CN115675191B - Train-ground joint control energy management method, system, equipment and storage medium - Google Patents
Train-ground joint control energy management method, system, equipment and storage medium Download PDFInfo
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- CN115675191B CN115675191B CN202310005877.9A CN202310005877A CN115675191B CN 115675191 B CN115675191 B CN 115675191B CN 202310005877 A CN202310005877 A CN 202310005877A CN 115675191 B CN115675191 B CN 115675191B
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Abstract
The application discloses train-ground joint control energy management method, system, equipment and storage medium, which are applied to the technical field of rail transit and comprise the following steps: when the current platform is a front platform and a rear platform of the train, performing data interaction with the train; when train state information sent by a train is received, a platform terminal voltage change curve used for stabilizing the bus voltage of the train is updated based on the currently received train state information and the current distance between a platform and the train; the terminal voltage of the hybrid energy storage device of the platform is controlled based on the platform terminal voltage change curve, so that the change of the terminal voltage of the hybrid energy storage device conforms to the currently updated platform terminal voltage change curve.
Description
Technical Field
The invention relates to the technical field of rail transit, in particular to a vehicle-ground joint control energy management method, system, equipment and storage medium.
Background
The current train-ground joint control technology is developed around the specific communication technology related to train-ground joint control.
In some trains such as subways and urban rails, direct current is provided by the platform, so that the traction of the train is realized, and the platform also has an energy recovery function, namely when the train is braked, the bus voltage is raised due to the rotating energy of the motor, so that the resistance connected with the bus can be used for power consumption, and meanwhile, the bus energy can be fed back to the energy storage device of the platform.
In the current scheme, when a train is pulled, 2 platforms nearest to the train currently provide direct current electric energy, namely the 2 platforms in front of and behind the train provide direct current electric energy to the train, and the output end voltages of the 2 platforms are the same and are preset fixed values. Correspondingly, when the train brakes, the 2 platforms nearest to the train at present receive the energy fed back by the train to realize energy storage, and the output end voltages of the 2 platforms are also the same in the process and are all preset fixed values.
Adopt platform output terminal voltage to be the design of fixed value, though it is comparatively simple and convenient on the programming, but because the train travel in-process, with preceding, the distance of 2 platforms in back constantly changes, make under a lot of circumstances, required energy is provided by 1 platform when the train pulls, be unfavorable for in time consuming the electric energy of another platform storage, it is corresponding, the energy of repayment mainly flows into certain 1 platform during the train braking, be unfavorable for the energy storage of 1 platform in addition, just so just be unfavorable for the balanced flow of energy, can increase the power consumption loss of line loss and resistance, also be unfavorable for the life of guarantee platform. In addition, when the train adjusts the operating condition, for example, when the braking/traction level is increased, the fluctuation of the bus voltage is easy to occur, and the recovery can be realized in a long time.
In summary, how to effectively control the voltage at the output end of the platform, reduce energy loss and resistance power consumption loss, and ensure the stability of the bus voltage of the train is a technical problem that needs to be solved urgently by those skilled in the art at present.
Disclosure of Invention
The invention aims to provide a train-ground joint control energy management method, a train-ground joint control energy management system, train-ground joint control energy management equipment and a storage medium, so that the voltage of an output end of a platform can be effectively controlled, the energy loss and the resistance power consumption loss can be reduced, and the stability of the bus voltage of a train can be guaranteed.
In order to solve the technical problems, the invention provides the following technical scheme:
a train-ground joint control energy management method is applied to each station and comprises the following steps:
when the current platform is the platform closest to the train head in the direction of the train head or the platform closest to the train tail in the direction of the train tail, performing data interaction with the train;
when train state information sent by a train is received, a platform terminal voltage change curve used for stabilizing the bus voltage of the train is updated based on the currently received train state information and the current distance between a platform and the train;
and controlling the terminal voltage of the hybrid energy storage device of the station based on the station terminal voltage change curve so as to enable the change of the terminal voltage of the hybrid energy storage device to conform to the currently updated station terminal voltage change curve.
Preferably, the updating a platform terminal voltage variation curve for stabilizing a train bus voltage based on the currently received train state information and the current distance between the platform and the train comprises:
determining the current working condition of the train based on the currently received train state information;
when the determined current working condition of the train is a traction working condition, determining a distance curve for representing the time change of the distance between the platform and the train along with the time based on the train state information and the current distance between the platform and the trainS（t) Direct current of power transmission port of trainI dc And power demand curve of trainP in （t）；
According toU dc （t）=f 1 （S（t），I dc ，P in （t) Determine a platform terminal voltage variation curve for stabilizing the bus voltage of the trainU dc （t）；
When the determined current working condition of the train is a braking working condition, determining a distance curve for representing the time change of the distance between the platform and the train along with the time based on the train state information and the current distance between the platform and the trainS（t) Direct current of power transmission port of trainI dc And power release curve of trainP out （t）；
According toU dc （t）=f 2 （S（t），I dc ，P out （t) To determine a station terminal voltage variation curve for stabilizing the bus voltage of the trainU dc （t）；
Wherein the content of the first and second substances,f 1 in order to set the first function of the setting,f 2 to set a second function, in said first functionf 1 In (1),S（t) AndU dc （t) The light-emitting diode is in positive correlation,I dc andU dc （t) The light-emitting diode is in positive correlation,P in （t) AndU dc （t) Is in positive correlation; in the second functionf 2 In (1),S（t) AndU dc （t) The light-emitting diode is in positive correlation,I dc andU dc （t) The light-emitting diode is in positive correlation with the light-emitting diode,P out （t) AndU dc （t) Is in positive correlation;tfor the moment, every time the train state information transmitted by the train is received,t=0。
preferably, when the determined current working condition of the train is a traction working condition, a distance curve for representing the time-varying distance between the platform and the train is determined based on the train state information and the current distance between the platform and the trainS（t) The method comprises the following steps:
when the determined current working condition of the train is a traction working condition, determining a distance curve for representing the time-varying distance between the platform and the train based on the current distance between the platform and the train, the current speed, the traction level and the train load in the train state informationS（t）；
Correspondingly, when the determined current working condition of the train is the braking working condition, a distance curve for representing the time change of the distance between the platform and the train is determined based on the train state information and the current distance between the platform and the trainS（t) The method comprises the following steps:
when the determined current working condition of the train is a braking working condition, determining a distance curve for representing the time change of the distance between the platform and the train according to the current distance between the platform and the train, the current speed, the braking level and the train load in the train state informationS（t）。
Preferably, the train state information further includes a vehicle resistor energy consumption starting voltage value a;
accordingly, in accordance withU dc （t）=f 2 （S（t），I dc ，P out （t) Determine a platform terminal voltage variation curve for stabilizing the bus voltage of the trainU dc （t) Then, the method further comprises the following steps:
curve the terminal voltage of the stationU dc （t) Replacing the values of the energy consumption starting voltage value a of the vehicle-mounted resistor with a-b;
wherein b is a preset parameter value and b is more than or equal to 0.
