CN117728351A - Control method and system for under-voltage protection, electronic equipment and storage medium - Google Patents
Control method and system for under-voltage protection, electronic equipment and storage medium Download PDFInfo
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Abstract
The invention discloses a control method, a system, electronic equipment and a storage medium for undervoltage protection, which relate to the field of electrical protection, determine whether a first undervoltage relay and a second undervoltage relay have faults or not through the contact action condition of two undervoltage relays and corresponding voltage setting values of the two undervoltage relays, further judge whether the control storage battery has the undervoltage condition or not through acquiring the current voltage of the control storage battery when the two undervoltage relays have faults, quickly and accurately judge whether the control storage battery of an electric locomotive has the undervoltage or not, accurately diagnose whether the two undervoltage relays have the faults or not, avoid the error protection of the locomotive caused by the faults of the undervoltage relays, further improve the accuracy and the reliability of the judgment process for controlling the storage battery, and ensure the normal operation of the electric locomotive without modifying the control circuit or the control system of the electric locomotive and improve the reliability of the whole vehicle.
Description
Technical Field
The present invention relates to the field of electrical protection, and in particular, to a control method, a system, an electronic device, and a storage medium for under-voltage protection.
Background
With the continuous development of the technology of vehicles such as electric locomotives, the requirements of users on the safety and reliability of the vehicles are also higher, and the control storage battery mainly provides a control power supply for the vehicles such as electric locomotives, so that the control system of the vehicles and the normal operation of internal relays, contactors and other components are driven. If the voltage of the control storage battery is lower than a certain value and under-voltage occurs, the control power supply cannot be normally provided, and then the control system, the relay, the contactor and other parts of the electric locomotive cannot work normally, so that the electric locomotive cannot operate normally. Therefore, how to effectively realize the undervoltage detection of the control storage battery is a technical problem to be solved.
In the prior art, the under-voltage relay is directly utilized to perform under-voltage protection on the control storage battery, but the under-voltage relay may have problems of precision reduction, poor contact and the like in the use process, so that the under-voltage relay is caused to perform false actions, namely, the under-voltage protection is not performed on the control storage battery, or the under-voltage protection is triggered by mistake, and the like, which result in serious influence on the normal operation of a locomotive.
Disclosure of Invention
The invention aims to provide a control method, a system, electronic equipment and a storage medium for under-voltage protection, which can rapidly and accurately judge whether a control storage battery of an electric locomotive is under-voltage or not, can accurately diagnose whether two under-voltage relays are out of order, avoid error protection of the locomotive caused by the failure of the under-voltage relays, further improve the accuracy and reliability of the judgment process for whether the control storage battery is under-voltage or not, are simple and easy to operate, do not need to modify a control circuit or a control system of the electric locomotive, ensure the normal operation of the electric locomotive, and improve the reliability of the whole vehicle.
In order to solve the technical problems, the invention provides a control method of under-voltage protection, which is applied to a controller of an under-voltage protection device, wherein the under-voltage protection device further comprises a first under-voltage relay and a second under-voltage relay, the coils of the first under-voltage relay and the coils of the second under-voltage relay are connected in parallel at two ends of a control storage battery, and one end of a contact of the first under-voltage relay and one end of a contact of the second under-voltage relay are connected with an input end of the controller; the control method comprises the following steps:
Determining the contact action condition of the first under-voltage relay and the contact action condition of the second under-voltage relay, wherein a first voltage setting value corresponding to the first under-voltage relay is different from a second voltage setting value corresponding to the second under-voltage relay;
judging whether the first under-voltage relay or the second under-voltage relay has faults or not based on the first voltage setting value, the second voltage setting value, the contact action condition of the first under-voltage relay and the contact action condition of the second under-voltage relay;
if yes, the current voltage of the control storage battery is obtained, and whether the control storage battery has an under-voltage condition and the fault conditions of the first under-voltage relay and the second under-voltage relay are determined based on the current voltage of the control storage battery.
Optionally, when the first voltage setting value corresponding to the first under-voltage relay is greater than the second voltage setting value corresponding to the second under-voltage relay, the determining whether the first under-voltage relay or the second under-voltage relay has a fault based on the first voltage setting value, the second voltage setting value, the contact action condition of the first under-voltage relay and the contact action condition of the second under-voltage relay includes:
When the contact of the first under-voltage relay does not act and the contact of the second under-voltage relay acts, judging that the first under-voltage relay or the second under-voltage relay has faults;
when the contact of the first undervoltage relay and the contact of the second undervoltage relay do not act, judging that the first undervoltage relay or the second undervoltage relay has no fault, and the control storage battery has no undervoltage condition;
when the contact of the first undervoltage relay acts and the contact of the second undervoltage relay does not act, judging that the first undervoltage relay or the second undervoltage relay has no fault, and the control storage battery has no undervoltage condition but has undervoltage risk;
when the contact of the first undervoltage relay and the contact of the second undervoltage relay act, the first undervoltage relay or the second undervoltage relay has no fault, and the undervoltage condition of the control storage battery is judged.
Optionally, when the first voltage setting value corresponding to the first under-voltage relay is greater than the second voltage setting value corresponding to the second under-voltage relay, the determining, based on the current voltage of the control battery, whether the control battery has an under-voltage condition and a fault condition of the first under-voltage relay and the second under-voltage relay includes:
Judging whether the current voltage of the control storage battery is smaller than a preset voltage value, wherein the preset voltage value is larger than a second voltage setting value corresponding to the second under-voltage relay and smaller than a first voltage setting value corresponding to the first under-voltage relay;
if yes, judging that the control storage battery has an under-voltage condition, and the first under-voltage relay has a fault;
if not, judging that the control storage battery has no under-voltage condition, and the second under-voltage relay has faults.
Optionally, the under-voltage protection device further includes a prompt module, and the control method further includes:
when any one or more of the under-voltage condition of the control storage battery, the failure of the first under-voltage relay and the failure of the second under-voltage relay exist, the prompt module is controlled to execute a corresponding prompt strategy.
