Method and device for evaluating and quantifying cost of thermal power generating unit in multiple scenes

Abstract

The invention relates to a thermal power generating unit cost evaluation quantification method and device under multiple scenes. The method comprises the following steps: acquiring operation parameters of a thermal power generating unit; dividing different operation scenes based on the operation parameters of the thermal power generating unit; respectively selecting typical working conditions in corresponding operation scenes based on different operation scenes of the thermal power generating unit; different operation costs of the thermal power generating unit are calculated based on different typical working conditions in different operation scenes, and the total cost is calculated according to the different operation costs of the thermal power generating unit; and comparing and analyzing the cost difference under each typical working condition according to the total cost of different typical working conditions under different operation scenes. According to the method, the cost composition can be comprehensively analyzed according to the operation state and the energy consumption characteristics of the thermal power generating unit in combination with different operation scenes, so that the problem that the calculation result is inaccurate due to the fact that the scene is single and the cost composition is not comprehensive during cost calculation of the existing thermal power generating unit is solved, the accuracy of the calculation result is improved, and the evaluation result is more accurate.

Description

Technical Field

[0001] The present application relates to the technical field of thermal power cost assessment, and specifically to a method and device for quantifying the cost assessment of thermal power units in multiple scenarios. Background Art

[0002] With the rapid development of clean, low-carbon, safe and efficient new energy systems, higher requirements are put forward for optimizing energy structure and clean and efficient utilization of coal. Although coal-fired thermal power units have certain load adjustment capabilities, they have problems such as small adjustment range, slow adjustment rate, and reduced safety and economy when the load changes over a large range. Therefore, it is necessary to accelerate the flexibility transformation of thermal power units to effectively improve the utilization efficiency of electric coal, promote the consumption of clean energy, promote the clean and low-carbon transformation of coal-fired power, and then build a new power system. In order to achieve flexible operation of coal-fired power units and enhance the survival ability of coal-fired power units, it is necessary to transform the equipment and systems of existing units to give full play to the flexible operation potential of coal-fired power units. The flexibility of thermal power units mainly lies in "depth" and "speed". The so-called "depth" means that the unit has a wider load adjustment range, and the load lower limit can be adjusted to 30% of the rated load; the so-called "speed" means that the unit has a faster load change rate, higher load adjustment accuracy and better primary frequency regulation performance. Most of the existing studies on the flexibility transformation of thermal power units analyze the impact of the flexibility transformation of thermal power units on economic benefits by analyzing the unit operation data. However, most of the studies on costs only focus on the fuel consumption cost of the unit, and do not take into account the hidden costs (pollutant emission costs, life loss costs and solid waste costs). At the same time, when the thermal power unit is in deep peak regulation, it is in a low-load operation state, the boiler efficiency is reduced, the coal consumption of the unit will increase significantly, the fuel consumption increases, and the emissions of coal slag, fly ash and pollutants will increase. With the rapid change of load, the thermal power unit also needs to adjust its fuel supply to match the output power. This frequent adjustment will cause fluctuations in the fuel consumption rate, and frequent load adjustments will cause the thermal expansion, contraction, fatigue and other phenomena of the unit equipment to increase, thereby accelerating the wear and aging of the equipment and increasing the life loss cost. However, the existing flexibility transformation process of thermal power units does not take into account the cost changes caused by different operating scenarios. In summary, the existing flexibility transformation does not fully consider the operating costs under different operating scenarios, and the accuracy of its results is low. Summary of the invention

[0003] In order to overcome the shortcomings of the above-mentioned prior art, the present application provides a method and device for quantifying the cost assessment of thermal power units in multiple scenarios, which specifically adopts the following technical solutions:

[0004] A method for quantifying cost assessment of thermal power units in multiple scenarios, characterized by comprising the following steps:

[0005] Acquiring operating parameters of the thermal power unit; the operating parameters at least include operating condition parameters and unit performance parameters;

[0006] Different operation scenarios are divided based on the operation parameters of the thermal power unit; the operation scenarios of the thermal power unit at least include conventional operation scenarios, deep peak load regulation scenarios and rapid load change scenarios;

[0007] Based on different operation scenarios of thermal power units, typical operating conditions under corresponding operation scenarios are selected respectively;

[0008] Based on different typical operating conditions under different operating scenarios, different operating costs of the thermal power units are calculated respectively, and the total cost is calculated according to the different operating costs of the thermal power units; the operating cost of the thermal power units at least includes operating coal consumption cost, pollutant emission cost, life loss cost and solid waste treatment cost;

[0009] Based on the total cost comparison of different typical operating conditions under different operating scenarios, the cost differences under each typical operating condition are analyzed.

[0010] Optionally, the step of dividing different operation scenarios based on the operation parameters of the thermal power unit includes:

[0011] Based on the operating parameters and performance parameters of thermal power units, the P e The operating condition is the normal operating scenario;

[0012] Based on the operating parameters and performance parameters of thermal power units, the classification is between 30% and 50% P e The operating condition is a deep peak load regulation scenario;

[0013] Based on the operating parameters and performance parameters of thermal power units, the classification is at 0.5%P e The load change rate above MW / min is a rapid load change scenario.

