Rights and responsibility matched distributed power generation transaction power transmission and distribution cost calculation system

Abstract

A distributed power generation transaction power transmission and distribution cost calculation system with matched responsibility comprises an analysis unit for a distributed power generation transaction to undertake a power transmission and distribution asset recovery share, a calculation unit for the distributed power generation transaction to undertake the power transmission and distribution asset recovery share, and a distributed power generation transaction power transmission and distribution cost calculation and release unit. The power transmission and distribution asset share of the power grid enterprise is reasonably recovered on the basis of right and responsibility matching.

Description

Technical Field

[0001] The present invention relates to a technology in the field of distributed power grids, specifically a power transmission and distribution cost calculation system for distributed power generation transactions with matching rights and responsibilities. Background Art

[0002] The power transmission and distribution cost calculation system of distributed power generation transactions with matching rights and responsibilities can accurately calculate the share of power transmission and distribution assets that should be recovered according to the principle of matching rights and responsibilities, and clarify the degree of use of power transmission and distribution assets by distributed power generation transactions of different voltage levels. The existing distributed power generation power transmission and distribution cost calculation and collection scheme is difficult to achieve effectively. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention proposes a power transmission and distribution cost calculation system for distributed power generation transactions with rights and responsibilities matching, which reasonably recovers the power transmission and distribution asset share of the power grid enterprise on the basis of rights and responsibilities matching.

[0004] The present invention is achieved through the following technical solutions:

[0005] The present invention relates to a power transmission and distribution cost calculation system for distributed power generation transactions with matching rights and responsibilities, comprising: an analysis unit for distributed power generation transactions to bear power transmission and distribution asset recovery shares, a calculation unit for distributed power generation transactions to bear power transmission and distribution asset recovery shares, and a distributed power generation transaction power transmission and distribution cost calculation and release unit, wherein: the analysis unit for distributed power generation transactions to bear power transmission and distribution asset recovery shares analyzes the power transmission and distribution asset investment shares allocated to distributed power generation transactions in each voltage level according to the use share of distributed power generation on power grid power transmission and distribution assets and the impact on traditional electric energy transactions; the calculation unit for distributed power generation transactions to bear power transmission and distribution asset recovery shares improves the calculation method according to the two parts of power transmission and distribution asset recovery shares, and obtains the share that distributed power generation should bear for using power grid power transmission and distribution assets and the shortfall of traditional electric energy transmission and distribution asset recovery caused by distributed power generation; the distributed power generation transaction power transmission and distribution cost calculation and release unit calculates the distributed power generation power transmission and distribution cost of the corresponding voltage level according to the two parts of power transmission and distribution asset recovery shares calculated by the previous unit and the power sales volume of the distributed power generation transactions at the voltage level.

[0006] The analysis unit for the share of transmission and distribution asset recovery borne by distributed power generation transactions, according to the impact of distributed power generation transactions on traditional electricity transactions, compares the transmission and distribution fees of traditional electricity transactions charged at the original rate with the share of transmission and distribution asset recovery that traditional electricity transactions should bear, and obtains the conclusion that the share of transmission and distribution asset recovery borne by distributed power generation transactions includes two parts, namely, the share that distributed power generation should bear for using grid transmission and distribution assets and the shortfall of traditional power transmission and distribution asset recovery caused by distributed power generation.

[0007] The calculation unit for the share of transmission and distribution asset recovery borne by the distributed power generation transaction includes: a calculation unit for the share to be borne and a calculation unit for the shortfall of transmission and distribution asset recovery, wherein: the calculation unit for the share to be borne allocates in proportion according to the total transmission power of each voltage level, the power transmitted by the distributed power generation and the share of transmission and distribution investment to be recovered at the voltage level to obtain the share of transmission and distribution asset recovery that the distributed power generation at each voltage level should bear when using the power grid transmission and distribution assets; the calculation unit for the shortfall of transmission and distribution asset recovery obtains the conclusion that the distributed power generation input at a certain voltage level will not affect the recovery of traditional power transmission and distribution assets below the voltage level according to the difference between the transmission and distribution fee of traditional power transactions collected at the original rate and the share of transmission and distribution asset recovery that the traditional power transactions should bear, and based on this, the difference in the recovery of transmission and distribution assets can be allocated in proportion to the input end of the distributed power generation, and then according to the end-to-end power purchase method, the difference in the recovery of transmission and distribution assets can be transferred to the user end of the distributed power generation at each voltage level to obtain the shortfall of traditional power transmission and distribution asset recovery caused by the distributed power generation that users of different voltage levels need to bear.