Optionally, the fixed end of the contact of the first under-voltage relay is connected with a power supply, the first switching end is connected with the input end of the controller, the second switching end is suspended, the fixed end of the contact of the second under-voltage relay is connected with the power supply, the first switching end is connected with the input end of the controller, the second switching end is suspended, the contact action condition of the first under-voltage relay and the contact action condition of the second under-voltage relay are determined, and the method comprises the following steps:
Determining the contact action condition of the first under-voltage relay based on the difference of level signals before and after contact switching of the first under-voltage relay;
and determining the contact action condition of the second under-voltage relay based on the difference of the level signals before and after contact switching of the second under-voltage relay.
Optionally, the under-voltage protection device further includes a control battery detection system, an input end of the control battery detection system is connected with an output end of the control battery, and the obtaining the current voltage of the control battery includes:
and receiving an analog quantity signal of the current voltage of the control storage battery, which is detected by the control storage battery detection system.
Optionally, the control storage battery detection system and the controller are in data communication in a communication bus mode.
In order to solve the technical problems, the invention also provides a control system for under-voltage protection, which is applied to a controller of an under-voltage protection device, wherein the under-voltage protection device further comprises a first under-voltage relay and a second under-voltage relay, the coils of the first under-voltage relay and the coils of the second under-voltage relay are connected in parallel at two ends of a control storage battery, and one end of a contact of the first under-voltage relay and one end of a contact of the second under-voltage relay are connected with an input end of the controller; the control system includes:
The contact action condition determining unit is used for determining the contact action condition of the first under-voltage relay and the contact action condition of the second under-voltage relay, and a first voltage setting value corresponding to the first under-voltage relay is different from a second voltage setting value corresponding to the second under-voltage relay;
the fault determining unit is used for judging whether the first under-voltage relay or the second under-voltage relay has faults or not based on the first voltage setting value, the second voltage setting value, the contact action condition of the first under-voltage relay and the contact action condition of the second under-voltage relay; if yes, triggering a voltage acquisition unit;
the voltage acquisition unit is used for acquiring the current voltage of the control storage battery and determining whether the control storage battery has an under-voltage condition and the fault conditions of the first under-voltage relay and the second under-voltage relay based on the current voltage of the control storage battery.
In order to solve the technical problem, the present invention further provides an electronic device, including:
a memory for storing a computer program;
and the controller is used for realizing the steps of the control method of the undervoltage protection.
To solve the above technical problem, the present invention further provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of the control method for under-voltage protection as described above.
The invention provides a control method for undervoltage protection, which is characterized in that whether the first undervoltage relay and the second undervoltage relay have faults or not is determined through the contact action condition of the first undervoltage relay, the contact action condition of the second undervoltage relay and the voltage setting values corresponding to the two undervoltage relays, and when the two undervoltage relays have faults, the current voltage of a control storage battery is further obtained to judge whether the control storage battery has the undervoltage condition or not, so that the judgment on whether the control storage battery of an electric locomotive has the undervoltage can be quickly and accurately realized, meanwhile, the accurate diagnosis on whether the two undervoltage relays have the faults can be also realized, the error protection of the locomotive caused by the faults of the undervoltage relays is avoided, the accuracy and the reliability of the judgment process on whether the control storage battery has the undervoltage are further improved, the electric locomotive is simple and easy to operate, the control circuit or the control system of the electric locomotive is not required to be modified, and the reliability of the whole vehicle is improved.
The invention also provides a control system, electronic equipment and computer readable storage medium for the undervoltage protection, which have the same beneficial effects as the control method for the undervoltage protection.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the prior art and the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a control method for under-voltage protection according to the present invention;
FIG. 2 is a schematic diagram of an undervoltage relay according to the present invention;
FIG. 3 is a schematic diagram of an under-voltage protection device according to the present invention;
FIG. 4 is a flow chart of another control method for under-voltage protection according to the present invention;
FIG. 5 is a schematic diagram of a control system with under-voltage protection according to the present invention;
fig. 6 is a schematic structural diagram of an electronic device according to the present invention.
Detailed Description
The core of the invention is to provide a control method, a system, electronic equipment and a storage medium for under-voltage protection, which can rapidly and accurately judge whether the storage battery of the electric locomotive is under-voltage or not, and can also accurately diagnose whether two under-voltage relays are out of order, so that the error protection of the locomotive caused by the failure of the under-voltage relays is avoided, the accuracy and the reliability of the judgment process for whether the storage battery is under-voltage or not are further improved, the control circuit or the control system of the electric locomotive is not required to be modified, the normal operation of the electric locomotive is ensured, and the reliability of the whole vehicle is improved.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a flow chart of a control method for under-voltage protection according to the present invention; referring to fig. 2, fig. 2 is a schematic structural diagram of an under-voltage relay according to the present invention; in order to solve the technical problems, the invention provides a control method of under-voltage protection, which is applied to a controller of an under-voltage protection device, wherein the under-voltage protection device further comprises a first under-voltage relay and a second under-voltage relay, a coil of the first under-voltage relay and a coil of the second under-voltage relay are connected in parallel at two ends of a control storage battery, and one end of a contact of the first under-voltage relay and one end of a contact of the second under-voltage relay are connected with an input end of the controller; the control method comprises the following steps:
S11: determining the contact action condition of a first under-voltage relay and the contact action condition of a second under-voltage relay, wherein the first voltage setting value corresponding to the first under-voltage relay is different from the second voltage setting value corresponding to the second under-voltage relay;
it can be understood that the under-voltage relay can realize relay contact action according to the voltage, and belongs to a pure mechanical device; after setting a voltage setting value corresponding to the under-voltage relay according to actual application conditions, connecting two ends of a coil of the under-voltage relay in parallel with two ends of a control storage battery, connecting an input end of a controller with one end of a contact of the under-voltage relay, determining a contact action condition of the under-voltage relay according to a voltage change condition of the end of the under-voltage relay, and when the voltage of the two ends of the control storage battery, namely, the output voltage of the control storage battery is smaller than the voltage setting value, enabling the contact of the under-voltage relay to act, thereby realizing voltage protection of the control storage battery.
