Method, device and equipment for determining operation energy consumption of thermal power generating unit and monitoring system

Abstract

The embodiment of the invention discloses a thermal power generating unit operation energy consumption determination method, device and equipment and a monitoring system. The method comprises the steps that cold end operation parameters and condenser performance curves of at least two thermal power generating units with the same power level in a preset period are obtained; correcting the target parameters of each thermal power generating unit based on the condenser performance curve, and determining a corrected vacuum value of each thermal power generating unit; determining the coal consumption influence value of the cold end operation parameter deviation of each thermal power generating unit by using the coal consumption parameter of the thermal power generating unit based on the corrected vacuum value and the current circulating water pump power consumption rate; and determining the operation economy of each thermal power generating unit based on the coal consumption influence value. The technical problem that thermal power generating units of the same type cannot determine the unit cold end operation economy due to parameter differences is solved, cold end capacity benchmarking of the thermal power generating units under different operation working conditions and different environment conditions is achieved, and then the technical effect of determining the cold end operation economy of the thermal power generating units is achieved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of energy consumption monitoring of thermal power plants, and in particular to a method, device, equipment and monitoring system for determining the operating energy consumption of a thermal power unit. Background Art

[0002] In the current power market, with the rapid growth of installed capacity of new energy sources, the load rate of thermal power units has decreased, and the peak-shaving range has expanded. Most units will deviate from the rated load for a long time. At the same time, due to the influence of ambient temperature on the units in different seasons, there are large differences in the cold-end circulating water temperature. In summary, when parameters such as unit load rate and circulating water temperature deviate from the design values, the operating economy of cold-end equipment such as the unit condenser and circulating pump cannot be analyzed. In addition, due to differences in the geographical locations and cooling conditions of each unit, the parameters such as the circulating water temperature and load rate of the same type of units are also different, resulting in the inability to benchmark parameters between units of the same type, and the inability to judge the advantages and disadvantages of the cold-end operating economy of the unit. Summary of the invention

[0003] The embodiments of the present invention provide a method, device, equipment and monitoring system for determining the operating energy consumption of a thermal power unit, which solves the technical problem that the same type of thermal power units cannot determine the operating economy of the cold end of the unit due to parameter differences.

[0004] An embodiment of the present invention provides a method for determining the operating energy consumption of a thermal power unit, the method comprising:

[0005] Obtaining cold end operating parameters and condenser performance curves of at least two thermal power units with the same power level within a preset period, wherein the cold end operating parameters at least include: current load rate, current condenser inlet water temperature, current vacuum value, and current circulating water pump power consumption rate;

[0006] Based on the condenser performance curve, the target parameters of each of the thermal power units are corrected, and the corrected vacuum value of each of the thermal power units is determined, wherein the target parameters at least include the current load rate and the current condenser inlet water temperature;

[0007] Determine the coal consumption impact value of the cold end operation parameter deviation of each of the thermal power units by using the coal consumption parameters of the thermal power units, based on the corrected vacuum value and the current power consumption rate of the circulating water pump, wherein the coal consumption parameters at least include the benchmark coal consumption of the thermal power units and the relationship between the plant power consumption rate and the benchmark coal consumption;

[0008] The operating economy of each of the thermal power units is determined based on the coal consumption impact value.

[0009] Further, correcting the target parameters of each of the thermal power units based on the condenser performance curve, and determining the corrected vacuum value of each of the thermal power units includes:

[0010] Querying the condenser performance curve of each thermal power unit, wherein the condenser performance curve at least includes a vacuum-back pressure curve and a condenser inlet water temperature-back pressure curve;

[0011] Determine the relationship between the vacuum value of each thermal power unit and the target parameter based on the condenser performance curve;

[0012] The corrected vacuum value of each thermal power unit is determined based on the variation relationship between the vacuum value and the target parameter.

[0013] Further, using the coal consumption parameters of the thermal power units, based on the corrected vacuum value and the current circulating water pump power consumption rate, determining the coal consumption impact value of the cold end operating parameter deviation of each of the thermal power units includes:

[0014] Calculating a first deviation between the corrected vacuum value and the calibrated vacuum value of each thermal power unit, and a second deviation between the current circulating water pump power consumption rate and the calibrated power consumption rate of each thermal power unit, wherein the calibrated vacuum value is the average value of the corrected vacuum values ​​of each thermal power unit, and the calibrated power consumption rate is the average value of the current circulating water pump power consumption rate of each thermal power unit;

[0015] Determine a first coal consumption impact value of the corresponding thermal power group by using the coal consumption parameter of the thermal power group and the first deviation, and determine a second coal consumption impact value of the corresponding thermal power group by using the coal consumption parameter of the thermal power group and the second deviation;

[0016] The first coal consumption impact value and the second coal consumption impact value are used to determine the coal consumption impact value of the cold end operating parameter deviation of the corresponding thermal power unit.