[0014] Optionally, the step of selecting typical operating conditions under corresponding operating scenarios based on different operating scenarios of the thermal power unit includes:

[0015] Based on the conventional operation scenario, the power of thermal power units is selected at 70%P e , 80%P e and 90%P e Three operating conditions are used as typical conditions for normal operating scenarios;

[0016] Based on the deep peak load scenario, the power of thermal power units is selected at 30%P e 、35%P e and 40%P e Three operating conditions are used as typical conditions for deep peak load regulation scenarios;

[0017] Based on the rapid load change scenario, the load change rate of the thermal power unit is selected to be 0.5%P e , 1%P e and 1.25%P e Three operating conditions are used as typical conditions for fast load change scenarios.

[0018] Optional: The steps of calculating the operating coal consumption cost of a thermal power unit based on different typical operating conditions under different operating scenarios include:

[0019] First, based on the calorific value conversion calculation, the standard coal consumption rate of thermal power units under different working conditions is obtained:

[0020]

[0021] Then, based on the standard coal consumption rate under different working conditions, the standard coal consumption rate of the thermal power unit under variable load conditions is obtained:

[0022] f(P)=aP 2 +bP+c;

[0023] Based on the standard coal consumption rate under different working conditions, the operating coal consumption cost under the corresponding working conditions is calculated:

[0024] C coal =f(P)×S coal ×10 -6 ;

[0025] Where f(P) is the standard coal consumption rate of the thermal power unit, in g / (KW·h); w coal is the coal consumption of the thermal power unit, in t / h; P is the power generation of the thermal power unit, in MW; x is the calorific value of coal, in kcal / kg; S coal is the unit coal price, in yuan / t; C coal is the coal consumption cost, in units of RMB / (KW·h); a, b, c are the performance characteristic coefficients of the coal consumption of the generating set.

[0026] Optional: The steps of calculating the pollutant emission cost of a thermal power unit based on different typical operating conditions under different operating scenarios include:

[0027] Firstly, the gas emission flow rate, unit power generation and corresponding pollutant emissions of the thermal power unit under standard conditions are obtained;

[0028] Then, based on the gas emission flow, unit power generation and the emission of corresponding pollutants, the emission of corresponding pollutants in the thermal power unit under the condition of unit power generation is calculated, that is, the emission factor of the corresponding pollutant:

[0029]

[0030] Then the emission of corresponding pollutants under variable load conditions of thermal power units under unit power generation conditions is fitted as follows:

[0031] H δ (P) = a δ P 3 +b δ P 2 +c δ P+d δ ;

[0032] Then, the chemical molecular weight ratio of the absorbent to the pollutant is obtained according to the principle of pollutant absorption reaction, and the pollutant emission cost is calculated based on the chemical molecular weight ratio of the absorbent to the pollutant:

[0033] C δ =S 吸 (P)×S 吸 ×10 -6 ;

[0034] Among them, H δ (P) is the emission factor of pollutant δ, in g / (KW·h); I δ is the emission of pollutant δ, in mg / m 3 ;Q s Is the gas discharge flow rate under standard conditions, in m 3 / h; P is the generating power of the unit, in MW; a δ 、b δ 、c δ ,d δ are the performance characteristic coefficients of pollutant δ emissions of thermal power units; S 吸 (P) is the amount of absorbent used under unit power generation conditions; S 吸 is the unit price of the absorbent, in yuan / t; C δ is the emission cost of pollutant δ, in units of g / (KW·h); wherein δ is the type of pollutant, and the types of pollutants include nitrogen oxides and sulfur dioxide.

[0035] Optional: When calculating the emission cost of nitrogen oxides, ammonia is selected as the absorbent based on the selective catalytic reduction denitrification technology. The amount of ammonia used per unit of power generation is calculated as:

[0036]

[0037] in is the amount of ammonia used per unit of power generation; is the emission factor of nitrogen oxides.

[0038] Optional: When calculating the emission cost of sulfur dioxide, calcium carbonate is selected as the absorbent based on the lime / limestone-gypsum wet desulfurization process. The amount of calcium carbonate used per unit of power generation is calculated as:

[0039]

[0040] in is the amount of calcium carbonate used per unit of power generation; is the emission factor for sulfur dioxide.

[0041] Optional: The steps of calculating the life loss cost of a thermal power unit based on different typical operating conditions under different operating scenarios include:

[0042] First, the linear cumulative damage method is used to calculate the corresponding life loss rate of each component M of the thermal power unit under different typical operating conditions in different operating scenarios:

[0043]

[0044] Where D M is the life loss rate of component M; N i is the actual number of cycles under the cyclic stress i; N fi is the number of material failure cycles under cyclic stress i; t i is the actual operating time under cyclic stress i; t ri The reference operating time under cyclic stress i; D is the total life damage value;

[0045] Then, a maximum value or an average value is calculated based on the life loss rate of each part;

[0046] The unit cost caused by life loss is calculated based on the maximum or average value:

[0047] C t =D α ×C J ;

[0048] The unit cost calculation based on the life loss is used to obtain the life loss cost under variable load conditions:

[0049]

[0050] Among them C t D is the unit cost caused by life loss at time t; α is the maximum or average value of the life loss rate of each part at time t; C J is the total cost of the unit; P t is the unit load at time t; P0 is the unit load at the initial time; P e For rated load.

