Cyclic switching control method and system, storage medium and equipment

Abstract

The invention discloses a cyclic switching control method and system, a storage medium and equipment, the system comprises a data acquisition unit, a data processing unit, a data storage unit and a control unit, the data acquisition unit and the data storage unit are respectively in communication connection with the data storage unit, and the data storage unit is in communication connection with the control unit. According to the invention, the adjustment parameter and the adjustable parameter are introduced, the adjustment parameter is associated with the historical power factor in the same period, the power factor at the same time point in the previous statistical period and the power factor at the current time point, the fluctuation of the power factor is converted into the quantifiable parameter, and the power factor predicted value is corrected by using the adjustment parameter. Prediction errors caused by fluctuation of power factors are reduced, and the accuracy of switching operation control of cyclic switching is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of reactive power compensation, and more particularly to a cyclic switching control method, system, storage medium and device. Background Art

[0002] In order to ensure the power efficiency of the power grid, reduce the energy loss in transformers or transmission lines, thereby improving the power supply efficiency and optimizing the power consumption environment, people usually maintain the power factor of the power grid above a reasonable level. However, since the electrical equipment connected to the power grid will not be in working condition for a long time, the shutdown of the electrical equipment will cause the power factor of the power grid to decrease. Once a large number of electrical equipment are shut down, the power factor of the power grid will drop below a reasonable level, which will lead to a decrease in the power efficiency of the power grid, and the energy loss of transformers and transmission lines will also increase accordingly. Therefore, in order to reduce the power consumption of the power grid and make the power consumption more stable, people improve the power factor of the power grid by performing reactive power compensation on the power grid, thereby eliminating the impact of the decrease in the power factor of the power grid. There are many ways to compensate for reactive power, such as centralized compensation, group compensation, and on-site compensation for a single motor.

[0003] Cyclic switching is a control strategy for switching reactive power compensation devices, which aims to ensure that the operating time of each group of capacitors is balanced, thereby extending their service life. However, the switching timing of reactive power compensation devices is usually based on whether the power factor exceeds the threshold range. This makes it impossible for the power grid to always supply power within a certain power factor range, resulting in unstable power quality of the power grid. Therefore, people began to predict the power factor of the power grid based on historical data, and use the predicted power factor to pre-regulate the power factor of the power grid. However, the existing power factor prediction method of the power grid has a large deviation between the predicted value and the actual value. The reason is that the power factor fluctuation of the power grid cannot be reflected in the prediction process. Summary of the invention

[0004] To this end, the technical problem to be solved by the present invention is to provide a cyclic switching control method, system, storage medium and device, by introducing adjustment parameters and adjustable parameters, and associating the adjustment parameters with the historical power factor of the same period, the power factor at the same time point in the previous statistical period and the power factor at the current time point, the fluctuation of the power factor is converted into a quantifiable parameter, and the adjustment parameters are used to correct the power factor prediction value, so as to reduce the prediction error caused by the fluctuation of the power factor and improve the accuracy of the switching operation control of the cyclic switching.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A cyclic switching control method comprises the following steps: S1) Data collection: Collect the power factor cosφ2 of the power grid at the current power-on time, the most recent operation time t1 and the most recent cut-off time t2 of the cycle switching module; S2) Data processing: Calculate the most recent operation time of the cyclic switching unit based on the most recent operation time t1 and the most recent cut-out time t2 of the cyclic switching module. and the most recent cut-out duration , and according to the latest operation time Size and last cut-out duration The cyclic switching modules are sorted according to the size of the power factor cosφ0 of the historical power grid at the current time point and the power factor cosφ1 of the power grid at the same time point in the previous statistical cycle. The power factor cosφ3 of the power grid in the time period of T after the current time point is predicted, where cosφ3 is calculated by the following formula: In the formula, The actual power factor of the power grid at the same time point in the statistical period before the prediction time point; To predict the reactive power compensation power factor at the time point; To adjust the parameters, the value range is [λ1,λ2], where λ1 and λ2 are calculated by the following formulas: In the formula, The actual power factor of the power grid in the same period of history at the current time point; The actual power factor of the power grid at the same time point in the statistical period before the prediction time point; is the actual power factor of the power grid at the current time point; x is an adjustable parameter with a value range of (1,2]; S3) When cosφ3 is greater than the upper threshold, the cyclic switching module is switched out and the most recent operation time is The longer cycle switching module is switched out first. When cosφ3 is less than the lower limit of the threshold, the cycle switching module is put into operation, and the idle and recently switched out module is Modules with longer switching cycles are put into operation first.