Meanwhile, in consideration of the reliability and safety of the operation of the control storage battery and the vehicle, the control storage battery is usually divided into two grades of undervoltage early warning and undervoltage protection when the undervoltage relay is arranged, so that the protection processes of the two grades of undervoltage early warning and undervoltage protection are usually realized by arranging a first undervoltage relay and a second undervoltage relay respectively, and once the output voltage of the control storage battery is lower than 77V, the control storage battery cannot normally output a control power supply, the control system of an electric locomotive, the relay, a contactor and other parts cannot normally operate, and the locomotive cannot normally operate, so that the undervoltage protection of the control storage battery is required to be directly carried out at the moment; when the output voltage of the control storage battery is lower than 88V, the control storage battery can normally output the control power supply at the moment, and the electric locomotive can normally operate at the moment, but the voltage is lower, so that abnormal conditions are likely to be caused, and under-voltage early warning of the control storage battery is needed at the moment, so that operators can timely find possible under-voltage conditions, and the situation that the vehicle cannot normally work is avoided.
S12: judging whether the first under-voltage relay or the second under-voltage relay has faults or not based on the first voltage setting value, the second voltage setting value, the contact action condition of the first under-voltage relay and the contact action condition of the second under-voltage relay;
it is to be understood that the controller may determine, according to the setting manners of the first under-voltage relay and the second under-voltage relay, a first voltage setting value corresponding to the first under-voltage relay and a second voltage setting value corresponding to the second under-voltage relay, so as to determine, according to the contact action condition of the first under-voltage relay and the contact action condition of the second under-voltage relay, what state the output voltage of the battery is controlled in at this time, and determine whether the contact action condition of the first under-voltage relay and the contact action condition of the second under-voltage relay are consistent with the magnitude condition of the voltage setting values corresponding to the contact action condition of the first under-voltage relay and the contact action condition of the second under-voltage relay, thereby determining whether the first under-voltage relay or the second under-voltage relay has a fault.
Specifically, taking the case that the first voltage setting value is greater than the second setting value as an example, if the output voltage of the storage battery is controlled to drop, the output voltage of the storage battery should be smaller than the second voltage setting value after a period of time less than the first voltage setting value, at this time, if the first under-voltage relay and the second under-voltage relay have the contact action, the contact of the first under-voltage relay must act before the contact of the second under-voltage relay, and when the contact of the second under-voltage relay acts before the contact of the first under-voltage relay, at least one of the first under-voltage relay or the second under-voltage relay is proved to have the fault condition. When the first voltage setting value is smaller than the second setting value, the contact of the second under-voltage relay should act before the contact of the first under-voltage relay.
S13: if yes, the current voltage of the control storage battery is obtained, and whether the control storage battery has an under-voltage condition and the fault conditions of the first under-voltage relay and the second under-voltage relay are determined based on the current voltage of the control storage battery.
It can be understood that when the first under-voltage relay or the second under-voltage relay fails, at this time, an error will exist in the judgment result of the output voltage of the control storage battery according to the contact action of the first under-voltage relay and the contact action of the second under-voltage relay, and the judgment of the accurate and effective under-voltage protection and the under-voltage early warning on the control storage battery cannot be realized only by the contact action of the first under-voltage relay and the contact action of the second under-voltage relay, so that the controller needs to acquire the output condition of the current voltage of the control storage battery at this time, and then judge the output voltage condition of the control storage battery according to the acquired current voltage, thereby judging whether the under-voltage condition occurs on the control storage battery, and executing the corresponding operations of under-voltage protection and under-voltage early warning.
It is not easy to understand that if the first under-voltage relay and the second under-voltage relay have no faults, it is indicated that the first under-voltage relay and the second under-voltage relay can normally and accurately judge the current voltage output condition of the control storage battery, at this time, the output voltage condition of the control storage battery can be determined directly according to the contact action condition of the first under-voltage relay and the second under-voltage relay, and the processes of under-voltage protection, under-voltage early warning and the like of the control storage battery are realized. The specific implementation manner of the controller to obtain the current voltage of the storage battery is not particularly limited herein, and the method can be realized by additionally arranging a detection module or an acquisition device.
It should be noted that, the specific types and implementation manners of the first under-voltage relay, the second under-voltage relay, the controller, and the like are not particularly limited herein, the controller may be implemented in various manners such as a control chip or a control circuit, and specific values of the first voltage setting value and the second voltage setting value corresponding to the first under-voltage relay and the second under-voltage relay may be set according to actual application scenarios.
It can be understood that the control method of the undervoltage protection provided by the invention is suitable for the rail transit electric locomotive industry, and is used as an undervoltage protection device and a control method of a control storage battery of an electric locomotive to realize the undervoltage protection process of the control storage battery of the electric locomotive, and the control storage battery mainly provides a Direct Current (DC) 110V control power supply for the electric locomotive, so as to drive a control system of the electric locomotive, a contactor and other control equipment, and realize the normal operation of the electric locomotive. The control method of the under-voltage protection provided by the invention can also be applied to control storage batteries of other types of vehicles or storage batteries of other types, and the under-voltage protection process is realized.
The invention provides a control method for undervoltage protection, which is characterized in that whether the first undervoltage relay and the second undervoltage relay have faults or not is determined through the contact action condition of the first undervoltage relay, the contact action condition of the second undervoltage relay and the voltage setting values corresponding to the two undervoltage relays, and when the two undervoltage relays have faults, the current voltage of a control storage battery is further obtained to judge whether the control storage battery has the undervoltage condition or not, so that the judgment on whether the control storage battery of an electric locomotive has the undervoltage can be quickly and accurately realized, meanwhile, the accurate diagnosis on whether the two undervoltage relays have the faults can be also realized, the error protection of the locomotive caused by the faults of the undervoltage relays is avoided, the accuracy and the reliability of the judgment process on whether the control storage battery has the undervoltage are further improved, the electric locomotive is simple and easy to operate, the control circuit or the control system of the electric locomotive is not required to be modified, and the reliability of the whole vehicle is improved.
