Condensate pump control method and device, electronic equipment and storage medium

Abstract

The invention provides a condensate pump control method and device, electronic equipment and a storage medium. The method comprises the steps that the water level of a deaerator, the pressure difference between condensate water and the deaerator, the boiler main feed water flow and the condensate pump outlet mother pipe pressure are monitored; calculating the conversion efficiency of the condensate pump in the first control mode and the second control mode based on the water level of the deaerator, the pressure difference between the condensate water and the deaerator, the main feed water flow of the boiler and the outlet mother pipe pressure of the condensate pump; and according to the control mode with high conversion efficiency, the condensate pump is controlled to carry out pressure and / or water level adjustment. Compared with the prior art, according to the embodiment of the invention, a plurality of key parameters are monitored in real time, and the conversion efficiency under different control modes is calculated, so that the most energy-saving control mode can be accurately selected to adjust the condensate pump; the control mode based on the conversion efficiency can ensure that the condensate pump always works in the optimal operation state, and unnecessary energy waste is avoided.

Description

Technical Field

[0001] The present disclosure relates to the technical field of thermal power generation, and in particular to a condensate pump control method and device, electronic equipment and storage medium. Background Art

[0002] In thermal power generation systems, condensate pumps play a key role in transporting condensate. The steam turbine generates electricity by working with steam. In this process, steam is converted into condensate after cooling, and the condensate is stored in the condenser. To ensure the continuous and efficient operation of the power generation system, the condensate pump needs to extract the condensate from the condenser and transport it to the deaerator for subsequent treatment. The traditional condensate pump control system generally adopts a fixed mode of variable frequency water level adjustment and water valve pressure adjustment. Although this mode has the advantages of simple adjustment system setting, basically meeting the adjustment requirements and energy saving, its adjustment flexibility and reliability still need to be improved under complex and changeable working conditions. Especially during the operation of the condensate pump, if a control link fails, it may affect the stable operation of the entire condensate transportation system, and thus affect the power generation efficiency. Summary of the invention

[0003] The present disclosure provides a condensate pump control method and device, electronic equipment and storage medium, the main purpose of which is to solve the problem of low operating efficiency of the condensate pump.

[0004] According to a first aspect of the present disclosure, a condensate pump control method is provided, comprising:

[0005] Monitor the deaerator water level, the pressure difference between condensate and deaerator, the boiler main feed water flow rate and the condensate pump outlet main pipe pressure;

[0006] Calculate the conversion efficiency of the condensate pump in the first control mode and the second control mode based on the deaerator water level, the pressure difference between the condensate and the deaerator, the boiler main feed water flow rate, and the condensate pump outlet main pipe pressure;

[0007] According to a control mode with high conversion efficiency, the condensate pump is controlled to adjust the pressure and / or water level.

[0008] In some embodiments, the calculation of the conversion efficiency of the condensate pump in the first control mode and the second control mode based on the deaerator water level, the pressure difference between the condensate and the deaerator, the boiler main feed water flow rate, and the condensate pump outlet main pipe pressure includes:

[0009] Acquire the motor power of the condensate pump, and calculate the conversion efficiency of the condensate pump under the first control mode based on the motor power, the water level of the deaerator and the outlet main pipe pressure of the condensate pump;

[0010] The conversion efficiency of the condensate pump under the second control mode is calculated according to the pressure difference between the condensate and the deaerator and the main feed water flow of the boiler.

[0011] In some embodiments, the obtaining of the motor power of the condensate pump and calculating the conversion efficiency of the condensate pump under the first control mode based on the motor power, the deaerator water level and the outlet main pipe pressure of the condensate pump include:

[0012] Calculating a first energy input of the condensate pump based on the motor power;

[0013] Calculating the first energy output of the condensate pump by using the energy input, the water level of the deaerator, and the outlet main pipe pressure of the condensate pump;

[0014] The conversion efficiency of the condensate pump in the first control mode is calculated according to the first energy output.

[0015] In some embodiments, the calculation of the conversion efficiency of the condensate pump under the second control mode according to the pressure difference between the condensate and the deaerator and the main feed water flow of the boiler includes:

[0016] Calculating a second energy input of the condensate pump according to the pressure difference between the condensate and the deaerator and the main feed water flow of the boiler;

[0017] Calculating the second energy output of the condensate pump by using the pressure difference between the condensate and the deaerator and the main feed water flow of the boiler;

[0018] The conversion efficiency of the condensate pump in the second control mode is calculated according to the second energy output.

[0019] In some embodiments, controlling the condensate pump to adjust the pressure and / or water level according to the control mode with high conversion efficiency includes:

[0020] Comparing the conversion efficiency of the condensate pump in the first control mode and the second control mode, and obtaining a control strategy corresponding to the control mode with higher conversion efficiency;

[0021] A control signal is generated according to the control strategy and sent to the condensate pump to control the condensate pump to adjust the pressure and / or water level.

[0022] According to a second aspect of the present disclosure, a condensate pump control device is provided, comprising:

[0023] Monitoring unit, used to monitor the deaerator water level, the pressure difference between condensate and deaerator, the boiler main feed water flow rate and the condensate pump outlet main pipe pressure;

[0024] A calculation unit, for calculating the conversion efficiency of the condensate pump in the first control mode and the second control mode based on the deaerator water level, the pressure difference between the condensate and the deaerator, the boiler main feed water flow rate and the condensate pump outlet main pipe pressure;

[0025] The control unit is used to control the condensate pump to adjust the pressure and / or water level according to a control mode with high conversion efficiency.

[0026] In some embodiments, the computing unit comprises:

[0027] a first calculation module, configured to obtain the motor power of the condensate pump, and calculate the conversion efficiency of the condensate pump under the first control mode based on the motor power, the water level of the deaerator, and the outlet main pipe pressure of the condensate pump;

[0028] The second calculation module is used to calculate the conversion efficiency of the condensate pump under the second control mode according to the pressure difference between the condensate and the deaerator and the main feed water flow of the boiler.

[0029] In some embodiments, the first computing module is further configured to:

[0030] Calculating a first energy input of the condensate pump based on the motor power;

[0031] Calculating the first energy output of the condensate pump by using the energy input, the water level of the deaerator, and the outlet main pipe pressure of the condensate pump;

[0032] The conversion efficiency of the condensate pump in the first control mode is calculated according to the first energy output.

