CN110823589B - Reverse starting test method and device for traction system - Google Patents
Reverse starting test method and device for traction system Download PDFInfo
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- CN110823589B CN110823589B CN201810924444.2A CN201810924444A CN110823589B CN 110823589 B CN110823589 B CN 110823589B CN 201810924444 A CN201810924444 A CN 201810924444A CN 110823589 B CN110823589 B CN 110823589B
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Abstract
The invention discloses a reverse start test method and a reverse start test device for a traction system, wherein the method comprises the following steps: s1, connecting an accompanying traction system and a tested traction system to construct a reverse starting test system, wherein the accompanying traction system simulates the load of the tested traction system; s2, when a test is started, controlling the accompanying traction system to reversely start, and controlling the accompanying traction system to operate according to control parameters obtained by calculating the operation working condition of the required test; s3, when the accompanying and testing traction system runs to a specified running working condition, starting the tested traction system, giving a forward torque of the tested traction system, and controlling the reverse counter-traction between the tested traction system and the accompanying and testing traction system according to the torque direction of the accompanying and testing traction system so as to simulate a vehicle reverse starting working condition; and S4, monitoring the running states of the tested traction system and the accompanying traction system, and judging the test result. The invention has the advantages of simple test operation, low realization cost, high test reliability, good test performance and the like.
Description
Technical Field
The invention relates to the technical field of electric transmission vehicle tests, in particular to a traction system reverse starting test method and device suitable for an electric transmission vehicle.
Background
The reverse starting (starting) test is mainly used for checking the starting capability of a traction system in a vehicle backward sliding process in the field of electric transmission (including electric locomotives, motor train units, urban rail vehicles, mine trucks, electric coaches, electric cars and the like). At present, to verify the reverse starting performance of the traction system of a vehicle in the field of electric transmission, a test method is generally as follows: firstly, applying parking brake on a vehicle, namely after the vehicle stops, using a brake shoe to hold a wheel pair of the vehicle tightly in order to prevent the vehicle from moving artificially; parking the vehicle on a required slope, and then applying brake relief, namely before starting the vehicle, canceling the parking brake of the vehicle; and applying forward traction again, wherein the train can generate backward slipping due to the influence of the earth gravity when the traction force is not given to a required value in time due to the influence of the earth gravity after the braking is relieved, in the starting process of the train, the backward slipping traction motor of the traction system reverses backwards firstly and then gradually stops under the traction of the traction system, then the train runs forwards, if the train can be normally started on a slope and is dragged forwards, the test is passed, and if the train cannot be pulled forwards, the test is not passed. However, the above test method can only be carried out on a slope of an actual running line after the traction system is assembled in a vehicle, and cannot be verified in the joint debugging test process of the ground traction system, so that the test cost is high, the test operation is complex, and the test cannot be conveniently and timely adjusted when the test is passed.
In order to realize the reverse starting performance test simulation of a traction transmission system in an electric transmission vehicle, the IEC 61377 standard specifies that a reverse starting test is carried out on a test bench to simulate the starting function of a vehicle with a specific load on a route with a specific gradient, the tested traction system needs to be switched from reverse starting to forward starting under the full torque condition, but no effective scheme can meet the IEC 61377 standard at present, and the efficient and reliable reverse starting test is realized.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the technical problems in the prior art, the invention provides the reverse starting test method and the reverse starting test device for the traction system, which have the advantages of simple test operation, low implementation cost, high test reliability and good test performance.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a reverse starting test method of a traction system comprises the following steps:
s1, connecting an accompanying test traction system and a tested traction system to construct a reverse starting test system, wherein the accompanying test traction system simulates the load of the tested traction system;
s2, when a test is started, controlling the accompanying traction system to reversely start, and controlling the accompanying traction system to operate according to control parameters obtained by calculating the operation working condition of the required test;
s3, when the test-accompanying traction system runs to a specified running working condition, starting the tested traction system, giving a forward moment of the tested traction system, and controlling the tested traction system and the test-accompanying traction system to realize reverse counter-traction according to the moment direction of the test-accompanying traction system so as to simulate a vehicle reverse starting working condition;
and S4, monitoring the running states of the tested traction system and the accompanying traction system, and judging the test result according to the monitored running states.
As a further improvement of the process of the invention: the control parameters comprise reaction torque and the highest reverse rotation speed, the reaction torque and the highest reverse rotation speed are obtained through calculation according to vehicle parameters and line working condition parameters required by the test in the step S2, the test-accompanying traction system is operated in a constant torque mode according to the control of the reaction torque, and the highest rotation speed value in the operation process is controlled according to the highest reverse rotation speed.
