A fan group control method based on air volume decoupling distribution

Abstract

The present application belongs to the field of motor energy-saving control, and specifically refers to a fan group control method based on air volume decoupling distribution, comprising the following steps: S1 parameter initialization and environment perception; S2 segmented linear model calculation of target total air volume based on dynamic temperature control bandwidth; S3 execution of fan cluster total air volume integer distribution based on energy efficiency optimization principle; S4 long-period intermittent control for residual air volume; and S5 execution of life balance scheduling and dead zone protection mechanism based on spatial symmetry. Through the cooperative work of parameter initialization, air volume decoupling, energy efficiency distribution and spatial symmetry scheduling mechanism, the present application realizes low-cost, high-energy efficiency, high-precision and airflow uniformity energy-saving regulation and control of large-space controlled environment without the need of frequency conversion modification.

Description

Technical Field

[0001] This invention belongs to the field of motor energy-saving control, specifically referring to a fan group control method based on air volume decoupling distribution. Background Technology

[0002] As the core actuators of environmental control systems, the efficiency of motor-driven wind turbines directly determines the system's control effect and energy consumption costs. However, the control of such equipment groups currently suffers from limitations. Historically, early wind turbine motors were often directly connected to the power grid without matching drivers, objectively limiting the use of a crude control mode with fixed number of start / stop cycles and fixed time intervals. Although current technology has developed drive devices with speed-adjustable capabilities, the high cost of hardware modifications and users' avoidance of trial-and-error risks based on historical experience mean that many traditional start / stop control logics are still retained in practical applications. This user tendency to maintain the status quo prevents the system from fully utilizing hardware advantages, hindering true energy saving and precise adaptation. Specifically, the limitations of existing control strategies are mainly reflected in: 1. Rigid control modes and severe energy redundancy. Even if some equipment has speed-adjustable potential, the use of fixed start / stop strategies prevents the number of wind turbines from being dynamically and precisely adjusted based on real-time environmental parameters. This often results in situations where environmental parameters are close to target values, but the system still maintains a high number of wind turbines operating, causing significant energy waste. 2. The traditional periodic rotation or time-based start-stop logic suffers from delayed response and lacks real-time capability, ignoring real-time changes in environmental disturbances. During periods of high temperature or high ventilation demand, start-stop strategies are prone to lag, leading to excessive environmental parameters and impacting production process stability or environmental safety. Therefore, considering the dynamic characteristics of large-space environments and taking into full account users' concerns about retrofit costs and operational safety, there is an urgent need for an energy-saving control method that can dynamically adjust the number of fans in operation and optimize start-stop times. Summary of the Invention

[0003] To address the aforementioned technical problems, the present invention aims to provide an energy-saving optimization control method for wind turbine groups suitable for large-space controlled environments. This method solves the technical problems in the prior art where the start-stop control of motor-driven wind turbines adopts a crude mode with a fixed number of turbines on and a fixed time, lacking real-time response to dynamic environmental changes. This results in excessive energy consumption, inaccurate environmental control effects that do not accurately match actual needs, low system operating efficiency, further affecting the stability of the controlled environment, and increasing operation and maintenance costs.

[0004] This invention provides a wind turbine group control method based on air volume decoupling allocation, comprising the following steps:

[0005] S1 Parameter Initialization and Environmental Awareness: The system collects the average temperature in the current space through a temperature sensor and calculates the minimum ventilation volume of the system based on the effective geometric volume of the controlled environment and the preset minimum air exchange rate.

[0006] S2 calculates the target total air volume based on a piecewise linear model with dynamic temperature control bandwidth: it dynamically adjusts the temperature control bandwidth according to the seasonal pattern, determines the full-speed temperature in combination with the set temperature, and uses a piecewise function to calculate the real-time target total air volume to ensure that the ventilation volume is accurately matched with the temperature demand.

[0007] S3 performs integer allocation of total air volume for the wind turbine cluster based on the principle of optimal energy efficiency: treating the wind turbine cluster as a whole, it decouples the target total air volume into the number of wind turbines operating at their rated speed based on the rated air volume of each individual turbine. and residual air volume ;

[0008] S4 implements long-cycle intermittent control for surplus air volume: a control cycle is set for the unit allocated surplus air volume, the start-up time ratio is calculated based on the surplus air volume demand, and the running and stopping time of the motor is controlled within the cycle.

