CN113533847B - Rail transit regenerative braking energy metering method and metering equipment - Google Patents
Rail transit regenerative braking energy metering method and metering equipment Download PDFInfo
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- CN113533847B CN113533847B CN202110909191.3A CN202110909191A CN113533847B CN 113533847 B CN113533847 B CN 113533847B CN 202110909191 A CN202110909191 A CN 202110909191A CN 113533847 B CN113533847 B CN 113533847B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/10—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods using digital techniques
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
- B61H9/00—Brakes characterised by or modified for their application to special railway systems or purposes
- B61H9/06—Brakes characterised by or modified for their application to special railway systems or purposes for storing energy during braking action
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/008—Testing of electric installations on transport means on air- or spacecraft, railway rolling stock or sea-going vessels
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Abstract
The invention is applicable to the technical field of rail transit, and provides a rail transit regenerative braking energy metering method and metering equipment, wherein the method comprises the following steps: acquiring the power of a first power supply arm and the power of a second power supply arm; when the positive and negative signs of the power of the first power supply arm and the positive and negative signs of the power of the second power supply arm are detected to be opposite, the power value transferred between the first power supply arm and the second power supply arm and the corresponding transfer time are obtained, and the target regeneration energy value is determined according to the power value transferred between the first power supply arm and the second power supply arm and the corresponding transfer time. The invention starts to measure the regenerated energy value when the opposite sign of the two-arm power is detected, ensures that all the measured regenerated energy is the regenerated energy, and can accurately measure the regenerated energy value of the rail transit power supply system.
Description
Technical Field
The invention belongs to the technical field of rail transit, and particularly relates to a rail transit regenerative braking energy metering method and metering equipment.
Background
The power regulator (Railway static power conditioner, RPC) has the ability to control the active, reactive and harmonic currents of the two phases of the substation, while the transfer of active power can be directly achieved. Usually, an RPC (remote procedure control) can be arranged in a railway traction power supply system, two power supply arms with different phases of a traction substation are connected in parallel, so that the two power supply arms are interconnected and intercommunicated, and energy can be mutually invoked.
In the prior art, an ammeter is generally adopted to measure energy transfer between two power supply arms, but as the energy transfer between the two power supply arms is not completely utilized by regenerated energy, the regenerated energy cannot be distinguished, and the quantity of the regenerated energy of the railway cannot be accurately measured.
Disclosure of Invention
In view of the above, the embodiment of the invention provides a track traffic regenerative braking energy metering method and metering equipment, which are used for solving the problem that the quantity of railway regenerative energy cannot be accurately determined by adopting an electric energy meter in the prior art.
A first aspect of an embodiment of the present invention provides a method for measuring regenerative braking energy of rail transit, including:
acquiring the power of a first power supply arm and the power of a second power supply arm;
when the positive and negative signs of the power of the first power supply arm and the positive and negative signs of the power of the second power supply arm are detected to be opposite, the power value transferred between the first power supply arm and the second power supply arm and the corresponding transfer time are obtained, and the target regeneration energy value is determined according to the power value transferred between the first power supply arm and the second power supply arm and the corresponding transfer time.
Optionally, obtaining a power value transferred between the first power supply arm and the second power supply arm and a corresponding transfer time, and determining a target regenerated energy value according to the power value transferred between the first power supply arm and the second power supply arm and the corresponding transfer time, including:
acquiring a power instruction value of a power regulator and corresponding power instruction issuing time;
multiplying the power command value of the power regulator by the corresponding power command issuing time to obtain an intermediate regenerated energy value;
the intermediate regenerated energy value is multiplied by the efficiency of the power regulator to obtain a target regenerated energy value.
Optionally, obtaining a power value transferred between the first power supply arm and the second power supply arm and a corresponding transfer time, and determining a target regenerated energy value according to the power value transferred between the first power supply arm and the second power supply arm and the corresponding transfer time, including:
acquiring an execution power instruction value and corresponding power instruction issuing time of a power regulator;
multiplying the execution power instruction value of the power regulator by the corresponding power instruction issuing time to obtain an intermediate regenerated energy value;
the intermediate regenerated energy value is multiplied by the efficiency of the power regulator to obtain a target regenerated energy value.
Optionally, the method further comprises:
the target regenerated energy value is sent to a display device and displayed.
Optionally, the method further comprises:
and obtaining and accumulating a plurality of target regenerated energy values in a preset period to obtain a total regenerated energy value in the preset period.
