Application of water supply main and bypass switching control method in unit wide-load peak regulation

Abstract

The invention discloses an application of a water supply main and bypass switching control method in unit wide load peak regulation, which comprises the following steps: step 1, load monitoring and prediction: monitoring unit load change in real time, collecting historical load data, and utilizing an advanced prediction algorithm to predict future load of a unit; the load change of a unit is monitored in real time, the future load is predicted, the water supply system is adjusted in advance, stable operation of the unit is ensured, the optimal switching strategy is intelligently selected according to the performance characteristics of the main and bypass water supply system and the current operation condition of the unit, and the switching efficiency is improved; smooth switching between the main path and the bypass path is achieved, fluctuation and loss in the switching process are reduced, the water supply system is optimized and adjusted in real time after switching is completed, efficient and stable operation of a unit in the wide-load peak shaving process is ensured, the water supply system can effectively switch the water supply main path and the bypass path, and the water supply efficiency is improved. And the generator set can stably operate in the wide-load peak regulation operation.

Description

Technical Field

[0001] The invention relates to the technical field of automatic control of thermal power generating sets, and in particular to an application of a water supply main bypass switching control method in wide load peak regulation of a generating set. Background Art

[0002] A thermal power generating unit uses coal, oil or combustible gas as fuel to heat the water in the boiler, increase its temperature and convert it into high-pressure steam, and then use the steam with a certain pressure to drive the turbine to generate electricity. Its main components include a coal-fired boiler, a steam turbine generator unit, a power distribution system and auxiliary equipment. The basic principle of thermal power generation is to heat the water in the boiler through the combustion of coal, oil, natural gas and other fuels, increase the water temperature and convert it into high-pressure steam. The steam is transported to the steam turbine unit through a pipeline, and the pressure generated drives the coaxial generator of the steam turbine to rotate to generate electricity.

[0003] In modern power systems, generator sets need to be able to operate stably under various load conditions, especially in wide load peak-shaving operations. The flexibility of the water supply system, as a key link in the thermal cycle, directly affects the response speed and efficiency of the unit. How to effectively switch the main water supply line and bypass to ensure the safe and stable operation of the unit has become a technical challenge. Summary of the invention

[0004] To this end, the present invention provides a water supply main bypass switching control method for application in unit wide load peak regulation to solve the above-mentioned problems in the prior art.

[0005] In order to achieve the above object, the present invention provides the following technical solution: an application of a water supply main bypass switching control method in unit wide load peak regulation, comprising:

[0006] Step 1: Load monitoring and forecasting: real-time monitoring of unit load changes and collection of historical load

[0007] Load data, using advanced prediction algorithms to predict the future load of the unit;

[0008] Step 2: Calculate the feedwater flow demand. According to the load forecast results of the unit, analyze the load change trend and amplitude. According to the load change forecast, adjust the reference feedwater flow value. Consider the impact of steam pressure, steam temperature, feedwater temperature, and feedwater pressure on the feedwater flow demand. Combined with the unit operation

[0009] Parameters are set to calculate the demand value of water supply flow;

[0010] Step 3: Main bypass switching decision, including:

[0011] 301. Status detection: Real-time detection of the working status of the main water supply system, including flow rate, pressure

[0012] force, temperature;

[0013] 302. Demand judgment: Determine whether the main water supply system can meet the water supply flow rate under the current load

[0014] need;

[0015] 303. Bypass start: If the main water supply cannot meet the demand, the bypass water supply system will be started and

[0016] Calculate the water flow rate required for the bypass;

[0017] 304. Determination of switching strategy: Based on the performance characteristics of the main bypass water supply system and the current unit operation

[0018] The optimal switching strategy is selected according to the operation status;

[0019] Step 4: Main bypass switching is executed. According to the switching strategy, the main and bypass water supply are automatically adjusted.

[0020] The system's electric door and regulating valve enable smooth switching between the main and bypass circuits;

[0021] Step 5: Optimize and adjust after switching. According to the evaluation results, fine-tune the water supply flow and pressure parameters to ensure efficient and stable operation of the unit during wide load peak regulation.

[0022] Furthermore, load monitoring and forecasting are specifically as follows:

[0023] Load monitoring: The sensors installed on the generator set collect and record the load change data of the unit in real time;

[0024] Load forecasting: Collect historical load data and data on related factors that may affect load changes, clean the data, remove outliers and missing values, standardize the data, select features that are closely related to load changes, select appropriate prediction algorithms based on data characteristics, use historical data to train prediction models, adjust parameters to optimize prediction results, use independent historical data to verify the model's prediction ability, and use the verified model to predict future loads.