[0017] Further, determining the relationship between the vacuum value of each thermal power unit and the target parameter based on the condenser performance curve includes:

[0018] A first variation relationship between the vacuum value of each thermal power unit and the load rate is determined based on the vacuum-back pressure curve, and a second variation relationship between the vacuum value of each thermal power unit and the condenser inlet water temperature is determined based on the condenser inlet water temperature-back pressure curve.

[0019] Further, determining the corrected vacuum value of each thermal power unit based on the relationship between the vacuum value and the target parameter includes:

[0020] A vacuum value for correcting the current load rate to a target load rate is determined based on the first change relationship, and a vacuum value for correcting the current condenser inlet water temperature to a target water temperature is determined based on the second change relationship.

[0021] Further, determining the operating economy of each of the thermal power units based on the coal consumption impact value includes:

[0022] Based on the coal consumption impact value, it is determined that among the thermal power units, the thermal power unit with the smallest coal consumption impact value has the best operating economics.

[0023] Further, obtaining condenser performance curves of at least two thermal power units with the same power level includes:

[0024] The condenser performance curves of at least two thermal power units with the same power level are obtained through the condenser manual of the thermal power unit, or through a condenser thermal performance test.

[0025] The embodiment of the present invention further provides a device for determining the operating energy consumption of a thermal power unit, the device comprising:

[0026] A parameter acquisition unit, used to acquire cold end operation parameters and condenser performance curves of at least two thermal power units with the same power level within a preset period, wherein the cold end operation parameters at least include: current load rate, current condenser inlet water temperature, current vacuum value, and current circulating water pump power consumption rate;

[0027] a parameter correction unit, configured to correct the target parameters of each of the thermal power units based on the condenser performance curve, and determine the corrected vacuum value of each of the thermal power units, wherein the target parameters at least include the current load rate and the current condenser inlet water temperature;

[0028] An impact value determination unit is used to determine the coal consumption impact value of the cold end operation parameter deviation of each of the thermal power units based on the corrected vacuum value and the current circulating water pump power consumption rate by using the coal consumption parameters of the thermal power units, wherein the coal consumption parameters at least include the benchmark coal consumption of the thermal power units and the relationship between the plant power consumption rate and the benchmark coal consumption;

[0029] An economic determination unit is used to determine the operating economy of each of the thermal power units based on the coal consumption impact value.

[0030] The embodiment of the present invention further provides a device for determining the operating energy consumption of a thermal power unit, the device comprising:

[0031] at least one processor; and

[0032] a memory communicatively connected to the at least one processor; wherein,

[0033] The memory stores a computer program executable 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 method for determining the operating energy consumption of a thermal power unit described in any of the above embodiments.

[0034] An embodiment of the present invention further provides a system for monitoring the operating energy consumption of a thermal power plant, and the system for monitoring the operating energy consumption of a thermal power plant executes the method for determining the operating energy consumption of a thermal power unit described in any of the above embodiments.

[0035] The embodiment of the present invention discloses a method, device, equipment and monitoring system for determining the operating energy consumption of a thermal power unit. The method includes: obtaining cold end operating parameters and condenser performance curves of at least two thermal power units with the same power level within a preset period; correcting the target parameters of each thermal power unit based on the condenser performance curve, and determining the corrected vacuum value of each thermal power unit; using the coal consumption parameters of the thermal power unit, based on the corrected vacuum value and the current circulating water pump power consumption rate, determining the coal consumption impact value of the cold end operating parameter deviation of each thermal power unit; and determining the operating economy of each thermal power unit based on the coal consumption impact value. The present application uniformly corrects the cold end operating parameters of the thermal power unit under different working conditions, and determines its coal consumption impact value by using the cold end operating parameter deviation after the parameters are corrected to the same standard, and then determines the operating economy of the thermal power unit, thereby solving the technical problem that the same type of thermal power units cannot determine the cold end operating economy of the unit due to parameter differences, and realizes the cold end capacity benchmarking of the thermal power unit under different operating conditions and different environmental conditions, thereby determining the technical effect of the cold end operating economy of the thermal power unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a flow chart of a method for determining the operating energy consumption of a thermal power unit provided by an embodiment of the present invention;

[0037] Figure 2 It is a condenser performance curve diagram of a thermal power unit provided by an embodiment of the present invention;

[0038] Figure 3 is a flow chart of another method for determining the operating energy consumption of a thermal power unit provided by an embodiment of the present invention;

[0039] Figure 4 It is a structural diagram of a device for determining the operating energy consumption of a thermal power unit provided by an embodiment of the present invention;

[0040] Figure 5 It is a structural schematic diagram of a device for determining the operating energy consumption of a thermal power unit provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0042] It should be noted that the terms "first", "second", etc. in the specification, claims and drawings of the present invention are used to distinguish different objects, rather than to limit a specific order. The following embodiments of the present invention can be implemented separately, or in combination with each other, and the embodiments of the present invention do not impose specific limitations on this.

