CN113022364B - Tramcar charging control method - Google Patents
Tramcar charging control method Download PDFInfo
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- CN113022364B CN113022364B CN202110489989.7A CN202110489989A CN113022364B CN 113022364 B CN113022364 B CN 113022364B CN 202110489989 A CN202110489989 A CN 202110489989A CN 113022364 B CN113022364 B CN 113022364B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/66—Data transfer between charging stations and vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/26—Rail vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a tramcar charging control method, which is applied to a tramcar charging system, wherein the tramcar charging system comprises a wireless communication unit, a charging control unit and a vehicle-mounted energy storage unit, and the charging control unit and the vehicle-mounted energy storage unit are in communication connection through the wireless communication unit, and the tramcar charging control method comprises the following steps: before the tramcar enters a station, a charging control unit acquires multiple groups of running state data of the vehicle-mounted energy storage unit at the current moment; and setting a preset judgment condition, determining the charging working condition of the charging control unit based on the multiple sets of running state data when the multiple sets of running state data meet the preset judgment condition, and charging the tramcar by the charging control unit according to the charging working condition after the tramcar enters the station. The invention ensures that the tramcar can be charged under a reasonable charging working condition when the tramcar enters the station, shortens the charging time of the tramcar when the tramcar enters the station, avoids secondary damage of unreasonable charging to an energy storage device of the tramcar, and improves the reliability and the safety.
Description
Technical Field
The invention relates to the technical field of energy storage of tramcars, in particular to a tramcar charging control method.
Background
The tramcar has been widely popularized and applied due to the advantages of energy conservation, environmental protection, safety, convenience and the like.
At present, the existing relatively perfect charging system of tram among the prior art, this charging system mainly set up in the station and fill electric pile, detect the tram through electronic tags and get into the station after, supply power for the energy memory on the tram through the pantograph that erects. The charging system usually firstly limits the charging value working voltage of the energy storage device to the upper limit in a constant current charging mode, then enters a constant voltage charging mode, and cuts off power supply until the voltage difference meets a set value, so that charging is completed.
However, in the prior art, the running state of the energy storage device cannot be mastered in the first time when the tramcar enters the station for charging, the charging condition is determined only by detecting the voltage difference between the end voltage of the energy storage device and the output voltage of the charging system, so that the charging current is very easy to cause impact on the energy storage device due to overlarge charging current, the reliability and the safety of the charging system are low, if a trial charging mechanism is adopted, the time for the tramcar to enter the station for charging is greatly prolonged by taking the use condition of the tramcar load and the maximum available capacity of the energy storage device into consideration, the running condition of the energy storage device is not considered, and secondary damage to the vehicle-mounted energy storage device can be caused during charging.
Disclosure of Invention
The embodiment of the application provides a tramcar charging control method, and at least solves the problems that in the prior art, the running state of an energy storage device of a tramcar cannot be mastered in time, the reliability is low, and the safety is low.
In a first aspect, the present invention provides a charging control method for a tramcar, which is applied to a tramcar charging system, wherein a tramcar charging device includes a wireless communication unit, and a charging control unit and a vehicle-mounted energy storage unit that are connected by communication through the wireless communication unit, and the charging control method for the tramcar includes the following steps:
s1: before the tramcar enters a station, the charging control unit acquires multiple groups of running state data of the vehicle-mounted energy storage unit at the current moment;
s2: and setting a preset judgment condition, determining the charging working condition of the charging control unit based on the multiple sets of running state data when the multiple sets of running state data meet the preset judgment condition, and charging the tramcar by the charging control unit according to the charging working condition after the tramcar enters the station.
In some embodiments, the step S2 includes the steps of:
a first preset judgment condition and a second preset judgment condition;
the first preset judgment condition includes: judging whether the difference value between a plurality of groups of running state data at the current moment is smaller than a first preset threshold value or not;
the second preset judgment condition includes: and judging whether the difference value between the multiple groups of running state data at the current moment and the multiple groups of running state data at the next moment is smaller than a second preset threshold value, wherein the number of the multiple groups of running data is two.
In some embodiments, the method for determining the charging condition of the charging control unit in step S2 specifically includes:
the vehicle-mounted energy storage unit comprises a plurality of vehicle-mounted energy storage modules which are connected in parallel, and a plurality of pre-charging currents of the charging control unit are determined based on the operation state data of the plurality of vehicle-mounted energy storage modules.