As a further improvement of the process of the invention: and in the step S3, when the test-accompanying traction system runs to the required reverse rotation speed, starting the tested traction system, and giving the tested traction system the maximum forward starting torque so as to realize the reverse opposite dragging of the tested traction system and the test-accompanying traction system.
As a further improvement of the process of the invention: and step S4, detecting the forward and reverse rotation running states of the traction motors in the test-accompanying traction system and the tested traction system, and judging whether the test passes or not according to whether the tested traction system can drag the test-accompanying traction system from reverse rotation to forward rotation or not.
As a further improvement of the process of the invention: in the step S4, if it is monitored that the tested traction system can drag the accompanying traction system from reverse rotation to forward rotation within the maximum time of starting calculated in advance, it is determined that the test is successful, otherwise, it is determined that the test is unsuccessful.
As a further improvement of the process of the invention: the step S4 further includes adjusting the tested traction system and the test-assistant traction system to be forward opposite-towed when it is detected that the traction motor in the test-assistant traction system is converted from reverse rotation to forward rotation.
As a further improvement of the process of the invention: when the test is determined to be unsuccessful in step S4, the method further includes modifying the forward torque value given to the tested traction system, and re-testing until the test is passed.
As a further improvement of the process of the invention: the method further comprises the steps of monitoring the operation parameters of the tested traction system and/or the accompanying traction system in real time, and triggering protection actions when the operation parameters are monitored to reach preset threshold values.
As a further improvement of the process of the invention: the operating parameters include one or more of traction motor current, reaction torque, and rotational speed.
As a further improvement of the process of the invention: and when the running parameters of the accompanying traction system are monitored to reach a set threshold value, controlling to switch off the main power supply and stop the power supply.
As a further improvement of the process of the invention: in the step S1, the reverse rotation start test system is an alternating current transmission back-to-back test system, and the test-accompanying traction system and the tested traction system respectively include a voltage transformation module, a current transformation module and a traction motor which are sequentially connected.
As a further improvement of the process of the invention: when the tested traction system is configured to work under a traction working condition, the accompanying traction system is configured to work under a braking working condition, or when the tested traction system is configured to work under a braking working condition, the accompanying traction system is configured to work under a traction working condition.
A traction system reverse start test device, comprising:
the test system module is used for connecting an accompanying test traction system and a tested traction system to construct a reverse starting test system, wherein the accompanying test traction system simulates the load of the tested traction system;
the test accompanying system control module is used for controlling the test accompanying traction system to reversely start when a test is started, and controlling the test accompanying traction system to operate according to control parameters obtained by calculating the operation working condition of the required test;
the system control module is used for starting the traction system to be tested when the traction system to be tested runs to a specified running working condition, giving a forward moment of the traction system to be tested, and controlling the traction system to be tested and the traction system to be tested to realize reverse drag according to the moment direction of the traction system to be tested so as to simulate a vehicle reverse starting working condition;
and the monitoring and judging module is used for monitoring the running states of the tested traction system and obtaining a test result according to the monitored running states.
As a further improvement of the device of the invention: and the test accompanying system control module calculates to obtain reaction torque and the highest reversal rotating speed according to vehicle parameters and line working condition parameters required by the test, controls the test accompanying traction system to operate in a constant torque mode according to the reaction torque, and controls the highest rotating speed value in the operation process according to the highest reversal rotating speed.
As a further improvement of the device of the invention: and when the trial-accompanying traction system runs to the pre-calculated reverse rotation highest rotating speed in the trial-accompanying system control module, starting the trial-accompanying traction system, and giving the trial-accompanying traction system a forward starting maximum torque so as to realize reverse opposite dragging of the trial-accompanying traction system and the trial-accompanying traction system.
As a further improvement of the device of the invention: the monitoring and judging module comprises a monitoring unit and a judging unit, the monitoring unit monitors the forward and reverse rotation running state of the tested traction system, and judges whether the test passes or not according to the fact that whether the tested traction system can drag the accompanying traction system from reverse rotation to forward rotation or not.
As a further improvement of the device of the invention: if the judging unit monitors that the tested traction system can drag the accompanied traction system from reverse rotation to forward rotation within the maximum starting time obtained by pre-calculation, the test is judged to be successful, and otherwise, the test is judged to be unsuccessful.
