CN115085178A - Control method and device of flywheel energy storage device, terminal and readable storage medium - Google Patents
Control method and device of flywheel energy storage device, terminal and readable storage medium Download PDFInfo
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- CN115085178A CN115085178A CN202211009300.7A CN202211009300A CN115085178A CN 115085178 A CN115085178 A CN 115085178A CN 202211009300 A CN202211009300 A CN 202211009300A CN 115085178 A CN115085178 A CN 115085178A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/14—Balancing the load in a network
- H02J1/16—Balancing the load in a network using dynamo-electric machines coupled to flywheels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M3/00—Feeding power to supply lines in contact with collector on vehicles; Arrangements for consuming regenerative power
- B60M3/06—Arrangements for consuming regenerative power
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J15/00—Systems for storing electric energy
- H02J15/007—Systems for storing electric energy involving storage in the form of mechanical energy, e.g. fly-wheels
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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Abstract
The application provides a control method, a control device, a control terminal and a readable storage medium of a flywheel energy storage device, wherein the control method comprises the following steps: determining the working mode of the flywheel energy storage device according to the direct-current bus electric signal of the traction network and the steel rail potential; under the energy-saving mode, the flywheel energy storage device is controlled to work according to the magnitude of the direct-current bus electric signal; under the voltage supporting mode or the voltage stabilizing mode, controlling the flywheel energy storage device to work according to the residual electric quantity of the flywheel energy storage device; under the steel rail potential mode, the flywheel energy storage device is controlled to work according to the line working condition of the traction network; in the emergency power supply mode, the energy required for pulling the target vehicle to the nearest platform is calculated, and the flywheel energy storage device is controlled to work based on the energy. By the method, the problems of regenerative braking energy recovery, overhigh traction net voltage, overlow traction net voltage, serious steel rail potential and the like can be considered, so that stable operation of the traction net is ensured.
Description
Technical Field
The present application relates to the field of rail transit technologies, and in particular, to a method and an apparatus for controlling a flywheel energy storage device, a terminal, and a readable storage medium.
Background
Urban rail transit is used as an electric energy-driven, fast and convenient public trip mode, and plays an important role in improving the environment and relieving traffic jam. The current application of the flywheel energy storage device in urban rail transit is mainly to recycle the regenerative braking energy generated by a train. However, different subway lines have different main problems, and the lines may have the problems that the operation safety is endangered due to overhigh traction network voltage, overlow traction network voltage, serious rail potential and the like, and the existing flywheel energy storage device has poor capacity of considering the various line problems.
Disclosure of Invention
The application provides a control method, a control device, a control terminal and a readable storage medium of a flywheel energy storage device, and aims to solve the problem that the existing flywheel energy storage device has poor capacity of considering the problems of overhigh traction network voltage, overlow traction network voltage, serious steel rail potential and the like.
In a first aspect, the present application provides a method for controlling a flywheel energy storage device, including:
determining the working mode of the flywheel energy storage device according to the direct-current bus electric signal of the traction network and the steel rail potential; the working modes comprise an energy-saving mode, a voltage supporting mode, a steel rail potential mode, a voltage stabilizing mode and an emergency power supply mode;
under the energy-saving mode, the flywheel energy storage device is controlled to work according to the magnitude of the direct current bus electric signal;
under the voltage supporting mode or the voltage stabilizing mode, controlling the flywheel energy storage device to work according to the residual electric quantity of the flywheel energy storage device;
under the steel rail potential mode, controlling the flywheel energy storage device to work according to the line working condition of the traction network;
under the emergency power supply mode, calculating energy required for towing a target vehicle to a platform nearest to the target vehicle, and controlling the flywheel energy storage device to work based on the energy; the target vehicle is any vehicle on the route.
