specification energy storage units of the magnetic levitation test bench: 52Ah DC330V (103 3.2V lithium iron phosphate cells in series) and 52Ah DC110V (34 3.2V lithium iron phosphate cells in series). It communicates and coordinates with the test bench's TI TMS320F28335 main control system and the ground-vehicle dual power supply system. The specific hardware parameters of each module are as follows: The four-condition intelligent identification module adopts a high-speed CAN transceiver TJA1050, which is directly connected to the CAN2.0 bus of the test bench main control system. It has a baud rate of 500kbps, a sampling frequency of 50ms / time, and a built-in STM32F103C8T6 microcontroller to realize multi-parameter fusion judgment logic. The condition identification response time is 40ms and the false judgment rate is 0.05%.

[0044] The DC330V acquisition unit of the dual-voltage-level energy storage acquisition module is equipped with an LV25-P voltage sensor (measurement range 290V-346V), an LA25-NP current sensor (measurement range 0-100A), and a PT100 temperature sensor (measurement range -50℃-200℃), providing 16 cell voltage acquisition channels with a sampling accuracy of ±0.5% and a acquisition frequency of 100ms / time. The DC110V acquisition unit of the dual-voltage-level energy storage acquisition module is equipped with the same sensor specifications, providing 8 cell voltage acquisition channels with a sampling accuracy of ±0.5% and a acquisition frequency of 100ms / time. The main control chip of the dual-voltage-level energy storage acquisition module uses the STM32H743IIK6 to realize data acquisition, processing, and transmission.

[0045] The working condition-based charge and discharge control module is equipped with a high-speed optocoupler isolated output circuit (6N137, response time <1μs) and a relay execution circuit (Schneider LC1D series, DC110V), which is electrically connected to the output contactor of the charger and energy storage unit. It can realize continuous adjustment of charging current 0-52A and discharging current 0-52A, and voltage regulation accuracy ±0.5V.

[0046] Load-energy storage power linkage module: Equipped with a power sensor (accuracy ±0.2%, measurement range 0-20kW), electrically connected to each load end of the magnetic levitation test bench, it collects the real-time power consumption of the levitation controller, air compressor, and vehicle control equipment. It has a built-in power-to-current conversion algorithm with a calculation time of <3ms and an output parameter matching error of ±0.8A / ±1.5V.

[0047] The graded protection threshold dynamic adjustment module has a built-in threshold comparison circuit, pre-stores protection thresholds for four operating conditions, and is equipped with an AD7606 digital-to-analog converter chip (16-bit precision) to achieve accurate comparison between analog acquisition parameters and digital protection thresholds, with a protection action trigger delay of <2ms.

[0048] Data interaction module: integrates CAN transceiver TJA1050 and RS485 transceiver MAX485, supports Modbus RTU protocol, baud rate configurable from 9600bps to 115200bps; local display terminal is a 7-inch LCD screen + 6 physical buttons, which can display data and set parameters in real time; remote communication distance ≤1000m, no data packet loss.

[0049] The main control module uses an STM32H743IIK6 controller with an operating frequency of 480MHz, 1MB Flash and 512KB RAM. It supports multi-channel data acquisition and high-speed command issuance with a command issuance delay of 3ms. The power supply module adopts a DC-DC conversion module with an input of DC97V-137.5V and an output of 5V / 3A and 12V / 2A. The conversion efficiency is >90%, and it has protection functions against reverse connection, overvoltage (137.5V), and undervoltage (97V).

[0050] Example 2: Specific execution flow of the multi-condition coordinated control method; This embodiment discloses the specific execution flow of the multi-condition coordinated control method for the dual-voltage energy storage unit of a magnetic levitation test bench. Applied to the multi-condition coordinated control system of Embodiment 1, and considering the actual operating conditions of the magnetic levitation test bench, the specific execution details of each step are as follows: S201. System Initialization and Self-Test: Upon power-up of the control system, each module completes register configuration and CAN / RS485 communication handshake. The dual-voltage-level energy storage acquisition module initializes sensor parameters, and the graded protection threshold dynamic adjustment module sets the protection thresholds for the full-load test condition (temperature level 1: 55℃, level 2: 60℃, overcurrent: 52A). The main control module performs self-checks on the hardware status and communication connection status of each module. If a fault such as sensor damage or communication interruption is detected, a red audible and visual alarm is triggered, the fault code is recorded (e.g., "E001-DC330V current sensor fault"), and the system is locked. If the status is normal, the green indicator light remains on, and the system enters standby monitoring mode.