On the basis of the above embodiment, please refer to fig. 3, fig. 3 is a schematic structural diagram of an under-voltage protection device provided by the present invention; referring to fig. 4, fig. 4 is a flow chart of another control method for under-voltage protection according to the present invention.
As an alternative embodiment, when the first voltage setting value corresponding to the first under-voltage relay is greater than the second voltage setting value corresponding to the second under-voltage relay, judging whether the first under-voltage relay or the second under-voltage relay has a fault based on the first voltage setting value, the second voltage setting value, the contact action condition of the first under-voltage relay and the contact action condition of the second under-voltage relay, including:
when the contact of the first under-voltage relay does not act and the contact of the second under-voltage relay acts, judging that the first under-voltage relay or the second under-voltage relay has faults;
when the contact of the first undervoltage relay and the contact of the second undervoltage relay do not act, judging that the first undervoltage relay or the second undervoltage relay has no fault, and controlling the storage battery to have no undervoltage condition;
when the contact of the first undervoltage relay acts and the contact of the second undervoltage relay does not act, judging that the first undervoltage relay or the second undervoltage relay has no fault, and controlling the storage battery to have no undervoltage condition, but having undervoltage risk;
When the contact of the first undervoltage relay and the contact of the second undervoltage relay act, the first undervoltage relay or the second undervoltage relay has no fault, and the condition that the storage battery is under undervoltage is judged and controlled.
It can be appreciated that the fault condition of the first under-voltage relay and the second under-voltage relay and the judgment of whether the under-voltage condition and the under-voltage risk occur in the control storage battery can be realized based on the first voltage setting value, the second voltage setting value, the contact action condition of the first under-voltage relay and the contact action condition of the second under-voltage relay. When the first voltage setting value is larger than the second setting value, if the first under-voltage relay and the second under-voltage relay have the condition of contact action, the contact of the first under-voltage relay should act before the contact of the second under-voltage relay, based on the contact, the fault conditions of the first under-voltage relay and the second under-voltage relay can be judged, and the judgment on whether the storage battery has under-voltage conditions and under-voltage risks or not can be realized under the condition that the first under-voltage relay and the second under-voltage relay have no faults.
It is easy to understand that according to the first voltage setting value, the second voltage setting value, the contact action condition of the first under-voltage relay and the contact action condition of the second under-voltage relay, the fault condition of the first under-voltage relay and the second under-voltage relay and the accurate judgment of whether the under-voltage condition and the under-voltage risk occur in the control storage battery can be realized, the whole scheme is simple and easy to implement, the original control circuit of the electric locomotive and the control system of the locomotive are not required to be independently modified, the accurate judgment of whether the under-voltage occurs in the control storage battery of the locomotive can be realized, the error protection of the locomotive caused by the fault of the under-voltage relay is avoided, the normal operation of the electric locomotive is ensured, and the reliability of the vehicle is improved.
As an alternative embodiment, when the first voltage setting value corresponding to the first under-voltage relay is greater than the second voltage setting value corresponding to the second under-voltage relay, determining whether the control battery has an under-voltage condition and a fault condition of the first under-voltage relay and the second under-voltage relay based on the current voltage of the control battery includes:
judging whether the current voltage of the storage battery is smaller than a preset voltage value, wherein the preset voltage value is larger than a second voltage setting value corresponding to the second under-voltage relay and smaller than a first voltage setting value corresponding to the first under-voltage relay;
if yes, judging that the storage battery is under voltage, and the first under voltage relay fails;
if not, judging that the storage battery is not under-voltage, and the second under-voltage relay fails.
It can be understood that after the controller obtains the current voltage of the control storage battery, the controller also needs to judge whether the under-voltage condition of the control storage battery occurs by judging whether the current voltage of the control storage battery is smaller than the preset voltage value, and after the accurate judgment of whether the under-voltage condition of the control storage battery occurs is completed, the controller judges the fault conditions of the first under-voltage relay and the second under-voltage relay according to the under-voltage condition of the control storage battery. At this time, the contact of the first under-voltage relay does not act, but the contact of the second under-voltage relay acts, at least one of the first under-voltage relay and the second under-voltage relay has a fault, if the control storage battery has an under-voltage, the contact of the first under-voltage relay and the contact of the second under-voltage relay should act, but at this time, the contact of the first under-voltage relay does not act, so that the fault of the first under-voltage relay can be judged; if the control storage battery is not under-voltage, the contacts of the first under-voltage relay and the second under-voltage relay are not operated, but the contacts of the second under-voltage relay are operated at the moment, so that the second under-voltage relay can be judged to be out of order.
It should be noted that, specific values of the preset voltage values are not limited herein, when the first voltage setting value corresponding to the first under-voltage relay is greater than the second voltage setting value corresponding to the second under-voltage relay, the preset voltage value is generally set to be greater than the second voltage setting value corresponding to the second under-voltage relay and less than the first voltage setting value corresponding to the first under-voltage relay, and when the output condition of the control storage battery is less than the second voltage setting value, the control storage battery is controlled to have an under-voltage condition, and the vehicle cannot be driven to normally work; when the output condition of the control storage battery is larger than the second voltage setting value and smaller than the preset voltage value, the control storage battery is not under-voltage, but the output voltage is already in a very small condition, and under-voltage early warning is needed to be immediately carried out so as to be convenient for operators to process in time; when the output condition of the control storage battery is larger than a preset voltage value and smaller than a first voltage setting value, the control storage battery is not under-voltage, but the output voltage is in a smaller condition, and under-voltage early warning is needed; when the output condition of the control storage battery is larger than the first voltage setting value, the control storage battery is not under-voltage condition, and can work normally.
