Method and device for determining maximum output of single-side auxiliary machine

Abstract

The invention provides a method and a device for determining the maximum output of a single-side auxiliary machine, and aims to determine the maximum output of the single-side auxiliary machine under the cold-state working condition by taking the consistency of outlet pressure under the hot-state working condition and the cold-state working condition as a basis so as to avoid unit safety accidents caused by adjusting the auxiliary machine under the hot-state working condition. The method for determining the maximum output of the single-side auxiliary machine comprises the steps that historical operation parameters of the auxiliary machine in a target unit under the thermal state working condition are obtained, and the historical operation parameters at least comprise the target outlet pressure of the single-side auxiliary machine; when the target unit is in the cold state working condition, a pressure adjusting device corresponding to the single-side auxiliary machine is used for controlling the outlet pressure of the single-side auxiliary machine to reach the target outlet pressure, and the motor current of the single-side auxiliary machine is obtained; and when the current of the motor reaches the rated current of the motor, the opening degree of a movable blade of the single-side auxiliary machine is obtained, and the output corresponding to the opening degree of the movable blade is determined as the maximum output of the single-side auxiliary machine.

Description

Technical Field

[0001] This application relates to the field of power systems, and in particular to a method and apparatus for determining the maximum output of a single-sided auxiliary machine. Background Technology

[0002] During the operation of a thermal power unit, the primary air fan and the forced draft fan are core auxiliary machines ensuring the safe and stable operation of the unit. The primary air fan is responsible for fuel drying and transportation, while the forced draft fan provides oxygen for complete fuel combustion. As shown in Figures 1(a) and 1(b), the primary air fan and forced draft fan are configured in parallel, i.e., the primary air fan includes primary air fan A and primary air fan B, and the forced draft fan includes forced draft fan A and forced draft fan B. In actual operation, when one auxiliary machine triggers the auxiliary machine failure load reduction (RB) function, it is necessary to determine the maximum output of the other auxiliary machine parallel to it, i.e., the maximum output of the single-sided auxiliary machine. For example, if primary air fan A experiences RB, the maximum output of primary air fan B needs to be determined to ensure that the unit load is reduced to a safe level and to avoid the thermal power unit tripping due to a failure of one auxiliary machine.

[0003] Currently, determining the maximum output of a single auxiliary unit requires testing under hot operating conditions. This means that under grid-connected conditions, the maximum output of the single auxiliary unit is determined by shutting down one side of the auxiliary unit while keeping the other running. However, conducting maximum output tests under hot operating conditions is highly dangerous: 1. If the running auxiliary unit malfunctions, it could cause the unit to trip; 2. After the test, restarting the shut-down auxiliary unit and paralleling it is extremely difficult, especially the primary air fan. Due to the high primary air pressure, the fan may stall during paralleling, causing severe fluctuations in primary air pressure, disrupting combustion stability within the boiler, and potentially leading to unit tripping and a safety accident.

[0004] Therefore, a new method for determining the maximum output of a single-sided auxiliary machine is urgently needed to ensure the safe operation of thermal power units. Summary of the Invention

[0005] This application provides a method and apparatus for determining the maximum output of a single-sided auxiliary machine. The purpose is to determine the maximum output of the single-sided auxiliary machine under cold conditions by using the consistency between the target outlet pressure of the single-sided auxiliary machine under hot conditions and the outlet pressure under cold conditions as a basis, thereby avoiding unit safety accidents caused by adjusting the auxiliary machine under hot conditions and ensuring the safe and stable operation of the thermal power unit.

[0006] To address the aforementioned technical problems, this application provides the following technical solutions: The first aspect of this application provides a method for determining the maximum output of a single-sided auxiliary machine, including: Obtain historical operating parameters of the auxiliary equipment in the target unit under hot operating conditions. The historical operating parameters include at least the target outlet pressure of the single-sided auxiliary equipment when only one single-sided auxiliary equipment in the target unit has not experienced auxiliary equipment failure and load reduction failure, and the target unit is in normal operation. When the target unit is in a cold operating condition, the outlet pressure of the single-sided auxiliary machine is controlled to reach the target outlet pressure by using the pressure regulating device corresponding to the single-sided auxiliary machine, and the motor current of the single-sided auxiliary machine is obtained. When the motor current reaches the rated current of the motor, the blade opening of the single-sided auxiliary machine is obtained, and the output corresponding to the blade opening is determined as the maximum output of the single-sided auxiliary machine.

[0007] A second aspect of this application provides a device for determining the maximum output of a single-sided auxiliary machine, comprising: The acquisition unit is used to acquire historical operating parameters of the auxiliary equipment in the target unit under hot operating conditions. The historical operating parameters include at least the target outlet pressure of the single-sided auxiliary equipment in the target unit when only one single-sided auxiliary equipment in the target unit has not experienced auxiliary equipment failure or load reduction failure, and the target unit is in normal operation. The unit is used to control the outlet pressure of the single-sided auxiliary machine to reach the target outlet pressure in the acquisition unit when the target unit is in a cold operating condition, and to acquire the motor current of the single-sided auxiliary machine. The determining unit is used to obtain the blade opening of the single-sided auxiliary machine when the motor current in the obtaining unit reaches the rated current of the motor, and to determine the output corresponding to the blade opening as the maximum output of the single-sided auxiliary machine.

[0008] A third aspect of this application provides a computer-readable storage medium comprising a stored program, wherein, when the program is executed, it controls the device on which the storage medium is located to perform the aforementioned method for determining the maximum output of a single-sided auxiliary machine.

[0009] The fourth aspect of this application provides a storage management device, comprising: a memory for storing a program; and a processor coupled to the memory for running the program to execute the aforementioned method for determining the maximum output of a single-sided auxiliary machine. Compared to existing technologies, the method for determining the maximum output of a single-sided auxiliary machine in this application is based on the consistency between the outlet pressure of the single-sided auxiliary machine under cold and hot conditions when it is at maximum output. This method obtains the target outlet pressure of the single-sided auxiliary machine under a preset load in the hot condition of the target unit, and then controls the outlet pressure of the single-sided auxiliary machine to reach the target outlet pressure in the cold condition. The maximum output is determined by combining this with the blade opening when the motor current reaches the rated current. This achieves the substitution of the maximum output determined under cold conditions for the maximum output determined under hot conditions. By shifting the determination of the maximum output from hot to cold conditions, the maximum output of the single-sided auxiliary machine is obtained. This is because in the cold condition, the unit is not connected to the grid, the boiler is not in combustion, and adjusting the pressure regulating device of the single-sided auxiliary machine to control the outlet pressure will not have any impact on the unit. This method not only obtains the accurate maximum output of the single-sided auxiliary machine but also completely solves the safety problem of determining the maximum output under hot conditions in the prior art. Attached Figure Description

[0010] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application are illustrated by way of example and not limitation, with the same or corresponding reference numerals denoteing the same or corresponding parts, wherein: Figure 1(a) schematically shows the structure of the primary air fan in the unit system; Figure 1(b) schematically shows the structure of the wind turbine in the unit system; Figure 2 A flowchart illustrating a method for determining the maximum output of a single-sided auxiliary machine is shown schematically. Figure 3 A flowchart illustrating another method for determining the maximum output of a single-sided auxiliary machine is shown. Figure 4 A structural diagram of a device for determining the maximum output of a single-sided auxiliary machine is shown. Figure 5 A structural diagram of another device for determining the maximum output of a single-sided auxiliary machine is shown. Detailed Implementation

[0011] Exemplary embodiments of this application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of this application and to fully convey the scope of this application to those skilled in the art.