In some embodiments, the operation status data in step S1 includes:
the system comprises electric quantity state data of the vehicle-mounted energy storage unit, fault state data of the vehicle-mounted energy storage unit and parameter state data of the vehicle-mounted energy storage unit.
In some embodiments, the charging control unit in S2 charges the tramcar according to the charging condition, including:
in the charging process, the charging control unit acquires fault state data of the vehicle-mounted energy storage unit in real time;
if the current-time fault state data are inconsistent with the previous-time fault state data, updating the charging working condition of the charging control unit based on the running state data of the vehicle-mounted energy storage unit at the current time;
and the charging control unit charges the vehicle-mounted energy storage unit according to the updated charging working condition.
In some of these embodiments, further comprising:
s3: and when the difference value between the voltage value of the output end of the charging control unit and the voltage value of the input end of the vehicle-mounted energy storage unit is smaller than a third threshold value, the charging control unit stops charging the vehicle-mounted energy storage unit.
In some of these embodiments, further comprising:
s0: dividing fault levels, acquiring fault state data of the vehicle-mounted energy storage unit in real time before the tramcar enters a station, determining the fault level of the vehicle-mounted energy storage unit based on the fault state data if the vehicle-mounted energy storage unit with the fault exists, controlling the vehicle-mounted energy storage unit to act to eliminate the vehicle-mounted energy storage unit with the fault based on the fault level, and sending the running state data of the vehicle-mounted energy storage unit to the charging control unit.
In some embodiments, the step S2 further includes:
after the tramcar enters the station, the vehicle-mounted energy storage unit acquires the charging condition of the charging control unit;
if the charging condition of the charging control unit is successfully matched with the running state data of the vehicle-mounted energy storage unit, the charging control unit charges the vehicle-mounted energy storage unit according to the charging condition;
if the charging condition of the charging control unit fails to be matched with the running state data of the vehicle-mounted energy storage unit, the charging control unit updates the charging condition of the charging control unit based on the running state data of the vehicle-mounted energy storage unit at the current moment, and the charging control unit charges the vehicle-mounted energy storage unit according to the updated charging condition.
In some embodiments, the step S2 further includes:
in the charging process, when the vehicle-mounted energy storage unit has a fault alarm signal, the fault grade of the vehicle-mounted energy storage unit is determined based on the fault state data of the vehicle-mounted energy storage unit, the vehicle-mounted energy storage unit is controlled to act to eliminate the fault alarm signal based on the fault grade, and after the fault alarm signal is eliminated, the charging control unit continues to charge the vehicle-mounted energy storage unit until the charging is finished.
In some embodiments, the fault level in step S0 includes: primary, secondary, and tertiary faults.
The invention has the technical effects or advantages that:
the invention provides a charging control method of a tramcar, wherein a charging system is used for connecting a charging control unit and a vehicle-mounted energy storage unit in a communication mode through wireless communication, the charging working condition of the charging control unit is determined by acquiring the running state data of the vehicle-mounted energy storage unit before a train enters the station, and the tramcar is charged according to the charging working condition.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention.
Fig. 1 is a block diagram of a tramcar charging system according to an embodiment of the present invention;
fig. 2 is a flowchart of a tramcar charging system according to an embodiment of the present invention;
fig. 3 is a control flow chart of a charging control unit before a tramcar enters a station according to an embodiment of the invention;
fig. 4 is a control flowchart of a charging control unit after a tramcar enters a station according to an embodiment of the present invention;
fig. 5 is a control flowchart of a vehicle-mounted energy storage unit before a tramcar enters a station according to an embodiment of the invention;
fig. 6 is a control flowchart of the vehicle-mounted energy storage unit after the tramcar enters the station according to the embodiment of the invention;
in the above figures:
1. a wireless communication unit; 11. a first wireless communication module; 12. a second wireless communication module; 2. a charging control unit; 21. a charging control module; 22. a charging module; 3. a vehicle-mounted energy storage unit; 31. a vehicle-mounted energy storage module; 32. a vehicle-mounted energy storage module; 33. an energy storage contactor; 34. and a power management module.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description. Although embodiments of the invention are disclosed in the accompanying drawings, it should be understood that the invention can be embodied in any form and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "inside", "outside", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "first," "second," "third," and the like, herein are used to describe various elements, components, regions, layers and/or sections, but only to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Terms such as "first," "second," "third," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, e.g. as a fixed connection, a detachable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention provides a tramcar charging control method, aiming at solving the problems that the running state of an energy storage device of a tramcar can not be mastered in time, the reliability is low and the safety is low in the tramcar charging control method in the prior art, ensuring that the tramcar can be charged under a reasonable charging working condition when the tramcar enters a station, shortening the station-entering charging time of the tramcar, avoiding secondary damage of unreasonable charging to the energy storage device of the tramcar and improving the reliability and the safety.
