Train emergency waiting load calculation method considering dynamic power

Abstract

This invention provides a method for calculating train emergency waiting load considering dynamic power, belonging to the technical field of emergency power supply load calculation for high-speed trains. For train emergency waiting conditions, this invention establishes a unified calculation framework for coordinated power supply from AC power batteries and DC batteries. Under the premise of prioritizing basic load protection, it comprehensively considers the dynamic power change characteristics of the load, real-time remaining power, equipment fault status, and cumulative operating time, forming a complete calculation process from parameter preset, real-time status acquisition, power demand calculation to iterative output of remaining time. This achieves a relatively accurate assessment of emergency oxygen production, emergency air conditioning, and overall remaining waiting time. This invention enables precise calculation of the remaining available time of the load under emergency waiting conditions, providing reference and suggestions for drivers' emergency response.

Description

Technical Field

[0001] This invention relates to the field of emergency power supply load calculation technology for high-speed trains, and in particular to a method for calculating train emergency waiting load that takes into account dynamic power. Background Technology

[0002] During operation, high-speed trains may experience power outages due to overhead contact line failures, high-voltage equipment malfunctions, or other unforeseen circumstances, leading to a failure of the main power supply system. In such cases, the train must enter an emergency standby mode, relying on onboard energy storage devices to provide continuous power to critical loads. This emergency standby mode serves as the last line of defense, ensuring basic survival conditions and safe communication for passengers before the train can move independently or external rescue arrives. According to relevant standards, trains must meet minimum power supply duration requirements under this mode, such as at least 90 minutes for emergency oxygen supply and at least 240 minutes for basic loads including emergency lighting, ventilation, displays, and controls.

[0003] To meet the above requirements, high-speed trains are typically equipped with two types of energy storage devices: one is an AC power battery (hereinafter referred to as "AC power battery"), with a larger capacity, used to support medium-voltage AC loads; the other is a DC battery pack (hereinafter referred to as "DC battery"), with a smaller capacity, used to support low-voltage DC loads. Both work together to ensure power supply during emergency waiting periods. The DC battery must be used throughout the entire rescue waiting process; if its charge is insufficient to support the remaining waiting time, it must be compensated by the AC power battery. Therefore, during emergency waiting periods, accurately calculating the remaining operational time and supported remaining waiting time for each load based on the remaining available charge of both types of batteries and the actual operating characteristics of various loads is a crucial technical issue for ensuring train operation safety and meeting the basic survival needs of passengers.

[0004] Existing technologies mainly focus on traction energy consumption estimation, range analysis, and energy distribution control under emergency self-propelled operation conditions. They primarily establish energy consumption models based on the traction system, while specific calculation methods for auxiliary load power supply capacity under emergency waiting conditions are scarce. Especially in emergency waiting scenarios, the system not only needs to determine whether the basic load duration is met, but also needs to output the remaining available time for emergency oxygen generation, emergency air conditioning, and the overall waiting time to the driver. Furthermore, existing power consumption calculation methods typically employ a static calculation method based on rated power, estimating power consumption according to "fixed power × duration." For example, the "Energy Consumption Distribution Optimization Method and Device for Emergency Self-Propelled Operation of Trains" assumes that the load power remains constant throughout the entire operation, making it difficult to adapt to the power switching characteristics of various loads changing with operating time under emergency waiting conditions, easily leading to errors in the remaining time estimation. The above technologies have the following drawbacks: There is no specific method for calculating the remaining load time for emergency waiting conditions; the segmented dynamic characteristics of load power changing with cumulative operating time are not considered; a basic load priority guarantee mechanism and the compensation calculation relationship between AC power batteries and DC batteries are not established; and the remaining time is not dynamically updated by combining real-time remaining power, effective number of devices, fault status and cumulative start-up time. Summary of the Invention

[0005] To address the aforementioned shortcomings in the existing technology, this invention provides a train emergency waiting load calculation method that considers dynamic power, solving the problem of accurately calculating the remaining power support time and the remaining activation time of the emergency load under emergency waiting conditions.

