CN116702512A - Method and device for calculating carbon emission responsibility of direct-current traction power supply system - Google Patents

Method and device for calculating carbon emission responsibility of direct-current traction power supply system Download PDF

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CN116702512A
CN116702512A CN202310959143.4A CN202310959143A CN116702512A CN 116702512 A CN116702512 A CN 116702512A CN 202310959143 A CN202310959143 A CN 202310959143A CN 116702512 A CN116702512 A CN 116702512A
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陆超
李笑倩
李占赫
包维瀚
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Tsinghua University
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Abstract

The invention relates to the technical field of traction power supply, in particular to a method and a device for calculating carbon emission responsibility of a direct current traction power supply system, wherein the method comprises the following steps: acquiring real-time electrical information and train position information of a plurality of traction stations in a direct-current traction power supply system to establish a node position relationship of any row line between any adjacent traction stations, and acquiring power flows of each branch and each node by utilizing the real-time electrical information; based on a preset trend tracking algorithm, carrying out real-time trend tracking according to the power flow of each branch and each node, determining the carbon emission intensity of the power supply node, and calculating the carbon emission responsibility transmitted on the branch and the carbon emission responsibility of the node according to the carbon emission intensity of the power supply node so as to obtain a carbon emission responsibility calculation result of the direct current traction power supply system for real-time operation. Therefore, the problems that the characteristics of energy producers and consumers of the train are ignored, real-time tide tracking is difficult and the like in the existing carbon emission responsibility accounting are solved.

Description

Method and device for calculating carbon emission responsibility of direct-current traction power supply system
Technical Field
The invention relates to the technical field of traction power supply, in particular to a method and a device for calculating carbon emission responsibility of a direct-current traction power supply system.
Background
The direct current traction power supply system is a power supply system for supplying power to a train by adopting a direct current network. Along with the serious environmental deterioration and energy crisis, energy conservation and carbon reduction of the direct current traction power supply system become an important development direction. New carbon trade policies are increasingly implemented in some countries and regions. These new carbon trade policies facilitate carbon emissions reduction. Common new carbon transaction policies are: carbon tax and carbon quota.
In the context of new carbon transaction policies, operators of dc traction power systems may need to pay more fees for carbon emission liabilities, which may be exceeded by additional credits. Therefore, the calculation of the carbon emission responsibility which the direct current traction power supply system needs to bear in the actual operation becomes a necessary ring for the system to effectively and reasonably participate in the new carbon transaction policy. The carbon emission responsibility calculation of the direct current traction power supply system becomes a key technical problem to be solved in real-time operation.
At present, in the prior art, there is no calculation of carbon emission responsibility for a direct current traction power supply system, but there are 4 methods for calculating carbon emission responsibility of an electric power system:
related art an averaging factor method, which uses electricity to average factor=carbon emission responsibility. The method is simple, reliable and easy to operate, is widely applied to carbon emission responsibility calculation related to electricity consumption, but the average factor is difficult to determine, data needs to be updated once in a few years, in addition, the same power grid in a large geographic range adopts the same factor, new energy, thermal power and water and electricity share one factor, the factor is unreasonable, and the calculation result of the average factor method is inaccurate due to the factor;
the method of the related art two-game theory can perform carbon emission responsibility calculation, but the calculation process is complex, lacks definite physical significance, relates to a complex management process and competition game behavior, and is not applied to engineering at present;
the related art three-sensitivity method is only suitable for measuring marginal carbon emission responsibility of load change, and is not applied to engineering at present;
related art four carbon emission stream method: carbon emission flows are defined as virtual network flows attached to tidal flows, and by adding a "carbon label" to each node or branch tidal flow, the method can calculate the carbon emission responsible flow for each node or branch, respectively. In addition, the trend tracking method evaluates how much of the power output of a particular energy producer flows to a particular energy consumer or particular line, and the carbon displacement flow method can track carbon emission liability transfer from each generator to consumer, taking into account the "carbon signature" and trend tracking results. The method is capable of reasonably distributing carbon emission responsibilities among energy consumers, is easy to implement, has visual physical significance, is widely adopted in related researches and starts to be adopted in engineering projects, but is mainly aimed at the real-time operation of a common power system instead of a traction power supply system, does not consider the characteristics of energy producers and consumers of a train, and is not capable of carrying out real-time trend tracking difficulty, so that the method cannot be applied to the real-time power flow of the traction power supply system to calculate the real-time power flow of the train.