[0051] S202, Intelligent Recognition of Test Conditions: The four-condition intelligent identification module collects parameters from the test bench's main control system at a frequency of 50ms / time: ① Load power consumption: collected by a power sensor; ② Operation commands: test bench standby / debugging / test commands; ③ High voltage power supply status: DC1500V input voltage status; The main control module determines the operating condition through multi-parameter fusion judgment logic: If "no running command, load power consumption 0.5kW, DC1500V normal" is detected, it is determined to be in standby mode; If "debugging command, load power consumption 5kW, DC1500V normal" is detected, it is determined to be in debugging condition; If the test command and load power consumption of 14kW+DC1500V are detected as normal, it is determined to be a full-load test condition. If "DC1500V voltage 800V for 10ms and load power consumption 14.8kW" is detected, it is determined to be a power outage emergency condition; The judgment results are sent to each module in real time.

[0052] S203, Real-time acquisition of energy storage status: The dual-voltage-level energy storage acquisition module synchronously acquires parameters such as single-cell voltage, total battery pack voltage, current, temperature, and remaining capacity of DC330V and DC110V energy storage units at a frequency of 100ms / time. For example, it acquires "DC330V energy storage unit voltage 330V, current 0A, temperature 25℃, SOC 98%; DC110V energy storage unit voltage 110V, current 0A, temperature 24℃, SOC 97%". The data is filtered and then sent to each module.

[0053] S204, Precise matching of load and energy storage power: The load-energy storage power linkage module collects the power consumption of each load on the test bench: "4 suspended controllers 8kW + air compressor 2kW + vehicle control equipment 2kW + 4 low-voltage loads 0.8kW, total power consumption 12.8kW". Through linkage model calculation, the optimal output parameters are obtained: "DC330V energy storage unit output current 39A, voltage 330V; DC110V energy storage unit output current 27A, voltage 110V", and sent to the working condition charging and discharging control module.

[0054] S205, Dynamic regulation of charge and discharge under operating conditions: The condition-based charge / discharge control module executes the corresponding charge / discharge strategy based on the operating condition information, energy storage status, and optimal output parameters: In standby mode: micro-current float charging is performed, with a charging current of 1.5A and a voltage of 336.6V for DC330V and a charging current of 1.8A and a voltage of 112.2V for DC110V, maintaining a SOC ≥ 95%; For commissioning conditions: Perform half-capacity equalization charging, control the SOC to maintain at 60%, DC330V charging current 20A, voltage 339.9V, DC110V charging current 22A, voltage 113.3V; For full-load test conditions: perform full-capacity float charging, DC330V charging current 50A, voltage 346.5V, DC110V charging current 52A, voltage 115.5V, maintaining SOC ≥ 95%; In case of power outage emergency: disconnect the charging circuit and start constant current discharge. The DC330V discharge current is 42A and the voltage is 330V. The DC110V discharge current is 29A and the voltage is 110V. The total power consumption is 14.8kW.

[0055] S206. Dynamic adjustment of protection threshold and graded protection: The tiered protection threshold dynamic adjustment module loads the corresponding threshold according to the operating conditions. The main control module compares the energy storage parameters with the threshold and executes tiered protection. If the cell temperature rises to 60℃ during commissioning: Level 1 protection is triggered, the charging current drops to 10A, the yellow warning light illuminates, and the "DC330V energy storage unit temperature warning" information is uploaded; if the temperature continues to rise to 65℃: Level 2 protection is triggered, the DC330V energy storage unit output contactor is disconnected, the red alarm light illuminates, the fault code is recorded, and the power supply system is switched to vehicle hot standby mode. If the cell temperature rises to 55°C under full load test conditions, it triggers Level 1 protection, the charging current drops to 25A, and a yellow warning is issued; if it rises to 60°C, it triggers Level 2 protection, cuts off the circuit, and links the power supply system.