Optionally, the method further comprises:
and acquiring the electrical parameters of the rail transit traction power supply system, generating a power instruction according to the electrical parameters of the rail transit traction power supply system, and sending the power instruction to a power regulator.
A second aspect of an embodiment of the present invention provides a rail transit regenerative braking energy metering device, including:
the parameter acquisition module is used for acquiring the power of the first power supply arm and the power of the second power supply arm;
and the first calculation module is used for acquiring the power value transferred between the first power supply arm and the second power supply arm and the corresponding transfer time when the positive and negative signs of the power of the first power supply arm and the power of the second power supply arm are detected to be opposite, and determining the target regenerated energy value according to the power value transferred between the first power supply arm and the second power supply arm and the corresponding transfer time.
Optionally, the apparatus further includes:
the second calculation module is used for obtaining and accumulating a plurality of target regenerated energy values in a preset period to obtain a total regenerated energy value in the preset period.
A third aspect of an embodiment of the present invention provides a metering device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the rail transit regenerative braking energy metering method as provided in the first aspect of the embodiment of the present invention when the computer program is executed by the processor.
A fourth aspect of the embodiments of the present invention provides a computer readable storage medium storing a computer program which when executed by a processor implements the steps of the rail transit regenerative braking energy metering method as provided in the first aspect of the embodiments of the present invention.
The embodiment of the invention provides a track traffic regenerative braking energy metering method and metering equipment, wherein the method comprises the following steps: acquiring the power of a first power supply arm and the power of a second power supply arm; when the positive and negative signs of the power of the first power supply arm and the positive and negative signs of the power of the second power supply arm are detected to be opposite, the power value transferred between the first power supply arm and the second power supply arm and the corresponding transfer time are obtained, and the target regeneration energy value is determined according to the power value transferred between the first power supply arm and the second power supply arm and the corresponding transfer time. The embodiment of the invention starts to meter the regenerated energy value when the two arms of power are detected to have opposite signs, ensures that all the metered regenerated energy is the regenerated energy, and can precisely meter the regenerated energy value of the rail transit power supply system.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a railway traction power supply system provided by an embodiment of the present invention;
fig. 2 is a schematic diagram of an implementation flow of a track traffic regenerative braking energy metering method according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a rail transit regenerative braking energy metering device provided by an embodiment of the present invention;
fig. 4 is a schematic view of a metering device provided by an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention 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 invention with unnecessary detail.
In order to illustrate the technical scheme of the invention, the following description is made by specific examples.
Referring to fig. 1, a railway electric locomotive is in a traction condition when started or normally driven, and at this time, a train takes electricity from a traction network to be used for train traction; when the train is in a braking working condition during deceleration or stopping, the electric locomotive adopts regenerative braking, and braking energy is fed back to the traction network at the moment. The railway traction power supply system supplies power for a single phase, phases of two power supply arms (an A-phase power supply arm and a B-phase power supply arm) are different, and energy between the two arms cannot be mutually transferred. In order to realize the mutual transfer of the energy of the two arms, an RPC (remote procedure control) can be arranged in a railway traction power supply system, and the two power supply arms with different traction substation phases are connected in parallel, so that the two power supply arms are interconnected and mutually communicated, and the energy can be transferred mutually.
Since the function of the Railway Power Conditioner (RPC) is to balance the load of the two supply arms, it is divided into a plurality of conditions at the time of energy transfer: 1. when the phase A power supply arm and the phase B power supply arm are both positive power, the phase A power supply arm transfers energy to the phase B power supply arm or the phase B power supply arm transfers energy to the phase A power supply arm; 2. when the phase A power supply arm and the phase B power supply arm are both negative power, the phase A power supply arm transfers energy to the phase B power supply arm or the phase B power supply arm transfers energy to the phase A power supply arm; 3. the phase A power supply arm is positive power, the phase B power supply arm is negative power, and the phase B power supply arm transfers energy to the phase A power supply arm; 4. the phase A power arm is negative power, the phase B power arm is positive power, and the phase A power arm transfers energy to the phase B power arm. Wherein, the locomotive traction power is positive power and the locomotive braking power is negative power.