[0009] S5 implements a life-balanced scheduling and dead-zone protection mechanism based on spatial symmetry: it divides the space into zones according to the physical installation distribution of the wind turbine group in the controlled environment, monitors the cumulative operating time and current status of each device in real time, follows a scheduling strategy that prioritizes spatial balance and then life-balanced wear when responding to changes in the number of wind turbines, and implants dead-zone logic for intermittently operating wind turbines.

[0010] Preferably, the formula for calculating the minimum ventilation volume of the system in step S1 is as follows:

[0011]

[0012] in, This is the minimum ventilation volume for the system. For the effective geometric volume of the controlled environment, This is the preset minimum number of air exchanges. The unit is times per hour.

[0013] Preferably, step S2 includes the following steps:

[0014] Determine the full-speed temperature at which all fans need to operate at rated speed. :

[0015]

[0016] in, For the target temperature, The dynamic temperature control bandwidth; the dynamic temperature control bandwidth Dynamically adjust based on seasonal patterns;

[0017] Based on the current temperature, the real-time target total air volume is calculated using a piecewise function. :

[0018]

[0019] in, The real-time target total air volume, This is the maximum rated air volume when all fans in the system are fully operational. The current ambient temperature. This is the minimum ventilation volume for the system.

[0020] Preferably, in step S3, the number of fans operating at rated speed is determined. The calculation formula is as follows:

[0021]

[0022] in, For floor operations, This refers to the rated air volume of a single fan.

[0023] start up The typhoon fan operates at its rated speed with spare air volume. By the The formula for calculating the spare air volume for typhoon fans is as follows: .

[0024] Preferably, step S4 includes the following steps:

[0025] For the first Typhoon generators, calculate the proportion of time they will be turned on. :

[0026]

[0027] Set a control cycle on a minute-by-minute basis. During the control cycle Inside, control the first Typhoon operation Time, shutdown time.

[0028] Preferably, step S5 includes the following steps:

[0029] (1) Spatial zoning and monitoring: Based on the physical installation distribution of the wind turbine group, all wind turbines are divided into N symmetrical spatial zoning. The spatial zoning includes at least a core area, a middle area and an outer area. The cumulative running time and current status of each device are monitored in real time. N is a positive integer greater than or equal to 5.

[0030] (2) Increase the number of wind turbines: When the number of target wind turbines increases, firstly, based on the principle of symmetry, compare the current number of operating wind turbines in each spatial zone, lock the target spatial zone with the fewest operating wind turbines or the one that needs to be prioritized for operation, and then search all the dormant equipment in the target spatial zone, and select the one with the shortest cumulative operating time to start operation; if the current area is in an asymmetrical state, then the wind turbines in its spatially symmetrical position will be forcibly started; the priority start criteria can be set by the user, for example, if no wind turbines are running, then the wind turbines in the core area will be started first, and if the wind turbines in the core area are full, then the wind turbines in the outer area will be started first, and so on. Spatially symmetrical position refers to the geometric symmetry formed by the physical installation distribution of the wind turbine group in the controlled environment, which can be understood as axisymmetry here.

[0031] (3) Reduce wind turbine scheduling: When the number of target wind turbines decreases, the target space partition with the most operating units is locked according to the principle of symmetry. If a wind turbine with asymmetrical operation is found, the wind turbine in the symmetrical position is forced to be shut down first. If the current area is in a completely symmetrical operation state, the device with the longest cumulative operating time in the area is retrieved and shut down.

[0032] (4) Status Lock: When the number of target fans remains unchanged, the fans that were originally under intermittent control continue to maintain the current task.

[0033] Preferably, the dead-zone protection mechanism in step S5 is as follows:

[0034] For those undertaking intermittent tasks Typhoon generators, determining the proportion of times they are turned on. Size: when When the threshold is less than the preset minimum threshold, the first step is forcibly shut down. Typhoon machine; when When the value exceeds the preset maximum threshold, force the activation of the first step. The typhoon fan is kept running continuously; the minimum threshold value ranges from 5% to 15%, and the maximum threshold value ranges from 85% to 95%.

