Heat supply steam extraction control valve control method and system

Abstract

The invention discloses a heat supply steam extraction control valve control method and system, and relates to the technical field of control valve control, and the method comprises the steps: monitoring the pressure data of a steam extraction pipeline in a heat supply system in real time through a pressure sensor, and obtaining a real-time heat supply demand signal from a heat user side or a heat supply network system; according to the pressure data and the heat supply demand signal, the target opening value of the extraction steam control valve is calculated; according to the target opening value, the actual opening of the extraction steam control valve is adjusted through an executing mechanism; and through a feedback mechanism, the actual opening degree of the control valve and the pressure of the steam extraction pipeline are monitored in real time, the deviation with the target opening degree is compared, and correction is conducted. By accurately monitoring the pressure of the steam extraction pipeline and the heat user requirement and combining with the optimized PID control algorithm, the adjusting precision of the opening degree of the control valve is effectively improved, the heat supply system can rapidly adapt to the requirement change, and the problem of overheating or insufficient heat supply is avoided. And meanwhile, by reducing system oscillation and steady-state errors, the operation stability of the heat supply system is remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of valve control, in particular to a heating extraction steam valve control method and system. Background Art

[0002] In recent years, with the increasing requirements for energy efficiency and the increasing pressure on environmental protection, the optimization and intelligent management of heating systems have become a hot topic of research at home and abroad. In traditional centralized heating systems, the extraction steam regulating valve, as an important device for regulating system pressure, flow and heat distribution, plays a vital role in ensuring the stability of system operation and improving heating efficiency. The traditional extraction steam regulating valve control method mainly relies on simple manual or preset adjustment, which is usually adjusted according to system experience data or manual settings. With the continuous development of information technology and automatic control technology, the extraction steam regulating valve control system based on real-time data monitoring and intelligent control has gradually become a trend of research and application. In the prior art, the automatic adjustment method based on PID control algorithm has been widely used, which can realize real-time adjustment of the regulating valve opening to meet the changing heating demand. By introducing equipment such as pressure sensors, flow meters and temperature sensors, real-time monitoring of the operating status of the heating system is realized, and the control parameters are adjusted through data feedback, which improves the automation level of the system.

[0003] Although the existing technology has made significant progress in the automatic regulation of heating systems, it still has certain limitations. First, the existing steam extraction valve control method is still insufficient in terms of regulation accuracy and system response speed when facing complex changes in heating demand. For example, under large demand fluctuations or abnormal conditions, the existing control method may fail to make accurate adjustments in time, resulting in overheating or insufficient heating of the heating system, thereby affecting user experience and energy efficiency. Secondly, although the PID control algorithm can respond to pressure changes by adjusting the opening in real time, in actual applications, the sensitivity and response ability of the traditional PID control algorithm to system disturbances are still subject to certain constraints, especially in a complex environment with dynamic changes. The parameter selection of the PID algorithm has a greater impact on the control effect and is prone to system oscillation or steady-state errors. Furthermore, the existing technology rarely comprehensively considers the real-time pressure fluctuations of the steam extraction pipeline and the specific demand signals of the heat user side and the heat network system, and lacks a comprehensive assessment and accurate response to the overall demand of the heating system. Therefore, how to further improve the flexibility and accuracy of the valve control under the premise of ensuring system stability has become an urgent problem to be solved.

[0004] Existing heating regulation technologies often have problems such as untimely response, insufficient control accuracy, and poor system stability when facing large-scale intelligent and refined management needs. In contrast, the present invention monitors the pressure data of the steam extraction pipeline in real time and accurately obtains the demand signals of the heat user side and the heat network system, combined with the PID control algorithm, which can not only dynamically adjust the opening of the steam extraction valve, but also make real-time corrections according to the actual needs of the system, thereby optimizing the heating process and ensuring the precise matching of heating capacity and efficient operation of the system. Therefore, in response to the deficiencies in the prior art, the present invention proposes an intelligent, automated, and high-precision heating extraction steam valve control method, which aims to solve the problems of delayed system response and insufficient regulation accuracy. Summary of the invention

[0005] In view of the above-mentioned problems, the present invention is proposed.