[0043] The steam turbine cold end system is an important auxiliary system of coal-fired power units, which has a great impact on the safe and economic operation of the entire unit. As the most important operating parameter of the cold end system, the steam turbine vacuum directly affects the energy consumption of the unit. However, if the vacuum of the unit is to be improved, the operating power consumption of the cold end equipment needs to be increased. Therefore, when the unit is under different operating conditions, it is an important means to reduce the power generation cost of the unit and improve quality and efficiency by comprehensively considering the impact of the unit's operating vacuum and plant power consumption rate.

[0044] The vacuum value of the steam turbine is mainly affected by the heat load of the condenser and the cooling capacity of the unit. The heat load of the condenser is mainly affected by the exhaust flow rate of the low-pressure cylinder. The higher the load of the unit under pure condensing conditions, the greater the exhaust flow rate of the low-pressure cylinder, and the more heat that needs to be cooled in the condenser, that is, the greater the heat load of the condenser. At the same time, the stronger the cooling capacity of the unit, the more heat can be taken away in the condenser, and the lower the corresponding temperature and pressure, that is, the better the vacuum value of the unit. Therefore, the factors affecting the cooling capacity of the unit mainly include the heat exchange conditions of equipment such as the condenser, circulating water pump, cooling tower, and the influence of ambient temperature (i.e., circulating water temperature). However, since the load rate and circulating water temperature of thermal power units in different regions often vary greatly, and there is no unified comparison method, it is impossible to perform parameter benchmarking between units, which affects the judgment and analysis of the cold end operation by the operating personnel. In response to this problem, an embodiment of the present invention provides a method for determining the operating energy consumption of a thermal power unit.

[0045] Figure 1 The present invention provides a flow chart of a method for determining the operating energy consumption of a thermal power unit.

[0046] like Figure 1 As shown, the method for determining the operating energy consumption of the thermal power unit specifically includes the following steps:

[0047] S101, obtaining cold end operating parameters and condenser performance curves of at least two thermal power units with the same power level within a preset period, wherein the cold end operating parameters at least include: current load rate, current condenser inlet water temperature, current vacuum value, and current circulating water pump power consumption rate.

[0048] Optionally, obtaining condenser performance curves of at least two thermal power units with the same power level includes: obtaining condenser performance curves of at least two thermal power units with the same power level through condenser manuals of the thermal power units, or through condenser thermal performance tests.

[0049] Specifically, a condenser is a heat exchanger that condenses steam from a steam turbine into water, also known as a rehydrator. Condensers are mainly used in steam turbine power plants and are divided into two types: water-cooled condensers and air-cooled condensers. The condenser performance curve is the condenser pressure diagram corresponding to the condenser under different heat loads, circulating water temperatures, and circulating water flow rates. Figure 2 , Figure 2 is a condenser performance curve diagram of a thermal power unit provided by an embodiment of the present invention, Figure 2 It reflects the relationship between the exhaust volume and back pressure of the condenser at different condenser inlet water temperatures (i.e., circulating water temperatures). When the exhaust pressure exceeds atmospheric pressure, the back pressure is positive pressure; when it is lower than atmospheric pressure, the back pressure is negative pressure, i.e., vacuum. The condenser performance curve of a thermal power unit can be obtained through the condenser manual or by conducting a condenser thermal performance test, which serves as the basis for subsequent load and circulating water temperature correction of the unit vacuum.

[0050] The preset period can be set as needed, and the preset period is generally set to one month. The cold end operation parameters of multiple thermal power units in a statistical period are obtained. Exemplarily, the current load rate, the current condenser inlet water temperature, the current vacuum value, and the current circulating water pump power consumption rate of five 600MW thermal power units in one month are obtained, and their average values ​​are calculated respectively. See Table 1, which is a cold end operation parameter table of five 600MW thermal power units in one month.