The technical solution of the present invention will be described in detail below with reference to the specific embodiments and the accompanying drawings.
The embodiment relates to a tramcar charging control method, which is applied to a tramcar charging system, wherein the tramcar charging system comprises a wireless communication unit, a charging control unit and a vehicle-mounted energy storage unit, the charging control unit and the vehicle-mounted energy storage unit are in communication connection through the wireless communication unit, and the tramcar charging control method comprises the following steps:
s1: before the tramcar enters a station, the charging control unit acquires multiple groups of running state data of the vehicle-mounted energy storage unit at the current moment;
s2: and setting a preset judgment condition, determining the charging working condition of the charging control unit based on the multiple sets of running state data when the multiple sets of running state data meet the preset judgment condition, and charging the tramcar by the charging control unit according to the charging working condition after the tramcar enters the station.
According to the charging control method for the tramcar, the charging control unit and the vehicle-mounted energy storage unit are in communication connection through wireless communication in the charging system, the charging working condition of the charging control unit is determined by acquiring the running state data of the vehicle-mounted energy storage unit before a train enters the station, and the tramcar is charged according to the charging working condition, so that the problems that the running state of the tramcar energy storage device cannot be mastered in time, the reliability is low and the safety is low in the prior art tramcar charging control method are solved, the tramcar can be charged under the reasonable charging working condition when the tramcar enters the station, the tramcar entering charging time is shortened, secondary damage to the tramcar energy storage device due to unreasonable charging is avoided, and the reliability and the safety are improved.
Referring to fig. 1, the following describes the structure of the tramcar charging system specifically as follows:
tram charging system includes: wireless communication unit 1, the control unit 2 and the on-vehicle energy storage unit 3 charge, wherein, the control unit 2 that charges passes through the on-vehicle energy storage unit 3 of 1 communication connection of wireless communication unit, and wireless communication unit 1 includes: the vehicle-mounted energy storage system comprises a first wireless communication module 11 and a second wireless communication module 12, wherein the number of the first wireless communication modules 11 is two, the two first wireless communication modules 11 are respectively in communication connection with a vehicle-mounted energy storage unit 3 and the second wireless communication module 12, the two first wireless communication modules 11 are in communication connection with the second wireless communication module 12 through LoRa, the second wireless communication module 12 is in communication connection with a charging control unit 2, the charging control unit 2 comprises a charging control module 21 and a charging module 22, the charging module 22 is formed by sequentially connecting a transformer, a rectifier and a DC/DC (direct current/direct current) in an electric connection mode, the charging control module 21 is in communication connection with the charging module 22, the vehicle-mounted energy storage unit 3 comprises a vehicle-mounted energy storage control unit 31, a plurality of vehicle-mounted energy storage modules 32, a plurality of energy storage contactors 33 and a power management module 34, and the vehicle-mounted energy storage control unit 31 is respectively connected with the plurality of vehicle-mounted energy storage modules 32, a plurality of energy storage contactors 33 and a power management module 34, The plurality of energy storage contactors 33 are in communication connection with the power management module 34, the number of the vehicle-mounted energy storage modules 32 is the same as that of the energy storage contactors 33, each energy storage contactor 33 is electrically connected with each vehicle-mounted energy storage module 32 one by one, the plurality of energy storage contactors 33 are also electrically connected with the DC/DC, and the vehicle-mounted energy storage modules 32 are in communication connection with the charging control module 21 through the first wireless communication module 11 and the second wireless communication module 12.