[0006] In the above-mentioned cyclic switching control method, in step S3), the power factor of the power grid after the cyclic switching module is put into operation is The following inequality should be satisfied: In the formula, It is the power factor of the power grid at the same time point in the statistical period before the prediction time point.

[0007] In the above-mentioned cyclic switching control method, in step S3), the power factor of the power grid after the cyclic switching module is switched out is The following inequality should be satisfied: In the formula, It is the power factor of the power grid at the same time point in the statistical period before the prediction time point.

[0008] In the above-mentioned cyclic switching control method, in step S2, the data collected at each collection time point in the statistical cycle at the current time point are Draw the actual power factor change curve within the statistical period at the current time point, compare the actual power factor change curve within the statistical period at the current time point with the actual power factor change curve of the same period in history, and output the comparison result; In step S3), based on the comparison result between the actual power factor change curve in the statistical period at the current time point obtained in step S2) and the actual power factor change curve in the same period in history, the switching operation of the cyclic switching module is delayed or advanced. The specific strategy is: a) When the actual power factor change curve in the statistical period at the current time point is shifted forward by more than or equal to 60 seconds relative to the actual power factor change curve in the same period in history, the switching operation of the cyclic switching module is advanced according to the preset cyclic switching module switching strategy; b) When the actual power factor change curve in the statistical period at the current time point is shifted back by more than or equal to 60 seconds relative to the actual power factor change curve in the same period in history, the switching operation of the cyclic switching module is delayed according to the preset cyclic switching module switching strategy; c) When the actual power factor change curve within the statistical period at the current time point is less than 60 seconds ahead of the actual power factor change curve in the same historical period, or the actual power factor change curve within the statistical period at the current time point is less than 60 seconds behind the actual power factor change curve in the same historical period, the switching operation is performed normally according to the preset cyclic switching module switching strategy.

[0009] In the above-mentioned cyclic switching control method, in strategy a), when the cyclic switching module is switched in advance, the advance time is calculated by the following formula: : In the formula, It is the length of time that the actual power factor change curve in the statistical period at the current time point moves forward relative to the actual power factor change curve in the same period in history; m and n are both natural numbers, and n≥2m.

[0010] In the above-mentioned cyclic switching control method, in strategy b), when the cyclic switching module is delayed, the delay time is calculated by the following formula: : In the formula, It is the length of time that the actual power factor change curve in the statistical period at the current time point moves forward relative to the actual power factor change curve in the same period in history; α is the control parameter, and its value range is [1,4].

[0011] In the above cycle switching control method, the value range of α is [1.5,2].

[0012] A system for performing cyclic switching control using the above cyclic switching control method comprises: The data acquisition unit is used to collect in real time the power factor cosφ2 of the power grid at the current power-on time point, the most recent operation time point t1 of the cycle switching module, and the most recent switch-off time point t2; A data processing unit, used for processing the data collected by the data collection unit; A data storage unit, used to store the data collected by the data collection unit and the data processing results of the data processing unit; A control unit, used for controlling the switching operation of the cyclic switching unit according to the data processing result of the data processing unit; The data acquisition unit and the data storage unit are respectively connected to the data storage unit for communication, and the data storage unit is connected to the control unit for communication.

[0013] A computer-readable storage medium stores a computer program, which implements the above-mentioned cyclic switching control method when executed by a processor.

[0014] A computer device comprises a readable storage medium, a processor and a computer program stored in the readable storage medium and executable on the processor, wherein the computer program implements the above-mentioned cyclic switching control method when executed by the processor.