[0008] The distributed power generation transaction transmission and distribution cost calculation and release unit includes: a distributed power generation transmission and distribution cost calculation unit, and a distributed power generation transmission and distribution cost release unit, wherein: the distributed power generation transmission and distribution cost calculation unit divides the power transmission and distribution asset recovery share undertaken by the distributed power generation transaction and the power sales volume of the distributed power generation transaction part of each voltage level, and obtains the distributed power generation transmission and distribution cost. The distributed power generation transmission and distribution cost release unit releases the calculated distributed power generation transmission and distribution cost to users and agents of each voltage level for charging.

[0009] The present invention relates to a distributed generation transaction transmission and distribution cost calculation method based on the rights and responsibilities matching of the above system, which divides the transmission and distribution and sales of each voltage level of the power grid into two parts: traditional power trading and distributed generation trading, and on this basis, calculates the recovery share of the transmission and distribution assets of each part according to the degree of use of the transmission and distribution assets by traditional power trading and distributed generation trading. Then, under the premise of ensuring that the transmission and distribution price of traditional power energy trading remains unchanged, the calculation rules of the transmission and distribution cost of distributed generation trading are designed to ensure that the investment share of the transmission and distribution assets is fully recovered. Technical Effects

[0010] The present invention calculates the difference in the share of power transmission and distribution asset recovery at each voltage level, and obtains that distributed power generation input at a certain voltage level will not affect the recovery of traditional power transmission and distribution assets below the voltage level. Based on this, the difference in power transmission and distribution asset recovery can be proportionally allocated to the input end of distributed power generation, and then the difference in power transmission and distribution asset recovery can be transferred to the user end of distributed power generation at each voltage level according to the end-to-end power purchase method. Compared with the prior art, the present invention ensures that the investment recovery of power transmission and distribution assets of power grid enterprises calculated by this method is more sufficient than other methods through cross-subsidy. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the system of the present invention;

[0012] Figure 2 A schematic diagram of the share of transmission and distribution asset recovery that should be borne for distributed generation transactions;

[0013] Figure 3 It is a flow chart of the present invention;

[0014] Figure 4 An example diagram of input and sales volume for distributed generation transactions;

[0015] Figure 5 The electricity sales and permitted revenues for each voltage level under the unified rate electricity price in 2023;

[0016] Figure 6 The electricity sales and permitted revenues at all voltage levels under distributed generation transactions will be included in the unified rate electricity price in 2023. DETAILED DESCRIPTION

[0017] like Figure 1 As shown, this embodiment relates to a distributed power generation transaction transmission and distribution cost calculation method based on the rights and responsibilities matching of the above system, which specifically includes:

[0018] S1: Analyze the share of transmission and distribution asset recovery allocated to distributed generation transactions in a certain voltage level i to reflect the share of grid transmission and distribution assets used and the impact on traditional power transactions, including:

[0019] ① Since distributed generation transactions use the power transmission and distribution assets of the power grid, it is necessary to apportion the share of power transmission and distribution asset recovery at the voltage level involved;

[0020] ② Since distributed power generation transactions have led to a reduction in the volume of traditional electricity transactions, distributed power generation transactions need to bear the share of transmission and distribution asset recovery for this amount of electricity that cannot be recovered.

[0021] S2: Calculate the first part of the transmission and distribution asset recovery share of the distributed generation transaction allocation in a certain voltage level i, including:

[0022] 2.1) The recovery share of distributed generation transactions at voltage level i is divided into the recovery share of transmission and distribution assets transmitted at this voltage level and the recovery share of transmission and distribution assets transmitted at other voltage levels E a,i,green =E a,i,green,own +E a,i,green,other , where: E a,i,green E represents the share of transmission and distribution asset recovery that users of voltage level i and distributed power generators of voltage level a should bear in distributed power generation transactions, a,i,green,own It represents the share of transmission and distribution assets recovered by the distributed generation transaction at voltage level i, E a,i,green,other It represents the share of transmission and distribution assets recovered from this distributed generation transaction at other voltage levels.