Specifically, the present embodiment provides a charging control method for a tramcar, which is applied to the tramcar charging system described above, wherein, referring to fig. 2, the charging control method for the tramcar includes the following steps:
s0: the fault grade is divided, fault state data of the vehicle-mounted energy storage unit 3 are acquired in real time before the tramcar enters the station, if the vehicle-mounted energy storage unit 3 with the fault exists, the fault grade of the vehicle-mounted energy storage unit 3 is determined based on the fault state data, the vehicle-mounted energy storage unit 3 is controlled to act to eliminate the fault vehicle-mounted energy storage unit 3 based on the fault grade, and the running state data of the vehicle-mounted energy storage unit 3 is sent to the charging control unit 2.
Specifically, referring to fig. 5, before the tramcar arrives at a station, the vehicle-mounted energy storage control unit 31 acquires the operation state data of the plurality of vehicle-mounted energy storage modules 32 in real time, if a fault vehicle-mounted energy storage module 32 exists, the fault level of the vehicle-mounted energy storage unit 3 is determined based on the fault state data, based on the fault level, the vehicle-mounted energy storage control module 31 controls the power management module 34 to act to eliminate a fault alarm prompt or controls the energy storage contactor 33 electrically connected with the fault vehicle-mounted energy storage module 32 to be disconnected to eliminate the fault vehicle-mounted energy storage module 32, and the vehicle-mounted energy storage control module 31 sends the operation state data of each vehicle-mounted energy storage module 32 to the charging control module 21.
In this embodiment, the fault level in step S0 includes: primary, secondary, and tertiary faults.
Specifically, when a first-level fault occurs, the power management module 34 sends a first-level fault alarm signal and reports the first-level fault alarm signal to the vehicle-mounted energy storage control unit 31, if the first-level fault alarm signal still exists after a period of time, the vehicle-mounted energy storage control unit 31 controls to cut off the energy storage contactor 33 electrically connected with the vehicle-mounted energy storage module 32 with the fault, and after the power management module 34 is reset, the vehicle-mounted energy storage control module 31 for fault elimination can control to close the contactor 33 again; when a secondary fault occurs, the power management module 34 sends out a secondary fault alarm signal and judges the fault type at the same time, outputs a corresponding control instruction according to the fault type and reports the control instruction to the vehicle-mounted energy storage control unit 31, if the secondary fault alarm signal still exists after a period of time, the vehicle-mounted energy storage control module 31 controls to cut off the energy storage contactor 33 electrically connected with the fault vehicle-mounted energy storage module 32, and after the power management module 34 is reset, the vehicle-mounted energy storage control module 31 can control to close the energy storage contactor 33 again after the fault is eliminated; when a three-level fault occurs, under a normal condition, great threat exists on the tramcar and the system, once the power management module 34 sends out a three-level fault alarm signal, the energy storage contactor 33 electrically connected with the fault vehicle-mounted energy storage module 32 is immediately disconnected, and after the power management module 34 is reset, the energy storage contactor 33 is closed again after the three-level fault alarm signal is eliminated.
S1: before the tramcar enters the station, the charging control unit acquires multiple sets of running state data of the vehicle-mounted energy storage unit 3 at the current moment.
In the present embodiment, the operation state data in step S1 includes:
the system comprises electric quantity state data of the vehicle-mounted energy storage unit, fault state data of the vehicle-mounted energy storage unit and parameter state data of the vehicle-mounted energy storage unit.
Specifically, the parameter status data of the vehicle-mounted energy storage unit includes, but is not limited to, a maximum current, a maximum voltage, and the like, and the charging control module 21 obtains two sets of operation status data of the vehicle-mounted energy storage unit 3 at the present time through the wireless communication receiving module 12 and the wireless communication transmitting module 11, that is, obtains operation status data of two sets of the plurality of vehicle-mounted energy storage modules 32 at the present time.
S2: and setting a preset judgment condition, determining the charging working condition of the charging control unit based on the multiple groups of running state data when the multiple groups of running state data meet the preset judgment condition, and charging the vehicle-mounted energy storage unit 3 by the charging control unit according to the charging working condition after the tramcar enters the station.
In this embodiment, the step S2 is to preset the determination condition, which specifically includes:
a first preset judgment condition and a second preset judgment condition;
the first preset judgment condition includes: judging whether the difference value between a plurality of groups of running state data at the current moment is smaller than a first preset threshold value or not;
the second preset judgment condition includes: and judging whether the difference value between the multiple groups of running state data at the current moment and the multiple groups of running state data at the next moment is smaller than a second preset threshold value, wherein the number of the multiple groups of running data is two. In this embodiment, the first threshold and the second threshold may be set according to actual needs, and the specific numerical value is not specifically limited in this embodiment.
