Integrated energy system quotation and quantity report optimization method, device, equipment and medium

Abstract

The invention relates to an integrated energy system quotation quantity optimization method, device and equipment and a medium, and the method comprises the steps: calculating the total income of an integrated energy system; calculating the total energy purchase cost according to the total income and the expected maximum income of the integrated energy system based on a given yield; determining time-sharing energy purchase and optimal energy purchase cost by adopting an integrated energy system economic dispatching optimization model; judging whether the total energy purchase cost is smaller than the optimal energy purchase cost or not; if yes, adjusting the total energy purchase cost by adopting an acceptable gas-electricity unit price table, and calculating an energy purchase marginal price by using the adjusted total energy purchase cost; and if not, directly using the total energy purchase cost to calculate the energy purchase marginal price. According to the method, the benefit maximization when the comprehensive energy system participates in the market can be ensured while solving of a complex optimization problem is avoided, and the optimal operation configuration of multiple types of energy is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of integrated energy systems, and in particular to an integrated energy system quotation and quantity optimization method, device, equipment and medium. Background Art

[0002] With the increasing severity of energy shortages, global warming, environmental pollution and other problems, improving energy efficiency and establishing a safe, economical and environmentally friendly new energy system have become important issues in the energy field. The integrated energy system complements electricity, gas, heat and cold energy, gives full play to the potential of coordinated linkage of various heterogeneous energies, performs cascade utilization of energy and improves the utilization rate of primary energy. In the process of the integrated energy system participating in the market operation, it is necessary to adopt certain strategies for quotation and quantity reporting to ensure the maximization of the benefits of the integrated energy system itself and achieve the optimal operating configuration of multiple types of energy. Existing technologies usually require calling commercial solvers to solve complex optimization problems, and the optimization problems in these methods are difficult to solve and may lead to copyright issues and network security issues. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a method, device, equipment and medium for optimizing the quotation and quantity reporting of an integrated energy system, which can avoid solving complex optimization problems while ensuring the maximization of the benefits of the integrated energy system when participating in the market and achieve the optimal operating configuration of multiple types of energy.

[0004] The technical solution adopted by the present invention to solve the technical problem is: to provide a method for optimizing the quotation and quantity of an integrated energy system, comprising the following steps:

[0005] Calculate the total benefits of the integrated energy system based on the user's electricity, heating and cooling needs and adjustable loads;

[0006] Based on a given rate of return, the total energy purchase cost is calculated according to the total revenue and the expected maximum revenue of the integrated energy system;

[0007] According to the user's demand for electricity, heating and cooling and the market unit price of energy purchase, the comprehensive energy system economic dispatch optimization model is used to determine the time-of-use energy purchase amount and the optimal energy purchase cost;

[0008] Determining whether the total energy purchase cost is less than the optimal energy purchase cost;

[0009] If the total energy purchase cost is less than the optimal energy purchase cost, the total energy purchase cost is adjusted using the acceptable gas and electricity unit price table, and the energy purchase marginal price is calculated using the adjusted total energy purchase cost, and the energy purchase marginal price is quoted as an acceptable price;

[0010] If the total energy purchase cost is not less than the optimal energy purchase cost, the marginal energy purchase price is directly calculated using the total energy purchase cost, and the marginal energy purchase price is quoted as an acceptable price.

[0011] The total benefit of the comprehensive energy system is calculated based on the user's electric heating and cooling demand and adjustable load, specifically including:

[0012] The energy supply benefits of the integrated energy system are obtained based on the user's electricity, heating and cooling needs and the corresponding retail prices;

[0013] Calculate the demand response benefits and spot market benefits brought by adjustable load;

[0014] The energy supply income, demand response income and spot market income are summed to obtain the total income of the integrated energy system.

[0015] The energy supply benefits are Calculated, where R RIES For energy benefit, is the electricity selling price, is the electric power sold during period t, For hot selling price, is the thermal power sold during period t, To sell at a cold price, is the cooling power sold during period t, T is the number of operating periods in a day, and Δt is the unit time.

[0016] The demand response benefits are The spot market income is calculated by Calculated, where R CL is the demand response benefit, δ e The electric load compensation coefficient can be reduced by is the load that can be reduced during period t, δ h The heat load compensation coefficient can be reduced by is the heat load that can be reduced during period t, R SL is the spot market return, ξ e is the unit transferable electric load incentive coefficient, is the transferable load in period t, ξ h is the unit transferable heat load excitation coefficient, is the heat load that can be transferred during period t, T is the number of operating periods in a day, and Δt is the unit time.

[0017] The total energy purchase cost is calculated by R B =R SUM -R MAX η is calculated, where R B is the total energy purchase cost, R SUMis the total benefit of the integrated energy system, R MAX is the expected maximum return, and η is the rate of return.

[0018] The economic dispatch optimization model of the integrated energy system aims to minimize the daily operating cost of the integrated energy system, and its objective function is expressed as: minF cost =F BE +F BG , where F cost is the daily operating cost of the integrated energy system, F BE is the electricity purchase cost of the comprehensive energy system, expressed as: in, is the market electricity purchase price during period t, is the electric power exchanged with the energy market during period t, F BG is the gas purchase cost of the comprehensive energy system, expressed as: is the market gas purchase price during period t, is the gas power exchanged with the energy market during period t, T is the number of operating periods in a day, and Δt is the unit time.

[0019] The constraints of the comprehensive energy system economic dispatch optimization model include: power balance constraints, upper and lower limit constraints of unit output, unit climbing constraints and flexible load constraints, among which the power balance constraints include: electric power balance constraints, thermal power balance constraints, gas power balance constraints and cold power balance constraints.

[0020] The acceptable gas and electricity price table is obtained by using a retrospective table building method, and the retrospective table building method is specifically as follows:

[0021] The total electricity purchase cost under different yields is calculated by back-testing method, and the acceptable gas / electricity unit price under different yields is determined based on the total electricity purchase cost obtained;

[0022] Establish a table of acceptable gas and electricity unit prices based on rate of return, acceptable gas / electricity unit prices, and total electricity purchase costs.

[0023] The marginal price of purchased energy is calculated in the following way:

[0024] According to the user's demand for electricity, heating and cooling, the required power and gas power are determined through the conversion of the integrated energy system;

[0025] The marginal price of electricity purchase is determined by the ratio of the electricity purchase cost in the total energy purchase cost to the required power purchase;

[0026] The marginal price of gas purchase is determined by the ratio of the gas formation cost in the total energy purchase cost to the required gas purchase power.