[0056] S207, Emergency Power Outage Resumption of Operation: Upon identifying a power outage emergency, the main control module immediately sends an emergency command to disconnect the charging circuit and initiate constant current discharge: the DC330V energy storage unit supplies power to the four suspension controllers and the air compressor, with a discharge current of 42A; the DC110V energy storage unit supplies power to the vehicle control equipment and low-voltage loads, with a discharge current of 29A; the load-energy storage power linkage module matches the load power consumption in real time. If a suspension controller stops working and the load power consumption drops to 10.8kW, the DC330V discharge current is immediately adjusted to 33A. In actual testing, this strategy ensures the magnetic levitation system operates stably for 72 seconds, meeting the requirement of ≥1 minute; if the DC330V voltage drops to 290V, undervoltage protection is immediately triggered, disconnecting the discharge circuit.

[0057] S208. Data Interaction and Fault Recovery: The data interaction module transmits operating information, energy storage status, charging and discharging parameters, and protection action information to the local display screen and remote monitoring terminal in real time. If the protection is triggered due to a sensor failure, after the staff replaces the sensor, they can click "local reset" on the touch screen to clear the fault code, stop the alarm, and restore normal operation. If a serious fault occurs (such as a DC330V output short circuit), the main control unit will immediately cut off the main power supply circuit to avoid equipment damage.

[0058] Example 3: System Performance Test Results This embodiment presents a full-condition performance test of the multi-condition collaborative control system and method. The test environment simulates the complex operating conditions of a magnetic levitation test bench (temperature -20℃ to 60℃, humidity 10% to 90%RH, vibration ≤3g). The core test results are as follows: Operating condition recognition performance: The response time for four operating conditions recognition is 35-45ms, all ≤50ms, with a false judgment rate of 0.03%, and no control errors caused by misjudgment of operating conditions; Charge and discharge regulation performance: Under four operating conditions, the charging and discharging current and voltage regulation accuracy is ±0.5A / ±0.5V, with 100% matching degree with the optimal output parameters, and no overcharging or over-discharging phenomenon; Power matching performance: The load-energy storage power matching error is ±0.6A / ±1.2V, and the design specification is ≤±1A / ±2V. The power supply voltage fluctuation of the test bench is ≤±1V, and there is no distortion of test data caused by fluctuation. Emergency endurance performance: Under power outage emergency conditions, the magnetic levitation system can operate stably for 70-75 seconds, far exceeding the quantitative requirement of ≥1 minute, and the battery discharge rate is ≤0.95C, which meets the design requirement of ≤1C. Battery life test: After 1000 charge-discharge cycles, the capacity decay rate of the battery pack regulated by this invention is <4%, which extends the life by more than 20% compared with the capacity decay rate of existing general BMS (25%). Protection performance: dynamic adjustment response time of protection threshold <2ms, accurate triggering of first-level / second-level protection actions, no test interruption caused by error protection, and linkage response time between protection action and power supply system <10ms; Communication and maintenance performance: CAN / RS485 dual bus can work continuously for 720 hours without data packet loss, remote parameter setting response time is <5ms, fault code location accuracy is 100%, and the average fault diagnosis time is ≤30 minutes, which is 65% shorter than traditional technology.

[0059] The present invention relates to a multi-condition collaborative control system and method for dual-voltage energy storage units in magnetic levitation test rigs. With a rationally designed hardware structure and precise software control logic, it can be directly applied to energy storage management in magnetic levitation test rigs. It solves the core technical problem of mismatch between existing general-purpose BMSs and the multi-condition characteristics of test rigs, significantly improving the intelligence, reliability, and emergency response capabilities of the magnetic levitation test rig power supply system, extending the lifespan of the energy storage batteries, and reducing operation and maintenance costs. Furthermore, the condition-based control concept, dual-voltage energy storage collaborative strategy, and load-power linkage model of this invention can be flexibly applied to industrial scenarios involving multi-condition, dual-voltage level energy storage collaborative power supply, such as rail transit, mining machinery, and mobile power generation equipment, demonstrating broad industrial application prospects and high promotional value.