[0006] Therefore, the problem to be solved by the present invention is: how to solve the problem that the existing methods in the existing heating extraction steam valve control often have insufficient adjustment accuracy and response speed when facing large fluctuations in heating demand or abnormal conditions, resulting in frequent insufficient heating or overheating. In addition, when dealing with dynamically changing heating environments, traditional PID control algorithms are prone to cause system oscillations or steady-state errors, affecting the stability of the heating system.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a heating steam extraction regulating valve control method, comprising: monitoring the pressure data of the steam extraction pipeline in the heating system in real time through a pressure sensor, and obtaining a real-time heating demand signal from the heat user side or the heating network system; calculating the target opening value of the steam extraction regulating valve according to the pressure data and the heating demand signal; adjusting the actual opening of the steam extraction regulating valve through an actuator according to the target opening value; and monitoring the actual opening of the regulating valve and the steam extraction pipeline pressure in real time through a feedback mechanism, comparing the deviation from the target opening, and making corrections.

[0008] As a preferred solution of the heating extraction steam regulating valve control method described in the present invention, wherein: the pressure data of the extraction steam pipeline includes the inlet and outlet pressures of the extraction steam pipeline and the pressure fluctuations in the pipeline; the heating demand signal includes the demand on the heat user side and the demand on the heating network system; the demand on the heat user side includes the instant heat demand of the user obtained by installing a heat meter, including flow, temperature and heat load; the demand on the heating network system includes the overall demand obtained through the load scheduling information, flow and temperature sensor data of the heating network system.

[0009] As a preferred embodiment of the heating extraction steam regulating valve control method described in the present invention, the method comprises obtaining the real-time steam extraction pipeline outlet pressure and the heating demand signal according to the pressure data and the heating demand signal, and determining the relationship between the steam extraction pipeline outlet pressure, the heating demand signal and the target opening value; if the steam extraction pipeline outlet pressure is high, the steam flow and the heating capacity are high, and the target opening value is large, the more the regulating valve is opened, the greater the flow and pressure are; if the heating demand signal is large, the target opening value is large, the regulating valve is opened more, and if the heating demand signal is small, the target opening value is small, and the regulating valve is opened less.

[0010] As a preferred solution of the heating steam extraction valve control method described in the present invention, wherein: the calculation of the target opening value of the steam extraction valve includes using a PID control algorithm to calculate the target opening value, and by adjusting the valve opening, the outlet pressure of the steam extraction pipeline reaches the set pressure and the system is kept stable; the PID control algorithm includes a proportional part, an integral part and a differential part; the proportional part includes adjusting the target opening value based on the difference between the current steam extraction pipeline outlet pressure and the set pressure, the larger the difference, the larger the target opening value, and the more the valve opens; the integral part includes the adjustment amount of the target opening value being proportional to the accumulated amount of error; the differential part includes the adjustment amount of the target opening value being proportional to the pressure error change rate.

[0011] As a preferred embodiment of the heating steam extraction regulating valve control method described in the present invention, the calculation of the target opening value of the steam extraction regulating valve also includes calculating the error between the current steam extraction pipeline outlet pressure and the set pressure. If the error is positive, it means that the current steam extraction pipeline outlet pressure is lower than the set value. If the error is negative, it means that the current steam extraction pipeline outlet pressure is higher than the set value. According to the size of the error, the target opening value is adjusted, and the adjustment amount of the proportional part is proportional to the error. If the error is large, the regulating valve is opened greatly. If the error is small, the amplitude of the regulating valve adjustment is small. The accumulated error, that is, the time integral of the error, compensates for long-term small deviations. Through the integral term, the target opening value is gradually adjusted to reduce long-term steady-state errors. The target opening value is adjusted according to the rate of change of the steam extraction pipeline outlet pressure, that is, the rate of change of the error. If the pressure changes rapidly, the regulating valve opening is adjusted quickly to avoid system oscillations. The results of the proportional, integral and differential parts are added to obtain the final target opening value.

[0012] As a preferred embodiment of the heating steam extraction regulating valve control method described in the present invention, wherein: the actual opening of the steam extraction regulating valve is adjusted by the actuator, including a PID control algorithm outputting a target opening value, which represents the ideal opening of the regulating valve. The target opening value is a value between 0% and 100%, which represents the degree of opening of the regulating valve. A target opening value of 100% represents that the regulating valve is fully open, the flow rate is maximum, and the heating capacity is strongest. A target opening value of 0% represents that the regulating valve is fully closed, the flow rate is minimum, and the heating capacity is lowest.