[0027] The technical solution adopted by the present invention to solve the technical problem is: to provide a comprehensive energy system quotation and quantity optimization device, comprising:

[0028] The revenue calculation module is used to calculate the total revenue of the integrated energy system based on the user's electric heating and cooling demand and adjustable load;

[0029] A cost calculation module, for calculating the total energy purchase cost based on a given rate of return according to the total revenue and the expected maximum revenue of the integrated energy system;

[0030] A determination module is used to determine the time-of-use energy purchase amount and the optimal energy purchase cost based on the user's electric heating and cooling demand and the market energy purchase unit price using an integrated energy system economic dispatch optimization model;

[0031] A judgment module, used for judging whether the total energy purchase cost is less than the optimal energy purchase cost;

[0032] A first quotation module is used to adjust the total energy purchase cost by using an acceptable gas and electricity price table when the total energy purchase cost is less than the optimal energy purchase cost, and calculate the energy purchase marginal price by using the adjusted total energy purchase cost, and quote the energy purchase marginal price as an acceptable price;

[0033] The second quotation module is used to directly use the total energy purchase cost to calculate the energy purchase marginal price when the total energy purchase cost is not less than the optimal energy purchase cost, and quote the energy purchase marginal price as an acceptable price.

[0034] The revenue calculation module includes:

[0035] The first calculation unit is used to obtain the energy supply income of the integrated energy system according to the user's electric heating and cooling demand and the corresponding retail price;

[0036] The second calculation unit is used to calculate the demand response benefits and spot market benefits brought by the adjustable load;

[0037] The summing unit is used to sum the energy supply income, demand response income and spot market income to obtain the total income of the integrated energy system.

[0038] The first computing unit Calculate the energy supply benefits of the integrated energy system, where R RIES For energy benefit, is the electricity selling price, is the electric power sold during period t, For hot selling price, is the thermal power sold during period t, To sell at a cold price, is the cooling power sold during period t, T is the number of operating periods in a day, and Δt is the unit time.

[0039] The second computing unit is Calculate the demand response benefits by Calculate the spot market return, where R CL is the demand response benefit, δ e The electric load compensation coefficient can be reduced by is the load that can be reduced during period t, δ h The heat load compensation coefficient can be reduced by is the heat load that can be reduced during period t, R SL is the spot market return, ξ e is the unit transferable electric load incentive coefficient, is the transferable load in period t, ξ h is the unit transferable heat load excitation coefficient, is the heat load that can be transferred during period t, T is the number of operating periods in a day, and Δt is the unit time.

[0040] The cost calculation module is implemented by R B =R SUM -R MAX ηCalculate the total energy purchase cost, where R B is the total energy purchase cost, R SUM is the total benefit of the integrated energy system, R MAX is the expected maximum return, and η is the rate of return.

[0041] The economic dispatch optimization model of the integrated energy system aims to minimize the daily operating cost of the integrated energy system, and its objective function is expressed as: minF cost =F BE +F BG , where F cost is the daily operating cost of the integrated energy system, F BE is the electricity purchase cost of the comprehensive energy system, expressed as: Among them, λ t BE is the market electricity purchase price during period t, P B t E is the electric power exchanged with the energy market during period t, F BG is the gas purchase cost of the comprehensive energy system, expressed as: is the market gas purchase price during period t, is the gas power exchanged with the energy market during period t, T is the number of operating periods in a day, and Δt is the unit time.

[0042] The constraints of the comprehensive energy system economic dispatch optimization model include: power balance constraints, upper and lower limit constraints of unit output, unit climbing constraints and flexible load constraints, among which the power balance constraints include: electric power balance constraints, thermal power balance constraints, gas power balance constraints and cold power balance constraints.

[0043] The acceptable gas and electricity price table is obtained by using a retrospective table building method, and the retrospective table building method is specifically as follows:

[0044] The total electricity purchase cost under different yields is calculated by back-testing method, and the acceptable gas / electricity unit price under different yields is determined based on the total electricity purchase cost obtained;

[0045] Establish a table of acceptable gas and electricity unit prices based on rate of return, acceptable gas / electricity unit prices, and total electricity purchase costs.

[0046] The first quotation module and the second quotation module both include:

[0047] A determination unit, used to determine the required purchased electricity power and gas power through conversion of the integrated energy system according to the electric heating and cooling demand of the user side;

[0048] The electricity quotation unit is used to determine the marginal price of electricity purchase by the ratio of the electricity purchase cost in the total energy purchase cost to the required electricity purchase power;

[0049] The gas quotation unit is used to determine the marginal price of gas purchase by the ratio of the gas cost in the total energy purchase cost to the required gas purchase power.

[0050] The technical solution adopted by the present invention to solve its technical problem is: to provide an electronic device, including a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the above-mentioned comprehensive energy system quotation and quantity optimization method when executing the computer program.

[0051] The technical solution adopted by the present invention to solve its technical problem is: providing a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above-mentioned comprehensive energy system quotation and quantity optimization method are implemented.

[0052] Beneficial Effects

[0053] Due to the adoption of the above technical scheme, the present invention has the following advantages and positive effects compared with the prior art: the present invention first determines the total revenue of the integrated energy system and calculates the total electricity and gas purchase costs under a given rate of return, then solves the electricity and gas purchase volumes of the integrated energy system according to the operation constraints and power balance constraints of various equipment in the integrated energy system, calculates the actual electricity and gas purchase volumes according to the energy conversion efficiency of the integrated energy system, and then determines the gas-electricity unit price by the ratio of the total electricity and gas purchase costs to the actual electricity and gas purchase volumes, and uses the calculated electricity and gas unit prices as acceptable energy purchase prices for the integrated energy system. This method ensures that the benefits of the integrated energy system when participating in the market are maximized, gives play to the potential for linkage and coordination of multiple heterogeneous energies, and achieves the optimal operating configuration of multiple types of energy. In the solution process, the backtracking method is used to calculate the quotation and quantity strategy, which simplifies the solution of complex optimization problems and avoids calling commercial solvers, thereby avoiding copyright issues and network security issues. It has greater convenience and a wider range of applications in actual engineering applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a schematic diagram of the structure of the integrated energy system;

[0055] Figure 2 It is a flow chart of a method for optimizing the quotation and quantity of an integrated energy system according to a first embodiment of the present invention;

[0056] Figure 3 is a user side load demand curve diagram in an embodiment of the present invention;

[0057] Figure 4 is a power curve diagram of the interaction between the integrated energy system and the energy market in an embodiment of the present invention;

[0058] Figure 5 It is the flexible electrical and thermal load distribution diagram on the user side;

[0059] Figure 6 It is a schematic diagram of the relationship between the rate of return, the electricity price ratio and the acceptable gas price;