[0012] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application pertains.

[0013] In the operation of thermal power units, primary air fans and forced draft fans are core auxiliary machines that ensure the safe and stable operation of the unit. Primary air fans are responsible for fuel drying and transportation, while forced draft fans provide oxygen for complete fuel combustion. The output of both directly affects the unit's combustion efficiency and operational safety. Among them, the auxiliary machine failure load reduction (RB) function is a key protection measure when a single auxiliary machine fails. It is necessary to accurately determine the maximum output of a single auxiliary machine when RB is triggered to ensure that the unit load is quickly reduced to a safe level. Currently, the determination of the maximum output of a single auxiliary machine must be carried out under hot operating conditions. The specific process is as follows: First, reduce the unit load to the preset rated load, then release the automatic control of the auxiliary machine to be shut down, reduce its blade opening to zero, and then shut it down. Based on the motor current of the other auxiliary machine, when the current equals the rated current, the output corresponding to the blade opening is determined as the maximum output. Finally, the shut-down auxiliary machine must be started and paralleled to ensure the normal operation of the unit. However, this method has significant drawbacks: first, it relies entirely on the operation of a single auxiliary unit; if a single auxiliary unit suddenly fails, it can easily cause the unit to trip, affecting its safe operation; second, parallel operation of auxiliary units is difficult, especially when the primary air fans are in parallel, as the high primary air pressure can easily cause stall, resulting in drastic pressure fluctuations that directly threaten boiler combustion safety. Therefore, a new method is needed to determine the maximum output of a single auxiliary unit to ensure safe unit operation.

[0014] To overcome the limitations of the aforementioned technical solutions, the applicant conceived of using historical operating parameters of auxiliary equipment under hot conditions (such as the target outlet pressure corresponding to the preset load) as a reference standard for cold-state testing, thus transferring the maximum output determination process to the cold-state condition. In the cold state, the outlet pressure of the auxiliary equipment on one side is controlled to reach the target value through pressure regulating devices, while simultaneously monitoring the motor current. When the current reaches the rated value, the output corresponding to the blade opening at that time is taken as the maximum output. This method does not rely on the independent operation of the auxiliary equipment on one side under hot conditions, avoiding the risk of unit tripping due to a failure of the auxiliary equipment on one side. Furthermore, based on historical hot-state parameters, it ensures that the cold-state determination results match the actual hot-state operating requirements, thereby achieving safe and accurate determination of the maximum output of the auxiliary equipment on one side. The specific steps of this method are as follows: Figure 2 As shown: Step 201: Obtain the historical operating parameters of the auxiliary equipment in the target unit under hot operating conditions; In this step, the historical operating parameters include at least the target outlet pressure of the single-sided auxiliary machine under the preset load. That is, the historical operating parameters include at least the target outlet pressure of the single-sided auxiliary machine when only one single-sided auxiliary machine in the target unit is operating normally and has not experienced an auxiliary machine failure or load reduction fault. The target unit refers to a specific thermal power unit whose maximum output of the single-sided auxiliary machine needs to be determined; the hot operating condition refers to the unit's normal grid-connected operation and the continuous combustion of fuel in the boiler; historical operating parameters refer to various technical data recorded during the unit's past operation, including pressure, temperature, current, and opening degree. A single-sided auxiliary machine refers to a single piece of equipment in a double-row configuration of auxiliary machines in the unit, such as one of two primary air fans. Of course, a single-sided auxiliary machine can also refer to a single auxiliary machine. When the target unit uses multiple auxiliary machines in parallel configuration, the single-sided auxiliary machine is a single auxiliary machine. The preset load is the pre-set unit load level, which is used as a benchmark to determine the target outlet pressure; the target outlet pressure refers to the outlet pressure value of a single auxiliary machine when it is running stably under the preset load and hot operating conditions.

[0015] In this step, the auxiliary equipment (such as primary air fan and forced draft fan) involved in the target unit is first identified. Then, the operating records of the auxiliary equipment under hot conditions are filtered out from the unit's historical operation database. During the filtering process, the operating parameters under preset loads are extracted, with the core parameter being the target outlet pressure of the auxiliary equipment. The preset load is usually the target load when an RB (Restricted Load) occurs. Through statistical analysis of historical data, outliers (such as abnormal pressure data caused by malfunctions or operational errors) are eliminated, and the stable target outlet pressure values ​​corresponding to different preset loads are finally determined. The purpose of this step is to provide benchmark parameters for testing under cold conditions. Since the maximum output of the auxiliary equipment needs to correspond to the actual operating requirements under hot conditions, obtaining the target outlet pressure of the preset load under hot conditions ensures that the pressure conditions during subsequent cold-state testing are consistent with the actual hot-state operating conditions, thereby ensuring that the determined maximum output has practical reference value. Meanwhile, the extraction and analysis of historical operating parameters can eliminate the influence of accidental factors, making the target outlet pressure more accurate and reliable. This lays the foundation for simulating the actual operating state through pressure regulation in subsequent steps, thereby achieving the goal of accurately determining the maximum output of the auxiliary machine on one side through cold testing.

[0016] Step 202: When the target unit is in a cold operating condition, the outlet pressure of the single-sided auxiliary machine is controlled to reach the target outlet pressure by using the pressure regulating device corresponding to the single-sided auxiliary machine, and the motor current of the single-sided auxiliary machine is obtained.

[0017] In this step, cold operating condition refers to a state where the unit is not in operation with fuel combustion, the boiler, pipelines, and other equipment are at ambient temperature, and there is no working fluid circulation or only cold ventilation within the system. Pressure regulating devices are used to adjust the outlet pressure of auxiliary equipment. The outlet pressure of a single auxiliary equipment refers to the fluid pressure (such as primary air or secondary air) at the outlet of the auxiliary equipment, and is an important parameter reflecting the output of the auxiliary equipment. Motor current refers to the current value of the motor driving the auxiliary equipment; its magnitude is positively correlated with the load and output of the auxiliary equipment, and can indirectly reflect the operating status of the auxiliary equipment.

