Source-load interaction method and system based on interaction load bidirectional net carbon contribution accounting

Abstract

The invention relates to a source load interaction method and system based on interaction load bidirectional net carbon contribution accounting. The method comprises the following steps: acquiring meteorological prediction data, predicting new energy output in a power grid, considering the load of each substation bus node, and calculating the net load of each main transformer node; according to the meteorological prediction data, in combination with a power grid new energy output rule, a production startup plan of an enterprise is optimized, and production loads and non-production loads in each time period in the enterprise are calculated; determining an interaction load and a network load interaction strategy according to the calculation result, and calculating bidirectional net carbon contribution to carry out strategy adjustment; the bidirectional net carbon contribution includes an upstream net carbon contribution of the interactive load to upstream new energy consumption and a downstream net carbon contribution to downstream product carbon unit consumption. Compared with the prior art, the method has the advantages that a bidirectional net carbon contribution value index is constructed, the net effect of quantitative interaction load change on upstream power system operation carbon emission and downstream product single carbon consumption is achieved, and upstream and downstream collaborative carbon reduction is promoted.

Description

Technical Field

[0001] This invention relates to the field of power load optimization technology, and in particular to a source-load interaction method and system based on bidirectional net carbon contribution accounting of interactive loads. Background Technology

[0002] Currently, the power system bears a dual mission. On the one hand, the power system itself must take the lead in achieving carbon neutrality, overcoming the technical bottleneck of high-proportion renewable energy consumption at the supply side. On the other hand, as a pillar industry of the national economy, the power system must lead the transformation of downstream end-user energy consumption, promoting low-carbon and efficient energy consumption across society, and contributing to carbon neutrality. Electricity load plays a crucial link in this process: upstream, the structure and distribution of load demand directly affect the level of renewable energy consumption, the operating efficiency of conventional units, and their direct carbon emissions; downstream, adjustments to electricity load lead to changes in other primary energy sources (such as coal and natural gas) in industrial production processes, and this adjustment process will significantly affect the energy consumption and product carbon footprint of the Industrial Internet. Therefore, clarifying the dual carbon attributes of electricity load and its spatiotemporal variation patterns is crucial for promoting the coordinated carbon reduction of the new power system and the Industrial Internet.

[0003] The paper "New Energy Consumption Strategy Based on Cyber-Physical-Social Integration" proposes a new energy consumption strategy based on cyber-physical-social integration, considering the participation of electric vehicle aggregators in grid optimization and dispatching, and verifies that the method can significantly improve the consumption level of new energy. The paper "Low-Carbon Development Model of Steel Industrial Park Energy System Driven by Hydrogen Energy" constructs a complex coupled system of "green electricity-hydrogen energy-industry," analyzes the emission reduction potential of steel enterprises, and the advantages of introducing hydrogen energy in terms of energy conservation, environmental protection, and economy.

[0004] Existing research has made progress in carbon emission reduction for both the power grid and enterprises, but the mechanisms for synergistic carbon reduction between the two remain relatively weak. On the one hand, as the international community continues to tighten tariff policies related to the carbon footprint of products, the construction of green supply chains requires the power system to accelerate its low-carbon transformation. On the other hand, the low-carbonization of the power system itself also relies on the deep interaction of diversified load resources on the industrial internet platform, forming a new pattern of mutual promotion and synergistic carbon reduction.

[0005] In this process, interactive loads play a crucial role as the core connecting link between the new power system and the industrial internet. A thorough understanding of the carbon emission attributes of interactive loads at both the grid and enterprise levels is key to breaking down industry barriers and improving the synergistic optimization of resources across society.

[0006] Net Carbon Contribution Value (NCCV) is the total amount of change in overall carbon emissions caused by the regulation of a load through response measures. Essentially, it represents the carbon increase or decrease effect brought about by the "proactive action" of the load. In the two scenarios of "source following load" and "source interacting with load", the net carbon contribution value of interactive loads has different flow directions.

[0007] Under the "source follows load" model, enterprises typically produce and use electricity as needed based on order requirements, with little consideration for the dynamic changes in the carbon emission intensity of purchased electricity. Carbon emissions are transferred in a unidirectional flow "power source → load → product," and product carbon emissions are highly coupled with the total electricity consumption of the load.