[0060] Figure 7 It is a schematic diagram of demand response and spot market revenue in various scenarios;

[0061] Figure 8 It is a schematic diagram of electric load balance under full dispatchability;

[0062] Fig. 9 It is a schematic diagram of heat load balance under full dispatchability;

[0063] Fig.10 This is a schematic diagram of the output of each energy source in scenario 1;

[0064] Fig.11 This is a schematic diagram of the output of each energy source in scenario 2;

[0065] Fig.12 This is a schematic diagram of the energy output of scenario 3. DETAILED DESCRIPTION

[0066] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0067] The first embodiment of the present invention relates to a method for optimizing the quotation and quantity of an integrated energy system. Figure 1 As shown in the figure, it is a complex system that includes multiple energy coupling conversions such as electricity, gas, heat and cold. In the system structure diagram, the system is composed of a cogeneration unit (mainly including a gas turbine and a waste heat recovery device), a gas boiler, an electric boiler and a refrigeration unit. The cogeneration unit can generate electricity and heat at the same time. The gas boiler and the electric boiler use natural gas and electricity for heating respectively, and the refrigeration unit is used for cooling. At the same time, the integrated energy system also participates in demand response and the spot market, and adjusts the electricity and heat reducible loads and transferable loads in a timely manner, effectively increasing the operational flexibility of the integrated energy system. In addition, on the premise of meeting the internal load, the integrated energy system sells or purchases the surplus or missing energy to the energy market.

[0068] The system model of the integrated energy system in this embodiment includes three parts, namely, the power model of each component, the adjustable load model and the energy purchase cost model. Among them, the power model of each component includes four models, namely, the cogeneration model, the gas boiler model, the electric boiler model and the refrigeration unit model.

[0069] Among them, cogeneration is a comprehensive energy utilization technology. Its basic principle is to use the waste heat generated by the gas turbine during the power generation process, convert the waste heat into useful thermal energy through the waste heat recovery device, and generate electricity at the same time. In the cogeneration model, the gas turbine and the waste heat recovery device are mainly considered.

[0070] The gas turbine can be represented as:

[0071]

[0072] Where: is the power generation of the gas turbine during period t; is the natural gas consumption of the gas turbine during period t; η GT is the power generation efficiency of the gas turbine; ξ is the calorific value of natural gas (taken as 9.7Kwh / (N·m 3)); Δt is the unit time.

[0073] The waste heat recovery device can be expressed as:

[0074]

[0075] Where: is the waste heat power generated by the gas turbine during power generation during period t; η RH is the heating efficiency of the gas turbine.

[0076]

[0077]

[0078] Where: is the thermal power converted by the waste heat recovery device during period t; UH is the heating efficiency of the waste heat recovery device; is the electric power converted by the waste heat recovery device during period t; η UE is the power generation efficiency of the waste heat recovery device.

[0079] The gas boiler model can be expressed as:

[0080]

[0081] Where: is the thermal power of the gas boiler during period t; is the natural gas consumption of the gas boiler during period t; η GB It is the heating efficiency of gas boiler.

[0082] The electric boiler model can be expressed as:

[0083]

[0084] Where: is the thermal power of the electric boiler during period t; is the electric power consumed by the electric boiler during period t; η EB is the heating efficiency of the electric boiler.

[0085] A refrigeration unit is a device that converts electrical energy into cold energy. The refrigerant absorbs heat in the object being cooled and releases heat in the ambient medium, thereby achieving heat transfer, cooling the required object and achieving a cooling effect. Electric refrigeration equipment can reasonably utilize energy quality differences and has a high energy conversion efficiency, which can be expressed as:

[0086]

[0087] Where: is the cooling power of the refrigeration unit during period t; The power consumption of the refrigeration unit during period t; η ER is the cooling efficiency of the refrigeration unit.

[0088] The adjustable load model includes two models, namely the electric load model and the thermal load model. Among them, the electric load model and the thermal load model can be divided into two types of loads: the load that can be reduced and the load that can be transferred.

[0089] The electric load model can be expressed as:

[0090]

[0091] Where: is the transferable electric load during period t; The electric load can be reduced during the t period; is the original electric load in period t; ρ and ε are the adjustable proportional coefficients of the transferable electric load and the curtailable electric load respectively; γ is the electric load response limit coefficient, and T is the number of operating periods in a day.

[0092] The heat load also has the characteristics of being reducible and transferable, so the heat load model can be expressed as:

[0093]

[0094] Where: is the transferable heat load during period t; The heat load can be reduced during period t; is the original heat load during period t; ρ′ and ε′ are the adjustable proportional coefficients of the transferable heat load and the reducible heat load respectively; γ′ is the heat load response limit coefficient.

[0095] The energy purchase cost model of the integrated energy system includes four parts: the energy supply benefit model of the integrated energy system, the flexible load benefit model, the total benefit model of the integrated energy system, and the total electricity and gas purchase cost model under a given rate of return.

[0096] Due to the current technical bottlenecks and operating costs, this implementation does not consider the sale of gas to the market, but only considers the sale of electricity, heat and cold to the market. Therefore, the energy supply revenue model of the integrated energy system can be expressed as:

[0097]

[0098] Where: is the electricity selling price, is the electric power sold during period t, For hot selling price, is the thermal power sold during period t, To sell at a cold price, is the cooling power sold during period t.

[0099] This implementation method divides flexible loads into curtailable loads and transferable loads, and only considers power loads and thermal loads in this model. Curtailable loads are loads that can withstand certain interruptions or power reductions, and reduce operating time. They can be partially or completely curtailed according to supply and demand conditions. The power consumption of transferable loads in each time period can be flexibly adjusted as long as the total load of the entire cycle after the transfer remains unchanged from that before the transfer. The flexible load benefit model can be expressed as:

[0100] R V =R CL +R SL

[0101] Where: R CL is the demand response benefit (compensation for load reduction); R SL It is the spot market revenue (transferable load incentive).

[0102] The load can be reduced to participate in the demand response market. The demand response revenue is provided by the demand response market to the integrated energy system. The demand response revenue model can be expressed as:

[0103]

[0104] Where: e The unit can reduce the electric load compensation coefficient; is the load that can be reduced during period t; h The heat load compensation coefficient can be reduced by one unit; The heat load can be reduced during the t period.

[0105] The transferable load participates in the spot market, regulates the load usage period, and obtains revenue by using the peak-valley price difference. Therefore, the spot market revenue model can be expressed as:

[0106]

[0107] Where: e is the unit transferable electric load incentive coefficient; is the transferable electric load during period t; h is the unit transferable heat load incentive factor; The heat load can be transferred during the period t.