For the first working condition, the two power supply arms are in a traction state, the two bridge arms take power from the power grid, and the regenerative braking energy utilization rate is zero. For the second working condition, the two power supply arms are in a regenerative braking state, the RPC can only transmit regenerative braking energy back to the power grid or store the regenerative braking energy in the energy storage system, and the utilization rate of the regenerative braking energy is zero at the moment. For the third working condition and the fourth working condition, when one bridge arm is in a regenerative braking state and the other bridge arm is in a traction state, the RPC transfers the regenerative braking energy to the traction side through power transfer, so that the utilization of the regenerative braking energy can be realized; therefore, only the energy transferred for the third and fourth conditions is regenerated braking energy. In the prior art, because the electricity metering quantity of the ammeter is calculated according to the voltage and current signals at the metering position, each working condition can be metered when the ammeter meters the energy transfer quantity of electricity, and the regenerated energy cannot be accurately metered.
Based on the above, referring to fig. 2, the implementation of the present invention provides a track traffic regenerative braking energy metering method, which includes:
s101: acquiring the power of a first power supply arm and the power of a second power supply arm;
s102: when the positive and negative signs of the power of the first power supply arm and the positive and negative signs of the power of the second power supply arm are detected to be opposite, the power value transferred between the first power supply arm and the second power supply arm and the corresponding transfer time are obtained, and the target regeneration energy value is determined according to the power value transferred between the first power supply arm and the second power supply arm and the corresponding transfer time.
Based on the analysis, only the third working condition and the fourth working condition are the regenerated energy transferred by the two power supply arms, and the power values of the two power supply arms are positive and negative and have opposite signs when the third working condition and the fourth working condition are carried out. Therefore, in the embodiment of the invention, the positive and negative signs of the power of the two power supply arms are detected, the working condition is determined according to the positive and negative signs of the power of the two power supply arms, and the metering is performed only when the opposite positive and negative signs of the power of the two power supply arms are detected, so that the metered regenerated energy is ensured, and the regenerated energy value of the rail transit power supply system can be accurately metered.
In some embodiments, S102 may include:
s1021: acquiring a power instruction value of a power regulator and corresponding power instruction issuing time;
s1022: multiplying the power command value of the power regulator by the corresponding power command issuing time to obtain an intermediate regenerated energy value;
s1023: the intermediate regenerated energy value is multiplied by the efficiency of the power regulator to obtain a target regenerated energy value.
For the power regulator, the controller generally acquires the electrical parameters of the railway traction power supply system, generates a power command according to the electrical parameters of the railway traction power supply system, and sends the power command to the power regulator, and the power regulator controls the energy transfer of the two power supply arms according to the power value (power command value) specified in the power command (the four working conditions). In the embodiment of the invention, the target regenerated energy value is obtained by multiplying the power instruction value of the power regulator by the issuing time and efficiency, and the regenerated energy value can be accurately measured.
In some embodiments, S102 may include:
s1024: acquiring an execution power instruction value and corresponding power instruction issuing time of a power regulator;
s1025: multiplying the execution power instruction value of the power regulator by the corresponding power instruction issuing time to obtain an intermediate regenerated energy value;
s1026: the intermediate regenerated energy value is multiplied by the efficiency of the power regulator to obtain a target regenerated energy value.
Furthermore, the embodiment of the invention can also determine the target regeneration energy value according to the power command value fed back by the power regulator, namely the actual execution power command value fed back by the power regulator, and the calculation result is more accurate.
In some embodiments, the method may further include:
s103: the target regenerated energy value is sent to a display device and displayed.
And the target regenerated energy value is displayed on a display device, so that the target regenerated energy value is convenient for a user to check. Meanwhile, the display device is also communicated with a remote control system and transmits information.
In some embodiments, the method may further include:
s104: and obtaining and accumulating a plurality of target regenerated energy values in a preset period to obtain a total regenerated energy value in the preset period.
The preset time period may be one day or one month, and S101 to S102 are repeatedly executed in the preset time period to obtain a plurality of target regenerated energy values, and the plurality of target regenerated energy values are accumulated to obtain a total regenerated energy value in the preset time period, so that statistical analysis is convenient.
In some embodiments, the method may further include:
s105: and acquiring the electrical parameters of the rail transit traction power supply system, generating a power instruction according to the electrical parameters of the rail transit traction power supply system, and sending the power instruction to a power regulator.
