CN-121998764-A - Power micro-market clearing method and system based on power distribution network

CN121998764ACN 121998764 ACN121998764 ACN 121998764ACN-121998764-A

Abstract

The invention belongs to the technical field of electric power market clearing, and particularly discloses an electric power micro-market clearing method and system based on a power distribution network, wherein the method comprises the following steps of obtaining distributed resource data and micro-market clearing data; the method comprises the steps of carrying out energy block matching based on distributed resource data and micro-market clearing data to obtain a clearing scheme, wherein the clearing scheme comprises negotiated micro-market transaction electric quantity, micro-market transaction electricity price and deviation electric quantity, carrying out power flow constraint verification based on the clearing scheme, executing the clearing scheme meeting the power flow constraint verification and carrying out settlement according to an execution result. The invention can solve the adaptability problem of the distributed resource and the electric power trade market, and realize the efficient participation of the distributed resource, the on-site consumption of new energy and the safe operation of the power grid.

Inventors

YU SHAOYUAN
ZHOU XIANG
WEI XIAO
CHEN AILIN
WEI TAO
GENG JIAN
Jin Luosong
LIU WEIDONG
CAO JIANWEI
HE YANG
Lv Ruiyang
Huang Juantao
HUANG HENGZI
WU JINGYING

Assignees

中国电力科学研究院有限公司
浙江电力交易中心有限公司
国家电网有限公司

Dates

Publication Date: 20260508
Application Date: 20260123

Claims (10)

1. The electric power micro-market clearing method based on the power distribution network is characterized by comprising the following steps of: Acquiring distributed resource data and micro-market clear data; Performing energy block matching based on distributed resource data and micro-market clearing data to obtain a clearing scheme, wherein the clearing scheme comprises negotiated micro-market transaction electric quantity, micro-market transaction electric price and deviation electric quantity; Carrying out load flow constraint verification based on the clearing scheme; executing the clearing scheme meeting the power flow constraint verification and settling according to the execution result.
2. The distribution network-based power micro-market clearing method according to claim 1, wherein, Performing energy block matching based on distributed resource data and micro-market clearing data to obtain a clearing scheme, including: The method comprises the steps of taking maximized social welfare as a target, and constructing an objective function based on micro-market clearing data, wherein the micro-market clearing data comprises electricity selling prices of a power generation main body in each period, electricity purchasing prices of a load main body in each period and transaction electric quantity of the power generation main body and the load main body in each period; Determining constraint conditions of an objective function based on distributed resource data, wherein the distributed resource data comprises resource types, voltage levels and corresponding maximum output or maximum load of distributed resources participating in clearing, and the resource types comprise a power generation main body and a load main body; And solving the objective function by adopting an intelligent heuristic algorithm based on the constraint condition to obtain a clear scheme.
3. The distribution network-based electric power micro-market clearing method according to claim 2, wherein, The formula of the objective function is as follows: ; Wherein, the Is a collection of power generation bodies; t is the number of time periods in the clearing period; Is a main body of power generation In the time period To the electricity selling price of (2); Is a load main body In the time period Is a purchase price of electricity; Is a main body of power generation And a load main body In the time period Is used to measure the amount of electricity.
4. The distribution network-based electric power micro-market clearing method according to claim 2, wherein, The constraint conditions comprise electric quantity balance constraint and capacity constraint; the electric quantity balance constraint formula is as follows: ; the capacity constraint formula is as follows: ; in the formula, In order for the collection of power generation bodies, For a collection of load bodies, Is a main body of power generation In the time period Is used for selling electricity quantity; Is a load main body In the time period Is a purchase of electricity; Is a main body of power generation In the time period Is a maximum force of the (c).
5. The distribution network-based power micro-market clearing method according to claim 1, wherein, And carrying out a power flow constraint verification step based on the clearing scheme, wherein the power flow constraint is as follows: ; in the formula, For the actual power flow, Maximum bearing power for the trading node.
6. The distribution network-based power micro-market clearing method according to claim 1, wherein, The settlement content comprises distributed photovoltaic electric charge, electric charge of industrial and commercial users and energy storage income in the settlement step according to the execution result and the execution of the clearing scheme meeting the trend constraint check; The distributed photovoltaic electricity charge is calculated according to the following formula: ; in the formula, The method is distributed photovoltaic electricity charge; Trade electricity for micro-markets; the price of electricity is traded for the micro-market, In order to meter the quantity of electricity, The price of the package; the electricity charge of the business user is calculated according to the following formula: ; in the formula, The electric charge is the electric charge of the business user; Is that A voltage class power transmission and distribution price; The energy storage benefit is calculated according to the following formula: ; in the formula, Is energy storage income; In order to obtain the discharge quantity, In order to be able to price the discharge, As the amount of charge, And is the charging price.
7. The distribution network-based power micro-market clearing method according to claim 1, wherein, In the clearing scheme for executing the verification meeting the trend constraint and carrying out the clearing step according to the execution result, clearing is carried out through single-system power transmission and distribution price or clearing is carried out through two-system power transmission and distribution price; The calculation formula of the single-system power transmission and distribution price is as follows: ; Wherein, the A power transmission and distribution price for micro-market transactions; Trade electricity for micro-markets; Is that A voltage class power transmission and distribution price; the calculation formula of the electricity price of the two systems is as follows: ; in the formula, In order to pay the net charge for the net, In order to charge for the capacity of electricity, Is a spare fee.
8. Electric power micro-market clearing device based on distribution network, its characterized in that includes: The data acquisition module is used for acquiring distributed resource data and micro-market clear data; The centralized competitive price trading module is used for performing energy block matching based on distributed resource data and micro-market clearing data to obtain a clearing scheme, wherein the clearing scheme comprises negotiated micro-market trading electric quantity, micro-market trading electric price and deviation electric quantity; the safety check module is used for carrying out load flow constraint check based on the clearing scheme; And the clearing and settlement module is used for executing a clearing scheme meeting the power flow constraint verification and performing settlement according to an execution result.
9. An electronic device comprising a processor and a memory, the processor configured to execute a computer program stored in the memory to implement the distribution grid-based power micro-market clearing method of any one of claims 1-7.
10. A computer readable storage medium storing at least one instruction that when executed by a processor implements the distribution grid-based power micro-market clearing method of any one of claims 1-7.