[0108] The total revenue of the integrated energy system is equal to the sum of the market revenue, demand response revenue and spot market revenue of the integrated energy system. The total revenue model of the integrated energy system can be expressed as:

[0109] R SUM =R RIES +R V

[0110] When the rate of return is known, the total electricity and gas purchase costs can be calculated based on the total revenue of the integrated energy system and the expected maximum total revenue of the integrated energy system. The total electricity and gas purchase cost model under a given rate of return can be expressed as:

[0111] R B =R SUM -R MAX η

[0112] Where: R B is the total electricity and gas purchase cost; R SUM is the total benefit of the integrated energy system; R MAX is the maximum expected net benefit of the integrated energy system; η is the rate of return.

[0113] like Figure 2 As shown, the comprehensive energy system quotation and quantity optimization method of this embodiment specifically includes the following steps:

[0114] Step 1: Calculate the total revenue of the integrated energy system based on the user's heating and cooling needs and adjustable load. This step specifically includes:

[0115] According to the user's electric heating and cooling demand and the corresponding retail price, the energy supply benefit model of the integrated energy system is used to calculate the energy supply benefit of the integrated energy system;

[0116] The demand response revenue model is used to calculate the demand response revenue brought by the adjustable load, the spot market revenue model is used to calculate the spot market revenue brought by the adjustable load, and the flexible load revenue model is used to sum the obtained demand response revenue and spot market revenue to obtain the flexible load revenue;

[0117] The total benefit model of the integrated energy system is adopted to sum the energy supply benefit and the flexible load benefit to obtain the total benefit of the integrated energy system.

[0118] Step 2: Based on a given rate of return, calculate the total energy purchase cost according to the total revenue and expected maximum revenue of the integrated energy system. In this step, the total electricity purchase and gas purchase cost model under a given rate of return can be used to calculate the total electricity purchase and gas purchase cost.

[0119] Step 3: Based on the user's demand for electricity, heating and cooling and the market unit price of energy purchased, the comprehensive energy system economic dispatch optimization model is used to determine the time-of-use energy purchase amount and the optimal energy purchase cost.

[0120] In this step, the economic dispatch optimization model of the integrated energy system includes objective functions and constraints.

[0121] The economic dispatch optimization model of the integrated energy system takes into account the flexible load on the user side to calculate the purchased energy. Its goal is to reasonably dispatch the output of each controllable device based on the electric heating and cooling demand curve on the user side, while meeting the user load demand and the constraints of each device, so as to minimize the daily operation cost of the integrated energy system, thereby solving the time-sharing purchased energy power and time-sharing device output for daily operation.

[0122] The daily operating cost of the integrated energy system includes the cost of purchasing electricity and gas for the integrated energy system, and its objective function can be expressed as:

[0123] f cost =F BE +F BG

[0124] Among them, F cost is the daily operating cost of the integrated energy system, F BE is the electricity purchase cost of the comprehensive energy system, expressed as: in, is the market electricity purchase price during period t, is the electric power exchanged with the energy market during period t, F BG is the gas purchase cost of the comprehensive energy system, expressed as: is the market gas purchase price during period t, is the gas power exchanged with the energy market during period t.

[0125] The constraints of the economic dispatch optimization model of the integrated energy system include: power balance constraints, upper and lower limit constraints of unit output, unit climbing constraints and flexible load constraints, among which the power balance constraints include: electric power balance constraints, thermal power balance constraints, gas power balance constraints and cold power balance constraints.

[0126] The electric power balance constraint is expressed as:

[0127]

[0128] Where: The left side of the equation They are respectively the electric load power in period t, the electric power sold by the integrated energy system, the transferable electric load power, the electric power consumed by the electric boiler, and the electric power consumed by the refrigeration unit; the right side of the equation They are respectively the power generation power of the gas turbine in period t, the power purchased by the integrated energy system, the power of the reducible electric load, and the power generation power of the waste heat recovery device.

[0129] The thermal power balance constraint is expressed as:

[0130]

[0131] Where: The left side of the equation are the heat load power and transferable heat load power in period t respectively; the right side of the equation They are the thermal power of the gas boiler during period t, the heat load power that can be reduced, the heating power of the waste heat recovery device, and the heating power of the electric boiler.

[0132] The gas power balance constraint is expressed as:

[0133]

[0134] Where: The left side of the equation are the natural gas consumption of the gas turbine and the natural gas consumption of the gas boiler during period t; the right side of the equation is the gas purchasing power of the comprehensive energy system during period t.

[0135] The cold power balance constraint is expressed as:

[0136]

[0137] Where: The left side of the equation is the cooling load power during period t; the right side of the equation is the cooling power of the electric refrigerator during period t; η ER is the cooling efficiency.

[0138] The upper and lower limits of the unit output are expressed as:

[0139]

[0140]

[0141]

[0142]

[0143]

[0144]

[0145] Where: are the upper and lower limits of gas turbine power generation respectively; They are the upper and lower limits of the heating power of the waste heat recovery device respectively; They are the upper and lower limits of the power generation capacity of the waste heat recovery device respectively; They are the upper and lower limits of the power generation of gas boilers respectively; They are the upper and lower limits of the heating power of the electric boiler respectively; They are the upper and lower limits of the refrigeration power of the refrigeration unit respectively.

[0146] The unit climbing constraint is expressed as:

[0147]

[0148]

[0149] Where: are the upward and downward climbing rates of the gas turbine, respectively; They are the upward and downward climbing rates of the gas boiler respectively.

[0150] Since the transferable load changes the user's electricity consumption period, and unlike the transferable load that does not change the user's electricity consumption, the curtailable load reduces the user's electricity consumption. Therefore, while pursuing the maximization of market benefits, the flexible load also needs to consider user satisfaction. Therefore, the proportion of transferable load and curtailable load in the total load is subject to certain constraints, which can be expressed as:

[0151]

[0152]

[0153]

[0154]

[0155] Where: are the proportions of transferable load and curtailable load to the total electrical load respectively; are the proportions of transferable load and curtailable load to the total heat load respectively.

[0156] Step 4, determine whether the total energy purchase cost is less than the optimal energy purchase cost. The optimal energy purchase cost can be obtained through the comprehensive energy system economic dispatch optimization model in step 3, and the total energy purchase cost under the current rate of return can be calculated according to step 2. If the current total energy purchase cost is sufficient to pay for the optimal energy purchase cost, that is, the total energy purchase cost is not less than the optimal energy purchase cost, then proceed to step 6; otherwise, the current total energy purchase cost is insufficient to pay for the optimal energy purchase cost, then proceed to step 5.