[0025] Furthermore, the water flow demand calculation is as follows:

[0026] Demand calculation: Based on the predicted results of the unit load and combined with other operating parameters, the demand value of the water flow rate is calculated through a mathematical formula. The formula is:

[0027] Q w =a·P+b·T+c·D+d

[0028] Where: Q wis the feedwater flow rate, P is the unit load forecast result, T is the current steam temperature, D is the fuel consumption rate, and a, b, c, d are coefficients obtained based on experience and historical data analysis;

[0029] Optimization and adjustment: Taking into account the safe operation restrictions of the unit, the calculated water supply flow demand value is optimized and adjusted, including: determining the safe operation restrictions, clarifying the safe operation range of the water supply flow, and understanding the restrictive conditions that the unit may encounter during operation. Check the calculated value: Compare the calculated water supply flow demand value with the safe operation range of the unit to check whether it exceeds the limit. Adjust the proportional coefficient: If the calculated value is generally too high or too low, the proportional coefficient can be appropriately adjusted to make it closer to the actual operation data. Consider other parameters: If the operation of the unit is also affected by other parameters, these parameters can be included in the calculation model for more accurate predictions. Set a safety threshold: In order to ensure the safe operation of the unit, a certain safety threshold can be set based on the calculated water supply flow demand value.

[0030] Furthermore, status detection includes: the system will detect the working status of the main water supply system in real time, which includes the monitoring of key parameters of water supply flow, pressure and temperature. These parameters are important bases for evaluating the current operating status of the main water supply system.

[0031] Furthermore, demand determination includes: after obtaining the real-time working status of the main water supply system, determining whether the main water supply flow demand can meet the current load.

[0032] Furthermore, the bypass start-up includes: the bypass water supply system is usually used as a backup or supplement to the main line, providing the necessary water supply flow when the main line fails or cannot meet the demand. Before starting the bypass system, the system needs to calculate the water supply flow required by the bypass to ensure that it can meet the actual needs of the unit; the specific calculation formula is:

[0033] Q w-bypass =f(P,T,F main ,D load )

[0034] Where: Q w-bypass is the feedwater flow required for bypass, P is the main steam pressure, T is the main steam temperature, F main is the main steam flow rate, D load is the unit load, and f(·) is a function that describes the relationship between variables.

[0035] Furthermore, the switching strategy is determined, including: selecting a better switching strategy according to the performance characteristics of the main bypass water supply system and the current unit operation status, wherein the logical formula of the switching decision can be expressed as:

[0036]

[0037] Among them, D main Represents the current main water supply flow, D req represents the required water flow rate, Status_M represents whether the current unit operation status is "normal", D main <D req Indicates that the current main water supply flow is insufficient to meet demand. If Status_□= ′ normal ′ And D main ≥D req , it decides to keep the main line running. In other cases, such as Status_M is abnormal or D main <D req , it decides to switch to bypass operation.

[0038] Further, the main bypass switching is performed, including:

[0039] Equipment adjustment: According to the switching strategy, the electric gates and regulating valves of the main and bypass water supply systems are automatically adjusted to achieve smooth switching between the main and bypass. First, the system needs to detect the current status of the main and bypass water supply systems, including the position and opening of the electric gates and regulating valves, as well as the flow and pressure of the system, to confirm the current operating status and water supply demand of the unit. According to the aforementioned switching strategy logic expression, it is determined whether to keep the main route or switch to the bypass. If it is decided to switch to the bypass, go to the next step. Before switching to the bypass, ensure that the bypass water supply system is in an operational state, the power supply of the electric gate and regulating valve is connected, and the operating state is normal. According to the current demand flow of the unit, the system is pre-set. First, calculate and set the opening of the bypass regulating valve to ensure that the water supply demand of the unit can be met after the switch. If the main line is currently supplying water, it is necessary to gradually reduce the opening of the main regulating valve to reduce the water supply of the main line, and at the same time monitor whether the water supply demand of the unit is met. When the opening of the main regulating valve is reduced to a certain extent and the water supply demand of the unit is still met, start to gradually open the bypass electric door and regulating valve. In this process, it is necessary to monitor the flow and pressure of the bypass to ensure that they gradually increase to a level that meets the needs of the unit. When the bypass completely takes over the water supply, it is necessary to monitor for a period of time to ensure that the water supply demand of the unit is met and the operation status of the bypass system is stable;

[0040] Parameter monitoring: During the switching process, monitor the changes in water supply flow and pressure parameters in real time to ensure the safety and stability of the switching process. Specifically, set flow and pressure monitoring points at key locations of the main and bypass water supply systems, select appropriate sensors, and ensure that these sensors can accurately and in real time monitor changes in flow and pressure, connect the sensors to the monitoring system, ensure that the sensors can transmit monitoring data to the monitoring system in real time, configure the monitoring system, set the corresponding sampling frequency and data storage method, and during the switching process, the monitoring system should continue to receive flow and pressure data from the sensors, and display and record them in real time.

