Method and device for calculating carbon emission of electric power system

Abstract

The invention provides a power system carbon emission calculation method and device, and relates to the technical field of energy conservation and emission reduction. The method comprises the following steps: performing time sequence production analog simulation on a power system to obtain related parameters of carbon emission tracking calculation of the power system; determining a carbon emission factor according to the related parameters; and performing carbon emission tracking calculation according to the related parameters and the carbon emission factors to obtain a carbon emission calculation result. The device executes the method. According to the power system carbon emission calculation method and device provided by the embodiment of the invention, the power system carbon emission can be comprehensively, accurately and timely calculated.

Description

Technical Field

[0001] The present invention relates to the technical field of energy conservation and emission reduction, and in particular to a method and device for calculating carbon emissions of an electric power system. Background Art

[0002] In order to achieve the goal of energy conservation and emission reduction, it is particularly important to track the carbon emissions of each link of the power system, including source, network, load and energy storage, in real time.

[0003] Energy storage is an important part of the development of new power systems. It is necessary to consider the impact of the time series charging and discharging characteristics of energy storage on carbon emission tracking. At present, the industry generally only tracks the carbon emission flow from the power supply side, without considering the spatial and temporal transfer characteristics of the carbon emissions of each power source by the energy storage equipment during actual operation, nor the carbon distribution caused by the efficiency loss of the energy storage equipment itself. Therefore, it is impossible to reveal the changes in the spatial and temporal distribution of carbon flow in the power grid, and thus it is impossible to comprehensively, accurately and timely calculate the carbon emissions of the power system. Summary of the invention

[0004] In view of the problems in the prior art, an embodiment of the present invention provides a method and device for calculating carbon emissions of an electric power system, which can at least partially solve the problems in the prior art.

[0005] In one aspect, the present invention provides a method for calculating carbon emissions of a power system, comprising:

[0006] Conduct time-series production simulation on the power system to obtain relevant parameters for carbon emission tracking calculation of the power system;

[0007] Determining a carbon emission factor based on the relevant parameters;

[0008] Carbon emission tracking calculation is performed according to the relevant parameters and the carbon emission factor to obtain a carbon emission calculation result.

[0009] Wherein, determining the carbon emission factor according to the relevant parameters includes:

[0010] According to the pre-established correspondence between unit power and carbon emissions, the carbon emission factor corresponding to the power generation power of each generator unit in period t and the carbon emission factor corresponding to the discharge power of each energy storage unit in period t are determined.

[0011] The carbon emission tracking calculation is performed according to the relevant parameters and the carbon emission factor to obtain the carbon emission calculation result, including:

[0012] Calculate the power contribution value of each generator set to each load in time period t according to the relevant parameters, and calculate the power contribution value of each energy storage unit to each load in time period t according to the relevant parameters;

[0013] Multiply the power contribution value of each generator set to each load in period t by the carbon emission factor corresponding to the power generation of each generator set in period t, and add up the multiplication results to obtain a first calculation result;

[0014] The power contribution value of each energy storage unit to each load in period t is multiplied by the carbon emission factor corresponding to the discharge power of each energy storage unit in period t, and the multiplication results are accumulated to obtain a second calculation result;

[0015] The first calculation result and the second calculation result are added together to obtain the carbon emission apportionment of each node load.

[0016] The carbon emission tracking calculation is performed according to the relevant parameters and the carbon emission factor to obtain the carbon emission calculation result, including:

[0017] Calculate the power contribution value of each generator set to each energy storage set during time period t according to the relevant parameters;

[0018] Multiply the power contribution value of each generator set to each energy storage set during period t by the carbon emission factor corresponding to the power generation power of each generator set during period t, and add up the multiplication results to obtain the equivalent load carbon emission share of the energy storage.

[0019] The carbon emission tracking calculation is performed according to the relevant parameters and the carbon emission factor to obtain the carbon emission calculation result, including:

[0020] Calculate the power contribution value of each generator set to each energy storage set during time period t according to the relevant parameters;

[0021] According to the power contribution value of each generator set to each energy storage unit in period t and the carbon emission factor corresponding to the power generation power of each generator set in period t, the equivalent carbon emission factor of each energy storage unit in period t+1 is calculated;

[0022] According to the relevant parameters and the equivalent carbon emission factors of each energy storage unit in time period t+1, the equivalent power source carbon emission apportionment of the energy storage is calculated.

[0023] The method for calculating carbon emissions of the power system further includes:

[0024] The carbon emissions of each generator set are obtained by multiplying the power generation of each generator set in period t by the carbon emission factor corresponding to the power generation of each generator set in period t.

[0025] The step of simulating the time-series production of the power system includes:

[0026] Conduct time-series production simulation of power systems based on safety constraints;

[0027] The safety constraint conditions are obtained according to a pre-constructed charging and discharging constraint model of energy storage.

[0028] In one aspect, the present invention provides a device for calculating carbon emissions of a power system, comprising:

[0029] A simulation unit is used to simulate the time-series production of the power system and obtain relevant parameters for carbon emission tracking calculation of the power system;

[0030] A determination unit, used to determine a carbon emission factor according to the relevant parameters;

[0031] The calculation unit is used to perform carbon emission tracking calculation according to the relevant parameters and the carbon emission factor to obtain a carbon emission calculation result.

