Train speed-limiting protection method and device based on different residual powers

Abstract

The invention discloses a train speed limiting protection method and device based on different residual powers, and relates to the technical field of train control, and the method comprises the following steps: monitoring each motor converter of a target train, judging the number of the motor converters in an available state, and recording the number as the available number of the motor converters; based on the available number of the motor converters, train balance speeds corresponding to different road slopes are obtained; selecting a road slope, and setting a corresponding train balance speed as a train speed limit value; based on the train speed limit value, speed limit protection is conducted on the target train, so that the speed of the target train is not higher than the train speed limit value. The residual power is judged through the available motor converter, the train balance speeds corresponding to different road gradients are obtained based on the unit operation basic resistance and the unit ramp additional resistance corresponding to the different road gradients, and the corresponding train speed limit values are set, so that speed limit protection is performed on the train.

Description

Technical Field

[0001] The present application relates to the field of train control technology, and in particular to a train speed limit protection method and device based on different residual power. Background Art

[0002] The train control system serves as the control center for the train's traction, braking force and train speed. It converts the traction and braking force reference values ​​and the train's target speed set by the driver into traction and braking references and transmits them to the traction system.

[0003] The train adopts a bogie control method, that is, the two traction motors of a bogie are driven and controlled by a motor inverter module of a traction inverter. The motor inverter module converts the DC link voltage into a three-phase variable frequency power supply with variable voltage and variable frequency to power the traction motor, directly realizing the operation control of the three-phase asynchronous traction motor. During dynamic braking, the motor inverter module can convert the three-phase power generated by the traction motor into DC power to realize reverse power transmission. During the power conversion process, the motor inverter module also has the function of fault detection and protection.

[0004] At present, the traditional automatic speed limit protection function of the train only protects the train system components and train driving safety by limiting the maximum operating speed of the train when a major fault is diagnosed. When the driver needs to manually cut off the motor converter module or the motor converter module has an internal fault, resulting in partial power loss of the train, the automatic speed limit protection measure is not taken. Long-term full-power operation without speed limit may cause motor overheating fault problems.

[0005] Therefore, in order to meet actual needs, a train speed limit protection technology based on different residual power is provided. Summary of the invention

[0006] In view of the defects existing in the prior art, the purpose of the present application is to provide a train speed limit protection method and device based on different residual power, which judges the residual power through the available motor inverter, and then obtains the train balance speed corresponding to different road slopes based on the unit basic running resistance and the unit slope additional resistance corresponding to different road slopes, and sets the corresponding train speed limit value, so as to perform speed limit protection on the train so that the speed of the target train is not higher than the train speed limit value.

[0007] In order to achieve the above objectives, the technical solution adopted by this application is:

[0008] In a first aspect, the present application provides a train speed limit protection method based on different residual power, the method comprising the following steps:

[0009] Monitor each motor converter of the target train, determine the number of motor converters in an available state, and record the number as the available number of motor converters;

[0010] Based on the available number of the motor converters, obtaining the train balance speed corresponding to different road slopes;

[0011] Selecting a road slope, and setting the corresponding train balance speed as the train speed limit;

[0012] Based on the train speed limit value, speed limit protection is performed on the target train so that the speed of the target train does not exceed the train speed limit value.

[0013] Based on the above technical solution, the monitoring of each motor converter of the target train and determining the number of motor converters in an available state, which is recorded as the available number of motor converters, includes the following steps:

[0014] Identifying the operating status of each of the motor converters of the target train;

[0015] When the working state of the motor converter is a charging state or a starting state, determining that the motor converter is in an available state;

[0016] The number of motor converters in an available state is counted and recorded as the available number of motor converters.

[0017] On the basis of the above technical solution, the method of obtaining the train balance speed corresponding to different road slopes based on the available number of the motor converters includes the following steps:

[0018] Based on the vehicle model of the target train, a unit running basic resistance is calculated;

[0019] Based on the road conditions with different slopes, the unit slope additional resistance corresponding to different road slopes is calculated;

[0020] Based on the available number of the motor converters, the unit basic running resistance and the unit slope additional resistance corresponding to different road slopes, the train balance speed corresponding to different road slopes is obtained.