[0008] like Figure 1 As shown, under the "source-load interaction" model, loads can routinely participate in grid regulation. Adjustments to start-up times and equipment not only alter the load curves of the metering system, affecting carbon emissions from energy transfer, but also influence changes in other primary energy sources in the production line (such as coal and gas consumption). This means that the interactive load affects both upstream and downstream energy consumption, which is then comprehensively reflected in the final product. Therefore, the traditional unidirectional analysis approach is no longer applicable. Carbon emission transfer is a two-way coupling of "power source ↔ interactive load ↔ product." Thus, how to accurately quantify and assess the carbon emissions of the interactive load under the "source-load interaction" model, providing a measurable theoretical basis for coordinated carbon reduction across upstream and downstream sectors, is a pressing technical problem that needs to be solved. Summary of the Invention

[0009] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a source-load interaction method and system based on bidirectional net carbon contribution accounting of interactive loads, so as to realize accurate quantitative assessment of carbon emissions of interactive loads under the "source-load interaction" mode, and provide a measurable theoretical basis for upstream and downstream collaborative carbon reduction.

[0010] The objective of this invention can be achieved through the following technical solutions: A source-load interaction method based on bidirectional net carbon contribution accounting of interactive loads includes the following steps: Obtain meteorological forecast data; Based on meteorological forecast data, the output of new energy sources in the power grid is predicted, and the load of each substation bus node is considered to calculate the net load of each main transformer node. Based on meteorological forecast data and combined with the power grid's renewable energy output patterns, the company's production start-up plan is optimized, and the production load and non-production load within the company at different times are calculated. Based on the net load forecast results of each main transformer node in the power grid, and the production load and non-production load of each time period within the enterprise, the interactive load and the corresponding grid-load interaction strategy are determined, and the bidirectional net carbon contribution of the grid-load interaction strategy is calculated for strategy adjustment. The bidirectional net carbon contribution includes the upstream net carbon contribution of the interactive load to the upstream consumption of new energy and the downstream net carbon contribution to the carbon unit consumption of downstream products.

[0011] Furthermore, the upstream net carbon contribution is measured by the tracking deviation between the actual load curve and the ideal load curve of the interactive load.

[0012] Furthermore, the calculation expression for the upstream net carbon contribution is as follows: In the formula, For interactive load Upstream net carbon contribution, For the corresponding evaluation value, The number of conventional generating units participating in the balancing process. This is the corresponding carbon emission conversion factor. Let i be the balance quantity of the i-th conventional unit. T represents the research period. For interactive load The ideal load curve of the node, For interactive load The actual load curve of the node. This is the evaluation function for tracking deviation.

[0013] Furthermore, the downstream net carbon contribution is measured by the distance between the actual product carbon consumption per unit of the interactive load and the ideal product carbon consumption per unit of the load. Furthermore, the calculation expression for the downstream net carbon contribution is as follows: In the formula, For interactive load The downstream net carbon contribution is the actual single carbon consumption curve. Compared with the ideal single carbon consumption curve distance, For the evaluation function of tracking deviation, To study the carbon consumption per product of enterprises within a research period. For the ideal single-product carbon consumption curve, The actual load curve of the meter at the critical point throughout its entire life cycle. For the ideal load curve of the meter at the critical point throughout its entire life cycle, and These correspond to the product output and carbon emissions, respectively. The number of types of energy involved in the production of the product. Let j be the energy consumption curve for the j-th energy source. This is the corresponding carbon emission conversion factor.

[0014] Furthermore, the bidirectional net carbon contribution is a weighted sum of the partial derivatives of the effects of interactive load shape changes on the upstream and downstream net carbon contributions.

[0015] Furthermore, the calculation expression for the bidirectional net carbon contribution is as follows: In the formula, The net carbon contribution is calculated as a weighted sum of the partial derivatives of the impact of changes in the shape of the interactive load on the net carbon of upstream and downstream areas. and These represent the net impacts of upstream and downstream carbon emissions from the interactive load, respectively. and These are the weighting coefficients for the carbon attributes of upstream and downstream industries, respectively. This is the actual load curve of the meter at the control point.

