CN-121998328-A - Mining area comprehensive energy system optimization scheduling method coupling gravity energy storage and CCUS-P2G

Abstract

The invention discloses a mining area comprehensive energy system optimization scheduling method for coupling gravity energy storage and CCUS-P2G, which comprises the steps of constructing a mining area comprehensive energy system framework comprising gravity energy storage and CCUS-P2G coupling, establishing a vertical shaft type gravity energy storage device model, realizing the mutual conversion of electric energy and gravity potential energy through the vertical displacement of a heavy object, establishing a CCUS-P2G coupling model, synthesizing methane in a methane reactor by carbon dioxide trapped by the CCUS device and hydrogen generated by an electrolytic tank in two-section P2G, establishing a blending gas turbine model, blending methane generated according to the CCUS-P2G coupling model with gas in coal bed gas in the mining area to obtain gas meeting the combustion concentration requirement of the gas turbine, and constructing a system optimization scheduling model considering a stepped carbon transaction mechanism, and solving on the premise of meeting the power balance constraint of the system by taking the total cost of the system as an objective function. The invention overcomes the defects of low utilization rate of associated energy sources in mining areas, waste of waste mine resources, difficulty in considering low carbon property and economy of a single energy system and the like in the prior art to a certain extent.

Inventors

• LUO ZHAO
• LI FANGSHUN
• YAN HUAN
• Mao Chaofan
• WANG YUQIN
• XU WANCHENG
• YUAN HAI
• ZHANG YANG
• LIU DEWEN
• ZHANG TAO
• SHEN XIN
• LI CHAO
• LIANG JUNKAI
• LI JIAHAO

Assignees

• 昆明理工大学

Dates

Publication Date

20260508

Application Date

20260119

Claims (5)

1. 1. The mining area comprehensive energy system optimization scheduling method for coupling the gravity energy storage and the CCUS-P2G is characterized by comprising the following steps of: S1, constructing a mining area comprehensive energy system framework containing gravity energy storage and CCUS-P2G coupling, wherein the mining area comprehensive energy system containing the gravity energy storage and the CCUS-P2G coupling comprises an energy supply unit, an energy conversion unit, an energy storage unit and a CCUS-P2G coupling unit, wherein the energy storage unit at least comprises a gravity energy storage device established by utilizing a abandoned mine, the CCUS-P2G coupling unit comprises a CCUS device and a two-section P2G, and the CCUS device provides a carbon source for methanation of the two-section P2G; s2, a vertical shaft type gravity energy storage device model is established, and the mutual conversion of electric energy and gravitational potential energy is realized through the vertical displacement of the weight; s3, establishing a CCUS-P2G coupling model, and synthesizing methane by carbon dioxide trapped by a CCUS device and hydrogen generated by an electrolytic tank in the two-stage P2G in a methane reactor; S4, establishing a mixed gas turbine model, and mixing the methane generated in the S3 with the gas in the coalbed methane in the mining area to obtain the gas meeting the combustion concentration requirement of the gas turbine; and S5, constructing a system optimization scheduling model considering a ladder-type carbon transaction mechanism, and solving on the premise of meeting the system power balance constraint by taking the minimum total cost of the system as an objective function.
2. 2. The mining area comprehensive energy system optimization scheduling method for coupling the gravity energy storage and the CCUS-P2G according to claim 1, wherein the CCUS-P2G coupling model comprises a CCUS device model, an electrolytic tank model, a methanation model and an HFC model.
3. 3. The mining area integrated energy system optimization scheduling method for coupling gravity energy storage and CCUS-P2G according to claim 1, wherein the blending gas turbine model is specifically: ; ; Wherein: 、 Respectively is Electric power and thermal power output by the gas turbine at the moment; 、 The electric power conversion coefficient and the energy loss rate of the gas turbine are respectively; Is the lower heating value of natural gas; Maximum output power for the gas turbine; 、 The upper limit and the lower limit of the climbing power of the gas turbine are respectively; Is that The volume of methane produced by the methane reactor at the moment; Is that The volume of methane produced by the methane reactor for blending at the moment; And Is divided into The volume of methane stored and released by the methane storage tank at any time; Is that The volume of methane after mixing at the moment; Is that Methane volume in coalbed methane at the moment; 、 、 Is that After mixing at the moment, the methane volume fraction of the coalbed methane is produced by the methane reactor; 、 the lowest and highest methane volume fractions available for combustion, respectively.
4. 4. The mining area comprehensive energy system optimization scheduling method for coupling gravity energy storage and CCUS-P2G according to claim 1, wherein the objective function of the system optimization scheduling model considering the stepwise carbon transaction mechanism is as follows: ; ; Wherein, the For the cost of the system to purchase energy, In order to discard the energy penalty costs, For the cost of operation and maintenance of the equipment, For the cost of carbon sequestration, Cost for carbon trade; Is that Time step carbon transaction cost; Representing the total scheduling period.
5. 5. A mining area integrated energy system optimization scheduling system coupling gravity energy storage and CCUS-P2G, characterized by comprising the module of the mining area integrated energy system optimization scheduling method coupling gravity energy storage and CCUS-P2G according to any one of claims 1-4.