Disclosure of Invention
The invention provides a method and a device for calculating carbon emission responsibility of a direct current traction power supply system, which are used for solving the problems that in the calculation of the carbon emission responsibility, the main load in the traction power supply system is a train, the train is ignored, namely an energy consumer bearing the carbon emission responsibility, the carbon emission responsibility is transferred to an energy producer of other energy consumers, the train moves rapidly along a track, the number, the topological structure and the electrical parameters of branches change rapidly, the power flow of the branches cannot be measured directly, the real-time power flow calculation is difficult to solve to obtain the real-time branch power flow, only a transponder in an engineering project is applied to the positioning of the train, the real-time train position cannot be obtained, the length and the parameters of each branch are difficult to determine, and then the real-time power flow cannot be solved.
An embodiment of a first aspect of the present invention provides a method for calculating carbon emission responsibility of a direct current traction power supply system, including the steps of: acquiring real-time electric information and real-time train position information of a plurality of traction stations in a direct-current traction power supply system; establishing a node position relation of any row line between any adjacent traction stations according to the real-time train position information, and obtaining the power flow of each branch and the power flow of each node according to the node position relation and the real-time electric information; based on a preset power flow tracking algorithm, carrying out real-time power flow tracking according to the power flow of each branch and the power flow of each node so as to determine the carbon emission intensity of the power supply node; and calculating carbon emission responsibility transmitted on the branch and carbon emission responsibility of the node according to the carbon emission intensity of the power supply node so as to obtain a carbon emission responsibility calculation result of the direct current traction power supply system for real-time operation.
Optionally, the real-time electrical information includes: at least one of the voltages of a plurality of traction stations DC side ports in the DC traction power supply system, the on-line feeder current of a traction station on a traction network, all train voltage information and all train current information; the real-time train position information includes at least one of zone position information of all trains and a relative positional relationship between all trains and a traction station.
Optionally, the determining the carbon emission intensity of the power supply node includes: acquiring the actual type of the power supply node; under the condition that the actual type is an external power supply, determining the carbon emission intensity of the power supply node through an external power grid; under the condition that the actual type is new energy, the carbon emission intensity of the power supply node is zero; and under the condition that the actual type is a train generating electric energy through regenerative braking, establishing a train carbon emission flow model, and calculating the carbon emission intensity of the power supply node through the train carbon emission flow model.
Optionally, the building a train carbon emission flow model, calculating the carbon emission intensity of the power supply node through the train carbon emission flow model includes: acquiring a first total inflow electric energy and a carbon emission flow of a target train in a preset time period, and a second total inflow electric energy and a carbon emission flow of the target train between two stations; establishing the train carbon emission flow model by utilizing the first total inflow electric energy and the carbon emission flow and the second total inflow electric energy and the carbon emission flow, wherein a calculation formula of the train carbon emission flow model is as follows:
wherein ,for the current time point, +.>Time step calculated for carbon emission liability, +.>For presetting train->Total inflowing electric energy between two stations, < >>For presetting train->Power of->For presetting train->Total inflow electrical energy accumulated during a preset period of time, < >>For presetting train->Total inflow carbon emission flow between two stations,/->For presetting train->Carbon emission liability of->For presetting train->Total inflow carbon emission flow accumulated during a preset period of time,/->For presetting train->Node carbon emission intensity of (c).
An embodiment of a second aspect of the present invention provides a carbon emission liability calculation device for a direct current traction power supply system, including: the acquisition module is used for acquiring real-time electric information and real-time train position information of a plurality of traction stations in the direct-current traction power supply system; the construction module is used for establishing a node position relation of any row line between any adjacent traction stations according to the real-time train position information, and obtaining the power flow of each branch and the power flow of each node according to the node position relation and the real-time electric information; the determining module is used for carrying out real-time power flow tracking according to the power flow of each branch and the power flow of each node based on a preset power flow tracking algorithm so as to determine the carbon emission intensity of the power supply node; and the calculation module is used for calculating the carbon emission responsibility transmitted on the branch and the carbon emission responsibility of the node according to the carbon emission intensity of the power supply node so as to obtain a carbon emission responsibility calculation result of the direct current traction power supply system for running in real time.