[0016] Furthermore, the interactive load is a combination of the production load to be adjusted and the non-production load.

[0017] Furthermore, the network-load interaction strategy is an adjustment scheme for production loads and non-production loads that serve as interactive loads.

[0018] The present invention also provides a source-load interaction system based on bidirectional net carbon contribution accounting of interactive load, including a memory and a processor. The memory stores a computer program, and the processor calls the computer program to execute the steps of the method described above.

[0019] Compared with the prior art, the present invention has the following advantages: (1) This invention targets the interactive load connecting the power system and the industrial internet. It calculates the net carbon contribution of the interactive strategy from two perspectives: the contribution of the interactive load to the upstream renewable energy consumption and the contribution of the downstream product carbon consumption. This enables the grid-load interaction optimization adjustment based on carbon reduction targets, broadens the boundary of virtual power plant orderliness evaluation, quantifies the net effect of interactive load changes on the upstream power system operation carbon emissions and downstream product carbon consumption, takes into account renewable energy consumption and production continuity constraints, and provides a measurable theoretical basis for upstream and downstream collaborative carbon reduction.

[0020] (2) The present invention uses the tracking deviation between the actual load curve and the ideal load curve to achieve accurate measurement of the net carbon contribution of the upstream; by defining the evaluation index "single carbon consumption" of the product carbon footprint and considering the impact of the adjustment of equipment operation mode on the single carbon consumption of the product, the present invention achieves accurate measurement of the net carbon contribution of the downstream through the distance between the actual product carbon single consumption and the ideal product carbon single consumption of the interactive load. Attached Figure Description

[0021] Figure 1 This is a schematic diagram illustrating the bidirectional net carbon contribution of an interactive load, as provided in the background art of this invention. Figure 2 This is a schematic flowchart of a source-load interaction method based on bidirectional net carbon contribution accounting of interactive loads provided in an embodiment of the present invention; Figure 3 This is a schematic diagram illustrating the specific process of a source-load interaction method based on bidirectional net carbon contribution accounting of interactive loads, provided in an embodiment of the present invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] Example 1 like Figure 1 and Figure 2 As shown, this embodiment provides a source-load interaction method based on bidirectional net carbon contribution accounting of interactive loads, including the following steps: S1: Obtain meteorological forecast data; S2: Based on meteorological forecast data, predict the output of new energy sources in the power grid, consider the load of each substation bus node, and calculate the net load of each main transformer node. S3: Based on meteorological forecast data and combined with the power grid's renewable energy output patterns, optimize the company's production start-up plan and calculate the production load and non-production load within the company at different times. S4: Based on the net load forecast results of each main transformer node in the power grid, as well as the production load and non-production load of each time period within the enterprise, determine the interactive load and the corresponding grid-load interaction strategy, and calculate the two-way net carbon contribution of the grid-load interaction strategy in order to adjust the strategy; the two-way net carbon contribution includes the upstream net carbon contribution of the interactive load to the upstream new energy consumption and the downstream net carbon contribution to the carbon unit consumption of downstream products.

[0026] This plan specifically considers the following curves based on the net load forecast results to determine the interactive load: Target load curve A of the power grid: If the load shape of an enterprise is A, it is most conducive to the consumption of new energy sources; The company's actual load curve B; The company's carbon emission curve C (determined by production load and non-production load); From A's perspective, there is an ideal curve B. From C's perspective, there is also an ideal curve B'. B and B' may be different. It is necessary to adjust the production load and non-production load to maximize the weighted sum of B with respect to A and C.

[0027] Production load and non-production load together constitute the interactive load. For example, a company may have only one electricity meter, and the power company calculates electricity bills through this meter. The load recorded in the meter is divided into two categories: non-production load (office work, lighting, air conditioning, etc.) and production load (assembly line equipment, motors, machine tools, etc.). Adjusting the load has two effects. First, changing the production load alters the load curve of the electricity meter, which impacts the absorption of new energy sources in the power grid, thus changing upstream carbon emissions. Second, changing the generation load affects the coal combustion and high-temperature steam production within enterprises, thereby changing downstream carbon emissions.