Preferably, the controlling the terminal voltage of the hybrid energy storage device of the station based on the station terminal voltage variation curve so that the terminal voltage of the hybrid energy storage device changes according to the currently updated station terminal voltage variation curve includes:
when the train is in a traction working condition, controlling the terminal voltages of a power supply device and an energy absorption supply device in a hybrid energy storage device of a platform based on the platform terminal voltage change curve so as to enable the change of the terminal voltage of the power supply device and the change of the terminal voltage of the energy absorption supply device to accord with the currently updated platform terminal voltage change curve;
and when the train is in a braking working condition, controlling the terminal voltage of an energy absorption supply device in the hybrid energy storage device of the platform based on the platform terminal voltage change curve so as to enable the change of the terminal voltage of the energy absorption supply device to conform to the currently updated platform terminal voltage change curve.
Preferably, the method further comprises the following steps:
and counting and recording the total output electric energy and the total input electric energy of the hybrid energy storage device of the station in the first time period.
Preferably, the method further comprises the following steps:
and when the total output electric energy of the hybrid energy storage device of any station in the first time length exceeds a preset first range and/or the total input electric energy of the hybrid energy storage device of any station in the first time length exceeds a preset second range, outputting prompt information carrying the station number to a control center.
A train-ground joint control energy management system is applied to each station and comprises:
the data interaction module is used for performing data interaction with the train when the current platform is the platform closest to the train head in the direction of the train head or the platform closest to the train tail in the direction of the train tail;
the platform terminal voltage change curve updating module is used for updating a platform terminal voltage change curve used for stabilizing the bus voltage of the train based on the currently received train state information and the current distance between the platform and the train when the train state information sent by the train is received;
and the execution module is used for controlling the terminal voltage of the hybrid energy storage device of the station based on the station terminal voltage change curve so as to enable the change of the terminal voltage of the hybrid energy storage device to conform to the currently updated station terminal voltage change curve.
An integrated train-ground control energy management device, comprising:
a memory for storing a computer program;
a processor for executing the computer program to implement the steps of the method for managing energy of train-ground joint control as described above.
A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method for integrated train-ground energy management as set forth above.
By applying the technical scheme provided by the embodiment of the invention, the voltage of the output end of the platform is not a fixed value, but can be actively adjusted based on vehicle-ground joint control, so that reasonable supply and absorption of energy are realized.
Specifically, the train-ground joint control energy management method can be applied to each platform, when a certain 1 platform is the platform closest to the train head in the direction of the train head or the platform closest to the train tail in the direction of the train tail, it is indicated that the platform needs to perform energy interaction with the train at present, and the optimization of energy flow is guaranteed through train-ground joint control energy management. That is, in the process, the 2 stations at the front and the back of the train need to perform data interaction with the train. When a certain platform receives train state information sent by a train, the platform updates a platform terminal voltage change curve for stabilizing the bus voltage of the train based on the currently received train state information and the current distance between the platform and the train.
It can be seen that the determined platform terminal voltage change curve considers the difference of train states and the distance change caused by train running, in other words, the platform terminal voltage change curve is a curve for stabilizing the bus voltage of the train, so that the change of the platform terminal voltage is proper, namely the platform terminal voltage change curve has the effect of predicting the terminal voltage value required by a platform in the future, the optimization of energy flow is favorably realized, and when energy is supplied during traction or released during braking, the energy can be uniformly distributed between the front platform and the rear platform of the train, so that the energy loss and the resistance power consumption loss are favorably reduced. And because the bus voltage of the train is stabilized by actively adjusting the terminal voltage of the platform, the condition that the bus voltage can be recovered after long time fluctuation easily caused in the traditional scheme can not occur, namely the stability of the bus voltage of the train is ensured. Of course, after the platform terminal voltage change curve for stabilizing the bus voltage of the train is updated, the terminal voltage of the hybrid energy storage device at the platform can be controlled based on the platform terminal voltage change curve, so that the change of the terminal voltage of the hybrid energy storage device conforms to the currently updated platform terminal voltage change curve.