[0157] Step 5: Use the acceptable gas and electricity price table to adjust the total energy purchase cost, and use the adjusted total energy purchase cost to calculate the energy purchase marginal price, and quote the energy purchase marginal price as an acceptable price. The acceptable gas and electricity price table in this step can be constructed using the retrospective table construction method, which considers a variety of yields and electricity price ratios, and retrospectively calculates the energy purchase cost and acceptable electricity / gas price for each situation, and establishes a corresponding relationship table. You only need to look up the table to select the appropriate yield later. The specific process is as follows:

[0158] The total electricity purchase cost under different yields is calculated by the backtracking method, and the acceptable gas / electricity unit price under different yields is determined based on the total electricity purchase cost. When solving the acceptable gas / electricity price, it can be seen from the total electricity purchase and gas purchase cost model under a given yield that the total income of the integrated energy system and the maximum net income of the expected integrated energy system R MAX When the total electricity and gas purchase costs are known, they will change with the change of the rate of return η. At this time, since the power purchased by the integrated energy system in period t and the power purchased by the integrated energy system in period t are known quantities, when the ratio of electricity price to gas price is set to ε, the total electricity and gas purchase costs R B The expression can be expressed as:

[0159]

[0160] Combining the above formula with the total electricity and gas purchase cost model under a given rate of return, an acceptable gas price can be obtained, which is expressed as follows:

[0161]

[0162] The acceptable electricity price is ε times the acceptable gas price. Using the above formula to give different yields and electricity price ratios, the corresponding total energy purchase cost and acceptable electricity / gas price can be calculated.

[0163] Based on the rate of return, acceptable gas / electricity unit price and total electricity purchase cost, an acceptable gas / electricity unit price table is established, through which the rate of return can be found and adjusted. This table can be established at any time and can be used repeatedly, without having to be re-established every time a quotation is submitted, thus saving the calculation time of the quotation and improving the calculation efficiency.

[0164] In specific use, when the total energy purchase cost is less than the optimal energy purchase cost, the optimal energy purchase cost is used as the acceptable gas / electricity unit price, and the corresponding rate of return is obtained based on the acceptable gas / electricity unit price table, and then the adjusted total energy purchase cost is obtained according to the rate of return, thereby increasing the total energy purchase cost.

[0165] When using the adjusted total energy purchase cost to calculate the marginal price of energy purchase in this step, first determine the required electricity purchase power and gas purchase power through the conversion of the integrated energy system based on the user's electric heating and cooling demand; then, determine the marginal price of electricity purchase by the ratio of the electricity purchase cost in the total energy purchase cost to the required electricity purchase power, and then determine the marginal price of gas purchase by the ratio of the gas cost in the total energy purchase cost to the required gas purchase power.

[0166] Among them, the marginal price of electricity purchase is calculated as follows:

[0167]

[0168] The marginal price of purchasing gas is calculated as:

[0169]

[0170] Where: R BE , R BG are respectively the electricity purchase cost and gas purchase cost in the total energy purchase cost under the current rate of return, R BE,opt is the optimal electricity and gas purchase costs obtained by the economic dispatch model; BE , BG They are the marginal price of purchasing electricity and the marginal price of purchasing gas, respectively, and are the acceptable unit prices of electricity and gas used for reporting; pr represents the time-of-use electricity price range, including low, med, and high, representing low price, parity, and high price respectively; Tpr is the time period corresponding to the time-of-use electricity price.

[0171] Step 6: directly use the total energy purchase cost to calculate the energy purchase marginal price, and quote the energy purchase marginal price as an acceptable price. The method of calculating the energy purchase marginal price in this step is the same as that in step 5, and will not be repeated here.

[0172] To verify the effectiveness of the present invention, the present invention is further described below by means of an embodiment.

[0173] In this example, a community integrated energy system is selected as the research object. The total revenue R can be calculated based on the energy sales price, sales volume, demand load capacity, demand response compensation coefficient, and spot market revenue coefficient of the integrated energy system. SUM In order to solve the maximum net benefit of the expected integrated energy system, it is necessary to first determine the electricity, heating and cooling demand on the user side. The electricity, heating and cooling load demand curves for each period on the user side are as follows: Figure 3 shown.

[0174] According to the connection between the internal devices of the integrated energy system and the load demand of the given user side, the time-sharing power purchase volume and time-sharing gas purchase volume required by the integrated energy system can be obtained. The relevant parameters set in this embodiment are as follows: Figure 4 shown.

[0175] In the integrated energy system, since gas turbines and waste heat recovery devices can be used to generate electricity, in certain periods of time, the integrated energy system can not only meet the electricity demand of users without purchasing electricity from the energy market, but also sell the remaining electricity to the energy market. This part is Figure 3 The power purchased and sold in the market is a negative value, and the price of electricity sold to the load side is set to be the same as the price of electricity sold to the energy market.

[0176] The electricity price period of this embodiment is divided into: peak period is 10:00-13:00, 15:00-21:00; normal period is 8:00-9:00, 14:00, 22:00; valley period is 01:00-07:00, 23:00-24:00. The time-of-use electricity price is shown in Table 1.

[0177] Table 1 Grid time-of-use electricity price list (power purchase and sale from external energy market and upper grid)

[0178] Time Electricity purchase / (yuan / (kw·h)) Electricity sales / (yuan / (kw·h)) Peak hours 0.82 0.65 Normal period 0.53 0.42 Valley period 0.25 0.22

[0179] The prices of gas energy, heat energy and cold energy are given below, as shown in Table 2. The gas price refers to the price at which the integrated energy system purchases gas energy from the energy market, and the heat price and cold price refer to the retail price at which the user side purchases heat energy and cold energy from the integrated energy system.

[0180] Table 2 Price list of gas, heating and cooling energy

[0181] type Price / (Yuan / (kw·h)) Qi Energy 0.24 Thermal Energy 0.16 Cold Energy 0.68

[0182] The electric load on the user side includes the basic electric load, the curtailable electric load and the transferable electric load. The heat load on the user side includes the basic heat load, the curtailable heat load and the transferable electric heat load. Figure 5 .

[0183] The curtailable load participates in the demand response market, and the demand response revenue is provided by the demand response market to the integrated energy system. The transferable load participates in the spot market, regulates the load usage period, and obtains revenue by using the peak-valley price difference. Table 3 gives the flexible load parameters, which are the four coefficients in the demand response revenue model and the spot market revenue model, namely the unit curtailable electric load compensation coefficient, the unit curtailable thermal load compensation coefficient, the unit transferable electric load incentive coefficient, and the unit transferable thermal load incentive coefficient.