[0006] To achieve the above objectives, the technical solution adopted by this invention is as follows: a method for calculating train emergency waiting load considering dynamic power, comprising the following steps: S1. Set basic parameters; S2. Obtain the real-time remaining power of the AC power battery and DC power battery, as well as the fault status of the AC power battery and bidirectional charger. S3. Based on the information obtained in S2, calculate the current DC load and the cooling power requirement of the bidirectional charger. S4. Based on the basic parameters set in S1, calculate the power demand for starting the emergency oxygen production / air conditioning load; S5. Based on the power demand for starting the emergency oxygen / air conditioning load and the calculation results of S3, calculate the remaining start time and remaining waiting time. S6. Determine if the total waiting time is still within the constraints. If yes, return to S2. Otherwise, output the remaining start time and remaining waiting time to complete the calculation of the train emergency waiting load.

[0007] The beneficial effects of this invention are as follows: This invention establishes a unified calculation framework for the coordinated power supply of AC power batteries and DC batteries for train emergency waiting conditions. Under the premise of prioritizing the basic load, it comprehensively considers the dynamic power change characteristics of the load, the real-time remaining power, the equipment fault status and the cumulative start-up time, forming a complete calculation process from parameter preset, real-time status acquisition, power demand calculation to the iterative output of remaining time, thereby realizing a relatively accurate assessment of emergency oxygen production, emergency air conditioning and the overall remaining waiting time.

[0008] Further, S3 includes the following steps: S301. Based on the information obtained in S2, calculate the current remaining power demand of the DC battery. ; S302, Based on the current remaining power demand of the DC battery. Calculate the charge gap of the DC battery. ; S303. Determine the DC battery's charge level. If the value is less than 0, then the remaining DC battery power is sufficient to meet the basic load power supply requirements for the remaining emergency waiting time, and no compensation from the AC power battery is needed. The process then proceeds to S4. Otherwise, the DC battery power shortage... If the value is greater than or equal to 0, the remaining power of the DC battery cannot support the remaining waiting time, and compensation needs to be made from the AC power battery, and then enter S304. S304. Calculate the remaining power demand for cooling the bidirectional charger on the AC power battery side. ; S305, Remaining power demand based on AC power battery side bidirectional charger cooling Calculate the amount of electricity that the AC power battery supplies to emergency oxygen production / air conditioning. ; S306, Determine the power supply of the AC power battery to emergency oxygen production / air conditioning. If the value is greater than or equal to 0, then the current AC power battery can guarantee the minimum time requirement for subsequent power supply to the DC load and proceeds to S4; otherwise, if the amount of power that the AC power battery can supply to the emergency oxygen generator / air conditioner is less than 0, then the current AC power battery cannot guarantee the minimum time requirement for subsequent power supply to the DC load and proceeds to S5.

[0009] The beneficial effects of the above-mentioned further scheme are: by calculating the remaining power demand of the DC battery for the basic load and the corresponding power gap during the remaining waiting time, and further calculating the remaining power demand for cooling of the bidirectional charger on the AC power battery side and the power that the AC power battery can supply to emergency oxygen production / air conditioning, the power distribution relationship between various loads under the emergency waiting conditions of the train is more realistically reflected, and the accuracy of calculating emergency oxygen production load, emergency air conditioning load and remaining waiting time is improved.

[0010] Furthermore, the power shortage of the DC battery The expression is as follows:

[0011]

[0012] in, This indicates the DC battery's charge shortage. This indicates the current remaining power demand of the DC battery. This indicates the current remaining charge of the DC battery. Indicates nominal electricity demand. A comprehensive correction factor representing battery temperature, lifespan, and state of charge. This indicates the nominal total duration requirement of the DC battery. This indicates the cumulative time that has been activated for emergency waiting.

[0013] The beneficial effects of the above-mentioned further solutions are: the present invention constructs a collaborative power supply and gap compensation mechanism for AC power batteries and DC direct current batteries, and sets the basic load as the priority protection object, which is conducive to ensuring the minimum power supply duration requirement of the basic load and improving the safety of emergency power supply.

[0014] Furthermore, the AC power battery supplies electricity for emergency oxygen production / air conditioning. The expression is as follows:

[0015]

[0016] in, This indicates the amount of electricity supplied by the AC power battery for emergency oxygen production / air conditioning. This indicates the current remaining charge of the AC power battery. This indicates the DC battery's charge shortage. This indicates the discharge conversion efficiency of the AC power battery. This indicates the remaining power requirement for cooling the bidirectional charger on the AC power battery side. Indicates the number of valid bidirectional chargers. This indicates the total number of bidirectional chargers. This indicates the nominal battery capacity requirement for cooling by the AC power battery bidirectional charger. A comprehensive correction factor representing battery temperature, lifespan, and state of charge. This indicates the nominal total duration requirement of the DC battery. This indicates the cumulative time that has been activated for emergency waiting.