[0035] The present invention has the following beneficial effects:

[0036] 1. Achieving quasi-continuous adjustment effect at low cost: This invention adopts long-cycle intermittent control technology and utilizes the thermal and humid inertia of the large space environment itself. Without adding variable frequency hardware, it can simulate the quasi-continuous adjustment of the average air volume on a macroscopic level by simply controlling the on and off time ratio of the fixed frequency motor, thus solving the problem of poor step-like adjustment accuracy of traditional fixed frequency control.

[0037] 2. Extreme energy efficiency: The air volume decoupling and integer allocation strategy of this invention ensures that the vast majority of the system's fans always operate at the rated speed with the highest design efficiency, with only a single device bearing the fluctuating margin air volume, maximizing the overall energy conversion efficiency of the motor group and significantly reducing operating energy consumption.

[0038] 3. Uniform airflow distribution and balanced equipment lifespan: This invention introduces a scheduling mechanism based on spatial symmetry, prioritizing the balance of the number of fans in operation in the physical space, ensuring the uniformity and stability of airflow organization within the controlled space; at the same time, a lifespan balancing queue mechanism is established to dynamically rotate working units, preventing premature damage to individual devices due to long-term overuse; the unique start-stop dead zone protection mechanism effectively shields against minor environmental fluctuations, extending the service life of the actuators. Attached Figure Description

[0039] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram illustrating an application scenario of an embodiment of the present invention.

[0041] Figure 2 This is a schematic diagram of the physical layout and spatial partitioning of the wind turbine according to an embodiment of the present invention.

[0042] Figure 3 This is a flowchart illustrating an embodiment of the present invention.

[0043] Figure 4 This is a logic block diagram of an embodiment of the present invention.

[0044] Figure 5 This is a timing diagram for long-cycle control according to an embodiment of the present invention.

[0045] Figure 6 This is a schematic diagram of the lifetime balancing scheduling and dead zone protection mechanism based on spatial symmetry in an embodiment of the present invention. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Example

[0048] The following are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the following embodiments. All technical solutions that fall within the scope of the present invention are within the scope of protection of the present invention.

[0049] This invention provides a fan group control method based on airflow decoupling distribution, mainly applied to energy-saving control in large-space environments, including the following steps:

[0050] Step 1: Parameter initialization and environment awareness.

[0051] The system collects the average temperature within the current space using a temperature sensor, and then determines the effective geometric volume of the controlled environment. and the preset minimum number of air changes (Unit: times / hour), calculate the minimum ventilation volume of the system. This serves as the baseline for the safe operation of the system. The calculation formula is as follows:

[0052]

[0053] Step 2: Calculate the target total air volume based on a piecewise linear model with dynamic temperature control bandwidth.

[0054] First, determine the temperature at which all fans need to operate at their rated speed; define this as the full-speed temperature. , i.e., target temperature With dynamic temperature control bandwidth sum:

[0055]

[0056] The dynamic temperature control bandwidth Dynamically adjust based on seasonal patterns: automatically narrow bandwidth in summer to improve response speed, and automatically widen bandwidth in winter and transitional seasons to achieve smooth energy saving.

[0057] Then, combined with the current temperature The real-time target total air volume is calculated using the following piecewise function. :

[0058]

[0059] in, This is the maximum rated airflow when all system fans are fully operational. This step ensures precise matching and smooth transition of ventilation volume to temperature requirements.

[0060] Step 3: Perform integer allocation of the total air volume of the wind turbine cluster based on the principle of optimal energy efficiency.

[0061] Treating the fan group as a whole, based on the rated air volume of each individual fan. Determine the number of fans operating at rated speed. :

[0062]

[0063] in, This is for floor function. Start. Typhoon machine, this The typhoon fan is operating at full speed at its rated efficiency point. Reserve air volume. By the The typhoon generator's load is calculated using the following formula:

[0064]

[0065] Step 4: Implement long-cycle intermittent control for the remaining air volume.