[0015] The technical solution of the present invention achieves the following beneficial technical effects: 1. The present invention introduces adjustment parameters and associates the adjustment parameters with the power factor at the current time point, the power factor at the current time point in the same historical period, and the power factor at the same time point in the previous statistical period of the current time point, and quantifies them at the same time, observes and integrates the fluctuation of the power factor from the direction of the historical period and the adjacent period, ensures that the fluctuation of the power factor can be considered from the perspective of periodicity and development, which is conducive to more accurate prediction of the change of the power factor, ensures the precise control of the switching operation of the cyclic switching module, and avoids the adjusted power factor being lower than or exceeding the threshold range due to the switching operation of the cyclic switching module.

[0016] 2. In view of the fact that the advancement or lag of the power factor change curve will affect the prediction of the power factor, and thus affect the switching operation of the cyclic switching module, the present invention also proposes a solution to the problem caused by the advancement or lag of the power factor change curve, thereby avoiding the power factor prediction error caused by the advance or lag of the power factor change, and improving the accuracy of the switching timing of the cyclic switching module. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the working principle of the cycle switching control system; Figure 2 It is a flow chart of the cyclic switching control method; Figure 3 The schematic diagram of a computer device capable of performing cyclic switching control. DETAILED DESCRIPTION

[0018] In order to ensure the stability of the power quality of the power grid, people usually keep the power factor of the power grid within a preset threshold range. When the power factor of the power grid is lower than the lower limit of the preset threshold range, a reactive power compensation device will be put into operation to improve the power factor of the power grid. When the power factor of the power grid is higher than the upper limit of the preset threshold range, the reactive power compensation device in operation will be cut off from the power grid. However, the real-time monitoring of the power factor of the power grid has a certain lag relative to the change of the power factor of the power grid, which causes the switching operation of the reactive power compensation device to have a certain lag, which will affect the power supply stability of the power grid. Therefore, the present invention provides a cyclic switching control system to ensure that the power grid can supply power when the power factor of the power grid is maintained within the preset threshold range.

[0019] like Figure 1 As shown, the cyclic switching control system in the present invention includes a data acquisition unit, a data processing unit, a data storage unit and a control unit. The data acquisition unit and the data storage unit are respectively communicated with the data storage unit, and the data storage unit is communicated with the control unit.

[0020] Among them, the data acquisition unit is used to collect the power factor cosφ2 of the power grid at the current time point, the most recent operation time point t1 and the most recent cut-out time point t2 of the cycle switching module in real time, and can also be used to collect the working state parameters of the capacitor in the cycle switching module, such as voltage, temperature, etc. Specifically, different sensors, instruments, etc. can be set according to needs to collect data; the data processing unit is used to process the relevant data collected by the data acquisition unit according to needs to meet the requirements of the control unit to operate according to the processing results; the data storage unit is used to store the data collected by the data acquisition unit and the data processing results of the data processing unit; the control unit is used to control the switching operation of the cycle switching unit according to the data processing results of the data processing unit.

[0021] In terms of the control of the power factor of the power grid, the power factor of the power grid is controlled within the preset threshold range, so that the power factor of the power grid will not be lower than the lower limit required by the industry, nor higher than 1, so as to ensure the quality of the power supply of the power grid. This requires that reactive power compensation devices be put into the power grid before the power factor of the power grid decreases and decreases to below the lower limit required by the industry, and that the reactive power compensation devices put into operation in the power grid be removed before the power factor of the power grid increases to 1. Based on this requirement, if Figure 2 As shown, the cyclic switching control system of the present invention is used to implement the switching control of the cyclic switching module through the following steps: S1) Data collection: Collect the grid power factor cosφ2 at the current power time point, the most recent operation time point t1 and the most recent cut-out time point t2 of the cycle switching module; S2) Data processing: Calculate the most recent operation time of the cyclic switching unit based on the most recent operation time t1 and the most recent cut-out time t2 of the cyclic switching module. and the most recent cut-out duration , and according to the latest operation time Size and last cut-out duration The cyclic switching modules are sorted according to the size of the power factor cosφ0 of the historical power grid at the current time point and the power factor cosφ1 of the power grid at the same time point in the previous statistical cycle. The power factor cosφ3 of the power grid in the time period of T after the current time point is predicted, where cosφ3 is calculated by the following formula: In the formula, The actual power factor of the power grid at the same time point in the statistical period before the prediction time point; To predict the reactive power compensation power factor at the time point; To adjust the parameters, the value range is [λ1,λ2], where λ1 and λ2 are calculated by the following formulas: In the formula, The actual power factor of the power grid in the same period of history at the current time point; The actual power factor of the power grid at the same time point in the statistical period before the prediction time point; is the actual power factor of the power grid at the current time point; x is an adjustable parameter with a value range of (1,2]; S3) When cosφ3 is greater than the upper threshold, the cyclic switching module is switched out and the most recent operation time is The longer cycle switching module is switched out first. When cosφ3 is less than the lower limit of the threshold, the cycle switching module is put into operation, and the idle and recently switched out module is Modules with longer switching cycles are put into operation first.