[0032] The determining unit is specifically used for:

[0033] According to the pre-established correspondence between unit power and carbon emissions, the carbon emission factor corresponding to the power generation power of each generator unit in period t and the carbon emission factor corresponding to the discharge power of each energy storage unit in period t are determined.

[0034] Wherein, the computing unit is specifically used for:

[0035] Calculate the power contribution value of each generator set to each load in time period t according to the relevant parameters, and calculate the power contribution value of each energy storage unit to each load in time period t according to the relevant parameters;

[0036] Multiply the power contribution value of each generator set to each load in period t by the carbon emission factor corresponding to the power generation of each generator set in period t, and add up the multiplication results to obtain a first calculation result;

[0037] The power contribution value of each energy storage unit to each load in period t is multiplied by the carbon emission factor corresponding to the discharge power of each energy storage unit in period t, and the multiplication results are accumulated to obtain a second calculation result;

[0038] The first calculation result and the second calculation result are added together to obtain the carbon emission apportionment of each node load.

[0039] Wherein, the computing unit is specifically used for:

[0040] Calculate the power contribution value of each generator set to each energy storage set during time period t according to the relevant parameters;

[0041] Multiply the power contribution value of each generator set to each energy storage set during period t by the carbon emission factor corresponding to the power generation power of each generator set during period t, and add up the multiplication results to obtain the equivalent load carbon emission share of the energy storage.

[0042] Wherein, the computing unit is specifically used for:

[0043] Calculate the power contribution value of each generator set to each energy storage set during time period t according to the relevant parameters;

[0044] According to the power contribution value of each generator set to each energy storage unit in period t and the carbon emission factor corresponding to the power generation power of each generator set in period t, the equivalent carbon emission factor of each energy storage unit in period t+1 is calculated;

[0045] According to the relevant parameters and the equivalent carbon emission factors of each energy storage unit in time period t+1, the equivalent power source carbon emission apportionment of the energy storage is calculated.

[0046] The power system carbon emissions calculation device is also used for:

[0047] The carbon emissions of each generator set are obtained by multiplying the power generation of each generator set in period t by the carbon emission factor corresponding to the power generation of each generator set in period t.

[0048] Wherein, the simulation unit is specifically used for:

[0049] Conduct time-series production simulation of power systems based on safety constraints;

[0050] The safety constraint conditions are obtained according to a pre-constructed charging and discharging constraint model of energy storage.

[0051] In another aspect, an embodiment of the present invention provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the following method when executing the computer program:

[0052] Conduct time-series production simulation on the power system to obtain relevant parameters for carbon emission tracking calculation of the power system;

[0053] Determining a carbon emission factor based on the relevant parameters;

[0054] Carbon emission tracking calculation is performed according to the relevant parameters and the carbon emission factor to obtain a carbon emission calculation result.

[0055] An embodiment of the present invention provides a computer-readable storage medium, including:

[0056] The computer readable storage medium stores a computer program, and when the computer program is executed by a processor, the following method is implemented:

[0057] Conduct time-series production simulation on the power system to obtain relevant parameters for carbon emission tracking calculation of the power system;

[0058] Determining a carbon emission factor based on the relevant parameters;

[0059] Carbon emission tracking calculation is performed according to the relevant parameters and the carbon emission factor to obtain a carbon emission calculation result.

[0060] The method and device for calculating carbon emissions of an electric power system provided in an embodiment of the present invention perform a time-series production simulation on the electric power system to obtain relevant parameters for tracking and calculating the carbon emissions of the electric power system; determine a carbon emission factor based on the relevant parameters; perform carbon emission tracking calculation based on the relevant parameters and the carbon emission factor to obtain a carbon emissions calculation result, and can comprehensively, accurately and timely calculate the carbon emissions of the electric power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0062] Figure 1 It is a flow chart of a method for calculating carbon emissions of a power system provided in one embodiment of the present invention.

[0063] Figure 2 It is a flowchart of a method for calculating carbon emissions of a power system provided by another embodiment of the present invention.

[0064] Figure 3 It is a timing power characteristic diagram of charging and discharging of an independent energy storage device within a single day provided by an embodiment of the present invention.

[0065] Figure 4 It is a schematic diagram of the structure of a device for calculating carbon emissions of a power system provided by an embodiment of the present invention.

[0066] Figure 5 A schematic diagram of the physical structure of a computer device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0067] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention. It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other arbitrarily.

[0068] Figure 1FIG. 1 is a flow chart of a method for calculating carbon emissions of a power system provided by an embodiment of the present invention. Figure 1 As shown, the method for calculating carbon emissions of a power system provided by an embodiment of the present invention includes:

[0069] Step S1: Perform time-series production simulation on the power system to obtain relevant parameters for carbon emission tracking calculation of the power system.

[0070] Step S2: Determine the carbon emission factor according to the relevant parameters.

[0071] Step S3: Perform carbon emission tracking calculation according to the relevant parameters and the carbon emission factor to obtain a carbon emission calculation result.

[0072] In the above step S1, the device performs a time-series production simulation on the power system to obtain relevant parameters for carbon emission tracking calculation of the power system. The device can be a computer device that executes the method, such as a server. The acquisition, storage, use, and processing of data in the technical solution of this application are in compliance with relevant regulations.

[0073] The time-series production simulation of the power system includes:

[0074] Conduct time-series production simulation of power systems based on safety constraints;

[0075] The safety constraint conditions are obtained according to a pre-constructed charging and discharging constraint model of energy storage.

