Heat and power load optimization method for combined heat and power generation heat supply unit

Abstract

The invention relates to the technical field of heat supply unit thermoelectric load optimization, and discloses a combined heat and power generation heat supply unit thermoelectric load optimization method, which is characterized in that actual distribution of thermoelectric loads is carried out based on a combined heat and power generation actual energy consumption equation, modeling is carried out for analysis, analysis is carried out according to an instance result, and distribution optimization of the thermoelectric loads is continuously carried out. And the thermoelectric load optimization method with the lowest cost is obtained. According to the thermoelectric load optimization method for the cogeneration heat supply unit, specific data of the heat supply unit are collected, calculation is performed according to specific data produced by a thermal power plant, a numerical value obtained through calculation is modeled, energy consumption of cogeneration is analyzed, and finally an energy consumption equation is obtained; the heat supply unit is subjected to heat and power load optimization by utilizing the energy consumption equation, so that energy waste caused by average distribution of the heat and power load is avoided, and the energy utilization rate of the cogeneration heat supply unit is improved.

Description

Technical Field

[0001] The invention relates to the technical field of thermal power load optimization of a heating unit, and in particular to a thermal power load optimization method for a cogeneration heating unit. Background Art

[0002] Combined heat and power, also known as combined heat and power, abbreviated as CHP, is a system that can provide both heat and electricity. Since cogeneration units have the ability to save energy and have a high utilization rate, they are widely used in thermal power plants. In order to reduce energy consumption and pollutant emissions, it is necessary to optimize the heat and power compliance of the cogeneration heating units.

[0003] In the prior art, when optimizing the thermal power load of a heating unit, the thermal power load of the heating unit is usually distributed by an average distribution method. However, in actual use, the utilization rate of the average distribution method is not high, and the thermal power loads of different heating units are inconsistent. The average distribution of the thermal power load will cause some heating units to fail to achieve utilization, and some power supply units to exceed the load, resulting in energy waste. Therefore, it is necessary to invent a method for optimizing the thermal power load of a cogeneration heating unit to solve the above problems. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a method for optimizing the thermal power load of a cogeneration heating unit, by collecting specific data of the heating unit, calculating according to the specific data produced by the thermal power plant, modeling the calculated values, and analyzing the energy consumption of the cogeneration, and finally obtaining an energy consumption equation. The energy consumption equation is used to optimize the thermal power load of the heating unit, thereby avoiding energy waste caused by evenly distributing the thermal power load and improving the energy utilization rate of the cogeneration heating unit. At the same time, an analysis is performed based on the actual average coal consumption of the thermal power plant, and the power generation efficiency and the power generation heat rate are calculated. Factors that can affect the energy consumption are applied to the analysis, and are allocated one by one according to the actual adaptability of the unit, thereby improving the accuracy of the optimization method.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned thermal power load optimization of the heating unit, the present invention provides the following technical solution: a thermal power load optimization method for a cogeneration heating unit, comprising the following steps:

[0008] S1. Unit data collection

[0009] The types and quantities of heating units that need to be optimized for thermal power load and the production data of thermal power plants are collected, statistically processed, and their power, energy consumption and other data are calculated and finally summarized into a table.

[0010] S2. Calculation of thermal power plant production data

[0011] Based on the collected data from the thermal power plants, calculations are performed to obtain the thermal power plant utilization efficiency, power generation rate, and coal consumption rate, and the data results are summarized.

[0012] S3. Modeling of multiple heating units

[0013] The calculated data results are constructed into a table in the form of a tree diagram, and the continuous changes are marked with wavy lines for comparison.

[0014] S4. Analysis of energy consumption of combined heat and power

[0015] According to the tree diagram, the indicators of the thermal process of the cogeneration unit are analyzed and calculated, and the factors that affect the energy consumption of the energy generated in the cogeneration process of the heating unit are analyzed to obtain the actual energy consumption equation of cogeneration.