Description

Power micro-market clearing method and system based on power distribution network Technical Field The invention belongs to the technical field of electric power market clearing, and particularly relates to an electric power micro-market clearing method and system based on a power distribution network. Background In the new power system construction process taking new energy as a main body, distributed resources including distributed photovoltaics, distributed energy storage, adjustable loads, electric automobiles and the like are becoming increasingly the key force for converting a push energy structure, so that more renewable energy access systems can be effectively stimulated, energy production and consumption are promoted, and the novel power system construction process is also an important support for constructing a clean, safe and efficient modern energy system. However, since the distributed resource generally has typical characteristics of 'main body is more, electric quantity is small and distribution is scattered', the distributed resource faces a series of structural and mechanical adaptation problems under the existing power market mechanism taking the centralized resource as a dominant, and the large-scale and efficient development of the distributed resource is restricted. On the one hand, the trading mechanism is not matched, and the market admission has a barrier. The current electric power market system of China mainly surrounds the design of large power supplies and large power grids, and a centralized power generation main body is mainly served by trade varieties, a clear mode and market boundaries. The distributed resource points are wide in multiple aspects and are mostly located on the power distribution network side or the user side, and the characteristics of small scale and scattered positions cause difficulty in reaching the admission threshold of the existing centralized market. The low-voltage-class resources lack effective market participation paths and mechanism interfaces, so that the low-voltage-class resources cannot enter provincial and above power transaction platforms with equal principal identities. On the other hand, the absorption mechanism is contradicted with the operation reality, and the local balance capability is insufficient. With the continuous increase of the new energy installation ratio, distributed photovoltaics and the like are connected in a concentrated manner in a local area, and the fluctuation and intermittence of the power generation output bring significant pressure to the operation of the power distribution network. Especially in the afternoon photovoltaic output peak period, due to the lack of an effective nearby digestion mechanism and flexible adjustment means, the problem of light rejection is easily caused by line transmission capacity limitation or overload of a transformer. Meanwhile, reverse power transmission of a large number of distributed power supplies causes aggravation of voltage fluctuation and reverse power flow of the power distribution network, and can cause voltage out-of-limit or overload of lines, thereby threatening safe and stable operation of the system. In addition, the settlement logic is imperfect, and the transparency of the market and the definition of rules are insufficient. The electric charge settlement, the charge allocation and the deviation processing mechanism after the distributed resources participate in the market transaction and are finished are not mature. At present, the settlement between a large number of source network charge storage multi-bodies at the distribution network side or in the micro-network still depends on off-site negotiation or contract agreement, and a transparent marketization settlement platform and standard flow are lacked. This affects not only the settlement efficiency but also easily causes disputes. Therefore, the distributed resource is pushed to play a role in the power system, so that not only is the power market system pushed to reform towards the distributed and intelligent direction, but also a set of micro-market clearing system adapting to the scene of the power distribution network is needed to be constructed so as to solve the problems. Disclosure of Invention The invention aims to provide a power micro-market clearing method and system based on a power distribution network, which are used for solving the adaptability problem of distributed resources and a power transaction market and realizing efficient participation of the distributed resources, on-site consumption of new energy and safe operation of a power grid. In order to achieve the above purpose, the invention adopts the following technical scheme: According to one aspect of the invention, there is provided a method for electric power micro-market clearing based on a distribution network, comprising the steps of: Acquiring distributed resource data and micro-market clear data; Performing energy block matching base