Control method of energy power system based on carbon emission reduction

Abstract

The invention belongs to the technical field of power control, and discloses a control method of an energy power system based on carbon emission reduction, and the control method of the energy power system specifically comprises the following steps: building a cost calculation model of the energy power system based on the expenditure cost and income cost of the energy power system; and acquiring operation parameters of the energy power system in the previous day, inputting the operation parameters into the cost calculation model, finding out the optimal output power of each device in the energy power system under the condition of meeting constraint conditions, and taking the optimal output power of each device in the energy power system as the actual output power of each device in the energy power system in the next day. The cost output by the cost calculation model for building the energy power system is minimum; the income cost is obtained by selling natural gas converted from CO2. The CO2 emission of the energy power system is reduced, and the fluidity between CO2 and clean energy is improved, so that the low-carbon economic transformation of the energy power system is promoted.

Description

Technical Field

[0001] The present invention belongs to the field of power control technology, and more specifically, the present invention relates to an energy power system control method based on carbon emission reduction. Background Art

[0002] The new power system is a power system that aims to achieve carbon peak and carbon neutrality, and has the basic characteristics of clean and low-carbon, safe and controllable, flexible and efficient, intelligent and friendly, open and interactive. With the gradual increase in the proportion of new energy installed capacity, the operation mode of the power system has become diversified, decentralized, and differentiated, and its operation and planning characteristics have also undergone fundamental changes.

[0003] In the context of global climate change, countries are increasingly restricting carbon emissions. As one of the main sources of carbon emissions, the power system is facing tremendous pressure to reduce emissions. Therefore, when building a new power system, it is necessary to fully consider the coordination and optimization between the source (energy production and supply side), the network (energy transmission network), and the load (user load on the energy demand side). How to minimize carbon emissions and maximize energy efficiency is an urgent problem to be solved. Summary of the invention

[0004] The present invention provides a control method for an energy power system based on carbon emission reduction, aiming to reduce the CO 2 Emissions, increasing CO 2 and clean energy to promote the low-carbon economic transformation of the energy and power system.

[0005] The present invention is implemented as follows: a control method for an energy power system based on carbon emission reduction, the energy power system comprises: an energy power station, a pollution centralized treatment station, a carbon capture and storage device, and a P2G device connected in sequence, wherein the P2G device collects part of the CO2 collected by the carbon capture and storage device. 2 Converted into natural gas, the control method of the energy power system is as follows:

[0006] (1) Construct a cost calculation model for the energy and power system based on the expenditure cost and revenue cost of the energy and power system;

[0007] (2) Collect the operating parameters of the energy and power system on the previous day, input them into the cost calculation model, find the optimal output power of each device in the energy and power system while satisfying the constraints, and use the optimal output power of each device in the energy and power system as the actual output power of each device in the energy and power system on the next day, so that the cost output by the cost calculation model of the energy and power system is minimized;

[0008] The revenue cost of the energy power system is the sales of CO 2Revenue from converted natural gas.

[0009] Furthermore, the cost calculation model of the energy power system on the dth typical day is as follows:

[0010] E=f d (C)-f d (M);

[0011] Among them, f d (C) is the expenditure cost of the energy and power system on the dth typical day, f d (M) is the revenue cost of the energy power system on the dth typical day.

[0012] Furthermore, the expenditure cost of the energy and power system on the dth typical day is f d The calculation formula of (C) is as follows:

[0013]

[0014] in, represents the purchase cost of the energy power system in the tth period on the dth typical day; represents the operating cost of the energy generating station in the tth period on the dth typical day; represents the maintenance cost of the energy generating station in the tth period on the dth typical day; represents the fuel cost of the centralized pollution treatment station in the tth period on the dth typical day; represents the operating cost of the carbon capture and storage facility in the tth period on the dth typical day; It represents the operation and maintenance cost of the P2G equipment in the tth period of the dth typical day; T is the total number of periods of the dth typical day.

[0015] Furthermore, the revenue cost f of the energy power system on the dth typical day is d The calculation formula of (M) is as follows:

[0016]

[0017] in, is the CO generated by the energy power system in the tth period of the dth typical day 2 quality, is the untreated waste CO2 flowing into the P2G device during the tth period of the dth typical day 2 quality.