[0076] like Figure 2 As shown, before the step of performing a sequential production simulation based on safety constraints on the power system, detailed parameter information of the power supply side, grid side, load side and independent energy storage of the power system can be obtained.

[0077] The charging and discharging constraint model of energy storage is constructed based on the detailed parameter information, as follows:

[0078] Determine the type, installed capacity, maximum charging power, maximum discharging power, minimum charging power, minimum discharging power, and charge and discharge cycle efficiency parameters of independent energy storage.

[0079] Construct the operation characteristic model and constraint conditions of energy storage, including:

[0080]

[0081] In the formula, K S is the energy storage set; p k,t Contribute to energy storage; are the energy storage discharge and charging power respectively; η ch and ηdc are charging efficiency and discharging efficiency respectively; e k,t u1 is the energy storage capacity; k,t Power generation 0-1 variable for energy storage unit; and They are the upper and lower limits of energy storage discharge power respectively; K S0 For pumped storage collection; u2 k,t Charge the energy storage unit 0-1 variable; and are the upper and lower limits of energy storage charging power respectively, and They are the upper and lower limits of energy storage capacity respectively.

[0082] It should be noted that due to its operating principle, the charging power of the pumped storage unit in a single period can only be zero or the maximum charging power, so the charging equation constraint is set only for the pumped storage unit. In addition, since the storage energy cannot work in the charging and discharging states at the same time, u1 is set k,t 、u2 k,t Two discharge and charge 0-1 variables are used to ensure the correctness of the model.

[0083] The timing production simulation of the power system based on safety constraints is as follows:

[0084] Set up a power system timing production simulation model considering independent energy storage and establish corresponding constraints.

[0085] Run the model and obtain the time series power flow of the power system, the time series power output of the thermal power units, and the time series charging and discharging power of the independent energy storage.

[0086] The power system timing production simulation model considering independent energy storage is as follows:

[0087] Objective function:

[0088]

[0089] In the above formula, p th,i,t,b is the output of the generator set in power section b during period t, is the electricity energy cost of power segment b of thermal power unit i in period t.

[0090] It should be noted that since the charging and discharging costs of independent energy storage and the power generation output costs of new energy can be ignored, this model is constructed based on the minimization of thermal power generation costs. And thermal power generation unit i includes all coal-fired and gas-fired units connected to the power system.

[0091] Constraints:

[0092] Output upper and lower limits of thermal power units:

[0093]

[0094] In the above formula, is the lower limit of the output of power stage b of thermal power unit i during period t, It is the upper limit of the output of power segment b of thermal power unit i in period t.

[0095] Total output constraints of thermal power units:

[0096]

[0097] In the above formula, p th,i,t It is the total output of thermal power unit i in period t (the power generation power of each generator unit in period t), that is, the sum of each power section.

[0098] Constraints on the up and down ramp rates of thermal power units:

[0099] p th,i,t-1 -p th,i,t ≤RD th,i

[0100] p th,i,t -p th,i,t-1 ≤RU th,i

[0101] In the above formula, RD th,i is the ramp rate of thermal power unit i, RU th,i is the ramp rate of thermal power unit i.

[0102] System-wide power balance constraints:

[0103]

[0104] In the above formula, I is the set of generator sets in the power system, V is the set of new energy units in the power system, K is the set of energy storage units in the power system, and p renew,v,t The output of the new energy unit v during period t, is the discharge power of energy storage unit k during period t, is the charging power of energy storage unit k during period t, Load t is the total system load during period t.

[0105] Transmission line safety constraints:

[0106]

[0107] In the above formula, Shift l,i,t is the transfer factor of the i generation side node to the l line in period t, l,j,t is the transfer factor of load-side node j to line l in period t, p i,t is the input power of the node i on the generation side during period t, pj,t is the output power of the load side node j in period t, is the lower limit of the transmission power of line l in period t, is the upper limit of the transmission power of line l in period t.

[0108] Output limit constraints for new energy units:

[0109]

[0110] In the above formula v is the upper limit of the output of the new energy unit in period t, and the lower limit of the output of the new energy unit is 0.

[0111] After running the model, relevant parameters for carbon emission tracking calculation of the power system can be obtained, including but not limited to the time series power flow of the power system, the time series power output of thermal power units, and the time series charging and discharging power of independent energy storage.

[0112] In the above step S2, the device determines the carbon emission factor according to the relevant parameters.

[0113] Determining the carbon emission factor according to the relevant parameters includes:

[0114] According to the pre-established correspondence between unit power and carbon emissions, the carbon emission factor (EF i,t ) and the carbon emission factor (EF k,t ).

[0115] The flow of carbon emissions in the power system depends on the line flow. Therefore, the method of the present invention transforms the carbon emission flow tracking problem into a flow tracking problem. For each unit, there is a carbon emission factor, which is used to establish the relationship between the unit power and the carbon emissions per unit time. The relationship between the unit and the load is obtained according to the upstream tracking algorithm to complete the carbon emission flow tracking.

[0116] In the above step S3, the device performs carbon emission tracking calculation according to the relevant parameters and the carbon emission factor to obtain a carbon emission calculation result.