[0033] In some embodiments, the second computing module is further configured to:

[0034] Calculating a second energy input of the condensate pump according to the pressure difference between the condensate and the deaerator and the main feed water flow of the boiler;

[0035] Calculating the second energy output of the condensate pump by using the pressure difference between the condensate and the deaerator and the main feed water flow of the boiler;

[0036] The conversion efficiency of the condensate pump in the second control mode is calculated according to the second energy output.

[0037] In some embodiments, the control unit comprises:

[0038] An acquisition module, used for comparing the conversion efficiency of the condenser pump under the first control mode and the second control mode, and acquiring a control strategy corresponding to the control mode with higher conversion efficiency;

[0039] The control module is used to generate a control signal according to the control strategy and send it to the condensate pump to control the condensate pump to adjust the pressure and / or water level.

[0040] According to a third aspect of the present disclosure, there is provided an electronic device, including:

[0041] at least one processor; and

[0042] a memory communicatively connected to the at least one processor; wherein,

[0043] The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method described in the first aspect.

[0044] According to a fourth aspect of the present disclosure, a non-transitory computer-readable storage medium storing computer instructions is provided, wherein the computer instructions are used to enable the computer to execute the method described in the first aspect.

[0045] According to a fifth aspect of the present disclosure, a computer program product is provided, comprising a computer program, wherein when the computer program is executed by a processor, the computer program implements the method as described in the first aspect above.

[0046] The present disclosure provides a method and device, electronic device and storage medium for controlling a condensate pump, which monitors the water level of a deaerator, the pressure difference between condensate and a deaerator, the main feed water flow of a boiler and the outlet main pipe pressure of a condensate pump; based on the water level of the deaerator, the pressure difference between condensate and a deaerator, the main feed water flow of a boiler and the outlet main pipe pressure of a condensate pump, the conversion efficiency of the condensate pump in a first control mode and a second control mode is calculated; according to the control mode with high conversion efficiency, the condensate pump is controlled to adjust the pressure and / or water level. Compared with the related art, the embodiment of the present disclosure can accurately select the most energy-saving control mode to adjust the condensate pump by real-time monitoring of multiple key parameters and calculating the conversion efficiency under different control modes; this control method based on conversion efficiency can ensure that the condensate pump always works in the optimal operating state, avoiding unnecessary energy waste; when one control method fails, the redundant design ensures that the condensate pump can still maintain basic operation through another control method, avoiding the condensate pump stopping and causing the entire thermal system to be paralyzed.

[0047] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The accompanying drawings are used to better understand the present solution and do not constitute a limitation of the present disclosure.

[0049] Figure 1 A flow chart of a condensate pump control method provided in an embodiment of the present disclosure;

[0050] Figure 2 A flow chart of another condensate pump control method provided in an embodiment of the present disclosure;

[0051] Figure 3 A schematic diagram of the structure of a condensate pump control device provided in an embodiment of the present disclosure;

[0052] Figure 4 A schematic structural diagram of another condensate pump control device provided in an embodiment of the present disclosure;

[0053] Figure 5 A schematic block diagram of an exemplary electronic device provided for an embodiment of the present disclosure. DETAILED DESCRIPTION

[0054] The following is a description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0055] The following describes the condensate pump control method and device, electronic device, and storage medium according to the embodiments of the present disclosure with reference to the accompanying drawings.

[0056] Figure 1 A flow chart of a condensate pump control method provided in an embodiment of the present disclosure.

[0057] like Figure 1 As shown, the method comprises the following steps:

[0058] Step 101, monitor the deaerator water level, the pressure difference between condensate and the deaerator, the boiler main feed water flow rate, and the condensate pump outlet main pipe pressure.

[0059] In the embodiment of the present disclosure, in the thermal power generation system, a sensor network is constructed to realize accurate monitoring of the deaerator water level, the pressure difference between condensate and deaerator, the boiler main feed water flow rate, and the condensate pump outlet main pipe pressure. For the deaerator water level monitoring, multiple liquid level sensors are installed at different heights of the deaerator, and a redundant design is adopted to ensure the reliability of the water level measurement. These liquid level sensors are connected to the data acquisition unit through high temperature and corrosion resistant connection cables, and the data acquisition unit is responsible for the preliminary processing and transmission of the sensor signals.

[0060] The data acquisition system consists of multiple data acquisition units, which are distributed near each monitoring point and are responsible for collecting the analog signals output by the sensor. These data acquisition units have high-precision analog-to-digital conversion functions. After converting the analog signal into a digital signal, the data is transmitted to the central control system through communication methods such as industrial Ethernet or fieldbus. During the data transmission process, data encryption and verification technology is used to ensure the integrity and accuracy of the data and prevent the data from being tampered with or lost during the transmission process. The central control system is equipped with a high-performance data processing server for receiving, storing and processing data from various monitoring points. The server runs a specially developed monitoring software, which has functions such as real-time data display, historical data storage and query, data analysis and processing. The operator can view the values ​​of each monitoring parameter, curve changes and other information in real time through the human-machine interface, so as to grasp the operating status of the system in a timely manner.

[0061] In order to accurately capture changes in the system's operating status, an appropriate monitoring frequency is set for each monitoring parameter. The monitoring frequency of the deaerator water level, the pressure difference between condensate and deaerator, the boiler main feed water flow rate, and the condensate pump outlet main pipe pressure are all set to collect data once per second. Such high-frequency monitoring can promptly detect small changes in parameters and provide sufficient data support for precise control of the system. For some special operating conditions, such as during unit startup, shutdown, or rapid load changes, the monitoring frequency can be temporarily increased, such as collecting data twice or more per second, in order to understand the dynamic response process of the system in more detail and ensure the safe and stable operation of the system during critical periods.

[0062] After receiving the monitoring data, the central control system first performs validity check and filtering on the data. The validity check is used to eliminate abnormal data caused by sensor failure or transmission error to ensure the reliability of the data. The filtering process uses a digital filtering algorithm to remove noise interference in the data and improve the accuracy of the data. Then, the processed data is analyzed in real time to calculate the statistical indicators such as the rate of change, average value, maximum value, and minimum value of each parameter. These statistical indicators are used to evaluate the operating status of the system and determine whether there are any abnormal conditions. For example, by calculating the rate of change of the deaerator water level, the trend of the water level change can be predicted, and control measures can be taken in advance to prevent the water level from exceeding the safe range.

[0063] Step 102, based on the deaerator water level, the pressure difference between the condensate and the deaerator, the boiler main feed water flow rate and the condensate pump outlet main pipe pressure, calculate the conversion efficiency of the condensate pump in the first control mode and the second control mode.