Specifically, taking the first under-voltage relay as an example, the second under-voltage relay as a 77V under-voltage relay, and combining with the controller, the control and judgment of the under-voltage protection are comprehensively performed, and at this time, the preset voltage value in the controller can be set to 83V. If the 88V undervoltage relay and the 77V undervoltage relay are not operated, judging that the storage battery is not under voltage, and the locomotive is not under voltage and can normally operate; if the 88V under-voltage relay is operated and the 77V under-voltage relay is not operated, judging that the locomotive is only under-voltage of 88V and can normally run, but prompting a driver that the storage battery is under-voltage; if the 88V undervoltage relay does not act and the 77V undervoltage relay acts, judging that a certain relay has a fault, and judging whether the control storage battery is really undervoltage or not according to the output condition of the current voltage of the control storage battery acquired by the controller; if the 88V undervoltage relay and the 77V undervoltage relay are both operated, the condition that the storage battery is under-voltage is judged and controlled, the locomotive is under-voltage and cannot normally run, and operations such as stopping and closing are required to be executed to ensure safety.
It is easy to understand that after the controller obtains the current voltage of the control storage battery, the controller needs to judge whether the control storage battery has an under-voltage condition and the fault conditions of the two under-voltage relays according to the current voltage of the control storage battery, so that how to determine the control storage battery condition according to the current voltage and further realize the accurate positioning process of the fault conditions of the two under-voltage relays is further perfected, the operator can conveniently remove the faults in time, and the reliability and the safety of the whole vehicle are ensured.
As an optional embodiment, the under-voltage protection device further includes a prompt module, and the control method further includes:
when any one or more of the condition of controlling the storage battery to have the under-voltage, the condition of controlling the first under-voltage relay to have the fault and the condition of controlling the second under-voltage relay to have the fault exist, the control prompt module executes the corresponding prompt strategy.
It can be understood that when the control storage battery has an under-voltage condition, the first under-voltage relay has a fault, the second under-voltage relay has a fault, and the control storage battery has an under-voltage risk, certain prompt and early warning are needed to be carried out, so that operators can conveniently know the corresponding fault conditions in time, and a prompt module connected with the controller can be additionally arranged to prompt and alarm the fault conditions. The specific type and implementation mode of the prompting module are not particularly limited, the prompting module can be realized in modes such as an indicator lamp, a buzzer and an audible and visual alarm, the prompting and the early warning of different fault conditions can be realized in different prompting modes, and a plurality of prompting sub-modules can also be arranged to distinguish the fault conditions corresponding to the fault conditions.
Specifically, a prompt module connected with the controller can be additionally arranged, the process of prompting and alarming different fault conditions is realized, the fault conditions of the storage battery, the first under-voltage relay and the second under-voltage relay are intuitively and definitely reflected, so that an operator can find the fault conditions in time conveniently, and perform corresponding fault removal operation, and the reliability and safety of the whole vehicle are further ensured.
As an alternative embodiment, the fixed end of the contact of the first under-voltage relay is connected with the power supply, the first switching end is connected with the input end of the controller, the second switching end is suspended, the fixed end of the contact of the second under-voltage relay is connected with the power supply, the first switching end is connected with the input end of the controller, the second switching end is suspended, and the contact action condition of the first under-voltage relay and the contact action condition of the second under-voltage relay are determined, including:
determining the contact action condition of the first under-voltage relay based on the difference of level signals before and after contact switching of the first under-voltage relay;
and determining the contact action condition of the second under-voltage relay based on the difference of the level signals before and after contact switching of the second under-voltage relay.
It is to be understood that the fixed end of the contact of the undervoltage relay may be connected to a power supply, the two switching ends are respectively connected to or suspended from the Input end of the controller, the power supply may be directly implemented by using a direct current control circuit for controlling the Output of the battery, the Input end of the controller may adopt an IO (Input/Output) module to implement the collection of the contact action condition of the first undervoltage relay and the contact action condition of the second undervoltage relay, the working principles of the first undervoltage relay and the second undervoltage relay are the same, taking fig. 2 as an example, dc+ represents the positive electrode for controlling the Output voltage of the battery, DC-represents the negative electrode for controlling the Output voltage of the battery, A1 and A2 are both ends of the coil of the undervoltage relay, when the control current dc+ is greater than the corresponding voltage setting value, the fixed end 11 of the contact and the second switching end 14 of the contact are closed, and at this time the Input end of the controller may use the signal collected by the IO module as a 0, i.e. a low level signal, and the control current Output by the battery is greater than the voltage setting value. On the contrary, when the control power DC+ is smaller than the voltage setting value, the contact of the under-voltage relay does not act, the fixed end 11 of the contact is closed with the first switching end 12 of the contact, the signal collected by the IO module is 1, namely a high-level signal, and the control power output by the control storage battery is smaller than the voltage setting value.
Specifically, the contact action condition of the corresponding under-voltage relay can be determined through the difference of the level signals before and after the contact switching of the under-voltage relay, the whole connection structure of the under-voltage relay is simple and easy to realize, and the controller can accurately acquire the contact action condition of the first under-voltage relay and the contact action condition of the second under-voltage relay according to the level signals.
As an alternative embodiment, the undervoltage protection device further includes a control battery detection system, an input end of the control battery detection system is connected with an output end of the control battery, and the acquisition of the current voltage of the control battery includes:
an analog signal of the current voltage of the control battery detected by the control battery detection system is received.
It is easy to understand that the control storage battery detection system can collect and monitor the analog quantity of the current output voltage of the control storage battery through components such as a voltage sensor, a bus controller and the like, and meanwhile, the control storage battery detection system can also have a bus communication function as a bus control device in consideration of the data communication between the control storage battery detection system and the controller; when the analog quantity signal of the current output voltage of the storage battery is collected, the storage battery detection system is controlled to send the analog quantity signal to the controller through bus communication, and the controller receives the bus signal corresponding to the analog quantity of the current voltage of the storage battery through bus communication, so that whether the locomotive is under voltage really is judged. The specific type and implementation of the control battery detection system are not particularly limited herein, and the control battery detection system may be implemented by a detection device such as a voltage sensor, and the control battery detection system and the controller are not particularly limited herein, but are not limited to the communication bus system described above.