In this embodiment, the method for determining the charging condition of the charging control unit in step S2 specifically includes:
the vehicle-mounted energy storage unit 3 comprises a plurality of vehicle-mounted energy storage modules 32 connected in parallel, and a plurality of charging gears of the charging control unit 2 are determined based on the operation state data of the plurality of vehicle-mounted energy storage modules 32.
Specifically, referring to fig. 3, when the multiple sets of running state data satisfy a first preset judgment condition, the charging control module 21 receives the multiple sets of running state data at the next moment, and when the multiple sets of running state data at the current moment and the next moment satisfy a second preset judgment condition, the charging condition of the charging control unit 2 is determined based on the multiple sets of running state data at the current moment, and after the tramcar enters the station, the charging control unit 2 charges the tramcar according to the charging condition.
More specifically, the fault status data of the plurality of on-board energy storage modules 32 determine a plurality of charging gears of the charging control unit 2, specifically as follows:
in the above formula, ICExpressed as the output current, I, of the charge control unit 2EIndicated as the rated charging current of one on-board energy storage module 32, and n indicates the number of normal on-board energy storage modules 32.
In this embodiment, the charging control unit in step S2 charges the tramcar according to the charging condition, which specifically includes:
in the charging process, the charging control unit 2 acquires fault state data of the vehicle-mounted energy storage unit 3 in real time;
if the current-time fault state data is inconsistent with the previous-time fault state data, updating the charging working condition of the charging control unit 2 based on the running state data of the vehicle-mounted energy storage unit 3 at the current time;
and the charging control unit 2 charges the vehicle-mounted energy storage unit 3 according to the updated charging working condition.
Specifically, referring to fig. 4, after detecting that the tram enters the station, the cab of the tram raises the pantograph, and the charging control module 21 controls the charging contactor to close to charge the plurality of vehicle-mounted energy storage modules 32. During the charging process, the charging control module 21 acquires fault state data of the plurality of vehicle-mounted energy storage modules 32 in real time, and when the fault state changes, i.e., a fault is eliminated or a new fault is generated, such as a primary alarm signal or a secondary alarm signal is eliminated, the contactor 33 electrically connected with the vehicle-mounted energy storage module 32 with the fault is closed, or a new fault is generated by other normal vehicle-mounted energy storage modules 32 to cause the fault state to change, and the charging condition of the charging control unit 2 is updated based on the fault state data of the vehicle-mounted energy storage module 32 at the current moment.
In this embodiment, in the step S2, the method further includes:
after the tramcar enters the station, the vehicle-mounted energy storage unit 3 acquires the charging condition of the charging control unit 2;
if the charging condition of the charging control unit 2 is successfully matched with the running state data of the vehicle-mounted energy storage unit 3, the charging control unit 2 charges the vehicle-mounted energy storage unit 3 according to the charging condition;
if the charging condition of the charging control unit 2 fails to match the running state data of the vehicle-mounted energy storage unit 3, the charging control unit 2 updates the charging condition of the charging control unit 2 based on the running state data of the vehicle-mounted energy storage unit 3 at the current moment, and the charging control unit 2 charges the vehicle-mounted energy storage unit 3 according to the updated charging condition.
Specifically, referring to fig. 6, after the tramcar arrives, the vehicle-mounted energy storage control module 31 determines whether the tramcar matches the charging condition according to the running state data at the current time, if the matching is successful, the vehicle-mounted energy storage control module 31 controls the contactor 33 electrically connected to the normal vehicle-mounted energy storage module 32 to be closed and starts to charge, if the matching is unsuccessful, the vehicle-mounted energy storage control module 31 sends a feedback signal to the charging control module 21, the charging control module 21 updates the charging condition, after a certain time (set to 5s in this embodiment), the matching condition of the charging condition is detected again until the matching condition of the charging condition is successful, and the vehicle-mounted energy storage control module 32 controls the energy storage contactor 33 electrically connected to the normal vehicle-mounted energy storage module 31 to be closed and charges. In this embodiment, through confirming the operating mode matching condition that charges before charging, can avoid tram at the in-process of entering the station, the change of on-vehicle energy storage unit 2 fault state leads to charging control unit 2 to fail in time to react to wrong charging condition charges on-vehicle energy storage module 32, causes harmful effects.