[0041] Further optimization and adjustment after switching include:

[0042] Status monitoring: After the switch is completed, the operating status of the main bypass water supply system is monitored in real time; Performance evaluation: Based on the monitoring results, the system performance is evaluated, including: collecting key performance data from the monitoring system, such as water supply flow, pressure parameters, and response time, clarifying the performance indicators to be evaluated, such as flow stability, pressure fluctuation range, and response time, analyzing the collected data, evaluating whether the performance indicators meet the preset standards or business requirements, and comparing the current performance data with the benchmark data;

[0043] Parameter fine-tuning: Based on the evaluation results, fine-tune the water supply flow and pressure parameters to ensure efficient and stable operation of the unit during wide load peak regulation, including: carefully analyze the water supply flow and pressure data obtained from status monitoring, compare the data before and after switching, identify possible performance bottlenecks or optimization space, set clear fine-tuning goals based on the analysis results, and formulate a detailed fine-tuning plan, including adjustment parameters, adjustment direction, and expected adjustment range. According to the fine-tuning plan, gradually adjust the water supply flow and pressure. During the fine-tuning process, continuously monitor the system's operating status and parameter changes, and make necessary adjustments and optimizations to the fine-tuning plan based on real-time feedback.

[0044] The present invention has the following advantages:

[0045] The present invention monitors the load changes of the unit in real time and predicts the future load, adjusts the water supply system in advance to ensure the stable operation of the unit, and intelligently selects the best switching strategy according to the performance characteristics of the main bypass water supply system and the current operation status of the unit to improve the switching efficiency. By automatically adjusting the electric door, regulating valve and other equipment, the smooth switching between the main and bypass is achieved to reduce the fluctuation and loss in the switching process. After the switching is completed, the water supply system is optimized and adjusted in real time to ensure the efficient and stable operation of the unit in the wide load peak regulation process, so that the water supply system can effectively switch the water supply main and bypass, and the generator set can operate stably in the wide load peak regulation operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a flow chart of the application of a water supply main bypass switching control method of the present invention in the wide load peak regulation of the unit;

[0047] Figure 2 This is a flow chart of step 3, main bypass switching decision, in the application of a water supply main bypass switching control method of the present invention in the wide load peak regulation of the unit;

[0048] Figure 3 This is one of the logic diagrams of the application of a water supply main bypass switching control method in the wide load peak regulation of the unit according to the present invention;

[0049] Figure 4 This is the second logic diagram of the application of a water supply main bypass switching control method in the wide load peak regulation of the unit according to the present invention;

[0050] Figure 5 The third logic diagram of the application of a water supply main bypass switching control method in the wide load peak regulation of the unit according to the present invention;

[0051] Figure 6 This is the fourth logic diagram of the application of a water supply main bypass switching control method in the wide load peak regulation of the unit according to the present invention;

[0052] Figure 7 This is the fifth logic diagram of the application of a water supply main bypass switching control method in the wide load peak regulation of the unit according to the present invention. DETAILED DESCRIPTION

[0053] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] like Figures 1 to 7 As shown, the application of a water supply main bypass switching control method in the first aspect of the present invention in the wide load peak regulation of the unit includes:

[0055] Step 1: Load monitoring and prediction: real-time monitoring of unit load changes, collection of historical load data, and use of advanced prediction algorithms to predict future unit loads;

[0056] Step 2: Calculate the feedwater flow demand. According to the load forecast results of the unit, analyze the load change trend and amplitude. According to the load change forecast, adjust the reference feedwater flow value. Consider the impact of steam pressure, steam temperature, feedwater temperature, and feedwater pressure on the feedwater flow demand. Combined with the unit operating parameters, calculate the feedwater flow demand value.