[0117] The power contribution values ​​expressed by various contribution expressions can be calculated based on the relevant parameters, including:

[0118] The expression of each unit's contribution to the power flowing into each node is established as follows:

[0119] I is the set of generator sets in the power system, J is the set of load-side nodes, and considering that the calculation formula for all time periods is the same, the time period subscript t is omitted here.

[0120] Based on the known power system flow, the total flow P flowing through node I I (can refer to the total flow into a node or the total flow out of a node), when viewed from the perspective of the inflow flow, it can be expressed as:

[0121]

[0122] In the formula, represents the set of nodes directly connected to node I (the flow can flow to node i through adjacent lines), P I-J represents the power flow through line JI to node i, P Gi is the column vector of the power injected by the generator set at each node. In the formula, the line loss has been eliminated, and |P I-J |=|P J-I |. (Here IJ does not refer to all lines directly connected to node I, but the lines whose power direction is to flow into node I).

[0123] This formula is consistent with the total power flow P flowing through node J J Related, can be modified to |P I-J |=c JI P J , where c JI =

[0124] |P J-I | / P J , we can get:

[0125]

[0126] Rearrangements include:

[0127]

[0128] In the formula, O u is an n×n-order upstream distribution matrix, P is the column vector of the total flow into the node, P Gi is the column vector of the power injected by each node generator set. Matrix A u The elements of are:

[0129]

[0130] It should be noted that the matrix A u is sparse and asymmetric. If its inverse matrix If exists, then there is

[0131] For the Ith node, we have:

[0132]

[0133] This equation shows that the power contribution of the i-th unit in the system to the i-th node is equal to

[0134]

[0135] Based on the principle of proportional sharing, the expression of contribution of each unit to the power flow of each line is established, as follows:

[0136] For the outflow power from node I through line IJ, the outflow power can therefore be calculated by the proportional sharing principle, as follows:

[0137]

[0138] In the formula, represents the set of nodes directly supplied with power by node I. This equation will Defined as the generator topology allocation factor, this factor represents the contribution ratio of the i-th unit to the line IJ. The generator topology allocation factors are based on the topological analysis of the power flow in the network and represent the share of a specific generator unit in the total line power flow. Therefore, they are always positive.

[0139] The contribution expression of each unit to the load demand power is established as follows:

[0140] Load power requirement P j From P Gi Calculated in, the formula is as follows:

[0141]

[0142] This equation shows that the contribution of the i-th generator set to the j-th load demand power is equal to And it can be used to track the source of contribution to a specific load power. It should be noted that to indicate P I It is also equivalent to the load power P at node I j And the sum of the outflow power from node i through the adjacent lines, so:

[0143]

[0144] In the above formula, EL i,j is the power contribution of the i-th generator set to the j-th load.

[0145] According to the above calculation method, the carbon emission distribution relationship on each bus of the whole system from the power generation side can be obtained, that is, the transmission of carbon emissions from the power generation side to the load side is completed.

[0146] The calculation of carbon emissions is explained as follows:

[0147] The method for calculating carbon emissions of the power system also includes:

[0148] Multiply the power generation of each generator set in period t by the carbon emission factor corresponding to the power generation of each generator set in period t to obtain the carbon emissions of each generator set. This step realizes the calculation of the carbon emissions of each thermal power unit, as follows:

[0149] Carbon i,t =P th,i,t ·EF i (P th,i,t )

[0150] In the above formula, Carbon i,t represents the carbon emissions of thermal power unit i during period t, P th,i,t is the power generation of thermal power unit in period i, EF i (P th,i,t ) is the thermal power unit i in P th,i,t Carbon emission factor when generating power, i.e. EF i,t .

[0151] The carbon emission tracking calculation is performed according to the relevant parameters and the carbon emission factor to obtain the carbon emission calculation result, including:

[0152] Calculate the power contribution value of each generator set to each energy storage set during time period t according to the relevant parameters;

[0153] Multiply the power contribution value of each generator set to each energy storage set in period t by the carbon emission factor corresponding to the power generation of each generator set in period t, and add up the multiplication results to obtain the equivalent load carbon emission apportionment of energy storage. This step realizes the calculation of the equivalent load carbon emission apportionment of energy storage, as explained below:

[0154] When the energy storage is in the charging state, it is equivalent to a load for carbon emission calculation. The specific processing method is as follows: Assuming that in time period t, the energy storage device is put into operation, the initial electric energy is 0. According to the principle of supply and demand balance, without considering network losses, the sum of the outflow carbon emissions of the bus where the energy storage unit is located and the carbon emissions injected into the energy storage by the network node should be equal to the sum of the inflow carbon emissions. At this time, the bus where the energy storage unit is located is regarded as a load node. After the flow calculation, the carbon emissions stored by the energy storage unit can be calculated by the following formula:

[0155]

[0156]

[0157] Carbon k,t represents the carbon emissions of energy storage unit k during period t, is the charging efficiency of the k energy storage unit, EL i,k,t It represents the power contribution value of thermal power unit i to energy storage unit k during period t, is the charging power of energy storage unit k during period t.

[0158] If the loss during charging is not taken into account, all the electric energy injected into the energy storage is stored in the energy storage device and does not leave the power system. Carbon emissions can also be regarded as transferred and stored in the energy storage device. However, there is charging efficiency in the actual operation of energy storage. Therefore, the real carbon emissions of energy storage are caused by charging losses.