[0028] Preferably, the bidirectional net carbon contribution is the weighted sum of the partial derivatives of the effects of changes in the shape of the interactive load on the upstream and downstream net carbon contributions.

[0029] Optionally, define the two-way net carbon contribution of the interactive loads. for: (1) In the formula, This is the interactive load curve; and These represent the net impacts of upstream and downstream carbon emissions from the interactive load, respectively. and These are the weighting coefficients for the carbon attributes of upstream and downstream industries, respectively. The meaning is the weighted sum of the partial derivatives of the impact of interactive load shape changes on upstream and downstream net carbon.

[0030] Upstream Net Carbon Contribution The calculation methods include: Ideally, considering the power output curve and regulation capacity of the entire network's new energy sources, each bus node corresponds to an ideal load curve, enabling the system to achieve nearly 100% new energy consumption. If the interactive load has sufficient capacity and flexibility to fully track the ideal load curve, the net carbon contribution of the interactive load is maximized, corresponding to zero carbon emission responsibility upstream; conversely, if the tracking capacity is insufficient, the grid needs to activate conventional units to balance the deviation between the interactive load and the ideal load. Therefore, the net carbon contribution upstream can be measured by the tracking deviation between the actual load curve and the ideal load curve, as shown in equation (2): (2) In the formula, T represents the research period. Interactive load The ideal load curve of the node, For the evaluation function of tracking deviation, The corresponding evaluation value; The number of conventional generating units participating in the balancing process. Let i be the balance quantity of the i-th conventional unit. This is the corresponding carbon emission conversion factor, with units of gCO2 / kW.h.

[0031] Downstream Net Carbon Contribution The calculation methods include: Currently, enterprise energy consumption audits primarily rely on the "GB / T3484-2009 General Rules for Enterprise Energy Management Balance," which uses statistics on energy income, expenditure, flow, and balance. Secondary energy consumption is often converted using fixed conversion factors. Internationally used standards, such as "Greenhouse Gas Accounting System: Enterprise Accounting and Reporting Standards," propose sub-methods such as Scope 1 (direct emissions), Scope 2 (indirect emissions such as electricity purchases), and Scope 3 (other indirect emissions). However, existing standards rarely consider the dynamic changes in carbon emission factors related to electricity, and the measurement accuracy and spatiotemporal resolution of carbon emissions are relatively limited.

[0032] From the perspective of enterprise production process, the entire product manufacturing consists of multiple functional areas of equipment and process links. Each piece of equipment has its energy demand specifications (such as power, coal consumption, steam temperature, etc.) marked before leaving the factory. Theoretically, under standard design conditions, the product production efficiency is the highest, which is reflected in the lowest unit consumption of the product (such as standard coal / ton). However, unit consumption only evaluates the product from the energy consumption dimension. The electrical energy part is converted into equivalent calorific value by a non-time-varying conversion factor, which has a certain deviation from reducing carbon emissions. Therefore, in the process of developing the flexibility of interactive loads of industrial enterprises, this paper first defines the evaluation index of product carbon footprint as "unit carbon consumption". Then, it considers the impact of equipment operation mode adjustment (such as duration) on product unit carbon consumption, and measures it by the distance between the actual product unit carbon consumption and the ideal product unit carbon consumption of the interactive load. As shown in equation (3): (3) In the formula, To study the carbon consumption per product of enterprises within a research period. and These are the corresponding product output and carbon emissions, respectively. The number of types of energy involved in the production of the product. Let j be the energy consumption curve for the j-th energy source. This is the corresponding carbon emission conversion factor; Actual single carbon consumption curve Compared with the ideal single carbon consumption curve The distance.

[0033] Example 2 This embodiment provides a source-load interaction system based on bidirectional net carbon contribution accounting of interactive loads, including a memory and a processor. The memory stores a computer program, and the processor calls the computer program to execute the steps of the source-load interaction method based on bidirectional net carbon contribution accounting of interactive loads as described in Embodiment 1.

