CN-121998158-A - Green electricity-conventional electricity same-platform clearing method for overall social welfare optimization

CN121998158ACN 121998158 ACN121998158 ACN 121998158ACN-121998158-A

Abstract

A green electricity-conventional electricity same-platform clearing method for the optimal overall social welfare comprises 1) disassembling an electricity transaction of a green electricity market into two types of electric energy service and environment attribute, 2) obtaining price declarations of supply and demand on the electric energy service and the environment attribute respectively, 3) constructing a green electricity-conventional electricity same-platform competing clearing model for the optimal overall social welfare, 4) inputting the price declarations of supply and demand on the electric energy service and the environment attribute respectively into the green electricity-conventional electricity same-platform competing clearing model for the optimal overall social welfare to obtain an optimal electric energy price and an optimal environment attribute clearing price, and 5) determining the electricity transaction clearing price of the green electricity market based on the optimal electric energy price and the optimal environment attribute clearing price. The invention can be widely applied to the same-stage clear scene of green electricity and conventional electricity, and can provide basis for the design of a collaborative development mechanism of green electricity transaction and conventional electricity transaction.

Inventors

XIANG MINGXU
ZOU RUI
YANG ZHIFANG

Assignees

重庆大学

Dates

Publication Date: 20260508
Application Date: 20251216

Claims (10)

1. The green electricity-conventional electricity same-station clearing method for the optimal overall social welfare is characterized by comprising the following steps of: 1) The power transaction of the green power market is disassembled into two types of electric energy service and environmental attribute; 2) Acquiring the price declaration of the supply and demand double sides on the electric energy service and the environmental attribute respectively; 3) Constructing a green electricity-conventional electricity same-platform competition clearing model oriented to overall social welfare optimization; 4) Inputting the price declaration of the supply and demand sides to the electric energy service and the environmental attribute respectively into a green electricity-conventional electricity same competition clearing model facing the optimal overall social welfare to obtain an optimal electric energy price and an optimal environmental attribute clearing price; 5) And determining the power transaction settlement price of the green power market based on the optimal electric energy clearing price and the optimal environment attribute clearing price.
2. The global social welfare-oriented optimal green electricity-conventional electricity co-generation method of claim 1, wherein the supply and demand sides comprise a supply side and a demand side; the supply side comprises a conventional energy unit and a new energy unit; the demand side comprises a user; the power transactions of the green power market include conventional power energy transactions and green power energy transactions.
3. The green electricity-conventional electricity same-platform clearing method for optimizing overall social welfare according to claim 2, wherein the conventional energy unit comprises a thermal power unit and a hydroelectric unit; The new energy unit comprises a wind turbine generator and a photoelectric unit.
4. The method for clearing green electricity and conventional electricity for the overall social welfare optimization according to claim 2, wherein the statement of the price of the electric energy service comprises a statement of the conventional electric energy of a user, a statement of the conventional electric energy of a conventional energy unit, a statement of the conventional electric energy Shen Baoliang of a new energy unit and a statement of the conventional electric energy of a new energy unit.
5. The global social welfare-oriented optimal green electricity-conventional electricity co-generation clearing method according to claim 2, wherein the declaration of the environment attribute comprises a declaration amount of green electricity energy of a user, an environment attribute quotation of the user, green electricity energy Shen Baoliang of a new energy unit and an environment attribute quotation of the new energy unit.
6. The global-social-benefit-optimal green electricity-conventional electricity co-generation clearing method according to claim 2, wherein the objective function of the global-social-benefit-optimal green electricity-conventional electricity co-generation clearing model is as follows: (1) in the formula, Representing a user index; An energy unit index indicating the supply side; T represents a transaction period index; 、 respectively users Energy unit Conventional electric energy quotations of (2); 、 respectively users Energy unit Is used for discharging and clearing electric quantity; 、 respectively users New energy unit Is set, the environmental attribute quotation of (1); 、 respectively users New energy unit Is clear of the environmental properties of (a).
7. The global-social-benefit-optimal green electricity-conventional electricity same-platform clearing method according to claim 2, wherein constraint conditions of the global-social-benefit-optimal green electricity-conventional electricity same-platform competition clearing model comprise balance constraint of electric energy and environmental attribute supply and demand, purchase-sale-entity electric energy clearing constraint, purchase-sale-entity environmental attribute clearing constraint and line trend constraint.
8. The method for green electricity-conventional electricity co-generation clearing for overall social welfare optimization according to claim 7, wherein the balance constraint of the electricity energy and the environmental attribute is as follows: (2) (3) in the formula, Representing a user index; An energy unit index indicating the supply side; T represents a transaction period index; 、 respectively users Energy unit Is used for discharging and clearing electric quantity; 、 respectively users New energy unit The clear amount of the environmental attribute of (2); 、 The dual multipliers are respectively used for the balance constraint of the supply and demand of the electric energy and the balance constraint of the supply and demand of the environmental attribute; the energy output clear constraint of the purchasing main body is as follows: (4) (5) in the formula, 、 Respectively users Energy unit The total declaration amount of the electric energy meter; 、、、 the two pairs of multipliers are all the pairs of which the energy of the main body of the purchase and sale is clear and restrained; The definition constraint of the purchase and sale main body environment attribute is as follows: (6) (7) in the formula, Green electricity demand ratio declared for users; 、、、 the two pairs of multipliers with clear constraint are all purchased and sold main environmental attributes; The line flow constraints are as follows: (8) in the formula, Indexing the lines; 、 Respectively the lines Upper and lower limits of power transfer; Is an energy unit The injection power of the node is relative to the line A power transfer distribution factor of (2); For users The injection power of the node is relative to the line A power transfer distribution factor of (2); 、 Are all the dual multipliers of the line flow constraint.
9. The green electricity-conventional electricity same-platform clearing method for optimizing overall social welfare according to claim 8, wherein the optimal electricity measurement clearing price and the optimal environment attribute clearing price are as follows: (9) (10) in the formula, 、 Respectively representing the optimal electric energy clearing price and the optimal environment attribute clearing price; 、 The dual multipliers respectively represent the electric energy supply and demand balance constraint and the environment attribute supply and demand balance constraint; indexing the lines; indicating the index of the node where the user and the energy unit are located, Representing nodes Injection power versus line A power transfer distribution factor of (2); 、 Are all the dual multipliers of the line flow constraint.
10. The method for green electricity-conventional electricity co-generation clearing for overall social benefit optimization according to claim 9, wherein the conventional electricity energy transaction clearing price is ; The green electricity energy transaction settlement price is 。