As a further improvement of the device of the invention: the monitoring and judging module further comprises a first adjusting unit, and the first adjusting unit is used for adjusting the tested traction system and the accompanying traction system to be forward oppositely dragged when the fact that the traction motor in the accompanying traction system is converted from reverse rotation to forward rotation is detected.
As a further improvement of the device of the invention: the monitoring and judging module further comprises a second adjusting unit which is used for modifying the forward torque value given to the tested traction system and returning to the monitoring unit to carry out the test again when the test is judged to be unsuccessful.
As a further improvement of the device of the invention: the protection device also comprises a protection module which is used for monitoring the operation parameters of the tested traction system and/or the accompanying traction system in real time and triggering protection actions when the operation parameters are monitored to reach the preset threshold value.
As a further improvement of the device of the invention: the reversal starting test system is an alternating current transmission back-to-back test system, the accompanying and testing traction system and the tested traction system respectively comprise a transformation module, a current transformation module and a traction motor which are sequentially connected, and the transformation module adopts a traction transformer or an energy storage device.
As a further improvement of the device of the invention: the test system module also comprises a torque and rotating speed detection unit which is respectively connected with the accompanying traction system and the tested traction system and is used for detecting the rotating speed and the torque of the traction motor.
Compared with the prior art, the invention has the advantages that:
1) according to the reverse starting test method of the traction system, the auxiliary traction system simulates the load of the tested traction system, the tested traction system is started and a forward torque is given after the auxiliary traction system is controlled to reversely run to a specified running working condition, the traction system and the auxiliary traction system realize mutual dragging, the process of sliding after the vehicle is started can be simulated, the reverse starting test of the traction transmission system of the vehicle is realized, the test of the reverse starting of the traction transmission system can be carried out on a ground test stand, the reverse starting performance of the traction transmission system can be debugged and tested before the traction transmission system is not assembled, the test resources can be saved, and the performance of the traction system before leaving a factory can be ensured.
2) The reverse starting test method of the traction system can realize reverse drag of the trial-and-error traction system and the tested traction system based on the alternating current transmission back-to-back test system by detecting the torque direction of the traction motor, and simultaneously controls the traction motor to operate by setting the torque reaction, and can unload force to protect the coupler when the torque is overlarge, thereby accurately and reliably simulating the actual reverse starting working condition of the whole vehicle, and flexibly controlling the backward sliding speed and the inertia torque in the backward sliding process on a ground test platform.
3) According to the reverse rotation starting test method of the traction system, when the condition that the traction motor in the test-accompanying traction system is converted from reverse rotation to forward rotation is detected, the tested traction system and the test-accompanying traction system are adjusted to be in forward butt-dragging, and the forward butt-dragging and reverse butt-dragging seamless switching of the test-accompanying traction system and the tested traction system can be achieved.
4) The reverse starting test method of the traction system further monitors the operation parameters of the traction system to be tested and the accompanying traction system in real time, triggers the protection action when the monitored operation parameters reach the preset threshold value, can trigger the protection action when the test fails, ensures that the accompanying system components cannot exceed the maximum load and be damaged, and ensures the safety of the test.
Drawings
Fig. 1 is a schematic flow chart of an implementation of a reverse start test method of a traction system in embodiment 1 of the present invention.
FIG. 2 is a schematic structural view of a test system used in example 1 of the present invention.
Fig. 3 is a schematic structural diagram of a reverse rotation starting test device of a traction system in embodiment 1 of the present invention.
Fig. 4 is a schematic flow chart illustrating an implementation of a reverse start test of the traction system in embodiment 2 of the present invention.
Detailed Description
The invention is further described below with reference to the drawings and specific preferred embodiments of the description, without thereby limiting the scope of protection of the invention.
Example 1:
as shown in fig. 1, the reverse rotation starting test method of the traction system of the embodiment includes the following steps:
s1, connecting the accompanying test traction system with the tested traction system to construct a reverse starting test system, wherein the accompanying test traction system simulates the load of the tested traction system;
s2, when a test is started, controlling the accompanying traction system to reversely start, and controlling the accompanying traction system to operate according to control parameters obtained by calculating the operation working condition of the required test;
s3, when the accompanying traction system runs to a specified running working condition, starting the tested traction system, giving a forward torque of the tested traction system, and controlling the traction system and the accompanying traction system to realize reverse opposite dragging according to the torque direction of the accompanying traction system so as to simulate a vehicle reverse starting working condition;
and S4, monitoring the running states of the accompanying traction system and the tested traction system, and obtaining a test result according to the monitored running states.