[0021] On the basis of the above technical solution, based on the available number of the motor converters, the unit basic running resistance and the unit slope additional resistance corresponding to different road slopes, obtaining the train balance speed corresponding to different road slopes includes the following steps:

[0022] Based on the available number of the motor inverters, the unit basic running resistance and the unit slope additional resistance corresponding to different slopes, the corresponding traction curve and resistance curve are drawn to obtain the intersection of the curves, and then the train balance speed corresponding to different road slopes is obtained.

[0023] On the basis of the above technical solution, the method is configured with a unit operation basic resistance calculation formula, the unit operation basic resistance calculation formula is:

[0024] w=a+bv+cv 2 ;in,

[0025] a is a first parameter corresponding to the vehicle type of the target train, b is a second parameter corresponding to the vehicle type of the target train, c is a third parameter corresponding to the vehicle type of the target train, and v is the speed of the target train.

[0026] On the basis of the above technical solution, the method is configured with a unit ramp additional resistance calculation formula, the unit ramp additional resistance calculation formula:

[0027] w i =i; where

[0028] i is the slope in thousandths corresponding to the road slope.

[0029] In a second aspect, the present application provides a train speed limit protection device based on different residual power, the device comprising:

[0030] A motor converter monitoring module is used to monitor each motor converter of the target train, determine the number of motor converters in an available state, and record it as the available number of motor converters;

[0031] A train balance speed calculation module, which is used to obtain the train balance speed corresponding to different road slopes based on the available number of motor converters;

[0032] A train speed limit value calculation module, which is used to select a road slope and set the corresponding train balance speed as the train speed limit value;

[0033] A train speed limit protection module is used to perform speed limit protection on a target train based on the train speed limit value so that the speed of the target train does not exceed the train speed limit value.

[0034] On the basis of the above technical solution, the motor converter monitoring module is also used to identify the working status of each motor converter of the target train;

[0035] The motor converter monitoring module is also used to determine that the motor converter is in an available state when the working state of the motor converter is a charging state or a starting state;

[0036] The motor converter monitoring module is also used to count the number of motor converters in an available state, which is recorded as the available number of motor converters.

[0037] On the basis of the above technical solution, the train balance speed calculation module is further used to calculate and obtain the unit running basic resistance based on the vehicle model of the target train;

[0038] The train balance speed calculation module is also used to calculate the unit slope additional resistance corresponding to different road slopes based on road conditions with different slopes;

[0039] The train balance speed calculation module is also used to obtain the train balance speed corresponding to different road slopes based on the available number of the motor inverters, the unit basic running resistance and the unit slope additional resistance corresponding to different road slopes.

[0040] On the basis of the above technical solution, the train balance speed calculation module is also used to draw the corresponding traction curve and resistance curve based on the available number of the motor inverters, the unit basic running resistance and the unit slope additional resistance corresponding to different slopes, obtain the intersection of the curves, and then obtain the train balance speed corresponding to different road slopes.

[0041] Compared with the prior art, the advantages of this application are:

[0042] The present application determines the remaining power through the available motor inverter, and then obtains the train balance speed corresponding to different road slopes based on the unit basic running resistance and the unit slope additional resistance corresponding to different road slopes, and sets the corresponding train speed limit value, thereby performing speed limit protection on the train so that the speed of the target train is not higher than the train speed limit value. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0044] Figure 1 This is an electrical schematic diagram of a motor converter module in a train speed limit protection method based on different residual powers according to an embodiment of the present application;

[0045] Figure 2 It is a traction force and resistance curve diagram under different numbers of motor converter modules remaining in the train speed limit protection method based on different residual power in the embodiment of the present application;

[0046] Figure 3 This is a design diagram of a control and protection logic module in a train speed limit protection method based on different residual power according to an embodiment of the present application;

[0047] Figure 4 This is a design diagram of a control and protection logic module in a train speed limit protection method based on different residual power according to an embodiment of the present application;

[0048] Figure 5 This is a flow chart of the steps of the train speed limit protection method based on different residual power according to an embodiment of the present application;

[0049] Figure 6 This is a structural block diagram of a train speed limit protection device based on different residual power according to an embodiment of the present application. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0051] The embodiments of the present application are further described in detail below in conjunction with the accompanying drawings.