[0034] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A source-load interaction method based on interactive load two-way net carbon contribution accounting, characterized in that, Includes the following steps: Obtain meteorological forecast data; Based on meteorological forecast data, the output of new energy sources in the power grid is predicted, and the load of each substation bus node is considered to calculate the net load of each main transformer node. Based on meteorological forecast data and combined with the power grid's renewable energy output patterns, the company's production start-up plan is optimized, and the production load and non-production load within the company at different times are calculated. Based on the net load forecast results of each main transformer node in the power grid, and the production load and non-production load of each time period within the enterprise, the interactive load and the corresponding grid-load interaction strategy are determined, and the bidirectional net carbon contribution of the grid-load interaction strategy is calculated for strategy adjustment. The bidirectional net carbon contribution includes the upstream net carbon contribution of the interactive load to the upstream consumption of new energy and the downstream net carbon contribution to the carbon unit consumption of downstream products.

2. The source-load interaction method based on bidirectional net carbon contribution accounting of interactive loads according to claim 1, characterized in that, The upstream net carbon contribution is measured by the tracking deviation between the actual load curve and the ideal load curve of the interactive load.

3. The source-load interaction method based on bidirectional net carbon contribution accounting of interactive loads according to claim 2, characterized in that, The formula for calculating the upstream net carbon contribution is as follows: ； In the formula, For interactive load Upstream net carbon contribution, For the corresponding evaluation value, The number of conventional generating units participating in the balancing process. This is the corresponding carbon emission conversion factor. Let i be the balance quantity of the i-th conventional unit. T represents the research period. For interactive load The ideal load curve of the node, For interactive load The actual load curve of the node. This is the evaluation function for tracking deviation.

4. The source-load interaction method based on bidirectional net carbon contribution accounting of interactive loads according to claim 1, characterized in that, The downstream net carbon contribution is measured by the distance between the actual product carbon consumption per unit of the interactive load and the ideal product carbon consumption per unit of the load.

5. The source-load interaction method based on bidirectional net carbon contribution accounting of interactive loads according to claim 4, characterized in that, The calculation expression for the downstream net carbon contribution is as follows: ； In the formula, For interactive load The downstream net carbon contribution is the actual single carbon consumption curve. Compared with the ideal single carbon consumption curve distance, For the evaluation function of tracking deviation, To study the carbon consumption per product of enterprises within a research period. For the ideal single-product carbon consumption curve, The actual load curve of the meter at the critical point throughout its entire life cycle. For the ideal load curve of the meter throughout its entire life cycle, and These correspond to the product output and carbon emissions, respectively. The number of types of energy involved in the production of the product. Let j be the energy consumption curve for the j-th energy source. This is the corresponding carbon emission conversion factor.

6. The source-load interaction method based on bidirectional net carbon contribution accounting of interactive loads according to claim 1, characterized in that, The bidirectional net carbon contribution is the weighted sum of the partial derivatives of the effects of interactive load shape changes on the upstream and downstream net carbon contributions.

7. The source-load interaction method based on bidirectional net carbon contribution accounting of interactive loads according to claim 6, characterized in that, The calculation expression for the two-way net carbon contribution is as follows: ； In the formula, The net carbon contribution is calculated as a weighted sum of the partial derivatives of the impact of changes in the shape of the interactive load on the net carbon of upstream and downstream areas. and These represent the net impacts of upstream and downstream carbon emissions from the interactive load, respectively. and These are the weighting coefficients for the carbon attributes of upstream and downstream industries, respectively. This is the actual load curve of the meter at the control point.

8. The source-load interaction method based on bidirectional net carbon contribution accounting of interactive loads according to claim 1, characterized in that, The interactive load is a combination of the production load and the non-production load to be adjusted.

9. The source-load interaction method based on bidirectional net carbon contribution accounting of interactive loads according to claim 1, characterized in that, The aforementioned load-grid interaction strategy is an adjustment scheme for production loads and non-production loads that serve as interactive loads.

10. A source-load interaction system based on bidirectional net carbon contribution accounting of interactive loads, characterized in that, It includes a memory and a processor, the memory storing a computer program, and the processor calling the computer program to perform the steps of the method as described in any one of claims 1 to 9.

Images