To sum up, this application can carry out the initiative control adjustment of platform output end voltage through train ground joint control energy management, is favorable to realizing the optimization that the energy flows, ensures the balanced distribution of energy between preceding, back platform, has reduced energy loss and the power consumption loss of resistance, has also ensured the stability of train bus voltage.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flowchart of an embodiment of a method for managing energy of train-ground joint control according to the present invention;
FIG. 2a is a schematic diagram of energy transfer under a train traction condition in accordance with one embodiment of the present invention;
FIG. 2b is a schematic diagram of energy transfer under a train braking condition in accordance with one embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a train-ground joint control energy management system according to the present invention;
fig. 4 is a schematic structural diagram of a vehicle-ground joint control energy management device according to the present invention.
Detailed Description
The core of the invention is to provide a train-ground joint control energy management method, which can actively control and adjust the voltage of the output end of the platform through train-ground joint control energy management, is beneficial to realizing optimization of energy flow, ensures balanced distribution of energy between a front platform and a rear platform, reduces energy loss and resistance power consumption loss, and also ensures the stability of the bus voltage of a train.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating an implementation of a vehicle-ground integrated control energy management method according to the present invention, where the vehicle-ground integrated control energy management method can be applied to each station, and includes the following steps:
step S101: and when the current platform is the platform closest to the train head in the direction of the train head or the platform closest to the train tail in the direction of the train tail, performing data interaction with the train.
In particular, the solution of the present application can be applied to each platform, but it is understood that only 2 platforms are needed to perform the solution of the present application at the same time, i.e. the current front and rear platforms of the train. In practical situations, a plurality of platforms are usually sequentially arranged on a line, for example, when a train currently drives away from the platform No. 5 and drives towards the platform No. 6 ahead, the platform No. 5 and the platform No. 6 are used to execute the scheme of the present application before the train reaches the platform No. 6.
In the following embodiments of the present application, and fig. 2a and 2b, the example of the station nos. 5 and 6 is described.
In this example, the train is currently moving away from the platform No. 5 and toward the platform No. 6 ahead. Therefore, the platform No. 5 is the closest platform to the train tail in the direction of the train tail, and the platform No. 6 is the closest platform to the train head in the direction of the train head, so that the platform No. 5 needs to perform data interaction with the train, and the platform No. 6 also needs to perform data interaction with the train.
Taking platform 6 as an example, the platform 6 needs to perform data interaction with the train from the time the train arrives at platform 5 until the train leaves platform 7. In practical application, the platform No. 6 may establish communication with a TCMS (Train Control and Management System) System of the Train at the time when the Train reaches the platform No. 5, or may already establish communication with the TCMS System of the Train when the Train is about to reach the platform No. 5, without affecting the implementation of the present invention, as long as the platform No. 6 can effectively perform data interaction with the Train when the scheme of the present application needs to be executed at the platform No. 6, thereby receiving Train state information.
It should be noted that, in the solution of the present application, the platform and the train perform data interaction, specifically, the train state information sent by the train to the platform is used, and in practical applications, the data interaction performed by the platform and the train may further include other contents, for example, the platform sends a train control instruction to the train to realize driving control, and the like, which is not described herein,
the train station and the train perform data interaction, and generally, a wireless communication mode is adopted, that is, a train-ground wireless communication device arranged in the station can realize wireless communication with a train-ground wireless communication device of a TCMS system of the train.
Step S102: and updating a platform terminal voltage change curve for stabilizing the bus voltage of the train based on the currently received train state information and the current distance between the platform and the train when the train state information sent by the train is received.
Taking the platform No. 5 and the platform No. 6 of the above example as an example, the platform No. 5 and the platform No. 6 can both receive the train state information sent by the train. In practical application, the train may periodically send train state information, and if the train has a situation such as a change in traction level, a change in traction condition to a braking condition, etc., the train may also immediately send the train state information, that is, the train may send the train state information to the platform in various specific triggering manners, which may be set and adjusted according to actual needs without affecting the implementation of the present invention.
When the platform receives the train state information sent by the train, the platform updates the terminal voltage change curve of the platform based on the currently received train state information and by combining the current distance between the platform and the train. The current distance between the platform and the train can be determined by ground equipment, for example, train position detection equipment arranged on the ground, or the current distance can be determined by the train and sent to the platform.
In the running process of the train, the train state information can be changed continuously, the distance between the platform and the train is also changed continuously, and both the current most suitable terminal voltage value of the platform can be changed, so that in the scheme of the application, the terminal voltage value of the platform at the current moment is determined not only based on the current train state information and the current distance between the platform and the train, but also 1 terminal voltage change curve of the platform is determined, so that when the platform does not receive new train state information, the terminal voltage of the platform can be actively and continuously adjusted according to the terminal voltage change curve of the platform, the terminal voltage of the platform is always the most suitable terminal voltage value at the current even if the train is in continuous operation, namely the terminal voltage change curve of the platform plays a role in predicting the terminal voltage value required by the platform in the future.
The specific algorithm design for determining the platform terminal voltage change curve can be set and adjusted according to actual needs based on the current train state information and the current distance between the platform and the train, and the determined platform terminal voltage change curve can be an appropriate curve as long as the bus voltage of the train can be effectively stabilized, so that the optimization of energy flow can be realized.
Step S103: and controlling the terminal voltage of the hybrid energy storage device of the station based on the station terminal voltage change curve so as to enable the change of the terminal voltage of the hybrid energy storage device to conform to the currently updated station terminal voltage change curve.
After the station platform updates the station platform voltage change curve each time, the station platform can control the terminal voltage of the hybrid energy storage device of the station platform based on the currently updated station platform voltage change curve, namely, the change of the terminal voltage of the hybrid energy storage device conforms to the currently updated station platform voltage change curve.