Description

Green electricity-conventional electricity same-platform clearing method for overall social welfare optimization Technical Field The invention relates to the technical field of electric power systems and automation thereof, in particular to a green electricity-conventional electric power same-platform clearing method for optimizing welfare of the whole society. Background The trading forms of the green power market comprise green power trading of 'electricity evidence integration' and green evidence trading of 'electricity evidence separation', and the purpose is to promote green power consumption through the marketization form and simultaneously meet the green power consumption requirement of users. The green electricity transaction belongs to one of medium-long term transaction of electric power, and follows the basic rules of the medium-long term transaction. Compared with green card transaction, the characteristic of 'card electricity integration' ensures that the green attribute of the electric quantity calculated by the green electricity transaction has higher acceptance internationally. In green electricity trade, green electricity suppliers can increase their own income, and demand parties can create green enterprise images. Green electricity trading has become a key way to dredge the green value of new energy. In order to effectively embody the green value of new energy, the development of green electricity trade should meet the following market operation targets that 1) the maximization of the overall social benefit of green electricity trade and conventional electricity trade is realized, 2) the electric energy part of green electricity trade is homogeneous with conventional electricity trade, the market price is unified, 3) the green electricity price is detachable, and the total price is higher than the conventional electric energy price so as to embody the additional environmental value contained in the green electricity, and meanwhile, the environmental price component and the electric energy price component should reflect the market supply and demand relationship. Under the existing market mechanism, green electricity trading markets in most areas are independently organized before non-green electricity trading markets, and the residual power demand after the green electricity trading is finished is participated in conventional medium-long-term trading of power only aiming at electric energy service. The green electricity trade clearing link obtains market total price signals (comprising electric energy price and environment price) according to the total price declared by the new energy and the user, and the green evidence market average price in the previous settlement period is used as the environment price, and the rest is used as the electric energy price, so that the green electricity total price is decomposed. However, the sub-platform market competition mode of the preferential development of the green electricity trade focuses on the maximization of the social benefit of the green electricity trade, neglects the conventional electricity trade with larger social benefit, causes the loss of the overall social benefit of the system, does not meet the market operation target 1), and leads the market main body to dynamically report the own green electricity demand. In addition, green electricity transaction and conventional electricity transaction under the market mechanism are priced separately according to the price declaration condition of the respective main body, on one hand, green electricity price cannot be ensured to be higher than conventional electricity energy price, on the other hand, scientific decomposition of green electricity price cannot be realized, the current green electricity demand cannot be accurately embodied based on the decomposition mode of green evidence average price in the last settlement period, and the unified price of green electricity energy and conventional electricity energy cannot be ensured, and the market operation targets 2) and 3) cannot be met. In summary, the current green electricity-conventional power transaction mechanism cannot effectively meet the market operation target, but failure to realize the overall social benefit optimization of the system is a key element causing the problem, and the related market clearing method is still to be researched. Disclosure of Invention The invention aims to provide a green electricity-conventional power same-platform clearing method for optimizing overall social welfare, which comprises the following steps: 1) And the electric power transaction of the green electric power market is disassembled into two types of electric energy service and environmental attribute. 2) And acquiring the price declaration of the supply and demand double sides on the electric energy service and the environmental attribute respectively. 3) And constructing a green electricity-conventional electricity same-platform competition