[0051] Optional: The steps of calculating the solid waste treatment cost of a thermal power unit based on different typical operating conditions under different operating scenarios include:

[0052] Obtaining the components and mass proportions of solid waste generated by thermal power units under different typical operating conditions in different operating scenarios; wherein the components of the solid waste generated by the thermal power units include at least coal cinders, fly ash and desulfurized gypsum;

[0053] Obtain the emission of corresponding components according to the components of solid waste and their corresponding mass proportions;

[0054] Calculate the corresponding solid waste treatment cost based on the emission of each component in solid waste:

[0055] C waste =W zha S zha +W hui S hui +W liu S liu ;

[0056] Among them C waste is the solid waste treatment cost under different typical working conditions in different operation scenarios; W zha is the emission of coal ash; W hui is the emission of fly ash; W liu is the emission of desulfurized gypsum; S zha is the unit processing cost of coal slag; S hui is the unit processing cost of fly ash; S liu is the unit processing cost of desulfurized gypsum.

[0057] Furthermore, the present application also discloses a device for quantifying the cost assessment of thermal power units in multiple scenarios, the device comprising:

[0058] A parameter acquisition module is used to acquire the operating parameters of the thermal power unit; the operating parameters at least include operating condition parameters and unit performance parameters;

[0059] A scenario division module, used to divide different operation scenarios based on the operation parameters of the thermal power unit; the operation scenarios of the thermal power unit at least include conventional operation scenarios, deep peak load regulation scenarios and rapid load change scenarios;

[0060] The operating condition selection module is used to select typical operating conditions under the corresponding operating scenarios based on different operating scenarios of the thermal power unit;

[0061] A cost calculation module, for calculating different operating costs of thermal power units based on different typical operating conditions under different operating scenarios, and obtaining a total cost based on the different operating costs of the thermal power units; the operating cost of the thermal power units at least includes operating coal consumption cost, pollutant emission cost, life loss cost and solid waste treatment cost;

[0062] The cost comparison module is used to compare and analyze the cost differences under each typical working condition based on the total cost of different typical working conditions under different operating scenarios.

[0063] Beneficial Effects

[0064] The technical solution of this application has the following beneficial effects:

[0065] The quantitative cost assessment method for thermal power units under multiple scenarios of the present application can calculate explicit costs (such as fuel consumption costs) and implicit costs (such as pollutant emission costs, life loss costs and solid waste costs) according to the operating status and energy consumption characteristics of the thermal power units after flexibility transformation in combination with three scenarios: conventional operation, deep peak regulation and rapid load change, so as to solve the problem of single scenario and incomplete cost composition when calculating the cost of existing thermal power units, resulting in inaccurate calculation results. The method of the present application analyzes the explicit cost and implicit cost composition under different operating scenarios, and calculates the total cost under the corresponding scenarios respectively, thereby improving the accuracy of the calculation results and making the evaluation results more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 Schematic diagram of the process of quantifying the cost assessment of thermal power units in multiple scenarios in an embodiment of the present application.

[0067] Figure 2 It is a structural schematic diagram of a device for quantifying cost assessment of thermal power units in multiple scenarios in an embodiment of the present application.

[0068] Figure 3 This is a structural diagram of an electronic device in an embodiment of the present application. DETAILED DESCRIPTION

[0069] The present application is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and cannot be used to limit the scope of protection of the present application. It should be noted that the following detailed descriptions are all exemplary and are intended to provide further explanation of the present application.

[0070] Combination Figure 1 As shown, the embodiment of the present application specifically discloses a method for quantifying the cost assessment of thermal power units in multiple scenarios, which is characterized by comprising the following steps:

[0071] Step S1: obtaining the operating parameters of the thermal power unit; the operating parameters at least include operating condition parameters and unit performance parameters;

[0072] Step S2: different operation scenarios are divided based on the operation parameters of the thermal power unit; the operation scenarios of the thermal power unit at least include a conventional operation scenario, a deep peak load regulation scenario and a rapid load change scenario;

[0073] Step S3: based on different operation scenarios of the thermal power unit, typical operating conditions under corresponding operation scenarios are selected respectively;

[0074] Step S4: Calculate different operating costs of the thermal power unit based on different typical operating conditions under different operating scenarios, and calculate the total cost according to the different operating costs of the thermal power unit; the operating cost of the thermal power unit at least includes operating coal consumption cost, pollutant emission cost, life loss cost and solid waste treatment cost;

[0075] Step S5: Compare and analyze the cost differences under each typical operating condition based on the total cost of different typical operating conditions under different operating scenarios.