In performing the terminal voltage control of the hybrid energy storage device, it is generally implemented by controlling a bidirectional DC-DC device in the hybrid energy storage device.
Since the platform is usually provided with a power supply device and an energy absorption supply device, the former can supply power, and the latter can both supply power and store the electric energy released by the train, in an embodiment of the present invention, step S103 may specifically include:
when the train is in a traction working condition, the terminal voltages of a power supply device and an energy absorption supply device in a hybrid energy storage device of the platform are controlled based on the platform terminal voltage change curve, so that the change of the terminal voltage of the power supply device and the change of the terminal voltage of the energy absorption supply device both conform to the currently updated platform terminal voltage change curve;
when the train is in a braking working condition, the terminal voltage of an energy absorption supply device in the hybrid energy storage device of the platform is controlled based on the platform terminal voltage change curve, so that the change of the terminal voltage of the energy absorption supply device conforms to the currently updated platform terminal voltage change curve.
Referring to fig. 2a, which is a schematic diagram of energy transfer under a train traction condition, in fig. 2a, a power supply device and an energy absorption supply device are arranged in the hybrid energy storage device at the platform No. 5, which are respectively marked as a power supply device No. 5 51 and an energy absorption supply device No. 5 52, and at the same time, the terminal voltages of the power supply device No. 5 and the energy absorption supply device No. 5 are consistent, and the changes of the terminal voltages of the power supply device No. 5 and the energy absorption supply device No. 5 both conform to the currently updated terminal voltage change curve at the platform No. 5.
Similarly, in fig. 2a, the hybrid energy storage device at station No. 6 is also provided with a power supply device and an energy absorption supply device, which are respectively labeled as power supply device No. 6 61 and energy absorption supply device No. 6 62, at the same time, the terminal voltages of power supply device No. 6 and energy absorption supply device No. 6 are consistent, and the changes of the terminal voltages of both power supply device No. 6 and energy absorption supply device No. 6 both conform to the station terminal voltage variation curve currently updated by station No. 6.
Due to the adoption of the scheme, the energy supply of the No. 5 platform and the No. 6 platform is basically consistent, the optimization of energy flow is facilitated, the energy loss and the resistance power consumption loss are reduced, and the stability of the bus voltage of the train is also guaranteed.
Fig. 2b is a schematic diagram of energy transfer during a braking mode of the train, wherein the energy released by the train can be transferred to the 5 th and 6 th energy-absorbing supplies 52, 62 for energy storage. When the train releases energy, the energy distributed to the platform 5 and the platform 6 is basically consistent, and optimization of energy flow is facilitated.
In an embodiment of the present invention, the updating of the platform terminal voltage variation curve for stabilizing the train bus voltage based on the currently received train state information and the current distance between the platform and the train described in step S102 may specifically include:
determining the current working condition of the train based on the currently received train state information;
when the determined current working condition of the train is a traction working condition, determining a distance curve for representing the time change of the distance between the platform and the train according to the train state information and the current distance between the platform and the trainS（t) Direct current of power transmission port of trainI dc And power demand curve of trainP in （t）；
According toU dc （t）=f 1 （S（t），I dc ，P in （t) For determinationStation terminal voltage change curve for stabilizing train bus voltageU dc （t）；
When the determined current working condition of the train is a braking working condition, determining a distance curve for representing the time change of the distance between the platform and the train according to the train state information and the current distance between the platform and the trainS（t) Direct current of power transmission port of trainI dc And power release curve of trainP out （t）；
According toU dc （t）=f 2 （S（t），I dc ，P out （t) Determine a platform terminal voltage variation curve for stabilizing the bus voltage of the trainU dc （t）；
Wherein the content of the first and second substances,f 1 in order to set the first function of the setting,f 2 for setting the second function, in the first functionf 1 In (1),S（t) AndU dc （t) The light-emitting diode is in positive correlation,I dc and withU dc （t) The light-emitting diode is in positive correlation,P in （t) AndU dc （t) Is in positive correlation; in a second functionf 2 In (1),S（t) AndU dc （t) The light-emitting diode is in positive correlation,I dc andU dc （t) The light-emitting diode is in positive correlation,P out （t) And withU dc （t) Is in positive correlation;tfor the moment, every time the train state information transmitted by the train is received,t=0。
taking the traction condition as an example, the farther the platform is from the train, the larger the equivalent impedance of the transmission line is, so to ensure the stability of the bus voltage of the train, the higher the platform terminal voltage should be, that is, in the first functionf 1 In, independent variableS（t) And dependent variableU dc （t) The relationship is positive, in the above example, when the train drives from the platform No. 5 to the platform No. 6, the terminal voltage at the platform No. 5 should gradually increase as the distance between the platform No. 5 and the train is longer and longer, and correspondingly, the terminal voltage at the platform No. 6 should gradually decrease as the distance between the platform No. 6 and the train is shorter and shorter.
Direct current of train power transmission portI dc The larger the required station terminal voltage, and thus, the first functionf 1 In, independent variableI dc And dependent variableU dc （t) There is also a positive correlation between them.
Power demand curve of trainP in （t) The current power demand and the subsequent power demand of the train can be effectively reflected, and the larger the power demand of the train is, the higher the required station terminal voltage is, therefore, the first functionf 1 In, independent variableP in （t) And dependent variableU dc （t) There is also a positive correlation between them.
Determining a distance curve representing the time variation of the distance between the platform itself and the trainS（t) In the time, not only the distance between the platform and the train at the current time but also the train state information need to be considered, for example, the information such as the current speed of the train, whether the train is running at a constant speed or not, and the specific acceleration if the train is running at an accelerated speed can be determined through the train state information, and the distance curve representing the change of the distance between the platform and the train with time can be determined based on the train state information and the distance between the platform and the train with the combination of the current distance between the platform and the trainS（t) And (4) finishing.