Specifically, the controller accurately judges whether the control storage battery is under voltage or not in the electric locomotive by collecting the states of the first under voltage relay and the second under voltage relay, namely the contact action condition and combining the collection function of the control storage battery detection system on the voltage analog quantity of the output voltage of the control storage battery, so that locomotive error protection caused by failure of the under voltage relay is avoided, normal operation of the electric locomotive is ensured, and reliability of a vehicle is improved.
As an alternative embodiment, the control battery detection system and the controller are in data communication via a communication bus.
It will be appreciated that the control of the data communication between the battery detection system and the controller may be via a communication bus, and the specific type and implementation of the communication bus is not particularly limited herein.
Specifically, the communication bus has the advantages of high reliability, easy expansion, easy installation, simple structure and easy wiring, is favorable for flexibly realizing the control method of the whole undervoltage protection, and further expands the application range of the whole undervoltage protection device.
Taking fig. 3 and fig. 4 as an example, the undervoltage protection device includes an IO module, a CCU (Central Control Unit ) module as a controller, an HMI (Human Machine Interface, human-computer interface) module for displaying and prompting, and a control battery detection system, the undervoltage relay adopts an 88V undervoltage relay and a 77V undervoltage relay, a preset voltage value is set to 83V, other modules can be further arranged in the undervoltage protection device to realize other functions, the data communication and control are performed between the modules through a communication bus, the states of the 88V undervoltage relay and the 77V undervoltage relay are collected by the IO module, the IO module sends the states of the two undervoltage relays, namely, contact action conditions, to the CCU module, and the CCU module combines the states of the two undervoltage relays sent by the IO module and analog quantity signals corresponding to the current voltage of a control battery sent by a control battery detection system to perform logic control and judgment to realize the undervoltage protection operation of the control battery, and the state display and fault prompting are performed by the HMI module.
Specifically, the logic control and judgment process of the controller specifically includes: if the 88V undervoltage relay and the 77V undervoltage relay are not operated, judging that the locomotive is not undervoltage and can normally operate; if the 88V under-voltage relay is operated and the 77V under-voltage relay is not operated, judging that the locomotive is only under-voltage of 88V and can normally run, but prompting a driver that the storage battery is under-voltage risk by the HMI module; if the 88V undervoltage relay and the 77V undervoltage relay are both operated, judging that the locomotive is undervoltage and cannot normally run, and stopping and closing are needed; if the 88V undervoltage relay does not act and the 77V undervoltage relay acts, judging that one of the two undervoltage relays has a fault, and then carrying out the following comprehensive judgment according to the current voltage analog quantity of the storage battery collected by the storage battery detection system: if the current voltage analog quantity of the accumulator is more than or equal to 83V, the locomotive is not under-voltage, only the 77V under-voltage relay is in fault, the locomotive can normally run, but the 77V under-voltage relay is prompted to be in fault through the HMI; if the current voltage analog quantity of the storage battery is less than 83V, the locomotive is indicated to be under-voltage, and the 88V under-voltage relay is failed and is not operated correctly, and at the moment, the locomotive cannot run normally and needs to be stopped and closed.
The whole undervoltage protection device collects the states of the 88V undervoltage relay and the 77V undervoltage relay through the IO module, and the accurate judgment of whether the electric locomotive controls the storage battery to be undervoltage or not and whether the undervoltage relay is out of order is completed by combining the storage battery voltage analog quantity collected by the storage battery detection system; the method realizes accurate judgment on whether the storage battery is under voltage or not for controlling the electric locomotive, synchronously diagnoses whether the 88V under voltage relay and the 77V under voltage relay are out of order, avoids locomotive error protection caused by the failure of the under voltage relay, ensures the normal operation of the electric locomotive and improves the reliability of the vehicle. The method has good applicability to the electric locomotive, can be realized by only modifying the control logic of the CCU module and the HMI module on the basis of the original TCMS (Train Control and Management System train control and management system) system of the locomotive, does not need to modify hardware equipment and an electric circuit, is simple and easy to implement, and can quickly and accurately realize whether the storage battery is under-voltage or not and the accurate diagnosis of whether the under-voltage relay is out of order or not.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a control system for under-voltage protection according to the present invention; in order to solve the technical problems, the invention also provides a control system for under-voltage protection, which is applied to a controller of an under-voltage protection device, wherein the under-voltage protection device further comprises a first under-voltage relay and a second under-voltage relay, the coils of the first under-voltage relay and the coils of the second under-voltage relay are connected in parallel at two ends of a control storage battery, and one end of a contact of the first under-voltage relay and one end of a contact of the second under-voltage relay are connected with an input end of the controller; the control system includes:
A contact action condition determining unit 11, configured to determine a contact action condition of the first under-voltage relay and a contact action condition of the second under-voltage relay, where a first voltage setting value corresponding to the first under-voltage relay is different from a second voltage setting value corresponding to the second under-voltage relay;
a fault determining unit 12, configured to determine whether a fault exists in the first under-voltage relay or the second under-voltage relay based on the first voltage setting value, the second voltage setting value, a contact action condition of the first under-voltage relay, and a contact action condition of the second under-voltage relay; if yes, triggering a voltage acquisition unit;
the voltage acquisition unit 13 is configured to acquire a current voltage of the control battery, and determine whether an under-voltage condition occurs in the control battery and a fault condition of the first under-voltage relay and the second under-voltage relay based on the current voltage of the control battery.
