CN115097730A - Advanced control method and system for desuperheating water regulating valve of high and low bypass heating system - Google Patents
Advanced control method and system for desuperheating water regulating valve of high and low bypass heating system Download PDFInfo
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- CN115097730A CN115097730A CN202210716654.9A CN202210716654A CN115097730A CN 115097730 A CN115097730 A CN 115097730A CN 202210716654 A CN202210716654 A CN 202210716654A CN 115097730 A CN115097730 A CN 115097730A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
- G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
- G05B13/04—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
- G05B13/042—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators in which a parameter or coefficient is automatically adjusted to optimise the performance
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/30—Application in turbines
- F05D2220/31—Application in turbines in steam turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/70—Application in combination with
- F05D2220/76—Application in combination with an electrical generator
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Abstract
The invention discloses an advanced control method and system for a desuperheating water regulating valve of a high-low bypass heating system. The method comprises the steps that a simulation test is carried out to obtain an advanced control curve of the desuperheating water regulating valve of the bypass heating system; the controller controls the opening of the desuperheating water regulating valve according to the opening of the bypass valve, the set post-desuperheater temperature and the leading control curve of the desuperheating water regulating valve.
Description
Technical Field
The invention relates to the technical field of power generation, in particular to an advanced control method and system for a desuperheating water regulating valve of a high-low bypass heating system.
Background
According to the energy planning requirement of the national energy bureau, the installed capacity of new energy electric power such as wind power and photovoltaic can be rapidly and continuously increased, and in order to improve the consumption capability of a power grid to new energy, the peak regulation capability of a thermal power generating unit is required to be improved, the operation flexibility of the thermal power generating unit is improved, and the consumption capability of the new energy is improved. The flexibility transformation of the thermal power generating unit implemented at present enables the unit to have the capability of deep peak regulation, and the main technologies comprise low-load stable combustion of a boiler, low-load denitration, zero output of a low-pressure cylinder, bypass heat supply and the like. The bypass heat supply has the advantages of low investment, flexible operation, high thermal-electric decoupling property and the like, becomes one of the important technologies of thermoelectric decoupling modification of the conventional thermal power generator set, and plays an important role in improving the heat supply capacity of a power plant and realizing deep peak regulation.
However, the bypass heat supply changes the original proportion of steam entering the high and medium pressure cylinders, and deviates from the design value, which directly affects the axial thrust of the unit, and the overrun of the axial thrust causes the thrust bearing temperature, axial displacement and expansion difference of the high and medium pressure cylinders to exceed the limit, which affects the safe and stable operation of the unit, and a typical high-low bypass heat supply system diagram is shown in fig. 1. Aiming at the problem, the existing solution is as follows: and obtaining the flow of the high side valve and the flow of the low side valve according to the mass balance and the energy balance, and controlling the opening of the high side valve according to the one-to-one correspondence of the high side valve and the low side valve and the flow of the low side valve obtained by calculation. The control idea is that the opening degree of the low side valve is adjusted to meet the heat supply requirement, and then when the opening degree of the low side valve reaches a threshold value, the high side valve is opened to keep the axial thrust balance of the high and medium pressure rotor, so that the unit can run safely.
High (low) bypass system diagram is shown in FIG. 2, F 1 +F 2 ＝F 3 ；F 1 ·H 1 +F 2 ·H 2 ＝F 3 ·H 3 ；H 1 ＝f(P 1 ,T 1 )； H 2 ＝f(P 2 ,T 2 )；H 3 ＝f(P 3 ,T 3 ) Wherein F is 1 、P 1 、T 1 The flow (t/h), pressure (MPa) and temperature (DEG C) of bypass steam in front of the desuperheater are shown; f 2 、P 2 、T 2 Flow rate (t/h), pressure (MPa) and temperature (DEG C) of the desuperheating water are shown; f 3 、P 3 、T 3 The flow (t/h), pressure (MPa) and temperature (DEG C) of bypass steam behind the desuperheater are shown; h 1 Is the enthalpy of the bypass steam before the desuperheater; h 2 Is the enthalpy of the desuperheated water; h 3 Is the enthalpy of the bypass steam after the desuperheater. For high side or low side: can measure F in real time 2 、P 1 、P 2 、P 3 、T 1 、T 2 、T 3 Then F can be obtained according to the above formula 1 、F 3 According to respective F of the high and low bypasses 1 The relationship between the high bypass F and the high and medium pressure rotor is obtained by checking the axial thrust of the high and medium pressure rotor according to a thermal balance diagram, and the high bypass F is adjusted by controlling a high bypass valve 1 To match low side F 1 And the axial thrust of the high and medium pressure rotor is in a safe range, so that the safe and stable operation of the unit is ensured.