Direct current of train power transmission portI dc And power demand curve of trainP in （t) (ii) a Can usually be determined by the train itself and sent to the platform by train-to-ground communication, i.e.I dc AndP in （t) May be included in the train status information. Of course, in some cases, the heat-insulating material may be made ofThe platform equipment automatically carries out the power demand curve of the train based on the related parameters in the train state informationP in （t) Does not affect the practice of the invention.
tIt indicates the time, when the train state information sent by the train is received,t=0. For example, when the No. 5 platform receives the train state information under the traction condition sent by the train at a certain time, at the current moment, the information is sent according toU dc （0）=f 1 （S（0），I dc ，P in （0) Determined by)U dc （0) The terminal voltage value is the most ideal terminal voltage value of the station No. 5 at the current moment, and the terminal voltage value of the station No. 5 needs to be immediately controlled to beU dc （0). And the subsequent voltage variation curve is based on the station terminal voltageU dc （t) And actively adjusting the terminal voltage value. And when the train state information transmitted by the train is received again,treturn to 0 and update the new station terminal voltage curveU dc （t) The principle is the same as above.
The above description is for the example of traction condition, and the principle of brake condition is the same, but since the train bus releases energy at this time, the second functionf 2 The independent variable in (A) isP out （t），P out （t) As power release curvesP out （t) The larger the value, the higher the required station terminal voltage, and thus, in the second functionf 2 InP out （t) AndU dc （t) Is in positive correlation.
First functionf 1 And a second functionf 2 The specific form of the present invention can be set according to actual needs, but it should be understood that the above definitions should be met. Furthermore, in practical applications, the first functionf 1 And a second functionf 2 Is generally consistent in functional formThe method is beneficial to facilitating program design, but values of parameters specifically adopted in the function form can be different.
In an embodiment of the present invention, when the determined current working condition of the train is a traction working condition, a distance curve indicating a time-dependent change in a distance between the platform itself and the train is determined based on the train state information and a current distance between the platform itself and the trainS（t) The method comprises the following steps:
when the determined current working condition of the train is a traction working condition, determining a distance curve for representing the time-varying distance between the platform and the train based on the current distance between the platform and the train, the current speed, the traction level and the train load in the train state informationS（t）；
Correspondingly, when the determined current working condition of the train is the braking working condition, a distance curve for representing the time change of the distance between the platform and the train is determined based on the train state information and the current distance between the platform and the trainS（t) The method comprises the following steps:
when the determined current working condition of the train is a braking working condition, determining a distance curve for representing the time-varying distance between the platform and the train based on the current distance between the platform and the train, the current speed, the braking level and the train load in the train state informationS（t）。
Under normal conditions, based on the distance between the platform and the train, the distance curve can be effectively determined by combining the current speed of the train and the traction level/braking level carried in the train state informationS（t). In this embodiment, however, a distance curve is determinedS（t) The influence of train load is also considered, and the determined distance curve is favorably improvedS（t) The accuracy of the method is beneficial to obtaining more accurate and reasonable station terminal voltage change curveU dc （t）。
In a specific embodiment of the present invention, the train state information may further include a vehicle resistor energy consumption starting voltage value a;
accordingly, is in accordance withU dc （t）=f 2 （S（t），I dc ，P out （t) Determine a platform terminal voltage variation curve for stabilizing the bus voltage of the trainU dc （t) Then, the method further comprises the following steps:
curve of terminal voltage change of stationU dc （t) Replacing the numerical values which are larger than the energy consumption starting voltage value a of the vehicle resistor with a-b;
wherein b is a preset parameter value and b is more than or equal to 0.
This embodiment further considers that, during train braking, in addition to the absorption of the bus released energy by the energy storage device at the platform, the train itself is usually provided with a vehicle resistor to consume the bus released energy, so as to avoid the damage to the circuit device due to the overvoltage of the bus voltage. The on-board resistor is shown in fig. 2 b.
The vehicle resistor consumes energy and starts a voltage value a, which indicates that when the bus voltage is higher than a, the vehicle resistor is started to consume the electric energy of the bus voltage so as to avoid the overvoltage of the bus voltage. Therefore, in this embodiment, it is considered that the energy released when the train should be preferentially braked is stored in the platform equipment, not consumed by the on-board resistor, and therefore, if based on thisU dc （t）=f 2 （S（t），I dc ，P out （t) Station terminal voltage change curve determined to stabilize the bus voltage of the trainU dc （t) In (b), values greater than a should be reduced. The specific way to achieve the value reduction in this embodiment is to replace it with a-b, since b ≧ 0, the reduced value will not exceed a. Of course, considering the existence of the line impedance, b is usually set to be greater than 0, and the specific value can be set and adjusted according to the actual situation.
In an embodiment of the present invention, the method may further include:
and counting and recording the total input electric energy and the total output electric energy of the hybrid energy storage device of the station in the first time period.
The embodiment considers that the optimal flow of energy can be realized, the balance of energy supply among all the platforms is also facilitated to be guaranteed, and the balance of energy receiving is facilitated, so that for each platform, the total input electric energy and the total output electric energy of the hybrid energy storage device of the platform can be counted and recorded within a first time period, and follow-up workers can use historical data to realize analysis. For example, if the total input power of a hybrid energy storage device during the first time period is often too high, it indicates that the related hardware circuit or software program of the station may be abnormal, and the staff may perform troubleshooting.