In the test method of the embodiment, the test-assistant traction system simulates the load of the tested traction system, the tested traction system is started and given forward torque after the test-assistant traction system is controlled to reversely run to a specified running working condition, the traction system and the test-assistant traction system can be controlled to realize reverse counter-traction according to the torque direction, namely the forward and reverse rotating directions, of the test-assistant traction system, the slipping process after the vehicle is started can be simulated, the reverse starting test of the vehicle traction transmission system is realized, meanwhile, the test of the reverse starting of the traction transmission system can be carried out on a ground test stand without being executed on an actual ramp after the traction system is loaded, the reverse starting performance of the traction transmission system can be debugged and tested before the traction transmission system is not assembled to a whole vehicle (a whole vehicle), the traction system can be conveniently adjusted in time according to the test result, so that the test resources are saved, the performance of the traction system before leaving the factory can be ensured.
As shown in fig. 2, the reverse rotation start test system of this embodiment specifically adopts an alternating current transmission back-to-back test system, which includes a trial-accompanying traction system and a trial-under traction system, the trial-accompanying traction system and the trial-under traction system are connected by a coupling to realize the transmission of mechanical energy, the trial-accompanying traction system and the trial-under traction system include a voltage transformation module, a current transformation module and a traction motor, which are connected in sequence, to form a back-to-back structure, and the voltage transformation module adopts a traction transformer or an energy storage device. In the test process, the auxiliary test traction system simulates the load of the tested traction system, when the tested traction system is configured to work under the traction working condition, the auxiliary test traction system is configured to work under the braking working condition, or when the tested traction system is configured to work under the braking working condition, the auxiliary test traction system is configured to work under the traction working condition. Based on the alternating current transmission back-to-back test system, the reverse starting simulation of the traction system can be conveniently realized.
The testing system further comprises a torque and rotation speed sensor for detecting the rotation speed and the torque of the traction motor, wherein the torque and rotation speed sensor is specifically arranged on a coupling between the accompanying system and the tested system; the device also comprises a speed signal detection circuit for detecting speed signals of the traction motor in the test accompanying system and the tested system, and the rotating speed and the positive and negative rotation states of the motor are judged by detecting the speed signals of the traction motor.
In this embodiment, the control parameters include a reaction torque and a highest reverse rotation speed, the reaction torque and the highest reverse rotation speed are calculated in step S2 according to vehicle parameters and line working condition parameters required by the test, the test-accompanying traction system is controlled to operate in a constant torque mode according to the reaction torque, namely, the output torque is constant, so as to simulate an inertia torque in the process of backward sliding of the vehicle, and the highest rotation speed value in the process of operating is controlled according to the highest reverse rotation speed, namely, the highest backward sliding rotation speed of the vehicle is simulated, so that the test-accompanying traction system is ensured not to lose control. Specifically, the reaction torque is calculated in advance according to parameters such as the whole vehicle load of an actual vehicle and line working condition parameters such as a line ramp, the calculated reaction torque controls the reverse starting operation of the test-assisting traction system, so that the inertia torque in the backward slipping process of the vehicle is simulated, the required backward slipping rotation speed and the inertia torque in the backward slipping process can be flexibly controlled on a ground test platform through control parameter adjustment, and flexible tests of various tests are realized. The vehicle parameters comprise vehicle load and the like, the line working condition parameters comprise track gradient, track adhesion force and the like, so that the vehicle backward sliding working condition can be accurately simulated on a ground test platform according to the requirements of the line working condition and the vehicle technical condition, and the vehicle parameters and the line working condition parameters can be selected according to actual requirements except for the vehicle load and the line ramp, so that the actual vehicle state and the line working condition can be better simulated.
The control parameters of the embodiment also comprise a starting maximum time so as to control the maximum time of the test-accompanying traction system in the process of reverse running, namely the test maximum time. The maximum starting time can be calculated according to the technical conditions of the whole vehicle and the working conditions of the actual line, the technical conditions of the whole vehicle comprise the load of the vehicle and the like, and the working conditions of the actual line comprise the gradient of the rail, the adhesion force of the rail and the like. The method specifically comprises the steps of calculating reaction torque in advance according to the load of the whole vehicle and a line ramp, calculating the maximum reversal rotating speed and the maximum starting time according to the technical conditions of the whole vehicle, setting a test-accompanying traction system to be in a reversal starting mode after the test-accompanying traction system is started, inputting the reaction torque, the maximum reversal rotating speed and the maximum starting time as control parameters into the test-accompanying traction system, controlling the torque, the maximum rotating speed and the starting time in the reversal running process of the test-accompanying traction system, controlling the test-accompanying traction system to run in the constant torque mode according to the reaction torque, enabling the test-accompanying traction system to enter a reverse idling state, and limiting the maximum rotating speed value in the running process according to the maximum reversal rotating speed.