[0159] The actual carbon allocation when energy storage is charged is:

[0160]

[0161] The carbon emission tracking calculation is performed according to the relevant parameters and the carbon emission factor to obtain the carbon emission calculation result, including:

[0162] Calculate the power contribution value of each generator set to each energy storage set during time period t according to the relevant parameters;

[0163] According to the power contribution value of each generator set to each energy storage unit in period t and the carbon emission factor corresponding to the power generation power of each generator set in period t, the equivalent carbon emission factor of each energy storage unit in period t+1 is calculated;

[0164] According to the relevant parameters and the equivalent carbon emission factors of each energy storage unit in the t+1 period, the equivalent power carbon emission apportionment of the energy storage is calculated. This step realizes the calculation of the equivalent power carbon emission apportionment of the energy storage, which is explained as follows:

[0165] Assuming that in the period t+1, the energy storage device turns to discharge, it can be regarded as a generator set. However, unlike a real generator set, the carbon emissions of the energy storage device in the discharge state are derived from the carbon emissions of each thermal power unit in the period t. Therefore, the carbon emissions of the energy storage device in the period t+1 are:

[0166]

[0167]

[0168] Carbon k,t+1 represents the carbon emissions of the k energy storage unit in period t+1, is the discharge efficiency of the k energy storage unit, EE k,t+1 is the equivalent carbon emission factor of the k energy storage unit in period t+1, is the discharge power of energy storage unit k during period t+1, EL i,k,t It represents the power contribution of thermal power unit i to energy storage unit k during period t.

[0169] The actual carbon allocation when energy storage is discharged is:

[0170]

[0171] Energy storage behaves as a load when charging and as a generator when discharging, but in fact both properties are reflected in the whole process, which is manifested in that the equivalent carbon emission values ​​when charging at different time periods will change with the changes in the output and combination of the random group, and that there is a loss of electrical energy and the resulting carbon emissions in both the charging and discharging stages.

[0172] The carbon emission tracking calculation is performed according to the relevant parameters and the carbon emission factor to obtain the carbon emission calculation result, including:

[0173] Calculate the power contribution value of each generator set to each load in time period t according to the relevant parameters, and calculate the power contribution value of each energy storage unit to each load in time period t according to the relevant parameters;

[0174] Multiply the power contribution value of each generator set to each load in period t by the carbon emission factor corresponding to the power generation of each generator set in period t, and add up the multiplication results to obtain a first calculation result;

[0175] The power contribution value of each energy storage unit to each load in period t is multiplied by the carbon emission factor corresponding to the discharge power of each energy storage unit in period t, and the multiplication results are accumulated to obtain a second calculation result;

[0176] The first calculation result and the second calculation result are added together to obtain the carbon emission apportionment of each node load. This step realizes the calculation of the carbon emission apportionment of each node load, as described below:

[0177]

[0178] In the above formula, Carbon j,t is the carbon emission allocation of load j in period t, EL i,j,t Indicates the power contribution of generator set i to load j during period t, EL k,j,t represents the power contribution of energy storage unit k to load j during period t, EF k,t represents the carbon emission factor corresponding to the discharge power of energy storage unit k during period t, EF i,t Represents the carbon emission factor corresponding to the power generation of generator set i during period t.

[0179] The carbon emissions of each thermal power unit, the equivalent load carbon emissions apportionment of energy storage, the equivalent power source carbon emissions apportionment of energy storage and the carbon emissions apportionment of each node load calculated above can be summarized and sorted to obtain the calculation result of the carbon emissions of the power system.

[0180] The method for calculating carbon emissions of a power system provided by an embodiment of the present invention fully considers the impact of energy storage charging and discharging characteristics on carbon flow, and characterizes the time and space transfer characteristics of carbon in energy storage. First, the method uses the construction of a regional power system long-period time series production simulation model to calculate the output power of the thermal power unit on the power generation side, the charging and discharging power of the energy storage, and the power flow of the power grid line in the time series. Afterwards, the charging and discharging process of the energy storage is equivalent to the process of load consumption of carbon and power supply release of carbon, and carbon emission models are established to calculate their carbon emission consumption. And a carbon emission calculation model for thermal power is established. Finally, a method for tracking the carbon emission flow of a power system in all links and in all time series considering the charging and discharging characteristics of independent energy storage is designed. The power flow tracking model is adopted, and based on the principle of proportional sharing, the power generation contribution of each thermal power unit on the power generation side is transmitted to the power consumption on the load side and the independent energy storage unit. This method helps decision makers determine the carbon emission responsibility of electricity consumption on the user side, takes into account the carbon emissions on the energy storage unit, and improves the accuracy of locating the source of carbon emissions and the rationality of quantifying the carbon emission responsibility.

[0181] like Figure 3 As shown, this is a timing power characteristic diagram of charging and discharging of independent energy storage within a single day.

[0182] The method for calculating carbon emissions of a power system provided in an embodiment of the present invention performs a time-series production simulation on the power system to obtain relevant parameters for tracking and calculating the carbon emissions of the power system; determines a carbon emission factor based on the relevant parameters; performs a carbon emission tracking calculation based on the relevant parameters and the carbon emission factor to obtain a carbon emissions calculation result, which can comprehensively, accurately and timely calculate the carbon emissions of the power system.