[0064] In the embodiments of the present disclosure, in the thermal power generation system, key data is collected through a carefully laid out sensor network. The deaerator water level sensor accurately measures the water level height in the deaerator and provides basic water level information for subsequent calculations. The sensor uses high-precision measurement technology, such as ultrasonic or differential pressure measurement principles, to ensure the accuracy of water level data. At the same time, a differential pressure sensor is installed at the connection between the condensate pipeline and the deaerator, which can keenly capture the pressure difference between the condensate and the deaerator. This data is crucial for analyzing the flow characteristics of condensate in the system.

[0065] The boiler main feed water flow sensor is installed on the main feed water pipeline to monitor the feed water flow entering the boiler in real time. The sensor works based on the principle of electromagnetic induction or vortex street, converting flow information into electrical signal transmission. In addition, a pressure sensor is installed on the outlet mother pipe of the condensate pump to monitor the pressure inside the mother pipe. The data collected by these sensors are transmitted to the control system, laying the foundation for calculating the conversion efficiency of the condensate pump under different control modes.

[0066] Changes in the water level of the deaerator directly affect the deoxygenation effect of the system and the water circulation balance. When the water level is too high or too low, it will have an adverse effect on the normal operation of the deaerator, which is in turn related to the stability of the entire thermal system. The pressure difference between the condensate and the deaerator reflects the energy state of the condensate in the process of entering the deaerator. Reasonable control of the pressure difference helps to optimize the energy consumption and operating efficiency of the system. The main feed water flow rate of the boiler is a key parameter for the operation of the boiler. Its size is closely related to the load demand of the boiler, and it is also mutually restricted by the output flow rate of the condensate pump. The outlet main pipe pressure of the condensate pump reflects the working state of the condensate pump and the resistance characteristics of the system. Changes in pressure will affect the condensate delivery capacity and the safe operation of the system.

[0067] Assume that the first control mode is the variable frequency control of the condensate pump. In this mode, the speed of the condensate pump motor can be flexibly adjusted according to the system requirements. By changing the motor frequency, the output flow and pressure of the condensate pump can be precisely controlled. The energy input under the first control mode is calculated, mainly considering the electric energy consumed by driving the condensate pump motor. The real-time power data of the motor is obtained through the power monitoring device, and the power is integrated and calculated over a period of time to obtain the total electric energy consumed by the motor during the period of time, which is the energy input of the condensate pump under the first control mode. In terms of energy output, it mainly includes the work done by the condensate pump on the condensate. One part is the potential energy increased by raising the condensate to the water level of the deaerator, which is calculated according to the gravitational potential energy formula, that is, using the parameters such as the change in the water level of the deaerator, the density of the condensate and the acceleration of gravity. The other part is the energy consumed to overcome the pressure difference between the condensate and the deaerator, the pipeline resistance, etc., which needs to be calculated in combination with the principles of fluid mechanics and the actual monitored pressure data. According to the calculation results of energy input and output, the conversion efficiency of the condensate pump under the first control mode is calculated using the conversion efficiency formula, that is, the ratio of energy output to energy input.

[0068] The second control mode is set to water supply valve control. In this mode, the condensate flow entering the deaerator is controlled by adjusting the opening of the water supply valve, thereby affecting the water level and pressure of the system. The energy input of the second control mode is mainly based on the energy contained in the pressure difference of the condensate before and after the water supply valve. By measuring the pressure before and after the valve and the real-time monitoring of the condensate flow, the energy input within a certain period of time is calculated according to the relevant formula. Its energy output structure is similar to that of the first control mode, and also includes the work done to increase the potential energy of the condensate and overcome the system resistance. However, during the calculation process, due to different control methods, the calculation method of each part of the energy will be adjusted according to the characteristics of the water supply valve control. Finally, according to the energy input and output data of the second control mode, the conversion efficiency of the condensate pump under this mode is obtained according to the conversion efficiency calculation formula.

[0069] By calculating the conversion efficiency of the condenser pump in the first control mode and the second control mode, the two are compared. If the conversion efficiency of the first control mode is higher, this mode is selected to control the condenser pump; conversely, if the conversion efficiency of the second control mode is better, this mode is switched to. This ensures that the condenser pump always works at a higher conversion efficiency during operation, realizes efficient use of energy, and reduces power generation costs.

[0070] Step 103: Control the condensate pump to adjust the pressure and / or water level according to a control mode with high conversion efficiency.

[0071] In the embodiment of the present disclosure, after calculating the conversion efficiency of the condensate pump in the first control mode (e.g., variable frequency control mode) and the second control mode (e.g., water control mode), the control system immediately makes a detailed comparison of the two efficiency values. If the conversion efficiency (η1) of the first control mode is higher than the conversion efficiency (η2) of the second control mode, that is, η1>η2, then the control system will decisively determine that the first control mode is a better choice under the current working conditions, and thus decide to enable the first control mode to perform subsequent pressure and / or water level regulation operations on the condensate pump. On the contrary, if η1<η2, the second control mode is selected.

[0072] When making efficiency comparisons, the control system will fully consider the stability and reliability of the efficiency value. Decisions are not made based only on the results of a single calculation, but also on the average efficiency value over a period of time, efficiency fluctuations and other factors. For example, if the efficiency of the first control mode is slightly higher than that of the second control mode, but its efficiency fluctuates greatly in recent operation, while the efficiency of the second control mode is relatively stable, the control system may more carefully evaluate whether to switch the control mode, or take further monitoring and analysis measures to ensure that the selected control mode can continuously and stably provide higher conversion efficiency.

[0073] The present disclosure provides a method for controlling a condensate pump, monitoring the water level of a deaerator, the pressure difference between condensate and the deaerator, the main feed water flow of a boiler, and the outlet main pipe pressure of a condensate pump; based on the water level of the deaerator, the pressure difference between condensate and the deaerator, the main feed water flow of a boiler, and the outlet main pipe pressure of a condensate pump, calculating the conversion efficiency of the condensate pump in a first control mode and a second control mode; according to the control mode with high conversion efficiency, controlling the condensate pump to adjust the pressure and / or water level. Compared with the related art, the embodiment of the present disclosure can accurately select the most energy-saving control mode to adjust the condensate pump by real-time monitoring of multiple key parameters and calculating the conversion efficiency under different control modes; this control method based on conversion efficiency can ensure that the condensate pump always works in the optimal operating state, avoiding unnecessary energy waste; when one control method fails, the redundant design ensures that the condensate pump can still maintain basic operation through another control method, avoiding the condensate pump stopping and causing the entire thermal system to be paralyzed.