[0018] After determining the target outlet pressure in step 201, the auxiliary machine on one side is started when the target unit is in a cold operating condition. The opening of the moving blades is gradually increased, and the outlet pressure of the auxiliary machine is regulated by the corresponding pressure regulating device (such as a baffle) on the one-sided auxiliary machine: the opening of the regulating device is gradually adjusted, and the outlet pressure of the auxiliary machine is monitored in real time by a pressure sensor and compared with the target outlet pressure determined in step 201. If the current outlet pressure is lower than the target value, the opening of the regulating device is reduced to increase the pressure; if it is higher than the target value, the opening is increased to decrease the pressure until the outlet pressure stabilizes within the target outlet pressure range. During this process, the motor current data of the one-sided auxiliary machine is acquired, and the change of current with pressure regulation is recorded to ensure that the accurate motor current value is obtained when the pressure is stable. Through the above steps, the pressure conditions under hot operating conditions are simulated in a cold environment, creating a pressure environment similar to actual operation for determining the maximum output of the one-sided auxiliary machine. By controlling the outlet pressure to reach the target value, it can be ensured that the test conditions are consistent with the pressure requirements under the preset hot load, so that the subsequently determined maximum output is more in line with the actual operating requirements. Meanwhile, real-time monitoring of motor current allows for timely understanding of the auxiliary equipment's load status, providing crucial data support for determining whether the auxiliary equipment has reached its maximum output. Furthermore, pressure regulation and current monitoring under cold operating conditions avoid the safety risks associated with unilateral operation under hot conditions, eliminating concerns about unit tripping due to auxiliary equipment failure and significantly improving the safety of the testing process.

[0019] Step 203: When the motor current reaches the rated current of the motor, obtain the blade opening of the single-sided auxiliary machine, and determine the output corresponding to the blade opening as the maximum output of the single-sided auxiliary machine.

[0020] In this step, the rated current of the motor refers to the current value of the motor during long-term safe operation under rated voltage and rated power. The blade opening degree refers to the opening angle of the adjustable blades. For auxiliary equipment such as fans, the size of the blade opening degree directly affects the fluid delivery volume and pressure, thus determining the output of the auxiliary equipment. Output refers to the work done by the auxiliary equipment per unit time. For fans, it is usually expressed as air volume, air pressure, or power, and is a core indicator for measuring the working capacity of the auxiliary equipment. Maximum output refers to the maximum working capacity that the auxiliary equipment can achieve under safe operating conditions (motor current not exceeding rated current).

[0021] Based on step 202, while maintaining the outlet pressure at the target outlet pressure, the motor current is acquired. When the motor current reaches the rated current marked on the motor nameplate, the adjustment operation is immediately stopped. The real-time opening value of the auxiliary motor blade (or other adjusting component) on one side is recorded. This opening value is the opening of the auxiliary machine under the current pressure conditions and when the motor is running at full load. The output of the auxiliary machine at this time is the maximum output of the auxiliary machine on one side, and the opening of the blade at this time is the upper limit of the auxiliary motor blade opening during the RB process. This step, by using the rated current of the motor as the judgment benchmark, can ensure that the auxiliary machine does not exceed its design load, avoid equipment damage due to overload, and ensure the safety and reliability of the test results. Through the correspondence between the blade opening and the output, the specific output parameters are converted into the blade opening, making the expression of the maximum output more intuitive and quantitative, and providing accurate control parameter basis for the unit's auxiliary machine fault load reduction (RB) function. In addition, this step is completed under cold conditions, without the need for auxiliary machine shutdown and parallel operation under hot conditions, further ensuring the safety and stability of the unit, while improving the efficiency and accuracy of maximum output determination.

[0022] Furthermore, based on the above Figure 2 The embodiments shown in this application further provide a more detailed explanation of how to determine the maximum output, as detailed below. Figure 3 As shown: Step 301: Theoretical derivation of the maximum output of a single auxiliary machine.

[0023] This embodiment demonstrates how to calculate the maximum output of a single auxiliary unit (primary air fan or forced draft fan) under hot conditions, under cold operating conditions. The specific derivation process is as follows: First, according to the law of conservation of energy, the output power of the auxiliary machine's motor is determined to be equal to the shaft power required by the auxiliary machine. Specifically, this includes: Under hot operating conditions, obtain the voltage of the first motor, the current of the first motor, the efficiency of the motor, the power factor of the motor, the volumetric flow rate through the first auxiliary machine, the pressure rise, the total pressure efficiency of the fan, and the mechanical efficiency of the fan on one side; and under cold operating conditions, obtain the voltage of the second motor, the current of the second motor, the volumetric flow rate through the second auxiliary machine, and the pressure rise of the second auxiliary machine on one side. Under hot operating conditions, the formula for the auxiliary machine's motor output power equaling the required shaft power of the auxiliary machine is: Under cold operating conditions, the formula for the auxiliary machine's motor output power equals the required shaft power of the auxiliary machine is: The auxiliary machine's drive motor is a three-phase asynchronous motor, U H It is the voltage of the first motor, I H It is the current of the first motor, It is motor efficiency, It is the motor power factor, It is the first volumetric flow rate through the auxiliary machine. It is the first pressure rise, It is the total voltage efficiency of the motor. It is mechanical efficiency, U C It is the voltage of the second motor, I C It is the current of the second motor. It is the second volumetric flow rate through the auxiliary machine. It is the second pressure rise. The first pressure rise is the reduction of the target air outlet pressure to zero. The second pressure rise is the reduction of the outlet pressure of the auxiliary machine on one side to zero under cold operating conditions.

[0024] Secondly, obtain the functional relationship between the blade opening and output of the auxiliary machine on one side.

[0025] The method for obtaining the functional relationship between the blade opening and output of a single-sided auxiliary machine includes: Y = f(B) and Y = Q*P, that is, Q*P = f(B). Where Y is the output, which is the product of Q and P, Q is the volumetric flow rate through the auxiliary machine, P is the pressure rise, and B is the blade opening.

[0026] In this step, the functional relationship is a monotonic function, specifically a monotonically increasing function. Furthermore, when obtaining the functional relationship between the blade opening and output of a single auxiliary machine, it is necessary to recognize that the functional forms of different types of auxiliary machines (such as primary air fans, forced draft fans, etc.) differ significantly. This is because the design principles, fluid medium characteristics, and operating environments of various auxiliary machines differ: primary air fans transport high-temperature, dust-laden airflow, and their functional relationship is greatly affected by the medium density; forced draft fans handle clean air, and their characteristics are closer to an ideal fluid model, so the functional curve may exhibit nonlinear characteristics.