[0013] As a preferred solution of the heating steam extraction valve control method described in the present invention, the feedback mechanism includes monitoring the actual opening of the valve and the pressure of the steam extraction pipeline, comparing the actual opening with the target opening value, comparing the deviation between the outlet pressure of the steam extraction pipeline and the set pressure, making corrections according to the actual opening deviation and pressure deviation, and continuously monitoring.

[0014] Another object of the present invention is to provide a system for a heating steam extraction valve control method, which can solve the heating steam extraction valve control problem by constructing a heating steam extraction valve control system.

[0015] To solve the above technical problems, the present invention provides the following technical solutions: a heating steam extraction regulating valve control system, comprising a data acquisition module, a target opening value calculation module, an adjustment module and a feedback module; the data acquisition module is used to monitor the pressure data of the steam extraction pipeline in the heating system in real time through a pressure sensor, and obtain a real-time heating demand signal from the heat user side or the heating network system; the target opening value calculation module is used to calculate the target opening value of the steam extraction regulating valve according to the pressure data and the heating demand signal; the adjustment module is used to adjust the actual opening of the steam extraction regulating valve through an actuator according to the target opening value; the feedback module is used to monitor the actual opening of the regulating valve and the pressure of the steam extraction pipeline in real time through a feedback mechanism, compare the deviation from the target opening, and make corrections.

[0016] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the heating extraction steam valve control method as described above when executing the computer program.

[0017] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the heating extraction steam valve control method as described above.

[0018] The beneficial effects of the present invention are as follows: the heating extraction steam valve control method provided by the present invention effectively improves the adjustment accuracy of the valve opening by accurately monitoring the pressure of the extraction steam pipeline and the heat user demand, combined with the optimized PID control algorithm, so that the heating system can quickly adapt to changes in demand and avoid overheating or insufficient heating. At the same time, by reducing system oscillations and steady-state errors, the present invention significantly improves the operating stability of the heating system, further optimizes the heating process, and ensures the improvement of heating efficiency and the effective use of energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0020] Figure 1 This is a flow chart of a heating extraction steam valve control method provided in the first embodiment of the present invention.

[0021] Figure 2 This is a structural diagram of a heating extraction steam valve control system provided in the second embodiment of the present invention. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] Example 1

[0025] Reference Figure 1 , which is the first embodiment of the present invention, provides a heating steam extraction regulating valve control method, including: monitoring the pressure data of the steam extraction pipeline in the heating system in real time through a pressure sensor, and obtaining a real-time heating demand signal from the heat user side or the heating network system; calculating the target opening value of the steam extraction regulating valve according to the pressure data and the heating demand signal; adjusting the actual opening of the steam extraction regulating valve through an actuator according to the target opening value; and monitoring the actual opening of the regulating valve and the steam extraction pipeline pressure in real time through a feedback mechanism, comparing the deviation from the target opening, and making corrections.

[0026] S1. Use pressure sensors to monitor the pressure data of the steam extraction pipeline in the heating system in real time, and obtain real-time heating demand signals from the heat user side or the heat network system.

[0027] The pressure sensor is used to monitor the pressure data of the steam extraction pipeline in the heating system in real time to ensure that it is within the preset working range, obtain real-time heating demand signals from the heat user side or the heat network system, and reflect the changes in the current heat load demand.

[0028] The pressure data of the extraction steam pipeline includes the inlet and outlet pressures of the extraction steam pipeline and the pressure fluctuations in the pipeline; the heating demand signal includes the demand on the heat user side and the demand on the heating network system; the demand on the heat user side includes the immediate heat demand of the user obtained by installing a heat meter, including flow, temperature and heat load; the demand on the heating network system includes the overall demand obtained through the load scheduling information, flow and temperature sensor data of the heating network system.

[0029] S2. Calculate the target opening value of the steam extraction valve according to the pressure data and the heating demand signal.

[0030] According to the extraction steam pressure and heating demand signal, the target opening value of the extraction steam regulating valve is calculated to meet the needs of the heating system.