[0183] Furthermore, determining the carbon emission factor according to the relevant parameters includes:

[0184] According to the pre-established correspondence between unit power and carbon emissions, the carbon emission factor corresponding to the power generation of each generator unit in period t and the carbon emission factor corresponding to the discharge power of each energy storage unit in period t are determined. The above embodiments can be referred to for explanation and will not be repeated here.

[0185] Furthermore, the carbon emission tracking calculation is performed according to the relevant parameters and the carbon emission factor to obtain the carbon emission calculation result, including:

[0186] The power contribution value of each generator set to each load in time period t is calculated according to the relevant parameters, and the power contribution value of each energy storage set to each load in time period t is calculated according to the relevant parameters; the description can be made with reference to the above embodiment and will not be repeated here.

[0187] The power contribution value of each generator set to each load in period t is multiplied by the carbon emission factor corresponding to the power generation power of each generator set in period t, and the multiplication results are accumulated to obtain the first calculation result; the above embodiment can be referred to for description and will not be repeated here.

[0188] The power contribution value of each energy storage unit to each load in period t is multiplied by the carbon emission factor corresponding to the discharge power of each energy storage unit in period t, and the multiplication results are accumulated to obtain a second calculation result; the above embodiment can be referred to for description and will not be repeated here.

[0189] The first calculation result and the second calculation result are added together to obtain the carbon emission apportionment of each node load.

[0190] Furthermore, the carbon emission tracking calculation is performed according to the relevant parameters and the carbon emission factor to obtain the carbon emission calculation result, including:

[0191] The power contribution value of each generator set to each energy storage set during time period t is calculated according to the related parameters; the description may refer to the above embodiment and will not be repeated here.

[0192] The power contribution value of each generator set to each energy storage set in period t is multiplied by the carbon emission factor corresponding to the power generation power of each generator set in period t, and the multiplication results are accumulated to obtain the equivalent load carbon emission apportionment of energy storage. The above-mentioned embodiment can be referred to for explanation and will not be repeated here.

[0193] Furthermore, the carbon emission tracking calculation is performed according to the relevant parameters and the carbon emission factor to obtain the carbon emission calculation result, including:

[0194] The power contribution value of each generator set to each energy storage set during time period t is calculated according to the related parameters; the description may refer to the above embodiment and will not be repeated here.

[0195] According to the power contribution value of each generator set to each energy storage set during period t and the carbon emission factor corresponding to the power generation power of each generator set during period t, the equivalent carbon emission factor of each energy storage set during period t+1 is calculated; the above-mentioned embodiment can be referred to for explanation and will not be repeated here.

[0196] According to the relevant parameters and the equivalent carbon emission factors of each energy storage unit in the t+1 period, the equivalent power carbon emission apportionment of the energy storage is calculated. The above-mentioned embodiments can be referred to for explanation and will not be described in detail.

[0197] Furthermore, the method for calculating carbon emissions of the power system also includes:

[0198] The carbon emissions of each generator set are obtained by multiplying the power generated by each generator set in period t by the carbon emission factor corresponding to the power generated by each generator set in period t. The above description can be referred to and will not be repeated here.

[0199] Furthermore, the time-series production simulation of the power system includes:

[0200] A time-series production simulation based on safety constraints is performed on the power system; the above-mentioned embodiments can be referred to for description and will not be repeated here.

[0201] The safety constraint condition is obtained according to a pre-constructed energy storage charge and discharge constraint model. The above-mentioned embodiment can be referred to for explanation and will not be described in detail.

[0202] Figure 4 FIG. 1 is a schematic diagram of a device for calculating carbon emissions of a power system according to an embodiment of the present invention. Figure 4 As shown, the power system carbon emissions calculation device provided by the embodiment of the present invention includes a simulation unit 401, a determination unit 402 and a calculation unit 403, wherein:

[0203] The simulation unit 401 is used to perform time-series production simulation on the power system to obtain relevant parameters for carbon emission tracking calculation of the power system; the determination unit 402 is used to determine the carbon emission factor according to the relevant parameters; the calculation unit 403 is used to perform carbon emission tracking calculation according to the relevant parameters and the carbon emission factor to obtain the carbon emission calculation result.

[0204] Specifically, the simulation unit 401 is used to perform time-series production simulation on the power system to obtain relevant parameters for carbon emission tracking calculation of the power system; the determination unit 402 is used to determine the carbon emission factor according to the relevant parameters; the calculation unit 403 is used to perform carbon emission tracking calculation according to the relevant parameters and the carbon emission factor to obtain the carbon emission calculation result.

[0205] The device for calculating carbon emissions of a power system provided in an embodiment of the present invention performs a time-series production simulation on the power system to obtain relevant parameters for tracking and calculating the carbon emissions of the power system; determines a carbon emission factor based on the relevant parameters; performs a carbon emission tracking calculation based on the relevant parameters and the carbon emission factor to obtain a carbon emissions calculation result, and can comprehensively, accurately and timely calculate the carbon emissions of the power system.

[0206] Further, the determining unit 402 is specifically configured to:

[0207] According to the pre-established correspondence between unit power and carbon emissions, the carbon emission factor corresponding to the power generation power of each generator unit in period t and the carbon emission factor corresponding to the discharge power of each energy storage unit in period t are determined.