[0027] Finally, when the motor current is at its rated current, based on the motor output power of the auxiliary machine, the required shaft power of the auxiliary machine, and the functional relationship, the formula can be obtained: Where f(B) represents the output force, B c Q represents the blade opening at maximum output under cold operating conditions. c The auxiliary machine volumetric flow rate (m³) is the maximum output capacity under cold operating conditions. 3 / s, P c B represents the auxiliary machine's volumetric flow rate at maximum output under cold operating conditions. H Q represents the blade opening at maximum output under hot operating conditions. H The auxiliary machine volumetric flow rate (m³) is the maximum output capacity under hot operating conditions. 3 / s, P H For high output pressure rise under hot working conditions, Pa.

[0028] It is worth noting that in this step, when the motor current is the rated current, the motor voltage (the voltage of the first motor is the same as that of the second motor) and the motor current (the current of the first motor is the same as that of the second motor) are the same regardless of whether the operating conditions are hot or cold. It is mechanical efficiency, It is motor efficiency, The motor power factor remains constant. Based on this, using the formulas for the auxiliary machine's motor output power equaling the required shaft power under hot conditions, the auxiliary machine's motor output power equaling the required shaft power under cold conditions, and the formula Q*P=f(B), the following formula can be derived: At this point, according to the fan's performance characteristics, when the output force Y remains constant (i.e., the product of Q and P is constant), there is a strict one-to-one correspondence between the volumetric flow rate Q and the pressure rise P. This is because the fan's energy conversion characteristics determine that, under a specific blade opening, the matching relationship between its output energy (power) and fluid parameters is unique. Simultaneously, since the fan inlet is always connected to the atmosphere, its inlet pressure, temperature, and other environmental parameters remain constant, providing a stable benchmark for comparing cold and hot operating conditions. Based on this characteristic, if the fan's outlet pressure can be ensured to be completely consistent in cold and hot tests, then under the same output condition, the corresponding volumetric flow rate must also be the same (because Q×P is a constant). Combining the functional relationship between blade opening and output force Y=f(B), it can be seen that when Y and Q×P are both consistent, the blade opening B must also be the same. Therefore, by precisely controlling the fan outlet pressure in the cold test to be consistent with the target pressure at maximum output in the hot state, the equivalent maximum output blade opening under hot conditions can be directly obtained, thereby achieving the goal of accurately determining the maximum output of the single-sided auxiliary machine in a cold environment, and the test results can be directly applied to hot conditions.

[0029] Therefore, by deriving the equations for the auxiliary motor output power and the required shaft power under cold and hot conditions using the law of conservation of energy, the consistency of motor parameters such as voltage, current, and efficiency under rated current is clarified. Simultaneously, a monotonic functional relationship between the blade opening and output is established, and the correlation formulas for blade opening, volumetric flow rate, and pressure rise under cold and hot conditions are derived. Combined with the fan performance characteristics, the core logic of equivalent blade opening when the outlet pressure is consistent is determined. This theoretically solves the adaptation problem of parameter differences between cold and hot operating conditions, providing rigorous theoretical support for subsequent cold-state tests to replace hot-state tests. It ensures that the maximum output data obtained under cold conditions accurately corresponds to the actual operating requirements under hot conditions, laying a crucial theoretical foundation for avoiding the risks of hot-state tests.

[0030] Step 302: Obtain the historical operating parameters of the auxiliary equipment in the target unit under hot operating conditions.

[0031] Based on the derivation in step 301, the historical operating parameters mentioned in this step include at least the target outlet pressure under the preset load of the single-sided auxiliary machine.

[0032] The specific method for obtaining the target outlet pressure is as follows: When the target unit is a production unit, obtain the historical operating data of the target unit; based on the historical operating data, obtain the number of primary air fans or blowers and the rated load of the target unit; divide the rated load by the number to determine the preset load, and determine the target outlet pressure according to the outlet pressure value corresponding to the preset load in the historical operating data.

[0033] Specifically, when the target unit is a production unit, historical operating data (covering extreme winter and summer conditions as well as normal operating conditions) is first retrieved from the unit's operation and maintenance management platform. Data cleaning algorithms are used to remove abnormal periods of shutdown, maintenance, and load fluctuations exceeding ±3% of the rated load, retaining only stable operating data sets. Then, auxiliary equipment configuration information is extracted from the cleaned data: if the primary air fans are "3 units operating in parallel, with a rated load of 1000MW," the preset load is calculated as 1000MW ÷ 3 ≈ 333.3MW; if the forced draft fans are "2 units operating in parallel, with a rated load of 1000MW," the preset load is 1000MW ÷ 2 = 500MW. Finally, operating records where the actual auxiliary equipment load deviates from the preset load within a certain deviation from the historical data are selected. A weighted average method (using the corresponding time period's operating duration as the weight) is used to calculate the outlet pressure. This, combined with the allowable deviation range for outlet pressure in the unit's design specifications, ultimately determines the target outlet pressure for both.

[0034] By retrieving historical operating data covering both extreme and normal operating conditions, and after data cleaning to remove abnormal periods, the number of auxiliary equipment and the rated load of the unit were extracted to calculate the preset load. Then, the target outlet pressure was determined by using a weighted average method combined with the unit design specifications. This process, through multi-condition data coverage and scientific calculation methods, ensures that the target outlet pressure accurately reflects the actual operating pressure of the auxiliary equipment under the preset load in the hot state. This provides key benchmark parameters that match the hot operating conditions for subsequent cold-state tests, ensuring that the pressure environment during cold-state tests is consistent with the actual hot-state requirements. This guarantees the rationality and effectiveness of the cold-state test results from the parameter source.

[0035] Step 303: When the target unit is in a cold operating condition, the outlet pressure of the single-sided auxiliary machine is controlled to reach the target outlet pressure by using the pressure regulating device corresponding to the single-sided auxiliary machine, and the motor current of the single-sided auxiliary machine is obtained.

[0036] Based on the target outlet pressure determined in step 302, when the target unit is in cold operating condition, first confirm the status of the pressure regulating devices corresponding to the auxiliary equipment on one side: if the auxiliary equipment on one side is a primary air fan, its pressure regulating devices are the hot air regulating damper and cold air regulating damper of the coal mill; if the auxiliary equipment on one side is a blower, its pressure regulating devices are the secondary air dampers of each burner. Before starting the auxiliary equipment on one side, confirm that the passage connecting the auxiliary equipment inlet to the atmosphere is not blocked, and ensure that the environmental parameters such as inlet pressure and temperature meet the requirements of cold operating condition (i.e., the unit is not engaged in fuel combustion, the boiler, pipelines and other equipment are at ambient temperature, and there is no working fluid circulation in the system or only cold ventilation).