[0051] Table 1. Cold end operating parameters of 5 600MW thermal power units within one month

[0052]

[0053] S102, correcting target parameters of each thermal power unit based on the condenser performance curve, and determining a corrected vacuum value of each thermal power unit, wherein the target parameters at least include a current load rate and a current condenser inlet water temperature.

[0054] Specifically, in order to uniformly correct the target parameters of multiple thermal power units under different operating conditions, it is necessary to determine the corrected target values ​​of the target parameters. Generally speaking, the corrected target values ​​can be determined as load factor corrected to 100% and condenser inlet water temperature corrected to 20° C. based on the optimal operating state experience of the thermal power units. Then, the condenser performance curve of each thermal power unit is queried according to the corrected target value, and the corrected vacuum value of each thermal power unit corrected from the current load factor to the corrected target value of the load factor is determined, and the corrected vacuum value of each thermal power unit corrected from the current condenser inlet water temperature to the corrected target value of the condenser inlet water temperature is determined.

[0055] It should be noted that there are certain differences in the condenser performance curves corresponding to thermal power units of different capacities and types. Therefore, the correction needs to be based on the condenser performance curves of each thermal power unit.

[0056] For example, the current condenser inlet water temperature of unit 1 is 31.18°C. If it is corrected to 20°C, the query is similar to Figure 2 The condenser performance curve shown is Figure 2 is the condenser performance curve of a certain thermal power unit, not the condenser characteristic curve of unit 1, which is only an example here), so as to determine the corrected vacuum value of unit 1. Table 2 shows the vacuum values ​​of the five 600MW thermal power units in Table 1 after the target parameters are corrected. Referring to Table 2, after obtaining the corrected vacuum values, the deviation between the corrected vacuum value and the benchmark value can be calculated. It refers to the difference between the corrected vacuum value and the benchmark value, where the benchmark value here is selected as the average value of the corrected vacuum values ​​of the five thermal power units, 4.37.

[0057] Table 2. Vacuum values ​​after target parameter correction for 5 thermal power units

[0058]

[0059] It should be noted that, in one case, the benchmark value can be a calibration value pre-set according to the operating experience of the thermal power unit. However, due to the differences in operating conditions and operating environments of different thermal power units, there is a large deviation in setting the benchmark value using this method; in another case, the average parameter value of multiple thermal power units can be used as the benchmark value. As shown in Table 2 above, the average value of the corrected vacuum values ​​of the five thermal power units in Table 1 is calculated to be 4.37, and 4.37 is the benchmark value for calculating the deviation.

[0060] S103, using the coal consumption parameters of the thermal power units, based on the corrected vacuum value and the current power consumption rate of the circulating water pump, determine the coal consumption impact value of the cold end operating parameter deviation of each thermal power unit, wherein the coal consumption parameters at least include the benchmark coal consumption of the thermal power units and the relationship between the plant power consumption rate and the benchmark coal consumption.

[0061] Specifically, the coal consumption parameters of the thermal power unit include the benchmark coal consumption of the thermal power unit and the relationship between the plant power consumption rate and the benchmark coal consumption, wherein the benchmark coal consumption can be determined by obtaining the condenser pressure of the thermal power unit to the heat consumption rate correction curve, and the relationship between the plant power consumption rate and the benchmark coal consumption can be determined by the impact value of the change of the plant power consumption rate on the heat consumption or coal consumption.

[0062] The correction curve of condenser pressure to heat rate can be obtained through the thermal characteristics of the steam turbine or by conducting a thermal performance test of the steam turbine, and the impact value of the change in the plant power rate can be calculated through the actual operation of the unit. For example, it is usually only necessary to calculate the heat rate or benchmark coal consumption of the unit turbine within a statistical period. For example, when the benchmark coal consumption of the thermal power unit is 300g / kWh and the plant power rate is 5%, when the plant power rate increases or decreases by 1%, the benchmark coal consumption changes by about 3 to 3.5g / kWh, where the benchmark coal consumption is the power supply coal consumption of the thermal power plant, see Table 3, which shows the impact of the change in coal consumption of the cold end operating parameters of the 5 thermal power units in Table 1 deviating from the benchmark value.

[0063] Table 3. Coal consumption impact value table of cold end operation deviation

[0064]

[0065] Referring to Table 3, the average value of the corrected vacuum value (4.37 kPa shown in Table 2) is used as the benchmark value of the vacuum value, and the average value of the circulating water pump power consumption rate (0.96% shown in Table 1) is used as the benchmark value of the power consumption rate. The corrected vacuum value and the circulating water pump power consumption rate are compared with the corresponding benchmark values ​​to obtain the deviation between the corrected vacuum value and the benchmark value, and the deviation between the circulating water pump power consumption rate and the benchmark value. Then, the impact values ​​of the two deviations on the coal consumption of the thermal power unit are calculated to obtain the coal consumption impact value of the vacuum deviation and the coal consumption impact value of the circulating water pump power consumption rate deviation.