[0017] The beneficial effects of the above-mentioned further solutions are: by comprehensively considering the current remaining power of the AC power battery, the power shortage of the DC battery, the remaining power requirement for cooling the bidirectional charger, the effective number of bidirectional chargers, and the discharge conversion efficiency in the calculation of the power that the AC power battery can supply for emergency oxygen production / air conditioning, this invention can avoid the deviation caused by estimating based solely on the nominal remaining power, thereby improving the authenticity and reliability of the subsequent calculation results of the remaining start time and remaining waiting time.

[0018] Furthermore, step S4 includes the following steps: S401. Based on the basic parameters set in S1, calculate the power demand required for emergency oxygen production load in the current time period. S402. Based on the basic parameters set in S1, calculate the power demand required by the emergency air conditioning load in the current time period.

[0019] The beneficial effect of the above-mentioned further solutions is that, in emergency situations, only one of the emergency oxygen generation and emergency air conditioning equipment can be turned on, requiring separate calculations, which improves the accuracy of the calculations.

[0020] Furthermore, the expression for the power demand required for emergency oxygen production in the current time period is as follows:

[0021] in, This indicates the electricity demand required for emergency oxygen production during the current time period. This indicates the power of the emergency oxygen production load during the current time period. Indicates the current power switching point i Compared to the previous power switching point i -1 time interval, This indicates the time when the emergency oxygen generation equipment has been activated. Indicates the AC power battery discharge conversion efficiency; The expression for the power demand required by the emergency air conditioning load in the current time period is as follows:

[0022] in, This indicates the power demand required by the emergency air conditioning load during the current time period. This indicates the power of the emergency air conditioning load during the current time period. Indicates the current power switching point j Compared to the previous power switching point j -1 time interval, This indicates the time when the emergency air conditioning has been activated.

[0023] The beneficial effects of the above-mentioned further solutions are as follows: Based on the load power, the time interval between power switching points and the discharge conversion efficiency within the current time period, the present invention performs segmented calculations on the power demand of emergency oxygen production load and emergency air conditioning load, which can reflect the dynamic changes of load power with operating time under emergency waiting conditions, avoid the errors caused by traditional fixed power estimation methods, and improve the precision and accuracy of power demand calculation in each time period.

[0024] Furthermore, step S5 includes the following steps: S501, Determine the current remaining power of the AC power battery. Is it greater than the power demand required for emergency oxygen production in the current time period? If so, then the remaining power of the AC power battery is sufficient to meet the power supply needs for the current time period, and the remaining power of the AC power battery is... The time when the emergency oxygen generation equipment has been put into use and the current power switching point i Compared to the previous power switching point i- 1 time interval Perform the update and return to S401; otherwise, check the current remaining charge of the AC power battery. Less than the power demand required for emergency oxygen production in the current time period. The battery power is insufficient to meet the demand for the current time period, and the remaining battery power is calculated to determine how long it can support the current demand. ; S502, the remaining time based on the current power level Calculate the remaining operating time of emergency oxygen production capacity. ; S503, Determine the current remaining power of the AC power battery. Is it greater than the power demand required by the emergency air conditioning load in the current time period? If so, then the remaining power of the AC power battery is sufficient to meet the power supply needs for the current time period, and the remaining power of the AC power battery is... The time when the emergency air conditioning has been activated and current power switching point j Compared to the previous power switching point j -1 time interval Perform the update and return to S402; otherwise, check the current remaining charge of the AC power battery. Less than the power demand required by the emergency air conditioning load in the current time period. It also calculates how long the remaining battery power can last. ; S504, Based on the remaining battery power, how long can it last? Calculate the remaining operating time of the emergency air conditioning load. ; Based on the judgment result of S306, and considering that the remaining power can support the total emergency waiting time requirement, the remaining waiting time is calculated in S505. : ; S506. Based on the judgment result of S306, if the remaining power is insufficient to support the total emergency waiting time requirement, then the remaining waiting time should meet the following: And calculate the remaining waiting time. :

[0025] in, This indicates the remaining power requirement for cooling the bidirectional charger on the AC power battery side. Indicates the number of valid bidirectional chargers. This indicates the total number of bidirectional chargers. This indicates the nominal total duration requirement of the DC battery. This indicates the current remaining power demand of the DC battery. This indicates that the cumulative time for emergency waiting has been activated. This indicates the discharge conversion efficiency of the AC power battery. This indicates the current remaining power of the DC battery.