[0031] The real-time steam extraction pipeline outlet pressure and heating demand signal are obtained, and the relationship between the steam extraction pipeline outlet pressure and heating demand signal and the target opening value is determined.

[0032] The higher the outlet pressure of the extraction steam pipe is, the higher the steam flow and heating capacity will be. The larger the target opening value is, the more the regulating valve is opened, the greater the flow and pressure will be.

[0033] The outlet pressure of the steam extraction pipeline reflects the pressure condition between the heat source end and the heating network. Generally, the higher the outlet pressure of the steam extraction pipeline, the stronger the steam flow and heating capacity. The opening of the regulating valve directly affects the flow and pressure. Therefore, according to the relationship between the outlet pressure of the steam extraction pipeline and the heating demand, the target opening value of the regulating valve can be calculated. The larger the target opening value, the more the regulating valve is opened, the greater the flow and pressure, and vice versa.

[0034] If the heating demand signal is large, the target opening value is large and the regulating valve is opened more. If the heating demand signal is small, the target opening value is small and the regulating valve is opened less.

[0035] The heating demand signal usually reflects the demand for heat supply by the heating network system or heat users. When the demand signal is large, the valve needs to be opened wider to increase the flow and heating capacity; when the demand is small, the valve should be closed appropriately to reduce energy waste and reduce system pressure.

[0036] The target opening value is calculated using the PID control algorithm. By adjusting the valve opening, the outlet pressure of the extraction pipeline reaches the set pressure and the system is kept stable. The PID control algorithm includes proportional part, integral part and differential part.

[0037] The proportional part includes adjusting the target opening value based on the difference between the current steam extraction pipeline outlet pressure and the set pressure. The larger the difference, the larger the target opening value and the more the regulating valve is opened.

[0038] The change in the target opening value is proportional to the current pressure error. For example, if the actual pressure is lower than the target pressure, the target opening value should be increased; if the actual pressure is higher than the target pressure, the target opening value should be decreased.

[0039] The integral part includes the adjustment amount of the target opening value which is proportional to the accumulated amount of error (integral over time); in this way, some long-term deviations can be compensated so that the system eventually reaches the set steam extraction pipeline outlet pressure.

[0040] The integral control part is used to eliminate small errors that exist in the system for a long time. Even if the system error is small, if it persists, the integral term will accumulate the error and adjust the target opening to prevent the system from deviating from the target state for a long time.

[0041] The differential part includes the adjustment amount of the target opening value which is proportional to the pressure error change rate. The faster the pressure changes, the greater the adjustment range of the target opening value, which helps to correct the fluctuation of the system in advance.

[0042] The differential control part is used to respond to the rate of change of the pressure at the outlet of the extraction pipeline. It predicts the pressure change trend by calculating the speed of pressure change, so as to make advance adjustments. The differential part helps to reduce overshoot or oscillation caused by pressure changes.

[0043] The error between the current steam extraction pipeline outlet pressure and the set pressure is calculated. If the error is positive, it means that the current steam extraction pipeline outlet pressure is lower than the set value. If the error is negative, it means that the current steam extraction pipeline outlet pressure is higher than the set value.

[0044] According to the size of the error, the target opening value is adjusted. The adjustment amount of the proportional part is proportional to the error. If the error is large, the throttle valve is opened greatly. If the error is small, the throttle valve is adjusted by a small amount.

[0045] The cumulative error is the time integral of the error, which compensates for long-term small deviations. Through the integral term, the target opening value is gradually adjusted to reduce the long-term steady-state error.

[0046] The target opening value is adjusted according to the rate of change of the steam extraction pipeline outlet pressure, that is, the rate of change of the error. If the pressure changes rapidly (for example, when the load changes suddenly), the valve opening is adjusted quickly to avoid system oscillation.

[0047] Add the results of the proportional, integral and differential parts to get the final target opening value.

[0048] S3. According to the target opening value, the actual opening of the steam extraction regulating valve is adjusted through the actuator.

[0049] According to the target opening value, the actual opening of the extraction steam regulating valve is adjusted through the actuator to ensure that the heating system operates under stable working conditions.

[0050] The PID control algorithm outputs a target opening value, which represents the ideal opening of the throttle valve. The target opening value is a value between 0% and 100%, which represents the degree of opening of the throttle valve. A target opening value of 100% means that the throttle valve is fully open, with the maximum flow and the strongest heating capacity. A target opening value of 0% means that the throttle valve is fully closed, with the minimum flow and the lowest heating capacity.