[0057] Step 3: Main bypass switching decision, including:

[0058] 301. Status detection: Real-time detection of the working status of the main water supply system, including flow, pressure and temperature;

[0059] 302. Demand judgment: judge whether the main water supply system meets the water supply flow demand under the current load;

[0060] 303. Bypass start: If the main water supply cannot meet the demand, the bypass water supply system is started and the water supply flow required by the bypass is calculated;

[0061] 304. Determine the switching strategy: select the optimal switching strategy based on the performance characteristics of the main bypass water supply system and the current unit operating conditions;

[0062] Step 4: The main bypass switching is executed. According to the switching strategy, the electric gates and regulating valves of the main and bypass water supply systems are automatically adjusted to achieve smooth switching between the main and bypass systems.

[0063] Step 5: Optimize and adjust after switching. According to the evaluation results, fine-tune the water supply flow and pressure parameters to ensure efficient and stable operation of the unit during wide load peak regulation.

[0064] In this embodiment, by real-time monitoring of unit load changes and predicting future loads, the water supply system is adjusted in advance to ensure stable operation of the unit. According to the performance characteristics of the main bypass water supply system and the current unit operating conditions, the best switching strategy is intelligently selected to improve switching efficiency. By automatically adjusting electric doors, regulating valves and other equipment, smooth switching between the main and bypass is achieved to reduce fluctuations and losses during the switching process. After the switching is completed, the water supply system is optimized and adjusted in real time to ensure efficient and stable operation of the unit during wide load peak regulation, so that the water supply system can effectively switch the main water supply and bypass, and the generator set can operate stably during wide load peak regulation operations.

[0065] Load monitoring and forecasting are as follows:

[0066] Load monitoring: The sensors installed on the generator set collect and record the load change data of the unit in real time;

[0067] Load forecasting: Collect historical load data and data on related factors that may affect load changes, clean the data, remove outliers and missing values, standardize the data, select features that are closely related to load changes, select appropriate prediction algorithms based on data characteristics, use historical data to train prediction models, adjust parameters to optimize prediction results, use independent historical data to verify the model's prediction ability, and use the verified model to predict future loads.

[0068] In this embodiment, load monitoring is an important part of the unit operation process, and its purpose is to track and record the load changes of the unit in real time, which is usually achieved by various sensors installed on the generator set, such as power sensors, voltage sensors, current sensors, etc. These sensors can continuously collect and transmit data reflecting the operating status of the unit, such as real-time power output, voltage and current, etc. These data are crucial for understanding the operating status of the unit and judging whether the unit is in a safe and efficient operating state. Load forecasting is based on load monitoring, using the collected historical load data, combined with mathematical statistical methods and machine learning algorithms, to predict the load of the unit in the future. The purpose of load forecasting is to predict the load changes that the unit may face in advance, so that the system can be prepared in advance, optimize resource allocation, and improve the operating efficiency and safety of the unit. The accuracy of load forecasting is of great significance to the economic operation and stability of the unit.

[0069] The water flow demand calculation is as follows:

[0070] Demand calculation: Based on the predicted results of the unit load and combined with other operating parameters, the demand value of the water flow rate is calculated through a mathematical formula. The formula is:

[0071] Q w =a·P+b·T+c·D+d

[0072] Where: Q w is the feedwater flow rate, P is the unit load forecast result, T is the current steam temperature, D is the fuel consumption rate, and a, b, c, d are coefficients obtained based on experience and historical data analysis;

[0073] Optimization and adjustment: Taking into account the safe operation restrictions of the unit, the calculated water supply flow demand value is optimized and adjusted, including: determining the safe operation restrictions, clarifying the safe operation range of the water supply flow, and understanding the restrictive conditions that the unit may encounter during operation. Check the calculated value: Compare the calculated water supply flow demand value with the safe operation range of the unit to check whether it exceeds the limit. Adjust the proportional coefficient: If the calculated value is generally too high or too low, the proportional coefficient can be appropriately adjusted to make it closer to the actual operation data. Consider other parameters: If the operation of the unit is also affected by other parameters, these parameters can be included in the calculation model for more accurate predictions. Set a safety threshold: In order to ensure the safe operation of the unit, a certain safety threshold can be set based on the calculated water supply flow demand value.

[0074] In this embodiment, during the operation of the thermal power generating unit, the feedwater flow rate is an important factor to ensure the normal operation of the water cycle in the steam generator. The feedwater flow rate demand calculation is based on the unit load prediction results and other key operating parameters of the unit, and is determined by a specific mathematical model or empirical formula. Using the design parameters and operating experience of the unit, a mathematical model or empirical formula can be established to link the steam generation amount with the feedwater flow rate. This model or formula will take into account a variety of factors, such as the thermal efficiency of the steam generator, fuel characteristics, water cycle efficiency, etc. By inputting the predicted load value and other relevant unit operating parameters, the feedwater flow rate required by the unit under a given load can be calculated. The calculated feedwater flow rate demand value is a theoretical value, but in actual applications, the safe operation limits of the unit also need to be considered. These limits may include the maximum allowable pressure, temperature, and capacity of the feedwater pump. If the calculated feedwater flow rate demand value exceeds the safe operation limit of the unit, it needs to be optimized and adjusted.