[0026] The beneficial effects of the above-mentioned further solutions are: the present invention can obtain the remaining start time of emergency oxygen generation load, the remaining start time of emergency air conditioning load, and the remaining waiting time respectively; at the same time, by iteratively updating the remaining power and power switching time parameters, it can dynamically reflect the real-time power supply capability of the train during the emergency waiting process, and improve the accuracy, continuity and engineering applicability of the results output.

[0027] Furthermore, the remaining operating time of the emergency oxygen production load. The expression is as follows:

[0028]

[0029] in, Indicates the current power switching point i Compared to the previous power switching point i -1 time interval, This indicates the nominal maximum operating time of the emergency oxygen generator under emergency waiting conditions. This indicates the power of the emergency oxygen production load during the current time interval.

[0030] Furthermore, the remaining operating time of the emergency air conditioning load. The expression is as follows:

[0031]

[0032] in, This indicates the nominal maximum operating time of the emergency air conditioning equipment under emergency waiting conditions. This indicates the power of the emergency air conditioning load during the current time interval.

[0033] The beneficial effects of the above-mentioned further solutions are: by performing segmented cumulative calculations of the remaining operating time of emergency oxygen generation load and emergency air conditioning load, and further calculating the supportable duration within the last power period that cannot be fully supported, the present invention can more accurately determine the actual operating time of each emergency load under the current remaining power conditions, avoid the deviation caused by using average power approximation calculation, and thus improve the accuracy of load remaining working time assessment. Attached Figure Description

[0034] Figure 1 This is a flowchart of the method of the present invention.

[0035] Figure 2 Flowchart for calculating remaining time for emergency load. Detailed Implementation

[0036] The specific embodiments of the present invention are described below to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they are within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0037] Example like Figure 1 As shown, this invention provides a method for calculating train emergency waiting load considering dynamic power, and its implementation method is as follows: S1. Set basic parameters; In this embodiment, the basic parameters set include: preset maximum battery capacity, conversion efficiency, time constraints, rated power of each load, line data, and other basic parameters.

[0038] S2. Obtain the real-time remaining power of the AC power battery and DC power battery, as well as the fault status of the AC power battery and bidirectional charger. S3. Based on the information obtained in S2, calculate the current DC load and the cooling power requirement of the bidirectional charger. The implementation method is as follows: S301. Based on the information obtained in S2, calculate the current remaining power demand of the DC battery. ; S302, Based on the current remaining power demand of the DC battery. Calculate the charge gap of the DC battery. ; S303. Determine the DC battery's charge level. If the value is less than 0, then the remaining DC battery power is sufficient to meet the basic load power supply requirements for the remaining emergency waiting time, and no compensation from the AC power battery is needed. The process then proceeds to S4. Otherwise, the DC battery power shortage... If the value is greater than or equal to 0, the remaining power of the DC battery cannot support the remaining waiting time, and compensation needs to be made from the AC power battery, and then enter S304. S304. Calculate the remaining power demand for cooling the bidirectional charger on the AC power battery side. ; S305, Remaining power demand based on AC power battery side bidirectional charger cooling Calculate the amount of electricity that the AC power battery supplies to emergency oxygen production / air conditioning. ; S306, Determine the power supply of the AC power battery to emergency oxygen production / air conditioning. If the value is greater than or equal to 0, then the current AC power battery can guarantee the minimum time requirement for subsequent power supply to the DC load and proceeds to S4; otherwise, if the amount of power that the AC power battery can supply to the emergency oxygen generator / air conditioner is less than 0, then the current AC power battery cannot guarantee the minimum time requirement for subsequent power supply to the DC load and proceeds to S5.

[0039] In this embodiment, the power demand calculation of the DC110V load has the highest priority, higher than other loads. When the DC battery power is insufficient to support the emergency waiting time requirement, it needs to be compensated from the remaining power of the power battery. According to formula (1), the current remaining power demand of the DC battery is calculated: (1) in, This indicates the remaining power demand of the DC battery. This represents the nominal electricity demand (kWh). This represents a comprehensive correction factor for battery temperature, lifespan, and state of charge (SOC). This represents the nominal total duration requirement of the DC battery (in minutes). This indicates the cumulative time (in minutes) during which emergency waiting has been activated.

