Carbon emission evaluation method, device, equipment, medium and product of park integrated energy system

Abstract

The invention discloses a carbon emission evaluation method, device, equipment, medium and product of a park integrated energy system. The method comprises the following steps: constructing target constraints of a park integrated energy system, wherein the target constraints comprise a renewable energy output constraint and a power balance constraint; under the condition of meeting the target constraint, determining the carbon transaction cost of the park integrated energy system in a preset planning period; under the condition of meeting the target constraint, determining the system association cost of the park integrated energy system in a preset planning period; constructing a life cycle cost objective function of the park integrated energy system; determining the minimum life cycle cost of the park integrated energy system according to the carbon transaction cost and the system association cost in the preset planning cycle under the condition of meeting the target constraint when the function value of the generation cycle cost target function is minimum; and according to the minimum life cycle cost of the park integrated energy system, evaluating the carbon emission of the park integrated energy system.

Description

Technical Field

[0001] The present invention relates to the technical field of integrated energy system planning, and in particular to a carbon emission assessment method, device, equipment, medium and product for an integrated energy system of a park. Background Art

[0002] The planning and development of the park's integrated energy system faces multiple challenges. With the rapid development of renewable energy, the investment costs of wind power, photovoltaics and other equipment are uncertain, which brings difficulties to system investment decisions. At the same time, with the gradual opening of the energy market and the establishment of a carbon trading mechanism, how to reasonably allocate resources in the market, reduce operating costs, and reduce carbon emissions has become a key consideration in system planning. Therefore, the accurate calculation and evaluation of the evolution results of the system's total carbon emissions and carbon emission costs has become an urgent problem to be solved. Summary of the invention

[0003] The present invention provides a carbon emission assessment method, device, equipment, medium and product for a park integrated energy system, so as to achieve accurate evolution and assessment of indicators such as the total carbon emissions and carbon emission transaction costs of the park integrated energy system.

[0004] According to one aspect of the present invention, a method for evaluating carbon emissions of a park integrated energy system is provided, the method comprising:

[0005] Establish renewable energy output constraints based on the output power of wind power equipment and photovoltaic equipment in the park's integrated energy system;

[0006] Constructing a power balance constraint according to the equipment power of each energy device in the park comprehensive energy system; the park comprehensive energy system includes at least one energy device;

[0007] generating a target constraint including the renewable energy output constraint and the power balance constraint;

[0008] Under the condition of satisfying the target constraints, determining the carbon trading cost of the park integrated energy system within a preset planning period;

[0009] Under the condition that the target constraints are met, determining the system-related costs of the park integrated energy system within a preset planning period;

[0010] Constructing a life cycle cost objective function for the integrated energy system of the park;

[0011] Under the condition of satisfying the target constraints, based on the carbon trading costs and system-related costs within the preset planning period, determine the minimum life cycle cost of the park integrated energy system when the function value of the generation cycle cost objective function is minimized;

[0012] The carbon emissions of the park's integrated energy system are evaluated based on the minimum life cycle cost of the park's integrated energy system.

[0013] According to another aspect of the present invention, a carbon emission assessment device for a park integrated energy system is provided, the device comprising:

[0014] Energy constraint building module, used to build renewable energy output constraints based on the output power of wind power equipment and photovoltaic equipment in the park's integrated energy system;

[0015] A power constraint building module, used to build a power balance constraint according to the equipment power of each energy device in the park comprehensive energy system; the park comprehensive energy system includes at least one energy device;

[0016] A target constraint generation module, used to generate a target constraint including the renewable energy output constraint and the power balance constraint;

[0017] A carbon trading cost determination module, used to determine the carbon trading cost of the park integrated energy system within a preset planning period under the condition of satisfying the target constraint;

[0018] An associated cost determination module, used to determine the system associated cost of the park integrated energy system within a preset planning period under the condition that the target constraint is met;

[0019] An objective function construction module, used to construct a life cycle cost objective function of the park integrated energy system;

[0020] A cycle cost determination module is used to determine the minimum life cycle cost of the park integrated energy system when the function value of the generation cycle cost objective function is minimized according to the carbon trading cost and system-related cost within a preset planning period under the condition that the target constraint is met;

[0021] The carbon emission assessment module is used to assess the carbon emission of the park comprehensive energy system according to the minimum life cycle cost of the park comprehensive energy system.

[0022] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0023] at least one processor; and

[0024] a memory communicatively connected to the at least one processor; wherein,

[0025] The memory stores a computer program that can be executed by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the carbon emission assessment method for the park integrated energy system described in any embodiment of the present invention.

[0026] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the carbon emission assessment method for a campus integrated energy system described in any embodiment of the present invention when executed.

[0027] According to another aspect of the present invention, a computer program product is provided, including a computer program, which, when executed by a processor, implements the carbon emission assessment method for a campus integrated energy system described in any embodiment of the present invention.