[0066] The actual change values ​​of heat consumption or coal consumption affected by the above two factors are added together to obtain the coal consumption impact value of the cold end operating parameter deviation.

[0067] S104, determining the operating economy of each thermal power unit based on the coal consumption impact value.

[0068] Optionally, S104 specifically includes: determining, based on the coal consumption impact value, that the thermal power unit with the smallest coal consumption impact value among the thermal power units has the best operating economics.

[0069] Specifically, in the coal consumption impact value of the cold end operation parameter deviation shown in Table 3, a negative number indicates the saved coal consumption, and a positive number indicates the increased coal consumption. Therefore, the smaller the coal consumption impact value, the better the operation economics of the thermal power unit. For example, referring to Table 3, the coal consumption of unit 1 increased by about 0.92g / kWh compared with the benchmark value due to the cold end operation parameter deviation, and its cold end operation economics was poor. The coal consumption of unit 4 decreased by about 1.23g / kWh due to the cold end operation parameter deviation compared with the benchmark value, and the cold end operation economics was good.

[0070] The present application uniformly corrects the cold-end operating parameters of thermal power units under different operating conditions, and after the parameters are corrected to the same standard, uses the cold-end operating parameter deviation to determine the coal consumption impact value, and then determines the operating economics of the thermal power units. This solves the technical problem that the same type of thermal power units cannot determine the cold-end operating economy of the units due to parameter differences, and achieves the technical effect of benchmarking the cold-end capabilities of thermal power units under different operating conditions and different environmental conditions, and then determining the cold-end operating economy of the thermal power units.

[0071] On the basis of the above technical solutions, Figure 3 FIG. 1 is a flow chart of another method for determining the operating energy consumption of a thermal power unit provided by an embodiment of the present invention. Figure 3 As shown, S102 specifically includes:

[0072] S301, querying the condenser performance curve of each thermal power unit, wherein the condenser performance curve at least includes a vacuum-back pressure curve and a condenser inlet water temperature-back pressure curve.

[0073] Specifically, the condenser performance curve is the condenser pressure diagram corresponding to the condenser under different heat loads, circulating water temperatures, and circulating water flow rates, and therefore includes the relative pressure variation diagram of different condenser parameters, see Figure 2 , Figure 2 This is the condenser inlet water temperature-back pressure curve of a thermal power unit.

[0074] S302, determining the relationship between the vacuum value of each thermal power unit and the target parameter based on the condenser performance curve.

[0075] Optionally, S302 specifically includes: determining a first variation relationship between the vacuum value of each thermal power unit and the load rate based on the vacuum-back pressure curve, and determining a second variation relationship between the vacuum value of each thermal power unit and the condenser inlet water temperature based on the condenser inlet water temperature-back pressure curve.

[0076] Specifically, the target parameters include at least the current load rate and the current condenser inlet water temperature. Therefore, it is necessary to determine the first change relationship between the load rate and the vacuum value, and the second change relationship between the condenser inlet water temperature and the vacuum value, respectively. For example, see Figure 2When the exhaust volume is 100t / h, the back pressure is 9kPa at the condenser inlet water temperature of 35℃, and it drops to 5kPa at 20℃. Then, the corresponding vacuum value is determined according to the back pressure to obtain the second change relationship.

[0077] S303, determining the corrected vacuum value of each thermal power unit based on the relationship between the vacuum value and the target parameter.

[0078] Optionally, S303 specifically includes: determining a vacuum value for correcting the current load rate to the target load rate based on the first change relationship, and determining a vacuum value for correcting the current condenser inlet water temperature to the target water temperature based on the second change relationship.

[0079] Specifically, after the first change relationship and the second change relationship are obtained, the corresponding corrected vacuum value can be obtained according to the condenser performance curve.

[0080] On the basis of the above technical solutions, S103 specifically includes:

[0081] S1, calculate the first deviation between the corrected vacuum value and the calibrated vacuum value of each thermal power unit, and the second deviation between the current circulating water pump power consumption rate and the calibrated power consumption rate of each thermal power unit, wherein the calibrated vacuum value is the average value of the corrected vacuum values ​​of each thermal power unit, and the calibrated power consumption rate is the average value of the current circulating water pump power consumption rate of each thermal power unit.