The maximum reverse rotation speed, the motor reverse torque and the maximum starting time can be obtained through automatic calculation of simulation software according to line conditions and technical conditions of the whole vehicle.
Only can realize accompanying trial traction system and being tried traction system in the traditional alternating current transmission test system and drag in the same direction, can cause the too big and damage of shaft coupling atress when reverse drag, this embodiment is through detecting traction motor's moment direction, make can realize accompanying trial traction system and being tried traction system and drag reversely based on alternating current transmission back-to-back test system, control traction motor operation through setting for reaction torque simultaneously, can unload power protection shaft coupling when moment is too big, thereby can be accurate, reliable simulation actual whole car reversal start-up operating mode.
It will be appreciated that in addition to the torque reaction, maximum reverse speed, and maximum start-up time described above, other control parameters may be added or used to control the reverse operation of the trail-assist traction system depending on the actual requirements.
In this embodiment, in step S3, when the trial traction system runs to the required reverse rotation speed, the trial traction system is started, and the maximum torque is set for forward start of the trial traction system, so that the trial traction system and the trial traction system are reversely dragged, thereby accurately simulating the reverse rotation start process of the traction system.
In the process that the tested traction system and the accompanying traction system are reversely dragged, the motor of the accompanying traction system firstly rotates reversely and then rotates forwards, and if the tested traction system can convert the accompanying traction system from reverse rotation to forward rotation, the fact that the traction system has a reverse rotation starting function is indicated. In this embodiment, in step S4, the forward and reverse rotation operating states, that is, the torque directions, of the traction motors in the test-assisting traction system and the tested traction system are detected, specifically, the forward and reverse rotation states of the tested traction system and the test-assisting traction system are determined by collecting the speed signal of the traction motor, and whether the test passes or not is determined according to whether the tested traction system can drag the test-assisting traction system from reverse rotation to forward rotation.
In this embodiment, the step S4 further includes adjusting the tested traction system and the tested traction system to be forward aligned when it is detected that the traction motor in the tested traction system is converted from reverse rotation to forward rotation, so as to implement seamless switching between forward aligned dragging and reverse aligned dragging of the tested traction system and the tested traction system. The embodiment specifically collects speed signals of traction motors in an accompanying and testing traction system and a tested traction system respectively, judges phase differences of an A line and a B line of the traction motors in the accompanying and testing traction system and the tested traction system respectively corresponding to the speed signals to judge the forward rotation state and the reverse rotation state of the motors, changes a control strategy in real time after detecting the forward rotation and the reverse rotation state, and changes from reverse counter-dragging to forward counter-dragging, thereby realizing seamless switching of the forward counter-dragging and the reverse counter-dragging.
In step S4 of this embodiment, it is specifically determined that the test is successful if it is monitored that the tested traction system can drag the accompanying traction system from the reverse rotation to the forward rotation within the maximum starting time obtained in advance through calculation, otherwise, it is determined that the test is unsuccessful, that is, the tested traction system drags the accompanying traction system from the reverse rotation to the forward rotation to determine whether the time meets the requirement, and the maximum starting time is obtained in advance through calculation according to the required technical condition requirements. Of course, other parameters may be added or adopted to evaluate whether the inversion test passes or evaluate the test performance according to the actual requirement.
In step S4, when it is determined that the test is unsuccessful, the method further includes modifying the forward torque value given to the tested traction system, and performing the test again until the test is passed, so that the required forward torque of the traction system can be finally determined through the test process.
The embodiment also comprises the operation parameters of the traction system to be tested and the accompanying traction system which are monitored in real time, when the monitored operation parameters reach the preset threshold value, the protection action is triggered, so that the system triggers the protection action when the test fails, the test safety is ensured, wherein the operation parameters comprise the current of the traction motor, the reaction torque, the rotating speed and the like, the motor torque and the rotating speed protection threshold value are preset, the components of the accompanying traction system are ensured not to be damaged by exceeding the maximum load of the components by monitoring the motor torque and the rotating speed, specifically, any one of the parameters or the combination of more than two parameters can be selectively monitored according to actual requirements, and other operation parameters can be added to further improve the monitoring performance.