[0037] After starting the auxiliary unit on one side, the pressure regulating device is controlled using a step-by-step adjustment method: First, the opening of the pressure regulating device is slowly adjusted, and the outlet pressure value is monitored in real time by the pressure sensor at the outlet of the auxiliary unit. The monitored pressure value is then compared in real time with the target outlet pressure determined in step 302. If the current outlet pressure is lower than the target outlet pressure, the opening of the pressure regulating device is gradually reduced, and a preset time is maintained after each adjustment (to ensure pressure stability) before the next adjustment. If the current outlet pressure is higher than the target outlet pressure, the opening of the pressure regulating device is slowly increased, and a stable time is maintained after each adjustment until the outlet pressure stabilizes at the target outlet pressure (the deviation does not exceed the allowable deviation range of outlet pressure in the unit design specifications).

[0038] Throughout the process of adjusting the pressure regulating device to control the outlet pressure, the current data of the auxiliary machine drive motor on one side is continuously collected by the motor current monitoring device, and the trend of current change with pressure adjustment is recorded. After each pressure adjustment and stabilization of the outlet pressure, the current motor current value is recorded synchronously to ensure that the current data corresponds one-to-one with the corresponding outlet pressure state. If abnormal fluctuations in motor current occur during pressure adjustment, the pressure adjustment operation is immediately suspended, the cause of the fluctuation is investigated, and the adjustment process is resumed after the current stabilizes until the outlet pressure stabilizes at the target outlet pressure and the motor current is in a stable monitoring state. In other words, under cold operating conditions, the corresponding pressure regulating device is selected according to the type of auxiliary machine (primary air fan or blower), and the outlet pressure is controlled to the target value through step-by-step adjustment, while continuously monitoring the motor current and recording the correspondence between the two. If abnormal current fluctuations occur, the investigation is suspended. This step establishes pressure conditions equivalent to those in the hot state in a cold environment, eliminating the need to rely on the independent operation of auxiliary equipment on one side in the hot state and completely avoiding the risk of unit tripping due to auxiliary equipment failure in the hot state. Through step-by-step adjustment and real-time monitoring, the outlet pressure is ensured to be stable and up to standard. The synchronously acquired current data provides accurate real-time parameter support for subsequent determination of maximum output, providing operational-level assurance for the safe and accurate conduct of cold state tests.

[0039] Step 304: When the motor current reaches the rated current of the motor, obtain the blade opening of the single-sided auxiliary machine, and determine the output corresponding to the blade opening as the maximum output of the single-sided auxiliary machine.

[0040] In step 303, based on the stable maintenance of the single-sided auxiliary machine outlet pressure at the target outlet pressure and the stable monitoring state of the motor current, the real-time current data of the single-sided auxiliary machine drive motor is continuously collected through the motor current monitoring device, and the collected current data is compared with the rated current marked on the motor nameplate in real time.

[0041] During the comparison process, if the current motor current does not reach the rated current, keep the outlet pressure stable at the target outlet pressure and gradually adjust the blade opening of the auxiliary machine on one side: each time, increase the blade opening by a preset small increment (e.g., 1%-2%), and after each adjustment, maintain it for a preset time (to ensure the motor current fully responds and stabilizes), then collect and compare the difference between the current motor current and the rated current. If the current still does not reach the rated current, repeat the above blade opening adjustment and current monitoring process; if the motor current approaches the rated current (e.g., reaches 95%-98% of the rated current) during the adjustment process, reduce the blade opening adjustment increment (e.g., 0.5%) to accurately control the current rise rate and avoid the current suddenly exceeding the rated current.

[0042] When the motor current reaches the rated current, the blade opening adjustment operation is immediately stopped. The real-time blade opening value of the auxiliary machine on one side is collected by the auxiliary blade opening monitoring module, and the corresponding outlet pressure (confirmed to be stable at the target outlet pressure) and motor current (confirmed to be stable at the rated current) are recorded to form a complete parameter record set. Subsequently, the functional relationship between the blade opening and output of the auxiliary machine on one side (Y=f(B), and Y=Q×P) obtained in step 201 is called. Combined with the currently recorded blade opening value, and the stable target outlet pressure (i.e., pressure rise P) and the volumetric flow rate Q at the corresponding pressure (determined by the fan performance characteristics and the stable state of the outlet pressure, conforming to the relationship that Q×P is a constant value) in step 203, the output Y corresponding to the blade opening is calculated.

[0043] Finally, combining the correspondence between the blade opening and output under cold and hot conditions derived in step 301 (when the outlet pressure is the same, the same blade opening corresponds to the equivalent output under cold and hot conditions), the output corresponding to the blade opening calculated above is determined as the maximum output of the single-sided auxiliary machine, and a test report containing the motor rated current, target outlet pressure, blade opening, volumetric flow rate, pressure rise and maximum output is generated, thus completing the process of determining the maximum output of the single-sided auxiliary machine.

[0044] Therefore, by continuously comparing the motor current with the rated current, the blade opening is gradually adjusted until the current reaches the standard. The blade opening at this point is collected, and the output is calculated and determined by combining the functional relationship in step 301 with the equivalent logic of cold and hot states. This step uses the motor's rated current as a precise judgment benchmark to avoid auxiliary machine overload damage. It achieves the quantitative conversion from opening to output through functional relationship. It eliminates the need for high-risk auxiliary machine shutdown and parallel operation under hot conditions, completely avoiding safety hazards such as primary fan stall during parallel operation. The final test report provides accurate parameters for the unit's RB function, ensuring that the unit can quickly reduce to a safe load when RB is triggered, fully guaranteeing the unit's operational safety and the practicality of the cold test results.

[0045] It is worth noting that, in this embodiment, if the target unit is not a production unit but a newly built unit, the method for determining the maximum output is as follows: When the target unit is a newly built unit, the motor current is acquired; when the motor current is the rated current, a test gauge is acquired under a preset load. The test gauge represents the blade opening of the single-sided auxiliary machine corresponding to different outlet pressures under cold operating conditions. The different outlet pressures are determined based on the target outlet pressure and a preset gradient. The first outlet pressure of the target unit under hot operating conditions is acquired. The first outlet pressure is the outlet pressure of the single-sided auxiliary machine under the preset load. Based on the first outlet pressure, the outlet pressures adjacent to the first outlet pressure are found in the test gauge, and a target range is determined. The target range also contains the blade opening corresponding to the outlet pressure. Using the target range, the target blade opening is determined by the differential method, and the output corresponding to the target blade opening is determined as the maximum output of the single-sided auxiliary machine.

[0046] The formula for calculating the target blade opening is as follows: in, It is the target blade opening degree. The pressure at the air outlet is The corresponding blade opening, The pressure at the air outlet is The corresponding blade opening, A is the preset gradient. The first export pressure, It is the pressure on target exports.