As an alternative embodiment, when the first voltage setting value corresponding to the first under-voltage relay is greater than the second voltage setting value corresponding to the second under-voltage relay, the fault determining unit 12 includes:
The first judging unit is used for judging that the first under-voltage relay or the second under-voltage relay has faults when the contact of the first under-voltage relay does not act and the contact of the second under-voltage relay acts;
the second judging unit is used for judging that the first undervoltage relay or the second undervoltage relay has no fault and the control storage battery has no undervoltage condition when the contact of the first undervoltage relay and the contact of the second undervoltage relay do not act;
the third judging unit is used for judging that the first undervoltage relay or the second undervoltage relay has no fault and the control storage battery has no undervoltage condition but has undervoltage risk when the contact of the first undervoltage relay acts and the contact of the second undervoltage relay does not act;
and the fourth judging unit is used for judging that the first under-voltage relay or the second under-voltage relay has no fault and the control storage battery has under-voltage condition when the contact of the first under-voltage relay and the contact of the second under-voltage relay act.
As an alternative embodiment, when the first voltage setting value corresponding to the first under-voltage relay is greater than the second voltage setting value corresponding to the second under-voltage relay, the voltage obtaining unit 13 includes:
The judging unit is used for judging whether the current voltage of the control storage battery is smaller than a preset voltage value, wherein the preset voltage value is larger than a second voltage setting value corresponding to the second under-voltage relay and smaller than a first voltage setting value corresponding to the first under-voltage relay; if yes, triggering a fifth judging unit, and if not, triggering a sixth judging unit;
the fifth judging unit is used for judging that the control storage battery has an undervoltage condition and the first undervoltage relay has a fault;
and the sixth judging unit is used for judging that the control storage battery has no under-voltage condition and the second under-voltage relay has faults.
As an optional embodiment, the under-voltage protection device further includes a prompt module, and further includes:
and the prompting unit is used for controlling the prompting module to execute a corresponding prompting strategy when any one or more of the under-voltage condition of the control storage battery, the failure of the first under-voltage relay and the failure of the second under-voltage relay exist.
As an alternative embodiment, the fixed end of the contact of the first under-voltage relay is connected with a power supply, the first switching end is connected with the input end of the controller, the second switching end is suspended, the fixed end of the contact of the second under-voltage relay is connected with the power supply, the first switching end is connected with the input end of the controller, the second switching end is suspended, and the contact action condition determining unit 11 includes:
A first contact action condition determining subunit, configured to determine a contact action condition of the first under-voltage relay based on a difference in level signals before and after contact switching of the first under-voltage relay;
and the second contact action condition determining subunit is used for determining the contact action condition of the second under-voltage relay based on the difference of the level signals before and after contact switching of the second under-voltage relay.
As an alternative embodiment, the undervoltage protection device further includes a control battery detection system, an input terminal of the control battery detection system is connected to an output terminal of the control battery, and the voltage acquisition unit 13 includes:
and the analog quantity receiving unit is used for receiving the analog quantity signal of the current voltage of the control storage battery detected by the control storage battery detection system.
For the description of the control system for under-voltage protection provided by the present invention, reference is made to the embodiment of the control method for under-voltage protection, and the description of the present invention is omitted herein.
Referring to fig. 6, fig. 6 is a schematic structural diagram of an electronic device according to the present invention. In order to solve the technical problem, the present invention further provides an electronic device, including:
A memory 21 for storing a computer program;
a controller 22 for implementing the steps of the control method of the under-voltage protection as described above.
Among other things, the controller 22 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and the like. The controller 22 may be implemented in at least one hardware form of a DSP (Digital Signal Processor ), FPGA (Field-Programmable Gate Array, field programmable gate array), PLA (Programmable Logic Array ). The controller 22 may also include a main processor, which is a processor for processing data in an awake state, also called a central processor, and a coprocessor; a coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the controller 22 may integrate a GPU (graphics processing unit, graphics processor) for taking care of rendering and drawing of the content that the display screen is required to display. In some embodiments, the controller 22 may also include an AI (Artificial Intelligence ) processor for processing computing operations related to machine learning.
Memory 21 may include one or more computer-readable storage media, which may be non-transitory. Memory 21 may also include high-speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In this embodiment, the memory 21 is at least used for storing a computer program, where the computer program is loaded and executed by the controller 22 to implement the relevant steps of the control method for under-voltage protection disclosed in any one of the foregoing embodiments. In addition, the resources stored in the memory 21 may also include an operating system, data, and the like, and the storage manner may be transient storage or permanent storage. The operating system may include Windows, unix, linux, among others. The data may include, but is not limited to, data of a control method of under-voltage protection, and the like.
In some embodiments, the electronic device may further include a display screen, an input-output interface, a communication interface, a power supply, and a communication bus.
It will be appreciated by those skilled in the art that the structure shown in fig. 6 is not limiting of the electronic device and may include more or fewer components than shown.
For the description of the electronic device provided by the present invention, reference is made to the embodiment of the control method for under-voltage protection, and the description of the embodiment is omitted herein.
To solve the above technical problem, the present invention further provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of the control method for under-voltage protection as described above.
It will be appreciated that the methods of the above embodiments, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored on a computer readable storage medium. With such understanding, the technical solution of the present application, or a part contributing to the prior art or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium, performing all or part of the steps of the method described in the various embodiments of the present application. In particular, the computer readable storage medium may include, but is not limited to, any type of disk including floppy disks, optical disks, and removable hard disks, etc., or any type of medium or device suitable for storing instructions, data, etc., which are not particularly limited herein.