[0074] In order to clearly illustrate the embodiment of the present disclosure, this embodiment provides a flow chart of another condensate pump control method.

[0075] like Figure 2 As shown, the method comprises the following steps:

[0076] Step 201, monitor the deaerator water level, the pressure difference between condensate and deaerator, the boiler main feed water flow rate and the condensate pump outlet main pipe pressure.

[0077] Specifically, in step 201, in order to accurately monitor the water level of the deaerator, a high-precision liquid level sensor, such as a radar liquid level sensor or a differential pressure liquid level transmitter, is selected. The radar liquid level sensor uses the principle of electromagnetic wave reflection to accurately measure the liquid level height in the deaerator, and is not affected by factors such as medium density and temperature. It has the characteristics of high measurement accuracy and strong reliability. The liquid level sensor is installed at a suitable position on the top or side of the deaerator to ensure that its measuring probe can accurately sense water level changes and transmit the measurement signal to the control system through a shielded cable.

[0078] For monitoring the pressure difference between condensate and deaerator, a high-performance pressure difference sensor is used. The sensor should have good accuracy and stability, and be able to accurately measure small pressure differences. The pressure difference sensor is installed upstream and downstream of the connection between the condensate pipeline and the deaerator, and is connected to the medium in the pipeline through a special pressure pipe. It obtains the pressure difference signal before and after the condensate enters the deaerator in real time, and converts it into an electrical signal and transmits it to the control system.

[0079] Advanced electromagnetic flowmeters or vortex flowmeters are used to monitor the main feed water flow of boilers. Electromagnetic flowmeters are based on the principle of electromagnetic induction. They have high flow measurement accuracy for conductive liquids and are not affected by changes in fluid density, viscosity, temperature, pressure and conductivity. Vortex flowmeters measure flow based on the relationship between the frequency and flow velocity of vortices generated alternately on both sides of the vortex generator. They have the advantages of wide measurement range, high accuracy and simple structure. The flowmeter is installed on the straight pipe section of the main feed water pipeline of the boiler. According to the installation requirements of the flowmeter, ensure that there is enough straight pipe section length before and after to ensure measurement accuracy. The flowmeter transmits the measured flow signal to the control system.

[0080] The pressure monitoring of the outlet main pipe of the condensate pump uses high-precision pressure sensors, such as piezoresistive pressure sensors or capacitive pressure sensors. Piezoresistive pressure sensors use the piezoresistive effect of semiconductor materials to convert pressure changes into changes in resistance values, thereby measuring pressure; capacitive pressure sensors measure pressure by measuring changes in capacitance caused by changes in the distance between capacitor plates. They have the characteristics of high accuracy, good stability, and strong anti-interference ability. The pressure sensor is installed at a suitable position on the outlet main pipe of the condensate pump, and is tightly connected to the main pipe through threaded or flanged connections to ensure that the pressure inside the main pipe can be accurately measured and the pressure signal can be transmitted to the control system.

[0081] The analog signals (liquid level, pressure difference, flow, pressure, etc.) collected by the sensor first enter the signal conditioning module. The signal conditioning module amplifies, filters, and performs analog-to-digital conversion on the signals, converting the analog signals into digital signals for analysis and processing by the control system.

[0082] After receiving the monitoring data, the control system performs validity check and filtering on the data. In addition, the monitoring data is also stored in the historical database for subsequent data analysis, fault diagnosis and performance evaluation. Through in-depth analysis of historical data, it is possible to explore the system operation rules, optimize the control strategy, and improve the overall performance and reliability of the system.

[0083] Step 202, obtaining the motor power of the condensate pump, and calculating the conversion efficiency of the condensate pump under the first control mode based on the motor power, the deaerator water level and the outlet main pipe pressure of the condensate pump.

[0084] Step 2021: Calculate the first energy input of the condensate pump based on the motor power.

[0085] Step 2022, using the energy input, the deaerator water level, and the condensate pump outlet main pipe pressure, calculate the first energy output of the condensate pump.

[0086] Step 2023: Calculate the conversion efficiency of the condensate pump under the first control mode according to the first energy output.

[0087] Specifically, in step 202, the real-time power of the condensate pump motor is accurately obtained through the power monitoring device. The motor power reflects the electric energy consumed to drive the condensate pump, and its size directly affects the working state and energy input of the condensate pump. Under different working conditions, the motor power will change with the load change of the condensate pump. For example, when the system's demand for condensate increases and the condensate pump needs to increase the output flow and pressure, the motor power will usually increase accordingly; conversely, when the demand decreases, the motor power will also decrease.

[0088] In addition to obtaining motor power, the water level of the deaerator not only affects the deoxygenation effect, but also has a close relationship with the energy output of the condensate pump. Because one of the main tasks of the condensate pump is to transport condensate to the deaerator, the change of water level will affect the workload of the condensate pump, which is in turn related to energy consumption and output. The outlet main pipe pressure of the condensate pump is an important indicator reflecting the working state of the condensate pump and the system resistance characteristics. It is directly related to the energy required by the condensate pump to overcome the system resistance and output condensate. The change in pressure will cause the condensate pump to work under different pressure environments, thereby affecting its energy conversion efficiency. These parameters are interrelated and influence each other, and together constitute the basic data system for calculating the conversion efficiency of the condensate pump.

[0089] The first energy input of the condenser pump in the first control mode mainly comes from the electric energy consumed by the motor. The accumulated value of the motor power over a period of time is the energy input of the condenser pump. This means that in the calculation process, the motor power needs to be integrated. As time goes by, the energy consumption in these short time intervals is continuously accumulated, and the first energy input of the condenser pump during the entire operation process can be accurately calculated. In fact, in the process of the motor converting electrical energy into mechanical energy to drive the condenser pump, not all electrical energy can be completely and effectively converted into useful work. The motor itself has certain energy losses, such as copper loss (resistance loss caused by current passing through the motor winding) and iron loss (loss caused by magnetic field changes in the motor core). These losses will cause the actual effective energy used to drive the condenser pump to be less than the electric energy consumed by the motor. In a more accurate calculation, the efficiency factor of the motor needs to be considered. The motor power is multiplied by the motor efficiency to obtain the effective power actually used for the operation of the condenser pump, and then the above integral calculation is performed to obtain a more accurate first energy input. However, in this expansion, the basic principles are first explained. If there are further optimization needs later, these factors can be further considered.