[0076] The step S2 described in the present application can be divided into three different operation scenarios based on the operation parameters of the thermal power unit, and the specific steps include:

[0077] (1) Based on the operating parameters and performance parameters of thermal power units, it can be divided into 70% to 100% P e The operating condition is the normal operating scenario; e is the rated load of the thermal power unit.

[0078] (2) Based on the operating parameters and performance parameters of thermal power units, the power generation units can be divided into 30% to 50% P e The operating condition is a deep peak load regulation scenario;

[0079] (3) Based on the operating parameters and performance parameters of thermal power units, the 0.5% P e The load change rate above MW / min is a rapid load change scenario.

[0080] It should be noted that the flexibility of thermal power units is mainly reflected in two aspects: "depth" and "speed". First, "depth" means that thermal power units have a wider load adjustment range, and their load lower limit can be adjusted down to 30% of the rated load, which is a deep peak load regulation scenario; "speed" means that thermal power units have a faster load change rate, higher load adjustment accuracy and better primary frequency regulation performance, which is a fast load change scenario.

[0081] Furthermore, in step S3, typical operating conditions under corresponding operating scenarios are respectively selected based on different operating scenarios of the thermal power unit, and the specific steps include:

[0082] (1) Based on the conventional operation scenario, the power of the thermal power unit is selected at 70%P e , 80%P e and 90%P e Three operating conditions are used as typical conditions for normal operating scenarios;

[0083] (2) Based on the deep peak load scenario, the power of thermal power units is selected at 30%P e 、35%P e and 40%P e Three operating conditions are used as typical conditions for deep peak load regulation scenarios;

[0084] (3) Based on the rapid load change scenario, the load change rate of the thermal power unit is selected to be 0.5%P e , 1%P e and 1.25%P e Three operating conditions are used as typical conditions for fast load change scenarios.

[0085] Specifically, in step S4, the operating coal consumption cost of the thermal power unit can be calculated based on different typical operating conditions under different operating scenarios, and the specific steps include:

[0086] First, the operating coal consumption cost of thermal power units is usually calculated using consumption characteristics. Based on the calorific value conversion calculation, the standard coal consumption rate of thermal power units under different operating conditions can be obtained:

[0087]

[0088] Then, based on the standard coal consumption rate under different working conditions, the standard coal consumption rate of the thermal power unit under variable load conditions is obtained:

[0089] f(P)=aP 2 +bP+c;

[0090] Based on the standard coal consumption rate under different working conditions, the operating coal consumption cost under the corresponding working conditions is calculated:

[0091] C coal =f(P)×S coal ×10 -6 ;

[0092] Where f(P) is the standard coal consumption rate of the thermal power unit, in g / (KW·h); w coal is the coal consumption of the thermal power unit, in t / h; P is the power generation of the thermal power unit, in MW; x is the calorific value of coal, in kcal / kg; S coal is the unit coal price, in yuan / t; C coalis the coal consumption cost, in units of RMB / (KW·h); a, b, c are the performance characteristic coefficients of the coal consumption of the generating set.

[0093] Furthermore, the power industry accounts for a relatively high proportion of coal consumption and the emission of pollutants into the atmosphere. x The emission of SO2) is also a focus of attention, so the material cost of environmental protection equipment desulfurization and denitrification has also increased significantly. In step 4, the pollutant emission cost of the thermal power unit can be calculated based on different typical operating conditions under different operating scenarios, and the specific steps include:

[0094] Firstly, the gas emission flow rate, unit power generation and corresponding pollutant emissions of the thermal power unit under standard conditions are obtained;

[0095] Then, based on the gas emission flow, unit power generation and the emission of corresponding pollutants, the emission of corresponding pollutants in the thermal power unit under the condition of unit power generation is calculated, that is, the emission factor of the corresponding pollutant:

[0096]

[0097] Then the emission of corresponding pollutants under variable load conditions of thermal power units under unit power generation conditions is fitted as follows:

[0098] H δ (P) = a δ P 3 +b δ P 2 +c δ P+d δ ;

[0099] Then, the chemical molecular weight ratio of the absorbent to the pollutant is obtained according to the principle of pollutant absorption reaction, and the pollutant emission cost is calculated based on the chemical molecular weight ratio of the absorbent to the pollutant:

[0100] C δ =S 吸 (P)×S 吸 ×10 -6 ;

[0101] Among them, H δ (P) is the emission factor of pollutant δ, in g / (KW·h); I δ is the emission of pollutant δ, in mg / m 3 ;Q s Is the gas discharge flow rate under standard conditions, in m 3 / h; P is the generating power of the unit, in MW; a δ , b δ 、cδ ,d δ are the performance characteristic coefficients of pollutant δ emissions of thermal power units; S 吸 (P) is the amount of absorbent used under unit power generation conditions; S 吸 is the unit price of the absorbent, in yuan / t; C δ is the emission cost of pollutant δ, in units of g / (KW·h); wherein δ is the type of pollutant, and the types of pollutants include nitrogen oxides and sulfur dioxide.