[0208] Furthermore, the calculation unit 403 is specifically used for:

[0209] Calculate the power contribution value of each generator set to each load in time period t according to the relevant parameters, and calculate the power contribution value of each energy storage unit to each load in time period t according to the relevant parameters;

[0210] Multiply the power contribution value of each generator set to each load in period t by the carbon emission factor corresponding to the power generation of each generator set in period t, and add up the multiplication results to obtain a first calculation result;

[0211] The power contribution value of each energy storage unit to each load in period t is multiplied by the carbon emission factor corresponding to the discharge power of each energy storage unit in period t, and the multiplication results are accumulated to obtain a second calculation result;

[0212] The first calculation result and the second calculation result are added together to obtain the carbon emission apportionment of each node load.

[0213] Furthermore, the calculation unit 403 is specifically used for:

[0214] Calculate the power contribution value of each generator set to each energy storage set during time period t according to the relevant parameters;

[0215] Multiply the power contribution value of each generator set to each energy storage set during period t by the carbon emission factor corresponding to the power generation power of each generator set during period t, and add up the multiplication results to obtain the equivalent load carbon emission share of the energy storage.

[0216] Furthermore, the calculation unit 403 is specifically used for:

[0217] Calculate the power contribution value of each generator set to each energy storage set during time period t according to the relevant parameters;

[0218] According to the power contribution value of each generator set to each energy storage unit in period t and the carbon emission factor corresponding to the power generation power of each generator set in period t, the equivalent carbon emission factor of each energy storage unit in period t+1 is calculated;

[0219] According to the relevant parameters and the equivalent carbon emission factors of each energy storage unit in time period t+1, the equivalent power source carbon emission apportionment of the energy storage is calculated.

[0220] Furthermore, the power system carbon emissions calculation device is also used for:

[0221] The carbon emissions of each generator set are obtained by multiplying the power generation of each generator set in period t by the carbon emission factor corresponding to the power generation of each generator set in period t.

[0222] Furthermore, the simulation unit 401 is specifically used for:

[0223] Conduct time-series production simulation of power systems based on safety constraints;

[0224] The safety constraint conditions are obtained according to a pre-constructed charging and discharging constraint model of energy storage.

[0225] The embodiment of the present invention provides an embodiment of a power system carbon emission calculation device which can be specifically used to execute the processing flow of the above-mentioned method embodiments. Its functions are not repeated here, and reference can be made to the detailed description of the above-mentioned method embodiments.

[0226] Figure 5 A schematic diagram of the physical structure of a computer device provided in an embodiment of the present invention is shown in FIG. Figure 5 As shown, the computer device includes: a memory 501, a processor 502, and a computer program stored in the memory 501 and executable on the processor 502. When the processor 502 executes the computer program, the following method is implemented:

[0227] Conduct time-series production simulation on the power system to obtain relevant parameters for carbon emission tracking calculation of the power system;

[0228] Determining a carbon emission factor based on the relevant parameters;

[0229] Carbon emission tracking calculation is performed according to the relevant parameters and the carbon emission factor to obtain a carbon emission calculation result.

[0230] This embodiment discloses a computer program product, the computer program product including a computer program, and when the computer program is executed by a processor, the following method is implemented:

[0231] Conduct time-series production simulation on the power system to obtain relevant parameters for carbon emission tracking calculation of the power system;

[0232] Determining a carbon emission factor based on the relevant parameters;

[0233] Carbon emission tracking calculation is performed according to the relevant parameters and the carbon emission factor to obtain a carbon emission calculation result.

[0234] This embodiment provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the following method is implemented:

[0235] Conduct time-series production simulation on the power system to obtain relevant parameters for carbon emission tracking calculation of the power system;

[0236] Determining a carbon emission factor based on the relevant parameters;

[0237] Carbon emission tracking calculation is performed according to the relevant parameters and the carbon emission factor to obtain a carbon emission calculation result.

[0238] Compared with the technical solutions in the prior art, the method for calculating carbon emissions of a power system provided in the embodiment of the present invention performs a time-series production simulation on the power system to obtain relevant parameters for tracking and calculating the carbon emissions of the power system; determines a carbon emission factor based on the relevant parameters; performs carbon emission tracking calculation based on the relevant parameters and the carbon emission factor to obtain a carbon emissions calculation result, which can comprehensively, accurately and timely calculate the carbon emissions of the power system.

[0239] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0240] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0241] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0242] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0243] In the description of this specification, the description with reference to the terms "one embodiment", "a specific embodiment", "some embodiments", "for example", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0244] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for calculating carbon emissions of a power system, characterized in that: include: Conduct time-series production simulation on the power system to obtain relevant parameters for carbon emission tracking calculation of the power system; Determining a carbon emission factor based on the relevant parameters; Carbon emission tracking calculation is performed according to the relevant parameters and the carbon emission factor to obtain a carbon emission calculation result.

2. The method for calculating carbon emissions of a power system according to claim 1, characterized in that: Determining the carbon emission factor according to the relevant parameters includes: According to the pre-established correspondence between unit power and carbon emissions, the carbon emission factor corresponding to the power generation power of each generator unit in period t and the carbon emission factor corresponding to the discharge power of each energy storage unit in period t are determined.