[0051] Through the adjustment of the three parts of proportion, integration and differentiation, the PID control algorithm can dynamically calculate the target opening value of the extraction steam regulating valve according to the changes in the outlet pressure of the extraction steam pipeline and the heating demand signal. This control method can adjust the pressure and flow of the heating system in real time, ensure that the system maintains stable operation under various load changes, and minimize errors and overshoot.

[0052] S4. Through the feedback mechanism, the actual opening of the regulating valve and the pressure of the steam extraction pipeline are monitored in real time, the deviation from the target opening is compared, and corrections are made.

[0053] Through the feedback mechanism, the actual opening of the regulating valve and the pressure of the steam extraction pipeline are monitored in real time, the deviation from the target opening is compared, and corrections are made to ensure the stability of the system and the matching of the heat load.

[0054] Monitor the actual opening of the regulating valve and the pressure of the steam extraction pipeline, compare the actual opening with the target opening value, compare the deviation between the outlet pressure of the steam extraction pipeline and the set pressure, make corrections based on the actual opening deviation and pressure deviation, and monitor continuously.

[0055] Monitoring the actual opening of the valve: The actual opening of the valve is obtained through feedback from the actuator. The actuator (such as an electric or pneumatic valve actuator) is usually equipped with a position sensor that can provide feedback on the actual opening of the valve. The control system can use these feedback signals to monitor in real time whether the valve is opened or closed according to the set target opening.

[0056] Monitoring the pressure of the steam extraction pipeline: The system also needs to monitor the pressure of the steam extraction pipeline in real time, especially the pressure at the pipeline outlet. This is because the steam extraction pressure directly affects the output capacity of the heating system and the heat transfer efficiency. The pressure sensor is installed at the key position of the pipeline to feedback the current pressure data.

[0057] Compare the actual opening with the target opening: The system compares the difference between the actual opening and the target opening. The target opening is the ideal opening value calculated based on the heating demand, while the actual opening is the current opening value fed back by the actuator. If there is a difference between the two, it means that the valve is not adjusted completely according to the demand.

[0058] Compare the deviation between the extraction pressure and the target pressure: Similarly, the system will also compare the difference between the actual extraction pressure and the target pressure. The target pressure is usually the expected value calculated based on the heating demand and system operating conditions, while the actual pressure is the current pressure value fed back by the pressure sensor. If the difference between the two is large, it means that the heating capacity has not yet reached the expected level.

[0059] Correction based on actual opening deviation: If the system detects a deviation between the target opening and the actual opening, the control system will adjust the valve according to the size of the deviation. For example, if the actual opening is less than the target opening, it means that the valve is not fully opened, and the system will instruct the actuator to increase the opening; conversely, if the actual opening is greater than the target opening, the system will instruct the actuator to reduce the opening.

[0060] Correction based on extraction pressure deviation: If there is a deviation between the actual pressure and the target pressure, the system will adjust the valve opening according to the pressure deviation. Usually, when the actual pressure is low, it means that the heat provided by the system is insufficient, and the control system will increase the flow and pressure by increasing the valve opening; when the actual pressure is high, the system will reduce the flow and pressure by reducing the valve opening to avoid excessive heat supply.

[0061] When the deviation between the actual opening and the extraction pressure is corrected, the opening of the regulating valve will be adjusted to the new target opening value. Since there may be a certain lag between the response of the regulating valve and the pressure change of the system, the system will continuously recalculate the target opening according to the new feedback data in each control cycle and make corrections. In this way, the system can be flexibly adjusted according to the real-time heating demand and pressure status.

[0062] Closed-loop control: The whole process constitutes a closed-loop control system. After each correction, the system monitors the new actual opening and extraction pressure values ​​in real time and compares them with the target values. In this way, the system can automatically adjust and maintain the balance between the target opening and target pressure to ensure that the heating system is always in the best operating state.

[0063] Limit control: In actual applications, the opening of the throttle valve usually has an upper limit and a lower limit, that is, the opening will not increase or decrease indefinitely. Therefore, when correcting the opening, the system will set a maximum and minimum opening range to ensure that the throttle valve opening does not exceed the actual control range, thereby preventing over-adjustment.

