Carbon emission reduction accounting method for park energy power supply system

Abstract

The invention relates to a carbon emission reduction accounting method for a park energy power supply system. The method comprises the following steps: collecting park and internal enterprise data and regional power background data; respectively calculating carbon emission reduction of the park in a power generation link, a power transmission link, an energy storage link and a power utilization link in the year; and calculating the whole annual carbon emission reduction of the park. The park-level energy power system carbon emission reduction effect evaluation method is proposed for the first time, carbon emission reduction contribution in the aspects of energy power system construction, operation and maintenance and the like in each year is quantified in the park green low-carbon transformation process, subjective human factors of an existing evaluation method are greatly reduced, and the evaluation efficiency is improved. Park management personnel can be accurately guided to evaluate the project construction effect, and the key direction of park construction in the next year is planned.

Description

Technical Field

[0001] The present invention belongs to the field of carbon emission reduction assessment, and in particular to a method for calculating carbon emission reduction in a park energy and power supply system. Background Art

[0002] Industrial parks are an important driving force for my country's economic development and industrial transformation and upgrading, and are also the main source of carbon emissions. At present, about 70% of my country's industrial energy consumption is concentrated in industrial parks, which not only contributes more than half of the country's industrial output value, but also produces 31% of the country's carbon emissions. Therefore, governments at all levels have tapped the potential for carbon reduction and created zero-carbon parks. However, the construction of zero-carbon parks requires a lot of resources and time investment, especially in the transformation of energy and power supply. There is a lack of technical guidance on how to scientifically and economically utilize the construction and transformation of the energy and power supply system to achieve overall carbon emission reduction in the park. At the same time, after the energy and power supply system is built, it is necessary to combine the economic development of the park with the changes in the internal power load to conduct a periodic evaluation of the operation of the energy and power supply system. It is difficult to comprehensively and accurately evaluate the investment effectiveness of the park and the management level of the energy supply system by relying solely on traditional indicators such as "green power usage ratio", which is not conducive to guiding the park to accelerate the progress of energy and power system transformation.

[0003] Therefore, it is necessary to propose a comprehensive evaluation method for carbon emission reduction effectiveness in power generation, transmission, energy storage and other links in the park's energy and power supply system. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a method for calculating the carbon emission reduction of the park's energy and power supply system, which can quantify the overall carbon emission reduction effectiveness of the park's energy and power supply system, and provide a basis for guiding the park to improve the green and low-carbon level of the energy and power supply system and support the government in carrying out dual control management and assessment of the park's carbon emissions.

[0005] The technical solution adopted by the present invention to solve the technical problem is:

[0006] A method for calculating carbon emission reduction of a park energy and power supply system comprises the following steps:

[0007] S1 collects park and internal enterprise data and regional power background data;

[0008] S2 calculates the annual carbon emission reduction of the park in the power generation, transmission, storage and electricity consumption links;

[0009] S3 calculates the park’s overall annual carbon emission reduction.

[0010] Furthermore, S1 collects park and internal enterprise data and regional power background data including:

[0011] Collect the annual installation of new energy power generation facilities in the park and its internal enterprises, as well as the annual power generation data;

[0012] Collect the annual replacement of energy-saving distribution transformers and energy-saving wires in the park and internal enterprises, as well as the load loss and no-load loss data of transformers before and after replacement, and the resistivity, length, cross-sectional area, and rated current of wires before and after replacement;

[0013] Collect the annual addition of energy storage facilities in the park and its internal enterprises, as well as the annual power generation of the park's new energy facilities and the data on the storage and utilization of power grid electricity;

[0014] Collect the replacement status of energy-saving electrical equipment in the park and internal enterprises, as well as the rated power data before and after the replacement;

[0015] Collect the most recently disclosed annual carbon dioxide emission factors of the regional power grid, as well as the region's annual total power generation and renewable energy power generation after excluding green electricity transactions, and calculate the proportion of renewable energy in the total power grid electricity.

[0016] Furthermore, the calculation formula for carbon emission reduction in the power generation link described in S2 is:

[0017] CE1=AD1*EF(1)

[0018] Among them, AD1 is the renewable energy electricity generation directly used within the park throughout the year, and EF is the most recently disclosed annual carbon dioxide emission factor for the area to which the park belongs.

[0019] Furthermore, the calculation formula for carbon emission reduction in the power transmission link described in S2 is:

[0020] CE2=CE 21 +CE 22 (2)

[0021]

[0022] Among them, Pk i0 、Pe i0 is the load loss and no-load loss before transformer replacement, Pk i 、Pe i is the load loss and no-load loss after transformer replacement, n is the total number of transformers replaced, ρ j0 , L j0 , S j0 Replace the resistivity, length, and cross-sectional area of ​​the leading wire respectively, ρ j , L j , S j Resistivity, length, and cross-sectional area of ​​the replaced conductors, respectively. m is the total number of replaced conductor segments. I N It is the rated current of the load connected to the wire.