[0028] The above-mentioned embodiment of the present invention fully reflects the energy conversion process by simulating the low-carbon planning model of the park integrated energy system of the carbon trading mechanism. A carbon trading cost model based on the step-by-step carbon trading mechanism is constructed to calculate the transaction costs under different carbon emission levels. On this basis, the investment, operation, maintenance and carbon trading costs are included in the full life cycle costs, and the objective function is to minimize the present value of the full life cycle costs discounted to the initial year of investment, thereby achieving the optimal balance between economy and low carbon. In addition, the present invention takes into account the problem of carbon quota allocation, and analyzes the evolution path composed of a large number of uncertain factors through the Monte Carlo model, and obtains the optimal evolution path with the minimum cost and carbon emissions, thereby achieving the accurate evolution and evaluation of indicators such as the total carbon emissions and carbon emission trading costs of the park integrated energy system.

[0029] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 is a flow chart of a carbon emission assessment method for a park integrated energy system provided according to Embodiment 1 of the present invention;

[0032] Figure 2This is a schematic diagram of the structure of a carbon emission assessment device for a park integrated energy system provided according to Embodiment 2 of the present invention;

[0033] Figure 3 It is a structural schematic diagram of an electronic device for implementing the carbon emission assessment method of the park integrated energy system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0035] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0036] Embodiment 1

[0037] Figure 1 This is a flow chart of a carbon emission assessment method for a park integrated energy system provided in the first embodiment of the present invention. This embodiment can be applied to the situation where the park integrated energy system is optimally evolved and assessed with minimum system cost and carbon emission. This method can be executed by a carbon emission assessment device for a park integrated energy system. The carbon emission assessment device for a park integrated energy system can be implemented in the form of hardware and / or software. The carbon emission assessment device for a park integrated energy system can be configured in an electronic device. Figure 1 As shown, the method includes:

[0038] S110. Establish renewable energy output constraints based on the output power of wind power equipment and photovoltaic equipment in the park's integrated energy system;

[0039] S120, constructing a power balance constraint according to the equipment power of each energy device in the park comprehensive energy system; the park comprehensive energy system includes at least one energy device;

[0040] S130, generating target constraints including renewable energy output constraints and power balance constraints;

[0041] S140. Under the condition of meeting the target constraints, determine the carbon trading cost of the park's integrated energy system within the preset planning period;

[0042] S150, under the condition of satisfying the target constraints, determining the system-related costs of the park comprehensive energy system within a preset planning period;

[0043] S160, construct the life cycle cost objective function of the park's integrated energy system;

[0044] S170, under the condition of satisfying the target constraints, according to the carbon trading costs and system-related costs within the preset planning period, determine the minimum life cycle cost of the park integrated energy system when the function value of the generation cycle cost objective function is minimized;

[0045] S180. Evaluate the carbon emissions of the park's integrated energy system based on the minimum life cycle cost of the park's integrated energy system.

[0046] Among them, the input end of the park's comprehensive energy system is a stable energy supply system jointly constructed by the wind turbines of the upper power grid and the upper gas grid. In the process of energy conversion, equipment such as combined cooling, heating and power (CCHP), electric refrigeration (ER) and gas-fired boiler (GB) improve the overall energy utilization efficiency through efficient energy conversion and utilization. In particular, the CCHP system further optimizes the energy utilization effect through the coordinated work of gas turbines, waste heat boilers and absorption chillers (AC). The park's comprehensive energy system can respond to the needs of various energy equipment.

[0047] Among them, the park comprehensive energy system includes at least one energy device, for example, the energy equipment can be a photovoltaic device, a photovoltaic device, an EL (Electrolyzer) device, an MR (Methane Reactor) device, an HFC (Hydrogen Fuel Cell) device, a GB (Gas-fired Boiler) device, a combined heat and power (Combine Heat and Power, CHP) device, an electric refrigerator (ER) device and an absorption refrigerator (AC) device, etc.

[0048] Among them, the role of the EL device is to convert electrical energy into hydrogen energy, and the converted hydrogen energy is then used in hydrogen fuel cells for thermoelectricity production. That is, the main function is to produce thermoelectricity, but not to store energy. The mathematical model of the operating principle of the EL device is described as follows:

[0049]

[0050] Among them, P e,EL (t) is the electrical energy input to the EL device during the time period t; is the hydrogen energy output by the EL device in time period t; η EL The energy conversion efficiency or power generation efficiency of the EL device; The upper limit of the power input to the EL device.

[0051] The mathematical model of the operating principle of the MR device is described as follows:

[0052]

[0053] in, P is the hydrogen energy input to the MR device during time period t; g,MR (t) is the natural gas power output of the MR equipment in time period t; η MR The energy conversion efficiency of the MR device; It is the upper limit of hydrogen energy input into MR equipment.

[0054] HFC (hydrogen fuel cell) equipment is not an energy storage device, but combines the input hydrogen and oxygen, completes electric and thermal coupling through oxidation reaction with hydrogen as the medium, and achieves zero carbon emissions. The mathematical model of the operating principle of HFC equipment is described as follows:

[0055]

[0056] in, is the hydrogen energy input to HFC in time period t; η HFC,e is the conversion efficiency of HFC in converting hydrogen energy into electrical energy; η HFC,h P is the conversion efficiency of HFC to convert hydrogen energy into thermal energy; HFC,e (t) is the electric energy output by HFC in time period t; P HFC,h (t) is the heat energy output by HFC in time period t; It is the lower limit of the heat-to-power ratio of HFC; It is the upper limit of the heat-to-electricity ratio of HFC.