In a second aspect, the present application provides a control apparatus for a flywheel energy storage device, comprising:
the mode judgment module is used for determining the working mode of the flywheel energy storage device according to the direct-current bus electric signal of the traction network and the steel rail potential; the working modes comprise an energy-saving mode, a voltage supporting mode, a steel rail potential mode, a voltage stabilizing mode and an emergency power supply mode;
the energy-saving mode control module is used for controlling the flywheel energy storage device to work according to the magnitude of the direct-current bus electric signal in the energy-saving mode;
the hybrid control module is used for controlling the flywheel energy storage device to work according to the residual electric quantity of the flywheel energy storage device in the voltage supporting mode or the voltage stabilizing mode;
the steel rail potential mode control module is used for controlling the flywheel energy storage device to work according to the line working condition of the traction network in the steel rail potential mode;
the emergency mode control module is used for calculating energy required for towing a target vehicle to a platform nearest to the target vehicle in the emergency power supply mode and controlling the flywheel energy storage device to work based on the energy; the target vehicle is any vehicle on the route.
In a third aspect, the present application provides a terminal, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the computer program to implement the steps of the method according to any one of the possible implementation manners of the first aspect.
In a fourth aspect, the present application provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the computer program implements the steps of the method according to any one of the possible implementation manners of the first aspect.
The embodiment of the application provides a control method of a flywheel energy storage device, which comprises the following steps of firstly determining a working mode of the flywheel energy storage device according to a direct-current bus electric signal of a traction network and a steel rail potential; the working modes comprise an energy-saving mode, a voltage supporting mode, a steel rail potential mode, a voltage stabilizing mode and an emergency power supply mode; in the energy-saving mode, the flywheel energy storage device is controlled to work according to the magnitude of the direct current bus electric signal; under the voltage supporting mode or the voltage stabilizing mode, controlling the flywheel energy storage device to work according to the residual electric quantity of the flywheel energy storage device; under the steel rail potential mode, controlling the flywheel energy storage device to work according to the line working condition of the traction network; under the emergency power supply mode, calculating energy required for towing the target vehicle to a platform nearest to the target vehicle, and controlling the flywheel energy storage device to work based on the energy; the target vehicle is any vehicle on the route. By the method, the problems of regenerative braking energy recovery, overhigh traction net voltage, overlow traction net voltage, serious steel rail potential and the like can be solved through the flywheel energy storage device, so that stable operation of the traction net is ensured.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is an application scenario diagram of a control method of a flywheel energy storage device according to an embodiment of the present application;
FIG. 2 is a flowchart illustrating an implementation of a method for controlling a flywheel energy storage device according to an embodiment of the present disclosure;
FIG. 3 is a schematic structural diagram of a control device of a flywheel energy storage device according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of a terminal provided in an embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
To make the objects, technical solutions and advantages of the present application more clear, the following description is made by way of specific embodiments with reference to the accompanying drawings.
Fig. 1 is an application scenario diagram of a control method of a flywheel energy storage device according to an embodiment of the present application. As shown in fig. 1, the output end of the flywheel energy storage device is connected with a direct current bus (DC +750/1500V bus) of a traction network sequentially through a drive cabinet, a line inlet cabinet (QS 1, QS2, QS 3) and a breaker QF 1; and one end of the drive cabinet connected with the incoming line cabinet is connected with a 400V low-voltage system through an isolating switch (QS 4, QS5 and QS 6), a breaker QF2 and a converter in sequence.
The execution main body of the control method of the flywheel energy storage device provided by the embodiment is an energy management unit.
Referring to fig. 2, it shows a flowchart of an implementation of the control method of the flywheel energy storage device provided in the embodiment of the present application, and details are as follows:
s101: determining the working mode of the flywheel energy storage device according to the direct-current bus electric signal of the traction network and the steel rail potential; the working modes comprise an energy-saving mode, a voltage supporting mode, a steel rail potential mode, a voltage stabilizing mode and an emergency power supply mode.