[0102] Furthermore, among the denitration methods used in coal-fired power plants in my country, the more mature technology is SCR denitration. Under the action of a catalyst, by adding a reducing agent (NH3), nitrogen oxides (NO x ) is reduced to pollution-free nitrogen (N2) and water (H2O). According to experience, the main component of flue gas is NO2. According to the reaction equation in the denitrification process, it can be concluded that 1 mole of NH3 is required to remove 1 mole of NO2. Suppose the amount of NH3 required is

[0103]

[0104] When calculating the emission cost of nitrogen oxides in this application, ammonia is selected as the absorbent based on the selective catalytic reduction denitrification technology, and the amount of ammonia used per unit power generation is calculated as follows:

[0105]

[0106] in is the amount of ammonia used per unit of power generation; is the emission factor of nitrogen oxides.

[0107] Furthermore, the desulfurization method used in coal-fired power plants in my country is mainly the traditional lime / limestone-gypsum wet desulfurization process, which uses calcium oxide or calcium carbonate as an absorbent and water to make a slurry, washes the flue gas in the absorption tower and absorbs it. According to the reaction equation in the desulfurization process, it can be concluded that 1 mole of CaCO3 is required to remove 1 mole of SO2. Assume that the amount of CaCO3 required is

[0108]

[0109] When calculating the emission cost of sulfur dioxide in this application, calcium carbonate is selected as the absorbent based on the lime / limestone-gypsum wet desulfurization process. The amount of calcium carbonate used per unit power generation is calculated as follows:

[0110]

[0111] in is the amount of calcium carbonate used per unit of power generation; is the emission factor for sulfur dioxide.

[0112] Furthermore, the present application can determine the total pollutant emission cost based on the two pollutants of nitrogen oxides and sulfur dioxide:

[0113]

[0114] Among them C env is the total cost of pollutant emissions from thermal power units, yuan / (kw.h); is the emission cost of nitrogen oxides, in g / (KW·h); It is the emission cost of sulfur dioxide, and its unit is g / (KW·h).

[0115] In addition, when the thermal power unit in this application is operated flexibly (for example, in deep peak regulation and rapid load change scenarios), the thermal stress of the rotor shaft system of the thermal power unit is greatly increased due to the deep reduction of the output of the thermal power unit. The excessive alternating thermal stress will cause low-cycle fatigue and creep loss of key components of the system, affecting the service life of the unit. Therefore, this application is based on the quantitative calculation method of life loss-unit cost, and the unit cost increment caused by life loss is converted into a function related to the unit load through linear representation.

[0116] Specifically, in step S4, the life loss cost of the thermal power unit can be calculated based on different typical operating conditions under different operating scenarios, and the specific steps include:

[0117] First, the linear cumulative damage method is used to calculate the corresponding life loss rate of each component M of the thermal power unit under different typical operating conditions in different operating scenarios:

[0118]

[0119] Where D M is the life loss rate of component M; N i is the actual number of cycles under the cyclic stress i; N fi is the number of material failure cycles under cyclic stress i; t i is the actual operating time under cyclic stress i; t ri The reference operating time under cyclic stress i; D is the total life damage value; n is the number of cyclic stresses.

[0120] Then, a maximum value or an average value is calculated based on the life loss rate of each part;

[0121] The unit cost caused by life loss is calculated based on the maximum or average value:

[0122] Ct =D α ×C J ;

[0123] For example, D1, D2...D M are the life loss rates of the final outlet and final re-export headers, water-cooled walls, rotors, etc., respectively. J Quantify the cost of life loss for the total unit cost:

[0124] Aggressive estimate: C t =Max(D1,D2...D n )×C J ;

[0125] Conservative estimate: C t =Mean(D1,D2...D n )×C J ;

[0126] Finally, based on the unit cost calculation caused by life loss, the life loss cost under variable load conditions is obtained:

[0127]

[0128] Among them C t D is the unit cost caused by life loss at time t; α is the maximum or average value of the life loss rate of each part at time t; C J is the total cost of the unit; P t is the unit load at time t; P0 is the unit load at the initial time; P e For rated load.

[0129] Furthermore, after the flexibility transformation of the thermal power unit in step S4 of this application, the coal consumption increases, and the solid waste generated by coal combustion will also increase. The main solid waste products of coal-fired thermal power generators are coal slag (accounting for about 18%), fly ash (accounting for about 20%) and desulfurized gypsum (accounting for about 4%). If these solid wastes are not treated and directly discharged, they will cause serious environmental problems, but the treatment process will also increase costs.

[0130] Specifically, the step S4 may include calculating the solid waste treatment cost of the thermal power unit based on different typical operating conditions under different operating scenarios:

[0131] Obtaining the components and mass proportions of solid waste generated by thermal power units under different typical operating conditions in different operating scenarios; wherein the components of the solid waste generated by the thermal power units include at least coal cinders, fly ash and desulfurized gypsum;

[0132] Obtain the emission of corresponding components according to the components of solid waste and their corresponding mass proportions;

[0133] Calculate the corresponding solid waste treatment cost based on the emission of each component in solid waste:

[0134] C waste =W zha S zha +W hui S hui +W liu S liu ;

[0135] Among them C waste is the solid waste treatment cost under different typical working conditions in different operation scenarios; W zha is the emission of coal ash; W hui is the emission of fly ash; W liu is the emission of desulfurized gypsum; S zha is the unit processing cost of coal slag; S hui is the unit processing cost of fly ash; S liu is the unit processing cost of desulfurized gypsum.