[0022] In the present invention, when predicting the power factor of the power grid at the prediction time point, the As an adjustment parameter, its purpose is to eliminate or weaken the impact of irregular fluctuations in the power factor of the power grid. Specifically, the replacement of power equipment or the increase in its number may cause changes in the actual power factor of the power grid. This change is not caused by the start and stop of power equipment. If the impact of this change is not eliminated, it will lead to a certain deviation in the prediction of the power factor of the power grid at a certain point in the future. This deviation will cause the actual power factor of the power grid at a certain point in the future to be lower than the lower limit required by the industry or greater than or equal to 1, which requires a temporary change in the switching strategy of the cyclic switching module. The introduction of the adjustment parameter After that, the impact of irregular fluctuations in the power factor of the power grid can be eliminated or weakened, so that the actual power factor of the power grid at a certain point in the future can still be above the lower limit required by the industry and not greater than 1, and the power grid can also provide stable power supply.

[0023] In view of the fact that the power factor of the power grid will change with the increase or decrease of the power-consuming equipment connected to the grid, in addition to limiting the power grid to supply power when the power factor of the power grid is within the preset threshold range, in order to ensure that the power factor of the power grid after the switching operation of the cyclic switching module does not exceed the industry requirement range due to fluctuations, the strategy adopted by the present invention is: (1) In step S3), the power factor of the power grid after the cyclic switching module is put into operation The following inequality should be satisfied: In the formula, The power factor of the power grid at the same time point in the statistical period before the prediction time point; (2) In step S3), the power factor of the power grid after the cyclic switching module is switched out is The following inequality should be satisfied: In the formula, It is the power factor of the power grid at the same time point in the statistical period before the prediction time point.

[0024] In addition, the adjustment of the start and stop time of the power equipment in the power grid may cause the power factor fluctuation curve of the power grid to move forward or lag, which will also affect the prediction of the power factor of the power grid at a certain point in the future, and thus affect the switching operation of the cyclic switching module. In view of this, when the power factor fluctuation curve of the power grid moves forward or lags on the time axis, the predicted value of the power factor of the power grid will not change significantly. In this case, it is only necessary to process the switching operation of the cyclic switching module according to the following strategy: In step S2, the data collected at each collection time point in the statistical cycle of the current time point is Draw the actual power factor change curve within the statistical period at the current time point, compare the actual power factor change curve within the statistical period at the current time point with the actual power factor change curve of the same period in history, and output the comparison result; In step S3), based on the comparison result between the actual power factor change curve in the statistical period at the current time point obtained in step S2) and the actual power factor change curve in the same period in history, the switching operation of the cyclic switching module is delayed or advanced. The specific strategy is: a) When the actual power factor change curve in the statistical period at the current time point is shifted forward by more than or equal to 60 seconds relative to the actual power factor change curve in the same period in history, the switching operation of the cyclic switching module is advanced according to the preset cyclic switching module switching strategy; when the cyclic switching module is switched in advance, the advance time is calculated by the following formula: : In the formula, It is the length of time that the actual power factor change curve in the statistical period at the current time point moves forward relative to the actual power factor change curve in the same period in history; m and n are both natural numbers, and n≥2m; b) When the actual power factor change curve in the statistical period at the current time point is shifted back by more than or equal to 60s relative to the actual power factor change curve in the same period in history, the switching operation of the cyclic switching module is delayed according to the preset cyclic switching module switching strategy; when the cyclic switching module is delayed, the delay time is calculated by the following formula: : In the formula, is the length of time that the actual power factor change curve in the statistical period at the current time point moves forward relative to the actual power factor change curve in the same period in history; α is a control parameter, and the value range is [1,4]. Preferably, the value range of α is [1.5,2]; c) When the actual power factor change curve within the statistical period at the current time point is less than 60 seconds ahead of the actual power factor change curve in the same historical period, or the actual power factor change curve within the statistical period at the current time point is less than 60 seconds behind the actual power factor change curve in the same historical period, the switching operation is performed normally according to the preset cyclic switching module switching strategy.