[0040] The charge gap of the DC battery is calculated according to formula (2). : (2) in, This indicates the DC battery's charge deficit (kWh). This indicates the current remaining DC battery capacity (kWh). If The remaining power is sufficient to meet the basic load power supply needs for the remaining emergency waiting time, without the need for AC power battery compensation; if If the current remaining power of the DC battery is insufficient to support the remaining waiting time, compensation from the AC power battery is required.

[0041] The remaining power requirement for cooling the bidirectional charger on the power battery side is calculated according to formula (3): (3) in, This indicates the battery power requirement (kWh) for the bidirectional charger to cool the battery. This indicates the nominal battery capacity requirement (kWh) for cooling the bidirectional charger of the power battery.

[0042] The amount of electricity that the power battery can supply for emergency oxygen production / air conditioning is calculated according to formula (4): (4) in, This indicates the amount of electricity (kWh) that the power battery can supply for emergency oxygen production / air conditioning. Indicates the discharge conversion efficiency of the power battery. Indicates the number of valid bidirectional chargers. This indicates the total number of bidirectional chargers.

[0043] In this embodiment, Indicates the number of valid bidirectional chargers. This represents the total number of bidirectional chargers. This valid count indicates whether a bidirectional charger is lost or faulty. In the absence of a fault, n=N; in the presence of a fault, n=N. <N。

[0044] like This ensures sufficient power to power the DC load. The time requirement necessitates further calculation of the remaining time for emergency oxygen production or emergency air conditioning; if The total power is insufficient to supply power to the DC load. Due to time constraints, it is necessary to calculate the remaining available emergency waiting time.

[0045] S4. Based on the basic parameters set in S1 and the calculation results in S3, calculate the power demand for activating the emergency oxygen generator / air conditioning load. The implementation method is as follows: S401. Based on the basic parameters set in S1, calculate the power demand required for emergency oxygen production load in the current time period. S402. Based on the basic parameters set in S1, calculate the power demand required by the emergency air conditioning load in the current time period.

[0046] In this embodiment, the power demand for emergency oxygen production is calculated as follows: Calculate the power demand required for emergency oxygen production load in the current time period according to formula (5): (5) in, i This indicates the division of emergency oxygen production operations according to equipment start-up and shutdown. i Power switching points ( , m (Total number of power switching points under emergency oxygen production conditions) Indicates the current power switching point i Compared to the previous power switching point i -1 time interval (min), This indicates the power (kW) of the emergency oxygen production load during the current time period. This indicates the power demand (kWh) for the emergency oxygen production load during the current time period.

[0047] In this embodiment, the power demand of the emergency air conditioning load is calculated as follows: Calculate the power demand required by the emergency air conditioning load in the current time period according to formula (6): (6) in, j This indicates the division of emergency oxygen production operations according to equipment start-up and shutdown. j Power switching points ( , z (Total power switching points under emergency air conditioning conditions) Indicates the current power switching point j Compared to the previous power switching point j -1 time interval (min), This indicates the power (kW) of the emergency air conditioning load during the current time period. This indicates the power demand (kWh) of the emergency air conditioning load during the current time period.