[0082] Specifically, the calibrated vacuum value is the average value of the corrected vacuum value in Table 2, and the calibrated power consumption rate is the average value of the current circulating water pump power consumption rate in Table 1. The calibrated vacuum value and the calibrated power consumption rate are both the above-mentioned benchmark values. The benchmark value can be a calibration value pre-set based on the operating experience of the thermal power unit, or it can be the average value of the parameters of multiple thermal power units used in this application; the deviation between the corrected vacuum value in Table 3 and the benchmark value is the above-mentioned first deviation, and the deviation between the circulating water pump power consumption rate in Table 3 and the benchmark value is the above-mentioned second deviation.

[0083] S2, determining a first coal consumption impact value of the corresponding thermal power group using the coal consumption parameter of the thermal power group and the first deviation, and determining a second coal consumption impact value of the corresponding thermal power group using the coal consumption parameter of the thermal power group and the second deviation.

[0084] Specifically, the coal consumption impact value of the vacuum deviation in Table 3 is the above-mentioned first coal consumption impact value, and the coal consumption impact value of the circulating water pump power consumption rate deviation in Table 3 is the above-mentioned second coal consumption impact value.

[0085] S3, using the first coal consumption impact value and the second coal consumption impact value to determine the coal consumption impact value of the cold end operating parameter deviation of the corresponding thermal power unit.

[0086] Specifically, the first coal consumption impact value and the second coal consumption impact value are added to obtain the coal consumption impact value of the cold end operation parameter deviation shown in Table 3.

[0087] In summary, the method for determining the operating energy consumption of a thermal power unit provided in this application can realize the comparison of the economic efficiency of the cold end operation of thermal power units in different regions and under different cold end operating conditions. Its main advantages are as follows:

[0088] (1) According to the condenser performance curve, the condenser inlet water temperature of each unit is corrected to unify the cold end operating conditions, providing ideas and methods for the economic comparison of different back pressure units;

[0089] (2) The load rate of each unit is corrected according to the condenser performance curve, and the condenser heat load is unified, which can realize the difference comparison of units under different operating conditions;

[0090] (3) The economic operation of the cold end is comprehensively judged by the corrected vacuum value and the power consumption rate of the circulating water pump, providing guidance for the optimal operation strategy of the unit.

[0091] Figure 4 It is a structural diagram of a device for determining the operating energy consumption of a thermal power unit provided in an embodiment of the present invention.

[0092] like Figure 4 As shown, the device for determining the operating energy consumption of the thermal power unit specifically includes:

[0093] The parameter acquisition unit 41 is used to acquire the cold end operation parameters and condenser performance curves of at least two thermal power units with the same power level within a preset period, wherein the cold end operation parameters at least include: current load rate, current condenser inlet water temperature, current vacuum value, and current circulating water pump power consumption rate;

[0094] A parameter correction unit 42 is used to correct the target parameters of each thermal power unit based on the condenser performance curve and determine the corrected vacuum value of each thermal power unit, wherein the target parameters at least include the current load rate and the current condenser inlet water temperature;

[0095] The impact value determination unit 43 is used to determine the coal consumption impact value of the cold end operation parameter deviation of each thermal power unit by using the coal consumption parameter of the thermal power unit, based on the corrected vacuum value and the current power consumption rate of the circulating water pump, wherein the coal consumption parameter at least includes the benchmark coal consumption of the thermal power unit and the relationship between the plant power consumption rate and the benchmark coal consumption;

[0096] The economic efficiency determination unit 44 is used to determine the operating economic efficiency of each thermal power unit based on the coal consumption impact value.

[0097] Optionally, the parameter correction unit 42 includes:

[0098] The curve query subunit is used to query the condenser performance curve of each thermal power unit, wherein the condenser performance curve at least includes a vacuum-back pressure curve and a condenser inlet water temperature-back pressure curve;

[0099] A variation relationship determination subunit is used to determine the variation relationship between the vacuum value of each thermal power unit and the target parameter based on the condenser performance curve;

[0100] The parameter correction subunit is used to determine the corrected vacuum value of each thermal power unit based on the relationship between the vacuum value and the target parameter.