[0023] 2.2) The voltage level of distributed generation equipment is usually low, and the electricity produced only needs to pass through the distribution network to be transmitted to the electricity user. Therefore, it is only necessary to allocate the investment share of the transmission and distribution assets from the user to the voltage level of the distributed power source step by step, specifically: E a,i,green,own =P a,i,i,green,sell / P i,green,trans ×R i,green , where: P a,i,i,green,sell P represents the amount of electricity that passes through the voltage level i line in the distributed power generation transaction between the voltage level i user and the voltage level a distributed power generator, i,green,trans represents the transmission and distribution capacity of distributed generation at voltage level i, R i,green The investment share of transmission and distribution assets allocated to distributed generation transactions at voltage level i is R i,green =P i,green,trans / (P i,green,trans +P i,nogreen,trans )×R i , where: P i,nogreen,trans represents the transmission and distribution volume of traditional electric energy trading at voltage level i, R i Represents the total investment share of transmission and distribution assets at voltage level i.

[0024] 2.3) Calculate the share of transmission and distribution assets recovered from distributed generation transactions at other voltage levels Where: P a,i,n,green,sell P represents the amount of electricity sold between users of voltage level i and distributed power generators of voltage level a that passes through lines of voltage level n. n,green,trans represents the transmission and distribution volume of distributed generation transactions at voltage level n, R n,green It represents the share of transmission and distribution asset investment in distributed generation transactions at voltage level n (the calculation method is not repeated here), and N represents the set of all voltage levels except voltage level i.

[0025] S3: Calculate the second part of the transmission and distribution asset recovery share of the distributed generation transaction allocation in a certain voltage level i, including:

[0026] 3.1) Calculate the actual transmission and distribution asset recovery share of the traditional power trading sales part Among them: F nogreen,equip,i P represents the share of transmission and distribution asset investment and operation at voltage level i that is actually recovered from traditional power trading. i,nogreen,sell represents the electricity sales of traditional electricity trading at voltage level i, P' i,trans It indicates the amount of transmission and distribution electricity at voltage level i when there is no distributed generation transaction and all electricity consumed by users is purchased from traditional energy sources of the upper-level power grid.

[0027] 3.2) Calculate the equipment fee E of voltage level i that should be recovered by traditional power trading nogreen,equip,i =E nogreen,equip,i,own +E nogreen,equip,i,other , where: E nogreen,equip,i represents the share of transmission and distribution assets of voltage level i that should be recovered by traditional power trading, E nogreen,equip,i,own In traditional power trading, E represents the share of transmission and distribution assets recovery for voltage level i that users of voltage level i should pay. nogreen,equip,i,other In traditional electricity trading, it indicates the share of power transmission and distribution asset recovery that users of other voltage levels should pay for power transmission and distribution at voltage level i; the share of power transmission and distribution asset recovery that users of this voltage level should pay for E nogreen,equip,i,own =P i,nogreen,sell / P i,nogreen,trans ×R i,nogreen , where: P i,nogreen,sell represents the electricity sales of traditional electricity trading at voltage level i, P i,nogreen,trans represents the transmission and distribution volume of traditional electric energy trading at voltage level i, R i,nogreen The share of transmission and distribution assets allocated to traditional power trading at voltage level i is R i,nogreen =P i,nogreen,trans / (P i,green,trans +P i,nogreen,trans )×R i ; The share of transmission and distribution asset recovery of voltage level i that should be paid by users of other voltage levels in traditional power trading Where: P m,nogreen,sell It represents the electricity sales volume of traditional electricity trading at voltage level m, where M represents the low voltage level label.