[0057] The mathematical model of the operating principle of GB (gas boiler) equipment is described as follows:

[0058]

[0059] Among them, Pg,GB (t) is the gas power input to GB in time period t; η GB is the energy conversion efficiency of GB; is the upper limit of the power input to GB; P h,GB (t) is the thermal power output of GB in time period t.

[0060] The mathematical model of the operating principle of CHP (combined heat and power) equipment is described as follows:

[0061]

[0062] Among them, P g,CHP (t) is the natural gas power input to the CHP equipment in time period t; η e,CHP is the energy conversion efficiency of CHP into electrical energy; η h,CHP The energy conversion efficiency of CHP into heat energy; is the upper limit of the power input to CHP; It is the lower limit of the thermal-to-electricity ratio of CHP; is the upper limit of the thermal-to-electricity ratio of CHP; P e,CHP (t) represents the electric energy output by the CHP unit in time period t; P h,CHP (t) represents the heat energy output by the CHP unit in time period t.

[0063] The mathematical model of the operating principle of ER (electric refrigerator) equipment is described as follows:

[0064]

[0065] Among them, P c,ER (t) is the cooling power output by ER at time t; η ER P is the conversion efficiency of the electric refrigerator; e,ER (t) is the electrical power input to ER at time t; is the upper limit of the electric power input to ER.

[0066] The mathematical model of the operating principle of AC (absorption chiller) equipment is described as follows:

[0067]

[0068] Among them, P c,AC (t) is the cooling power output of AC at time t; η AC is the cooling conversion efficiency of the AC equipment; P h,AC (t) is the thermal power input to AC at time t; It is the upper limit of the thermal power of the input AC.

[0069] The energy equipment of the park's comprehensive energy system can also be energy storage equipment, such as electric energy storage equipment, thermal energy storage equipment, gas energy storage equipment, and hydrogen energy storage equipment. Since the models of various energy storage equipment are similar, the energy storage equipment can be uniformly modeled. The mathematical model expression of the operating principle of the energy storage equipment is as follows:

[0070]

[0071] Among them, i∈Ω,Ω={ES,HS,GS,H2S}, where ES is the electric energy storage device, HS is the thermal energy storage device, GS is the gas energy storage device, and H2S is the hydrogen energy storage device. is the charging power of the i-th energy storage device at time t; is the energy release power of the i-th energy storage device at time t; and are the maximum power of a single charge and discharge of the i-th energy storage device; and are the charging state parameters and discharging state parameters of the i-th energy storage device at time t, respectively, and their ratio values ​​are expressed in binary variables. That is, when When When , the energy storage device is in the energy discharging state; and They are the charging efficiency and discharging efficiency of the energy storage device respectively; and are the upper and lower limits of the equipment capacity of the i-th energy storage device respectively.

[0072] Among them, the energy equipment of the park comprehensive energy system also includes wind power equipment and photovoltaic equipment. Exemplarily, according to the output power of wind power equipment and photovoltaic equipment in the park comprehensive energy system, the renewable energy output constraint is constructed. Among them, the expression form of the renewable energy output constraint is as follows:

[0073]

[0074] Among them, P w,t and P pv,t They represent the output power of wind power equipment and photovoltaic equipment during period t respectively; and The upper limit of wind power equipment output power and the lower limit of photovoltaic equipment output power respectively; and They represent the upper limit of wind power equipment capacity and the upper limit of photovoltaic equipment capacity respectively.

[0075] Since photovoltaic equipment and wind power equipment have great randomness and volatility, in order to reduce the pressure on the main grid, the park's integrated energy system does not consider selling electricity to the superior power grid, and selling natural gas to the superior gas grid. According to the equipment power of each energy device in the park's integrated energy system, a power balance constraint is constructed. Among them, the power balance constraint includes the electric power balance constraint. The expression of the electric power balance constraint is as follows:

[0076]

[0077] Among them, P e,load,n (t) represents the electric load power in period t of year n; and They represent the discharge power and charging power of the energy storage device at time t in the nth year. w,n (t) represents the output power of wind power equipment in the t period of the nth year; P pv,n (t) represents the output power of the photovoltaic equipment in the period t of the nth year; P e,buy,n (t) represents the power purchased by the park's integrated energy system from the upper power grid in the t period of the nth year; P e,HFC,n (t) represents the output power of the HFC equipment in the period t of the nth year; P e,CHP,n (t) represents the power supply power of the CHP unit in the t period of the nth year; P e,EL,n (t) represents the electric power input to the EL device in the period t in the nth year; P e,ER,n (t) represents the electric power input to the ER equipment in period t in year n. Indicates the upper limit of purchased electric power.