[0023] Furthermore, the calculation formula for carbon emission reduction in the energy storage link described in S2 is:

[0024] CE3=CE 31 +CE 32 (5)

[0025]

[0026]

[0027] Among them, AD k1 is the amount of renewable energy generated within the park stored and utilized by the kth energy storage facility, AD k2 The amount of grid electricity stored and utilized by the kth energy storage facility, η k is the efficiency of the kth energy storage facility, and q% is the proportion of renewable energy power generation in the region’s total annual power generation after excluding green electricity trading.

[0028] Furthermore, the calculation formula for carbon emission reduction in electricity consumption and other links described in S2 is:

[0029]

[0030] Among them, p l0 is the power before the energy-consuming facility is replaced, p l It is the power after the energy-consuming facilities are replaced.

[0031] Furthermore, the calculation formula for the overall annual carbon emission reduction of the park described in S3 is:

[0032] CE=CE1+CE2+CE3+CE4(9).

[0033] The advantages and positive effects of the present invention are:

[0034] This invention proposes for the first time a park-level energy and power system carbon emission reduction effectiveness assessment method, which quantifies the carbon emission reduction contribution of the energy and power system construction, operation and maintenance, etc. each year during the park's green and low-carbon transformation. It greatly reduces the subjective human factors of existing assessment methods, and can accurately guide park managers to evaluate project construction results and plan the key directions of park construction for the next year. At the same time, it provides technical support for government departments to promote regional parks to upgrade their energy and industrial structures, and implement zero-carbon park construction effectiveness evaluation, guide parks and internal enterprises to increase investment in energy and power system upgrades, and promote the implementation of regional dual-carbon goals. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 The figure is a flow chart of the method of the present invention. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below through specific examples. The following examples are only illustrative and not restrictive, and the protection scope of the present invention cannot be limited thereto.

[0037] The process flow chart of the present invention is shown in Figure 1 , evaluate the carbon emission reduction effects of power generation, transmission, energy storage, and electricity consumption respectively; finally combine them into the overall carbon emission reduction effect of the park's energy and power supply system. It includes the following steps:

[0038] S1 collects the annual installation of new energy power generation facilities in the park and its internal enterprises, as well as the annual power generation data; collects the annual replacement of energy-saving distribution transformers and energy-saving wires in the park and its internal enterprises, as well as the load loss and no-load loss data of the transformers before and after the replacement, and the resistivity, length, cross-sectional area, and rated current of the wires before and after the replacement; collects the annual addition of energy storage facilities in the park and its internal enterprises, as well as the annual power generation of the park's new energy facilities and the data on the storage and utilization of the power grid; collects the replacement of energy-saving electrical equipment in the park and its internal enterprises, as well as the rated power data before and after the replacement;

[0039] Collect the most recently disclosed annual carbon dioxide emission factors of the regional power grid, as well as the region's annual total power generation and renewable energy power generation after excluding green power transactions, and calculate the proportion of renewable energy in the total power generation of the power grid;

[0040] S2 uses formulas (1), (2), (5), and (8) to calculate the park's annual carbon emission reduction in power generation, transmission, energy storage, and electricity consumption;

[0041] S3 uses formula (9) to calculate the overall annual carbon emission reduction assessment results of the park.

[0042] The calculation formula for carbon emission reduction in power generation is:

[0043] CE1=AD1*EF(1)

[0044] The list of new energy power generation projects built by the park and internal enterprises in the year, as well as the new energy power generation directly used in the park throughout the year (AD1), are counted, and the carbon emission reduction in the power generation link (CE1) is calculated using the emission factor method. Among them, the power grid carbon emission factor selects the most recently disclosed annual carbon dioxide emission factor (EF) of the region to which the park belongs.

[0045] The calculation formula for carbon emission reduction in the power transmission link is:

[0046] CE2=CE 21 +CE 22 (2)

[0047]

[0048] Statistics were collected on the replacement of energy-saving transformers and energy-saving wires in the park and its internal enterprises in that year, and the carbon emission reduction in the power transmission link (CE2) was calculated using the emission factor method. i0 、Pe i0 is the load loss and no-load loss before transformer replacement, Pk i 、Pe i is the load loss and no-load loss after transformer replacement, n is the total number of transformers replaced, ρ j0 , L j0 , S j0 Replace the resistivity, length, and cross-sectional area of ​​the leading wire respectively, ρ j , L j , S j Resistivity, length, and cross-sectional area of ​​the replaced conductors, respectively. m is the total number of replaced conductor segments. I N It is the rated current of the load connected to the wire.