In this embodiment, when it is monitored that the operating parameters of the accompanying traction system reach the set threshold, the main power supply is controlled to be switched off and stopped.
According to the method, the tested traction system controls the reverse drag of the accompanying traction system to be converted into the forward drag, the reverse start process of the vehicle traction system can be accurately simulated, the reverse start test of the traction system can be verified on a ground test bed, the test on an actual ramp after the traction system is loaded is not needed, the test cost is low, the test operation is simple, the test process can be flexibly controlled, and the operation of the accompanying traction system in the test process is irrelevant to the control strategy adopted by the tested traction system in the actual line operation.
As shown in fig. 3, the reverse rotation start test device of the traction system of the present embodiment includes:
the test system module is used for connecting the accompanying test traction system and the tested traction system to construct a reverse starting test system, wherein the accompanying test traction system simulates the load of the tested traction system;
the test accompanying system control module is used for controlling the test accompanying traction system to reversely start when a test is started, and controlling the test accompanying traction system to operate according to control parameters obtained by calculating the operation working condition of the required test;
the system control module is used for starting the tested traction system when the test-accompanying traction system runs to a specified running working condition, giving a forward moment of the tested traction system, and controlling the reverse counter-traction between the tested traction system and the test-accompanying traction system according to the moment direction of the test-accompanying traction system so as to simulate a vehicle reverse starting working condition;
and the monitoring and judging module is used for monitoring the tested traction system and the running state of the tested traction system and obtaining a test result according to the monitored running state.
In this embodiment, the reverse rotation start test system is an ac transmission back-to-back test system, as shown in fig. 2, the trial-accompanying traction system and the trial traction system each include a voltage transformation module, a current transformation module and a traction motor, which are connected in sequence, and the voltage transformation module is a traction transformer or an energy storage device.
In this embodiment, the test system module further includes a torque and rotation speed detection unit connected to the accompanying traction system and the tested traction system, respectively, and configured to detect a rotation speed and a torque of the traction motor.
In this embodiment, the trial-accompanying system control module calculates the reaction torque and the maximum reverse rotation speed according to vehicle parameters and line working condition parameters required by the test, and controls the trial-accompanying traction system to operate in a constant torque mode according to the reaction torque, that is, the output torque is constant, so as to simulate the inertia torque in the process of backward sliding of the vehicle, and controls the maximum rotation speed value in the operation process according to the maximum reverse rotation speed, that is, simulate the maximum backward sliding speed of the vehicle, so that the trial-accompanying traction system can be ensured not to run away and be out of control.
In this embodiment, when the trial-and-error traction system runs to the required reverse rotation speed in the trial-and-error system control module, the trial-and-error traction system is started, and the maximum torque is started in the forward direction of the trial-and-error traction system, so that the trial-and-error traction system and the trial-and-error traction system are reversely dragged.
In this embodiment, the monitoring and judging module includes a monitoring unit and a judging unit, and the monitoring unit monitors the forward and reverse rotation running state of the tested traction system, and judges whether the test passes or not according to whether the tested traction system can drag the accompanying traction system from reverse rotation to forward rotation.
In this embodiment, if the judging unit monitors that the tested traction system can drag the accompanying traction system from the reverse rotation to the forward rotation within the maximum starting time obtained by the pre-calculation, it is determined that the test is successful, otherwise, it is determined that the test is unsuccessful.
In this embodiment, the monitoring and determining module further includes a first adjusting unit, which is configured to adjust the tested traction system and the accompanying traction system to be forward coupled when it is detected that the traction motor in the accompanying traction system is converted from reverse rotation to forward rotation.
In this embodiment, the monitoring and determining module further includes a second adjusting unit, configured to modify the forward torque value given to the tested traction system when it is determined that the test is unsuccessful, and return to the execution monitoring unit to perform the test again.
In this embodiment, the protection device further includes a protection module, configured to monitor an operation parameter of the traction system under test and/or the traction system under test in real time, and trigger a protection action when the monitored operation parameter reaches a preset threshold.
The principle of the reverse rotation starting test device of the traction system in this embodiment is consistent with that of the reverse rotation starting test method of the traction system, and details are not repeated here.