[0047] Specifically, obtaining test results under cold operating conditions can be done as follows: First, when the target unit is in a cold operating condition (the unit is not in fuel combustion, the boiler, pipelines, and other equipment are at ambient temperature, and only cold ventilation is being performed in the system), first identify the pressure regulating devices corresponding to the auxiliary equipment on one side (primary air fan or forced draft fan): the primary air fan uses the hot air regulating damper and cold air regulating damper of the coal mill, and the forced draft fan uses the secondary air damper of each burner layer. Start the auxiliary equipment on one side, collect the motor current in real time through the motor current monitoring device, and gradually adjust the opening of the auxiliary blades until the motor current reaches the rated current marked on the motor nameplate. At this time, lock the blade opening adjustment state to ensure that the current is stably maintained at the rated value. Second, based on the target outlet pressure corresponding to the preset load of the auxiliary equipment on one side, determine multiple different outlet pressure values ​​according to the preset gradient (such as 0.5 kPa) to form a pressure gradient sequence (for example, when the target outlet pressure is 3.0 kPa, the sequence can be set to 2.0 kPa, 2.5 kPa, 3.0 kPa, 3.5 kPa, 4.0 kPa, etc.). For each pressure value, step-by-step adjustment is performed using the corresponding pressure regulating device: if the current outlet pressure is lower than the target pressure value, the opening of the regulating device is slowly increased, and the pressure is maintained for a preset time after each adjustment (to ensure pressure stability) before the next adjustment; if it is higher than the target pressure value, the opening is slowly decreased until the outlet pressure stabilizes at that pressure value (the deviation does not exceed the allowable range of the unit design specifications). Finally, the opening of the single-sided auxiliary moving blades corresponding to each stable outlet pressure value is recorded and compiled into a test table. The test table must clearly represent the one-to-one correspondence between different outlet pressures and corresponding moving blade openings under cold operating conditions, ensuring that the data for each pressure gradient is collected based on the rated current state of the motor, guaranteeing the validity and consistency of the data.

[0048] The specific method for obtaining the first outlet pressure under hot operating conditions is as follows: After the target unit completes its hot start-up and enters a stable operating phase (fuel continues to burn in the boiler, and main steam parameters, flue gas parameters, etc., reach the design operating range), the unit load is adjusted to the preset load. The outlet pressure of the auxiliary unit on one side is monitored in real time using an auxiliary unit outlet pressure sensor. The outlet pressure data under this preset load is continuously collected, and the collection time must cover at least one complete load stabilization cycle (to avoid the impact of short-term fluctuations). The collected outlet pressure data is processed to remove outliers caused by instantaneous fluctuations in operating conditions (such as sudden increases or decreases in data). The average value of the remaining valid data is calculated, and this average value is determined as the first outlet pressure of the auxiliary unit on one side under hot operating conditions and the preset load, ensuring that this pressure value accurately reflects the actual operating pressure state of the auxiliary unit under hot conditions.

[0049] The specific method for determining the target blade opening and maximum output based on the differential method is as follows: From the test table, find two outlet pressure values ​​adjacent to the first outlet pressure (one higher than the first outlet pressure and one lower than the first outlet pressure). These two pressure values ​​and their corresponding blade openings together constitute the target range. For example, if the first outlet pressure is 3.2 kPa, and the adjacent pressure values ​​in the test table are 3.0 kPa (corresponding to blade opening B1) and 3.5 kPa (corresponding to blade opening B2), then the target range is [3.0 kPa, 3.5 kPa], and the corresponding blade openings are [B1, B2].

[0050] Based on the calculation formula for the target blade opening, the parameters of the target range are substituted to calculate the target blade opening B_B. This opening is the blade opening of the single-sided auxiliary machine when it reaches its maximum output under the preset load and first outlet pressure in hot conditions. Then, the functional relationship between the blade opening and output of the single-sided auxiliary machine is called (Y=f(B), and Y=Q×P). Combined with the target blade opening, the first outlet pressure in hot conditions (i.e., pressure rise P), and the corresponding volumetric flow rate Q at this pressure (determined by the fan performance characteristics and the stable hot operating state, conforming to the relationship that Q×P is a constant), the output corresponding to the target blade opening is calculated. This output is determined as the maximum output of the single-sided auxiliary machine, completing the process of determining the maximum output of the single-sided auxiliary machine of the new unit.

[0051] This technical solution addresses the challenge of newly built units lacking historical hot-state operating data. It achieves precise determination of maximum output through a process of acquiring test data under cold-state conditions, obtaining the first outlet pressure under hot-state conditions, and calculating the target blade opening using the differential method. First, in the cold-state condition acquisition stage, pressure regulators are matched according to the auxiliary equipment type, and the test benchmark is locked with the motor's rated current. Multiple pressure conditions are covered according to a preset gradient, ensuring the consistency and comprehensiveness of the test data. This provides reliable data support for subsequent calculations and avoids errors caused by missing or biased data. Second, when acquiring the first outlet pressure under hot-state conditions, load stabilization cycle data collection and outlier removal ensure that the pressure value closely matches the actual hot-state operating conditions, addressing the pain point of newly built units lacking historical data and building an accurate bridge between cold-state data and hot-state conditions. Finally, the differential method utilizes data from adjacent pressure ranges in the test data to accurately derive the target blade opening using formulas. Combined with the functional relationship between blade opening and output, quantitative calculation of output is achieved. The entire solution eliminates the need for high-risk auxiliary equipment shutdown and parallel operation under hot conditions, avoiding safety hazards such as unit tripping and fan stall. At the same time, it ensures that the maximum output result is highly matched with the actual hot demand, provides key parameters for the RB function of the new unit, and ensures the safe and stable operation of the unit after startup.

[0052] Furthermore, as a response to the above Figure 2-3The implementation of the method embodiment shown in this invention provides a device for determining the maximum output of a single-sided auxiliary machine. This device embodiment corresponds to the foregoing method embodiments. For ease of reading, this embodiment will not repeat the details of the foregoing method embodiments one by one, but it should be clear that the device in this embodiment can correspondingly implement all the contents of the foregoing method embodiments. For example... Figure 4 As shown, it includes: Acquisition unit 41 is used to acquire historical operating parameters of auxiliary equipment in the target unit under hot operating conditions. The historical operating parameters include at least the target outlet pressure of the single-sided auxiliary equipment in the target unit when only one single-sided auxiliary equipment in the target unit has not experienced auxiliary equipment failure and load reduction failure, and the target unit is in normal operation. The unit 42 is used to control the outlet pressure of the single-sided auxiliary machine to reach the target outlet pressure in the acquisition unit 31 by using the pressure regulating device corresponding to the single-sided auxiliary machine when the target unit is in a cold state, and to acquire the motor current of the single-sided auxiliary machine. The determining unit 43 is used to obtain the blade opening of the single-sided auxiliary machine when the motor current in the obtaining unit 42 reaches the rated current of the motor, and to determine the output corresponding to the blade opening as the maximum output of the single-sided auxiliary machine.