[0018] Furthermore, the operating cost of the CCS facility in the tth period on the dth typical day is The specific expressions are as follows:

[0019]

[0020] Among them, α CCS1 , α CCS2 , α CCS3 , α CCS4 , α CCS5 is the unit fuel cost of the thermal power generation unit, is the actual output of the carbon capture and storage equipment in the tth period on the dth typical day, Storing CO for carbon capture storage 2 The unit cost, is the CO2 of the carbon capture and storage equipment in the tth period on the dth typical day 2 Collection quality, is the CO of the P2G device in the tth period of the dth typical day 2 Consumption quality. The maximum output power of the carbon capture storage device Its actual output power at time t on the dth typical day is The difference.

[0021] Furthermore, the CO of the P2G device in the tth period of the dth typical day is 2 Consumption quality The calculation formula is as follows:

[0022]

[0023] Where η is the CO of the P2G device. 2 Conversion efficiency, is the CO transmitted to the P2G device in the tth period of the dth typical day 2 Quality, δ CCS CO output per unit power output of the carbon capture and storage device 2 quality.

[0024] Furthermore, the operation and maintenance cost of the P2G equipment in the tth period on the dth typical day is The calculation formula is as follows:

[0025]

[0026] Among them, α P2G is the energy consumption cost per unit power of the P2G device, is the power consumption of the P2G device in the tth period of the dth typical day, η P2G For the operating efficiency of P2G equipment, is the volume of natural gas produced by the P2G equipment in the tth period on the dth typical day, H T is the calorific value of natural gas.

[0027] Furthermore, the operating cost of the energy power station in the tth period of d typical days is The calculation formula is as follows:

[0028]

[0029] Among them, α run is the operating cost per unit power of the energy power system, is the output power of the wind turbine energy power station in the tth period on the dth typical day, is the output power of the photovoltaic power station in the tth period on the dth typical day, is the output power of the thermal power generation group in the tth period of the dth typical day.

[0030] Furthermore, the CO generated by the energy power system in the tth period of the dth typical day is 2 quality The calculation formula is as follows:

[0031]

[0032] Among them, δ sys CO generated per unit of power in the energy power system 2 quality.

[0033] Furthermore, the constraints include: power balance constraints of the energy and power system and boundary power constraints of each device in the energy and power system, wherein the power balance constraints of the energy and power system are specifically as follows:

[0034]

[0035] in, is the load power consumption of the energy power station in the tth period of the dth typical day.

[0036] The present invention mathematically models the expenditure cost and income cost of the energy power system according to the flow direction of energy, solves the model using an optimization algorithm, takes the expenditure cost of the energy power system as small as possible and the income cost as high as possible as the control target, and continuously iterates and solves under constraints until the optimal solution with the minimum expenditure cost and the highest input cost is solved, that is, the output of each device when the carbon flow processing cost is minimized, so as to reduce the CO2 emissions of the new energy power system. 2 Emissions, increasing CO 2 The mobility between clean energy and new energy will promote the low-carbon economic transformation of new energy systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1A schematic diagram of the structure of an energy and power system provided by an embodiment of the present invention;

[0038] Figure 2 A flow chart of an energy and power system control method based on carbon emission reduction provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0039] The specific implementation modes of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0040] Figure 1 The schematic diagram of the structure of the energy and power system provided in the embodiment of the present invention only shows the parts related to the embodiment of the present invention for the convenience of explanation. The energy and power system includes:

[0041] The energy power station, pollution centralized treatment station, carbon capture storage equipment, and P2G equipment are connected in sequence. The energy power station includes new energy power stations and thermal power generation groups. The new energy power station includes: wind energy power stations and photovoltaic power stations. The electricity generated by the energy power station is normally supplied to the load or connected to the grid. The gas generated (including CO 2 ) and waste are transported to the centralized pollution treatment station, where the waste is incinerated. The incineration process produces gases (including CO 2 ) is transported together with the gas generated by the new energy power station to the carbon capture storage device (CCS), which collects CO 2 The P2G device uses electricity to transfer water (H 2 O) into hydrogen (H 2 ), H 2 With CO 2 Combined to produce natural gas (CH 4 ), transported to the natural gas market, and realize positive revenue from carbon treatment. The goal is to reduce CO2 in the energy and power system. 2 Emissions, increasing CO 2 and clean energy to promote the low-carbon economic transformation of the energy and power system.