Further, in an embodiment of the present invention, the method may further include:
and when the total output electric energy of the hybrid energy storage device of any station in the first time length exceeds a preset first range and/or the total input electric energy of the hybrid energy storage device of any station in the first time length exceeds a preset second range, outputting prompt information carrying the station number to a control center.
In the embodiment, if the total output electric energy of the hybrid energy storage device of a certain platform in the first time length exceeds the preset first range and/or the total input electric energy exceeds the preset second range, it is considered that a more obvious abnormality occurs and a fault condition may exist, and therefore, the prompt information carrying the platform number can be directly output to the control center, so that related workers can timely handle the abnormal condition, and the abnormal expansion is favorably avoided. The specific numerical settings of the first range and the second range may be set according to actual conditions.
By applying the technical scheme provided by the embodiment of the invention, the voltage of the output end of the platform is not a fixed value, but can be actively adjusted based on vehicle-ground joint control, so that reasonable supply and absorption of energy are realized.
Specifically, the train-ground joint control energy management method can be applied to each platform, when a certain 1 platform is the platform closest to the train head in the direction of the train head or the platform closest to the train tail in the direction of the train tail, it is indicated that the platform needs to perform energy interaction with the train at present, and the optimization of energy flow is guaranteed through train-ground joint control energy management. That is, in the process, the 2 stations at the front and the back of the train need to perform data interaction with the train. When a certain platform receives train state information sent by a train, the platform updates a platform terminal voltage change curve for stabilizing the bus voltage of the train based on the currently received train state information and the current distance between the platform and the train.
It can be seen that the determined platform terminal voltage change curve considers the difference of train states and the distance change caused by train running, in other words, the platform terminal voltage change curve is a curve for stabilizing the bus voltage of the train, so that the change of the platform terminal voltage is proper, namely the platform terminal voltage change curve has the effect of predicting the terminal voltage value required by a platform in the future, the optimization of energy flow is favorably realized, and when energy is supplied during traction or released during braking, the energy can be uniformly distributed between the front platform and the rear platform of the train, so that the energy loss and the resistance power consumption loss are favorably reduced. And because the train bus voltage is stabilized by actively adjusting the terminal voltage of the platform, the condition that the fluctuation of the bus voltage can be easily recovered for a long time in the traditional scheme can not occur, namely the stability of the train bus voltage is ensured. Of course, after the platform terminal voltage change curve for stabilizing the bus voltage of the train is updated, the terminal voltage of the hybrid energy storage device at the platform can be controlled based on the platform terminal voltage change curve, so that the change of the terminal voltage of the hybrid energy storage device conforms to the currently updated platform terminal voltage change curve.
To sum up, this application can carry out the initiative control adjustment of platform output end voltage through train ground joint control energy management, is favorable to realizing the optimization that the energy flows, ensures the balanced distribution of energy between preceding, back platform, has reduced energy loss and the power consumption loss of resistance, has also ensured the stability of train bus voltage.
Corresponding to the above method embodiment, the embodiment of the present invention further provides a train-ground joint control energy management system, which can be referred to in correspondence with the above.
Referring to fig. 3, a schematic structural diagram of a train-ground joint control energy management system according to the present invention is applied to each station, and includes:
the data interaction module 301 is configured to perform data interaction with the train when the current platform is a platform closest to the train head in the direction of the train head or a platform closest to the train tail in the direction of the train tail;
a platform terminal voltage change curve updating module 302, configured to update a platform terminal voltage change curve for stabilizing a bus voltage of a train based on currently received train state information and a current distance between a platform and the train when train state information sent by the train is received;
the executing module 303 is configured to control the terminal voltage of the hybrid energy storage device of the station based on the station terminal voltage variation curve, so that the variation of the terminal voltage of the hybrid energy storage device conforms to the currently updated station terminal voltage variation curve.
In an embodiment of the present invention, the station terminal voltage variation curve updating module 302 is specifically configured to:
when train state information sent by a train is received, determining the current working condition of the train based on the currently received train state information;
when the determined current working condition of the train is a traction working condition, determining a distance curve for representing the time change of the distance between the platform and the train according to the train state information and the current distance between the platform and the trainS（t) Direct current of power transmission port of trainI dc And power demand curve of trainP in （t）；
According toU dc （t）=f 1 （S（t），I dc ，P in （t) Determine a platform terminal voltage variation curve for stabilizing the bus voltage of the trainU dc （t）；
When the determined current working condition of the train is a braking working condition, determining a distance curve for representing the time-varying distance between the platform and the train on the basis of the train state information and the current distance between the platform and the trainS（t) Direct current of power transmission port of trainI dc And power release curve of trainP out （t）；
According toU dc （t）=f 2 （S（t），I dc ，P out （t) Determine a platform terminal voltage variation curve for stabilizing the bus voltage of the trainU dc （t）；
Wherein the content of the first and second substances,f 1 in order to set the first function of the setting,f 2 for setting the second function, in the first functionf 1 In (1),S（t) And withU dc （t) The light-emitting diode is in positive correlation,I dc andU dc （t) The light-emitting diode is in positive correlation,P in （t) AndU dc （t) Is in positive correlation; in a second functionf 2 In (1),S（t) AndU dc （t) The light-emitting diode is in positive correlation,I dc andU dc （t) The light-emitting diode is in positive correlation,P out （t) AndU dc （t) Is in positive correlation;tfor the moment, every time the train state information transmitted by the train is received,t=0。
in an embodiment of the present invention, when the determined current working condition of the train is a traction working condition, a distance indicating that the distance between the platform itself and the train changes with time is determined based on the train state information and the current distance between the platform itself and the trainOff curveS（t) The method comprises the following steps:
when the determined current working condition of the train is a traction working condition, determining a distance curve for representing the time-varying distance between the platform and the train based on the current distance between the platform and the train, the current speed, the traction level and the train load in the train state informationS（t）；
Correspondingly, when the determined current working condition of the train is the braking working condition, a distance curve for representing the time change of the distance between the platform and the train is determined based on the train state information and the current distance between the platform and the trainS（t) The method comprises the following steps:
when the determined current working condition of the train is a braking working condition, determining a distance curve for representing the time-varying distance between the platform and the train based on the current distance between the platform and the train, the current speed, the braking level and the train load in the train state informationS（t）。
In a specific embodiment of the invention, the train state information further includes a vehicle resistor energy consumption starting voltage value a;
accordingly, the station terminal voltage curve updating module 302 is based onU dc （t）=f 2 （S（t），I dc ，P out （t) To determine a station terminal voltage variation curve for stabilizing the bus voltage of the trainU dc （t) Thereafter, also for:
curve of terminal voltage change of stationU dc （t) Replacing the numerical values which are larger than the energy consumption starting voltage value a of the vehicle resistor with a-b;
wherein b is a preset parameter value and b is more than or equal to 0.