Specifically, the energy management unit acquires direct-current bus voltage of the traction network through the direct-current voltage acquisition module, acquires direct-current bus current of the traction network through the direct-current acquisition module, acquires steel rail potential through the steel rail potential acquisition module, and acquires the switching states of the circuit breakers QF1 and QF2 and the disconnecting switches QS1 to QS6 through an SCADA (data acquisition and monitoring control system). Wherein the rail potential represents the rail voltage to ground. The energy management unit determines the working mode of the flywheel energy storage device according to a preset period, judges the voltage change rate of the direct current bus voltage, the direct current bus current, the steel rail potential and the direct current bus voltage in each period, and determines which working mode the direct current bus voltage, the direct current bus current, the steel rail potential and the direct current bus voltage in the period meet, so as to determine the working mode corresponding to the flywheel energy storage device.
In one possible embodiment, the dc bus electrical signal comprises a dc bus voltage and a dc bus current; the specific implementation process of S101 includes:
calculating the voltage change rate of the direct current bus voltage;
if the voltage change rate is smaller than a preset change rate threshold value, the direct-current bus voltage is within a preset network voltage range, and the steel rail potential is within a preset steel rail potential range, judging that the flywheel energy storage device works in an energy-saving mode;
if the voltage change rate is smaller than a preset change rate threshold value and the voltage of a direct current bus with a section of line on the direct current bus is smaller than a first voltage threshold value, judging that the flywheel energy storage device works in a voltage support mode;
if the voltage change rate is smaller than a preset change rate threshold value, the direct-current bus voltage is within a preset network voltage range, and the absolute value of the steel rail potential is larger than the maximum value of the steel rail potential, it is judged that the flywheel energy storage device works in a steel rail potential mode;
if the voltage change rate is smaller than a preset change rate threshold value and the direct current bus voltage of a section of line on the direct current bus is larger than a second voltage threshold value, judging that the flywheel energy storage device works in a voltage stabilization mode;
and if the voltage change rate is greater than a preset change rate threshold value and the direct current bus current is greater than a first current threshold value, judging that the flywheel energy storage device works in an emergency power supply mode.
Specifically, in any period, the energy management unit calculates the preset time before the current timeVoltage rate of change of DC bus voltage within the long term, if any
Less than a preset change rate threshold k and the DC bus voltage satisfies
And the rail potential satisfies
And judging that the traction network is in a normal state currently, and controlling the flywheel energy storage device to work in an energy-saving mode. Wherein the content of the first and second substances,
a voltage change value representing a preset time period,
which represents a preset time period of time,
which represents the voltage of the dc bus,
the lower limit value of the traction net is shown,
representing the upper limit value of the traction network;
the potential of the steel rail is shown,
the lower limit value of the rail potential is shown,
represents an upper limit of the rail potential.
The energy management unit monitors the direct current bus voltage of the whole section line of the traction network, and if the voltage change rate is smallThe DC bus voltage of a section of line exists on the DC bus of the traction network at the preset change rate threshold value
If the voltage drop of the section of traction network is serious, the flywheel energy storage device can be controlled to work in a voltage support mode. In particular, the first voltage threshold
Is the minimum value of the network voltage allowed by the line.
If the energy management unit monitors that the voltage change rate is smaller than a preset change rate threshold value, and
and are
The situation that the traction net voltage is normal but the steel rail potential is abnormal is explained, so that the flywheel energy storage device can be controlled to work in a steel rail potential mode.
If the energy management unit monitors that the voltage change rate is smaller than a preset change rate threshold value, and the voltage of a direct current bus of a section of line on the direct current bus of the traction network meets the requirement
If the voltage of the section of traction network is too high, the running safety of the vehicle is endangered, and the flywheel energy storage device can be controlled to work in a voltage stabilization mode. In particular, the second voltage threshold
The maximum allowed grid voltage of the line.
If the energy management unit monitors that the voltage change rate is larger than a preset change rate threshold value, namely the voltage is sharply reduced, and the direct current bus current is larger than a first current threshold value, it is determined that a traction network line has a fault, traction is quitted, and the flywheel energy storage device can be controlled to work in an emergency power supply mode.