[0066] For the unit that has been allocated the spare air volume (the first one) (For typhoon generators), the system does not employ voltage regulation or frequency conversion speed control, but instead uses a time-division strategy. A long control cycle on the order of minutes is set. Calculate the opening time ratio based on the remaining air volume requirement. :

[0067]

[0068] In the set long control cycle Inside, after the motor starts, the motor operation is controlled. Time, shutdown Time. By utilizing the thermal and humidity inertia of the environment, quasi-continuous adjustment of the average air volume is achieved, simulating a smooth adjustment effect without adding inverter hardware.

[0069] Step 5: Implement a lifetime balancing scheduling and dead zone protection mechanism based on spatial symmetry.

[0070] The system first divides all the wind turbines into N symmetrical spatial zones based on their physical installation distribution within the controlled environment, and then monitors the cumulative operating time and current status of each device in real time. When adjusting in response to changes in the target total air volume, the controller strictly follows a scheduling strategy that prioritizes spatial balance over lifespan wear.

[0071] The specific scheduling logic is as follows:

[0072] 1. When adding fans: The system first compares the current number of fans in each spatial zone according to the symmetry principle. This symmetry principle means that when dynamically adjusting fan start-up and shutdown, the system prioritizes balancing the number of fans in each spatial zone based on their physical distribution. By forcibly correcting asymmetrical operating states, the system ensures the uniformity and stability of airflow organization within the controlled large space. After satisfying the symmetry principle, the system automatically locks the spatial zone with the fewest operating fans as the target area. Then, it searches all dormant devices within this target area and selects the one with the shortest cumulative operating time to start operation or undertake a new intermittent operation task, thereby ensuring the uniform distribution of incremental airflow in the physical space.

[0073] 2. When reducing the number of fans: Based on the principle of symmetry, the system locks the space zone with the most operating fans and shuts down the equipment with the longest cumulative operating time in that area according to the first-in-first-out principle.

[0074] 3. When the number of fans remains unchanged: the state locking strategy is implemented, and the fans that were originally under intermittent control continue to maintain their current task and are not rotated due to slight differences in running time, so as to ensure system stability.

[0075] Furthermore, for fans performing intermittent tasks, the system incorporates dead-zone logic. This dead-zone logic means that for fans performing intermittent control of spare air volume, when the calculated operating time ratio is extremely small or extremely large, the system will force the fan to shut down or remain on to prevent frequent and ineffective start-stop operations caused by minor fluctuations in ambient temperature. When it is extremely small or extremely large, the first The forced shutdown or startup of typhoon fans prevents frequent and ineffective start-ups and shutdowns caused by minor fluctuations in ambient temperature, maximizing the overall service life of the equipment group while ensuring a uniform and stable airflow field.

[0076] The following are specific embodiments of the present invention:

[0077] Reference manual attached Figure 1 To be continued Figure 6This embodiment takes the livestock farming industry as an example, selecting a standalone pigsty housing 1000 fattening pigs in a large-scale pig farm as the application scenario. The effective geometric volume of the pigsty... for The preset minimum number of air changes The system operates at 10 times per hour and is equipped with 12 identical three-phase asynchronous motor-driven livestock fans for ventilation and cooling. The rated airflow of each fan is [missing information]. That is, the maximum total ventilation volume of the system. for The system sets the target temperature. The temperature is 25℃. The current season is summer, and the system automatically adjusts the dynamic temperature control bandwidth. The temperature is 3℃.

[0078] 1. Parameter initialization and environment awareness

[0079] The system collects the current average temperature inside the building using a temperature sensor. Based on these parameters, the minimum ventilation volume of the system is calculated.

[0080]

[0081] Minimum ventilation volume serves as the baseline for safe operation of the system.

[0082] 2. Calculation of the target total air volume based on a piecewise linear model with dynamic temperature control bandwidth.

[0083] First, determine the full-speed temperature. The full-speed temperature is obtained by summing the target temperature of 25℃ and the dynamic temperature control bandwidth of 3℃. ,Right now The bandwidth is automatically reduced according to the summer mode to improve response speed.

[0084] Subsequently, combined with the currently collected temperature The real-time target total air volume is calculated using a piecewise function. :

[0085]

[0086] This step calculates the target total air volume under the current operating conditions. .