In an embodiment of the present invention, the executing module 303 is specifically configured to:
when the train is in a traction working condition, the terminal voltages of a power supply device and an energy absorption supply device in a hybrid energy storage device of the platform are controlled based on the platform terminal voltage change curve, so that the change of the terminal voltage of the power supply device and the change of the terminal voltage of the energy absorption supply device both conform to the currently updated platform terminal voltage change curve;
when the train is in a braking working condition, the terminal voltage of an energy absorption supply device in the hybrid energy storage device of the platform is controlled based on the platform terminal voltage change curve, so that the change of the terminal voltage of the energy absorption supply device conforms to the currently updated platform terminal voltage change curve.
In a specific embodiment of the present invention, the system further includes a statistical recording module, configured to:
and counting and recording the total output electric energy and the total input electric energy of the hybrid energy storage device of the station in the first time period.
In an embodiment of the present invention, the statistical recording module is further configured to:
and when the total output electric energy of the hybrid energy storage device of any station in the first time length exceeds a preset first range and/or the total input electric energy of the hybrid energy storage device of any station in the first time length exceeds a preset second range, outputting prompt information carrying the station number to a control center.
Corresponding to the above method and system embodiments, the embodiment of the present invention further provides a train-ground joint control energy management device and a computer readable storage medium, which may be referred to in correspondence with the above.
Referring to fig. 4, the integrated vehicle-ground control energy management device may include:
a memory 401 for storing a computer program;
a processor 402 for executing a computer program for implementing the steps of the method for integrated ground control energy management as described in any of the above embodiments.
The computer readable storage medium has stored thereon a computer program, which when executed by a processor implements the steps of the method for vehicle-ground joint control energy management as in any of the above embodiments. A computer-readable storage medium as referred to herein may include Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
It is further noted that, herein, relational terms such as first and second, and the like may be 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. Also, 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 phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
Those of skill would further appreciate that the various illustrative components 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 components and steps of the various examples have been described above generally in terms of their functionality in order to clearly illustrate this 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 implementation. 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 principle and the implementation of the present invention are explained in the present application by using specific examples, and the above description of the embodiments is only used to help understanding the technical solution and the core idea of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall into the protection scope of the present invention.
Claims (9)
1. A vehicle-ground joint control energy management method is applied to each station and comprises the following steps:
when the current platform is the platform closest to the train head in the direction of the train head or the platform closest to the train tail in the direction of the train tail, performing data interaction with the train;
when train state information sent by a train is received, a platform terminal voltage change curve used for stabilizing the bus voltage of the train is updated based on the currently received train state information and the current distance between a platform and the train;
controlling the terminal voltage of a hybrid energy storage device of the station based on the station terminal voltage change curve so as to enable the change of the terminal voltage of the hybrid energy storage device to conform to the currently updated station terminal voltage change curve;
the updating of the platform terminal voltage change curve for stabilizing the train bus voltage based on the currently received train state information and the current distance between the platform and the train comprises:
determining the current working condition of the train based on the currently received train state information;
when the determined current working condition of the train is a traction working condition, determining a distance curve for representing the time change of the distance between the platform and the train along with the time based on the train state information and the current distance between the platform and the trainS（t) Direct current of power transmission port of trainI dc And power demand curve of trainP in （t）；
According toU dc （t）=f 1 （S（t），I dc ，P in （t) Determine a platform terminal voltage variation curve for stabilizing the bus voltage of the trainU dc （t）；
When the determined current working condition of the train is a braking working condition, the method is based onThe train state information and the current distance between the platform and the train determine a distance curve which is used for representing the change of the distance between the platform and the train along with the timeS（t) Direct current of power transmission port of trainI dc And power release curve of trainP out （t）；
According toU dc （t）=f 2 （S（t），I dc ，P out （t) Determine a platform terminal voltage variation curve for stabilizing the bus voltage of the trainU dc （t）；
Wherein the content of the first and second substances,f 1 in order to set the first function of the first function,f 2 for a set second function, in said first functionf 1 In (1),S（t) AndU dc （t) The light-emitting diode is in positive correlation,I dc andU dc （t) The light-emitting diode is in positive correlation,P in （t) AndU dc （t) Is in positive correlation; in the second functionf 2 In (1),S（t) AndU dc （t) The light-emitting diode is in positive correlation,I dc andU dc （t) The light-emitting diode is in positive correlation,P out （t) AndU dc （t) Is in positive correlation;tfor the moment, every time the train state information transmitted by the train is received,t=0。
2. the train-ground joint control energy management method according to claim 1, wherein when the determined current working condition of the train is a traction working condition, a distance curve representing the time-dependent change of the distance between the platform and the train is determined based on the train state information and the current distance between the platform and the trainS（t) The method comprises the following steps:
when the determined current working condition of the train is a traction working condition, the current working condition is based on the platformThe distance between the platform and the train, the current speed, the traction level and the train load in the train state information determine a distance curve which is used for representing the time variation of the distance between the platform and the trainS（t）；
Correspondingly, when the determined current working condition of the train is the braking working condition, a distance curve for representing the time change of the distance between the platform and the train is determined based on the train state information and the current distance between the platform and the trainS（t) The method comprises the following steps:
when the determined current working condition of the train is a braking working condition, determining a distance curve for representing the time-varying distance between the platform and the train based on the current distance between the platform and the train, the current speed, the braking level and the train load in the train state informationS（t）。
3. The train-ground joint control energy management method according to claim 1, wherein the train state information further includes a vehicle-mounted resistor energy consumption starting voltage value a;
accordingly, in accordance withU dc （t）=f 2 （S（t），I dc ，P out （t) To determine a station terminal voltage variation curve for stabilizing the bus voltage of the trainU dc （t) Then, the method also comprises the following steps:
curve the terminal voltage of the stationU dc （t) Replacing the values of the energy consumption starting voltage value a of the vehicle-mounted resistor with a-b;
wherein b is a preset parameter value and b is more than or equal to 0.