[0052] The embodiment of the present application provides a method and device for speed limit protection of a train based on different residual power. The residual power is judged by an available motor inverter, and then the train equilibrium speed corresponding to different road slopes is obtained based on the unit basic running resistance and the unit slope additional resistance corresponding to different road slopes, and the corresponding train speed limit value is set, so as to perform speed limit protection on the train so that the speed of the target train is not higher than the train speed limit value.

[0053] In order to achieve the above technical effects, the overall idea of ​​this application is as follows:

[0054] A train speed limit protection method based on different residual power, the method comprising the following steps:

[0055] S1. Monitor each motor converter of the target train, determine the number of motor converters in an available state, and record it as the available number of motor converters;

[0056] S2. based on the available number of motor converters, obtaining the train balance speed corresponding to different road slopes;

[0057] S3, select a road slope, and set the corresponding train balance speed as the train speed limit;

[0058] S4. Based on the train speed limit value, speed limit protection is performed on the target train so that the speed of the target train does not exceed the train speed limit value.

[0059] The embodiments of the present application are further described in detail below in conjunction with the accompanying drawings.

[0060] First, see Figures 1 to 5 As shown, an embodiment of the present application provides a train speed limit protection method based on different residual power, the method comprising the following steps:

[0061] S1. Monitor each motor converter of the target train, determine the number of motor converters in an available state, and record it as the available number of motor converters;

[0062] S2. based on the available number of motor converters, obtaining the train balance speed corresponding to different road slopes;

[0063] S3, select a road slope, and set the corresponding train balance speed as the train speed limit;

[0064] S4. Based on the train speed limit value, speed limit protection is performed on the target train so that the speed of the target train does not exceed the train speed limit value.

[0065] It should be noted that, in actual implementation, a road slope with a slope value of 5‰ is selected, and the corresponding train balance speed is set as the train speed limit value.

[0066] In the embodiment of the present application, the remaining power is determined by the available motor inverter, and then the train balance speed corresponding to different road slopes is obtained based on the unit basic running resistance and the unit slope additional resistance corresponding to different road slopes, and the corresponding train speed limit value is set, thereby performing speed limit protection on the train so that the speed of the target train is not higher than the train speed limit value.

[0067] It should be noted that based on the technical solution of the embodiment of the present application, the following contents are explained at the technical principle level:

[0068] First, the pulse blocking protection principle of the motor converter module:

[0069] The circuit structure of the motor converter module is shown in the attached figure of the specification. Figure 1 As shown, it mainly includes a three-phase bridge inverter, a DC (Direct Current) capacitor and an overvoltage chopper, which are supervised and controlled by the motor converter control unit. The computer control part of the motor converter module is directly powered by the battery through the converter device. The low-voltage power supply also provides a 24V DC power supply to the motor converter control unit and the measuring sensor.

[0070] The motor inverter module is also based on IGBT (Insulate-Gate Bipolar Transistor) power elements. The gate circuit drive unit turns on or off the IGBT according to the instructions of the motor inverter control unit. The gate circuit drive unit is powered by a low-voltage 24V power supply. The switching instructions of the motor inverter control unit are connected to the gate circuit drive unit through optical fiber transmission and photoelectric coupling to achieve electrical isolation of the high and low voltage systems. When the driver needs to manually cut off the motor inverter module or an internal fault occurs in the motor inverter module, the optical signal pulses of the gate circuit drive unit are blocked to quickly and automatically block and protect the motor inverter module.