[0060] Although the invention has been described herein in conjunction with various embodiments, those skilled in the art will understand and implement other variations of the disclosed embodiments by reviewing the accompanying drawings, disclosure, and other materials. In this specification, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple components. A single processor or other unit can implement several functions listed in the specification. While certain measures are described in different embodiments, this does not mean that these measures cannot be combined to produce good results.

[0061] Although the invention has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made therein without departing from the spirit and scope of the invention. Accordingly, this specification and drawings are merely illustrative of the invention and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of the invention. Clearly, those skilled in the art can make various alterations and modifications to the invention without departing from its spirit and scope. Thus, if such modifications and modifications fall within the scope of the invention and its equivalents, the invention is also intended to include such modifications and modifications.

Claims

1. A multi-condition coordinated control system for a dual-voltage energy storage unit on a magnetic levitation test bench, characterized in that, The system is compatible with both DC330V and DC110V energy storage units for the magnetic levitation test bench, and communicates and links with the main control system of the magnetic levitation test bench and the ground-vehicle dual power supply system. Specifically, it includes: The four-condition intelligent identification module communicates with the main control system of the magnetic levitation test bench and is used to collect the load power consumption, operation instructions, operation status parameters and DC1500V high-voltage power supply status of the ground-vehicle dual power supply system of the test bench. It automatically identifies four test conditions: standby, debugging, full load test and power failure emergency. The dual-voltage-level energy storage acquisition module is electrically connected to the DC330V energy storage unit and the DC110V energy storage unit respectively, and is used to synchronously acquire the cell voltage, current, temperature, remaining capacity and discharge rate parameters of the two energy storage units. The working condition-based charge and discharge control module is connected to the four-working-condition intelligent identification module and the dual-voltage-level energy storage acquisition module, respectively. It has built-in differentiated charge and discharge strategies corresponding to four working conditions, which are used to dynamically execute float charging, equalization charging, microcurrent charging, and constant current discharge control actions according to the identified test conditions and energy storage unit status. The differentiated charge and discharge strategies include: in standby mode, a microcurrent float charging strategy is executed to maintain the remaining capacity ≥95%; in debugging mode, a half-capacity equalization charging strategy is executed to maintain the remaining capacity 50%-80% to avoid frequent full-capacity charging and discharging; in full-load test mode, a full-capacity float charging strategy is executed to maintain the remaining capacity ≥95%; and in power failure emergency mode, the charging circuit is cut off and a constant current discharge strategy is started. The load-energy storage power linkage module is connected to the load end of the magnetic levitation test bench, the dual-voltage level energy storage acquisition module, and the working condition-based charge and discharge control module, respectively, to establish a real-time linkage model between energy storage output and load power consumption. This model is used to dynamically adjust the output current and voltage of the energy storage unit to achieve precise matching with the load power consumption. The graded protection threshold dynamic adjustment module is connected to the dual-voltage level energy storage acquisition module and the four-condition intelligent identification module. It has built-in temperature and electrical parameter protection thresholds corresponding to different test conditions. It is used to dynamically adjust the protection threshold according to the test conditions to realize condition-based graded protection of the energy storage unit. In the case of power failure emergency, the relaxed threshold is locked to prioritize the protection of the battery life. When the secondary protection is triggered, the ground-vehicle dual power supply system is linked to perform the condition switching. The data interaction module integrates CAN / RS485 dual communication interfaces and supports the Modbus protocol. It is used to realize data transmission between modules, local / remote parameter setting, status monitoring and fault alarm. The main control module, as the system control center, is used to issue instructions, perform logical operations, determine operating conditions, and implement linkage control for each module. The DC330V energy storage unit and the DC110V energy storage unit are physically isolated independent voltage levels, each corresponding to different functional loads. The DC330V energy storage unit supplies power to the suspension controller and air compressor, while the DC110V energy storage unit supplies power to the vehicle control equipment and low-voltage loads.