Optionally, the real-time electrical information includes: the real-time train position information comprises at least one of section position information of a train and relative position relations between all trains and a traction station.
Optionally, the determining module includes: the acquisition unit is used for acquiring the actual type of the power supply node; the first determining unit is used for determining the carbon emission intensity of the power supply node through an external power grid under the condition that the actual type is the external power supply; a second determining unit, configured to, in a case where the actual type is a new energy source, make the carbon emission intensity of the power supply node zero; and the calculation unit is used for establishing a train carbon emission flow model and calculating the carbon emission intensity of the power supply node through the train carbon emission flow model under the condition that the actual type is a train generating electric energy through regenerative braking.
Optionally, the computing unit is specifically configured to: acquiring a first total inflow electric energy and a carbon emission flow of a target train in a preset time period, and a second total inflow electric energy and a carbon emission flow of the target train between two stations; establishing the train carbon emission flow model by utilizing the first total inflow electric energy and the carbon emission flow and the second total inflow electric energy and the carbon emission flow, wherein a calculation formula of the train carbon emission flow model is as follows:
wherein ,for the current time point, +.>Time step calculated for carbon emission liability, +.>For presetting train->Total inflowing electric energy between two stations, < >>For presetting train->Power of->For presetting train->Total inflow electrical energy accumulated during a preset period of time, < >>For presetting train->Total inflow carbon emission flow between two stations,/->For presetting train->Carbon emission liability of->For presetting train->Total inflow carbon emission flow accumulated during a preset period of time,/->For presetting train->Node carbon emission intensity of (c).
The method and the device for calculating the carbon emission responsibility of the direct-current traction power supply system can realize reasonable and practical calculation of the carbon emission responsibility of the system in a real-time operation scene, and improve a tide tracking method and establish a train carbon emission flow model by combining the characteristics of the direct-current traction power supply system; the method has the advantages that a new carbon emission policy is participated in the real-time operation of the direct current traction power supply system, the carbon emission responsibility of the direct current traction power supply system is evaluated in real time, an indispensable technology is provided, and a foundation is laid for the related research of the future direct current traction power supply system, including low-carbon planning, low-carbon operation and carbon transaction; in addition, an important reference value is provided for an alternating current traction power supply system in the rail transit electrification field.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
fig. 1 is a flowchart of a method for calculating carbon emission responsibility of a direct current traction power supply system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of DC side electrical measurement point positions according to an embodiment of the invention;
FIG. 3 is a drawing of a traction station according to an embodiment of the inventionAnd traction institute->A certain row line diagram;
fig. 4 is a block diagram of a dc traction power supply system carbon emission liability arrangement for real-time operation according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
Fig. 1 is a schematic flow chart of carbon emission responsibility calculation of a dc traction power supply system for real-time operation according to an embodiment of the present invention.
As shown in fig. 1, the method for calculating the carbon emission responsibility of the direct current traction power supply system comprises the following steps:
in step S101, real-time electric information and real-time train position information of a plurality of traction stations in the direct-current traction power supply system are acquired.
Specifically, the embodiment of the invention needs to determine network power and voltage information of the system according to real-time measurement information, and the direct current side measuring point of the conventional engineering electric measurement system comprises: the voltage of the direct current side port of the traction station, the current of the internet feeder line of the traction station to the traction network, and the voltage and current information of the train. Therefore, as shown in fig. 2, according to the embodiment of the present invention, the voltage and the current at the measuring point position in the drawing are physical quantities that can be obtained by real-time measurement, and the obtained real-time electrical information specifically includes: at least one of voltage of a plurality of traction station DC side ports in a DC traction power supply system, on-line feeder current on a traction station traction network, all train voltage information and all train current information.
In addition to the measurement of the electrical information, the embodiment of the invention also needs to consider the measurement of the train position information. Such measurements can be divided into two categories: one type can only acquire the section where the train is located, and the positioning accuracy is in the order of hundreds of meters, such as a transponder method; the other type can obtain the accurate position of the train, and the positioning precision is in the meter level, such as a gyroscope method. The method for calculating the carbon emission responsibility provided by the embodiment of the invention does not require accurate train position measurement in engineering, only requires to acquire the relative position relation between all trains and a traction station, and therefore utilizes a transponder to acquire real-time train position information, wherein the real-time train position information comprises at least one of section position information of all trains and the relative position relation between all trains and the traction station.