However, when the unit is actually operating, the following problems arise: when the opening degree of the high side valve (low side valve) is adjusted, the desuperheater water regulating valve can correspondingly act to ensure the back temperature of the desuperheaterDegree in the safety range, T 3 There is a significant delay in the change of (b) due to the delay in the measurement of the temperature change (temperature measuring element: thermocouple/thermal resistor) itself after the desuperheater, and the time required for uniform mixing after the desuperheater. Further, due to T 3 The change of the temperature-reducing water regulating valve can be delayed obviously, the delayed regulation condition of response can also occur to the temperature-reducing water regulating valve, the flow regulation of the temperature-reducing water is delayed, and finally T is caused 3 Longer fluctuation and larger fluctuation can occur, which can seriously affect the control of the steam temperature behind the desuperheater pressurizer, affect the safe operation of a unit and affect the accuracy of the calculation of the flow of the high side valve and the flow of the low side valve.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the embodiment of the invention provides an advanced control method and system for a temperature reduction water regulating valve of a high-low bypass heating system.
The invention provides an advanced control method for a desuperheating water regulating valve of a high-low bypass heating system, which comprises the following steps:
obtaining an advanced control curve of a temperature reduction water regulating valve of a bypass heating system through a simulation test;
and the controller controls the opening of the desuperheating water regulating valve according to the opening of the bypass valve, the set post-desuperheater temperature and the leading control curve of the desuperheating water regulating valve.
In some embodiments, the bypass heating system desuperheating water regulating valve lead control curve comprises a high bypass heating system desuperheating water regulating valve lead control curve and a low bypass heating system desuperheating water regulating valve lead control curve.
In some embodiments, the controller controls the opening degree of the desuperheating water regulating valve of the high-side valve heating system according to the high-bypass heating system desuperheating water regulating valve advanced control curve, and the controller controls the opening degree of the desuperheating water regulating valve of the low-side valve heating system according to the low-bypass heating system desuperheating water regulating valve advanced control curve.
In some embodiments, the controller includes a temperature setting module to set the post-desuperheater temperature.
In some embodiments, the step of obtaining the advanced control curve of the desuperheating water regulating valve of the bypass heating system by the simulation test comprises the following steps:
(1) selecting at least 5 temperature point values between the upper limit and the lower limit of a rear temperature design value of the desuperheater, and selecting at least 5 valve opening point values within the maximum valve opening range of the bypass valve;
(2) putting a high and low bypass heating system to ensure that the high and low bypass heating system stably operates;
(3) adjusting the opening degree of the bypass valve to be a certain valve opening degree value, sequentially setting the temperature behind the desuperheater to be the selected temperature value, adjusting the opening degree of the desuperheating water regulating valve until the high and low bypass heating system stably operates, and recording the opening degree data of the desuperheating water regulating valve under the working condition that the valve opening degree values and the temperature value are combined;
(4) analyzing and processing the opening data of the temperature-reducing water regulating valve under each working condition to obtain the advanced control curve of the temperature-reducing water regulating valve.
In some embodiments, the post-desuperheater temperature design value is determined according to a safe operating range of a unit.
In some embodiments, the bypass valve opening is a certain value, and when the set post-desuperheater temperature is between two adjacent temperature point values, the opening of the desuperheating water regulating valve under the condition that the bypass valve opening and the set post-desuperheater temperature are known is determined according to the adjacent temperature point values and the opening of the desuperheating water regulating valve corresponding to the adjacent temperature point values on a desuperheating water regulating valve advanced control curve.
In some embodiments, the high and low bypass heating systems are operated for a steady state operating time of 20-60 min.