For an introduction of a computer readable storage medium provided by the present invention, please refer to an embodiment of the control method for under-voltage protection, and the disclosure is not repeated herein.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The control method for the under-voltage protection is characterized by being applied to a controller of the under-voltage protection device, wherein the under-voltage protection device further comprises a first under-voltage relay and a second under-voltage relay, the coil of the first under-voltage relay and the coil of the second under-voltage relay are connected in parallel at two ends of a control storage battery, and one end of a contact of the first under-voltage relay and one end of a contact of the second under-voltage relay are connected with an input end of the controller; the control method comprises the following steps:
determining the contact action condition of the first under-voltage relay and the contact action condition of the second under-voltage relay, wherein a first voltage setting value corresponding to the first under-voltage relay is different from a second voltage setting value corresponding to the second under-voltage relay;
judging whether the first under-voltage relay or the second under-voltage relay has faults or not based on the first voltage setting value, the second voltage setting value, the contact action condition of the first under-voltage relay and the contact action condition of the second under-voltage relay;
if yes, the current voltage of the control storage battery is obtained, and whether the control storage battery has an under-voltage condition and the fault conditions of the first under-voltage relay and the second under-voltage relay are determined based on the current voltage of the control storage battery.
2. The control method of undervoltage protection as recited in claim 1, wherein when a first voltage setting value corresponding to the first undervoltage relay is greater than a second voltage setting value corresponding to the second undervoltage relay, the determining whether the first undervoltage relay or the second undervoltage relay has a fault based on the first voltage setting value, the second voltage setting value, a contact action condition of the first undervoltage relay, and a contact action condition of the second undervoltage relay includes:
when the contact of the first under-voltage relay does not act and the contact of the second under-voltage relay acts, judging that the first under-voltage relay or the second under-voltage relay has faults;
when the contact of the first undervoltage relay and the contact of the second undervoltage relay do not act, judging that the first undervoltage relay or the second undervoltage relay has no fault, and the control storage battery has no undervoltage condition;
when the contact of the first undervoltage relay acts and the contact of the second undervoltage relay does not act, judging that the first undervoltage relay or the second undervoltage relay has no fault, and the control storage battery has no undervoltage condition but has undervoltage risk;
When the contact of the first undervoltage relay and the contact of the second undervoltage relay act, the first undervoltage relay or the second undervoltage relay has no fault, and the undervoltage condition of the control storage battery is judged.
3. The control method of undervoltage protection as recited in claim 1, wherein when a first voltage setting value corresponding to the first undervoltage relay is greater than a second voltage setting value corresponding to the second undervoltage relay, the determining whether the control battery has an undervoltage condition and a failure condition of the first undervoltage relay and the second undervoltage relay based on a current voltage of the control battery includes:
judging whether the current voltage of the control storage battery is smaller than a preset voltage value, wherein the preset voltage value is larger than a second voltage setting value corresponding to the second under-voltage relay and smaller than a first voltage setting value corresponding to the first under-voltage relay;
if yes, judging that the control storage battery has an under-voltage condition, and the first under-voltage relay has a fault;
if not, judging that the control storage battery has no under-voltage condition, and the second under-voltage relay has faults.
4. The control method of undervoltage protection as recited in claim 3, wherein the undervoltage protection device further comprises a prompt module, the control method further comprising:
when any one or more of the under-voltage condition of the control storage battery, the failure of the first under-voltage relay and the failure of the second under-voltage relay exist, the prompt module is controlled to execute a corresponding prompt strategy.
5. The control method of undervoltage protection as recited in claim 1, wherein a fixed end of a contact of the first undervoltage relay is connected with a power supply, a first switching end is connected with an input end of the controller, a second switching end is suspended, a fixed end of a contact of the second undervoltage relay is connected with the power supply, a first switching end is connected with an input end of the controller, a second switching end is suspended, and the determining of a contact action condition of the first undervoltage relay and a contact action condition of the second undervoltage relay includes:
determining the contact action condition of the first under-voltage relay based on the difference of level signals before and after contact switching of the first under-voltage relay;
and determining the contact action condition of the second under-voltage relay based on the difference of the level signals before and after contact switching of the second under-voltage relay.
6. The control method of undervoltage protection as recited in any one of claims 1 to 5, wherein the undervoltage protection device further includes a control battery detection system, an input of the control battery detection system is connected to an output of the control battery, and the obtaining the current voltage of the control battery includes:
and receiving an analog quantity signal of the current voltage of the control storage battery, which is detected by the control storage battery detection system.
7. The method for controlling undervoltage protection as recited in claim 6, wherein said control battery detection system and said controller are in data communication via a communication bus.
8. The control system for the under-voltage protection is characterized by being applied to a controller of the under-voltage protection device, wherein the under-voltage protection device further comprises a first under-voltage relay and a second under-voltage relay, the coil of the first under-voltage relay and the coil of the second under-voltage relay are connected in parallel at two ends of a control storage battery, and one end of a contact of the first under-voltage relay and one end of a contact of the second under-voltage relay are connected with an input end of the controller; the control system includes:
The contact action condition determining unit is used for determining the contact action condition of the first under-voltage relay and the contact action condition of the second under-voltage relay, and a first voltage setting value corresponding to the first under-voltage relay is different from a second voltage setting value corresponding to the second under-voltage relay;
the fault determining unit is used for judging whether the first under-voltage relay or the second under-voltage relay has faults or not based on the first voltage setting value, the second voltage setting value, the contact action condition of the first under-voltage relay and the contact action condition of the second under-voltage relay; if yes, triggering a voltage acquisition unit;
the voltage acquisition unit is used for acquiring the current voltage of the control storage battery and determining whether the control storage battery has an under-voltage condition and the fault conditions of the first under-voltage relay and the second under-voltage relay based on the current voltage of the control storage battery.
9. An electronic device, comprising:
a memory for storing a computer program;
a controller for implementing the steps of the control method of under-voltage protection as claimed in any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the control method of under-voltage protection according to any one of claims 1 to 7.
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|---|---|---|---|
| CN202311473150.XA CN117728351A (en) | 2023-11-07 | 2023-11-07 | Control method and system for under-voltage protection, electronic equipment and storage medium |
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| CN202311473150.XA CN117728351A (en) | 2023-11-07 | 2023-11-07 | Control method and system for under-voltage protection, electronic equipment and storage medium |
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| CN202311473150.XA Pending CN117728351A (en) | 2023-11-07 | 2023-11-07 | Control method and system for under-voltage protection, electronic equipment and storage medium |
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