[0101] Optionally, the influence value determining unit 43 includes:

[0102] a deviation calculation subunit, used to calculate a first deviation between a corrected vacuum value of each thermal power unit and a calibrated vacuum value, and a second deviation between a current circulating water pump power consumption rate of each thermal power unit and a calibrated power consumption rate, wherein the calibrated vacuum value is an average value of the corrected vacuum values ​​of each thermal power unit, and the calibrated power consumption rate is an average value of the current circulating water pump power consumption rates of each thermal power unit;

[0103] A first coal consumption calculation subunit is used to determine a first coal consumption impact value of the corresponding thermal power group using the coal consumption parameter of the thermal power group and the first deviation, and to determine a second coal consumption impact value of the corresponding thermal power group using the coal consumption parameter of the thermal power group and the second deviation;

[0104] The second coal consumption calculation subunit is used to determine the coal consumption impact value of the cold end operation parameter deviation of the corresponding thermal power unit by using the first coal consumption impact value and the second coal consumption impact value.

[0105] Optionally, the change relationship determination subunit is specifically used for:

[0106] The first variation relationship between the vacuum value of each thermal power unit and the load rate is determined based on the vacuum-back pressure curve, and the second variation relationship between the vacuum value of each thermal power unit and the condenser inlet water temperature is determined based on the condenser inlet water temperature-back pressure curve.

[0107] Optionally, the parameter correction subunit is specifically used for:

[0108] A vacuum value for correcting the current load rate to the target load rate is determined based on the first change relationship, and a vacuum value for correcting the current condenser inlet water temperature to the target water temperature is determined based on the second change relationship.

[0109] Optionally, the economic efficiency determination unit is specifically used for:

[0110] Based on the coal consumption impact value, it is determined that among all the thermal power units, the thermal power unit with the smallest coal consumption impact value has the best operating economics.

[0111] Optionally, the parameter acquisition unit 41 is specifically used for:

[0112] The condenser performance curves of at least two thermal power units with the same power level are obtained through the condenser manual of the thermal power unit, or through the condenser thermal performance test.

[0113] The method for determining the operating energy consumption of a thermal power unit provided in an embodiment of the present invention has the same technical features as the device for determining the operating energy consumption of a thermal power unit provided in the above embodiment, so it can also solve the same technical problems and achieve the same technical effects.

[0114] Figure 5 It is a structural schematic diagram of a device for determining the operating energy consumption of a thermal power unit provided by an embodiment of the present invention. The device for determining the operating energy consumption of the thermal power unit is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The device for determining the operating energy consumption of a thermal power unit 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.

[0115] like Figure 5 As shown, the device 10 for determining the energy consumption of a thermal power unit includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the device 10 for determining the energy consumption of a thermal power unit can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0116] Multiple components in the device 10 for determining the operating energy consumption of a thermal power unit are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the device 10 for determining the operating energy consumption of a thermal power unit to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0117] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a method for determining the operating energy consumption of a thermal power unit.

[0118] In some embodiments, the method for determining the operating energy consumption of a thermal power unit may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the device 10 for determining the operating energy consumption of a thermal power unit via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the method for determining the operating energy consumption of a thermal power unit described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to execute the method for determining the operating energy consumption of a thermal power unit in any other appropriate manner (e.g., by means of firmware).

[0119] 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.

[0120] 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.

[0121] 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.

[0122] 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).

[0123] 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.

[0124] 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.

[0125] An embodiment of the present invention further provides a system for monitoring the operating energy consumption of a thermal power plant. The system for monitoring the operating energy consumption of a thermal power plant executes the method for determining the operating energy consumption of a thermal power unit in any of the above embodiments.

[0126] The thermal power plant operation energy consumption monitoring system provided in the embodiment of the present invention uses the method for determining the operating energy consumption of the thermal power unit in the above embodiment. Therefore, the thermal power plant operation energy consumption monitoring system provided in the embodiment of the present invention also has the beneficial effects described in the above embodiment, which will not be repeated here.

[0127] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0128] Finally, it should be noted that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for determining the operating energy consumption of a thermal power unit, characterized in that: The determination method comprises: Obtaining cold end operating parameters and condenser performance curves of at least two thermal power units with the same power level within a preset period, wherein the cold end operating parameters at least include: current load rate, current condenser inlet water temperature, current vacuum value, and current circulating water pump power consumption rate; Based on the condenser performance curve, the target parameters of each of the thermal power units are corrected, and the corrected vacuum value of each of the thermal power units is determined, wherein the target parameters at least include the current load rate and the current condenser inlet water temperature; Determine the coal consumption impact value of the cold end operation parameter deviation of each of the thermal power units by using the coal consumption parameters of the thermal power units, based on the corrected vacuum value and the current power consumption rate of the circulating water pump, wherein the coal consumption parameters at least include the benchmark coal consumption of the thermal power units and the relationship between the plant power consumption rate and the benchmark coal consumption; The operating economy of each of the thermal power units is determined based on the coal consumption impact value.