Through the scheme, the current state of the traction network circuit can be judged according to the traction network direct-current bus electric signal and the steel rail potential, and the flywheel energy storage device is controlled to work in the corresponding working mode based on the state of the traction network circuit, so that safe and energy-saving operation of the traction network is realized.
S102: and under the energy-saving mode, controlling the flywheel energy storage device to work according to the magnitude of the direct current bus electric signal.
In one possible embodiment, the dc bus electrical signal comprises a dc bus voltage; the specific implementation process of S102 includes:
in the energy-saving mode, if the voltage of the direct current bus is greater than a first voltage reference value, controlling the flywheel energy storage device to work in a charging state; if the voltage of the direct current bus is smaller than a second voltage reference value, controlling the flywheel energy storage device to work in a discharging state;
Specifically, the offset m is obtained as follows:
acquiring a reference value of the offset;
and adjusting the offset on the basis of the reference value on the basis of the difference value between the residual capacity of the flywheel energy storage device and a preset capacity value.
Specifically, a reference value of the offset is set, if the remaining capacity of the flywheel energy storage device is greater than a preset capacity value, the offset is increased on the basis of the reference value, and if the remaining capacity of the flywheel energy storage device is less than the preset capacity value, the offset is decreased on the basis of the reference value, that is, a difference value between the remaining capacity of the flywheel energy storage device and the preset capacity value is positively correlated with an adjustment amount of the offset.
For example, the reference value of the offset may be 10V, and the preset electric quantity value percentage may be 50%.
S103: and under the voltage supporting mode or the voltage stabilizing mode, controlling the flywheel energy storage device to work according to the residual electric quantity of the flywheel energy storage device.
In a possible embodiment, the specific implementation flow of S103 includes:
based on the formula
Calculating the discharge power of the flywheel energy storage device in the voltage support mode; wherein the content of the first and second substances,
representing the discharge power of the flywheel energy storage means in the voltage support mode,
represents the remaining capacity of the flywheel energy storage means,
represents a low voltage duration;
based on the discharge power
And controlling the flywheel energy storage device to discharge.
In this embodiment, if the dc bus voltage of a certain line in the traction network drops seriously, the flywheel energy storage device can be made to operate in the voltage support mode, and the power of the flywheel energy storage device discharging to the traction network is determined based on the electric quantity of the flywheel energy storage device and the predicted low-voltage duration, so as to raise the dc bus voltage of the line section of the traction network.
In the present embodiment, the low voltage duration is simulated by a simulation model of the traction system. Specifically, the simulation model is constructed based on design parameters, and the design parameters include train-related parameters such as train information parameters, dynamic performance parameters, resistance parameters, traction characteristic parameters, electric brake characteristic parameters and the like of the train, and the number of stations in the traction network line, the position distribution of each station and the distance relationship between adjacent stations.
After the simulation model of the traction system is built, departure intervals and design parameters of the direct-current bus voltage drop line interval are input into the simulation model of the traction system, the running condition of the train is simulated, and the low-voltage drop time is obtained.
In a possible embodiment, the specific implementation flow of S103 further includes:
based on the formula
Calculating the charging power of the flywheel energy storage device in the voltage stabilization mode; wherein the content of the first and second substances,
representing the charging power of the flywheel energy storage device in a voltage stabilization mode,
represents the remaining capacity of the flywheel energy storage means,
represents a high voltage duration;
based on the charging power
And controlling the flywheel energy storage device to charge.
In this embodiment, when the dc bus voltage of the traction network is too high, the energy management unit controls the flywheel energy storage device to charge, and absorbs the redundant electric energy of the traction network, so as to stabilize the traction network voltage, and specifically, the high voltage duration is obtained by simulation based on a simulation model of the traction system.
S104: and under the steel rail potential mode, controlling the flywheel energy storage device to work according to the line working condition of the traction network.
Specifically, in the steel rail potential mode, if the traction net is in a traction state, the flywheel energy storage device is controlled to work in a discharge state; and if the traction network is in a braking state, controlling the flywheel energy storage device to work in a charging state.