[0048] S5. Based on the power demand for activating the emergency oxygen / air conditioning load and the calculation results of S3, calculate the remaining activation time and remaining waiting time. The implementation method is as follows: S501, Determine the current remaining power of the AC power battery. Is it greater than the power demand required for emergency oxygen production in the current time period? If so, then the remaining power of the AC power battery is sufficient to meet the power supply needs for the current time period, and the remaining power of the AC power battery is... The time when the emergency oxygen generation equipment has been put into use and the current power switching point i Compared to the previous power switching point i- 1 time interval Perform the update and return to S401; otherwise, check the current remaining charge of the AC power battery. Less than the power demand required for emergency oxygen production in the current time period. The battery power is insufficient to meet the demand for the current time period, and the remaining battery power is calculated to determine how long it can support the current demand. ; S502, the remaining time based on the current power level Calculate the remaining operating time of emergency oxygen production capacity. ; S503, Determine the current remaining power of the AC power battery. Is it greater than the power demand required by the emergency air conditioning load in the current time period? If so, then the remaining power of the AC power battery is sufficient to meet the power supply needs for the current time period, and the remaining power of the AC power battery is... The time when the emergency air conditioning has been activated and current power switching point j Compared to the previous power switching point j -1 time interval Perform the update and return to S402; otherwise, check the current remaining charge of the AC power battery. Less than the power demand required by the emergency air conditioning load in the current time period. It also calculates how long the remaining battery power can last. ; S504, Based on the remaining battery power, how long can it last? Calculate the remaining operating time of the emergency air conditioning load. ; Based on the judgment result of S306, and considering that the remaining power can support the total emergency waiting time requirement, the remaining waiting time is calculated in S505. : ; S506. Based on the judgment result of S306, if the remaining power is insufficient to support the total emergency waiting time requirement, then the remaining waiting time should meet the following: And calculate the remaining waiting time. :

[0049] in, This indicates the remaining power requirement for cooling the bidirectional charger on the AC power battery side. Indicates the number of valid bidirectional chargers. This indicates the total number of bidirectional chargers. This indicates the nominal total duration requirement of the DC battery. This indicates the current remaining power demand of the DC battery. This indicates that the cumulative time for emergency waiting has been activated. This indicates the discharge conversion efficiency of the AC power battery. This indicates the current remaining power of the DC battery.

[0050] In this embodiment, S3 pre-calculates the amount of electricity that the AC power battery can supply for emergency oxygen production / air conditioning after meeting the DC basic load gap compensation and the bidirectional charger's power demand. This result determines whether S5 enters S505 or S506.

[0051] In this embodiment, as Figure 2 As shown, the remaining time for emergency oxygen production is calculated as follows: judge Is it greater than If so, it means that the remaining power of the current power battery can meet the power supply demand for the current period of time. At this time, the current remaining power of the AC power battery is... , and the current power switching point i Compared to the previous power switching point i- The time interval of 1 is updated as follows: (7) (8) (9) in, This indicates the amount of electricity supplied by the AC power battery for emergency oxygen production / air conditioning. This indicates the electricity demand required for emergency oxygen production during the current time period. This indicates the time when the emergency oxygen generator has been turned on. Indicates the current power switching point i Compared to the previous power switching point i -1 time interval, Indicates the emergency oxygen production load power switching point i +1 and power switching point i The time interval.

[0052] Then return to step S401 to continue the iterative calculation.

[0053] like < If the current power is insufficient to meet the demand for the current time period, calculate the remaining power duration according to formula (10): (10) The remaining operating time for emergency oxygen production is as follows: (11) in, Indicates the current power switching point i Compared to the previous power switching point i -1 time interval, This indicates the nominal maximum operating time of the emergency oxygen generator under emergency waiting conditions. This indicates the power of the emergency oxygen production load during the current time interval.

[0054] In this embodiment, the remaining time for the emergency air conditioning load is calculated as follows: judge Is it greater than If so, it means that the remaining power of the current power battery can meet the power supply demand for the current period of time. At this time, the current remaining power of the AC power battery is... The time when the emergency oxygen generation equipment has been put into use and current power switching point j Compared to the previous power switching point j -1 time interval Updated to: (12) (13) (14) in, This indicates the nominal maximum operating time of the emergency air conditioning equipment under emergency waiting conditions. Indicates the emergency air conditioning load power switching point i +1 and power switching point i The time interval.

[0055] Return to S402 and continue the iterative calculation.

[0056] like < If the current power is insufficient to meet the demand for the current time period, calculate the remaining power's duration according to formula (15): (15) The remaining operating time of the emergency air conditioning load is as follows: (16) in, This indicates the nominal maximum operating time of the emergency air conditioning equipment under emergency waiting conditions. This indicates the power of the emergency air conditioning load during the current time interval.

[0057] In this embodiment, the remaining waiting time is calculated as follows: If the remaining power is sufficient to support the total emergency waiting time requirement, that is: The remaining waiting time is: (17) If the remaining power is insufficient to support the total emergency waiting time requirement, that is: Then the remaining waiting time should satisfy: (18) The remaining waiting time is: (19) S6. Determine if the total waiting time is still within the constraints. If yes, return to S2. Otherwise, output the remaining start time and remaining waiting time to complete the calculation of the train emergency waiting load.