[0090] The first energy output of the condensate pump is mainly reflected in two aspects: one is the potential energy increased by raising the condensate to the water level of the deaerator, and the other is the work done to overcome the outlet main pipe pressure of the condensate pump and the system resistance to transport the condensate out.

[0091] When calculating the potential energy of condensate, it is necessary to know the mass flow rate of condensate, the acceleration of gravity, and the change in the water level of the deaerator. These parameters can be used to roughly estimate the energy output of the condensate pump in terms of increasing the potential energy of condensate. For the work of overcoming pressure and resistance, it is necessary to comprehensively consider the outlet main pipe pressure, pipeline characteristics (such as factors affecting resistance such as pipe diameter and roughness. Although these factors are not calculated in detail, they need to be considered in actual engineering) and the flow characteristics of condensate. Through comprehensive analysis and qualitative calculation of these complex factors, the energy output of the condensate pump in overcoming pressure and resistance can be obtained. Adding these two parts of energy output, the first energy output of the condensate pump in the first control mode is obtained.

[0092] The definition of conversion efficiency is the ratio of the useful energy output by the condensate pump (i.e., the first energy output) to the input energy (i.e., the first energy input). It intuitively reflects the degree of energy utilization of the condensate pump in the process of converting electrical energy into mechanical energy and using it to transport condensate. If the conversion efficiency is high, it means that the condensate pump performs well in energy conversion and utilization, and can achieve more useful work output with less energy input; conversely, if the conversion efficiency is low, it means that there is more energy waste, and the operating state or system configuration of the condensate pump may need to be optimized. Dividing the first energy output calculated above by the first energy input gives the conversion efficiency of the condensate pump in the first control mode.

[0093] Step 203, calculating the conversion efficiency of the condensate pump under the second control mode according to the pressure difference between the condensate and the deaerator and the main feed water flow of the boiler.

[0094] Step 2031, calculating the second energy input of the condensate pump according to the pressure difference between the condensate and the deaerator and the main feed water flow of the boiler.

[0095] Step 2032, using the pressure difference between the condensate and the deaerator and the main feed water flow of the boiler, calculate the second energy output of the condensate pump.

[0096] Step 2033: Calculate the conversion efficiency of the condensate pump under the second control mode according to the second energy output.

[0097] Specifically, in step 203, before calculating the conversion efficiency of the condensate pump under the second control mode, it is necessary to accurately obtain two key parameters: the pressure difference between the condensate and the deaerator and the main feed water flow rate of the boiler. The pressure difference between the condensate and the deaerator directly reflects the change in the energy state of the condensate in the process of entering the deaerator. The size of the difference is related to the resistance that the condensate pump needs to overcome under this control mode, thereby affecting the input and output of energy. The main feed water flow rate of the boiler is closely related to the supply and demand balance of the entire thermal system. The change in its value will have an important impact on the workload of the condensate pump, and then be related to the energy conversion process of the condensate pump under the second control mode. These two parameters are interrelated and together constitute the basic elements for calculating the conversion efficiency of the condensate pump in the second control mode, providing a key basis for subsequent calculations.

[0098] In the second control mode, the second energy input of the condensate pump mainly comes from the energy contained in the pressure difference of the condensate before and after the water supply valve. In fact, there are some other factors in the system that will affect the energy input. For example, the characteristics of the water supply valve itself (such as the size of the valve opening, the type of valve, etc.) will affect the efficiency of converting the pressure difference into actual energy input. If the valve opening is small, even if the pressure difference is large, the part that can actually be used to promote the flow of condensate and converted into the energy input of the condensate pump may be limited. In addition, pipeline characteristics such as pipeline roughness, length, and number of elbows will also affect the energy input. The rough inner wall of the pipeline will increase the resistance to the flow of condensate, resulting in part of the pressure difference energy being consumed in overcoming the pipeline resistance, thereby reducing the effective energy input that can ultimately be used for the condensate pump. In more accurate calculations, these factors need to be considered comprehensively, but in this expansion, we will first focus on the impact of the main parameters on the energy input.

[0099] The second energy output of the condensate pump in the second control mode is also reflected in two key aspects. On the one hand, it is the potential energy added by raising the condensate to the water level of the deaerator, which is related to the quality of the condensate and the change in the water level of the deaerator. On the other hand, it is the work done to overcome the pressure difference between the condensate and the deaerator and other system resistances (such as pipeline resistance, etc.) to transport the condensate to the deaerator. A larger pressure difference means that the condensate pump needs more power to push the condensate to overcome this pressure difference and enter the deaerator, which requires more energy consumption, and also reflects the energy output in this aspect.

[0100] Like the first control mode, the conversion efficiency in the second control mode is also the ratio of the useful energy output by the condenser pump (i.e., the second energy output) to the input energy (i.e., the second energy input). It is a key indicator to measure the effectiveness of the energy utilization of the condenser pump in the second control mode. If the conversion efficiency is high, it means that the condenser pump can efficiently convert the input energy into useful work in this mode and achieve a better energy utilization effect; conversely, if the conversion efficiency is low, it means that there are more losses or unreasonable aspects in the energy conversion process, and further analysis of the reasons and optimization are needed. Divide the second energy output calculated above by the second energy input to get the conversion efficiency of the condenser pump in the second control mode.

[0101] Step 204 : compare the conversion efficiency of the condensate pump in the first control mode and the second control mode, and obtain a control strategy corresponding to the control mode with higher conversion efficiency.

[0102] Specifically, in step 204, in addition to simply comparing the conversion efficiency values, the adaptability of the two control modes under the current system operating conditions must also be fully considered. Different operating conditions, such as the load of the unit, the change of steam parameters, the initial state of the deaerator water level, etc., may have different effects on the performance of the two control modes. For example, under low load conditions, the first control mode (such as frequency conversion control) may perform better in terms of energy saving, but under high load conditions and when the system pressure fluctuates greatly, the second control mode (such as water regulating valve control) may be more able to respond quickly and stabilize the system pressure, although its conversion efficiency may be slightly lower than the first control mode in terms of value. Therefore, it is necessary to comprehensively evaluate the impact of the current operating conditions on the two control modes, and combine the conversion efficiency with the adaptability of the operating conditions as an important basis for selecting the control mode. A direct numerical comparison is made between the conversion efficiency of the first control mode (set as η1) and the conversion efficiency of the second control mode (set as η2) after sorting and checking. However, as mentioned above, decisions cannot be made based solely on the numerical value. In actual operation, the characteristics of the current operating conditions must be deeply analyzed. Assuming that the unit is currently in the startup phase, although the conversion efficiency of the first control mode is slightly higher than that of the second control mode, the startup phase has high requirements for the rapid establishment of condensate flow and pressure, and the second control mode may be able to respond faster and meet system requirements in this case, although its conversion efficiency is slightly lower. At this time, it is necessary to comprehensively consider the special needs of the startup phase, the dynamic response characteristics of the two modes, and the long-term operation stability and other factors, and further evaluate and weigh the comparison results. If under stable operating conditions, the conversion efficiency of the first control mode is significantly higher than that of the second control mode, and its control effect on system pressure and water level also meets the requirements, then the first control mode may be a better choice.