[0042] Figure 2 A flow chart of an energy power system control method based on carbon emission reduction provided in an embodiment of the present invention, the method specifically comprises the following steps:

[0043] (1) Construct a cost calculation model for the energy and power system based on the expenditure cost and revenue cost of the energy and power system;

[0044] (2) Collect the operating parameters of the energy and power system on the previous day, input them into the cost calculation model, find the optimal output power of each device in the energy and power system while satisfying the constraints, and use the optimal output power of each device in the energy and power system as the actual output power of each device in the energy and power system on the next day, so that the cost output by the cost calculation model of the energy and power system is minimized;

[0045] The revenue cost of the energy power system is the revenue generated by selling CO 2 Revenue from converted natural gas.

[0046] In the embodiment of the present invention, the cost calculation model of the energy power system consists of two parts: the expenditure cost and the income cost of the energy power system. The mathematical model f of the expenditure cost of the energy power system on the dth typical day is d (C), its expression is as follows:

[0047]

[0048] Where T is the total number of time periods on the dth typical day; represents the purchase cost of the energy power system in the tth period on the dth typical day;

[0049] represents the operating cost of the energy generating station in the tth period on the dth typical day;

[0050] represents the maintenance cost of the energy generating station in the tth period on the dth typical day;

[0051] represents the fuel cost of the centralized pollution treatment station in the tth period on the dth typical day;

[0052] represents the operating cost of the carbon capture and storage facility in the tth period on the dth typical day; It represents the operation and maintenance cost of the P2G equipment in the tth period of the dth typical day.

[0053] CO 2 After being processed by P2G equipment, natural gas CH 4 The positive revenue realized by transporting to the natural gas market is taken as the revenue of the new energy power system, and the revenue cost mathematical model f of the energy power system on the dth typical day is established. d (M), its expression is as follows:

[0054]

[0055] in, is the CO generated by the energy power system in the tth period of the dth typical day 2 The mass is the CO2 collected by the carbon capture and storage device in the tth period on the dth typical day. 2 quality, is the untreated waste CO2 flowing into the P2G device during the tth period of the dth typical day 2 quality;

[0056] From equations (1) and (2), it can be seen that the smaller the expenditure cost of the energy and power system and the higher the income cost, the necessary conditions for maximizing the benefits of the energy and power system are established. The objective function of minimizing the cost of the energy and power system is established as follows:

[0057] E=min(f d (C)-f d (M)) (3)

[0058] ① The purchase cost of the energy power system in the tth period on the dth typical day The specific expressions are as follows:

[0059]

[0060] Among them, α buy is the cost per unit power of the energy power system, is the power purchased by the energy power system in the tth period on the dth typical day.

[0061] ② The operating cost of the energy power station in the tth period on the dth typical day The specific expressions are as follows:

[0062]

[0063] Among them, α run is the operating cost per unit power of the energy power system, is the output power of the wind turbine energy power station in the tth period on the dth typical day, is the output power of the photovoltaic power station in the tth period on the dth typical day, is the output power of the thermal power generation group in the tth period of the dth typical day.

[0064] ③ The maintenance cost of the energy power station in the tth period on the dth typical day The specific expressions are as follows:

[0065]

[0066] Among them, α run It is the maintenance cost per unit power of the energy power system.

[0067] ④ The fuel cost of the centralized pollution treatment station in the tth period on the dth typical day The specific expressions are as follows:

[0068]

[0069] Among them, α fuel is the fuel cost per unit active power of the centralized pollution treatment station, is the active power consumed by the centralized pollution treatment station in the tth period of the dth typical day.