[0058] In summary, compared with existing technologies, this invention establishes a specialized load calculation method for train emergency waiting scenarios. Unlike the calculation method for emergency self-propelled traction energy consumption, it can directly output the remaining working time of emergency loads under emergency waiting conditions. It constructs a collaborative power supply and gap compensation mechanism between AC power batteries and DC batteries, and sets the basic load as the priority protection object, which helps to ensure the minimum power supply duration requirement of the basic load and improves the safety of emergency power supply. Considering the time-segmented operation characteristics of loads such as emergency oxygen generation, emergency air conditioning, air compressors, and bidirectional charger cooling, a dynamic power segmentation calculation method is adopted, improving the accuracy of remaining time calculation. By combining real-time remaining power, equipment fault status, number of available equipment, and cumulative operating time for iterative calculation, it can adapt to emergency waiting needs under different equipment availability combinations, improving the method's adaptability and practicality.

Claims

1. A method for calculating train emergency waiting load considering dynamic power, characterized in that, Includes the following steps: S1. Set basic parameters; S2. Obtain the real-time remaining power of the AC power battery and DC power battery, as well as the fault status of the AC power battery and bidirectional charger. S3. Based on the information obtained in S2, calculate the current DC load and the cooling power requirement of the bidirectional charger. S4. Based on the basic parameters set in S1, calculate the power demand for starting the emergency oxygen production / air conditioning load; S5. Based on the power demand for starting the emergency oxygen / air conditioning load and the calculation results of S3, calculate the remaining start time and remaining waiting time. S6. Determine if the total waiting time is still within the constraints. If yes, return to S2. Otherwise, output the remaining start time and remaining waiting time to complete the calculation of the train emergency waiting load.

2. The train emergency waiting load calculation method considering dynamic power according to claim 1, characterized in that, S3 includes the following steps: S301. Based on the information obtained in S2, calculate the current remaining power demand of the DC battery. ; S302, Based on the current remaining power demand of the DC battery. Calculate the charge gap of the DC battery. ; S303. Determine the DC battery's charge level. If the value is less than 0, then the remaining DC battery power is sufficient to meet the basic load power supply requirements for the remaining emergency waiting time, and no compensation from the AC power battery is needed. The process then proceeds to S4. Otherwise, the DC battery power shortage... If the value is greater than or equal to 0, the remaining power of the DC battery cannot support the remaining waiting time, and compensation needs to be made from the AC power battery, and then enter S304. S304. Calculate the remaining power demand for cooling the bidirectional charger on the AC power battery side. ; S305, Remaining power demand based on AC power battery side bidirectional charger cooling Calculate the amount of electricity that the AC power battery supplies to emergency oxygen production / air conditioning. ; S306, Determine the power supply of the AC power battery to emergency oxygen production / air conditioning. If the value is greater than or equal to 0, then the current AC power battery can guarantee the minimum time requirement for subsequent power supply to the DC load and proceeds to S4; otherwise, if the amount of power that the AC power battery can supply to the emergency oxygen generator / air conditioner is less than 0, then the current AC power battery cannot guarantee the minimum time requirement for subsequent power supply to the DC load and proceeds to S5.

3. The train emergency waiting load calculation method considering dynamic power according to claim 2, characterized in that, The DC battery's charge gap The expression is as follows: in, This indicates the DC battery's charge shortage. This indicates the current remaining power demand of the DC battery. This indicates the current remaining charge of the DC battery. Indicates nominal electricity demand. A comprehensive correction factor representing battery temperature, lifespan, and state of charge. This indicates the nominal total duration requirement of the DC battery. This indicates the cumulative time that has been activated for emergency waiting.

4. The method for calculating train emergency waiting load considering dynamic power according to claim 2, characterized in that, The AC power battery supplies electricity for emergency oxygen production / air conditioning. The expression is as follows: in, This indicates the amount of electricity supplied by the AC power battery for emergency oxygen production / air conditioning. This indicates the current remaining charge of the AC power battery. This indicates the DC battery's charge shortage. This indicates the discharge conversion efficiency of the AC power battery. This indicates the remaining power requirement for cooling the bidirectional charger on the AC power battery side. Indicates the number of valid bidirectional chargers. This indicates the total number of bidirectional chargers. This indicates the nominal battery capacity requirement for cooling by the AC power battery bidirectional charger. A comprehensive correction factor representing battery temperature, lifespan, and state of charge. This indicates the nominal total duration requirement of the DC battery. This indicates the cumulative time that has been activated for emergency waiting.