In step S102, a node position relationship of any row line between any adjacent traction stations is established according to the real-time train position information, and a power flow of each branch and a power flow of each node are obtained according to the node position relationship and the real-time electrical information.
Specifically, based on the relative position relations between all trains and traction stations, the topological connection relation can be clarified, and then real-time tide tracking can be carried out on a direct-current traction power supply system. First, e.gAs shown in fig. 3, two traction stations (traction stations) are provided based on real-time train position informationAnd traction institute->) And (3) establishing a node position relation of a certain row line (uplink line or downlink line), wherein the node position relation is as follows:
setting a preset section tosTrain, traction stationmThe serial number of the first train adjacent to the side isjTrain serial number is directed to traction stationmThe +1 direction is sequentially increased until the traction stationmTrain number adjacent to +1 side isj+s；
Set traction stationmAnd trainjThe branch numbers between arekBranch sequence number is directed to the traction stationmThe +1 direction is sequentially increased until the traction stationmBranch number of +1 connectionk+s；
By usingRepresenting traction stationmIs>Representing a trainjIs>Representing brancheskAnd the current of (2) is:
（1）
therefore, the current of each branch can be calculated, and the power flow of each branch and each node can be obtained by solving as the voltage of each node can be directly measured, and the method is as follows:
the branch power can be calculated by calculating the branch current and measuring the node electricity, and branch is arrangedConnection nodem and />Slave nodemTo->Is +.>：
（2）
This branchIs +.>：
（3）
Through nodemIs the total inflow or outflow power of (1)：
（4）
wherein ,is node->Downstream node set of->Is node->Is set to the load power of (a). Changing the above into a matrix form:
（5）
wherein , and />Are respectively-> and />And (5) forming a vector. />Is a matrix->Is a vector, defined as follows:
（6）
（7）。
wherein ,、/>the total number of nodes of the traction station and the train is respectively.
In step S103, based on a preset power flow tracking algorithm, real-time power flow tracking is performed according to the power flow of each branch and the power flow of each node, so as to determine the carbon emission intensity of the power supply node.
Specifically, in the embodiment of the invention, the power flows of the branches and the nodes are input into a classical power flow tracking algorithm to carry out real-time power flow tracking, and the specific process is as follows:
if it is storedAt the slave nodeOutput power->Then based on (5):
（8）
wherein ,is the +.>A unit vector with elements equal to 1. Then based on (8), slave node->Output to node->Load power->Is +.>：
（9）
The above calculations describe a power flow tracking method for a direct current traction power supply system;
calculation of carbon emission flow after completion of trend tracking is performed, assuming that electric energy, power, carbon emission flow and carbon flow rate are respectively usedE、P、FAndand (3) representing. Wherein the units of electrical energy and power can be expressed in terms of kWh and MW, and the units of carbon emission flow and carbon flow rate can be expressed in terms of kgCO 2 and kgCO2 And/s. Defining a slaveThe outward flow of the nodes is the positive direction of electrical energy, power, carbon emission flow, and carbon flow rate. The carbon emission flow at a certain node represents the carbon emission liability. For example, f=1 kgCO 2 The node is considered to have shifted 1 kgCO outwards 2 Carbon emission responsibilities of (2);F=-1 kgCO 2 then the node is considered to need to assume 1 kgCO 2 Carbon emission responsibilities of (2). The carbon flow rate is the carbon emission flow versus timetIs the derivative of:
（10）
the carbon emission flow method is to calculate the carbon emission intensity of node power and branch powereI.e. how much kgCO is contained per kWh of electrical energy 2 Therefore, first, the carbon emission intensity of the power supply node is determined, and the power supply node of the direct current traction power supply system has 3 types: the method comprises the steps that an external power supply, a new energy source and a train for generating electric energy through regenerative braking are used for determining the carbon emission intensity of a power supply node through an external power grid under the condition that the power supply node is the external power supply; under the condition that the power supply node is a new energy source, the carbon emission intensity of the power supply node is zero; under the condition that the power supply node generates electric energy for regenerative braking, a train carbon emission flow model is established, and the carbon emission intensity of the power supply node is calculated through the train carbon emission flow model, wherein the train carbon emission flow model is as follows:
several trains are operated in the DC traction power supply system, assuming that for the firstiTrain of vehicles, obtain the firstiFirst total inflow electric energy of train in preset time periodE i And carbon emission streamF i Counting againiThe second total inflowing electric energy and carbon emission flows of the train between the two stations, respectively recorded asE vi AndF vi . When the train enters the station to stop, the train needs to be cleared firstlyE vi AndF vi 。
after the train is started, electric energy is required to be acquired to accelerate and overcome resistance. Assuming a carbon emission liability calculation of a time step ofThen atThe stage of electric energy inflow of the train is to continuously accumulate to count the total electric energy and total carbon emission responsibility of the electric energy inflow after the train is started:
（11）
（12）
（13）
（14）
（15）
wherein ,tdelta for the current time pointtThe time step calculated for the carbon emission liability,for presetting trainsiTotal inflowing electric energy between two stations, < >>For presetting trainsiIs used for the power of (a),E i for presetting trainsiTotal inflow electrical energy accumulated during a preset period of time, < >>For presetting trainsiTotal inflow carbon emission flow between two stations,/->For presetting trainsiCarbon rejection rate of>For presetting trainsiTotal inflow carbon emission flow accumulated during a preset period of time,/->For presetting trainsiIs determined by the carbon emission intensity of other power points.
When no more electric energy flows into the train but the train starts to flow out of the electric energy, calculating the carbon emission intensity of the train as a power source point as follows:
（16）
meanwhile, other relevant physical quantities are updated synchronously according to (11) - (15).
In step S104, the carbon emission responsibility transmitted on the branch and the carbon emission responsibility of the node are calculated according to the carbon emission intensity of the power supply node to obtain a calculation result of the carbon emission responsibility of the direct current traction power supply system for real-time operation.
Specifically, after the carbon emission intensity of the train is obtained, the carbon emission intensity of all power supply nodes is known, the carbon emission intensity of the branch and the load nodes can be calculated according to the proportion sharing principle, and the carbon emission responsibility of the load can be obtained according to the carbon emission intensity multiplied by the electricity consumption of each load.
After the train arrives again at the next station,E i andF i without treatment, clear againE vi AndF vi thereby performing calculation of the next train operation section.
It should be noted that, the method for calculating carbon emission responsibility of the direct current traction power supply system in the embodiment of the invention is not only applicable to a flexible direct current traction power supply system, but also applicable to other direct current traction power supply systems, such as a direct current traction power supply system adopting a diode rectifier unit, an energy feeding device of the diode rectifier unit and an energy router as power supply main equipment; the method is also suitable for different access modes of new energy, such as access on a direct current contact network, access at a direct current bus of a traction station and access at an alternating current side.
According to the carbon emission responsibility calculation method of the direct-current traction power supply system, a complete carbon emission responsibility calculation frame is provided aiming at a real-time operation application scene, and carbon emission responsibility accounting is realized; providing a train carbon emission flow model, so that the carbon emission flow method can consider the characteristics of energy producers and consumers of the train and calculate the carbon emission responsibility transfer during the regenerative braking of the train; the calculation method fully utilizes the common measurement conditions in engineering projects and the special topological structure of the system.
Next, a carbon emission responsibility calculation device of a direct current traction power supply system according to an embodiment of the present invention will be described with reference to the accompanying drawings.
Fig. 4 is a block diagram of a carbon emission responsibility calculation device of a direct current traction power supply system according to an embodiment of the present invention.
As shown in fig. 4, the carbon emission responsibility calculation device 10 of the direct current traction power supply system includes: the system comprises an acquisition module 100, a construction module 200, a determination module 300 and a calculation module 400.