[0070] ⑤ Operating cost of the carbon capture and storage equipment in the tth period on the dth typical day The specific expressions are as follows:

[0071]

[0072] Among them, α CCS1 , α CCS2 , α CCS3 , α CCS4 , α CCS5 is the unit fuel cost of the thermal power generation unit, is the actual output of the carbon capture and storage equipment in the tth period on the dth typical day, Storing CO for carbon capture storage 2 The unit cost, is the CO2 of the carbon capture and storage equipment in the tth period on the dth typical day 2 Collection quality, is the CO of the P2G device in the tth period of the dth typical day 2 Consumption quality. The maximum output power of the carbon capture storage device Its actual output power at time t on the dth typical day is The difference is expressed as:

[0073]

[0074] The CO of the carbon capture and storage device in the tth period of the dth typical day is 2 Collection quality The actual output power of the carbon capture and storage device in the tth period of the dth typical day can be The calculation formula is as follows:

[0075]

[0076] in, CO2 collected per unit power of carbon capture and storage equipment 2 quality.

[0077] CO of P2G equipment in the tth period of the dth typical day 2 Consumption quality The P2G device can be used to monitor the CO 2 The consumption is calculated as:

[0078]

[0079] Where η is the CO of the P2G device. 2 Conversion efficiency, is the CO transmitted to the P2G device in the tth period of the dth typical day 2 The quality is expressed as:

[0080]

[0081] Among them, δ CCS CO output per unit power output of the carbon capture and storage device 2 quality.

[0082] ⑥ Operation and maintenance cost of P2G equipment in the tth period on the dth typical day The specific expressions are as follows:

[0083]

[0084] Among them, α P2G is the energy consumption cost per unit power of the P2G device, is the power consumption of the P2G device in the tth period of the dth typical day, that is, the operating power consumption of the P2G device when generating natural gas. The calculation formula is as follows:

[0085]

[0086] Among them, η P2G For the operating efficiency of P2G equipment, is the volume of natural gas produced by the P2G equipment in the tth period on the dth typical day, H T It can be seen from formula (13) that the volume of natural gas produced by the P2G equipment in the tth period of the dth typical day is proportional to the energy consumption of the P2G equipment in the corresponding period, and is proportional to the CO2 waste of the P2G equipment. 2 Inversely proportional to quality.

[0087] ⑦ The CO generated by the energy power system in the tth period of the dth typical day 2 quality The specific expressions are as follows:

[0088]

[0089] Among them, δ sys CO generated per unit of power in the energy power system 2 quality.

[0090] Establish the power balance constraints of the energy and power system as follows:

[0091]

[0092] in, is the load power consumption of the energy power station in the tth period of the dth typical day.

[0093] Establish boundary power constraints for each device in the energy and power system, as follows:

[0094]

[0095] in, They are the minimum and maximum permissible operating powers of the centralized pollution treatment station respectively; are the minimum and maximum permissible operating powers of the carbon capture and storage equipment, respectively; They are the minimum and maximum allowed operating power of the P2G device respectively.

[0096] The present invention mathematically models the expenditure cost and income cost of the energy power system according to the flow direction of energy, solves the model using an optimization algorithm, takes the expenditure cost of the energy power system as small as possible and the income cost as high as possible as the control target, and continuously iterates and solves under constraints until the optimal solution with the minimum expenditure cost and the highest input cost is solved, that is, the output of each device when the carbon flow processing cost is minimized, so as to reduce the CO2 emissions of the new energy power system. 2 Emissions, increasing CO 2 The mobility between clean energy and new energy will promote the low-carbon economic transformation of new energy systems.

[0097] The present invention has been described exemplarily. Obviously, the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A control method for an energy power system based on carbon emission reduction, characterized in that: The energy power system includes: an energy power station, a centralized pollution treatment station, a carbon capture and storage device, and a P2G device connected in sequence, wherein the P2G device converts part of the CO2 collected by the carbon capture and storage device into natural gas. The control method of the energy power system is as follows: (1) Construct a cost calculation model for the energy and power system based on the expenditure cost and revenue cost of the energy and power system; (2) Collecting the operating parameters of the energy and power system on the previous day, inputting them into the cost calculation model, finding the optimal output power of each device in the energy and power system while satisfying the constraints, and controlling the energy and power system based on the optimal output power of each device, so that the cost output by the cost calculation model of the energy and power system is minimized; The revenue cost of the energy power system is the revenue obtained from selling natural gas converted from CO2.