[0078] The thermal power balance constraint is expressed as follows:

[0079]

[0080] Among them, P h,load,n (t) represents the heat load power in the period t of the nth year; and They represent the heat release power and heat charging power of the thermal energy storage device at time t in the nth year respectively; P h,CHP,n (t) represents the heat energy output by the CHP unit in the period t of the nth year; P h,GB,n (t) represents the thermal power output of GB equipment in the nth year and the tth period; P h,HFC,n (t) represents the heat energy output by the HFC equipment in the period t of the nth year; P h,AC,n (t) represents the thermal power input to the AC equipment in period t in year n.

[0081] The expression of the gas power balance constraint is as follows:

[0082]

[0083] Among them, P g,load,n (t) represents the gas load power in the period t of the nth year; and They represent the deflation power and charging power of the gas energy storage device in the t period of the nth year respectively; P g,buy,n (t) represents the gas power purchased by the park's integrated energy system from the upper power grid in the t period of the nth year; P g,MR,n (t) represents the natural gas power output of the MR equipment in the period t of the nth year; P g,GB,n (t) represents the gas power input to GB equipment in the period t of the nth year; P g,CHP,n (t) represents the natural gas power input to the CHP equipment in the period t in the nth year; It indicates the upper limit of gas power purchased in period t in year n.

[0084] The cold power balance constraint is expressed as follows:

[0085] P c,ER,n (t)+P c,AC,n (t) = P c,load,n (t);

[0086] Among them, P c,load,n (t) represents the cooling load power in the period t of the nth year; P c,ER,n (t) represents the cooling power output of the ER equipment in the period t of the nth year; P c,AC,n (t) represents the cooling power output by the AC equipment in period t of year n.

[0087] The hydrogen balance constraint is expressed as follows:

[0088]

[0089] in, represents the hydrogen energy output by the EL device in time period t in year n; and They represent the hydrogen discharge power and hydrogen charging power of the hydrogen energy storage device in the nth year and tth period respectively; represents the hydrogen energy input to the MR equipment in the nth year and the tth period; It represents the hydrogen energy input into the HFC equipment in the nth year and the tth period.

[0090] Since the energy storage device needs to return to the state at the beginning of the dispatch after running a dispatch cycle, the constraints for constructing the energy storage device are as follows:

[0091] S i (t0) = S i (t T );

[0092] Among them, S i (t0) is the capacity of the i-th energy storage device in the time period t0; S i (t T ) is the i-th energy storage device at t T Capacity under the scheduling period.

[0093] Under the condition of meeting the above-mentioned target constraints, determine the carbon trading cost of the park's integrated energy system within the preset planning period.

[0094] In an optional embodiment, under the condition of meeting the target constraints, the carbon trading cost of the park comprehensive energy system within the preset planning period is determined, including: under the condition of meeting the target constraints, determining the actual carbon emissions and carbon emission quotas of the park comprehensive energy system; determining the traded carbon emissions of the park comprehensive energy system based on the actual carbon emissions and carbon emission quotas; determining the carbon trading cost of the park comprehensive energy system within the preset planning period based on the traded carbon emissions.

[0095] Among them, under the conditions of meeting the target constraints, the actual carbon emissions of the park's comprehensive energy system are determined, including: according to the heating power of the gas boiler equipment in the park's comprehensive energy system, the first actual carbon emissions of the gas boiler are determined; according to the purchased power of the park's comprehensive energy system, the second actual carbon emissions of purchased electricity are determined; according to the heating power and power supply power of the cogeneration equipment of the park's comprehensive energy system, the third actual carbon emissions of the cogeneration equipment are determined; based on the first actual carbon emissions, the second actual carbon emissions and the third actual carbon emissions, the actual carbon emissions of the park's comprehensive energy system are determined.

[0096] The carbon emissions in the park's comprehensive energy system mainly come from three carbon emission sources: purchased electricity, gas turbines, and gas boilers. Considering that all the purchased electricity from the upper power grid comes from thermal power units (CHP), the first actual carbon emissions of the gas boiler are determined according to the heating power of the gas boiler equipment in the park's comprehensive energy system. GB The way is as follows:

[0097]

[0098] Among them, μ h Indicates the carbon emission intensity per unit heat; P h,GB (t) is the thermal power output of GB in time period t; T is pre-set by relevant technical personnel. Since the carbon trading cost is calculated on an annual basis, it can be set to 8760.

[0099] According to the purchased power of the park's comprehensive energy system, determine the second actual carbon emissions E of purchased electricity e,buy The way is as follows:

[0100]

[0101] Among them, μ e Indicates the carbon emission intensity per unit of electricity; P e,buy (t) is the power purchased by the park's integrated energy system from the superior power grid during time period t; T can be set to 8760.

[0102] According to the heating power and power supply power of the cogeneration equipment in the park's comprehensive energy system, the actual carbon emissions of the cogeneration equipment E3 are determined. CHP The way is as follows:

[0103]

[0104] in, Indicates the conversion factor of CHP unit power generation to heat generation; P h,CHP (t) is the heating power of the CHP unit during period t; P e,CHP (t) is the power supply of the CHP unit during period t.