[0053] Furthermore, such as Figure 5 As shown, when the single-sided auxiliary unit is a single-sided auxiliary unit of a primary air fan or a blower, the acquisition unit 41 includes: The data acquisition module 411 is used to acquire historical operating data of the target unit when the target unit is a production unit; The data acquisition module 411 is used to acquire the number of primary fans or blowers and the rated load of the target unit based on historical operating data. The data determination module 412 is used to determine the preset load by dividing the rated load by the quantity in the data acquisition module 411, and to determine the target outlet pressure based on the outlet pressure value corresponding to the preset load in the historical operating data.

[0054] Furthermore, such as Figure 5 As shown, the device further includes a computing unit 44, which includes: The determination module 441 is used to determine, based on the law of conservation of energy, that the output power of the motor of the auxiliary machine is equal to the shaft power required by the auxiliary machine; The determining module 441 is used to obtain the functional relationship between the blade opening and the output of the single-sided auxiliary machine; The determining module 441 is used to derive the following formula based on the motor output power of the auxiliary machine, the required shaft power of the auxiliary machine, and the functional relationship when the motor current is the rated current: Where f(B) represents the output force, B c Q represents the blade opening at maximum output under cold operating conditions. c The auxiliary machine volumetric flow rate (m³) is the maximum output capacity under cold operating conditions. 3 / s, P c B represents the auxiliary machine's volumetric flow rate at maximum output under cold operating conditions. H Q represents the blade opening at maximum output under hot operating conditions. H The auxiliary machine volumetric flow rate (m³) is the maximum output capacity under hot operating conditions. 3 / s, P H For high output pressure rise under hot working conditions, Pa.

[0055] Furthermore, such as Figure 5 As shown, the determining module 441 includes: The submodule 4411 is used to obtain the first motor voltage, first motor current, motor efficiency, motor power factor, first volumetric flow rate through the auxiliary machine, first pressure rise, fan total pressure efficiency, and mechanical efficiency of the single-sided auxiliary machine under hot working conditions, and the second motor voltage, second motor current, second volumetric flow rate through the auxiliary machine, and second pressure rise of the single-sided auxiliary machine under cold working conditions. The determining submodule 4411 is used to determine the formula for the auxiliary machine's motor output power equal to the required shaft power of the auxiliary machine under hot operating conditions: The submodule 4411 is defined as follows: Under cold operating conditions, the formula for determining that the motor output power of the auxiliary machine equals the required shaft power of the auxiliary machine is: The auxiliary machine's drive motor is a three-phase asynchronous motor, U H It is the voltage of the first motor, I H It is the current of the first motor, It is motor efficiency, It is the motor power factor, QUOTE It is the first volumetric flow rate through the auxiliary machine. It is the first pressure rise, It is the total voltage efficiency of the motor. It is mechanical efficiency, U C It is the voltage of the second motor, I C It is the current of the second motor. It is the second volumetric flow rate through the auxiliary machine. It is the second pressure rise. The first pressure rise is the reduction of the target air outlet pressure to zero. The second pressure rise is the reduction of the outlet pressure of the auxiliary machine on one side to zero under cold operating conditions.

[0056] Furthermore, such as Figure 5As shown, the determining module 441 includes: Y=f(B) Y=Q*P Where Y is the output, which is the product of Q and P, Q is the volumetric flow rate through the auxiliary machine, P is the pressure rise, and B is the blade opening.

[0057] Furthermore, such as Figure 5 As shown, after acquiring the historical operating parameters of the auxiliary equipment in the target unit under hot operating conditions, the determining unit 43 includes: The parameter acquisition module 431 is used to acquire the motor current when the target unit is a newly built unit; The parameter acquisition module 431 is used to acquire a test table under a preset load when the motor current is the rated current. The test table represents the blade opening of the single-sided auxiliary machine corresponding to different outlet pressures. The different outlet pressures are determined based on the target outlet pressure and according to a preset gradient. The parameter acquisition module 431 is used to acquire the first outlet pressure of the target unit under hot operating conditions. The first outlet pressure is the outlet pressure of the auxiliary machine on one side under a preset load. The parameter acquisition module 431 is used to find the outlet pressure adjacent to the first outlet pressure in the test table based on the first outlet pressure, and determine the target range, wherein the target range also includes the blade opening corresponding to the outlet pressure. The output determination module 432 is used to determine the target blade opening degree by using the target interval in the parameter acquisition module 431 and combining the differential method, and to determine the output degree corresponding to the target blade opening degree as the maximum output degree of the single-side auxiliary machine.

[0058] Furthermore, such as Figure 5 As shown, the output module 432 includes: The formula for calculating the target blade opening is: in, It is the target blade opening degree. The pressure at the air outlet is The corresponding blade opening, The pressure at the air outlet is The corresponding blade opening, A is the preset gradient. The first export pressure, It is the pressure on target exports.

[0059] Furthermore, embodiments of the present invention also provide a computing device, the computing device comprising: at least one processor, and a memory, wherein the memory stores instructions executable by the processor, the instructions being executed by the processor, thereby enabling the processor to perform the above-described operations. Figure 2-3 The method for determining the maximum output of a single-sided auxiliary machine as described in any one of the following.

[0060] Furthermore, embodiments of the present invention also provide a readable storage medium for storing a computer program, wherein the computer program, when running, controls the device where the storage medium is located to perform the above-described actions. Figure 2-3 The method for determining the maximum output of a single-sided auxiliary machine as described in any one of the following.

[0061] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0062] It is understood that the relevant features in the above methods and apparatus can be referenced interchangeably. Furthermore, the terms "first," "second," etc., in the above embodiments are used to distinguish between embodiments and do not represent the superiority or inferiority of any particular embodiment.

[0063] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0064] The algorithms and displays provided herein are not inherently related to any particular computer, virtual system, or other device. Various general-purpose systems can also be used in conjunction with the teachings herein. The required structure for constructing such systems is apparent from the above description. Furthermore, this invention is not directed to any particular programming language. It should be understood that the contents of the invention described herein can be implemented using various programming languages, and the above description of specific languages ​​is for the purpose of disclosing the best mode of implementation of the invention. Additionally, the memory may include non-persistent memory in computer-readable media, random access memory (RAM), and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory may include at least one memory chip.

[0065] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0066] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in one or more blocks of the flowchart illustrations and / or one or more blocks of the block diagrams.

[0067] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means that implement the functions specified in one or more flowcharts and / or one or more block diagrams.

[0068] These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, such that the instructions, which execute on the computer or other programmable apparatus, provide steps for implementing the functions specified in one or more flowcharts and / or one or more block diagrams.