[0075] Status detection, including: the system will detect the working status of the main water supply system in real time, including the monitoring of key parameters such as water flow, pressure and temperature. These parameters are important bases for evaluating the current operating status of the main water supply system.

[0076] Demand judgment includes: after obtaining the real-time working status of the main water supply system, judging whether the main water supply system can meet the water supply flow demand under the current load.

[0077] Bypass start-up, including: The bypass water supply system is usually used as a backup or supplement to the main line, providing the necessary water supply flow when the main line fails or cannot meet the demand. Before starting the bypass system, the system needs to calculate the water supply flow required by the bypass to ensure that it can meet the actual needs of the unit; the specific calculation formula is:

[0078] Q w-bypass =f(P,T,F main ,D load )

[0079] Where: Q w-bypass is the feedwater flow required for bypass, P is the main steam pressure, T is the main steam temperature, F main is the main steam flow rate, D load is the unit load, and f(·) is a function that describes the relationship between variables.

[0080] The switching strategy is determined, including: selecting a better switching strategy according to the performance characteristics of the main bypass water supply system and the current unit operation status, where the logical formula of the switching decision can be expressed as:

[0081]

[0082] Among them, D main Represents the current main water supply flow, D req represents the required water flow rate, Status_M represents whether the current unit operation status is "normal", D main <D req Indicates that the current main water supply flow is insufficient to meet demand. If Status_□= ′ normal ′ And D main ≥D req , it decides to keep the main line running. In other cases, such as Status_M is abnormal or D main <D req , it decides to switch to bypass operation;

[0083] In this embodiment, in this step, the system will detect the working status of the main water supply system in real time. This includes but is not limited to the monitoring of key parameters such as water supply flow, pressure, temperature, etc. These parameters are important bases for evaluating the current operating status of the main water supply system. In order to ensure the accuracy and real-time performance of the data, it is necessary to use highly reliable sensors and data processing systems to collect and analyze these data. After obtaining the real-time working status of the main water supply system, the system will further determine whether the main road can meet the water supply flow demand under the current load. This judgment process depends on the results of the load forecast and water supply flow demand calculation in the previous steps. If the main road cannot meet the demand, the system will enter the next step of operation. When the main road cannot meet the water supply flow demand, the system will start the bypass water supply system. The bypass water supply system is usually used as a backup or supplement to the main road, and can provide the necessary water supply flow when the main road fails or cannot meet the demand. Before starting the bypass system, the system needs to calculate the water supply flow required by the bypass to ensure that it can meet the actual needs of the unit. The selection of the switching strategy is the key to this step. The system needs to select the best switching strategy based on the performance characteristics of the main bypass water supply system and the current operating status of the unit. The selection of the switching strategy should take into account multiple factors, such as system reliability, safety, and economy. For example, when the unit load changes rapidly, a faster and more flexible switching strategy may need to be selected; when the unit is operating relatively stably, a more economical and energy-saving switching strategy can be selected. Status detection is the basis for ensuring the accuracy of the switching decision. Only by accurately grasping the real-time working status of the main water supply system can the correct switching decision be made. Therefore, high-reliability sensors and data processing systems are needed to ensure the accuracy and real-time nature of the data. The accuracy of demand judgment directly affects the correctness of the switching decision. If the judgment is inaccurate, it may lead to unnecessary switching operations or untimely switching. Therefore, it is necessary to rely on accurate load forecasting and water flow demand calculation results to make judgments. Bypass startup is the key to ensuring the continuous and stable operation of the unit. Before starting the bypass system, it is necessary to accurately calculate the water flow required by the bypass to ensure that it can meet the actual needs of the unit. In addition, it is also necessary to pay attention to the startup sequence and operation steps of the bypass system to ensure the safety and stability of the switching process. The selection of the switching strategy is the core of this step. Different switching strategies will have different effects on the operation of the unit. Therefore, when selecting a switching strategy, it is necessary to comprehensively consider multiple factors and make flexible adjustments according to actual conditions. At the same time, it is also necessary to pay attention to the feasibility and feasibility of the switching strategy to ensure that the switching process can proceed smoothly.