[0071] Second, the principle of train surplus power calculation based on the number of available motor converter modules is as follows:

[0072] When the driver needs to manually cut off the motor inverter module or the motor inverter module automatically blocks protection, the traction system sends the motor inverter module available (start enable) signal to the train network control center, and the network control center calculates the number of motor inverter modules currently available.

[0073] Specifically, the corresponding table of the working status of the motor converter module is as shown in Table 1 below:

[0074]

[0075] Table 1

[0076] Third, the principle of calculating the automatic speed limit value based on different residual power is as follows:

[0077] The selection of automatic speed limit values ​​with different residual power is based on the power of the remaining motor converter modules and the balanced speeds with different slope resistances. The software speed limit value takes into account the ability to overcome a 5‰ slope resistance, and the selected value is equivalent to the balanced speed with a 5‰ slope resistance.

[0078] The train slope resistance is calculated according to the following formula:

[0079] (1) Basic unit operating resistance:

[0080] The basic unit running resistance of each type of EMU is w=a+bv+cv 2 Calculation, the coefficients of each order are taken as an example of CRH1A EMU: a=0.59, b=0.0011, c=0.000181

[0081] (2) Additional resistance per unit slope:

[0082] Unit slope additional resistance W i Equal to the slope of the ramp in thousandths i calculation: W i=i; when going uphill, i takes a positive value, and when going downhill, i takes a negative value.

[0083] Specifically, the traction force and resistance curves under different numbers of motor converter modules remaining in the reconnected CRH1A EMU are shown in the attached figure of the specification. Figure 2 shown.

[0084] Specifically, the speed limit setting table corresponding to the CRH1A type EMU is as shown in Table 2 below:

[0085]

[0086] Table 2

[0087] Fourth, the design principle of the control and protection logic module based on automatic speed limit of different residual power is as follows:

[0088] As shown in the attached figure of the specification Figure 3 and Figure 4 As shown, the maximum available number of motor converter modules of the train is calculated considering the two operating modes of reconnection and non-reconnection, and different speed limit values ​​are selected based on the different remaining numbers of motor converter modules (power) of the train. When the train is in operation control, the maximum speed of the train is automatically limited;

[0089] Among them, P1 is the total number of single-unit motor converter modules, and P2 is the total number of multi-unit motor converter modules.

[0090] The control and protection method of the above-mentioned EMU based on automatic speed limitation under different residual power can ensure that the train can accelerate to the maximum speed limit of the software when running on a 5‰ slope, and can also effectively prevent the problem of over-temperature alarm of system components caused by long-term operation.

[0091] It should be noted that the motor converter module in the principle description is referred to as the motor converter in the technical solution of the embodiment of the present application for simplicity of description.

[0092] Furthermore, Figure 2 There are multiple curves in the figure. The figure is intended to express the technical principle of obtaining the train balance speed through the intersection point. It is only used as an example and is mainly used to express the technical principle.

[0093] That is, how to draw the corresponding traction curve and resistance curve based on the available number of motor converters, the unit basic running resistance and the unit slope additional resistance corresponding to different slopes, obtain the intersection of the curves, and then obtain the train balance speed corresponding to different road slopes

[0094] Further, the monitoring of each motor converter of the target train and determining the number of motor converters in an available state, which is recorded as the available number of motor converters, includes the following steps:

[0095] Identifying the operating status of each of the motor converters of the target train;

[0096] When the working state of the motor converter is a charging state or a starting state, determining that the motor converter is in an available state;

[0097] The number of motor converters in an available state is counted and recorded as the available number of motor converters.

[0098] Furthermore, obtaining the train balance speed corresponding to different road slopes based on the available number of the motor converters comprises the following steps:

[0099] Based on the vehicle model of the target train, a unit running basic resistance is calculated;

[0100] Based on the road conditions with different slopes, the unit slope additional resistance corresponding to different road slopes is calculated;

[0101] Based on the available number of the motor converters, the unit basic running resistance and the unit slope additional resistance corresponding to different road slopes, the train balance speed corresponding to different road slopes is obtained.