2. The method for determining the operating energy consumption of a thermal power unit according to claim 1, characterized in that: Correcting the target parameters of each of the thermal power units based on the condenser performance curve and determining the corrected vacuum value of each of the thermal power units includes: Querying the condenser performance curve of each thermal power unit, wherein the condenser performance curve at least includes a vacuum-back pressure curve and a condenser inlet water temperature-back pressure curve; Determine the relationship between the vacuum value of each thermal power unit and the target parameter based on the condenser performance curve; The corrected vacuum value of each thermal power unit is determined based on the relationship between the vacuum value and the target parameter.

3. The method for determining the operating energy consumption of a thermal power unit according to claim 1, characterized in that: Using the coal consumption parameters of the thermal power units, based on the corrected vacuum value and the current circulating water pump power consumption rate, determining the coal consumption impact value of the cold end operation parameter deviation of each thermal power unit includes: Calculating a first deviation between the corrected vacuum value and the calibrated vacuum value of each of the thermal power units, and a second deviation between the current power consumption rate of the circulating water pump of each of the thermal power units and the calibrated power consumption rate, wherein the calibrated vacuum value is the average value of the corrected vacuum values ​​of each of the thermal power units, and the calibrated power consumption rate is the average value of the current power consumption rate of the circulating water pump of each of the thermal power units; Determine a first coal consumption impact value of the corresponding thermal power group by using the coal consumption parameter of the thermal power group and the first deviation, and determine a second coal consumption impact value of the corresponding thermal power group by using the coal consumption parameter of the thermal power group and the second deviation; The first coal consumption impact value and the second coal consumption impact value are used to determine the coal consumption impact value of the cold end operating parameter deviation of the corresponding thermal power unit.

4. The method for determining the operating energy consumption of a thermal power unit according to claim 2, characterized in that: Determining the relationship between the vacuum value of each thermal power unit and the target parameter based on the condenser performance curve includes: A first variation relationship between the vacuum value of each thermal power unit and the load rate is determined based on the vacuum-back pressure curve, and a second variation relationship between the vacuum value of each thermal power unit and the condenser inlet water temperature is determined based on the condenser inlet water temperature-back pressure curve.

5. The method for determining the operating energy consumption of a thermal power unit according to claim 4, characterized in that: Determining the corrected vacuum value of each thermal power unit based on the relationship between the vacuum value and the target parameter includes: A vacuum value for correcting the current load rate to a target load rate is determined based on the first change relationship, and a vacuum value for correcting the current condenser inlet water temperature to a target water temperature is determined based on the second change relationship.

6. The method for determining the operating energy consumption of a thermal power unit according to claim 3, characterized in that: Determining the operating economy of each of the thermal power units based on the coal consumption impact value includes: Based on the coal consumption impact value, it is determined that among the thermal power units, the thermal power unit with the smallest coal consumption impact value has the best operating economics.

7. The method for determining the operating energy consumption of a thermal power unit according to claim 1, characterized in that: Obtaining the condenser performance curves of at least two thermal power units with the same power level includes: The condenser performance curves of at least two thermal power units with the same power level are obtained through the condenser manual of the thermal power unit, or through a condenser thermal performance test.

8. A device for determining the operating energy consumption of a thermal power unit, characterized in that: The determining device comprises: A parameter acquisition unit, used to acquire cold end operation parameters and condenser performance curves of at least two thermal power units with the same power level within a preset period, wherein the cold end operation parameters at least include: current load rate, current condenser inlet water temperature, current vacuum value, and current circulating water pump power consumption rate; a parameter correction unit, configured to correct the target parameters of each of the thermal power units based on the condenser performance curve, and determine the corrected vacuum value of each of the thermal power units, wherein the target parameters at least include the current load rate and the current condenser inlet water temperature; An impact value determination unit is used to determine the coal consumption impact value of the cold end operation parameter deviation of each of the thermal power units based on the corrected vacuum value and the current circulating water pump power consumption rate by using the coal consumption parameters of the thermal power units, wherein the coal consumption parameters at least include the benchmark coal consumption of the thermal power units and the relationship between the plant power consumption rate and the benchmark coal consumption; An economic determination unit is used to determine the operating economy of each of the thermal power units based on the coal consumption impact value.

9. A device for determining the operating energy consumption of a thermal power unit, characterized in that: The determining device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable 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 method for determining the operating energy consumption of a thermal power unit according to any one of claims 1-7.

10. A thermal power plant operation energy consumption monitoring system, characterized in that: The thermal power plant operation energy consumption monitoring system implements the method for determining the operation energy consumption of the thermal power unit described in any one of claims 1 to 7.

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