Furthermore, in the embodiment of the invention, a power analyzer can be installed at the secondary signal loop of the PRC circuit breaker to determine whether the regenerated energy value obtained by the metering method is accurate. And collecting current signals and voltage signals corresponding to the A-phase circuit breaker and the B-phase circuit breaker, respectively accessing the two channels of the power analyzer, operating the power analyzer to start metering when the positive and negative signs of the power of the two channels on the power analyzer are opposite, wherein a negative value is given transfer power, a positive value is actual transfer power after loss, and the ratio of the two is the efficiency of the PRC, and the efficiency of the PRC can be determined by the method. Meanwhile, the metering is carried out by adopting the method provided by the embodiment of the invention. After the current working condition is finished, the power analyzer is operated to stop metering, and the metering result of the power analyzer and the metering result obtained by the metering method provided by the embodiment of the invention are compared, and the two metering results are basically consistent through comparison, so that the feasibility and the accuracy of the method are verified.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
Corresponding to the above embodiment, referring to fig. 3, an embodiment of the present invention further provides a track traffic regenerative braking energy metering device, including:
a parameter obtaining module 21, configured to obtain power of the first power supply arm and power of the second power supply arm;
the first calculation module 22 is configured to obtain a power value transferred between the first power supply arm and the second power supply arm and a corresponding transfer time when it is detected that the sign of the power of the first power supply arm is opposite to the sign of the power of the second power supply arm, and determine a target regenerated energy value according to the power value transferred between the first power supply arm and the second power supply arm and the corresponding transfer time.
In some embodiments, the first computing module 22 may include:
a first instruction obtaining unit 221, configured to obtain an execution power instruction value and a corresponding power instruction issue time of the power regulator;
a first energy calculating unit 222, configured to multiply the execution power command value of the power regulator by the corresponding power command issue time to obtain an intermediate regenerated energy value;
the second energy calculating unit 223 is configured to multiply the intermediate regenerated energy value by the efficiency of the power regulator to obtain a target regenerated energy value.
In some embodiments, the first computing module 22 may include:
a second instruction obtaining unit 224, configured to obtain an execution power instruction value and a corresponding power instruction issue time of the power regulator;
a third energy calculating unit 225, configured to multiply the execution power command value of the power regulator by the corresponding power command issue time to obtain an intermediate regenerated energy value;
a fourth energy calculation unit 226 for multiplying the intermediate regenerated energy value by the efficiency of the power regulator to obtain a target regenerated energy value.
In some embodiments, the apparatus may further include:
and a display module 23 for transmitting and displaying the target regenerated energy value to the display device.
In some embodiments, the apparatus may further include:
the third calculation module 24 is configured to obtain an electrical parameter of the rail transit traction power supply system, generate a power command according to the electrical parameter of the rail transit traction power supply system, and send the power command to the power regulator.
In some embodiments, the apparatus may further include:
the second calculation module 25 is configured to obtain and accumulate a plurality of target regenerated energy values within a preset period of time, so as to obtain a total regenerated energy value within the preset period of time.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional allocation may be performed by different functional units and modules according to needs, i.e. the internal structure of the metering device is divided into different functional units or modules, so as to perform all or part of the functions described above. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a 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 process of the units and modules in the above device may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
Fig. 4 is a schematic block diagram of a metering device provided in an embodiment of the invention. As shown in fig. 4, the metering device 4 of this embodiment includes: one or more processors 40, a memory 41, and a computer program 42 stored in the memory 41 and executable on the processor 40. The steps of the various embodiments of the rail transit regenerative braking energy metering method described above, such as steps S101 through S102 shown in fig. 2, are implemented by the processor 40 when executing the computer program 42. Alternatively, the processor 40, when executing the computer program 42, performs the functions of the modules/units of the embodiments of the rail transit regenerative braking energy metering device described above, such as the functions of the modules 21-22 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 complete the present application. One or more of the modules/units may be a series of computer program instruction segments capable of performing a specific function, the instruction segments describing the execution of the computer program 42 in the metering device 4. For example, the computer program 42 may be partitioned into the parameter acquisition module 21 and the first calculation module 22.
A parameter obtaining module 21, configured to obtain power of the first power supply arm and power of the second power supply arm;
the first calculation module 22 is configured to obtain a power value transferred between the first power supply arm and the second power supply arm and a corresponding transfer time when it is detected that the sign of the power of the first power supply arm is opposite to the sign of the power of the second power supply arm, and determine a target regenerated energy value according to the power value transferred between the first power supply arm and the second power supply arm and the corresponding transfer time.
Other modules or units are not described in detail herein.