[0016] S5. Thermal power load optimization

[0017] The actual distribution of thermal power load is carried out based on the actual energy consumption equation of cogeneration, and modeling is carried out for analysis. According to the example results, the distribution of thermal power load is continuously optimized until the thermal power load optimization method with the lowest cost is obtained.

[0018] Preferably, in step S1, the production power of the thermal power plant is calculated as follows:

[0019] B i =D i T i 2 +e i T i +f i ,i.

[0020] The energy consumption calculation formula of thermal power plant is:

[0021]

[0022] Preferably, in step S2, the calculation formula for the fuel utilization efficiency of the thermal power plant is:

[0023]

[0024] The calculation formula for the power generation efficiency of a thermal power plant is:

[0025]

[0026] The formula for calculating the coal consumption rate of thermal power plants is:

[0027]

[0028] Preferably, in step S3, the data in the tree diagram need to indicate the average coal consumption per hour of different heating units, and the marked points of the wavy lines are the values ​​of the coal consumption per hour.

[0029] When comparing coal consumption losses, coal consumption in different months is still used as a comparison factor for allocation.

[0030] Preferably, in step S4, the calculation formula for power supply heat consumption is:

[0031]

[0032] The calculation formula of gas ratio is:

[0033]

[0034] Preferably, in step S4, the indicators in the thermal process of the unit include the power generation efficiency and power generation heat consumption rate of the thermal power plant, and the calculation formula of the power generation efficiency is:

[0035]

[0036] The calculation formula for power generation heat rate is:

[0037]

[0038] Preferably, the calculation equation for the actual energy consumption of hot spot cogeneration is:

[0039]

[0040] Preferably, in step S4, during the cogeneration process of the heating unit, the factors affecting energy consumption are temperature, pressure, flow, single unit load, and multiple unit loads.

[0041] Preferably, in step S5, the actual allocation method of thermal power load adopts a particle swarm algorithm. In order to find the optimal solution for optimization, the heating units that meet the constraints are given priority for power generation, and the allocation is expanded to other heating units according to the adaptability of the two groups of units.

[0042] When using particle swarm optimization to optimize the thermal load of a cogeneration heating unit, it is necessary to consider the boundary limits of the cogeneration thermal load, meet the requirements of uniform heating and water temperature, and determine the maximum and minimum power generation of the heating unit to avoid the heating unit exceeding the load range.

[0043] When analyzing the example results, it is necessary to collect real-time data on the operation of the heating unit. The collected data includes power, extraction volume, steam volume, water supply volume, etc.

[0044] Preferably, in step S5, the calculation formula for optimizing the distribution of thermal and electric loads is:

[0045]

[0046] (III) Beneficial effects

[0047] Compared with the prior art, the present invention provides a method for optimizing the thermal power load of a cogeneration heating unit, which has the following beneficial effects:

[0048] 1. The method for optimizing the thermal power load of the cogeneration heating unit collects specific data of the heating unit, calculates according to the specific data produced by the thermal power plant, models the calculated values, analyzes the energy consumption of the cogeneration, and finally obtains the energy consumption equation. The energy consumption equation is used to optimize the thermal power load of the heating unit, thereby avoiding energy waste caused by evenly distributing the thermal power load and improving the energy utilization rate of the cogeneration heating unit.

[0049] 2. The thermal load optimization method of the cogeneration heating unit is based on the analysis of the average coal consumption of the actual thermal power plant, and the calculation of the power generation efficiency and the power generation heat rate. The factors that can affect the energy consumption are applied to the analysis and allocated one by one according to the actual adaptability of the unit, thereby improving the accuracy of the optimization method. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 The present invention is optimized flow chart. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 are within the scope of protection of the present invention.

[0052] See also Figure 1 The present invention provides a technical solution: a method for optimizing the thermal load of a cogeneration heating unit, comprising the following steps:

[0053] S1. Unit data collection

[0054] The types and quantities of heating units that need to be optimized for thermal power load and the production data of thermal power plants are collected, statistically processed, and their power, energy consumption and other data are calculated and finally summarized into a table.