[0064] Lag compensation: Since there is a certain lag in the response time of the valve and the change in system pressure, the feedback mechanism may introduce a lag compensation strategy, that is, taking these lag factors into account when adjusting the opening to avoid system oscillations caused by over-adjustment or slow response.

[0065] Example 2

[0066] Reference Figure 2 , which is the second embodiment of the present invention, is different from the previous embodiment in that it provides a heating extraction steam valve control system, including: a data acquisition module 100, a target opening value calculation module 200, an adjustment module 300 and a feedback module 400.

[0067] The data acquisition module 100 is used to monitor the pressure data of the steam extraction pipeline in the heating system in real time through a pressure sensor, and obtain a real-time heating demand signal from the heat user side or the heat network system.

[0068] The target opening value calculation module 200 is used to calculate the target opening value of the extraction steam regulating valve according to the pressure data and the heating demand signal.

[0069] The adjustment module 300 is used to adjust the actual opening of the extraction steam regulating valve through the actuator according to the target opening value.

[0070] The feedback module 400 is used to monitor the actual opening of the regulating valve and the pressure of the steam extraction pipeline in real time through a feedback mechanism, compare the deviation from the target opening, and make corrections.

[0071] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0072] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0073] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0074] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0075] Embodiment 3 is the third embodiment of the present invention. It is different from the first two embodiments in that it is used to verify the technical effects adopted in the present invention so as to verify the real effects of the method.

[0076] Traditional PID control methods rely on fixed PID parameters (proportional, integral, differential), which are difficult to flexibly adjust when facing large fluctuations in heating demand, resulting in slow regulation response, prone to overheating or insufficient heating, and large system oscillations and steady-state errors. Since the control parameters are not dynamically adjusted with environmental changes, the traditional PID control method has poor adaptability to the system, which may affect the stability of the system and even lead to energy waste.

[0077] The method of the present invention and the traditional method are used for simultaneous detection.

[0078] This embodiment uses the traditional method and the method of the present invention to perform detection simultaneously, and the detection comparison results are shown in the following Table 1:

[0079] Table 1 Comparison table between traditional method and method of the present invention

[0080] index Traditional methods Method of the present invention Response speed (seconds) 60 30 Adjustment accuracy (% error) ±15％ ±2％ Frequency of overheating or insufficient heating Frequent (2-3 times a month) Rarely (1-2 times per year) System shock frequency (times / month) 3 0 Steady state error (%) ±10％ ±3％ Energy efficiency (%) 85％ 92％ Equipment maintenance times (times / year) 6 2

[0081] The present invention significantly improves the adjustment accuracy and response speed of the heating extraction steam valve control system by introducing an optimized PID control algorithm and real-time data monitoring technology, and effectively solves the shortcomings of the traditional method in the face of fluctuations in heating demand or abnormal conditions. Compared with the traditional PID control method, the present invention not only reduces the problems of overheating and insufficient heating, but also significantly reduces system oscillation and steady-state errors, improves the stability and energy utilization efficiency of the heating system, and ensures the efficient operation and optimization of the heating process.

[0082] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A heating extraction steam valve control method, characterized in that: include, The pressure sensor is used to monitor the pressure data of the steam extraction pipeline in the heating system in real time, and obtain the real-time heating demand signal from the heat user side or the heat network system; Calculate the target opening value of the extraction steam regulating valve according to the pressure data and the heating demand signal; According to the target opening value, the actual opening of the extraction steam regulating valve is adjusted through the actuator; Through the feedback mechanism, the actual opening of the regulating valve and the pressure of the steam extraction pipeline are monitored in real time, the deviation from the target opening is compared, and corrections are made.

2. The heating extraction steam valve control method according to claim 1, characterized in that: The pressure data of the steam extraction pipeline includes the inlet and outlet pressures of the steam extraction pipeline and the pressure fluctuation in the pipeline; The heating demand signal includes heat user side demand and heat network system demand; The heat user-side demand includes obtaining the user's immediate heat demand by installing a heat meter, including flow, temperature and heat load; The heating network system demand includes the overall demand obtained through load dispatch information, flow rate, and temperature sensor data of the heating network system.