[0105] According to the first actual carbon emissions, the second actual carbon emissions and the third actual carbon emissions, the actual carbon emissions of the park's comprehensive energy system are determined as follows:

[0106] E PIES =E e,buy +E GB +E CHP ;

[0107] Carbon emission quota E′ PIES is determined as follows:

[0108] E′ PIES =E′ e,buy +E′ GB +E′ CHP ;

[0109] Among them, E′ e,buy , E′ GB and E′ CHP They are the carbon emission quotas for purchased electricity, gas boilers and combined heat and power units.

[0110] In summary, according to the actual carbon emissions E PIES and carbon emission quota E′ PIES , the trading carbon emissions E0 of the park's integrated energy system are as follows:

[0111] E0=E PIES -E′ PIES ;

[0112] According to the trading carbon emissions E0, determine the carbon trading cost of the park's comprehensive energy system within the preset planning period The way is as follows:

[0113]

[0114] in, represents the carbon trading cost in the nth year; E 0,n represents the trading carbon emissions in the nth year; λ is the benchmark price, which can be pre-set by relevant technical personnel.

[0115] In an optional embodiment, under the condition of satisfying the target constraints, the system-associated costs of the park comprehensive energy system within the preset planning period are determined, including: under the condition of satisfying the target constraints, the system construction cost is determined according to the equipment unit price of each energy equipment in the park comprehensive energy system and the configuration capacity of each energy equipment within the preset planning period; under the condition of satisfying the target constraints, the system operation cost is determined based on the wind abandonment penalty cost per unit time according to the purchased electricity power and gas power of the park comprehensive energy system within the preset planning period; under the condition of satisfying the target constraints, the system maintenance cost is determined according to the fixed maintenance cost of each energy equipment in the park comprehensive energy system per unit power within the preset planning period; and the system-associated costs including system construction cost, system operation cost and system maintenance cost are generated.

[0116] System construction cost C inv,n is determined as follows:

[0117]

[0118] Among them, e j represents the unit price of energy equipment j; W j,n represents the configuration capacity of energy device j in the nth year; φ represents the energy device set, which can specifically include wind power equipment, photovoltaic equipment, CHP units, AC equipment, ER equipment, GB equipment, EC equipment, HFC equipment and MR equipment as well as various energy storage equipment; f j Represents a Boolean variable, which takes values ​​of 1 or 0.

[0119] In an optional embodiment, under the condition of satisfying the target constraints, the system operating cost is determined according to the purchased electricity power and gas power of the park comprehensive energy system within the preset planning period and based on the penalty cost for wind abandonment per unit time, including: under the condition of satisfying the target constraints, according to the purchased electricity power and gas power of the park comprehensive energy system within the preset planning period, based on the electricity price and gas price in the corresponding planning time period, determining the energy purchasing cost within the preset planning period; determining the wind abandonment cost within the preset planning time according to the penalty cost for wind abandonment per unit time and the wind abandonment power in the corresponding planning time period; determining the system operating cost of the park comprehensive energy system within the preset planning period according to the energy purchasing cost and the wind abandonment cost within the preset planning period.

[0120] Among them, the energy purchase cost C within the preset planning period buy,n (t) is determined as follows:

[0121]

[0122] Among them, a t and b t Respectively represent the electricity price and gas price at time t in year n; P e,buy,n (t) represents the power purchased by the park's integrated energy system from the upper power grid in the t period of the nth year; P g,buy,n (t) represents the gas power purchased by the park's integrated energy system from the superior power grid in period t of year n.

[0123] Among them, the wind abandonment cost C within the preset planning time w,cut,n (t) is determined as follows:

[0124]

[0125] Among them, c t P represents the penalty cost of unit wind curtailment; w,cut,n (t) represents the abandoned wind power of the park’s comprehensive energy system in period t of year n.

[0126] System operation cost C of the park's integrated energy system within the preset planning period open,n (t) is determined as follows:

[0127]

[0128] Among them, C buy,n (t) is the energy purchase cost within the preset planning period; C w,cut,n (t) is the wind curtailment cost within the preset planning period.

[0129] Under the condition of meeting the target constraints, the system maintenance cost C is determined according to the fixed maintenance cost of each energy device in the park comprehensive energy system under unit power within the preset planning period.main,n (t) is as follows:

[0130]

[0131] in, is the maintenance cost vector per unit power of various energy equipment; the maintenance cost vector can be obtained according to the instruction manual of each equipment product, and specifically can be the cost of maintaining the equipment under the condition of unit power; is the output power of the j-type device in period t; if the j-type device represents an energy storage device, then Represents the sum of the charging and discharging power of the energy storage device.

[0132] The life cycle cost objective function of low-carbon planning and evolution analysis of the park integrated energy system based on Monte Carlo random sampling can be expressed as:

[0133]

[0134] Where C represents the life cycle cost of the park's integrated energy system; τ is the discount rate; n represents the nth year of the planning period; N is the planning period; C inv,n represents the system construction cost of the park comprehensive energy system in the nth year; C open,n represents the system operation cost of the park comprehensive energy system in the nth year; C main,n It represents the system maintenance cost of the park's integrated energy system in the nth year.