[0103] According to the efficiency comparison results and the comprehensive analysis of the adaptability to the working conditions, the control mode with high conversion efficiency and the most suitable for the current working conditions is finally determined. If the first control mode is determined to be the best choice after a comprehensive evaluation, the corresponding control strategy becomes the guiding scheme for the current condensate pump operation. Conversely, if the second control mode is better, its corresponding control strategy is adopted. For example, if the first control mode is selected, its control strategy may include accurately controlling the condensate flow and pressure by adjusting the condensate pump motor frequency according to parameters such as the deaerator water level deviation and the condensate pump outlet main pipe pressure deviation, so as to achieve efficient and stable operation.

[0104] The control strategy covers a series of specific control methods and parameter settings. Taking the first control mode as an example, its control strategy includes setting a reasonable motor frequency adjustment range, determining the corresponding frequency adjustment step according to different water level and pressure deviation ranges, and how to coordinate control with other related system parameters (such as boiler main feed water flow). These control strategies will be applied to the actual condensate pump operation control to ensure that the condensate pump can adjust the pressure and / or water level in the best way. At the same time, the control system will monitor the system operating parameters in real time, dynamically optimize and adjust the control strategy according to the actual situation to adapt to changes in working conditions, always keep the condensate pump running in an efficient and stable state, and improve the operation economy and reliability of the entire system.

[0105] Step 205: Generate a control signal according to the control strategy and send it to the condensate pump to control the condensate pump to adjust the pressure and / or water level.

[0106] Specifically in step 205, after determining a control strategy with high conversion efficiency and adaptability to the working conditions, the control system first analyzes the control strategy in detail. For example, if the control strategy is based on condensate pump regulation under variable frequency control mode, the control system will convert the various parameters and instructions in the control strategy into specific digital signal codes according to preset algorithms and rules. This includes calculating the required condensate pump motor frequency adjustment amount based on the real-time monitoring values ​​of parameters such as deaerator water level deviation, condensate pump outlet main pipe pressure deviation, and boiler main feed water flow. This frequency adjustment amount is converted into a corresponding electrical signal value, such as a 0-10V or 4-20mA analog signal, or a specific digital encoding format (if a digital communication method is used to control the motor inverter). These encoded signals accurately represent the action that the control system expects the condensate pump to take, that is, at what frequency to operate to achieve precise regulation of pressure and / or water level.

[0107] In the process of generating control signals, the control system fully considers the dynamic characteristics of the system. Since the thermal system has certain inertia and hysteresis, for example, when the frequency of the condensate pump motor is adjusted, the changes in the condensate flow and pressure will not occur immediately, but will take a certain amount of time to respond. Therefore, the control system will optimize the control signal according to the dynamic response model of the system (this model can be established based on actual tests and empirical data). For example, the predictive control algorithm is used to predict the change trend of the system in the future according to the current system state and control objectives, and the control signal is adjusted in advance to compensate for the system delay, so that the adjustment of the condensate pump is more timely and accurate. At the same time, the control system will also take into account the changes in system characteristics under different working conditions. For example, the system response speed may be slower under high load conditions, and the control signal generation method will be adjusted accordingly to ensure stable and effective control under various working conditions.

[0108] After the control signal reaches the drive device of the condensate pump, the drive device (such as a frequency converter) performs corresponding actions according to the received signal. For the variable frequency control mode, the frequency converter will adjust the power frequency output to the condensate pump motor according to the control signal. If the control signal requires an increase in the motor frequency, the frequency converter will convert the input fixed frequency power supply into a higher frequency power supply and output it to the motor, thereby increasing the motor speed and increasing the output flow and pressure of the condensate pump. Conversely, if the control signal requires a reduction in frequency, the frequency converter will reduce the output frequency, reduce the motor speed, and reduce the output of the condensate pump. When executing the control signal, the drive device will further process and verify the signal, such as checking the integrity and rationality of the signal, to ensure that the condensate pump can accurately operate according to the requirements of the control system and achieve accurate regulation of pressure and / or water level. At the same time, the drive device will feed back its own working status (such as actual output frequency, current, voltage, etc.) to the control system so that the control system can monitor the operation of the condensate pump in real time and perform further control and optimization.

[0109] In the process of the condensate pump adjusting the pressure and / or water level according to the control signal, the control system continuously monitors the key parameters such as the deaerator water level, the pressure difference between the condensate and the deaerator, the boiler main feed water flow rate, and the condensate pump outlet main pipe pressure in real time. The real-time monitoring data of these parameters are collected by sensors and quickly transmitted back to the control system. The control system compares these actual measured values ​​with the preset control target values ​​and calculates the current deviation. For example, the deviation between the actual value of the deaerator water level and the set water level value, the deviation between the actual value of the condensate pump outlet main pipe pressure and the target pressure value, etc. are monitored. At the same time, the actual operating parameters of the condensate pump motor, such as motor speed, current, temperature, etc., are monitored. These parameters are also provided to the control system as feedback information for a comprehensive evaluation of the operating status of the condensate pump.

[0110] Based on the feedback information monitored in real time, the control system determines whether the adjustment effect of the condensate pump meets expectations. If it is found that the deviation between the actual parameter and the target value exceeds the allowable range, the control system will immediately start the feedback adjustment mechanism. This may involve recalculating the parameters in the control strategy, such as adjusting the adjustment step of the motor frequency, changing the proportional integral differential (PID) coefficient in the control algorithm, etc. Then, a new control signal is generated according to the new control strategy and sent to the drive device of the condensate pump to further adjust the operation of the condensate pump. For example, if the water level of the deaerator continues to rise and exceeds the upper limit, the control system will increase the reduction of the motor frequency, so that the condensate pump can reduce the condensate flow faster and cause the water level to drop. Through this continuous monitoring, feedback and adjustment process, it is ensured that the condensate pump can always stably control the pressure and / or water level within the target range, achieve accurate and efficient regulation, and improve the operational stability and reliability of the entire thermal system.