2. The control method of the energy power system based on carbon emission reduction as claimed in claim 1, characterized in that: The cost calculation model of the energy and power system on the dth typical day is as follows: E=f d (C)-f d (M); Among them, f d (C) is the expenditure cost of the energy and power system on the dth typical day, f d (M) is the revenue cost of the energy power system on the dth typical day.

3. The control method of the energy power system based on carbon emission reduction as claimed in claim 2, characterized in that: The expenditure cost of the energy and power system on the dth typical day is f d The calculation formula of (C) is as follows: in, represents the purchase cost of the energy power system in the tth period on the dth typical day; represents the operating cost of the energy generating station in the tth period on the dth typical day; represents the maintenance cost of the energy generating station in the tth period on the dth typical day; represents the fuel cost of the centralized pollution treatment station in the tth period on the dth typical day; represents the operating cost of the carbon capture and storage facility in the tth period on the dth typical day; It represents the operation and maintenance cost of the P2G equipment in the tth period of the dth typical day; T is the total number of periods of the dth typical day.

4. The control method of the energy power system based on carbon emission reduction as claimed in claim 2, characterized in that: The revenue cost of the energy power system on the dth typical day is f d The calculation formula of (M) is as follows: in, is the mass of CO2 produced by the energy and power system in the tth period on the dth typical day, It is the mass of untreated waste CO2 flowing into the P2G device in the tth period of the dth typical day.

5. The control method of the energy power system based on carbon emission reduction as claimed in claim 3, characterized in that: The operating cost of the carbon capture and storage facility in the tth period on the dth typical day The specific expressions are as follows: Among them, α CCS1 , α CCS2 , α CCS3 , α CCS4 , α CCS5 is the unit fuel cost of the thermal power generation unit, is the actual output of the carbon capture and storage equipment in the tth period on the dth typical day, The unit cost of storing CO2 for a carbon capture storage device, is the CO2 collection mass of the carbon capture and storage equipment in the tth period on the dth typical day, is the CO2 consumption mass of the P2G equipment in the tth period on the dth typical day, The maximum output power of the carbon capture storage device Its actual output power at time t on the dth typical day is The difference.

6. The control method of the energy power system based on carbon emission reduction as claimed in claim 3, characterized in that: CO2 consumption mass of P2G equipment in the tth period on the dth typical day The calculation formula is as follows: Where η is the CO2 conversion efficiency of the P2G equipment, is the CO2 mass transmitted to the P2G device in the tth period of the dth typical day, δ CCS The mass of CO2 output per unit power output of a carbon capture and storage device.

7. The control method of the energy power system based on carbon emission reduction as claimed in claim 3, characterized in that: Operation and maintenance cost of P2G equipment in the tth period on the dth typical day The calculation formula is as follows Among them, α P2G is the energy consumption cost per unit power of the P2G device, is the power consumption of the P2G device in the tth period of the dth typical day, η P2G For the operating efficiency of P2G equipment, is the volume of natural gas produced by the P2G equipment in the tth period on the dth typical day, H T is the calorific value of natural gas.

8. The control method of the energy power system based on carbon emission reduction as claimed in claim 3, characterized in that: The operating cost of an energy generating station in the tth period of d typical days The calculation formula is as follows: Among them, α run is the operating cost per unit power of the energy power system, is the output power of the wind turbine energy power station in the tth period on the dth typical day, is the output power of the photovoltaic power station in the tth period on the dth typical day, is the output power of the thermal power generation group in the tth period of the dth typical day.

9. The control method of the energy power system based on carbon emission reduction as claimed in claim 4, characterized in that: The mass of CO2 produced by the energy and power system in the tth period of the dth typical day The calculation formula is as follows: Among them, δ sys The mass of CO2 produced per unit power of the energy power system.

10. The control method of the energy power system based on carbon emission reduction according to claim 1, characterized in that: The constraints include: power balance constraints of the energy and power system and boundary power constraints of each device in the energy and power system. The power balance constraints of the energy and power system are as follows: in, is the load power consumption of the energy power station in the tth period of the dth typical day.

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