[0135] Among them, the constraints that the above objective function needs to meet also include the carbon peak constraint:

[0136] E 0,x ≥E 0,n

[0137] Here, x means that the carbon peak will be achieved in the xth year of the plan.

[0138] After carbon emissions reach their peak, in order to ensure an orderly and steady decline in carbon emissions, it is set that in each year after the carbon peak, the traded carbon emissions must decrease year by year at a fixed rate of v%:

[0139] E 0,y+1 ≤(1-v%)·E 0,y y ≥ x;

[0140] Here, y represents the year after the carbon peak.

[0141] Considering the minimum life cycle cost, actual carbon emissions and carbon trading costs of the park's integrated energy system, the low-carbon cost of the park's integrated energy system is optimized, and the carbon emissions and carbon trading costs are evaluated. The indicator δ that can be used to evaluate the effect of the evolution path is used for evaluation:

[0142]

[0143] Among them, δ represents the low-carbon cost optimization benefit evaluation index. ω1, ω2 and ω3 represent weight coefficients, which can be pre-set by relevant technical personnel.

[0144] The above-mentioned embodiment of the present invention fully reflects the energy conversion process by simulating the low-carbon planning model of the park integrated energy system of the carbon trading mechanism. A carbon trading cost model based on the step-by-step carbon trading mechanism is constructed to calculate the transaction costs under different carbon emission levels. On this basis, the investment, operation, maintenance and carbon trading costs are included in the full life cycle costs, and the objective function is to minimize the present value of the full life cycle costs discounted to the initial year of investment, thereby achieving the optimal balance between economy and low carbon. In addition, the present invention takes into account the problem of carbon quota allocation, and analyzes the evolution path composed of a large number of uncertain factors through the Monte Carlo model, and obtains the optimal evolution path with the minimum cost and carbon emissions, thereby achieving the accurate evolution and evaluation of indicators such as the total carbon emissions and carbon emission trading costs of the park integrated energy system.

[0145] Embodiment 2

[0146] Figure 2 A schematic diagram of the structure of a carbon emission assessment device for a park integrated energy system provided in the second embodiment of the present invention. A carbon emission assessment device for a park integrated energy system provided in the embodiment of the present invention can be applied to the situation where the park integrated energy system is optimally evolved and assessed with minimum system cost and carbon emission. The carbon emission assessment device for the park integrated energy system can be implemented in the form of hardware and / or software, such as Figure 2 As shown, the carbon emission assessment device of the park integrated energy system can be configured in an electronic device, specifically including: energy constraint construction module 201, power constraint construction module 202, target constraint generation module 203, carbon transaction cost determination module 204, associated cost determination module 205, objective function construction module 206, cycle cost determination module 207 and carbon emission assessment module 208. Among them,

[0147] The energy constraint building module 201 is used to build renewable energy output constraints according to the output power of wind power equipment and photovoltaic equipment in the park comprehensive energy system;

[0148] A power constraint building module 202 is used to build a power balance constraint according to the equipment power of each energy device in the park comprehensive energy system; the park comprehensive energy system includes at least one energy device;

[0149] A target constraint generating module 203, configured to generate a target constraint including the renewable energy output constraint and the power balance constraint;

[0150] The carbon trading cost determination module 204 is used to determine the carbon trading cost of the park integrated energy system within a preset planning period under the condition that the target constraint is met;

[0151] The associated cost determination module 205 is used to determine the system associated cost of the park integrated energy system within a preset planning period under the condition that the target constraint is met;

[0152] An objective function construction module 206 is used to construct a life cycle cost objective function of the park integrated energy system;

[0153] The cycle cost determination module 207 is used to determine the minimum life cycle cost of the park integrated energy system when the function value of the generation cycle cost objective function is minimized according to the carbon trading cost and system associated cost within the preset planning period under the condition that the target constraint is met;

[0154] The carbon emission assessment module 208 is used to assess the carbon emission of the park integrated energy system according to the minimum life cycle cost of the park integrated energy system.

[0155] The above-mentioned embodiment of the present invention fully reflects the energy conversion process by simulating the low-carbon planning model of the park integrated energy system of the carbon trading mechanism. A carbon trading cost model based on the step-by-step carbon trading mechanism is constructed to calculate the transaction costs under different carbon emission levels. On this basis, the investment, operation, maintenance and carbon trading costs are included in the full life cycle costs, and the objective function is to minimize the present value of the full life cycle costs discounted to the initial year of investment, thereby achieving the optimal balance between economy and low carbon. In addition, the present invention takes into account the problem of carbon quota allocation, and analyzes the evolution path composed of a large number of uncertain factors through the Monte Carlo model, and obtains the optimal evolution path with the minimum cost and carbon emissions, thereby achieving the accurate evolution and evaluation of indicators such as the total carbon emissions and carbon emission trading costs of the park integrated energy system.