[0184] Table 3 Flexible load parameter table

[0185] type Price / (Yuan / (kw·h)) Reduce electrical load 0.2 Reduces heat load 0.1 Transferable electrical load 0.2 Transferable heat load 0.1

[0186] In the calculation, the cost includes the cost of purchasing electricity and gas for the integrated energy system, and the revenue includes the retail revenue of the integrated energy system selling electricity, heat and cold (where the revenue from electricity sales is the sales of electricity from IES to the energy market and the user side), demand response revenue and spot market revenue. Therefore, the maximum net revenue of the integrated energy system is expected to be the difference between the revenue and the cost. Table 4 gives the specific calculation parameters and results.

[0187] Table 4 Calculation parameters and results of expected maximum net income

[0188]

[0189] The following table uses the backtracking method to establish the total energy purchase cost and average electricity / gas price corresponding to different yields. Considering three scenarios with yields of 0.76, 0.81, and 0.86, it is found that the ratio of my country's average electricity price to average gas price is 1:2.27. Table 5 shows the total energy purchase cost and average electricity / gas price corresponding to different yields under a given gas-to-electricity price ratio.

[0190] Table 5 Total energy purchase cost and acceptable gas and electricity unit price under different yield rates

[0191]

[0192]

[0193] See the relationship between yield, electricity price ratio and acceptable gas price for Figure 6 ,The figure shows the sensitivity of the acceptable gas (electricity) price of the integrated energy system to the rate of return and electricity price ratio.

[0194] The following mainly considers the three scenarios in Table 5 and Figure 6 The extreme values ​​(four vertices) in the table are listed in Table 6. The corresponding rate of return and electricity price ratio of each scenario are listed, and the amount of electricity and gas purchased and the net income of the integrated energy system under each scenario are calculated. The demand response income and spot market income under each scenario are shown in Table 6. Figure 7 .

[0195] Table 6 Ratio of yield and electricity price for each scenario

[0196]

[0197] Market optimization results under dispatchable units

[0198] (1) Fully schedulable

[0199] Through Matlab optimization scheduling analysis, the output of each device in the integrated energy system can be obtained.

[0200] For the load output, see Figure 8 : During the period of 01:00-07:00, the electricity price is in the valley period, and the user-side electric load is also at a low level. Most of the electric load is supplied by the energy market. The insufficient electric energy is supplied by the gas turbine and the waste heat recovery device. During the period of 10:00-13:00 and 18:00-20:00, the electricity price is in the peak period. At this time, the user-side electric load is at a high level. Most of the electric load is supplied by the gas turbine and the waste heat recovery device, and the insufficient electric energy is supplemented by the energy market.

[0201] For heat load output, see Fig. 9:Due to the low price of natural gas, most of the heat load on the user side is provided by gas boilers, supplemented by waste heat recovery devices and electric boilers. At the same time, since the cogeneration unit uses the waste heat generated by the gas turbine during the power generation process, the waste heat is converted into useful thermal energy through the waste heat recovery device, and electricity is generated at the same time, so in the time periods of 1:00, 5:00, 8:00-13:00, 18:00-20:00, the output of the waste heat recovery device is simultaneously present in both the electric load and the thermal load.

[0202] (2) Scheduling restrictions

[0203] In order to verify the impact of reducing user-side load on the operation of internal equipment in the integrated energy system, three scenarios are set for comparison:

[0204] Scenario 1: User-side load is reduced to 60%;

[0205] Scenario 2: User-side load is reduced to 80%;

[0206] Scenario 3: User-side load is reduced to 90%.

[0207] The operation of the internal equipment of the integrated energy system in scenarios 1, 2, and 3 is shown in Fig.10 , Fig.11 and Fig.12 Comparing the output of each energy source in scenarios 1, 2, and 3 with that in the fully dispatchable case, it can be seen that the power interaction with the power grid in power dispatching has a negative value. Obviously, after reducing the load on the user side, the equipment can sell excess electricity to the power grid while meeting the load demand on the user side.

[0208] The second embodiment of the present invention relates to a comprehensive energy system quotation and quantity optimization device, comprising:

[0209] The revenue calculation module is used to calculate the total revenue of the integrated energy system based on the user's electric heating and cooling demand and adjustable load;

[0210] A cost calculation module, for calculating the total energy purchase cost based on a given rate of return according to the total revenue and the expected maximum revenue of the integrated energy system;

[0211] A determination module is used to determine the time-of-use energy purchase amount and the optimal energy purchase cost based on the user's electric heating and cooling demand and the market energy purchase unit price using an integrated energy system economic dispatch optimization model;

[0212] A judgment module, used for judging whether the total energy purchase cost is less than the optimal energy purchase cost;

[0213] A first quotation module is used to adjust the total energy purchase cost by using an acceptable gas and electricity price table when the total energy purchase cost is less than the optimal energy purchase cost, and calculate the energy purchase marginal price by using the adjusted total energy purchase cost, and quote the energy purchase marginal price as an acceptable price;

[0214] The second quotation module is used to directly use the total energy purchase cost to calculate the energy purchase marginal price when the total energy purchase cost is not less than the optimal energy purchase cost, and quote the energy purchase marginal price as an acceptable price.

[0215] The revenue calculation module includes:

[0216] The first calculation unit is used to obtain the energy supply income of the integrated energy system according to the user's electric heating and cooling demand and the corresponding retail price;

[0217] The second calculation unit is used to calculate the demand response benefits and spot market benefits brought by the adjustable load;

[0218] The summing unit is used to sum the energy supply income, demand response income and spot market income to obtain the total income of the integrated energy system.

[0219] The first computing unit Calculate the energy supply benefits of the integrated energy system, where R RIES For energy benefit, is the electricity selling price, is the electric power sold during period t, For hot selling price, is the thermal power sold during period t, To sell at a cold price, is the cooling power sold during period t, T is the number of operating periods in a day, and Δt is the unit time.

[0220] The second computing unit is Calculate the demand response benefits by Calculate the spot market return, where R CL is the demand response benefit, δ e The electric load compensation coefficient can be reduced by is the load that can be reduced during period t, δ h The heat load compensation coefficient can be reduced by is the heat load that can be reduced during period t, R SL is the spot market return, ξ e is the unit transferable electric load incentive coefficient, is the transferable load in period t, ξ h is the unit transferable heat load excitation coefficient, is the heat load that can be transferred during period t, T is the number of operating periods in a day, and Δt is the unit time.

[0221] The cost calculation module is implemented by R B =R SUM -R MAX ηCalculate the total energy purchase cost, where R B is the total energy purchase cost, R SUM is the total benefit of the integrated energy system, R MAX is the expected maximum return, and η is the rate of return.