[0136] Finally, in step S4, the total cost can be calculated based on the coal consumption cost, pollutant emission cost, life loss cost and solid waste treatment cost of the thermal power unit:

[0137] C J =C coal +C env +C life +C waste ;

[0138] Among them C J is the total unit cost.

[0139] The embodiment of the present application selects a 600MW thermal power unit, takes 10 days of data, takes 600 groups of data every day, and obtains a total of 6000 groups of data.

[0140] The operating data of thermal power units are divided into three operating scenarios, and the more typical operating conditions of each are selected for cost calculation.

[0141] (1) Normal operation

[0142] Table 1 Power thresholds for different operating conditions under normal operation scenarios

[0143] Normal operation 70％ 80％ 90％ Unit load (MW) 420 480 540

[0144] Combined with the data in Table 1, the cost of thermal power units under normal operation is calculated according to the cost evaluation quantification method of thermal power units in this application:

[0145] Table 2 Cost of thermal power units under normal operation

[0146]

[0147] (2) Deep peak load regulation

[0148] Table 3 Power thresholds for different working conditions under deep peak load regulation scenarios

[0149] Deep peak shaving 30％ 35％ 40％ Unit load (MW) 180 210 240

[0150] Combined with the data in Table 3, the cost of thermal power units under deep peak regulation is calculated according to the cost evaluation quantification method of thermal power units in this application:

[0151] Table 4 Cost of thermal power units under deep peak load regulation scenario

[0152]

[0153] (3) Rapid load change

[0154] According to data analysis, the maximum load change rate is 7.5MW / min, which is 1.25%P e MW / min.

[0155] Table 5 Rate thresholds for different working conditions under fast load change scenarios

[0156] Rapid load changes 0.5％ 1％ 1.25％ Load change rate (MW / min) 3 6 7.5

[0157] Combined with the data in Table 5, the cost of thermal power units under deep peak regulation is calculated according to the cost evaluation quantification method of thermal power units in this application:

[0158] Table 6 Cost of thermal power units under rapid load change scenario

[0159]

[0160] According to the above data analysis, when thermal power units are transformed for flexibility, when the thermal power units are in low-load operation, the coal-fired power cost increases, pollutant emissions increase, solid waste increases, and the total cost increases. When the thermal power units are in variable load, the cost will also increase when the load change rate is slightly slower or faster.

[0161] Further, combined with Figure 2 As shown, the present application also discloses a device for quantifying the cost assessment of thermal power units in multiple scenarios, the device comprising:

[0162] A parameter acquisition module is used to acquire the operating parameters of the thermal power unit; the operating parameters at least include operating condition parameters and unit performance parameters;

[0163] A scenario division module, used to divide different operation scenarios based on the operation parameters of the thermal power unit; the operation scenarios of the thermal power unit at least include conventional operation scenarios, deep peak load regulation scenarios and rapid load change scenarios;

[0164] The operating condition selection module is used to select typical operating conditions under the corresponding operating scenarios based on different operating scenarios of the thermal power unit;

[0165] A cost calculation module, for calculating different operating costs of thermal power units based on different typical operating conditions under different operating scenarios, and obtaining a total cost based on the different operating costs of the thermal power units; the operating cost of the thermal power units at least includes operating coal consumption cost, pollutant emission cost, life loss cost and solid waste treatment cost;

[0166] The cost comparison module is used to compare and analyze the cost differences under each typical working condition based on the total cost of different typical working conditions under different operating scenarios.

[0167] The device provided in the embodiment of the present application can achieve Figure 1 To avoid repetition, the various processes implemented by the method embodiment will not be described again here.

[0168] like Figure 3 As shown, the embodiment of the present application also provides an electronic device, including a processor 701, a memory 702 and a bus 703, wherein the processor 701 and the memory 702 communicate with each other through the bus 703; and a program or instruction stored in the memory 702 and executable on the processor 701, which is executed by the processor 701 to implement the following Figure 1 The various processes of the method embodiment shown in the figure can achieve the same technical effect. To avoid repetition, they will not be described again here.

[0169] The embodiment of the present application also provides a readable storage medium on which a program or instruction is stored. When the program or instruction is executed by a processor, the above Figure 1 The various processes of the method embodiments described above can achieve the same technical effect, and will not be described again here to avoid repetition.

[0170] The present application also provides a computer program product, including computer instructions, which, when executed by a processor, implement the above Figure 1 The various processes of the method embodiments described above can achieve the same technical effect, and will not be described again here to avoid repetition.