The invention provides a leading control system for a desuperheating water regulating valve of a high and low bypass heating system, which comprises:
the desuperheating water regulating valve is used for regulating desuperheating water flow;
a bypass valve disposed upstream of the desuperheater for adjusting a bypass opening;
the controller comprises a temperature setting module and a control module, and the temperature setting module, the desuperheating water regulating valve and the bypass valve are electrically connected with the control module.
In some embodiments, the bypass steam is reduced in temperature by the desuperheater after passing through the desuperheater.
Compared with the prior art, the invention has the beneficial effects that:
the controller controls the opening of the desuperheating water regulating valve according to the opening of the bypass valve, the set post-desuperheater temperature and the advanced control curve of the desuperheating water regulating valve, so that the conditions of response delay adjustment of the desuperheating water regulating valve caused by the delay of post-desuperheater temperature change and potential safety hazards caused by post-desuperheater temperature fluctuation when the opening of the bypass valve is adjusted are avoided, and meanwhile, the accuracy of high-side valve flow and low-side valve flow calculation is guaranteed.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a diagram of a typical high and low side heating system;
FIG. 2 is a high (low) bypass system diagram;
FIG. 3 is a schematic diagram of an exemplary low-bypass heating system desuperheating water regulating valve advanced control curve;
FIG. 4 is a schematic diagram illustrating an advanced control curve of a desuperheating water regulating valve of a low-bypass heating system according to an embodiment;
FIG. 5 is a schematic diagram illustrating an advanced control curve of a desuperheating water regulating valve of the high-bypass heating system according to an embodiment;
FIG. 6 is a schematic diagram of a control system according to the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The advanced control method and system for the desuperheating water regulating valve of the high and low bypass heating system according to the embodiment of the invention are described below with reference to the attached drawings.
The invention discloses an advanced control method for a desuperheating water regulating valve of a high and low bypass heating system, which comprises the following steps:
obtaining an advanced control curve of a temperature reduction water regulating valve of a bypass heating system through a simulation test;
the controller controls the opening of the desuperheating water regulating valve according to the opening of the bypass valve, the set post-desuperheater temperature and the leading control curve of the desuperheating water regulating valve.
The controller includes the temperature setting module, the temperature setting module is used for setting for the temperature behind the desuperheater, bypass heating system desuperheating water governing valve advanced control curve includes high bypass heating system desuperheating water governing valve advanced control curve and low bypass heating system desuperheating water governing valve advanced control curve, the controller is according to the desuperheating water governing valve advanced control curve control of high bypass heating system desuperheating water governing valve control high side valve heating system's desuperheating water governing valve aperture, the controller is according to the desuperheating water governing valve advanced control curve control of low bypass heating system's desuperheating water governing valve aperture of low side valve heating system.
The method for acquiring the advanced control curve of the desuperheating water regulating valve of the bypass heating system through the simulation test comprises the following steps:
(1) selecting at least 5 temperature point values between the upper limit and the lower limit of a rear temperature design value of the desuperheater, and selecting at least 5 valve opening point values within the maximum valve opening range of the bypass valve;
(2) a high and low bypass heating system is put into use, so that the high and low bypass heating system can stably run;
(3) adjusting the opening of a bypass valve to a certain valve opening point value, sequentially setting the temperature behind the desuperheater to be a selected temperature point value, adjusting the opening of the desuperheating water adjusting valve until the high-low bypass heating system stably operates, and recording the opening data of the desuperheating water adjusting valve under the working condition of combining the opening point values of the valves with the temperature point values;
(4) analyzing and processing the opening data of the temperature-reducing water regulating valve under each working condition to obtain an advanced control curve of the temperature-reducing water regulating valve.
The post-desuperheater temperature design value is determined according to the safe operation range of the unit, the maximum valve opening is determined according to the valve opening in the actual operation process of the unit, and in addition, the more the temperature point value and the valve opening point value are selected, the more reliable the test result is. The stable operation running time of the high and low bypass heating systems is 20-60 min.