Example 2:
as shown in fig. 4, the procedure for implementing the reverse starting test by applying the method of embodiment 1 in this embodiment is as follows:
firstly, starting a trial traction system, calculating reaction torque by simulation software of a trial traction system control computer according to the load of the whole vehicle and a line ramp, and calculating the highest rotation speed of reversal and the longest starting time according to technical condition requirements;
inputting the conditions of the reaction torque and the highest rotating speed into an accompanying and testing traction system, and operating the accompanying and testing traction system in a constant torque mode, wherein the accompanying and testing system is in a reverse idling state;
running the test assisting system to a required reverse rotation speed, and setting a torque, a rotating speed and a threshold value of the torque and the rotating speed in the mode so as to ensure the running safety of the test assisting system; opening a test bed test system to monitor the current and the rotating speed of the motor;
starting the tested traction system, giving the tested traction system a forward starting maximum moment, and realizing reverse opposite dragging of the test traction system and the tested traction system;
the test system detects that the torque or the rotating speed exceeds a threshold value according to preset counter torque and a rotating speed threshold value, the test system controls to trip the main power-off and stop power supply, and the test system returns to the step I to ensure that the system can generate protection action under the condition of test failure;
if the tested traction system can drag the auxiliary test traction system to rotate forwards on the basis of the reverse rotation of the auxiliary test traction system within the longest starting time required by the test, the test is successful, otherwise, the program of the tested traction system is modified, and the step (iv) is returned to the step (iv) to restart the test until the test is passed.
The foregoing is considered as illustrative of the preferred embodiments of the invention and is not to be construed as limiting the invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (16)
1. A reverse start test method of a traction system is characterized by comprising the following steps:
s1, connecting an accompanying test traction system and a tested traction system to construct a reverse starting test system, wherein the accompanying test traction system simulates the load of the tested traction system;
s2, when a test is started, controlling the accompanying traction system to reversely start, and controlling the accompanying traction system to operate according to control parameters obtained by calculating the operation working condition of the required test;
s3, when the accompanying and testing traction system runs to a specified running working condition, starting the tested traction system, giving a forward torque of the tested traction system, detecting the torque direction of a traction motor, and controlling the tested traction system and the accompanying and testing traction system to realize reverse counter-dragging according to the torque direction of the accompanying and testing traction system so as to simulate a vehicle reverse starting working condition;
s4, monitoring the running states of the tested traction system and the accompanying traction system, and judging the test result according to the monitored running states;
the control parameters comprise reaction torque and reversal highest rotating speed, the reaction torque and the reversal highest rotating speed are obtained through calculation according to vehicle parameters and line working condition parameters required by a test in the step S2, the test-accompanying traction system is operated in a constant torque mode according to the control of the reaction torque, and the highest rotating speed value in the operation process is controlled according to the reversal highest rotating speed;
in the step S3, when the trial-and-error traction system runs to the required reverse rotation speed, starting the trial traction system, and giving a maximum forward starting torque to the trial traction system, so as to realize reverse opposite dragging between the trial traction system and the trial-and-error traction system;
the step S4 further includes adjusting the tested traction system and the test-assistant traction system to be forward opposite-towed when it is detected that the traction motor in the test-assistant traction system is converted from reverse rotation to forward rotation.
2. The traction system reversal initiation test method of claim 1, wherein: and step S4, detecting the forward and reverse rotation running states of the traction motors in the test-accompanying traction system and the tested traction system, and judging whether the test passes or not according to whether the tested traction system can drag the test-accompanying traction system from reverse rotation to forward rotation or not.
3. The traction system reversal initiation test method of claim 2, wherein: in the step S4, if it is monitored that the tested traction system can drag the accompanying traction system from reverse rotation to forward rotation within the maximum time of starting calculated in advance, it is determined that the test is successful, otherwise, it is determined that the test is unsuccessful.
4. The traction system reversal initiation test method of claim 2 or 3, characterized in that: when the test is determined to be unsuccessful in step S4, the method further includes modifying the forward torque value given to the tested traction system, and re-testing until the test is passed.
5. The traction system reverse starting test method according to any one of claims 1 to 3, characterized in that: the method further comprises the steps of monitoring the operation parameters of the tested traction system and/or the accompanying traction system in real time, and triggering protection actions when the operation parameters are monitored to reach preset threshold values.
6. The traction system reversal initiation test method of claim 5, wherein: the operating parameters include one or more of traction motor current, reaction torque, and rotational speed.
7. The traction system reversal initiation test method of claim 6, wherein: and when the running parameters of the accompanying traction system are monitored to reach a set threshold value, controlling to switch off the main power supply and stop the power supply.