5. The method for calculating train emergency waiting load considering dynamic power according to claim 2, characterized in that, S4 includes the following steps: S401. Based on the basic parameters set in S1, calculate the power demand required for emergency oxygen production load in the current time period. S402. Based on the basic parameters set in S1, calculate the power demand required by the emergency air conditioning load in the current time period.

6. The train emergency waiting load calculation method considering dynamic power according to claim 5, characterized in that, The expression for the power demand required for emergency oxygen production load in the current time period is as follows: in, This indicates the electricity demand required for emergency oxygen production during the current time period. This indicates the power of the emergency oxygen production load during the current time period. Indicates the current power switching point i Compared to the previous power switching point i -1 time interval, This indicates the time when the emergency oxygen generation equipment has been activated. Indicates the AC power battery discharge conversion efficiency; The expression for the power demand required by the emergency air conditioning load in the current time period is as follows: in, This indicates the power demand required by the emergency air conditioning load during the current time period. This indicates the power of the emergency air conditioning load during the current time period. Indicates the current power switching point j Compared to the previous power switching point j -1 time interval, This indicates the time when the emergency air conditioning has been activated.

7. The train emergency waiting load calculation method considering dynamic power according to claim 5, characterized in that, S5 includes the following steps: S501, Determine the current remaining power of the AC power battery. Is it greater than the power demand required for emergency oxygen production in the current time period? If so, then the remaining power of the AC power battery is sufficient to meet the power supply needs for the current time period, and the remaining power of the AC power battery is... The time when the emergency oxygen generation equipment has been put into use and the current power switching point i Compared to the previous power switching point i- 1 time interval Perform the update and return to S401; otherwise, check the current remaining charge of the AC power battery. Less than the power demand required for emergency oxygen production in the current time period. The battery power is insufficient to meet the demand for the current time period, and the remaining battery power is calculated to determine how long it can support the current demand. ; S502, the remaining time based on the current power level Calculate the remaining operating time of emergency oxygen production capacity. ; S503, Determine the current remaining power of the AC power battery. Is it greater than the power demand required by the emergency air conditioning load in the current time period? If so, then the remaining power of the AC power battery is sufficient to meet the power supply needs for the current time period, and the remaining power of the AC power battery is... The time when the emergency air conditioning has been activated and current power switching point j Compared to the previous power switching point j -1 time interval Perform the update and return to S402; otherwise, check the current remaining charge of the AC power battery. Less than the power demand required by the emergency air conditioning load in the current time period. It also calculates how long the remaining battery power can last. ; S504, Based on the remaining battery power, how long can it last? Calculate the remaining operating time of the emergency air conditioning load. ; Based on the judgment result of S306, and considering that the remaining power can support the total emergency waiting time requirement, the remaining waiting time is calculated in S505. : ； S506. Based on the judgment result of S306, if the remaining power is insufficient to support the total emergency waiting time requirement, then the remaining waiting time should meet the following: And calculate the remaining waiting time. : in, This indicates the remaining power requirement for cooling the bidirectional charger on the AC power battery side. Indicates the number of valid bidirectional chargers. This indicates the total number of bidirectional chargers. This indicates the nominal total duration requirement of the DC battery. This indicates the current remaining power demand of the DC battery. This indicates that the cumulative time for emergency waiting has been activated. This indicates the discharge conversion efficiency of the AC power battery. This indicates the current remaining power of the DC battery.

8. The train emergency waiting load calculation method considering dynamic power according to claim 7, characterized in that, The remaining operating time of the emergency oxygen production load The expression is as follows: in, Indicates the current power switching point i Compared to the previous power switching point i -1 time interval, This indicates the nominal maximum operating time of the emergency oxygen generator under emergency waiting conditions. This indicates the power of the emergency oxygen production load during the current time interval.

9. The train emergency waiting load calculation method considering dynamic power according to claim 7, characterized in that, The remaining operating time of the emergency air conditioning load The expression is as follows: in, This indicates the nominal maximum operating time of the emergency air conditioning equipment under emergency waiting conditions. This indicates the power of the emergency air conditioning load during the current time interval.

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