[0025] When the power factor fluctuation curve of the power grid moves forward, the cyclic switching module is switched in advance, which can effectively prevent the power factor of the power grid from decreasing or increasing in advance to exceed the preset threshold range at a certain time point in the future. The advance time is shorter than the delay time, and its purpose is to avoid the switching operation changes caused by the sudden increase or decrease of the power factor of the power grid. The delay time is longer in order to reduce the switching frequency of the cyclic switching module and reduce the impact of current shock on the capacitor, which is beneficial to extend the service life of the capacitor.

[0026] Based on the above-mentioned cyclic switching control method, correspondingly, a computer-readable storage medium storing a computer program is also provided in this example, and when the computer program is executed by a processor, the following steps are implemented: collecting the grid power factor cosφ2 at the current power time point, the most recent operation time point t1 and the most recent cut-out time point t2 of the cyclic switching module, and then calculating the most recent operation time of the cyclic switching unit according to the most recent operation time point t1 and the most recent cut-out time point t2 of the cyclic switching module and the most recent cut-out duration , and according to the latest operation time Size and last cut-out duration The cyclic switching modules are sorted by the size of the power factor cosφ0 of the historical power grid at the current time point and the power factor cosφ1 of the power grid at the same time point in the previous statistical cycle. The power factor cosφ3 of the power grid in the time period T after the current time point is predicted. Then, when cosφ3 is greater than the upper threshold, the output is used to cut out the cyclic switching module. The longer cycle switching module is switched out first. When cosφ3 is less than the lower limit of the threshold, the output is used to start the cycle switching module. Modules with longer switching cycles are put into operation first.

[0027] like Figure 3 As shown, based on the above-mentioned cyclic switching control method and computer-readable storage medium, in this embodiment, a computer device is also provided, which includes a readable storage medium, a processor, and a computer program stored on the readable storage medium and executable on the processor, wherein the readable storage medium and the processor are both arranged on a bus, and the processor implements the following steps when executing the computer program: collecting the grid power factor cosφ2 at the current power time point, the most recent operation time point t1 and the most recent cut-out time point t2 of the cyclic switching module, and then calculating the most recent operation time of the cyclic switching unit according to the most recent operation time point t1 and the most recent cut-out time point t2 of the cyclic switching module and the most recent cut-out duration , and according to the latest operation time Size and last cut-out duration The cyclic switching modules are sorted by the size of the power factor cosφ0 of the historical power grid at the current time point and the power factor cosφ1 of the power grid at the same time point in the previous statistical cycle. The power factor cosφ3 of the power grid in the time period T after the current time point is predicted. Then, when cosφ3 is greater than the upper threshold, the output is used to cut out the cyclic switching module. The longer cycle switching module is switched out first. When cosφ3 is less than the lower limit of the threshold, the output is used to start the cycle switching module. Modules with longer switching cycles are put into operation first.

[0028] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the claims of this patent application.