[0156] Optionally, the carbon transaction cost determination module 204 includes:

[0157] An actual carbon emission determination unit, used to determine the actual carbon emission and carbon emission quota of the park comprehensive energy system under the condition of satisfying the target constraint;

[0158] A trading carbon emission determination unit, used to determine the trading carbon emission of the park comprehensive energy system according to the actual carbon emission and the carbon emission quota;

[0159] The carbon trading cost determination unit is used to determine the carbon trading cost of the park comprehensive energy system within a preset planning period according to the traded carbon emissions.

[0160] Optional, actual carbon emissions determination unit, including:

[0161] A first emission determination subunit is used to determine a first actual carbon emission of the gas boiler according to the heating power of the gas boiler equipment in the park comprehensive energy system;

[0162] A second emission determination subunit is used to determine a second actual carbon emission of purchased electricity according to the purchased power of the park comprehensive energy system;

[0163] A third emission determination subunit is used to determine a third actual carbon emission of the cogeneration equipment according to the heating power and power supply power of the cogeneration equipment of the park comprehensive energy system;

[0164] The actual carbon emissions determination subunit is used to determine the actual carbon emissions of the park comprehensive energy system based on the first actual carbon emissions, the second actual carbon emissions and the third actual carbon emissions.

[0165] Optionally, the associated cost determination module 205 includes:

[0166] A system construction cost determination unit, used to determine the system construction cost according to the equipment unit price of each energy device in the park comprehensive energy system and the configuration capacity of each energy device in the preset planning period under the condition of satisfying the target constraint;

[0167] A system operation cost determination unit, configured to determine the system operation cost based on the wind abandonment penalty cost per unit time according to the purchased electricity power and purchased gas power of the park comprehensive energy system within the preset planning period, under the condition that the target constraint is met;

[0168] A system maintenance cost determination unit, configured to determine the system maintenance cost according to the fixed maintenance cost per unit power of each energy device in the park integrated energy system within the preset planning period, under the condition that the target constraint is met;

[0169] The system-related cost generating unit is used to generate the system-related cost including the system construction cost, the system operation cost and the system maintenance cost.

[0170] Optionally, the system operation cost determination unit includes:

[0171] The energy cost determination subunit is used to determine the energy purchase cost within the preset planning period based on the purchased electricity power and purchased gas power of the park comprehensive energy system within the preset planning period and based on the electricity price and gas price in the corresponding planning time period under the condition that the target constraint is met;

[0172] A wind abandonment cost determination subunit is used to determine the wind abandonment cost within a preset planning time according to the wind abandonment penalty cost within a unit time and the wind abandonment power in a corresponding planning time period;

[0173] The system operation cost determination subunit is used to determine the system operation cost of the park comprehensive energy system within the preset planning period based on the energy purchase cost and wind abandonment cost within the preset planning period.

[0174] The carbon emission assessment device for a park integrated energy system provided in an embodiment of the present invention can execute the carbon emission assessment method for a park integrated energy system provided in any embodiment of the present invention, and has functional modules and beneficial effects corresponding to the execution method.

[0175] Embodiment 3

[0176] Figure 3 A schematic diagram of the structure of an electronic device 30 that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0177] like Figure 3 As shown, the electronic device 30 includes at least one processor 31, and a memory connected to the at least one processor 31, such as a read-only memory (ROM) 32, a random access memory (RAM) 33, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 31 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 32 or the computer program loaded from the storage unit 38 to the random access memory (RAM) 33. In the RAM 33, various programs and data required for the operation of the electronic device 30 can also be stored. The processor 31, the ROM 32, and the RAM 33 are connected to each other through a bus 34. An input / output (I / O) interface 35 is also connected to the bus 34.

[0178] A number of components in the electronic device 30 are connected to the I / O interface 35, including: an input unit 36, such as a keyboard, a mouse, etc.; an output unit 37, such as various types of displays, speakers, etc.; a storage unit 38, such as a disk, an optical disk, etc.; and a communication unit 39, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 39 allows the electronic device 30 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0179] The processor 31 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 31 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, digital signal processors (DSPs), and any appropriate processors, controllers, microcontrollers, etc. The processor 31 executes the various methods and processes described above, such as a carbon emission assessment method for a park integrated energy system.

[0180] In some embodiments, the carbon emission assessment method for the park integrated energy system may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 38. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 30 via the ROM 32 and / or the communication unit 39. When the computer program is loaded into the RAM 33 and executed by the processor 31, one or more steps of the carbon emission assessment method for the park integrated energy system described above may be performed. Alternatively, in other embodiments, the processor 31 may be configured to execute the carbon emission assessment method for the park integrated energy system in any other appropriate manner (e.g., by means of firmware).

[0181] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0182] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0183] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0184] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0185] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0186] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0187] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0188] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A carbon emission assessment method for a park integrated energy system, characterized in that: include: Establish renewable energy output constraints based on the output power of wind power equipment and photovoltaic equipment in the park's integrated energy system; Constructing a power balance constraint according to the equipment power of each energy device in the park comprehensive energy system; the park comprehensive energy system includes at least one energy device; generating a target constraint including the renewable energy output constraint and the power balance constraint; Under the condition of satisfying the target constraints, determining the carbon trading cost of the park integrated energy system within a preset planning period; Under the condition that the target constraints are met, determining the system-related costs of the park integrated energy system within a preset planning period; Constructing a life cycle cost objective function for the integrated energy system of the park; Under the condition of satisfying the target constraints, based on the carbon trading costs and system-related costs within the preset planning period, determine the minimum life cycle cost of the park integrated energy system when the function value of the generation cycle cost objective function is minimized; The carbon emissions of the park's integrated energy system are evaluated based on the minimum life cycle cost of the park's integrated energy system.