S105: under the emergency power supply mode, calculating energy required for towing the target vehicle to a platform nearest to the target vehicle, and controlling the flywheel energy storage device to work based on the energy; the target vehicle is any vehicle on the route.
In this embodiment, in the emergency power mode, the flywheel energy storage device calculates the energy required for towing the vehicle to the nearest platform ahead according to the vehicle position, the vehicle current, the vehicle speed, the vehicle acceleration, and the vehicle towing and braking characteristic curve, and determines an appropriate power based on the required energy as the discharging power of the flywheel energy storage device in the emergency mode. Meanwhile, calculating the residual electric quantity of the flywheel energy storage device at the moment, if the residual electric quantity is insufficient, closing a circuit breaker isolating switch connected to a low-voltage system, charging the flywheel energy storage device through the low-voltage system, and discharging the flywheel by using the calculated discharge power until the train is pulled to a nearest platform; and if the residual electric quantity of the flywheel energy storage device is larger than the energy required for towing the vehicle to the nearest platform in front, directly controlling the flywheel energy storage device to discharge with the calculated discharge power until the train is towed to the nearest platform.
In one possible embodiment, the priority order of the respective operation modes is: the priority order of each working mode is as follows:
；
wherein the content of the first and second substances,
indicating the emergency power mode in question and,
the voltage support mode is represented by a voltage support pattern,
the voltage stabilization mode is represented by a voltage stabilization mode,
the potential pattern of the steel rail is shown,
indicating the energy saving mode.
In this embodiment, different working modes can be selected to operate according to different working conditions during the operation of the flywheel energy storage device, so as to realize the automatic switching of the working modes. However, the traction network circuit may have the situation that the traction network voltage is too high/the traction network voltage is too low and the rail potential is abnormal at the same time, so that the embodiment can preferentially process the more serious problem by setting the priority of the working mode under the situation that a plurality of problems occur at the same time, firstly ensure the safe operation of the traction system, and then ensure the energy-saving operation of the traction system, thereby achieving the maximization of the utilization of the flywheel energy storage device, the maximization of the economic benefit and the maximization of the function utilization.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
The following are apparatus embodiments of the present application, and for details not described in detail therein, reference may be made to the corresponding method embodiments described above.
Fig. 3 shows a schematic structural diagram of a control device of a flywheel energy storage device provided in an embodiment of the present application, and for convenience of description, only parts related to the embodiment of the present application are shown, and detailed descriptions are as follows:
as shown in fig. 3, the control device 100 for the flywheel energy storage device includes:
the mode judging module 110 is configured to determine a working mode of the flywheel energy storage device according to a direct-current bus electrical signal of the traction network and a rail potential; the working modes comprise an energy-saving mode, a voltage supporting mode, a steel rail potential mode, a voltage stabilizing mode and an emergency power supply mode;
the energy-saving mode control module 120 is configured to control the flywheel energy storage device to work according to the magnitude of the direct-current bus electrical signal in the energy-saving mode;
the hybrid control module 130 is configured to control the operation of the flywheel energy storage device according to the remaining power of the flywheel energy storage device in the voltage support mode or the voltage stabilization mode;
the steel rail potential mode control module 140 is configured to control the flywheel energy storage device to operate according to a line working condition of the traction network in the steel rail potential mode;
the emergency mode control module 150 is configured to calculate energy required for towing the target vehicle to a platform closest to the target vehicle in the emergency power mode, and control the flywheel energy storage device to operate based on the energy; the target vehicle is any vehicle on the route.