The acquiring module 100 is configured to acquire real-time electrical information and real-time train position information of a plurality of traction stations in the direct-current traction power supply system. The construction module 200 is configured to establish a node position relationship of any row line between any adjacent traction stations according to the real-time train position information, and obtain a power flow of each branch and a power flow of each node according to the node position relationship and the real-time electrical information. The determining module 300 is configured to perform real-time power flow tracking according to the power flow of each branch and the power flow of each node based on a preset power flow tracking algorithm, so as to determine the carbon emission intensity of the power supply node. The calculation module 400 is configured to calculate the carbon emission responsibility transmitted on the branch and the carbon emission responsibility of the node according to the carbon emission intensity of the power node, so as to obtain a calculation result of the carbon emission responsibility of the dc traction power supply system for real-time operation.
Optionally, in an embodiment of the present invention, the real-time electrical information includes: the real-time train position information comprises at least one of section position information of a train and relative position relation between all trains and a traction station.
Optionally, the determining module includes:
the acquisition unit is used for acquiring the actual type of the power supply node;
the first determining unit is used for determining the carbon emission intensity of the power supply node through the external power grid under the condition that the actual type is the external power supply;
a second determining unit, configured to, in a case where the actual type is a new energy source, make the carbon emission intensity of the power supply node zero;
and the calculation unit is used for establishing a train carbon emission flow model and calculating the carbon emission intensity of the power supply node through the train carbon emission flow model under the condition that the actual type is a train generating electric energy through regenerative braking.
Optionally, the calculating unit is specifically configured to obtain a first total inflow electric energy and a carbon emission flow of the target train in a preset time period, and a second total inflow electric energy and a carbon emission flow of the target train between two stations; establishing a train carbon emission flow model by utilizing the first total inflow electric energy and the carbon emission flow and the second total inflow electric energy and the carbon emission flow, wherein the calculation formula of the train carbon emission flow model is as follows:
wherein ,for the current time point, +.>Time step calculated for carbon emission liability, +.>For presetting train->Total inflowing electric energy between two stations, < >>For presetting train->Power of->For presetting train->Total inflow electrical energy accumulated during a preset period of time, < >>For presetting train->Total inflow carbon emission flow between two stations,/->For presetting train->Carbon emission liability of->For presetting train->Total inflow carbon emission flow accumulated during a preset period of time,/->For presetting train->Node carbon emission intensity of (c).
It should be noted that the foregoing explanation of the embodiment of the method for calculating the carbon emission responsibility of the dc traction power supply system is also applicable to the device for calculating the carbon emission responsibility of the dc traction power supply system in this embodiment, and will not be repeated here.
According to the carbon emission responsibility calculation device of the direct-current traction power supply system, a complete carbon emission responsibility calculation frame is provided aiming at a real-time operation application scene, and carbon emission responsibility accounting is realized; providing a train carbon emission flow model, so that the carbon emission flow method can consider the characteristics of energy producers and consumers of the train and calculate the carbon emission responsibility transfer during the regenerative braking of the train; the calculation method fully utilizes the common measurement conditions in engineering projects and the special topological structure of the system.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or N embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "N" means at least two, for example, two, three, etc., unless specifically defined otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and additional implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order from that shown or discussed, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the N steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.

Claims (8)

1. The carbon emission responsibility calculation method of the direct current traction power supply system is characterized by comprising the following steps of:
acquiring real-time electric information and real-time train position information of a plurality of traction stations in a direct-current traction power supply system;
establishing a node position relation of any row line between any adjacent traction stations according to the real-time train position information, and obtaining the power flow of each branch and the power flow of each node according to the node position relation and the real-time electric information;
based on a preset power flow tracking algorithm, carrying out real-time power flow tracking according to the power flow of each branch and the power flow of each node so as to determine the carbon emission intensity of the power supply node;
and calculating carbon emission responsibility transmitted on the branch and carbon emission responsibility of the node according to the carbon emission intensity of the power supply node so as to obtain a carbon emission responsibility calculation result of the direct current traction power supply system for real-time operation.
2. The method for calculating carbon emission liability of a direct current traction power supply system according to claim 1, wherein the real-time electrical information comprises: at least one of the voltages of a plurality of traction stations DC side ports in the DC traction power supply system, the on-line feeder current of a traction station on a traction network, all train voltage information and all train current information; the real-time train position information includes at least one of zone position information of all trains and a relative positional relationship between all trains and a traction station.