[0087] 3. Perform integer-based allocation of total air volume for the wind turbine cluster based on the principle of optimal energy efficiency.

[0088] Treating the fan group as a whole, based on the rated air volume of each individual fan. The number of fans running at full speed is calculated using a formula. :

[0089]

[0090] This means that six fans will be started. These six fans will operate at their rated speed and at their highest efficiency.

[0091] Calculate the margin air volume :

[0092]

[0093] The remaining air volume is handled by the 7th fan.

[0094] 4. Implement long-cycle intermittent control for surplus air volume.

[0095] like Figure 5 The control timing is shown. For the 7th fan handling the spare air volume, the start-up time ratio is calculated. :

[0096]

[0097] Within a set long control cycle of 600 seconds, the motor runs for 450 seconds after starting and then stops for 150 seconds. Utilizing the thermal and humid inertia of the environment, quasi-continuous adjustment of the average airflow is achieved.

[0098] 5. Implement a lifetime equalization scheduling and dead zone protection mechanism based on spatial symmetry.

[0099] Scheduling logic as follows Figure 6 As shown. The system first according to Figure 2 The physical installation distribution of the 12 wind turbines shown divides them into three spatial zones: the core zone (containing turbines 3, 4, 9, and 10), the outer zone (containing turbines 1, 6, 7, and 12), and the middle zone (containing turbines 2, 5, 8, and 11). The cumulative operating time and current on / off status of each device are monitored in real time.

[0100] When adjusting in response to changes in the target total air volume, the controller strictly follows a scheduling strategy that prioritizes spatial symmetry and secondarily considers wear and tear.

[0101] When additional fans need to be activated: the system prioritizes activating the core area, followed by the outer areas, and lastly the middle area. When selecting a specific fan within a selected area, if the current area is symmetrical, the system automatically selects the fan with the shortest cumulative running time to activate; if the current area is asymmetrical, i.e., a fan is already running on one side, the system forcibly activates the fan at its spatially symmetrical position to prioritize restoring airflow balance.

[0102] When it is necessary to reduce the number of fans shut down: the system prioritizes shutting down the fans in the middle zone; if the middle zone is already completely shut down, then the outer zone fans are shut down, and finally the core zone fans are shut down. The logic for performing a shutdown operation within a selected area is as follows:

[0103] 1. Symmetry check: Scan the current area's operating status. If an asymmetrically operating fan is found, the fan in the symmetrical position will be forcibly shut down first, regardless of its operating time, to ensure that the system returns to a symmetrical operating state as quickly as possible.

[0104] 2. Life check: The system will only intervene in life check when the current area is in a completely symmetrical operating state, and will retrieve and shut down the wind turbine with the longest cumulative operating time in the area.

[0105] In addition, the first method involves intermittent control of the remaining air volume. Typhoon generators, with dead-zone logic embedded in the system, when the calculated start-up time ratio... or In such cases, the fan should be forcibly shut down or turned on to prevent frequent and ineffective start-ups and shutdowns caused by minor fluctuations in ambient temperature.

[0106] Through the above solution, the present invention can achieve precise matching between ventilation output and actual environmental conditions by dynamically adjusting the number of fans in operation and optimizing start-up and shutdown times, without relying on expensive frequency conversion modifications to the entire system, thus significantly improving the overall operating efficiency and energy-saving effect of the drive fan group.