In this embodiment, the step S2 further includes:
in the charging process, when the vehicle-mounted energy storage unit 3 has a fault alarm signal, the fault grade of the vehicle-mounted energy storage unit 3 is determined based on the fault state data of the vehicle-mounted energy storage unit 3, the vehicle-mounted energy storage unit 3 is controlled to act to eliminate the alarm prompt based on the fault grade, and after the alarm prompt is eliminated, the charging control unit 2 continues to charge the vehicle-mounted energy storage unit until the charging is finished.
Specifically, with reference to fig. 6, when the charging conditions are successfully matched and the charging control unit 2 starts to charge the vehicle-mounted energy storage module 32, the vehicle-mounted energy storage control module 31 detects whether the power management module 34 has a fault alarm signal in real time, when the fault alarm signal exists, the fault level is determined based on the operating state data of the vehicle-mounted energy storage module 32, when the fault level is a primary fault or a secondary fault, the power management module 34 resets and outputs a corresponding control instruction to the vehicle-mounted energy storage control module 31, and determines whether the fault alarm signal is eliminated, if the fault alarm signal is eliminated, the charging is continued, and if the fault alarm signal is not eliminated, the vehicle-mounted energy storage control module 31 controls to remove the energy storage contactor 33 electrically connected with the vehicle-mounted energy storage module 32; when the fault grade is a three-level fault, the vehicle-mounted energy storage control module 31 controls to cut off the energy storage contactor 33 electrically connected with the vehicle-mounted energy storage module 32; after the energy storage contactor 33 electrically connected with the vehicle-mounted energy storage modules 32 is cut off, the vehicle-mounted energy storage control module 31 sends the running state data of the plurality of vehicle-mounted energy storage modules 32 to the charging control module 21, the charging control module 21 updates the charging working condition, and continues to charge according to the updated charging working condition until the total voltage of the vehicle-mounted energy storage unit 3 reaches the upper limit value, and the charging is finished.
S3: when the difference between the voltage value of the output end of the charging control unit 2 and the voltage value of the input end of the vehicle-mounted energy storage unit 3 is smaller than the third threshold, the charging control unit 2 stops charging the vehicle-mounted energy storage unit 3.
Specifically, the third threshold may be set according to actual needs, and in this embodiment, a specific value of the third threshold is not specifically limited in this embodiment.
The embodiment provides a tramcar control method, based on a tramcar charging system, the charging control unit and the vehicle-mounted energy storage unit are in communication connection through wireless communication, the charging working condition of the charging control unit is determined by acquiring the running state data of the vehicle-mounted energy storage unit before a train enters a station, and the tramcar is charged according to the charging working condition, so that the problems that the running state of the tramcar energy storage device cannot be mastered in time, the reliability is low and the safety is low in the prior art tramcar charging control method are solved, the tramcar can be charged under a reasonable charging working condition when the tramcar enters the station, the station-entering charging time of the tramcar is shortened, the secondary damage of unreasonable charging to the tramcar energy storage device is avoided, and the reliability and the safety are improved.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (4)
1. The tramcar charging control method is applied to a tramcar charging system, the tramcar charging system comprises a wireless communication unit, and a charging control unit and a vehicle-mounted energy storage unit which are in communication connection through the wireless communication unit, and the tramcar charging control method comprises the following steps:
s1: before the tramcar enters the station, the charging control unit acquires multiple groups of running state data of the vehicle-mounted energy storage unit at the current moment;
s2: setting a preset judgment condition, determining the charging working condition of the charging control unit based on a plurality of groups of running state data when the running state data meet the preset judgment condition, and charging the vehicle-mounted energy storage unit by the charging control unit according to the charging working condition after the tramcar enters the station;
wherein the operation state data in the step S1 includes: fault state data of the vehicle-mounted energy storage unit, electric quantity state data of the vehicle-mounted energy storage unit and parameter state data of the vehicle-mounted energy storage unit;
the preset determination condition in the step S2 specifically includes:
a first preset judgment condition and a second preset judgment condition;
the first preset judgment condition comprises: judging whether the difference value between a plurality of groups of the running state data at the current moment is smaller than a first preset threshold value, if so, continuing to perform the next step, otherwise, delaying for 2S and returning to the step S1;
the second preset judgment condition includes: judging whether the difference value between the multiple groups of running state data at the current moment and the multiple groups of running state data at the next moment is smaller than a second preset threshold value, if so, continuing to perform the next step, otherwise, returning to the step S1, wherein the number of the multiple groups of running state data is two;