[0049] Among them, the calculation formula for carbon emission reduction in the energy storage link is:

[0050] CE3=CE 31 +CE 32 (5)

[0051]

[0052]

[0053] Statistics are collected for the year when the park construction and internal enterprises’ newly built energy storage facilities store the excess electricity generated by local renewable energy power generation projects and grid electricity, and the carbon emission reduction in the energy storage link is calculated using the emission factor method (CE3). k1 is the amount of renewable energy generated within the park stored and utilized by the kth energy storage facility, AD k2 The amount of grid electricity stored and utilized by the kth energy storage facility, η k is the efficiency of the kth energy storage facility, and q% is the proportion of renewable energy power generation in the region’s total annual power generation after excluding green electricity trading.

[0054] Among them, the calculation formula for carbon emission reduction in electricity consumption and other links is:

[0055]

[0056] Statistics were collected on the replacement of energy-using facilities between the industrial park and its internal enterprises in the current year, and the carbon emission reduction in the power transmission link (CE4) was calculated using the emission factor method. l0 is the power before the energy-consuming facility is replaced, p l It is the power after the energy-consuming facilities are replaced.

[0057] The overall carbon emission reduction assessment result of the park is the sum of equations (1), (2), (5) and (8).

[0058] CE=CE1+CE2+CE3+CE4(9).

[0059] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept, which all belong to the protection scope of the present invention.

Claims

1. A method for calculating carbon emission reduction of a park energy and power supply system, characterized in that: The steps include: S1 collects park and internal enterprise data and regional power background data; S2 calculates the annual carbon emission reduction of the park in the power generation, transmission, storage and electricity consumption links; S3 calculates the park’s overall annual carbon emission reduction.

2. The evaluation method according to claim 1, characterized in that: S1 collects park and internal enterprise data and regional power background data including: Collect the annual installation of new energy power generation facilities in the park and its internal enterprises, as well as the annual power generation data; Collect the annual replacement of energy-saving distribution transformers and energy-saving wires in the park and internal enterprises, as well as the load loss and no-load loss data of transformers before and after replacement, and the resistivity, length, cross-sectional area, and rated current of wires before and after replacement; Collect the annual addition of energy storage facilities in the park and its internal enterprises, as well as the annual power generation of the park's new energy facilities and the data on the storage and utilization of power grid electricity; Collect the replacement status of energy-saving electrical equipment in the park and internal enterprises, as well as the rated power data before and after the replacement; Collect the most recently disclosed annual carbon dioxide emission factors of the regional power grid, as well as the region's annual total power generation and renewable energy power generation after excluding green electricity transactions, and calculate the proportion of renewable energy in the total power grid electricity.

3. The evaluation method according to claim 2, characterized in that: The calculation formula for carbon emission reduction in the power generation process described in S2 is: CE1=AD1*EF(1) Among them, AD1 is the renewable energy electricity generation directly used within the park throughout the year, and EF is the most recently disclosed annual carbon dioxide emission factor for the area to which the park belongs.

4. The evaluation method according to claim 3, characterized in that: The calculation formula for carbon emission reduction in the power transmission link described in S2 is: CE2=CE 21 +CE 22 (2) Among them, Pk i0 、Pe i0 is the load loss and no-load loss before transformer replacement, Pk i 、Pe i is the load loss and no-load loss after transformer replacement, n is the total number of transformers replaced, ρ j0 , L j0 , S j0 Replace the resistivity, length, and cross-sectional area of ​​the leading wire respectively, ρ j , L j , S j Resistivity, length, and cross-sectional area of ​​the replaced conductors, respectively. m is the total number of replaced conductor segments. I N It is the rated current of the load connected to the wire.

5. The evaluation method according to claim 4, characterized in that: The calculation formula for carbon emission reduction in the energy storage link described in S2 is: CE3=CE 31 +CE 32 (5) Among them, AD k1 is the amount of renewable energy generated within the park stored and utilized by the kth energy storage facility, AD k2 The amount of grid electricity stored and utilized by the kth energy storage facility, η k is the efficiency of the kth energy storage facility, and q% is the proportion of renewable energy power generation in the region’s total annual power generation after excluding green electricity trading.

6. The evaluation method according to claim 5, characterized in that: The calculation formula for carbon emission reduction in electricity consumption and other links described in S2 is: Among them, p l0 is the power before the energy-consuming facility is replaced, p l It is the power after the energy-consuming facilities are replaced.

7. The evaluation method according to claim 6, characterized in that: The calculation formula for the overall annual carbon emission reduction of the park described in S3 is: CE=CE1+CE2+CE3+CE4(9).

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