[0107] The above description is merely a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention by those skilled in the art within the scope of the technology disclosed in the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A fan group control method based on decoupled airflow distribution, characterized in that, Includes the following steps: S1 Parameter Initialization and Environmental Awareness: The system collects the average temperature in the current space through a temperature sensor and calculates the minimum ventilation volume of the system based on the effective geometric volume of the controlled environment and the preset minimum air exchange rate. S2 calculates the target total air volume based on a piecewise linear model with dynamic temperature control bandwidth: it dynamically adjusts the temperature control bandwidth according to the seasonal pattern, determines the full-speed temperature in combination with the set temperature, and uses a piecewise function to calculate the real-time target total air volume to ensure that the ventilation volume is accurately matched with the temperature demand. S3 performs fan cluster total air volume integer allocation based on energy efficiency optimization principle: regarding the fan group as a whole, decoupling the target total air volume into the number of fans running at rated speed according to the rated air volume of a single fan and the balance air volume ; S4 implements long-cycle intermittent control for surplus air volume: a control cycle is set for the unit allocated surplus air volume, the start-up time ratio is calculated based on the surplus air volume demand, and the running and stopping time of the motor is controlled within the cycle. S5 implements a lifespan balancing scheduling and dead zone protection mechanism based on spatial symmetry: It divides the space into zones according to the physical installation distribution of the wind turbine group in the controlled environment, monitors the cumulative operating time and current status of each device in real time, and follows a scheduling strategy that prioritizes spatial balancing and then lifespan wear when responding to changes in the number of wind turbines. Dead zone logic is also implemented for wind turbines operating intermittently. The dead zone protection mechanism is specifically as follows: for the first wind turbine undertaking intermittent tasks... Typhoon generators, determining the proportion of times they are turned on. Size: when When the value is less than the preset minimum threshold, force shutdown; Typhoon machine; when When the value exceeds the preset maximum threshold, force the activation of the first step. The typhoon fan is kept running continuously; the minimum threshold value ranges from 5% to 15%, and the maximum threshold value ranges from 85% to 95%.

2. The fan group control method based on wind volume decoupling distribution according to claim 1, characterized in that, The formula for calculating the minimum ventilation volume of the system in step S1 is as follows: wherein, is the minimum ventilation of the system, is the effective geometric volume of the controlled environment, is the preset minimum air changes, in units of 1 / hour.

3. The fan population control method based on wind volume decoupling distribution according to claim 1, characterized in that, Step S2 includes the following steps: Full speed temperature at which all the fans are required to run at rated speed : wherein, target temperature, dynamic temperature control bandwidth; the dynamic temperature control bandwidth is dynamically adjusted according to seasonal patterns; In combination with the current temperature, the real-time target total air volume is calculated by using a piecewise function : wherein, is the real-time target total air volume, is the maximum rated air volume of all the air fans in the system when all the air fans are fully opened, is the current ambient temperature, is the minimum ventilation volume of the system.

4. The fan population control method based on wind volume decoupling distribution according to claim 1, characterized in that, The step S3 determines the number of fans operating at rated speed The calculation formula is as follows: in, For floor operations, This refers to the rated air volume of a single fan. Start The typhoon machine runs at rated speed, and the excess air volume By the first The typhoon machine bears, and the excess air volume calculation formula is: .

5. The fan population control method based on wind volume decoupling distribution according to claim 4, characterized in that, Step S4 includes the following steps: To the Typhoon machine, calculate the opening time ratio : Setting a minute-level control cycle Within the control cycle , the first air conditioner is operated for a certain time, and stopped for a certain time.

6. The fan group control method based on air volume decoupling distribution according to claim 1, characterized in that, Step S5 includes the following steps: (1) Spatial zoning and monitoring: Based on the physical installation distribution of the wind turbine group, all wind turbines are divided into N symmetrical spatial zoning. The spatial zoning includes at least a core area, a middle area and an outer area. The cumulative running time and current status of each device are monitored in real time. N is a positive integer greater than or equal to 5. (2) Increase the number of wind turbines: When the number of target wind turbines increases, first compare the current number of operating units in each spatial partition according to the principle of symmetry, lock the target spatial partition with the fewest operating units or the one that needs to be opened first, then search all the dormant equipment in the target spatial partition, and select the one with the shortest cumulative running time to start operation; if the current area is in an asymmetrical state, then force the wind turbines in its symmetrical position to start. (3) Reduce wind turbine scheduling: When the number of target wind turbines decreases, the target space partition with the most operating units is locked according to the principle of symmetry. If a wind turbine with asymmetrical operation is found, the wind turbine in the symmetrical position is forced to be shut down first. If the current area is in a completely symmetrical operation state, the device with the longest cumulative operating time in the area is retrieved and shut down. (4) Status Lock: When the number of target fans remains unchanged, the fans that were originally under intermittent control continue to maintain the current task.

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