8. The traction system reverse starting test method according to any one of claims 1 to 3, characterized in that: in the step S1, the reverse rotation start test system is an alternating current transmission back-to-back test system, and the test-accompanying traction system and the tested traction system respectively include a voltage transformation module, a current transformation module and a traction motor which are sequentially connected.
9. The traction system reversal initiation test method of claim 8, wherein: when the tested traction system is configured to work under a traction working condition, the accompanying traction system is configured to work under a braking working condition, or when the tested traction system is configured to work under a braking working condition, the accompanying traction system is configured to work under a traction working condition.
10. A traction system reverse rotation start test device is characterized by comprising:
the test system module is used for connecting an accompanying test traction system and a tested traction system to construct a reverse starting test system, wherein the accompanying test traction system simulates the load of the tested traction system;
the test accompanying system control module is used for controlling the test accompanying traction system to reversely start when a test is started, and controlling the test accompanying traction system to operate according to control parameters obtained by calculating the operation working condition of the required test;
the system control module is used for starting the traction system to be tested when the traction system to be tested runs to a specified running working condition, giving a forward torque of the traction system to be tested, detecting the torque direction of a traction motor, and controlling the traction system to be tested and the traction system to be tested to realize reverse drag according to the torque direction of the traction system to be tested so as to simulate a vehicle reverse starting working condition;
the monitoring and judging module is used for monitoring the running states of the tested traction system and obtaining a test result according to the monitored running states;
calculating to obtain reaction torque and the highest reverse rotation speed according to vehicle parameters and line working condition parameters required by a test in the test accompanying system control module, controlling the test accompanying traction system to operate in a constant torque mode according to the reaction torque, and controlling the highest rotation speed value in the operation process according to the highest reverse rotation speed;
when the trial-accompanying traction system runs to the pre-calculated reverse rotation highest rotating speed in the trial-accompanying system control module, starting the trial-accompanying traction system, and giving the trial-accompanying traction system a forward starting maximum torque to realize reverse opposite dragging of the trial-accompanying traction system and the trial-accompanying traction system;
the monitoring and judging module further comprises a first adjusting unit, and the first adjusting unit is used for adjusting the tested traction system and the accompanying traction system to be forward oppositely dragged when the fact that the traction motor in the accompanying traction system is converted from reverse rotation to forward rotation is detected.
11. The traction system reversal initiation test apparatus of claim 10, wherein: the monitoring and judging module comprises a monitoring unit and a judging unit, the monitoring unit monitors the forward and reverse rotation running state of the tested traction system, and judges whether the test passes or not according to the fact that whether the tested traction system can drag the accompanying traction system from reverse rotation to forward rotation or not.
12. The traction system reversal initiation test apparatus of claim 11, wherein: if the judging unit monitors that the tested traction system can drag the accompanied traction system from reverse rotation to forward rotation within the maximum starting time obtained by pre-calculation, the test is judged to be successful, and otherwise, the test is judged to be unsuccessful.
13. The traction system reversal initiation test apparatus of claim 11, wherein the monitoring and determination module further includes a second adjustment unit configured to modify a forward torque value given to the traction system under test when it is determined that the test is unsuccessful, and return to the execution of the monitoring unit for a new test.
14. The traction system reverse rotation start test device according to any one of claims 10 to 13, wherein: the protection device also comprises a protection module which is used for monitoring the operation parameters of the tested traction system and/or the accompanying traction system in real time and triggering protection actions when the operation parameters are monitored to reach the preset threshold value.
15. The traction system reverse rotation start test device according to any one of claims 10 to 13, wherein: the reversal starting test system is an alternating current transmission back-to-back test system, the accompanying and testing traction system and the tested traction system respectively comprise a transformation module, a current transformation module and a traction motor which are sequentially connected, and the transformation module adopts a traction transformer or an energy storage device.
16. The traction system reverse rotation start test device according to any one of claims 10 to 13, wherein: the test system module also comprises a torque and rotating speed detection unit which is respectively connected with the accompanying traction system and the tested traction system and is used for detecting the rotating speed and the torque of the traction motor.
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| CN111735605B (en) * | 2020-08-05 | 2021-09-28 | 中南大学 | High-speed train dynamic model test system |
| CN113138613A (en) * | 2021-04-13 | 2021-07-20 | 合肥巨一动力***有限公司 | Method for reducing over-regulation of rotating speed of twin-dragging system |
| CN114371689A (en) * | 2022-01-05 | 2022-04-19 | 中国铁道科学研究院集团有限公司 | Vehicle control strategy test system and method |
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