3. The method for calculating carbon emissions of a power system according to claim 2, characterized in that: The carbon emission tracking calculation is performed according to the relevant parameters and the carbon emission factor to obtain the carbon emission calculation result, including: Calculate the power contribution value of each generator set to each load in time period t according to the relevant parameters, and calculate the power contribution value of each energy storage unit to each load in time period t according to the relevant parameters; Multiply the power contribution value of each generator set to each load in period t by the carbon emission factor corresponding to the power generation of each generator set in period t, and add up the multiplication results to obtain a first calculation result; The power contribution value of each energy storage unit to each load in period t is multiplied by the carbon emission factor corresponding to the discharge power of each energy storage unit in period t, and the multiplication results are accumulated to obtain a second calculation result; The first calculation result and the second calculation result are added together to obtain the carbon emission apportionment of each node load.

4. The method for calculating carbon emissions of a power system according to claim 2, characterized in that: The carbon emission tracking calculation is performed according to the relevant parameters and the carbon emission factor to obtain the carbon emission calculation result, including: Calculate the power contribution value of each generator set to each energy storage set during time period t according to the relevant parameters; Multiply the power contribution value of each generator set to each energy storage set during period t by the carbon emission factor corresponding to the power generation power of each generator set during period t, and add up the multiplication results to obtain the equivalent load carbon emission share of the energy storage.

5. The method for calculating carbon emissions of a power system according to claim 2, characterized in that: The carbon emission tracking calculation is performed according to the relevant parameters and the carbon emission factor to obtain the carbon emission calculation result, including: Calculate the power contribution value of each generator set to each energy storage set during time period t according to the relevant parameters; According to the power contribution value of each generator set to each energy storage unit in period t and the carbon emission factor corresponding to the power generation power of each generator set in period t, the equivalent carbon emission factor of each energy storage unit in period t+1 is calculated; According to the relevant parameters and the equivalent carbon emission factors of each energy storage unit in time period t+1, the equivalent power source carbon emission apportionment of the energy storage is calculated.

6. The method for calculating carbon emissions of a power system according to claim 2, characterized in that: The method for calculating carbon emissions of the power system also includes: The carbon emissions of each generator set are obtained by multiplying the power generation of each generator set in period t by the carbon emission factor corresponding to the power generation of each generator set in period t.

7. The method for calculating carbon emissions of a power system according to any one of claims 1 to 6, characterized in that: The time-series production simulation of the power system includes: Conduct time-series production simulation of power systems based on safety constraints; The safety constraint conditions are obtained according to a pre-constructed charging and discharging constraint model of energy storage.

8. A device for calculating carbon emissions of a power system, characterized in that: include: A simulation unit is used to simulate the time-series production of the power system and obtain relevant parameters for carbon emission tracking calculation of the power system; A determination unit, used to determine a carbon emission factor according to the relevant parameters; The calculation unit is used to perform carbon emission tracking calculation according to the relevant parameters and the carbon emission factor to obtain a carbon emission calculation result.

9. The electric power system carbon emissions calculation device according to claim 8, characterized in that: The determining unit is specifically used for: According to the pre-established correspondence between unit power and carbon emissions, the carbon emission factor corresponding to the power generation power of each generator unit in period t and the carbon emission factor corresponding to the discharge power of each energy storage unit in period t are determined.

10. The electric power system carbon emissions calculation device according to claim 9, characterized in that: The computing unit is specifically used for: Calculate the power contribution value of each generator set to each load in time period t according to the relevant parameters, and calculate the power contribution value of each energy storage unit to each load in time period t according to the relevant parameters; Multiply the power contribution value of each generator set to each load in period t by the carbon emission factor corresponding to the power generation of each generator set in period t, and add up the multiplication results to obtain a first calculation result; The power contribution value of each energy storage unit to each load in period t is multiplied by the carbon emission factor corresponding to the discharge power of each energy storage unit in period t, and the multiplication results are accumulated to obtain a second calculation result; The first calculation result and the second calculation result are added together to obtain the carbon emission apportionment of each node load.

11. The device for calculating carbon emissions of a power system according to claim 9, characterized in that: The computing unit is specifically used for: Calculate the power contribution value of each generator set to each energy storage set during time period t according to the relevant parameters; Multiply the power contribution value of each generator set to each energy storage set during period t by the carbon emission factor corresponding to the power generation power of each generator set during period t, and add up the multiplication results to obtain the equivalent load carbon emission share of the energy storage.

12. The device for calculating carbon emissions of a power system according to claim 9, characterized in that: The computing unit is specifically used for: Calculate the power contribution value of each generator set to each energy storage set during time period t according to the relevant parameters; According to the power contribution value of each generator set to each energy storage unit in period t and the carbon emission factor corresponding to the power generation power of each generator set in period t, the equivalent carbon emission factor of each energy storage unit in period t+1 is calculated; According to the relevant parameters and the equivalent carbon emission factors of each energy storage unit in time period t+1, the equivalent power source carbon emission apportionment of the energy storage is calculated.

13. The device for calculating carbon emissions of a power system according to claim 9, characterized in that: The power system carbon emissions calculation device is also used for: The carbon emissions of each generator set are obtained by multiplying the power generation of each generator set in period t by the carbon emission factor corresponding to the power generation of each generator set in period t.

14. The device for calculating carbon emissions of a power system according to any one of claims 8 to 13, characterized in that: The simulation unit is specifically used for: Conduct time-series production simulation of power systems based on safety constraints; The safety constraint conditions are obtained according to a pre-constructed charging and discharging constraint model of energy storage.

15. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method according to any one of claims 1 to 7 is implemented.

16. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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