[0102] Further, based on the available number of the motor converters, the unit running basic resistance and the unit slope additional resistance corresponding to different road slopes, obtaining the train balance speed corresponding to different road slopes includes the following steps:

[0103] Based on the available number of the motor inverters, the unit basic running resistance and the unit slope additional resistance corresponding to different slopes, the corresponding traction curve and resistance curve are drawn to obtain the intersection of the curves, and then the train balance speed corresponding to different road slopes is obtained.

[0104] Furthermore, the method is configured with a unit operation basic resistance calculation formula, the unit operation basic resistance calculation formula is:

[0105] w=a+bv+cv 2 ;in,

[0106] w is the unit basic running resistance, a is the first parameter corresponding to the model of the target train, b is the second parameter corresponding to the model of the target train, c is the third parameter corresponding to the model of the target train, and v is the speed of the target train.

[0107] Furthermore, the method is configured with a unit ramp additional resistance calculation formula, the unit ramp additional resistance calculation formula is:

[0108] W i =i; where

[0109] W i is the additional resistance per unit ramp, and i is the slope in thousandths corresponding to the road slope.

[0110] In summary, the technical solution of the embodiment of the present application has the following technical advantages:

[0111] First, the automatic speed limit function design can be applied to all high-speed railways, subways, light rails, urban express railways, trams and other rail vehicles in the field of rail transportation at home and abroad through the combination of train control software, traction system software and traction inverter hardware. It is an innovative application technology design of the automatic speed limit function of the EMU based on different residual power.

[0112] Second, based on the hardware design of the traction converter, the drive signal of the motor converter module of the traction converter is blocked, that is, its normal conduction is stopped, thereby quickly cutting off its working state. This method is used in the automatic speed limit control of rail vehicles in the field of rail transportation. When the driver needs to manually cut off the motor converter module or the motor converter module has an internal fault, the motor converter module can quickly and automatically block the protection.

[0113] Third, the basic resistance and slope resistance of the train are calculated based on the train traction calculation method, and the speed value of the EMU based on automatic speed limit of different residual power is selected by calculating the balance speed of the train's residual power and slope resistance.

[0114] Fourthly, based on the train control software and traction system software control logic, the traction system sends the available signal of the motor converter module to the train network control center, which calculates the number of currently available motor converter modules and selects the corresponding maximum train speed for automatic speed limit. This automatic speed limit function design can ensure that the train accelerates to the maximum speed limit of the software when running on a 5‰ slope, and effectively prevents the over-temperature alarm of system components caused by long-term operation.

[0115] It should be noted that in the technical solution of the embodiment of the present application, the train speed limit protection method based on different residual power has another execution process under the same technical idea, and the execution process includes the following steps:

[0116] A1. Calculate the train equilibrium speed corresponding to different road slopes under the running conditions corresponding to different available numbers of motor converters of the target train;

[0117] A2. Select a road slope, and set the train balance speed corresponding to the available number of each motor converter to the train speed limit value corresponding to the available number of each motor converter;

[0118] A3. Monitor each motor converter of the target train, determine the number of motor converters in an available state, and record the number as the available number of motor converters;

[0119] A4. Based on the train speed limit value corresponding to the available number of the motor converters, speed limit protection is performed on the target train so that the speed of the target train does not exceed the train speed limit value.

[0120] It should be noted that the technical core of the specific implementation is the same as steps S1 to S4, and the difference lies in:

[0121] The process of steps S1 to S4 is:

[0122] First monitor and obtain the available number of motor converters;

[0123] Then calculate the train equilibrium speed corresponding to different road slopes under the condition of the available number of motor converters;

[0124] Then, based on the selected road slope, the corresponding train balance speed is set as the train speed limit value;

[0125] Finally, speed limit protection is performed.

[0126] Steps A1 to A4 are:

[0127] First, all situations of the available number of motor converters are listed, from all available to all unavailable, and then the train equilibrium speed corresponding to different road slopes is calculated under each condition of the available number of motor converters;

[0128] Then, based on the selected road slope, the corresponding train balance speed is set as the train speed limit value, and the corresponding train speed limit value under the available number working condition of each motor converter is obtained;

[0129] Finally, the available number of motor converters is monitored and speed limit protection is performed based on the corresponding train speed limit value.