[0171] It should be understood that "one embodiment" or "an embodiment" mentioned throughout the specification means that specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. The above-mentioned sequence numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments.

[0172] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0173] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as: multiple units or components can be combined, or can be integrated into another device, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0174] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units; they may be located in one place or distributed on multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0175] In addition, all functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may be a separate unit, or two or more units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0176] A person skilled in the art can understand that all or part of the steps of implementing the above method embodiment can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above method embodiment; and the aforementioned storage medium includes: mobile storage devices, read-only memories (ROM), magnetic disks or optical disks, etc., various media that can store program codes.

[0177] Alternatively, if the above-mentioned integrated unit of the present application is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application can essentially or in other words, the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a device (which can be a terminal or a platform, etc.) to execute all or part of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROMs, magnetic disks, or optical disks.

[0178] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A method for quantifying the cost assessment of thermal power units in multiple scenarios, characterized in that: The steps include: Acquiring operating parameters of the thermal power unit; the operating parameters at least include operating condition parameters and unit performance parameters; Different operation scenarios are divided based on the operation parameters of the thermal power unit; the operation scenarios of the thermal power unit at least include conventional operation scenarios, deep peak load regulation scenarios and rapid load change scenarios; Based on different operation scenarios of thermal power units, typical operating conditions under corresponding operation scenarios are selected respectively; Based on different typical operating conditions under different operating scenarios, different operating costs of the thermal power units are calculated respectively, and the total cost is calculated according to the different operating costs of the thermal power units; the operating cost of the thermal power units at least includes operating coal consumption cost, pollutant emission cost, life loss cost and solid waste treatment cost; Based on the total cost comparison of different typical operating conditions under different operating scenarios, the cost differences under each typical operating condition are analyzed.

2. The method for quantifying the cost assessment of thermal power units under multiple scenarios according to claim 1 is characterized in that: The step of dividing different operation scenarios based on the operation parameters of the thermal power unit includes: Based on the operating parameters and performance parameters of thermal power units, the P e The operating condition is the normal operating scenario; Based on the operating parameters and performance parameters of thermal power units, the classification is between 30% and 50% P e The operating condition is a deep peak load regulation scenario; Based on the operating parameters and performance parameters of thermal power units, the classification is at 0.5%P e The load change rate above MW / min is a rapid load change scenario.

3. The method for quantifying the cost assessment of thermal power units under multiple scenarios according to claim 2 is characterized in that: The steps of selecting typical operating conditions under corresponding operating scenarios based on different operating scenarios of the thermal power unit include: Based on the conventional operation scenario, the power of thermal power units is selected at 70%P e 、80%P e and 90%P e Three operating conditions are used as typical conditions for normal operating scenarios; Based on the deep peak load scenario, the power of thermal power units is selected at 30%P e 、35%P e and 40%P e Three operating conditions are used as typical conditions for deep peak load regulation scenarios; Based on the rapid load change scenario, the load change rate of the thermal power unit is selected to be 0.5%P e , 1%P e and 1.25%P e Three operating conditions are used as typical conditions for fast load change scenarios.

4. The method for quantifying the cost assessment of thermal power units in multiple scenarios according to claim 3 is characterized in that: The steps for calculating the operating coal consumption cost of thermal power units based on different typical operating conditions under different operating scenarios include: First, based on the calorific value conversion calculation, the standard coal consumption rate of thermal power units under different working conditions is obtained: Then, based on the standard coal consumption rate under different working conditions, the standard coal consumption rate of the thermal power unit under variable load conditions is obtained: f(P)=aP 2 +bP+c; Based on the standard coal consumption rate under different working conditions, the operating coal consumption cost under the corresponding working conditions is calculated: C coal =f(P)×S coal ×10 -6 ; Where f(P) is the standard coal consumption rate of the thermal power unit, in g / (KW·h); w coal is the coal consumption of the thermal power unit, in t / h; P is the power generation of the thermal power unit, in MW; x is the calorific value of coal, in kcal / kg; S coal is the unit coal price, in yuan / t; C coal is the coal consumption cost, in units of RMB / (KW·h); a, b, c are the performance characteristic coefficients of the coal consumption of the generating set.

5. The method for quantifying the cost assessment of thermal power units under multiple scenarios according to claim 1 is characterized in that: The steps for calculating the pollutant emission costs of thermal power units based on different typical operating conditions under different operating scenarios include: Firstly, the gas emission flow rate, unit power generation and corresponding pollutant emissions of the thermal power unit under standard conditions are obtained; Then, based on the gas emission flow, unit power generation and the emission of corresponding pollutants, the emission of corresponding pollutants in the thermal power unit under the condition of unit power generation is calculated, that is, the emission factor of the corresponding pollutant: Then the emission of corresponding pollutants under variable load conditions of thermal power units under unit power generation conditions is fitted as follows: H δ (P)=a δ P 3 +b δ P 2 +c δ P+d δ ; Then, the chemical molecular weight ratio of the absorbent to the pollutant is obtained according to the principle of pollutant absorption reaction, and the pollutant emission cost is calculated based on the chemical molecular weight ratio of the absorbent to the pollutant: C δ =S 吸 (P)×S 吸 ×10 -6 ; Among them, H δ (P) is the emission factor of pollutant δ, in g / (KW·h); I δ is the emission of pollutant δ, in mg / m 3 ;Q s Is the gas discharge flow rate under standard conditions, in m 3 / h; P is the generating power of the unit, in MW; a δ 、b δ 、c δ ,d δ are the performance characteristic coefficients of the pollutant δ emissions of thermal power units; S 吸 (P) is the amount of absorbent used under unit power generation conditions; S 吸 is the unit price of the absorbent, in yuan / t; C δ is the emission cost of pollutant δ, in units of g / (KW·h); wherein δ is the type of pollutant, and the types of pollutants include nitrogen oxides and sulfur dioxide.