[0084] Main bypass switching execution, including:

[0085] Equipment adjustment: According to the switching strategy, the electric gates and regulating valves of the main and bypass water supply systems are automatically adjusted to achieve smooth switching between the main and bypass. First, the system needs to detect the current status of the main and bypass water supply systems, including the position and opening of the electric gates and regulating valves, as well as the flow and pressure of the system, to confirm the current operating status and water supply demand of the unit. According to the aforementioned switching strategy logic expression, it is determined whether to keep the main route or switch to the bypass. If it is decided to switch to the bypass, go to the next step. Before switching to the bypass, ensure that the bypass water supply system is in an operational state, the power supply of the electric gate and regulating valve is connected, and the operating state is normal. According to the current demand flow of the unit, the system is pre-set. First, calculate and set the opening of the bypass regulating valve to ensure that the water supply demand of the unit can be met after the switch. If the main line is currently supplying water, it is necessary to gradually reduce the opening of the main regulating valve to reduce the water supply of the main line, and at the same time monitor whether the water supply demand of the unit is met. When the opening of the main regulating valve is reduced to a certain extent and the water supply demand of the unit is still met, start to gradually open the bypass electric door and regulating valve. In this process, it is necessary to monitor the flow and pressure of the bypass to ensure that they gradually increase to a level that meets the needs of the unit. When the bypass completely takes over the water supply, it is necessary to monitor for a period of time to ensure that the water supply demand of the unit is met and the operation status of the bypass system is stable;

[0086] Parameter monitoring: During the switching process, monitor the changes in water supply flow and pressure parameters in real time to ensure the safety and stability of the switching process. Specifically, set flow and pressure monitoring points at key locations of the main and bypass water supply systems, select appropriate sensors, and ensure that these sensors can accurately and in real time monitor changes in flow and pressure, connect the sensors to the monitoring system, ensure that the sensors can transmit monitoring data to the monitoring system in real time, configure the monitoring system, set the corresponding sampling frequency and data storage method, and during the switching process, the monitoring system should continue to receive flow and pressure data from the sensors, and display and record them in real time;

[0087] In this embodiment, the success or failure of the main bypass switching directly affects the stability and safety of the unit. The accuracy and reliability of equipment adjustment are the basis for ensuring the smooth switching process. Therefore, it is necessary to adopt advanced control algorithms and reliable actuators to achieve accurate equipment adjustment. At the same time, the real-time and accuracy of parameter monitoring are also the key to ensure the safety and stability of the switching process. High-reliability sensors and data processing systems are required to monitor and analyze the changes in key parameters in real time. Through accurate equipment adjustment and real-time parameter monitoring, the smooth execution of the main bypass switching can be ensured, and the operating efficiency and safety of the unit can be improved.

[0088] Optimization and adjustments after switching, including:

[0089] Status monitoring: After the switch is completed, the operating status of the main bypass water supply system is monitored in real time; Performance evaluation: Based on the monitoring results, the system performance is evaluated, including: collecting key performance data from the monitoring system, such as water supply flow, pressure parameters, and response time, clarifying the performance indicators to be evaluated, such as flow stability, pressure fluctuation range, and response time, analyzing the collected data, evaluating whether the performance indicators meet the preset standards or business requirements, and comparing the current performance data with the benchmark data;

[0090] Parameter fine-tuning: Based on the evaluation results, fine-tune the water supply flow and pressure parameters to ensure the efficient and stable operation of the unit during the wide load peak regulation process, including: carefully analyzing the water supply flow and pressure data obtained from the status monitoring, comparing the data before and after the switch, identifying the possible performance bottlenecks or optimization space, setting clear fine-tuning goals based on the analysis results, and formulating a detailed fine-tuning plan, including adjustment parameters, adjustment direction, and expected adjustment range. According to the fine-tuning plan, gradually adjust the water supply flow and pressure. During the fine-tuning process, continuously monitor the system's operating status and parameter changes, and make necessary adjustments and optimizations to the fine-tuning plan based on real-time feedback;

[0091] In this embodiment, after the switching is completed, the first task is to monitor the operating status of the main bypass water supply system in real time. Through the sensors installed in the system, the data of key parameters such as water supply flow, pressure, temperature, etc. are collected and recorded in real time. These data can reflect the operating status of the system under different loads, and are the basis for subsequent performance evaluation and parameter fine-tuning. Based on the data collected by the status monitoring, the performance of the main bypass water supply system is evaluated. The evaluation content mainly includes aspects such as system stability, response speed, and energy efficiency. By comparing with the preset performance indicators, it is judged whether the system meets the requirements, and possible problems or bottlenecks are found. According to the results of the performance evaluation, the parameters such as water supply flow and pressure are fine-tuned. The fine-tuning process needs to be adjusted according to the actual operation of the unit to achieve the best operating effect. For example, if the evaluation results show that the energy efficiency of the system is low, it may be necessary to increase the water supply flow to increase the steam generation; if there are problems with the stability of the system, it may be necessary to adjust the pressure parameters to ensure stable operation of the system.