[0130] It can be seen that the core technology of the two is the same, the difference is that steps S1 to S4 are first monitoring, then calculation, then setting, and finally speed limit protection;

[0131] Steps A1 to A4 are calculation, setting, monitoring, and finally speed limit protection.

[0132] Second, see Figure 6 As shown, an embodiment of the present application provides a train speed limit protection device based on different residual power, the device comprising:

[0133] A motor converter monitoring module is used to monitor each motor converter of the target train, determine the number of motor converters in an available state, and record it as the available number of motor converters;

[0134] A train balance speed calculation module, which is used to obtain the train balance speed corresponding to different road slopes based on the available number of motor converters;

[0135] A train speed limit value calculation module, which is used to select a road slope and set the corresponding train balance speed as the train speed limit value;

[0136] A train speed limit protection module is used to perform speed limit protection on a target train based on the train speed limit value so that the speed of the target train does not exceed the train speed limit value.

[0137] In the embodiment of the present application, the remaining power is determined by the available motor inverter, and then the train balance speed corresponding to different road slopes is obtained based on the unit basic running resistance and the unit slope additional resistance corresponding to different road slopes, and the corresponding train speed limit value is set, thereby performing speed limit protection on the train so that the speed of the target train is not higher than the train speed limit value.

[0138] Furthermore, the motor converter monitoring module is also used to identify the working status of each motor converter of the target train;

[0139] The motor converter monitoring module is also used to determine that the motor converter is in an available state when the working state of the motor converter is a charging state or a starting state;

[0140] The motor converter monitoring module is also used to count the number of motor converters in an available state, which is recorded as the available number of motor converters.

[0141] Furthermore, the train balance speed calculation module is also used to calculate and obtain the unit running basic resistance based on the vehicle model of the target train;

[0142] The train balance speed calculation module is also used to calculate the unit slope additional resistance corresponding to different road slopes based on road conditions with different slopes;

[0143] The train balance speed calculation module is also used to obtain the train balance speed corresponding to different road slopes based on the available number of the motor inverters, the unit basic running resistance and the unit slope additional resistance corresponding to different road slopes.

[0144] Furthermore, the train balance speed calculation module is also used to draw the corresponding traction curve and resistance curve based on the available number of the motor inverters, the unit basic running resistance and the unit slope additional resistance corresponding to different slopes, obtain the intersection of the curves, and then obtain the train balance speed corresponding to different road slopes.

[0145] Furthermore, the device is provided with a unit operation basic resistance calculation formula, and the unit operation basic resistance calculation formula is:

[0146] w=a+bv+cv 2 ;in,

[0147] w is the unit basic running resistance, a is the first parameter corresponding to the model of the target train, b is the second parameter corresponding to the model of the target train, c is the third parameter corresponding to the model of the target train, and v is the speed of the target train.

[0148] Furthermore, the device is provided with a unit ramp additional resistance calculation formula, the unit ramp additional resistance calculation formula is:

[0149] W i =i; where

[0150] W i is the additional resistance per unit ramp, and i is the slope in thousandths corresponding to the road slope.

[0151] It should be noted that the train speed limit protection device based on different residual power mentioned in the second aspect of the embodiment of the present application is similar in technical principles to the train speed limit protection method based on different residual power mentioned in the first aspect in terms of technical background, technical problems, technical solutions and technical effects, and will not be elaborated here.

[0152] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0153] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0154] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A train speed limit protection method based on different residual power, characterized in that: The method comprises the following steps: Monitor each motor converter of the target train, determine the number of motor converters in an available state, and record the number as the available number of motor converters; Based on the available number of the motor converters, obtaining the train balance speed corresponding to different road slopes; Selecting a road slope, and setting the corresponding train balance speed as the train speed limit; Based on the train speed limit value, speed limit protection is performed on the target train so that the speed of the target train does not exceed the train speed limit value.