In some embodiments, the opening of the bypass valve is adjusted to a certain valve opening point value, the temperature after the desuperheater is set to a selected temperature point value in sequence, the opening of the desuperheating water adjusting valve is adjusted until the high and low bypass heating system stably operates, and opening data of the desuperheating water adjusting valve under the combined working condition of each valve opening point value and the temperature point value is recorded. Specifically, 5 temperature point values are sequentially selected between the upper limit and the lower limit of a post-desuperheater temperature design value, wherein the temperature point values are respectively T 3a 、T 3b 、T 3c 、T 3d 、T 3e Wherein, T 3a Is a maximum value, T 3e Is the minimum value; selecting 5 valve opening point values within the range of the maximum valve opening according to the selection of the maximum valve opening in the actual operation process of the unit, wherein the valve opening point values are K a 、K b 、K c 、K d 、K e (ii) a Putting into high and low side heating system, and stably operating for 30 min; and adjusting the bypass valve to be the opening point value of each valve, simultaneously setting the post-desuperheater temperature set value in sequence, adjusting the opening of the desuperheater water regulating valve until the system stably runs for 30min, and recording the final opening (J) of the desuperheater water regulating valve.
For example, the opening data record table of the desuperheating water regulating valve under the combined working condition of each valve opening point value and the temperature point value is shown in table 1.
Table 1: and the opening data of the desuperheating water regulating valve under the combined working condition of each valve opening point value and each temperature point value is recorded in an example table.
And analyzing and processing the data recorded in the table 1 to obtain an advanced control curve of the temperature-reducing water regulating valve of the bypass heating system.
Illustratively, the low-bypass heating system desuperheating water regulating valve advanced control curve, as shown in FIG. 3. The opening degree of the bypass valve is a certain value, and when the set post-desuperheater temperature is between two adjacent temperature point values, the opening degree of the desuperheating water regulating valve under the conditions that the opening degree of the bypass valve and the set post-desuperheater temperature are known is determined according to the adjacent temperature point values and the opening degree of the desuperheating water regulating valve corresponding to the adjacent temperature point values on the leading control curve of the desuperheating water regulating valve. For example, when the opening degree of the low side valve is D, the advance control parameter J of the low side desuperheating water regulating valve can be automatically given according to the advance control curve of the desuperheating water regulating valve of the low side heating system and the set post-valve temperature of the desuperheater, such as the set temperature T 30 At two adjacent T 3 (with T) 3a Corresponds to J a 、T 3b For example, correspond to J b ) Between the test values, J can be determined by the following method 0 ：
Similarly, when the opening degree of the high-side valve is G, the advanced control parameter J of the high-side desuperheating water regulating valve can be automatically given according to the advanced control curve of the high-side desuperheating water regulating valve of the high-side heating system and the set temperature after the desuperheater valve.
In a specific embodiment, the upper limit and the lower limit of the post-desuperheater temperature design value in the low-side heating system are 260 ℃ and 240 ℃, and 5 temperature point values are selected between 260 ℃ and 240 ℃ and are respectively 260 ℃, 255 ℃, 250 ℃, 245 ℃ and 240 ℃; the maximum value of the opening degree of the low side valve is 90%, and 5 low side valve opening degree values which are respectively 10%, 30%, 50%, 70% and 90% are selected within the range of 90% of the opening degree of the low side valve; putting into high and low side heating system, and stably operating for 30 min; adjusting the bypass valve to the opening point value of each valve, simultaneously setting the post-desuperheater temperature set value in sequence, then adjusting the opening of the desuperheater regulating valve until the system stably runs for 30min, and recording the final opening of the desuperheater regulating valve, as shown in table 2.
Table 2 shows the opening data of the desuperheating water regulating valve under the combined working condition of the opening point value of each low valve and the temperature point value.
And analyzing and processing the data in the table 2 to obtain an advanced control curve of the desuperheating water regulating valve of the low-bypass heating system, as shown in fig. 4. Curve 1, curve 2, curve 3, curve 4 and curve 5 correspond to T respectively 3a ＝260℃、T 3b ＝255℃、T 3c ＝250℃、T 3d ＝245℃、 T 3e The lead control curve of the temperature-reducing water regulating valve at 240 ℃. For example, according to FIG. 4, when the opening of the low bypass valve is 50%, the advanced control parameter J is automatically given to the low bypass desuperheater regulating valve according to the set post-desuperheater valve temperature d If the post-valve temperature of the desuperheater is set to T d At T 3a 260 ℃ and T 3b Between 255 ℃, then
From this, J can be obtained d 。
In some embodiments, the upper and lower limits of the post-desuperheater temperature design values in the high-side heating system are 290 ℃ and 270 ℃, and 5 temperature point values are selected between 290 ℃ and 270 ℃, namely 290 ℃, 285 ℃, 280 ℃, 275 ℃ and 270 ℃; the maximum value of the opening degree of the high side valve is 50%, 5 high side valve opening degree values are selected within the range of 50% of the opening degree of the high side valve, and are respectively 5%, 10%, 15%, 30% and 50%; putting into high and low side heating system, and stably operating for 30 min; adjusting the bypass valve to the opening point value of each valve, simultaneously setting the post-desuperheater temperature set value in sequence, adjusting the opening of the desuperheater regulating valve until the system stably runs for 30min, and recording the final opening of the desuperheater regulating valve, as shown in table 3.