In one possible embodiment, the dc bus electrical signal comprises a dc bus voltage and a dc bus current; the mode determination module 110 includes:
calculating the voltage change rate of the direct current bus voltage;
if the voltage change rate is smaller than a preset change rate threshold value, the direct-current bus voltage is within a preset network voltage range, and the steel rail potential is within a preset steel rail potential range, judging that the flywheel energy storage device works in an energy-saving mode;
if the voltage change rate is smaller than a preset change rate threshold value and the voltage of a direct current bus with a section of line on the direct current bus is smaller than a first voltage threshold value, judging that the flywheel energy storage device works in a voltage support mode;
if the voltage change rate is smaller than a preset change rate threshold value, the direct-current bus voltage is within a preset network voltage range, and the absolute value of the steel rail potential is larger than the maximum value of the steel rail potential, it is judged that the flywheel energy storage device works in a steel rail potential mode;
if the voltage change rate is smaller than a preset change rate threshold value and the voltage of the direct current bus with a section of line on the direct current bus is larger than a second voltage threshold value, judging that the flywheel energy storage device works in a voltage stabilization mode;
and if the voltage change rate is greater than a preset change rate threshold value and the direct current bus current is greater than a first current threshold value, judging that the flywheel energy storage device works in an emergency power supply mode.
In one possible embodiment, the dc bus electrical signal comprises a dc bus voltage; the energy saving mode control module 120 includes:
in the energy-saving mode, if the voltage of the direct current bus is greater than a first voltage reference value, controlling the flywheel energy storage device to work in a charging state; if the voltage of the direct current bus is smaller than a second voltage reference value, controlling the flywheel energy storage device to work in a discharging state;
In one possible embodiment, the energy saving mode control module 120 further comprises:
acquiring a reference value of the offset;
and adjusting the offset on the basis of the reference value on the basis of the difference value between the residual capacity of the flywheel energy storage device and a preset capacity value.
In one possible embodiment, the hybrid control module 130 includes:
a voltage supporting unit for supporting voltage based on formula
Calculating the discharge power of the flywheel energy storage device in the voltage support mode; wherein the content of the first and second substances,
representing the discharge power of the flywheel energy storage means in the voltage support mode,
represents the remaining charge of the flywheel energy storage device,
represents a low voltage duration;
based on the discharge power
And controlling the flywheel energy storage device to discharge.
In one possible embodiment, the hybrid control module 130 further includes:
a voltage stabilization unit for being based on a formula
Calculating the charging power of the flywheel energy storage device in the voltage stabilization mode; wherein the content of the first and second substances,
representing the charging power of the flywheel energy storage device in a voltage stabilization mode,
represents the remaining capacity of the flywheel energy storage means,
represents a high voltage duration; based on the charging power
And controlling the flywheel energy storage device to charge.
In one possible embodiment, the priority order of the respective operation modes is: the priority order of each working mode is as follows:
；
wherein the content of the first and second substances,
indicating the emergency power mode in question,
the voltage support mode is represented by a voltage support pattern,
the voltage stabilization mode is represented by a voltage stabilization mode,
the potential pattern of the steel rail is shown,
indicating the energy saving mode.
The present application further provides a computer program product having a program code, which, when executed in a corresponding processor, controller, computing device or terminal, performs the steps in any of the above embodiments of the flywheel energy storage device control method, such as the steps S101 to S105 shown in fig. 2. Those skilled in the art will appreciate that the methods presented in the embodiments of the present application and the apparatus pertaining thereto may be implemented in various forms of hardware, software, firmware, special purpose processors, or a combination thereof. The special-purpose processor may include an Application Specific Integrated Circuit (ASIC), a Reduced Instruction Set Computer (RISC), and/or a Field Programmable Gate Array (FPGA). The proposed method and apparatus are preferably implemented as a combination of hardware and software. The software is preferably installed as an application program on a program storage device. It is typically a machine based computer platform having hardware such as one or more Central Processing Units (CPU), a Random Access Memory (RAM), and one or more input/output (I/O) interfaces. An operating system is also typically installed on the computer platform. The various processes and functions described herein may either be part of an application program or part may be performed by an operating system.