[0028] 3.3) Calculate the shortfall in the share of transmission and distribution assets recovered from traditional power trading at voltage level i shared by distributed generation trading users H nogreen,i =E nogreen,equip,i -F nogreen,equip,i, where: H nogreen,i It represents the shortfall in the investment recovery of voltage level i equipment and lines caused by traditional electric energy trading; H nogreen,i Simplify the calculation formula When the lowest voltage level for distributed generation to be traded is p, regardless of whether the electricity is distributed trading electricity, the electricity transmitted by the lower voltage level line comes from the higher voltage level, which is consistent with the traditional electricity coming from the higher voltage level. For low-voltage lines and equipment, whether there is distributed generation trading does not affect the total amount of electricity transmitted at that voltage level. The total amount of electricity transmitted at that voltage level remains unchanged to bear the share of transmission and distribution assets at that voltage level. In this case, the equipment fee of voltage level i that should be recovered by traditional electricity trading can be fully recovered, and there is no difference. P' q,trans =P q,green,trans +P q,nogreen,trans (q∈Q), where Q is the set of low voltage levels of voltage level p, then H nogreen,q =0, it is considered that when the voltage level of distributed generation put into transaction is p, the input electricity needs to bear the investment recovery shortfall of some equipment and lines of voltage level p and higher voltage levels.

[0029] 3.4) If Figure 4 As shown, the voltage level decreases from left to right, and the distributed input power E is calculated. in,i The recovery difference to be borne in: is the distributed input power E in,i The recovery difference to be borne, E in,i and E in,m are the distributed transaction power invested in voltage levels i and m, respectively. M is the set of voltage level j and its lower voltage level, and J is the set of voltage level i and its higher voltage level. E in,V2 Need to bear H nogreen,V1 and H nogreen,V2 Part of E in,V3 Need to bear H nogreen,V1 , H nogreen,V2 and H nogreen,V3 Part of E in,V2 、E in,V3 and E in,V4 All have to bear H nogreen,V1 The proportion of E in,V2 :E in,V3 :E in,V4 calculate.

[0030] 3.5) Calculate the shortfall in equipment and line investment recovery that users of different voltage levels i should bear when purchasing distributed energy of different voltage levels Where: H green,users,a,iE' represents the shortfall in equipment and line investment recovery that users of different voltage levels i should bear when purchasing distributed energy at voltage level a, in,a,i It represents the amount of electricity purchased by users at voltage level i from distributed power generators at voltage level a.

[0031] S4: Calculate the transmission and distribution cost based on the electricity sales of the transaction between a user at a certain voltage level i and a distributed power generator at voltage level a, specifically: the transmission and distribution cost per unit electricity of the distributed power generation transaction between a user at a certain voltage level i and a distributed power generator at voltage level a λ a,i,green =(H green,users,a,i +E a,i,green ) / P a,i,green,sell , where: a,i,green P represents the unit electricity transmission and distribution cost of the distributed power generation transaction between the user of voltage level i and the distributed power generator of voltage level a, a,i,green,sell It represents the amount of electricity traded between users at voltage level i and distributed power generators at voltage level a in distributed power generation transactions.

[0032] Based on the electricity sales data of customers with a flat rate electricity price in 2023, the electricity sales and permitted revenues for each voltage level are as follows: Figure 5 As shown, in this case, it is assumed that the 10kV branch feeds in 11.5 billion kWh of distributed energy, the 1kV branch feeds in 5.5 billion kWh of distributed energy, the 10kV branch distributed generator supplies 10.5 billion kWh of distributed energy to 10kV users, the 10kV branch distributed generator supplies 1 billion kWh of distributed generation to 1kV users, and the 1kV branch distributed generator supplies 5.5 billion kWh of distributed generation to 1kV users, as shown in FIG. Figure 6 As shown, it can be calculated that the distributed power generation transmission and distribution cost for 10kV users purchasing electricity from 10kV distributed power producers is 0.1939 yuan / kWh, the distributed power generation transmission and distribution cost for 1kV users purchasing electricity from 10kV distributed power producers is 0.2209 yuan / kWh, and the distributed power generation transmission and distribution cost for 1kV users purchasing electricity from 1kV distributed power producers is 0.1935 yuan / kWh, which can fully recover the transmission and distribution assets; if the existing distributed power generation transmission and distribution cost calculation method is adopted, it can be calculated that only 37.66 billion yuan of the 40.9 billion yuan of transmission and distribution assets can be recovered.

[0033] Compared with the prior art, the present invention increases the interpretability of the method for calculating the transmission and distribution costs of distributed power generation transactions; under the premise that the traditional power transaction transmission and distribution prices remain unchanged, the cross-subsidy method is used to ensure that the investment recovery of the power grid enterprise's transmission and distribution assets calculated by this method is more sufficient than other methods.