6. The method for quantifying the cost assessment of thermal power units under multiple scenarios according to claim 5 is characterized in that: When calculating the emission cost of nitrogen oxides, ammonia is selected as the absorbent based on the selective catalytic reduction denitrification technology. The amount of ammonia used per unit of power generation is calculated as: S NH3 (P)=(17 / 46)×H NOx (P)=0.3696H NOx (P); Where S NH3 (P) is the amount of ammonia used under unit power generation conditions; H NOx (P) is the emission factor of nitrogen oxides.

7. The method for quantifying the cost assessment of thermal power units under multiple scenarios according to claim 5 is characterized in that: When calculating the emission cost of sulfur dioxide, calcium carbonate is selected as the absorbent based on the lime / limestone-gypsum wet desulfurization process. The amount of calcium carbonate used per unit of power generation is calculated as follows: S CaCO3 (P)=(100 / 64)×H SO2 (P)=1.5625H SO2 (P); Where S C a CO3 (P) is the amount of calcium carbonate used per unit power generation; H SO2 (P) is the emission factor of sulfur dioxide.

8. The method for quantifying the cost assessment of thermal power units under multiple scenarios according to claim 1 is characterized in that: The steps for calculating the life loss cost of thermal power units based on different typical operating conditions under different operating scenarios include: First, the linear cumulative damage method is used to calculate the corresponding life loss rate of each component M of the thermal power unit under different typical operating conditions in different operating scenarios: Where D M is the life loss rate of component M; N i is the actual number of cycles under the cyclic stress i; N fi is the number of material failure cycles under cyclic stress i; t i is the actual operating time under cyclic stress i; t ri The reference operating time under cyclic stress i; D is the total life damage value; Then, a maximum value or an average value is calculated based on the life loss rate of each part; The unit cost caused by life loss is calculated based on the maximum or average value: C t =D α ×C J ; The unit cost calculation based on the life loss is used to obtain the life loss cost under variable load conditions: Among them C t D is the unit cost caused by life loss at time t; α is the maximum or average value of the life loss rate of each part at time t; C J is the total cost of the unit; P t is the unit load at time t; P0 is the unit load at the initial time; P e For rated load.

9. The method for quantifying the cost assessment of thermal power units under multiple scenarios according to claim 1 is characterized in that: The steps for calculating the solid waste treatment cost of thermal power units based on different typical operating conditions under different operating scenarios include: Obtaining the components and mass proportions of solid waste generated by thermal power units under different typical operating conditions in different operating scenarios; wherein the components of the solid waste generated by the thermal power units include at least coal cinders, fly ash and desulfurized gypsum; Obtain the emission of corresponding components according to the components of solid waste and their corresponding mass proportions; Calculate the corresponding solid waste treatment cost based on the emission of each component in solid waste: C waste =W zha S zha +W hui S hui +W liu S liu ; Among them C wastei,j is the solid waste treatment cost under different typical working conditions in different operation scenarios; W zha is the emission of coal ash; W hui is the emission of fly ash; W liu is the emission of desulfurized gypsum; S zha is the unit processing cost of coal slag; S hui is the unit processing cost of fly ash; S liu is the unit processing cost of desulfurized gypsum.

10. A device for quantifying the cost assessment of thermal power units in multiple scenarios, characterized in that: The device comprises: A parameter acquisition module is used to acquire the operating parameters of the thermal power unit; the operating parameters at least include operating condition parameters and unit performance parameters; A scenario division module, used to divide different operation scenarios based on the operation parameters of the thermal power unit; the operation scenarios of the thermal power unit at least include conventional operation scenarios, deep peak load regulation scenarios and rapid load change scenarios; The operating condition selection module is used to select typical operating conditions under the corresponding operating scenarios based on different operating scenarios of the thermal power unit; A cost calculation module, for calculating different operating costs of thermal power units based on different typical operating conditions under different operating scenarios, and obtaining a total cost based on the different operating costs of the thermal power units; the operating cost of the thermal power units at least includes operating coal consumption cost, pollutant emission cost, life loss cost and solid waste treatment cost; The cost comparison module is used to compare and analyze the cost differences under each typical working condition based on the total cost of different typical working conditions under different operating scenarios.

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