2. The system according to claim 1, characterized in that, The specific threshold values ​​for determining the operating conditions of the four-condition intelligent identification module include: Standby mode: When the magnetic levitation test bench has no running command, the overall load power consumption is ≤1kW and the duration is ≥3s; Commissioning conditions: The magnetic levitation test bench is in the parameter commissioning state, with an overall load power consumption of 1kW-8kW, and the levitation drive module is not operating at full load; Full load test condition: The magnetic levitation test bench is in the formal test state, with an overall load power consumption of 8kW-14.8kW, and the levitation drive module is running at full load; Power outage emergency conditions: The ground-vehicle dual power supply system has a DC1500V input voltage of <1000V for 10ms, with no high-voltage power input.

3. The system according to claim 1, characterized in that, The differentiated charge / discharge strategy built into the operating condition-based charge / discharge control module is as follows: Standby mode: Implement microcurrent float charging strategy, with charging current ≤2A, float charging voltage is the corresponding energy storage unit rated voltage +2%, and maintain remaining capacity ≥95%; Commissioning conditions: Implement a half-capacity equalization charging strategy, with the equalization charging voltage being the rated voltage of the corresponding energy storage unit +3%, maintaining the remaining capacity at 50%-80%, and the charging current ≤26A; Full load test condition: Implement full capacity float charging strategy, float charging voltage is the corresponding energy storage unit rated voltage +5%, maintain remaining capacity ≥95%, charging current ≤52A; Power outage emergency: The charging circuit is disconnected, and a constant current discharge strategy is executed. The DC330V energy storage unit discharges at a constant current of 42A, and the DC110V energy storage unit discharges at a constant current of 29A.

4. The system according to claim 1, characterized in that, The linkage model of the load-energy storage power linkage module is as follows: real-time power consumption of each load on the magnetic levitation test bench is collected at a frequency of 100ms / time, and the output current and voltage of the energy storage unit are dynamically adjusted through a power-current conversion algorithm.

5. The system according to claim 1, characterized in that, The condition-based protection threshold of the hierarchical protection threshold dynamic adjustment module is: Temperature graded protection: Under standby / full load test conditions, the first-level protection threshold is 55℃ and the second-level protection threshold is 60℃; under commissioning conditions, the first-level protection threshold is 60℃ and the second-level protection threshold is 65℃. In the event of a power outage, the first-level protection threshold is locked at 60℃ and the second-level protection threshold is locked at 65℃ to prioritize ensuring battery life. Electrical parameter graded protection: DC330V energy storage unit overvoltage threshold 346V, undervoltage threshold 290V; DC110V energy storage unit overvoltage threshold 137.5V, undervoltage threshold 97V, overcurrent threshold 52A; under commissioning / power outage emergency conditions, the overcurrent threshold can be relaxed to 55A, duration ≤30s.

6. The system according to claim 1, characterized in that, The dual-voltage-level energy storage acquisition module includes a DC330V acquisition unit and a DC110V acquisition unit, both equipped with an LV25-P voltage sensor, an LA25-NP current sensor, and a PT100 temperature sensor. The DC330V acquisition unit is compatible with 103 series-connected 3.2V lithium iron phosphate cells, while the DC110V acquisition unit is compatible with 34 series-connected 3.2V lithium iron phosphate cells. Both can achieve two-level data acquisition: single cell and battery pack.

7. The system according to claim 1, characterized in that, The system is also equipped with a power supply module, which is connected to the DC110V power supply terminal of the magnetic levitation test bench. The operating voltage range is 97V-137.5V. It has reverse connection and overvoltage / undervoltage protection functions, and the conversion efficiency is >90%, providing a stable 5V / 12V power supply for each module.