[0034] The above-mentioned specific implementation can be partially adjusted in different ways by those skilled in the art without departing from the principle and purpose of the present invention. The protection scope of the present invention shall be based on the claims and shall not be limited by the above-mentioned specific implementation. Each implementation scheme within its scope shall be subject to the constraints of the present invention.

Claims

1. A power transmission and distribution cost calculation system for distributed power generation transactions with matching rights and responsibilities, characterized in that: include: The analysis unit for the share of transmission and distribution asset recovery undertaken by distributed generation transactions, the calculation unit for the share of transmission and distribution asset recovery undertaken by distributed generation transactions, and the unit for calculating and publishing transmission and distribution costs of distributed generation transactions, wherein: the analysis unit for the share of transmission and distribution asset recovery undertaken by distributed generation transactions analyzes the share of transmission and distribution asset investment allocated to distributed generation transactions in each voltage level according to the share of distributed generation in the use of grid transmission and distribution assets and the impact on traditional electric energy transactions; the calculation unit for the share of transmission and distribution asset recovery undertaken by distributed generation transactions improves the calculation method based on the two parts of transmission and distribution asset recovery shares, and obtains the share that distributed generation should bear for the use of grid transmission and distribution assets and the shortfall in the recovery of traditional electric energy transmission and distribution assets caused by distributed generation; the calculation and publishing unit for transmission and distribution costs of distributed generation transactions calculates the distributed generation transmission and distribution costs of the corresponding voltage level according to the two parts of transmission and distribution asset recovery shares calculated in the previous unit and the electricity sales of distributed generation transactions at the voltage level.

2. The power transmission and distribution cost calculation system for distributed power generation transactions with matching rights and responsibilities according to claim 1 is characterized in that: The analysis unit for the recovery share of power transmission and distribution assets borne by distributed power generation transactions, according to the impact of distributed power generation transactions on traditional power transactions, compares the power transmission and distribution fees of traditional power transactions collected at the original rate with the power transmission and distribution asset recovery share that traditional power transactions should bear, and obtains the conclusion that the power transmission and distribution asset recovery share borne by distributed power generation transactions includes two parts, namely, the share that distributed power generation should bear for using power grid power transmission and distribution assets and the shortfall of traditional power transmission and distribution asset recovery caused by distributed power generation. The calculation unit for the power transmission and distribution asset recovery share borne by distributed power generation transactions includes: a calculation unit for the share that should be borne and a calculation unit for the shortfall of power transmission and distribution asset recovery, wherein: the calculation unit for the share that should be borne is calculated based on the total transmitted power of each voltage level, the power transmitted by distributed power generation and the power The share of transmission and distribution investment to be recovered at each voltage level is allocated in proportion, and the share of transmission and distribution asset recovery that distributed generation at each voltage level should bear for using grid transmission and distribution assets is obtained. The calculation unit for the shortfall in transmission and distribution asset recovery is based on the difference between the traditional electricity trading transmission and distribution fee charged at the original rate and the share of transmission and distribution asset recovery that traditional electricity trading should bear, and it is concluded that distributed generation input at a certain voltage level will not affect the recovery of traditional electricity transmission and distribution assets below this voltage level. On this basis, the difference in transmission and distribution asset recovery can be allocated in proportion to the input end of distributed generation, and then, according to the end-to-end electricity purchase method, the difference in transmission and distribution asset recovery can be transferred to the user end of distributed generation at each voltage level, and the shortfall in traditional electricity transmission and distribution asset recovery caused by distributed generation that users of different voltage levels need to bear is obtained.

3. A power transmission and distribution cost calculation system for distributed power generation transactions with matching rights and responsibilities, the characteristics of which are as follows: The distributed generation transaction transmission and distribution cost calculation and release unit includes: a distributed generation transmission and distribution cost calculation unit and a distributed generation transmission and distribution cost release unit, wherein: the distributed generation transmission and distribution cost calculation unit divides the transmission and distribution asset recovery share undertaken by the distributed generation transaction and the electricity sales of the distributed generation transaction part of each voltage level to obtain the distributed generation transmission and distribution cost, and the distributed generation transmission and distribution cost release unit releases the calculated distributed generation transmission and distribution cost to users and agents of each voltage level for charging.