3. The heating extraction steam valve control method according to claim 2, characterized in that: The step of obtaining the real-time steam extraction pipeline outlet pressure and the heat demand signal according to the pressure data and the heat demand signal, and determining the relationship between the steam extraction pipeline outlet pressure and the heat demand signal and the target opening value; The higher the outlet pressure of the steam extraction pipeline, the higher the steam flow and heating capacity, and the larger the target opening value. The more the regulating valve is opened, the greater the flow and pressure. If the heating demand signal is large, the target opening value is large and the regulating valve is opened more. If the heating demand signal is small, the target opening value is small and the regulating valve is opened less.

4. The heating extraction steam valve control method according to claim 3, characterized in that: The calculation of the target opening value of the steam extraction regulating valve includes using a PID control algorithm to calculate the target opening value, and adjusting the regulating valve opening so that the outlet pressure of the steam extraction pipeline reaches the set pressure and the system is kept stable; The PID control algorithm includes a proportional part, an integral part and a differential part; The proportional part includes adjusting the target opening value based on the difference between the current steam extraction pipeline outlet pressure and the set pressure. The larger the difference, the larger the target opening value and the more the regulating valve is opened; The integral part includes an adjustment amount of the target opening value which is proportional to the accumulated amount of the error; The differential part includes an adjustment amount of the target opening value which is proportional to the pressure error change rate.

5. The heating extraction steam valve control method according to claim 4, characterized in that: The calculation of the target opening value of the steam extraction regulating valve also includes calculating the error between the current steam extraction pipeline outlet pressure and the set pressure. If the error is positive, it means that the current steam extraction pipeline outlet pressure is lower than the set value. If the error is negative, it means that the current steam extraction pipeline outlet pressure is higher than the set value. According to the size of the error, adjust the target opening value. The adjustment amount of the proportional part is proportional to the error. If the error is large, the throttle valve is opened greatly. If the error is small, the throttle valve is adjusted to a small extent. The cumulative error is the time integral of the error, which compensates for long-term small deviations. Through the integral term, the target opening value is gradually adjusted to reduce the long-term steady-state error. Adjust the target opening value according to the rate of change of the outlet pressure of the steam extraction pipeline, that is, the rate of change of the error. If the pressure changes quickly, adjust the valve opening quickly to avoid system shock. Add the results of the proportional, integral and differential parts to get the final target opening value.

6. The heating extraction steam valve control method according to claim 5, characterized in that: The actual opening of the extraction steam regulating valve is adjusted by the actuator, including a PID control algorithm outputting a target opening value, which indicates the ideal opening of the regulating valve. The target opening value is a value between 0% and 100%, which indicates the degree of opening of the regulating valve. A target opening value of 100% indicates that the regulating valve is fully opened, the flow rate is maximum, and the heating capacity is strongest. A target opening value of 0% indicates that the regulating valve is fully closed, the flow rate is minimum, and the heating capacity is lowest.

7. The heating extraction steam valve control method according to claim 6, characterized in that: The feedback mechanism includes monitoring the actual opening of the regulating valve and the pressure of the steam extraction pipeline, comparing the actual opening with the target opening value, comparing the deviation between the outlet pressure of the steam extraction pipeline and the set pressure, making corrections based on the actual opening deviation and pressure deviation, and continuously monitoring.

8. A system using the heating extraction steam valve control method according to any one of claims 1 to 7, characterized in that: It comprises a data acquisition module (100), a target opening value calculation module (200), an adjustment module (300) and a feedback module (400); The data acquisition module (100) is used to monitor the pressure data of the steam extraction pipeline in the heating system in real time through a pressure sensor, and obtain a real-time heating demand signal from the heat user side or the heat network system; The target opening value calculation module (200) is used to calculate the target opening value of the extraction steam regulating valve according to the pressure data and the heating demand signal; The adjustment module (300) is used to adjust the actual opening of the extraction steam regulating valve through an actuator according to the target opening value; The feedback module (400) is used to monitor the actual opening of the regulating valve and the pressure of the steam extraction pipeline in real time through a feedback mechanism, compare the deviation from the target opening, and make corrections.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the heating extraction steam valve adjustment control method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the heating extraction steam valve adjustment control method according to any one of claims 1 to 7 are implemented.

Images