Claims

1. Application of a water supply main bypass switching control method in unit wide load peak regulation, characterized in that: include: Step 1: Load monitoring and prediction: real-time monitoring of unit load changes, collection of historical load data, and use of advanced prediction algorithms to predict future unit loads; Step 2: Calculate the feedwater flow demand. According to the load forecast results of the unit, analyze the load change trend and amplitude. According to the load change forecast, adjust the reference feedwater flow value. Consider the impact of steam pressure, steam temperature, feedwater temperature, and feedwater pressure on the feedwater flow demand. Combined with the unit operating parameters, calculate the feedwater flow demand value. Step 3: Main bypass switching decision, including:

301. Status detection: Real-time detection of the working status of the main water supply system, including flow, pressure and temperature; 302. Demand judgment: judge whether the main water supply system meets the water supply flow demand under the current load; 303. Bypass start: If the main water supply cannot meet the demand, the bypass water supply system is started and the water supply flow required by the bypass is calculated; 304. Determine the switching strategy: select the optimal switching strategy based on the performance characteristics of the main bypass water supply system and the current unit operating conditions; Step 4: The main bypass switching is executed. According to the switching strategy, the electric gates and regulating valves of the main and bypass water supply systems are automatically adjusted to achieve smooth switching between the main and bypass systems. Step 5: Optimize and adjust after switching. According to the evaluation results, fine-tune the water supply flow and pressure parameters to ensure efficient and stable operation of the unit during wide load peak regulation.

2. The application of a water supply main bypass switching control method according to claim 1 in wide load peak regulation of a unit is characterized in that: Load monitoring and forecasting, including: Load monitoring: The sensors installed on the generator set collect and record the load change data of the unit in real time; Load forecasting: Collect historical load data and data on related factors that may affect load changes, clean the data, remove outliers and missing values, standardize the data, select features that are closely related to load changes, select appropriate prediction algorithms based on data characteristics, use historical data to train prediction models, adjust parameters to optimize prediction results, use independent historical data to verify the model's prediction ability, and use the verified model to predict future loads.

3. The application of a water supply main bypass switching control method according to claim 1 in wide load peak regulation of a unit is characterized in that: The water flow demand calculation is as follows: Demand calculation: Based on the predicted results of the unit load and combined with other operating parameters, the demand value of the water flow rate is calculated through a mathematical formula. The formula is: Q w =a·P+b·T+c·D+d Where: Q w is the feedwater flow rate, P is the unit load forecast result, T is the current steam temperature, D is the fuel consumption rate, and a, b, c, d are coefficients obtained based on experience and historical data analysis; Optimization and adjustment: Taking into account the safe operation restrictions of the unit, the calculated water supply flow demand value is optimized and adjusted, including: determining the safe operation restrictions, clarifying the safe operation range of the water supply flow, and understanding the restrictive conditions that the unit may encounter during operation. Check the calculated value: Compare the calculated water supply flow demand value with the safe operation range of the unit to check whether it exceeds the limit. Adjust the proportional coefficient: If the calculated value is generally too high or too low, the proportional coefficient can be appropriately adjusted to make it closer to the actual operation data. Consider other parameters: If the operation of the unit is also affected by other parameters, these parameters can be included in the calculation model for more accurate predictions. Set a safety threshold: In order to ensure the safe operation of the unit, a certain safety threshold can be set based on the calculated water supply flow demand value.

4. The application of a water supply main bypass switching control method according to claim 1 in wide load peak regulation of a unit is characterized in that: Specifically, the status detection system will detect the working status of the main water supply system in real time, which includes the monitoring of key parameters such as water flow, pressure and temperature. These parameters are important bases for evaluating the current operating status of the main water supply system.

5. The application of a water supply main bypass switching control method according to claim 1 in wide load peak regulation of a unit is characterized in that: Demand judgment includes: after obtaining the real-time working status of the main water supply system, judging whether the main water supply system can meet the water supply flow demand under the current load.