3. The method for calculating carbon emission liability of a direct current traction power supply system according to claim 1, wherein said determining the carbon emission intensity of the power supply node comprises:
acquiring the actual type of the power supply node;
under the condition that the actual type is an external power supply, determining the carbon emission intensity of the power supply node through an external power grid;
under the condition that the actual type is new energy, the carbon emission intensity of the power supply node is zero;
and under the condition that the actual type is a train generating electric energy through regenerative braking, establishing a train carbon emission flow model, and calculating the carbon emission intensity of the power supply node through the train carbon emission flow model.
4. The method for calculating carbon emission liability of a direct current traction power supply system according to claim 3, wherein said establishing a train carbon emission flow model, calculating the carbon emission intensity of the power supply node by the train carbon emission flow model, comprises:
acquiring a first total inflow electric energy and a carbon emission flow of a target train in a preset time period, and a second total inflow electric energy and a carbon emission flow of the target train between two stations;
establishing the train carbon emission flow model by utilizing the first total inflow electric energy and the carbon emission flow and the second total inflow electric energy and the carbon emission flow, wherein a calculation formula of the train carbon emission flow model is as follows:
wherein ,for the current time point, +.>Time step calculated for carbon emission liability, +.>For presetting train->Total inflowing electric energy between two stations, < >>For presetting train->Power of->For presetting train->Total inflow electrical energy accumulated during a preset period of time, < >>For presetting train->Total inflow carbon emission flow between two stations,/->For presetting train->Carbon emission liability of->Is preset toTrain->Total inflow carbon emission flow accumulated during a preset period of time,/->For presetting train->Node carbon emission intensity of (c).
5. A carbon emission liability calculation device for a direct current traction power supply system, comprising:
the acquisition module is used for acquiring real-time electric information and real-time train position information of a plurality of traction stations in the direct-current traction power supply system;
the construction module is used for establishing a node position relation of any row line between any adjacent traction stations according to the real-time train position information, and obtaining the power flow of each branch and the power flow of each node according to the node position relation and the real-time electric information;
the determining module is used for carrying out real-time power flow tracking according to the power flow of each branch and the power flow of each node based on a preset power flow tracking algorithm so as to determine the carbon emission intensity of the power supply node;
and the calculation module is used for calculating the carbon emission responsibility transmitted on the branch and the carbon emission responsibility of the node according to the carbon emission intensity of the power supply node so as to obtain a carbon emission responsibility calculation result of the direct current traction power supply system for running in real time.
6. The direct current traction power supply system carbon emission liability calculation device according to claim 5, wherein the real-time electrical information comprises: the real-time train position information comprises at least one of section position information of a train and relative position relations between all trains and a traction station.
7. The direct current traction power supply system carbon emission liability calculation device according to claim 5, wherein the determination module comprises:
the acquisition unit is used for acquiring the actual type of the power supply node;
the first determining unit is used for determining the carbon emission intensity of the power supply node through an external power grid under the condition that the actual type is the external power supply;
a second determining unit, configured to, in a case where the actual type is a new energy source, make the carbon emission intensity of the power supply node zero;
and the calculation unit is used for establishing a train carbon emission flow model and calculating the carbon emission intensity of the power supply node through the train carbon emission flow model under the condition that the actual type is a train generating electric energy through regenerative braking.
8. The device for calculating the carbon emission liability of a direct current traction power supply system according to claim 7, wherein the calculating unit is specifically configured to:
acquiring a first total inflow electric energy and a carbon emission flow of a target train in a preset time period, and a second total inflow electric energy and a carbon emission flow of the target train between two stations; establishing the train carbon emission flow model by utilizing the first total inflow electric energy and the carbon emission flow and the second total inflow electric energy and the carbon emission flow, wherein a calculation formula of the train carbon emission flow model is as follows:
wherein ,for the current time point, +.>Time step calculated for carbon emission liability, +.>For presetting train->Total inflowing electric energy between two stations, < >>For presetting train->Power of->For presetting train->Total inflow electrical energy accumulated during a preset period of time, < >>For presetting train->Total inflow carbon emission flow between two stations,/->For presetting train->Carbon emission liability of->For presetting train->Total inflow carbon emission flow accumulated during a preset period of time,/->For presetting train->Node carbon emission intensity of (c).
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