8. A method for multi-condition coordinated control of a dual-voltage energy storage unit on a magnetic levitation test bench, used to implement the system described in any one of claims 1 to 7, characterized in that, Includes the following steps: S1. System Initialization and Self-Test: When the control system is powered on, each module completes register configuration and communication handshake. The dual-voltage level energy storage acquisition module initializes acquisition parameters, the graded protection threshold dynamic adjustment module loads the default protection threshold, and the main control module performs self-tests on the hardware status and communication connection status of each module. If a fault is detected, an audible and visual alarm is triggered and the fault code is recorded, and the system is locked. If the status is normal, it enters standby monitoring mode. S2. Intelligent identification of test conditions: The four-condition intelligent identification module collects the load power consumption, running instructions and operation status parameters of the main control system of the magnetic levitation test bench at a frequency of 50ms / time. Through the condition judgment algorithm of the main control module, it automatically identifies whether the current condition is standby, debugging, full load test or power failure emergency condition, and sends the condition information to each module. S3. Real-time acquisition of energy storage status: The dual-voltage level energy storage acquisition module synchronously acquires the cell voltage, current, temperature, remaining capacity and discharge rate parameters of DC330V and DC110V energy storage units at a frequency of 100ms / time. After filtering, the data is sent to the main control module, the working condition-based charge and discharge control module and the load-energy storage power linkage module. S4. Load-Energy Storage Power Precise Matching: The load-energy storage power linkage module collects the real-time power consumption of each load on the magnetic levitation test bench, calculates the optimal output parameters of the energy storage unit through the linkage model, and sends them to the working condition-based charge and discharge control module as the basis for charge and discharge control. S5. Dynamic charging and discharging control under specific operating conditions: The dynamic charging and discharging control module dynamically executes the corresponding charging and discharging strategy based on the identified test conditions, the real-time status of the energy storage unit, and the optimal output parameters of the load-energy storage power linkage module. It adjusts the charging / discharging current and voltage of the energy storage unit to achieve dual adaptation with the test conditions and load power consumption. S6. Dynamic adjustment of protection threshold and graded protection: The graded protection threshold dynamic adjustment module automatically loads the corresponding temperature and electrical parameter protection thresholds according to the current test conditions. The main control module compares the energy storage acquisition parameters with the protection thresholds in real time. If the first-level protection is triggered, it executes current reduction and early warning actions and uploads the early warning information. If the secondary protection is triggered, the corresponding circuit of the energy storage unit will be immediately cut off, an audible and visual alarm will be triggered and the fault code will be recorded, and the ground-vehicle dual power supply system will be linked to perform the working condition switch. S7. Power Outage Emergency Endurance Guarantee: When a power outage emergency is detected, the main control module immediately sends a command to the condition-based charge and discharge control module to cut off the charging circuit and start the constant current discharge strategy. The DC330V energy storage unit supplies power to the suspension controller and air compressor, and the DC110V energy storage unit supplies power to the vehicle control equipment and low-voltage loads. The load-energy storage power linkage module matches the load power consumption in real time to ensure stable operation of the magnetic levitation system for ≥1 minute. If the energy storage unit voltage drops to the undervoltage threshold or the endurance time reaches 1 minute, the undervoltage protection is triggered, and the discharge circuit is cut off. S8. Data Interaction and Fault Recovery: The data interaction module transmits test conditions, energy storage status, charging and discharging parameters, and protection action information to the local display terminal and the remote monitoring terminal in real time, supporting local / remote parameter settings; after fault troubleshooting, the fault code can be cleared through local reset or remote command, and the system will return to standby monitoring mode.

9. The method according to claim 8, characterized in that, In step S2, the operating condition determination algorithm adopts a multi-parameter fusion determination logic, which combines parameters from three dimensions: load power consumption, running instructions, and high-voltage power supply status, to avoid misjudgment of operating conditions caused by fluctuations in a single parameter.

10. The method according to claim 8, characterized in that, In step S6, the specific action logic of the graded protection is as follows: Level 1 protection: When the temperature reaches the corresponding operating condition level 1 threshold, or the current reaches 80%-100% of the overcurrent threshold, the charging current is controlled to drop to 50%, triggering a yellow audible and visual warning, and the warning information is uploaded through the data interaction module; Level 2 protection: If the temperature reaches the corresponding level 2 threshold, or the voltage exceeds the overvoltage / undervoltage threshold, or the current exceeds the overcurrent threshold by 100%, the energy storage unit output contactor will be immediately cut off, triggering a red audible and visual alarm. A unique fault code containing the fault type, energy storage unit, fault location, and trigger time will be recorded, and the ground-vehicle dual power supply system will be switched to the backup power supply mode.

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