[0111] It should be noted that the embodiments of the present disclosure may include multiple steps. For the convenience of description, these steps are numbered, but these numbers do not limit the execution time slots or execution order between the steps; these steps can be implemented in any order, and the embodiments of the present disclosure do not limit this.

[0112] Corresponding to the above condensate pump control method, the present invention also provides a condensate pump control device. Since the device embodiment of the present invention corresponds to the above method embodiment, details not disclosed in the device embodiment can be referred to the above method embodiment, and will not be repeated in the present invention.

[0113] Figure 3 A schematic diagram of a condensate pump control device provided in an embodiment of the present disclosure is shown in FIG. Figure 3 As shown, including:

[0114] Monitoring unit 31, used to monitor the deaerator water level, the pressure difference between condensate and deaerator, the boiler main feed water flow rate and the condensate pump outlet main pipe pressure;

[0115] A calculation unit 32, configured to calculate the conversion efficiency of the condensate pump in the first control mode and the second control mode based on the deaerator water level, the pressure difference between the condensate and the deaerator, the boiler main feed water flow rate, and the condensate pump outlet main pipe pressure;

[0116] The control unit 33 is used to control the condensate pump to adjust the pressure and / or water level according to a control mode with high conversion efficiency.

[0117] The present disclosure provides a condensate pump control device, which monitors the deaerator water level, the pressure difference between condensate and deaerator, the boiler main feed water flow rate and the condensate pump outlet main pipe pressure; based on the deaerator water level, the condensate and deaerator pressure difference, the boiler main feed water flow rate and the condensate pump outlet main pipe pressure, the conversion efficiency of the condensate pump in the first control mode and the second control mode is calculated; according to the control mode with high conversion efficiency, the condensate pump is controlled to adjust the pressure and / or water level. Compared with the related art, the embodiment of the present disclosure can accurately select the most energy-saving control mode to adjust the condensate pump by real-time monitoring of multiple key parameters and calculating the conversion efficiency under different control modes; this control method based on conversion efficiency can ensure that the condensate pump always works in the optimal operating state, avoiding unnecessary energy waste; when one control method fails, the redundant design ensures that the condensate pump can still maintain basic operation through another control method, avoiding the condensate pump stopping and causing the entire thermal system to be paralyzed.

[0118] Furthermore, in a possible implementation of this embodiment, as Figure 4 As shown, the calculation unit 32 includes:

[0119] The first calculation module 321 is used to obtain the motor power of the condensate pump, and calculate the conversion efficiency of the condensate pump under the first control mode based on the motor power, the deaerator water level and the outlet main pipe pressure of the condensate pump;

[0120] The second calculation module 322 is used to calculate the conversion efficiency of the condensate pump under the second control mode according to the pressure difference between the condensate and the deaerator and the main feed water flow of the boiler.

[0121] Furthermore, in a possible implementation of this embodiment, the first calculation module 321 is further configured to:

[0122] Calculating a first energy input of the condensate pump based on the motor power;

[0123] Calculating the first energy output of the condensate pump by using the energy input, the water level of the deaerator, and the outlet main pipe pressure of the condensate pump;

[0124] The conversion efficiency of the condensate pump in the first control mode is calculated according to the first energy output.

[0125] Furthermore, in a possible implementation of this embodiment, the second calculation module 322 is further configured to:

[0126] Calculating a second energy input of the condensate pump according to the pressure difference between the condensate and the deaerator and the main feed water flow of the boiler;

[0127] Calculating the second energy output of the condensate pump by using the pressure difference between the condensate and the deaerator and the main feed water flow of the boiler;

[0128] The conversion efficiency of the condensate pump in the second control mode is calculated according to the second energy output.

[0129] Furthermore, in a possible implementation of this embodiment, as Figure 4 As shown, the control unit 33 includes:

[0130] An acquisition module 331 is used to compare the conversion efficiency of the condenser pump in the first control mode and the second control mode, and to acquire a control strategy corresponding to the control mode with higher conversion efficiency;

[0131] The control module 332 is used to generate a control signal according to the control strategy and send it to the condensate pump to control the condensate pump to adjust the pressure and / or water level.

[0132] It should be noted that the above explanation of the method embodiment is also applicable to the device of this embodiment, and the principle is the same, which is not limited in this embodiment.

[0133] According to an embodiment of the present disclosure, the present disclosure also provides an electronic device, a readable storage medium and a computer program product.

[0134] Figure 5 A schematic block diagram of an example electronic device 400 that can be used to implement an embodiment of the present disclosure is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present disclosure described and / or required herein.

[0135] like Figure 5 As shown, the device 400 includes a computing unit 401, which can perform various appropriate actions and processes according to a computer program stored in a ROM (Read-Only Memory) 402 or a computer program loaded from a storage unit 408 to a RAM (Random Access Memory) 403. In the RAM 403, various programs and data required for the operation of the device 400 can also be stored. The computing unit 401, the ROM 402, and the RAM 403 are connected to each other via a bus 404. An I / O (Input / Output) interface 405 is also connected to the bus 404.

[0136] A number of components in the device 400 are connected to the I / O interface 405, including: an input unit 406, such as a keyboard, a mouse, etc.; an output unit 407, such as various types of displays, speakers, etc.; a storage unit 408, such as a disk, an optical disk, etc.; and a communication unit 409, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 409 allows the device 400 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0137] The computing unit 401 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the computing unit 401 include, but are not limited to, a CPU (Central Processing Unit), a GPU (Graphic Processing Units), various dedicated AI (Artificial Intelligence) computing chips, various computing units running machine learning model algorithms, a DSP (Digital Signal Processor), and any appropriate processor, controller, microcontroller, etc. The computing unit 401 performs the various methods and processes described above, such as the method of condensation pump control. For example, in some embodiments, the method of condensation pump control may be implemented as a computer software program, which is tangibly contained in a machine-readable medium, such as a storage unit 408. In some embodiments, part or all of the computer program may be loaded and / or installed on the device 400 via the ROM 402 and / or the communication unit 409. When the computer program is loaded into the RAM 403 and executed by the computing unit 401, one or more steps of the method described above may be performed. Alternatively, in other embodiments, the computing unit 401 may be configured to execute the aforementioned condensate pump control method in any other appropriate manner (for example, by means of firmware).