2. The method according to claim 1, characterized in that The step of determining the carbon trading cost of the park integrated energy system within a preset planning period under the condition that the target constraint is met includes: Under the target constraint conditions, determine the actual carbon emissions and carbon emission quota of the park's comprehensive energy system; Determine the traded carbon emissions of the park's integrated energy system based on the actual carbon emissions and the carbon emission quota; The carbon trading cost of the park comprehensive energy system within a preset planning period is determined based on the traded carbon emissions.

3. The method according to claim 2, characterized in that Under the target constraint conditions, the actual carbon emissions of the park comprehensive energy system are determined, including: Determining a first actual carbon emission of the gas boiler according to the heating power of the gas boiler equipment in the park comprehensive energy system; Determine a second actual carbon emission of purchased electricity based on the purchased power of the park's integrated energy system; Determine the third actual carbon emissions of the cogeneration equipment according to the heating power and power supply power of the cogeneration equipment of the park comprehensive energy system; The actual carbon emissions of the park comprehensive energy system are determined based on the first actual carbon emissions, the second actual carbon emissions and the third actual carbon emissions.

4. The method according to claim 1, characterized in that: The determining of the system associated cost of the park integrated energy system within a preset planning period under the condition that the target constraint is met includes: Under the condition of satisfying the target constraints, the system construction cost is determined according to the equipment unit price of each energy device in the park comprehensive energy system and the configuration capacity of each energy device in the preset planning period; Under the condition of satisfying the target constraints, the system operation cost is determined based on the wind abandonment penalty cost per unit time according to the purchased electricity power and gas power of the park integrated energy system within the preset planning period; Under the condition of satisfying the target constraint, determining the system maintenance cost according to the fixed maintenance cost per unit power of each energy device in the park integrated energy system within the preset planning period; A system-related cost including the system construction cost, the system operation cost, and the system maintenance cost is generated.

5. The method according to claim 4, characterized in that Under the condition of satisfying the target constraint, according to the purchased electricity power and purchased gas power of the park comprehensive energy system within the preset planning period, based on the wind abandonment penalty cost per unit time, the system operation cost is determined, including: Under the condition that the target constraints are met, according to the purchased electricity power and gas power of the park comprehensive energy system in the preset planning period, based on the electricity price and gas price in the corresponding planning time period, determine the energy purchase cost within the preset planning period; Determine the wind curtailment cost within the preset planning time based on the wind curtailment penalty cost per unit time and the wind curtailment power in the corresponding planning time period; Based on the energy purchase cost and wind abandonment cost within the preset planning period, the system operation cost of the park comprehensive energy system within the preset planning period is determined.

6. A carbon emission assessment device for a park integrated energy system, characterized in that: include: Energy constraint building module, which is used to build renewable energy output constraints based on the output power of wind power equipment and photovoltaic equipment in the park's integrated energy system; A power constraint building module, used to build a power balance constraint according to the equipment power of each energy device in the park comprehensive energy system; the park comprehensive energy system includes at least one energy device; A target constraint generation module, used to generate a target constraint including the renewable energy output constraint and the power balance constraint; A carbon trading cost determination module, used to determine the carbon trading cost of the park integrated energy system within a preset planning period under the condition of satisfying the target constraint; An associated cost determination module, used to determine the system associated cost of the park integrated energy system within a preset planning period under the condition that the target constraint is met; An objective function construction module, used to construct a life cycle cost objective function of the park integrated energy system; A cycle cost determination module is used to determine the minimum life cycle cost of the park integrated energy system when the function value of the generation cycle cost objective function is minimized according to the carbon trading cost and system-related cost within a preset planning period under the condition that the target constraint is met; The carbon emission assessment module is used to assess the carbon emission of the park comprehensive energy system according to the minimum life cycle cost of the park comprehensive energy system.

7. The device according to claim 6, characterized in that The carbon trading cost determination module includes: An actual carbon emission determination unit, used to determine the actual carbon emission and carbon emission quota of the park comprehensive energy system under the condition of satisfying the target constraint; A trading carbon emission determination unit, used to determine the trading carbon emission of the park comprehensive energy system according to the actual carbon emission and the carbon emission quota; The carbon trading cost determination unit is used to determine the carbon trading cost of the park comprehensive energy system within a preset planning period according to the traded carbon emissions.

8. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the carbon emission assessment method for the park integrated energy system described in any one of claims 1-5.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the carbon emission assessment method for a campus integrated energy system according to any one of claims 1 to 5 when executed.

10. A computer program product, characterized in that The computer program product comprises a computer program, which, when executed by a processor, implements the carbon emission assessment method for a park integrated energy system according to any one of claims 1 to 5.

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