[0055] S2. Calculation of thermal power plant production data

[0056] Based on the collected data from the thermal power plants, calculations are performed to obtain the thermal power plant utilization efficiency, power generation rate, and coal consumption rate, and the data results are summarized.

[0057] S3. Modeling of multiple heating units

[0058] The calculated data results are constructed into a table in the form of a tree diagram, and the continuous changes are marked with wavy lines for comparison.

[0059] S4. Analysis of energy consumption of combined heat and power

[0060] According to the tree diagram, the indicators of the thermal process of the cogeneration unit are analyzed and calculated, and the factors that affect the energy consumption of the energy generated in the cogeneration process of the heating unit are analyzed to obtain the actual energy consumption equation of cogeneration.

[0061] S5. Thermal power load optimization

[0062] The actual distribution of thermal power load is carried out based on the actual energy consumption equation of cogeneration, and modeling is carried out for analysis. According to the example results, the distribution of thermal power load is continuously optimized until the thermal power load optimization method with the lowest cost is obtained.

[0063] Furthermore, in step S1, the production power of the thermal power plant is calculated as follows:

[0064] B i =D i T i 2 +e i T i +f i ,i.

[0065] The energy consumption calculation formula of thermal power plant is:

[0066]

[0067] Furthermore, in step S2, the calculation formula for the fuel utilization efficiency of the thermal power plant is:

[0068]

[0069] The calculation formula for the power generation efficiency of a thermal power plant is:

[0070]

[0071] The calculation formula for the coal consumption rate of thermal power plants is:

[0072]

[0073] Furthermore, in step S3, the data in the tree diagram need to indicate the average hourly coal consumption of different heating units, and the marked points of the wavy lines are the values ​​of the hourly coal consumption.

[0074] When comparing coal consumption losses, coal consumption in different months is still used as a comparison factor for allocation.

[0075] Furthermore, in step S4, the calculation formula for power supply heat consumption is:

[0076]

[0077] The calculation formula of gas ratio is:

[0078]

[0079] Furthermore, in step S4, the indicators in the thermal process of the unit include the power generation efficiency and power generation heat consumption rate of the thermal power plant, and the calculation formula of the power generation efficiency is:

[0080]

[0081] The calculation formula for power generation heat rate is:

[0082]

[0083] Furthermore, the calculation equation for the actual energy consumption of hot spot cogeneration is obtained as follows:

[0084]

[0086] Furthermore, in step S4, during the cogeneration process of the heating unit, the factors affecting energy consumption are temperature, pressure, flow, single unit load, and multiple unit loads.

[0087] Furthermore, in step S5, the actual allocation method of thermal power load adopts a particle swarm algorithm. In order to find the optimal solution, the heating units that meet the constraints are given priority to generate electricity, and according to the adaptability of the two groups of units, the allocation is expanded to other heating units.

[0088] When using particle swarm optimization to optimize the thermal load of a cogeneration heating unit, it is necessary to consider the boundary limits of the cogeneration thermal load, meet the requirements of uniform heating and water temperature, and determine the maximum and minimum power generation of the heating unit to avoid the heating unit exceeding the load range.

[0089] When analyzing the example results, it is necessary to collect real-time data on the operation of the heating unit. The collected data includes power, extraction volume, steam volume, water supply volume, etc.

[0090] Furthermore, in step S5, the calculation formula for optimizing the distribution of thermal power load is:

[0091]

[0092] The method for optimizing the thermal power load of the cogeneration heating unit collects specific data of the heating unit, calculates according to the specific data produced by the thermal power plant, models the calculated values, analyzes the energy consumption of the cogeneration, and finally obtains the energy consumption equation. The energy consumption equation is used to optimize the thermal power load of the heating unit, thereby avoiding energy waste caused by the average distribution of the thermal power load and improving the energy utilization rate of the cogeneration heating unit. At the same time, it is analyzed according to the actual average coal consumption of the thermal power plant, and the power generation efficiency and the power generation heat consumption rate are calculated. The factors that can affect the energy consumption are applied to the analysis, and are allocated one by one according to the actual adaptation process of the unit, thereby improving the accuracy of the optimization method.