in the step S2, the method further includes:
after the tramcar enters the station, the vehicle-mounted energy storage unit acquires the charging working condition of the charging control unit;
if the charging working condition of the charging control unit is successfully matched with the running state data of the vehicle-mounted energy storage unit, the charging control unit charges the vehicle-mounted energy storage unit according to the charging working condition;
if the charging condition of the charging control unit fails to be matched with the running state data of the vehicle-mounted energy storage unit, the charging control unit updates the charging condition of the charging control unit based on the running state data of the vehicle-mounted energy storage unit at the current moment, and the charging control unit charges the vehicle-mounted energy storage unit according to the updated charging condition;
in the step S2, the charging control unit charges the tramcar according to the charging condition, and specifically includes:
in the charging process, the charging control unit acquires the fault state data of the vehicle-mounted energy storage unit in real time;
if the fault state data at the current moment is inconsistent with the fault state data at the previous moment, updating the charging working condition of the charging control unit based on the running state data of the vehicle-mounted energy storage unit at the current moment;
the charging control unit charges the vehicle-mounted energy storage unit according to the updated charging working condition;
further comprising:
s0: dividing fault levels, acquiring the fault state data of the vehicle-mounted energy storage unit in real time before the tramcar enters a station, determining the fault level of the vehicle-mounted energy storage unit based on the fault state data if the vehicle-mounted energy storage unit with a fault exists, controlling the vehicle-mounted energy storage unit to act to eliminate the vehicle-mounted energy storage unit with the fault based on the fault level, and sending the running state data of the vehicle-mounted energy storage unit to the charging control unit;
the fault level in the step S0 includes: primary, secondary and tertiary faults;
when the first-level fault occurs, the power management module sends a first-level fault alarm signal and reports the first-level fault alarm signal to the vehicle-mounted energy storage control unit, if the first-level fault alarm signal still exists after a period of time, the vehicle-mounted energy storage control module controls to cut off an energy storage contactor electrically connected with the vehicle-mounted energy storage module with the fault, and after the power management module is reset, the vehicle-mounted energy storage control module with the fault elimination controls to close the contactor again; when a secondary fault occurs, the power management module sends a secondary fault alarm signal and judges the fault type at the same time, a corresponding control instruction is output according to the fault type and reported to the vehicle-mounted energy storage control unit, if the secondary fault alarm signal still exists after a period of time, the vehicle-mounted energy storage control module controls to cut off an energy storage contactor electrically connected with the fault vehicle-mounted energy storage module, and after the power management module is reset, the fault elimination vehicle-mounted energy storage control module controls to close the energy storage contactor again; and when the three-level fault occurs, immediately disconnecting the energy storage contactor electrically connected with the fault vehicle-mounted energy storage module, and closing the energy storage contactor again after the power management module is reset and the three-level fault alarm signal is eliminated.
2. The method for controlling charging of a railroad car according to claim 1, wherein the method for determining the charging condition of the charging control unit in the step S2 specifically includes:
the vehicle-mounted energy storage unit comprises a plurality of vehicle-mounted energy storage modules which are connected in parallel, and a plurality of charging gears of the charging control unit are determined based on the running state data of the plurality of vehicle-mounted energy storage modules.
3. The tram charging control method according to claim 1, further comprising:
s3: and when the difference value between the voltage value of the output end of the charging control unit and the voltage value of the input end of the vehicle-mounted energy storage unit is smaller than a third threshold value, the charging control unit stops charging the vehicle-mounted energy storage unit.
4. The tram charging control method according to claim 1, wherein the step S2 further comprises:
in the charging process, when the vehicle-mounted energy storage unit has a fault alarm signal, the fault grade of the vehicle-mounted energy storage unit is determined based on fault state data of the vehicle-mounted energy storage unit, the vehicle-mounted energy storage unit is controlled to act to eliminate the fault alarm signal based on the fault grade, and after the fault alarm signal is eliminated, the charging control unit continues to charge the vehicle-mounted energy storage unit until the charging is finished.
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| CN115817250B (en) * | 2023-02-20 | 2023-05-09 | 通号（长沙）轨道交通控制技术有限公司 | Tramcar ground charging control method, device, equipment and storage medium |
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