Description

Mining area comprehensive energy system optimization scheduling method coupling gravity energy storage and CCUS-P2G Technical Field The invention relates to the technical field of comprehensive energy system and electric power system operation control, in particular to an optimization scheduling method for a mining area comprehensive energy system, which is formed by constructing gravity energy storage by utilizing a abandoned mine and combining carbon capture and electric conversion technology and is used for coupling the gravity energy storage with a CCUS-P2G. Background Coal is used as a global important primary energy source, and the exploitation process is often accompanied with the generation of a large amount of associated energy sources such as gas, ventilation air methane, water surge, coal gangue and the like. According to statistics, the resources such as coal mine gas, mine water burst and the like are huge in reserves, but a coarser energy utilization and management mode is generally adopted in the mining area at present, so that associated energy with high recovery value is often directly discharged or abandoned, serious resource waste is caused, and the ecological environment around the mining area is polluted. In order to solve the problems, the concept of a mining area comprehensive energy system (CMIES) has been developed, and the aim is to promote economic low-carbon cooperation of electric power and heat energy by coordinating and optimizing the mutual conversion and cascade utilization of various energy sources in the mining area. Related studies have been conducted for optimal scheduling of CMIES at present. The mining area comprehensive energy system collaborative optimization scheduling [ J ] based on carbon capture-electric conversion is carried out in the literature Luo, luo Mengshun, shen Xin and the like, the electric power system automation is carried out in 2024,48 (03): 22-30 ', the associated energy utilization and carbon capture-electric conversion coupling unit is introduced in CMIES, the low-carbon economy of CMIES is improved, the literature Liang, li Mei, zhou Mengran, the mine comprehensive energy system multi-target optimization scheduling [ J ]. Electric power automation equipment containing P2G and hybrid electric energy storage is carried out in 2021,41 (10): 122-129 ' the hybrid electric energy storage technology is utilized to promote the absorption, the energy utilization efficiency and economy of CMIES are improved, the literature Huang Hongxu, liang Rui, zhang Xiaotong and the like are introduced in the literature 2022,46 (05): 1731-1742 ', the coal mine comprehensive energy system multi-target configuration double-layer optimization [ J ]. The electric network technology is constructed according to the coal gangue, The multi-energy complementary system of coal bed gas and water burst optimizes CMIES energy utilization structure, improves CMIES economy, and promotes CMIES associated energy utilization through multi-energy flow coupling in the document "HUANG Hongxu,LIANG Rui,LV Chaoxian,et al．Two-stage robust stochastic scheduling for energy recovery in coal mine integrated energy system[J]．Applied Energy,2021(290):116759．". In the prior art, although researches have been proposed to consider an operation model for recovering energy resources, or to utilize single associated energy (such as recovering mine water heat energy by using a heat pump, improving low-concentration gas conversion efficiency by using a catalyst, extracting coal gangue heat energy by using a heat pipe, and the like). However, most of the existing researches only focus on the utilization of single associated energy sources in mining areas, or do not fully consider the cooperation with renewable energy sources such as wind power, photovoltaics and the like, and lack systematic researches of comprehensive complementation of multiple energy sources. On the other hand, the periphery of the mining area is generally provided with abundant wind and light resources, and the method is suitable for building distributed wind power and photovoltaic power stations. Along with the high-proportion grid connection of renewable energy sources, the configuration of an energy storage system becomes a key for guaranteeing the safety of a power grid and promoting the digestion. In a plurality of energy storage technologies, the vertical shaft type gravity energy storage reconstructed by using the abandoned mine has the advantages of low construction cost, high safety, flexible site selection and the like, and is very suitable for mining area scenes. However, the research on the construction of gravity energy storage by using abandoned mines in mining areas is less at present, and the potential of the gravity energy storage in the aspects of stabilizing fluctuation and peak clipping and valley filling is not fully exploited. In addition, in the context of low carbonization transformation, carbon capture