[0138] Various embodiments of the systems and techniques described above herein may be implemented in digital electronic circuit systems, integrated circuit systems, FPGAs (Field Programmable Gate Arrays), ASICs (Application-Specific Integrated Circuits), ASSPs (Application Specific Standard Products), SOCs (System On Chips), CPLDs (Complex Programmable Logic Devices), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include: being implemented in one or more computer programs that may be executed and / or interpreted on a programmable system including at least one programmable processor that may be a special purpose or general purpose programmable processor that may receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0139] The program code for implementing the method of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that the program code, when executed by the processor or controller, enables the functions / operations specified in the flow chart and / or block diagram to be implemented. The program code may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0140] In the context of the present disclosure, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any suitable combination of the foregoing. More specific examples of machine-readable storage media may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a RAM, a ROM, an EPROM (Electrically Programmable Read-Only-Memory) or a flash memory, an optical fiber, a CD-ROM (Compact Dis sc Read-Only Memory), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0141] To provide interaction with a user, the systems and techniques described herein can be implemented on a computer having: a display device (e.g., a CRT (Cathode-Ray Tube) or LCD (Liquid Crystal Display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or a trackball), through which the user can provide input to the computer. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0142] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: LAN (Local Area Network), WAN (Wide Area Network), the Internet, and blockchain networks.

[0143] A computer system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The relationship between the client and the server is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services ("Virtual Private Server", or "VPS" for short). The server may also be a server of a distributed system, or a server combined with a blockchain.

[0144] It should be noted that artificial intelligence is a discipline that studies how computers can simulate certain human thought processes and intelligent behaviors (such as learning, reasoning, thinking, planning, etc.), and includes both hardware-level and software-level technologies. Artificial intelligence hardware technologies generally include technologies such as sensors, dedicated artificial intelligence chips, cloud computing, distributed storage, and big data processing; artificial intelligence software technologies mainly include computer vision technology, speech recognition technology, natural language processing technology, as well as machine learning / deep learning, big data processing technology, knowledge graph technology, and other major directions.

[0145] The various numerical numbers such as first and second involved in the present disclosure are only for the convenience of description and are not used to limit the scope of the embodiments of the present disclosure, but also indicate the order of precedence.

[0146] At least one in the present disclosure may also be described as one or more, and a plurality may be two, three, four or more, which is not limited in the present disclosure. In the embodiments of the present disclosure, for a technical feature, the technical features in the technical feature are distinguished by "first", "second", "third", "A", "B", "C" and "D", etc., and there is no order of precedence or size between the technical features described by the "first", "second", "third", "A", "B", "C" and "D".

[0147] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this disclosure can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solutions disclosed in this disclosure can be achieved, and this document does not limit this.

[0148] The above specific implementations do not constitute a limitation on the protection scope of the present disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A method for controlling a condensate pump, characterized in that: include: Monitor the deaerator water level, the pressure difference between condensate and deaerator, the boiler main feed water flow rate and the condensate pump outlet main pipe pressure; Calculate the conversion efficiency of the condensate pump in the first control mode and the second control mode based on the deaerator water level, the pressure difference between the condensate and the deaerator, the boiler main feed water flow rate, and the condensate pump outlet main pipe pressure; According to a control mode with high conversion efficiency, the condensate pump is controlled to adjust the pressure and / or water level.

2. The method according to claim 1, characterized in that The calculation of the conversion efficiency of the condensate pump in the first control mode and the second control mode based on the deaerator water level, the pressure difference between the condensate and the deaerator, the boiler main feed water flow rate and the condensate pump outlet main pipe pressure includes: Acquire the motor power of the condensate pump, and calculate the conversion efficiency of the condensate pump under the first control mode based on the motor power, the water level of the deaerator and the outlet main pipe pressure of the condensate pump; The conversion efficiency of the condensate pump under the second control mode is calculated according to the pressure difference between the condensate and the deaerator and the main feed water flow of the boiler.

3. The method according to claim 2, characterized in that The obtaining of the motor power of the condensate pump and calculating the conversion efficiency of the condensate pump under the first control mode based on the motor power, the water level of the deaerator and the outlet main pipe pressure of the condensate pump includes: Calculating a first energy input of the condensate pump based on the motor power; Calculating the first energy output of the condensate pump by using the energy input, the water level of the deaerator, and the outlet main pipe pressure of the condensate pump; The conversion efficiency of the condensate pump in the first control mode is calculated according to the first energy output.

4. The method according to claim 2, characterized in that: The calculating the conversion efficiency of the condensate pump under the second control mode according to the pressure difference between the condensate and the deaerator and the main feed water flow of the boiler includes: Calculating a second energy input of the condensate pump according to the pressure difference between the condensate and the deaerator and the main feed water flow of the boiler; Calculating the second energy output of the condensate pump by using the pressure difference between the condensate and the deaerator and the main feed water flow of the boiler; The conversion efficiency of the condensate pump in the second control mode is calculated according to the second energy output.

5. The method according to any one of claims 1 to 4, characterized in that According to the control mode with high conversion efficiency, controlling the condensate pump to adjust the pressure and / or water level includes: Comparing the conversion efficiency of the condensate pump in the first control mode and the second control mode, and obtaining a control strategy corresponding to the control mode with higher conversion efficiency; A control signal is generated according to the control strategy and sent to the condensate pump to control the condensate pump to adjust the pressure and / or water level.

6. A condensate pump control device, characterized in that: include: Monitoring unit, used to monitor the deaerator water level, the pressure difference between condensate and deaerator, the boiler main feed water flow rate and the condensate pump outlet main pipe pressure; A calculation unit, for calculating the conversion efficiency of the condensate pump in the first control mode and the second control mode based on the deaerator water level, the pressure difference between the condensate and the deaerator, the boiler main feed water flow rate and the condensate pump outlet main pipe pressure; The control unit is used to control the condensate pump to adjust the pressure and / or water level according to a control mode with high conversion efficiency.

7. The device according to claim 6, characterized in that The computing unit comprises: a first calculation module, configured to obtain the motor power of the condensate pump, and calculate the conversion efficiency of the condensate pump under the first control mode based on the motor power, the water level of the deaerator, and the outlet main pipe pressure of the condensate pump; The second calculation module is used to calculate the conversion efficiency of the condensate pump under the second control mode according to the pressure difference between the condensate and the deaerator and the main feed water flow of the boiler.

8. An electronic device, characterized in that: include: at least one processor; as well as a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 5.

9. A non-transitory computer-readable storage medium storing computer instructions, characterized in that: The computer instructions are used to cause the computer to execute the method according to any one of claims 1-5.

10. A computer program product, characterized in that The invention comprises a computer program which, when executed by a processor, implements the method according to any one of claims 1 to 5.

Images