Table 3 shows the opening data of the desuperheating water regulating valve under the combined working condition of the opening point value and the temperature point value of each high valve.
And analyzing and processing the data in the table 3 to obtain an advanced control curve of the temperature reduction water regulating valve of the high-bypass heating system, as shown in fig. 5. Curve 6, curve 7, curve 8, curve 9 and curve 10 correspond to T respectively 31 ＝290℃、T 32 ＝285℃、T 33 ＝280℃、T 34 ＝275℃、 T 35 The advanced control curve of the temperature-reducing water regulating valve at 270 ℃. For example, according to fig. 5, when the opening degree of the high-side bypass valve is 30%, the advanced control parameter J is automatically given to the high-side desuperheater regulating valve according to the set post-desuperheater valve temperature g If the post-valve temperature of the desuperheater is set to T g At T 31 290 ℃ and T 32 285 deg.C, then
From this, J can be obtained g 。
The advanced control system of the desuperheating water regulating valve of the high and low bypass heating system comprises a desuperheating water regulating valve, a bypass valve, a desuperheater and a controller. The temperature-reducing water regulating valve is arranged on the temperature-reducing water circulation pipeline, and the temperature-reducing water is used for regulating the flow of the temperature-reducing water; the bypass valve is arranged at the upstream of the desuperheater and used for adjusting the opening degree of the bypass; the temperature of the bypass steam is reduced under the action of desuperheater after the bypass steam passes through the desuperheater; the controller comprises a temperature setting module and a control module, and the temperature setting module, the desuperheating water regulating valve and the bypass valve are all electrically connected with the control module. As shown in fig. 6, in the control process, the control module of the controller obtains the opening of the bypass valve and the post-desuperheater temperature set by the temperature setting module, and controls the opening of the desuperheater regulating valve according to the advanced control curve of the desuperheater regulating valve, so that potential safety hazards caused by temperature fluctuation after desuperheater control are avoided, and meanwhile, the accuracy of calculation of the high-side valve flow and the low-side valve flow is guaranteed.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms may be directed to different embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. The advanced control method for the desuperheating water regulating valve of the high and low bypass heating system is characterized by comprising the following steps of:
obtaining an advanced control curve of the desuperheating water regulating valve of the bypass heating system through a simulation test;
and the controller controls the opening of the desuperheating water regulating valve according to the opening of the bypass valve, the set post-desuperheater temperature and the leading control curve of the desuperheating water regulating valve.
2. The method of claim 1, wherein the bypass heating system desuperheating water regulating valve lead control curve comprises a high bypass heating system desuperheating water regulating valve lead control curve and a low bypass heating system desuperheating water regulating valve lead control curve.
3. The method of claim 2, wherein the controller controls the desuperheating water regulating valve opening of the high side valve heating system according to the high bypass heating system desuperheating water regulating valve advanced control curve, and the controller controls the desuperheating water regulating valve opening of the low side valve heating system according to the low bypass heating system desuperheating water regulating valve advanced control curve.
4. The method of claim 1, wherein the controller includes a temperature setting module for setting the post-desuperheater temperature.