The processor 40 may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. 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 metering device, such as a hard disk or a memory of the metering device. The memory 41 may also be an external storage device of the metering device, such as a plug-in hard disk provided on the metering device, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), or the like. Further, the memory 41 may also include both an internal memory unit of the metering device and an external memory device. The memory 41 is used to store a computer program 42 and other programs and data required by the metering device. The memory 41 may also be used to temporarily store data that has been output or is to be output.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
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 solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided herein, it should be understood that the disclosed metering apparatus and method may be implemented in other ways. For example, the metering device embodiments described above are merely illustrative, e.g., the division of modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present application may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, where the computer program, when executed by a processor, may implement the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, executable files or in some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the content of the computer readable medium can be appropriately increased or decreased according to the requirements of the jurisdiction's jurisdiction and the patent practice, for example, in some jurisdictions, the computer readable medium does not include electrical carrier signals and telecommunication signals according to the jurisdiction and the patent practice.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (8)
1. A rail transit regenerative braking energy metering method, comprising:
acquiring the power of a first power supply arm and the power of a second power supply arm;
when the positive and negative signs of the power of the first power supply arm are detected to be opposite to the positive and negative signs of the power of the second power supply arm, acquiring a power value transferred between the first power supply arm and the second power supply arm and corresponding transfer time, and determining a target regenerated energy value according to the power value transferred between the first power supply arm and the second power supply arm and the corresponding transfer time;
the obtaining the power value transferred between the first power supply arm and the second power supply arm and the corresponding transfer time, and determining the target regenerated energy value according to the power value transferred between the first power supply arm and the second power supply arm and the corresponding transfer time, includes:
acquiring a power instruction value of a power regulator and corresponding power instruction issuing time; multiplying the power command value of the power regulator by the corresponding power command issuing time to obtain a first intermediate regenerated energy value; multiplying the first intermediate regenerated energy value by the efficiency of the power regulator to obtain the target regenerated energy value; or (b)
Acquiring an execution power instruction value and corresponding power instruction issuing time of a power regulator; multiplying the execution power instruction value of the power regulator by the corresponding power instruction issuing time to obtain a second intermediate regenerated energy value; multiplying the second intermediate regenerated energy value by the efficiency of the power regulator to obtain the target regenerated energy value.
2. The rail transit regenerative braking energy metering method of claim 1, further comprising:
and sending the target regenerated energy value to a display device for display.
3. The rail transit regenerative braking energy metering method of claim 1, further comprising:
and obtaining and accumulating a plurality of target regenerated energy values in a preset period to obtain a total regenerated energy value in the preset period.
4. The rail transit regenerative braking energy metering method of claim 1, further comprising:
and acquiring the electrical parameters of the rail transit traction power supply system, generating a power instruction according to the electrical parameters of the rail transit traction power supply system, and issuing the power instruction to a power regulator.
5. A rail transit regenerative braking energy metering device, comprising:
the parameter acquisition module is used for acquiring the power of the first power supply arm and the power of the second power supply arm;
the first calculation module is used for acquiring a power value transferred between the first power supply arm and the second power supply arm and corresponding transfer time when detecting that the positive and negative signs of the power of the first power supply arm are opposite to the positive and negative signs of the power of the second power supply arm, and determining a target regenerated energy value according to the power value transferred between the first power supply arm and the second power supply arm and the corresponding transfer time;
the first computing module includes:
the first instruction acquisition unit is used for acquiring a power instruction value of the power regulator and corresponding power instruction issuing time;
the first energy calculating unit is used for multiplying the power instruction value of the power regulator by the corresponding power instruction issuing time to obtain a first intermediate regenerated energy value;
a second energy calculation unit for multiplying the first intermediate regenerated energy value by the efficiency of the power regulator to obtain the target regenerated energy value; or (b)
The first computing module includes:
the second instruction acquisition unit is used for acquiring an execution power instruction value and corresponding power instruction issuing time of the power regulator;
the third energy calculating unit is used for multiplying the execution power instruction value of the power regulator by the corresponding power instruction issuing time to obtain a second intermediate regenerated energy value;
and a fourth energy calculation unit, configured to multiply the second intermediate regenerated energy value by the efficiency of the power regulator, to obtain the target regenerated energy value.
6. The rail transit regenerative braking energy metering device of claim 5, further comprising:
the second calculation module is used for obtaining and accumulating a plurality of target regenerated energy values in a preset period to obtain a total regenerated energy value in the preset period.
7. A metering device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the rail transit regenerative braking energy metering method according to any one of claims 1 to 4 when the computer program is executed.
8. A computer-readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the rail transit regenerative braking energy metering method of any one of claims 1 to 4.
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