[0222] The economic dispatch optimization model of the integrated energy system aims to minimize the daily operating cost of the integrated energy system, and its objective function is expressed as: minF cost =F BE +F BG , where F cost is the daily operating cost of the integrated energy system, F BE is the electricity purchase cost of the comprehensive energy system, expressed as: in, is the market electricity purchase price during period t, is the electric power exchanged with the energy market during period t, F BG is the gas purchase cost of the comprehensive energy system, expressed as: is the market gas purchase price during period t, is the gas power exchanged with the energy market during period t, T is the number of operating periods in a day, and Δt is the unit time.

[0223] The constraints of the comprehensive energy system economic dispatch optimization model include: power balance constraints, upper and lower limit constraints of unit output, unit climbing constraints and flexible load constraints, among which the power balance constraints include: electric power balance constraints, thermal power balance constraints, gas power balance constraints and cold power balance constraints.

[0224] The acceptable gas and electricity price table is obtained by using a retrospective table building method, and the retrospective table building method is specifically as follows:

[0225] The total electricity purchase cost under different yields is calculated by back-testing method, and the acceptable gas / electricity unit price under different yields is determined based on the total electricity purchase cost obtained;

[0226] Establish a table of acceptable gas and electricity unit prices based on rate of return, acceptable gas / electricity unit prices, and total electricity purchase costs.

[0227] The first quotation module and the second quotation module both include:

[0228] A determination unit, used to determine the required purchased electricity power and gas power through conversion of the integrated energy system according to the electric heating and cooling demand of the user side;

[0229] The electricity quotation unit is used to determine the marginal price of electricity purchase by the ratio of the electricity purchase cost in the total energy purchase cost to the required electricity purchase power;

[0230] The gas quotation unit is used to determine the marginal price of gas purchase by the ratio of the gas cost in the total energy purchase cost to the required gas purchase power.

[0231] It is not difficult to find that the present invention first determines the total revenue of the integrated energy system, and calculates the total electricity and gas purchase costs under a given rate of return, and then solves the electricity and gas purchase volume of the integrated energy system according to the operation constraints and power balance constraints of various equipment in the integrated energy system, and calculates the actual electricity and gas purchase volume according to the energy conversion efficiency of the integrated energy system, and then determines the gas-electricity unit price by the ratio of the total electricity and gas purchase costs to the actual electricity and gas purchase volume, and uses the calculated electricity and gas unit prices as acceptable energy purchase prices for the integrated energy system. This method ensures that the benefits of the integrated energy system when participating in the market are maximized, gives play to the potential for linkage and coordination of multiple heterogeneous energies, and achieves the optimal operating configuration of multiple types of energy. In the solution process, the backtracking method is used to calculate the quotation and quantity strategy, which simplifies the solution of complex optimization problems and avoids calling commercial solvers, thereby avoiding copyright issues and network security issues. It has greater convenience and a wider range of applications in actual engineering applications.

[0232] The third embodiment of the present invention relates to an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the integrated energy system quotation and quantity optimization method of the first embodiment when executing the computer program.

[0233] The fourth embodiment of the present invention relates to a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the integrated energy system quotation and quantity optimization method of the first embodiment.

[0234] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) that contain computer-usable program code.

[0235] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0236] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction method, which is implemented in the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0237] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0238] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for optimizing quotation and quantity of integrated energy system, characterized in that: The following steps are involved: Calculate the total benefits of the integrated energy system based on the user's electricity, heating and cooling needs and adjustable loads; Based on a given rate of return, the total energy purchase cost is calculated according to the total revenue and expected maximum revenue of the integrated energy system; based on the electric heating and cooling demand on the user side and the market energy purchase unit price, the integrated energy system economic dispatch optimization model is used to determine the time-of-use energy purchase amount and the optimal energy purchase cost; Determining whether the total energy purchase cost is less than the optimal energy purchase cost; If the total energy purchase cost is less than the optimal energy purchase cost, the total energy purchase cost is adjusted using the acceptable gas and electricity unit price table, and the energy purchase marginal price is calculated using the adjusted total energy purchase cost, and the energy purchase marginal price is quoted as an acceptable price; If the total energy purchase cost is not less than the optimal energy purchase cost, the marginal energy purchase price is directly calculated using the total energy purchase cost, and the marginal energy purchase price is quoted as an acceptable price.

2. The method for optimizing the quotation and quantity of the integrated energy system according to claim 1, characterized in that: The total benefit of the comprehensive energy system is calculated based on the user's electric heating and cooling demand and adjustable load, specifically including: The energy supply benefits of the integrated energy system are obtained based on the user's electricity, heating and cooling needs and the corresponding retail prices; Calculate the demand response benefits and spot market benefits brought by adjustable load; The energy supply income, demand response income and spot market income are summed to obtain the total income of the integrated energy system.

3. The method for optimizing the quotation and quantity of the integrated energy system according to claim 2, characterized in that: The energy supply benefits are Calculated, where R RIES For energy benefit, is the electricity selling price, is the electric power sold during period t, For hot selling price, is the thermal power sold during period t, To sell at a cold price, is the cooling power sold during period t, T is the number of operating periods in a day, and Δt is the unit time.

4. The method for optimizing the quotation and quantity of the integrated energy system according to claim 2, characterized in that: The demand response benefits are The spot market income is calculated by Calculated, where R CL is the demand response benefit, δ e The electric load compensation coefficient can be reduced by is the load that can be reduced during period t, δ h The heat load compensation coefficient can be reduced by is the heat load that can be reduced during period t, R SL is the spot market return, ξ e is the unit transferable electric load incentive coefficient, is the transferable load in period t, ξ h is the unit transferable heat load excitation coefficient, is the heat load that can be transferred during period t, T is the number of operating periods in a day, and Δt is the unit time.

5. The method for optimizing the quotation and quantity of the integrated energy system according to claim 1, characterized in that: The total energy purchase cost is calculated by R B =R SUM -R MAX η is calculated, where R B is the total energy purchase cost, R SUM is the total benefit of the integrated energy system, R MAX is the expected maximum return, and η is the rate of return.

6. The method for optimizing the quotation and quantity of the integrated energy system according to claim 1, characterized in that: The economic dispatch optimization model of the integrated energy system aims to minimize the daily operating cost of the integrated energy system, and its objective function is expressed as: minF cost =F BE +F BG , where F cost is the daily operating cost of the integrated energy system, F BE is the electricity purchase cost of the comprehensive energy system, expressed as: in, is the market electricity purchase price during period t, is the electric power exchanged with the energy market during period t, F BG is the gas purchase cost of the comprehensive energy system, expressed as: is the market gas purchase price during period t, is the gas power exchanged with the energy market during period t, T is the number of operating periods in a day, and Δt is the unit time.