[0069] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0070] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0071] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0072] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for determining the maximum output of a single-sided auxiliary machine, characterized in that, include: Obtain historical operating parameters of the auxiliary equipment in the target unit under hot operating conditions. The historical operating parameters include at least the target outlet pressure of the single-sided auxiliary equipment when only one single-sided auxiliary equipment in the target unit has not experienced auxiliary equipment failure and load reduction failure, and the target unit is in normal operation. When the target unit is in a cold operating condition, the outlet pressure of the single-sided auxiliary machine is controlled to reach the target outlet pressure by using the pressure regulating device corresponding to the single-sided auxiliary machine, and the motor current of the single-sided auxiliary machine is obtained. When the motor current reaches the rated current of the motor, the blade opening of the single-sided auxiliary machine is obtained, and the output corresponding to the blade opening is determined as the maximum output of the single-sided auxiliary machine.

2. The method according to claim 1, characterized in that, When the auxiliary unit on one side is a primary air fan or a forced draft fan, the step of acquiring the historical operating parameters of the auxiliary unit in the target unit under hot operating conditions includes: When the target unit is a production unit, acquire the historical operating data of the target unit; Based on historical operating data, obtain the number of primary air fans or forced air fans and the rated load of the target unit; The rated load is divided by the quantity to determine the preset load, and the target outlet pressure is determined based on the outlet pressure value corresponding to the preset load in the historical operating data.

3. The method according to claim 1, characterized in that, Before obtaining the historical operating parameters of the auxiliary equipment in the target unit under hot operating conditions, the method includes: According to the law of conservation of energy, the output power of the auxiliary machine's motor is equal to the shaft power required by the auxiliary machine. Obtain the functional relationship between the blade opening and output of a single auxiliary machine; When the motor current is at its rated current, based on the motor output power of the auxiliary machine, the required shaft power of the auxiliary machine, and the functional relationship, the formula can be obtained: Where f(B) represents the output force, B c Q represents the blade opening at maximum output under cold operating conditions. c The auxiliary machine volumetric flow rate (m³) is the maximum output capacity under cold operating conditions. 3 / s, P c B represents the auxiliary machine's volumetric flow rate at maximum output under cold operating conditions. H Q represents the blade opening at maximum output under hot operating conditions. H The auxiliary machine volumetric flow rate (m³) is the maximum output capacity under hot operating conditions. 3 / s, P H For high output pressure rise under hot working conditions, Pa.

4. The method according to claim 3, characterized in that, According to the law of conservation of energy, determining that the motor output power of the auxiliary machine is equal to the shaft power required by the auxiliary machine includes: Under hot operating conditions, obtain the voltage of the first motor, the current of the first motor, the efficiency of the motor, the power factor of the motor, the volumetric flow rate through the first auxiliary machine, the pressure rise, the total pressure efficiency of the fan, and the mechanical efficiency of the fan on one side; and under cold operating conditions, obtain the voltage of the second motor, the current of the second motor, the volumetric flow rate through the second auxiliary machine, and the pressure rise of the second auxiliary machine on one side. Under hot operating conditions, the formula for the auxiliary machine's motor output power equaling the required shaft power of the auxiliary machine is: Under cold operating conditions, the formula for the auxiliary machine's motor output power equals the required shaft power of the auxiliary machine is: The auxiliary machine's drive motor is a three-phase asynchronous motor, U H It is the voltage of the first motor, I H It is the current of the first motor, It is motor efficiency, It is the motor power factor, It is the first volumetric flow rate through the auxiliary machine. It is the first pressure rise, It is the total voltage efficiency of the motor. It is mechanical efficiency, U C It is the voltage of the second motor, I C It is the current of the second motor. It is the second volumetric flow rate through the auxiliary machine. It is the second pressure rise. The first pressure rise is the reduction of the target air outlet pressure to zero. The second pressure rise is the reduction of the outlet pressure of the auxiliary machine on one side to zero under cold operating conditions.

5. The method according to claim 3, characterized in that, The method for obtaining the functional relationship between the blade opening and output of a single-sided auxiliary machine includes: Y=f(B) Y=Q*P Where Y is the output, which is the product of Q and P, Q is the volumetric flow rate through the auxiliary machine, P is the pressure rise, and B is the blade opening.

6. The method according to claim 1, characterized in that, After obtaining the historical operating parameters of the auxiliary equipment in the target unit under hot operating conditions, the method includes: When the target unit is a newly built unit, obtain the motor current; When the motor current is the rated current, a test gauge is obtained under a preset load. The test gauge characterizes the blade opening of the single auxiliary machine corresponding to different outlet pressures under cold operating conditions. The different outlet pressures are determined based on the target outlet pressure and according to a preset gradient. The first outlet pressure of the target unit under hot operating conditions is obtained. The first outlet pressure is the outlet pressure of the auxiliary machine on one side under a preset load. Based on the first outlet pressure, find the outlet pressures that are adjacent to the first outlet pressure in the test table and determine the target range, which also includes the blade opening corresponding to the outlet pressure. Using the target range and the difference method, the target blade opening is determined, and the output corresponding to the target blade opening is determined as the maximum output of the single-sided auxiliary machine.

7. The method according to claim 6, characterized in that, The method of determining the target blade opening using the target interval and the finite difference method includes: The formula for calculating the target blade opening is: in, It is the target blade opening degree. The pressure at the air outlet is The corresponding blade opening, The pressure at the air outlet is The corresponding blade opening, A is the preset gradient. The first export pressure, It is the pressure on target exports.

8. A device for determining the maximum output of a single-sided auxiliary machine, characterized in that, include: The acquisition unit is used to acquire historical operating parameters of the auxiliary equipment in the target unit under hot operating conditions. The historical operating parameters include at least the target outlet pressure of the single-sided auxiliary equipment in the target unit when only one single-sided auxiliary equipment in the target unit has not experienced auxiliary equipment failure or load reduction failure, and the target unit is in normal operation. The unit is used to control the outlet pressure of the single-sided auxiliary machine to reach the target outlet pressure in the acquisition unit when the target unit is in a cold operating condition, and to acquire the motor current of the single-sided auxiliary machine. The determining unit is used to obtain the blade opening of the single-sided auxiliary machine when the motor current in the obtaining unit reaches the rated current of the motor, and to determine the output corresponding to the blade opening as the maximum output of the single-sided auxiliary machine.

9. A computer-readable storage medium, characterized in that, The storage medium includes a stored program, wherein, when the program is executed, it controls the device containing the storage medium to perform the method for determining the maximum output of a single-sided auxiliary machine as described in any one of claims 1 to 7.

10. A storage management device, characterized in that, The storage management device includes: a memory for storing a program, and a processor coupled to the memory for running the program to perform the method for determining the maximum output of a single-sided auxiliary machine as described in any one of claims 1 to 7.

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