Fig. 4 is a schematic diagram of a terminal provided in an embodiment of the present application. As shown in fig. 4, the terminal 4 of this embodiment includes: a processor 40, a memory 41 and a computer program 42 stored in said memory 41 and executable on said processor 40. The processor 40, when executing the computer program 42, implements the steps in the above-mentioned embodiments of the control method for a flywheel energy storage device, such as the steps S101 to S105 shown in fig. 2. Alternatively, the processor 40, when executing the computer program 42, implements the functions of the modules/units in the above-mentioned device embodiments, such as the functions of the modules 110 to 150 shown in fig. 3.
Illustratively, the computer program 42 may be partitioned into one or more modules/units, which are stored in the memory 41 and executed by the processor 40 to implement the scheme provided herein. The one or more modules/units may be a series of computer program instruction segments capable of performing certain functions, which are used to describe the execution of the computer program 42 in the terminal 4. For example, the computer program 42 may be divided into the modules 110 to 150 shown in fig. 4.
The terminal 4 may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The terminal 4 may include, but is not limited to, a processor 40, a memory 41. Those skilled in the art will appreciate that fig. 4 is only an example of a terminal 4 and does not constitute a limitation of terminal 4 and may include more or less components than those shown, or some components in combination, or different components, for example, the terminal may also include input output devices, network access devices, buses, etc.
The Processor 40 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 41 may be an internal storage unit of the terminal 4, such as a hard disk or a memory of the terminal 4. The memory 41 may also be an external storage device of the terminal 4, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) and the like provided on the terminal 4. Further, the memory 41 may also include both an internal storage unit and an external storage device of the terminal 4. The memory 41 is used for storing the computer program and other programs and data required by the terminal. The memory 41 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. 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 application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal and method may be implemented in other ways. For example, the above-described apparatus/terminal embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method of the above embodiments may be implemented by a computer program, which may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the steps of the embodiments of the method for controlling a flywheel energy storage device may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like.
Furthermore, features of the embodiments shown in the drawings of the present application or of the various embodiments mentioned in the present description are not necessarily to be understood as embodiments independent of each other. Rather, each feature described in one example of one embodiment can be combined with one or more other desired features from other embodiments to yield yet further embodiments, which are not described in text or with reference to the accompanying drawings.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present application, and they should be construed as being included in the present application.
Claims (10)
1. A method of controlling a flywheel energy storage device, comprising:
determining the working mode of the flywheel energy storage device according to the direct-current bus electric signal of the traction network and the steel rail potential; the working modes comprise an energy-saving mode, a voltage supporting mode, a steel rail potential mode, a voltage stabilizing mode and an emergency power supply mode;
under the energy-saving mode, the flywheel energy storage device is controlled to work according to the magnitude of the direct current bus electric signal;
under the voltage supporting mode or the voltage stabilizing mode, controlling the flywheel energy storage device to work according to the residual electric quantity of the flywheel energy storage device;
under the steel rail potential mode, controlling the flywheel energy storage device to work according to the line working condition of the traction network;
under the emergency power supply mode, calculating energy required for towing a target vehicle to a platform nearest to the target vehicle, and controlling the flywheel energy storage device to work based on the energy; the target vehicle is any vehicle on the route.
2. The method of claim 1, wherein the dc bus electrical signal comprises a dc bus voltage and a dc bus current;
the working mode of the flywheel energy storage device is determined according to the direct-current bus electric signal of the traction network and the steel rail potential, and the working mode comprises the following steps:
calculating the voltage change rate of the direct current bus voltage;
if the voltage change rate is smaller than a preset change rate threshold value, the direct-current bus voltage is within a preset network voltage range, and the steel rail potential is within a preset steel rail potential range, judging that the flywheel energy storage device works in an energy-saving mode;
if the voltage change rate is smaller than a preset change rate threshold value and the voltage of a direct current bus with a section of line on the direct current bus is smaller than a first voltage threshold value, judging that the flywheel energy storage device works in a voltage support mode;
if the voltage change rate is smaller than a preset change rate threshold value, the direct-current bus voltage is within a preset network voltage range, and the absolute value of the steel rail potential is larger than the maximum value of the steel rail potential, it is judged that the flywheel energy storage device works in a steel rail potential mode;
if the voltage change rate is smaller than a preset change rate threshold value and the voltage of the direct current bus with a section of line on the direct current bus is larger than a second voltage threshold value, judging that the flywheel energy storage device works in a voltage stabilization mode;
and if the voltage change rate is greater than a preset change rate threshold value and the direct current bus current is greater than a first current threshold value, judging that the flywheel energy storage device works in an emergency power supply mode.