7. The method for optimizing the quotation and quantity of the integrated energy system according to claim 1, characterized in that: The constraints of the comprehensive energy system economic dispatch optimization model include: power balance constraints, upper and lower limit constraints of unit output, unit climbing constraints and flexible load constraints, among which the power balance constraints include: electric power balance constraints, thermal power balance constraints, gas power balance constraints and cold power balance constraints.

8. The method for optimizing the quotation and quantity of the integrated energy system according to claim 1, characterized in that: The acceptable gas and electricity price table is obtained by using a retrospective table building method, and the retrospective table building method is specifically as follows: The total electricity purchase cost under different yields is calculated by back-testing method, and the acceptable gas / electricity unit price under different yields is determined based on the total electricity purchase cost obtained; Establish a table of acceptable gas and electricity unit prices based on rate of return, acceptable gas / electricity unit prices, and total electricity purchase costs.

9. The method for optimizing the quotation and quantity of the integrated energy system according to claim 1, characterized in that: The marginal price of purchased energy is calculated in the following way: According to the user's demand for electricity, heating and cooling, the required power and gas power are determined through the conversion of the integrated energy system; The marginal price of electricity purchase is determined by the ratio of the electricity purchase cost in the total energy purchase cost to the required power purchase; The marginal price of gas purchase is determined by the ratio of the gas formation cost in the total energy purchase cost to the required gas purchase power.

10. An integrated energy system quotation and quantity optimization device, characterized in that: include: The revenue calculation module is used to calculate the total revenue of the integrated energy system based on the user's electric heating and cooling demand and adjustable load; A cost calculation module, for calculating the total energy purchase cost based on a given rate of return according to the total revenue and the expected maximum revenue of the integrated energy system; A determination module is used to determine the time-of-use energy purchase amount and the optimal energy purchase cost based on the user's electric heating and cooling demand and the market energy purchase unit price using an integrated energy system economic dispatch optimization model; A judgment module, used for judging whether the total energy purchase cost is less than the optimal energy purchase cost; A first quotation module is used to adjust the total energy purchase cost by using an acceptable gas and electricity price table when the total energy purchase cost is less than the optimal energy purchase cost, and calculate the energy purchase marginal price by using the adjusted total energy purchase cost, and quote the energy purchase marginal price as an acceptable price; The second quotation module is used to directly use the total energy purchase cost to calculate the energy purchase marginal price when the total energy purchase cost is not less than the optimal energy purchase cost, and quote the energy purchase marginal price as an acceptable price.

11. The integrated energy system quotation and quantity optimization device according to claim 10, characterized in that: The revenue calculation module includes: The first calculation unit is used to obtain the energy supply income of the integrated energy system according to the user's electric heating and cooling demand and the corresponding retail price; The second calculation unit is used to calculate the demand response benefits and spot market benefits brought by the adjustable load; The summing unit is used to sum the energy supply income, demand response income and spot market income to obtain the total income of the integrated energy system.

12. The integrated energy system quotation and quantity optimization device according to claim 11, characterized in that: The first computing unit Calculate the energy supply benefits of the integrated energy system, where R RIES For energy benefit, is the electricity selling price, is the electric power sold during period t, For hot selling price, is the thermal power sold during period t, To sell at a cold price, is the cooling power sold during period t, T is the number of operating periods in a day, and Δt is the unit time.

13. The integrated energy system quotation and quantity optimization device according to claim 11, characterized in that: The second computing unit is Calculate the demand response benefits by Calculate the spot market return, where R CL is the demand response benefit, δ e The electric load compensation coefficient can be reduced by is the load that can be reduced during period t, δ h The heat load compensation coefficient can be reduced by is the heat load that can be reduced during period t, R SL is the spot market return, ξ e is the unit transferable electric load incentive coefficient, is the transferable load in period t, ξ h is the unit transferable heat load excitation coefficient, is the heat load that can be transferred during period t, T is the number of operating periods in a day, and Δt is the unit time.

14. The integrated energy system quotation and quantity optimization device according to claim 10, characterized in that: The cost calculation module is implemented by R B =R SUM -R MAX ηCalculate the total energy purchase cost, where R B is the total energy purchase cost, R SUM is the total benefit of the integrated energy system, R MAX is the expected maximum return, and η is the rate of return.

15. The integrated energy system quotation and quantity optimization device according to claim 10, characterized in that: The economic dispatch optimization model of the integrated energy system aims to minimize the daily operating cost of the integrated energy system, and its objective function is expressed as: minF cost =F BE +F BG , where F cost is the daily operating cost of the integrated energy system, F BE is the electricity purchase cost of the comprehensive energy system, expressed as: in, is the market electricity purchase price during period t, is the electric power exchanged with the energy market during period t, F BG is the gas purchase cost of the comprehensive energy system, expressed as: is the market gas purchase price during period t, is the gas power exchanged with the energy market during period t, T is the number of operating periods in a day, and Δt is the unit time.

16. The integrated energy system quotation and quantity optimization device according to claim 10, characterized in that: The constraints of the comprehensive energy system economic dispatch optimization model include: power balance constraints, upper and lower limit constraints of unit output, unit climbing constraints and flexible load constraints, among which the power balance constraints include: electric power balance constraints, thermal power balance constraints, gas power balance constraints and cold power balance constraints.

17. The integrated energy system quotation and quantity optimization device according to claim 10, characterized in that: The acceptable gas and electricity price table is obtained by using a retrospective table building method, and the retrospective table building method is specifically as follows: The total electricity purchase cost under different yields is calculated by back-testing method, and the acceptable gas / electricity unit price under different yields is determined based on the total electricity purchase cost obtained; Establish a table of acceptable gas and electricity unit prices based on rate of return, acceptable gas / electricity unit prices, and total electricity purchase costs.

18. The integrated energy system quotation and quantity optimization device according to claim 10, characterized in that: The first quotation module and the second quotation module both include: A determination unit, used to determine the required purchased electricity power and gas power through conversion of the integrated energy system according to the electric heating and cooling demand of the user side; The electricity quotation unit is used to determine the marginal price of electricity purchase by the ratio of the electricity purchase cost in the total energy purchase cost to the required electricity purchase power; The gas quotation unit is used to determine the marginal price of gas purchase by the ratio of the gas cost in the total energy purchase cost to the required gas purchase power.

19. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the comprehensive energy system quotation and quantity optimization method as described in any one of claims 1-9 are implemented.

20. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for optimizing the quotation and quantity reporting of an integrated energy system as described in any one of claims 1 to 9 are implemented.

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