[0093] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for optimizing thermal power load of a cogeneration heating unit, characterized in that: The following steps are involved: S1. Unit data collection Collect the types and quantities of heating units that need to optimize thermal power load and the production data of thermal power plants, perform statistical processing after the collection is completed, calculate their power, energy consumption and other data, and finally summarize them into a table; S2. Calculation of thermal power plant production data Calculate the utilization efficiency, power generation rate, and coal consumption rate of the thermal power plant based on the collected data of the thermal power plant, and summarize the data results; S3. Modeling of multiple heating units The calculated data results are constructed into a table in the form of a tree diagram, and the continuous changes are marked with wavy lines for comparison; S4. Analysis of energy consumption of combined heat and power According to the tree diagram, the indicators of the thermal process of the cogeneration unit are analyzed and calculated, and the factors that affect the energy consumption of the energy generated in the cogeneration process of the heating unit are analyzed to obtain the actual energy consumption equation of the cogeneration; S5. Thermal power load optimization The actual distribution of thermal power load is carried out based on the actual energy consumption equation of cogeneration, and modeling is carried out for analysis. According to the example results, the distribution of thermal power load is continuously optimized until the thermal power load optimization method with the lowest cost is obtained.

2. A method for optimizing thermal power load of a cogeneration heating unit according to claim 1, characterized in that: In step S1, the production power of the thermal power plant is calculated as follows: B i =D i T i 2 +e i T i +f i ,i; The energy consumption calculation formula of thermal power plant is:

3. The method for optimizing thermal power load of a cogeneration heating unit according to claim 1, characterized in that: In step S2, the calculation formula for the fuel utilization efficiency of the thermal power plant is: The calculation formula for the power generation efficiency of a thermal power plant is: The formula for calculating the coal consumption rate of thermal power plants is:

4. The method for optimizing thermal power load of a cogeneration heating unit according to claim 1, characterized in that: In step S3, the data in the tree diagram must indicate the average coal consumption per hour of different heating units, and the marked points of the wavy lines are the values ​​of the coal consumption per hour; When comparing coal consumption losses, coal consumption in different months is still used as a comparison factor for allocation.

5. The method for optimizing thermal power load of a cogeneration heating unit according to claim 1, characterized in that: In step S4, the calculation formula for power supply heat consumption is: The calculation formula of gas ratio is:

6. A method for optimizing thermal power load of a cogeneration heating unit according to claim 1, characterized in that: In step S4, the indicators in the thermal process of the unit include the power generation efficiency and power generation heat consumption rate of the thermal power plant, and the calculation formula of the power generation efficiency is: The calculation formula for power generation heat rate is:

7. The method for optimizing thermal power load of a cogeneration heating unit according to claim 1, characterized in that: In step S4, the calculation equation for the actual energy consumption of hot spot cogeneration is obtained as follows:

8. The method for optimizing thermal power load of a cogeneration heating unit according to claim 1, characterized in that: In the step S4, during the cogeneration process of the heating unit, the factors that affect the energy consumption are temperature, pressure, flow, single unit load, and multiple unit loads.

9. The method for optimizing thermal power load of a cogeneration heating unit according to claim 1, characterized in that: In step S5, the actual allocation method of thermal power load adopts a particle swarm algorithm. In order to find the optimal solution, the power generation of the heating units that meet the constraints is given priority, and according to the adaptability of the two groups of units, the distribution is expanded to other heating units; When using particle swarm optimization to optimize the thermal load of a cogeneration heating unit, it is necessary to consider the boundary limit of the cogeneration thermal load, meet the requirements of uniform heating and water temperature, and determine the maximum and minimum power generation of the heating unit to avoid the heating unit exceeding the load range; When analyzing the example results, it is necessary to collect real-time data on the operation of the heating unit. The collected data includes power, extraction volume, steam volume, water supply volume, etc.

10. A method for optimizing thermal power load of a cogeneration heating unit according to claim 1, characterized in that: In step S5, the calculation formula for optimizing the distribution of thermal and electric loads is:

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