6. Application of a water supply main bypass switching control method according to claim 1 in unit wide load peak regulation, characterized in that: Bypass start-up, including: The bypass water supply system is usually used as a backup or supplement to the main line, providing the necessary water supply flow when the main line fails or cannot meet the demand. Before starting the bypass system, the system needs to calculate the water supply flow required by the bypass to ensure that it can meet the actual needs of the unit; the specific calculation formula is: Q w-bypass =f(P,T,F main ,D load ) Where: Q w-bypass is the feedwater flow required for bypass, P is the main steam pressure, T is the main steam temperature, F main is the main steam flow rate, D load is the unit load, and f(·) is a function that describes the relationship between variables.

7. Application of a water supply main bypass switching control method according to claim 1 in unit wide load peak regulation, characterized in that: The switching strategy is determined, including: selecting a better switching strategy according to the performance characteristics of the main bypass water supply system and the current unit operation status, where the logical formula of the switching decision can be expressed as: Among them, D main Represents the current main water supply flow, D req represents the required water flow rate, Status_M represents whether the current unit operation status is "normal", D main <D req Indicates that the current main water supply flow is insufficient to meet demand. normal ′ And D main ≥D req , then decide to keep the main road running, in other cases, such as Abnormal or D main <D req , it decides to switch to bypass operation.

8. Application of a water supply main bypass switching control method according to claim 1 in wide load peak regulation of a unit, characterized in that: Main bypass switching execution, including: Equipment adjustment: According to the switching strategy, the electric gates and regulating valves of the main and bypass water supply systems are automatically adjusted to achieve smooth switching between the main and bypass. First, the system needs to detect the current status of the main and bypass water supply systems, including the position and opening of the electric gates and regulating valves, as well as the flow and pressure of the system, to confirm the current operating status and water supply demand of the unit. According to the aforementioned switching strategy logic expression, it is determined whether to keep the main route or switch to the bypass. If it is decided to switch to the bypass, go to the next step. Before switching to the bypass, ensure that the bypass water supply system is in an operational state, the power supply of the electric gate and regulating valve is connected, and the operating state is normal. According to the current demand flow of the unit, the system is pre-set. First, calculate and set the opening of the bypass regulating valve to ensure that the water supply demand of the unit can be met after the switch. If the main line is currently supplying water, it is necessary to gradually reduce the opening of the main regulating valve to reduce the water supply of the main line, and at the same time monitor whether the water supply demand of the unit is met. When the opening of the main regulating valve is reduced to a certain extent and the water supply demand of the unit is still met, start to gradually open the bypass electric door and regulating valve. In this process, it is necessary to monitor the flow and pressure of the bypass to ensure that they gradually increase to a level that meets the needs of the unit. When the bypass completely takes over the water supply, it is necessary to monitor for a period of time to ensure that the water supply demand of the unit is met and the operation status of the bypass system is stable; Parameter monitoring: During the switching process, monitor the changes in water supply flow and pressure parameters in real time to ensure the safety and stability of the switching process. Specifically, set flow and pressure monitoring points at key locations of the main and bypass water supply systems, select appropriate sensors, and ensure that these sensors can accurately and in real time monitor changes in flow and pressure, connect the sensors to the monitoring system, ensure that the sensors can transmit monitoring data to the monitoring system in real time, configure the monitoring system, set the corresponding sampling frequency and data storage method, and during the switching process, the monitoring system should continue to receive flow and pressure data from the sensors, and display and record them in real time.

9. Application of a water supply main bypass switching control method according to claim 1 in unit wide load peak regulation, characterized in that: Optimization and adjustments after switching, including: Status monitoring: After the switch is completed, the operating status of the main bypass water supply system is monitored in real time; Performance evaluation: Based on the monitoring results, the system performance is evaluated, including: collecting key performance data from the monitoring system, such as water supply flow, pressure parameters, and response time, clarifying the performance indicators to be evaluated, such as flow stability, pressure fluctuation range, and response time, analyzing the collected data, evaluating whether the performance indicators meet the preset standards or business requirements, and comparing the current performance data with the benchmark data; Parameter fine-tuning: Based on the evaluation results, fine-tune the water supply flow and pressure parameters to ensure efficient and stable operation of the unit during wide load peak regulation, including: carefully analyze the water supply flow and pressure data obtained from status monitoring, compare the data before and after switching, identify possible performance bottlenecks or optimization space, set clear fine-tuning goals based on the analysis results, and formulate a detailed fine-tuning plan, including adjustment parameters, adjustment direction, and expected adjustment range. According to the fine-tuning plan, gradually adjust the water supply flow and pressure. During the fine-tuning process, continuously monitor the system's operating status and parameter changes, and make necessary adjustments and optimizations to the fine-tuning plan based on real-time feedback.

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