4. A method for calculating the transmission and distribution cost of distributed generation transactions based on the rights and responsibilities matching of the system described in any one of claims 1 to 3, characterized in that: The power transmission and distribution and sales of each voltage level of the power grid are divided into two parts: traditional power trading and distributed power generation trading. On this basis, the recovery share of power transmission and distribution assets of each part is calculated according to the degree of use of power transmission and distribution assets by traditional power trading and distributed power generation trading. Then, under the premise of ensuring that the power transmission and distribution price of traditional power energy trading remains unchanged, the calculation rules of power transmission and distribution costs of distributed power generation trading are designed to ensure that the investment share of power transmission and distribution assets is fully recovered.

5. The method according to claim 4, characterized in that include: S1: Analyze the share of transmission and distribution asset recovery allocated to distributed generation transactions in a certain voltage level i to reflect the share of grid transmission and distribution assets used and the impact on traditional power transactions, including: ① Since distributed generation transactions use the power transmission and distribution assets of the power grid, it is necessary to apportion the share of power transmission and distribution asset recovery at the voltage level involved; ② Since distributed generation trading has led to a reduction in the volume of traditional electricity trading, distributed generation trading needs to bear the share of transmission and distribution asset recovery that cannot be recovered from this part of the electricity; S2: Calculate the first part of the transmission and distribution asset recovery share of the distributed generation transaction allocation in a certain voltage level i, including: 2.1) The recovery share of distributed generation transactions at voltage level i is divided into the recovery share of transmission and distribution assets transmitted at this voltage level and the recovery share of transmission and distribution assets transmitted at other voltage levels E a,i,green =E a,i,green,own +E a,i,green,other , where: E a,i,green E represents the share of transmission and distribution asset recovery that users of voltage level i and distributed power generators of voltage level a should bear in distributed power generation transactions, a,i,green,own It represents the share of transmission and distribution assets recovered by the distributed generation transaction at voltage level i, E a,i,green,other It represents the share of transmission and distribution assets recovered from the distributed generation transaction conducted at other voltage levels; 2.2) The voltage level of distributed generation equipment is usually low, and the electricity produced only needs to pass through the distribution network to be transmitted to the electricity user. Therefore, it is only necessary to allocate the investment share of the transmission and distribution assets from the user to the voltage level of the distributed power source step by step, specifically: E a,i,green,own =P a,i,i,green,sell / P i,green,trans ×R i,green , where: P a,i,i,green,sell P represents the amount of electricity that passes through the voltage level i line in the distributed power generation transaction between the voltage level i user and the voltage level a distributed power generator, i,green,trans represents the transmission and distribution capacity of distributed generation at voltage level i, R i,green The investment share of transmission and distribution assets allocated to distributed generation transactions at voltage level i is R i,green =P i,green,trans / (P i,green,trans +P i,nogreen,trans )×R i , where: P i,nogreen,trans represents the transmission and distribution volume of traditional electric energy trading at voltage level i, R i represents the total investment share of transmission and distribution assets at voltage level i; 2.3) Calculate the share of transmission and distribution assets recovered from distributed generation transactions at other voltage levels Where: P a,i,n,green,sell P represents the amount of electricity sold between users of voltage level i and distributed power generators of voltage level a that passes through lines of voltage level n. n,green,trans represents the transmission and distribution volume of distributed generation transactions at voltage level n, R n,green It represents the investment share of transmission and distribution assets allocated to distributed generation transactions at voltage level n (the calculation method is not repeated here), and N represents the set of all voltage levels except voltage level i; S3: Calculate the second part of the transmission and distribution asset recovery share of the distributed generation transaction allocation in a certain voltage level i, including: 3.1) Calculate the actual transmission and distribution asset recovery share of the traditional power trading sales part Among them: F nogreen,equip,i P represents the share of transmission and distribution asset investment and operation at voltage level i that is actually recovered from traditional power trading. i,nogreen,sell represents the electricity sales of traditional electricity trading at voltage level i, P′ i,trans It indicates the transmission and distribution volume