2. The train speed limit protection method based on different residual power according to claim 1 is characterized in that: The monitoring of each motor converter of the target train and determining the number of motor converters in an available state, which is recorded as the available number of motor converters, includes the following steps: Identifying the operating status of each of the motor converters of the target train; When the working state of the motor converter is a charging state or a starting state, determining that the motor converter is in an available state; The number of motor converters in an available state is counted and recorded as the available number of motor converters.

3. The train speed limit protection method based on different residual power according to claim 1 is characterized in that: The method of obtaining the train balance speed corresponding to different road slopes based on the available number of the motor converters comprises the following steps: Based on the vehicle model of the target train, a unit running basic resistance is calculated; Based on the road conditions with different slopes, the unit slope additional resistance corresponding to different road slopes is calculated; Based on the available number of the motor converters, the unit basic running resistance and the unit slope additional resistance corresponding to different road slopes, the train balance speed corresponding to different road slopes is obtained.

4. The train speed limit protection method based on different residual power as claimed in claim 3 is characterized in that: Based on the available number of the motor converters, the unit running basic resistance and the unit slope additional resistance corresponding to different road slopes, obtaining the train balance speed corresponding to different road slopes includes the following steps: Based on the available number of the motor inverters, the unit basic running resistance and the unit slope additional resistance corresponding to different slopes, the corresponding traction curve and resistance curve are drawn to obtain the intersection of the curves, and then the train balance speed corresponding to different road slopes is obtained.

5. The train speed limit protection method based on different residual power as claimed in claim 3 is characterized in that: The method is configured with a unit operation basic resistance calculation formula, the unit operation basic resistance calculation formula is: w=a+bv+cv 2 ;in, a is a first parameter corresponding to the vehicle type of the target train, b is a second parameter corresponding to the vehicle type of the target train, c is a third parameter corresponding to the vehicle type of the target train, and v is the speed of the target train.

6. The train speed limit protection method based on different residual power as claimed in claim 3 is characterized in that: The method is configured with a unit ramp additional resistance calculation formula, the unit ramp additional resistance calculation formula is: w i =i; where i is the slope in thousandths corresponding to the road slope.

7. A train speed limit protection device based on different residual power, characterized in that: The device comprises: A motor converter monitoring module is used to monitor each motor converter of the target train, determine the number of motor converters in an available state, and record it as the available number of motor converters; A train balance speed calculation module, which is used to obtain the train balance speed corresponding to different road slopes based on the available number of motor converters; A train speed limit value calculation module, which is used to select a road slope and set the corresponding train balance speed as the train speed limit value; A train speed limit protection module is used to perform speed limit protection on a target train based on the train speed limit value so that the speed of the target train does not exceed the train speed limit value.

8. The train speed limit protection device based on different residual power according to claim 7, characterized in that: The motor converter monitoring module is also used to identify the working status of each motor converter of the target train; The motor converter monitoring module is also used to determine that the motor converter is in an available state when the working state of the motor converter is a charging state or a starting state; The motor converter monitoring module is also used to count the number of motor converters in an available state, which is recorded as the available number of motor converters.

9. The train speed limit protection method based on different residual power according to claim 8, characterized in that: The train balance speed calculation module is also used to calculate and obtain the unit running basic resistance based on the vehicle model of the target train; The train balance speed calculation module is also used to calculate the unit slope additional resistance corresponding to different road slopes based on road conditions with different slopes; The train balance speed calculation module is also used to obtain the train balance speed corresponding to different road slopes based on the available number of the motor inverters, the unit basic running resistance and the unit slope additional resistance corresponding to different road slopes.

10. The train speed limit protection method based on different residual power according to claim 9, characterized in that: The train balance speed calculation module is also used to draw the corresponding traction curve and resistance curve based on the available number of the motor inverters, the unit basic running resistance and the unit slope additional resistance corresponding to different slopes, obtain the intersection of the curves, and then obtain the train balance speed corresponding to different road slopes.

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