4. The method as claimed in claim 1, wherein the controlling the terminal voltages of the hybrid energy storage devices at the station based on the station terminal voltage variation curve to make the variation of the terminal voltages of the hybrid energy storage devices conform to the currently updated station terminal voltage variation curve comprises:
when the train is in a traction working condition, controlling the terminal voltages of a power supply device and an energy absorption supply device in a hybrid energy storage device of a platform based on the platform terminal voltage change curve so as to enable the change of the terminal voltage of the power supply device and the change of the terminal voltage of the energy absorption supply device to accord with the currently updated platform terminal voltage change curve;
and when the train is in a braking working condition, controlling the terminal voltage of an energy absorption supply device in the hybrid energy storage device of the platform based on the platform terminal voltage change curve so as to enable the change of the terminal voltage of the energy absorption supply device to accord with the currently updated platform terminal voltage change curve.
5. The vehicle-ground joint control energy management method according to any one of claims 1 to 4, characterized by further comprising:
and counting and recording the total output electric energy and the total input electric energy of the hybrid energy storage device of the station in the first time period.
6. The vehicle-ground joint control energy management method according to claim 5, further comprising:
and when the total output electric energy of the hybrid energy storage device of any station in the first time length exceeds a preset first range and/or the total input electric energy of the hybrid energy storage device of any station in the first time length exceeds a preset second range, outputting prompt information carrying the station number to a control center.
7. A train-ground joint control energy management system is applied to each station and comprises:
the data interaction module is used for performing data interaction with the train when the current platform is the platform closest to the train head in the direction of the train head or the platform closest to the train tail in the direction of the train tail;
the platform terminal voltage change curve updating module is used for updating a platform terminal voltage change curve used for stabilizing the bus voltage of the train based on the currently received train state information and the current distance between the platform and the train when the train state information sent by the train is received;
the execution module is used for controlling the terminal voltage of a hybrid energy storage device of the station based on the station terminal voltage change curve so as to enable the change of the terminal voltage of the hybrid energy storage device to conform to the currently updated station terminal voltage change curve;
the updating of the platform terminal voltage change curve for stabilizing the train bus voltage based on the currently received train state information and the current distance between the platform and the train comprises:
determining the current working condition of the train based on the currently received train state information;
when the determined current working condition of the train is a traction working condition, determining a distance curve for representing the time-varying distance between the platform and the train based on the train state information and the current distance between the platform and the trainS（t) Direct current of power transmission port of trainI dc And power demand curve of trainP in （t）；
According toU dc （t）=f 1 （S（t），I dc ，P in （t) Determine a platform terminal voltage variation curve for stabilizing the bus voltage of the trainU dc （t）；
When the determined current working condition of the train is a braking working condition, determining a distance curve for representing the time change of the distance between the platform and the train along with the time based on the train state information and the current distance between the platform and the trainS（t) Direct current of power transmission port of trainI dc And power release curve of trainP out （t）；
According toU dc （t）=f 2 （S（t），I dc ，P out （t) Determine a platform terminal voltage variation curve for stabilizing the bus voltage of the trainU dc （t）；
Wherein the content of the first and second substances,f 1 in order to set the first function of the setting,f 2 to set a second function, in said first functionf 1 In (1),S（t) AndU dc （t) The light-emitting diode is in positive correlation,I dc andU dc （t) The light-emitting diode is in positive correlation,P in （t) And withU dc （t) Is in positive correlation; in the second functionf 2 In (1),S（t) AndU dc （t) The light-emitting diode is in positive correlation,I dc andU dc （t) The light-emitting diode is in positive correlation with the light-emitting diode,P out （t) AndU dc （t) Is in positive correlation;tfor the moment, every time the train state information transmitted by the train is received,t=0。
8. an integrated train-ground control energy management device, comprising:
a memory for storing a computer program;
a processor for executing the computer program to implement the steps of the method for integrated train-ground energy management according to any of claims 1 to 6.
9. A computer-readable storage medium, characterized in that a computer program is stored thereon, which, when being executed by a processor, carries out the steps of the method for jointly controlling energy with a vehicle and a ground as claimed in any one of claims 1 to 6.
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