of voltage level i when there is no distributed generation transaction and all the electricity consumed by users is purchased from the traditional energy sources of the upper power grid; 3.2) Calculate the equipment fee E of voltage level i that should be recovered by traditional power trading nogreen,equip,i =E nogreen,equip,i,own +E nogreen,equip,i,other , where: E nogreen,equip,i represents the share of transmission and distribution assets of voltage level i that should be recovered by traditional power trading, E nogreen,equip,i,own In traditional power trading, E represents the share of transmission and distribution assets recovery for voltage level i that users of voltage level i should pay. nogreen,equip,i,other In traditional electricity trading, it indicates the share of power transmission and distribution asset recovery that users of other voltage levels should pay for power transmission and distribution at voltage level i; the share of power transmission and distribution asset recovery that users of this voltage level should pay for E nogreen,equip,i,own =P i,nogreen,sell / P i,nogreen,trans ×R i,nogreen , where: P i,nogreen,sell represents the electricity sales of traditional electricity trading at voltage level i, P i,nogreen,trans represents the transmission and distribution volume of traditional electric energy trading at voltage level i, R i,nogreen The share of transmission and distribution assets allocated to traditional power trading at voltage level i is R i,nogreen =P i,nogreen,trans / (P i,green,trans +P i,nogreen,trans )×R i ; The share of transmission and distribution asset recovery of voltage level i that should be paid by users of other voltage levels in traditional power trading Where: P m,nogreen,sell It indicates the sales volume of traditional electric energy trading with voltage level m, and M indicates the low voltage level number; 3.3) Calculate the shortfall in the share of transmission and distribution assets recovered from traditional power trading at voltage level i shared by distributed generation trading users H nogreen,i =E nogreen,equip,i -F nogreen,equip,i , where: H nogreen,i It represents the shortfall in the investment recovery of voltage level i equipment and lines caused by traditional electric energy trading; H nogreen,i Simplify the calculation formula When the lowest voltage level for distributed generation to be traded is p, regardless of whether the electricity is distributed trading electricity, the electricity transmitted by the lower voltage level line comes from the higher voltage level, which is consistent with the traditional electricity coming from the higher voltage level; for low-voltage lines and equipment, whether there is distributed generation trading does not affect the total amount of electricity transmitted at that voltage level, and the total amount of electricity transmitted at that voltage level remains unchanged to bear the share of transmission and distribution assets at that voltage level. In this way, the equipment fee of voltage level i that should be recovered by traditional electricity trading can be fully recovered, and there is no difference, P′ q,trans =P q,green,trans +P q,nogreen,trans (q∈Q), where Q is the set of low voltage levels of voltage level p, then H nogreen,q =0, it is considered that when the voltage level of distributed generation put into transaction is p, the input electricity needs to bear the investment recovery shortfall of some equipment and lines of voltage level p and higher voltage levels; 3.4) The voltage level decreases from left to right, and the distributed input power E is calculated. in,i The recovery difference to be borne in: is the distributed input power E in,i The recovery difference to be borne, E in,i and E in,m are the distributed transaction power invested in voltage levels i and m, respectively. M is the set of voltage level j and its lower voltage level, and J is the set of voltage level i and its higher voltage level. E in,V2 Need to bear H nogreen,V1 and H nogreen,V2 Part of E in,V3 Need to bear H nogreen,V1 , H nogreen,V2 and H nogreen,V3 Part of E in,V2 、E in,V3 and E in,V4 All have to bear H nogreen,V1 The proportion of E in,V2 :E in,V3 :E in,V4 calculate; 3.5) Calculate the shortfall in equipment and line investment recovery that users of different voltage levels i should bear when purchasing distributed energy of different voltage levels Where: H green,users,a,i E′ represents the shortfall in equipment and line investment recovery that users of different voltage levels i should bear when purchasing distributed energy at voltage level a. in,a,i represents the amount of electricity purchased by users at voltage level i from distributed power generators at voltage level a; S4: Calculate the transmission and distribution cost based on the electricity sales of the transaction between a user at a certain voltage level i and a distributed power generator at voltage level a, specifically: the transmission and distribution cost λ of the distributed power generation transaction between a user at a certain voltage level i and a distributed power generator at voltage level a a,i,green =(H green,users,a,i +E a,i,green ) / P a,i,green,sell , where: a,i,green P represents the transmission and distribution cost of the distributed power generation transaction between users of voltage level i and distributed power producers of voltage level a, a,i,green,sell It represents the amount of electricity traded between users at voltage level i and distributed power generators at voltage level a in distributed power generation transactions.

Images