3. The method of claim 1, wherein the dc bus electrical signal comprises a dc bus voltage; under the energy-saving mode, the flywheel energy storage device is controlled to work according to the magnitude of the direct current bus electric signal, and the method comprises the following steps:
in the energy-saving mode, if the voltage of the direct current bus is greater than a first voltage reference value, controlling the flywheel energy storage device to work in a charging state; if the voltage of the direct current bus is smaller than a second voltage reference value, controlling the flywheel energy storage device to work in a discharging state;
4. The method of controlling a flywheel energy storage device of claim 3, the method further comprising:
acquiring a reference value of the offset;
and adjusting the offset on the basis of the reference value on the basis of the difference value between the residual capacity of the flywheel energy storage device and a preset capacity value.
5. The method for controlling the flywheel energy storage device according to claim 1, wherein in the voltage support mode, the method for controlling the flywheel energy storage device to operate according to the remaining electric quantity of the flywheel energy storage device comprises:
based on the formula
Calculating the discharge power of the flywheel energy storage device in the voltage support mode; wherein the content of the first and second substances,
representing the discharge power of the flywheel energy storage means in the voltage support mode,
represents the remaining charge of the flywheel energy storage device,
represents a low voltage duration;
based on the discharge power
And controlling the flywheel energy storage device to discharge.
6. The method for controlling the flywheel energy storage device according to claim 1, wherein in the voltage stabilization mode, the method for controlling the flywheel energy storage device to operate according to the residual electric quantity of the flywheel energy storage device comprises:
based on the formula
Calculating the charging power of the flywheel energy storage device in the voltage stabilization mode; wherein the content of the first and second substances,
representing the charging power of the flywheel energy storage device in a voltage stabilization mode,
represents the remaining capacity of the flywheel energy storage means,
represents a high voltage duration;
based on the charging power
And controlling the flywheel energy storage device to charge.
7. Root of herbaceous plantsA method as claimed in any one of claims 1 to 6, wherein the priority order of the respective operating modes is:
；
wherein the content of the first and second substances,
indicating the emergency power mode in question,
the voltage support mode is represented by a voltage support pattern,
the voltage stabilization mode is represented by a voltage stabilization mode,
the potential mode of the steel rail is shown,
indicating the energy saving mode.
8. A control apparatus for a flywheel energy storage device, comprising:
the mode judgment module is used for determining the working mode of the flywheel energy storage device according to the direct-current bus electric signal of the traction network and the steel rail potential; the working modes comprise an energy-saving mode, a voltage supporting mode, a steel rail potential mode, a voltage stabilizing mode and an emergency power supply mode;
the energy-saving mode control module is used for controlling the flywheel energy storage device to work according to the magnitude of the direct current bus electric signal in the energy-saving mode;
the hybrid control module is used for controlling the flywheel energy storage device to work according to the residual electric quantity of the flywheel energy storage device in the voltage supporting mode or the voltage stabilizing mode;
the steel rail potential mode control module is used for controlling the flywheel energy storage device to work according to the line working condition of the traction network in the steel rail potential mode;
the emergency mode control module is used for calculating energy required for towing a target vehicle to a platform nearest to the target vehicle in the emergency power supply mode and controlling the flywheel energy storage device to work based on the energy; the target vehicle is any vehicle on the route.
9. A terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method for controlling a flywheel energy storage device as claimed in any of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, in which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of controlling a flywheel energy storage device according to any of claims 1 to 7 above.
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