5. The method of claim 1, wherein the step of obtaining the lead control curve of the desuperheating water regulating valve of the bypass heating system by the simulation test comprises the following steps:
(1) selecting at least 5 temperature point values between the upper limit and the lower limit of a post-desuperheater temperature design value, and selecting at least 5 valve opening point values within the maximum valve opening range of the bypass valve;
(2) putting a high and low bypass heating system to ensure that the high and low bypass heating system stably operates;
(3) adjusting the opening degree of the bypass valve to be a certain valve opening degree value, sequentially setting the temperature behind the desuperheater to be the selected temperature value, adjusting the opening degree of the desuperheating water regulating valve until the high and low bypass heating system stably operates, and recording the opening degree data of the desuperheating water regulating valve under the working condition that the valve opening degree values and the temperature value are combined;
(4) analyzing and processing the opening data of the temperature-reducing water regulating valve under each working condition to obtain the advanced control curve of the temperature-reducing water regulating valve.
6. The method of claim 5, wherein the post-desuperheater temperature design value is determined based on a unit safe operating range.
7. The method as set forth in claim 5, wherein the bypass valve opening is a certain value, and when the set post-desuperheater temperature is between two adjacent temperature point values, the opening of the desuperheating water regulating valve under the condition of the known bypass valve opening and the set post-desuperheater temperature is determined according to the adjacent temperature point values and the corresponding opening of the desuperheating water regulating valve on the leading control curve of the desuperheating water regulating valve by the adjacent temperature point values.
8. The method of claim 5, wherein the high and low bypass heating systems are operated for a steady state operating time of 20-60 min.
9. A desuperheating water regulating valve advanced control system for a high and low bypass heating system, for implementing the method of any one of claims 1 to 8, comprising:
the desuperheating water regulating valve is used for regulating desuperheating water flow;
a bypass valve disposed upstream of the desuperheater for adjusting a bypass opening;
the controller comprises a temperature setting module and a control module, and the temperature setting module, the desuperheating water regulating valve and the bypass valve are electrically connected with the control module.
10. The system of claim 9, wherein the bypass steam is reduced in temperature by the desuperheater after passing through the desuperheater.
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|---|---|---|---|
| CN202210716654.9A CN115097730A (en) | 2022-06-23 | 2022-06-23 | Advanced control method and system for desuperheating water regulating valve of high and low bypass heating system |
| PCT/CN2023/089750 WO2023246273A1 (en) | 2022-06-23 | 2023-04-21 | Lead control method and system for desuperheating water regulating valve of bypass heat supply system |
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| CN202210716654.9A CN115097730A (en) | 2022-06-23 | 2022-06-23 | Advanced control method and system for desuperheating water regulating valve of high and low bypass heating system |
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| WO2023246273A1 (en) * | 2022-06-23 | 2023-12-28 | 西安热工研究院有限公司 | Lead control method and system for desuperheating water regulating valve of bypass heat supply system |
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| EP1288761B1 (en) * | 2001-07-31 | 2017-05-17 | General Electric Technology GmbH | Method for controlling a low pressure bypass system |
| CN111123770B (en) * | 2019-12-13 | 2021-09-24 | 山东中实易通集团有限公司 | Method and device for determining opening of bypass model under FCB working condition |
| CN111502787B (en) * | 2020-05-07 | 2022-08-16 | 西安西热节能技术有限公司 | Method for automatically controlling high side valve in high side and low side combined heat supply unit |
| CN111535879B (en) * | 2020-05-09 | 2020-11-27 | 国电南京电力试验研究有限公司 | Control method for bypass system of gas-steam combined cycle unit |
| CN111853906A (en) * | 2020-08-11 | 2020-10-30 | 西安热工研究院有限公司 | Automatic adjusting method and system for heat supply high-low pressure bypass valve of thermal power generating unit |
| CN113027550B (en) * | 2021-03-22 | 2022-08-30 | 西安热工研究院有限公司 | High-low voltage bypass system meeting peak regulation requirement and dynamic optimization control method |
| CN115097730A (en) * | 2022-06-23 | 2022-09-23 | 西安热工研究院有限公司 | Advanced control method and system for desuperheating water regulating valve of high and low bypass heating system |
-
2022
- 2022-06-23 CN CN202210716654.9A patent/CN115097730A/en active Pending
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2023
- 2023-04-21 WO PCT/CN2023/089750 patent/WO2023246273A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023246273A1 (en) * | 2022-06-23 | 2023-12-28 | 西安热工研究院有限公司 | Lead control method and system for desuperheating water regulating valve of bypass heat supply system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023246273A1 (en) | 2023-12-28 |
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