Claims

1. A cyclic switching control method, characterized in that: The steps include: S1) Data collection: Collect the power factor cosφ2 of the power grid at the current power-on time, the most recent operation time t1 and the most recent cut-off time t2 of the cycle switching module; S2) Data processing: Calculate the most recent operation time of the cyclic switching unit based on the most recent operation time t1 and the most recent cut-out time t2 of the cyclic switching module. and the most recent cut-out duration , and according to the latest operation time Size and last cut-out duration Sort the cyclic switching modules by their size; The power factor cosφ3 of the power grid in the time period T after the current time point is predicted based on the power factor cosφ0 of the power grid in the same period of the history at the current time point and the power factor cosφ1 of the power grid at the same time point in the previous statistical cycle. Among them, cosφ3 is calculated by the following formula: In the formula, The actual power factor of the power grid at the same time point in the statistical period before the prediction time point; To predict the reactive power compensation power factor at the time point; To adjust the parameters, the value range is [λ1,λ2], where λ1 and λ2 are calculated by the following formulas: In the formula, The actual power factor of the power grid in the same period of history at the current time point; The actual power factor of the power grid at the same time point in the previous statistical period before the current time point; is the actual power factor of the power grid at the current time point; x is an adjustable parameter with a value range of (1,2]; S3) When cosφ3 is greater than the upper threshold, the cyclic switching module is switched out and the most recent operation time is The longer cycle switching module is switched out first. When cosφ3 is less than the lower limit of the threshold, the cycle switching module is put into operation, and the idle and recently switched out module is Modules with longer switching cycles are put into operation first.

2. The cyclic switching control method according to claim 1, characterized in that: In step S3), the power factor of the power grid after the cyclic switching module is put into operation The following inequality should be satisfied: In the formula, It is the power factor of the power grid at the same time point in the statistical period before the prediction time point.

3. The cyclic switching control method according to claim 1, characterized in that: In step S3), the power factor of the power grid after the cyclic switching module is switched out is The following inequality should be satisfied: In the formula, It is the power factor of the power grid at the same time point in the statistical period before the prediction time point.

4. The cyclic switching control method according to claim 1, characterized in that: In step S2, the data collected at each collection time point in the statistical cycle of the current time point is Draw the actual power factor change curve within the statistical period at the current time point, compare the actual power factor change curve within the statistical period at the current time point with the actual power factor change curve of the same period in history, and output the comparison result; In step S3), based on the comparison result between the actual power factor change curve in the statistical period at the current time point obtained in step S2) and the actual power factor change curve in the same period in history, the switching operation of the cyclic switching module is delayed or advanced. The specific strategy is: a) When the actual power factor change curve in the statistical period at the current time point is shifted forward by more than or equal to 60 seconds relative to the actual power factor change curve in the same period in history, the switching operation of the cyclic switching module is advanced according to the preset cyclic switching module switching strategy; b) When the actual power factor change curve in the statistical period at the current time point is shifted back by more than or equal to 60 seconds relative to the actual power factor change curve in the same period in history, the switching operation of the cyclic switching module is delayed according to the preset cyclic switching module switching strategy; c) When the actual power factor change curve within the statistical period at the current time point is less than 60 seconds ahead of the actual power factor change curve in the same historical period, or the actual power factor change curve within the statistical period at the current time point is less than 60 seconds behind the actual power factor change curve in the same historical period, the switching operation is performed normally according to the preset cyclic switching module switching strategy.

5. The cyclic switching control method according to claim 4, characterized in that: In strategy a), when the cyclic switching module is switched in advance, the advance time is calculated by the following formula: : In the formula, It is the length of time that the actual power factor change curve in the statistical period at the current time point moves forward relative to the actual power factor change curve in the same period in history; m and n are both natural numbers, and n≥2m.

6. The cyclic switching control method according to claim 4, characterized in that: In strategy b), when the cycle switching module is delayed, the delay time is calculated by the following formula: : In the formula, It is the length of time that the actual power factor change curve in the statistical period at the current time point moves forward relative to the actual power factor change curve in the same period in history; α is the control parameter, and its value range is [1,4].

7. The cyclic switching control method according to claim 6, characterized in that: The value range of α is [1.5,2].

8. A system for performing cyclic switching control using the cyclic switching control method according to claim 1, characterized in that: include: The data acquisition unit is used to collect in real time the power factor cosφ2 of the power grid at the current power-on time point, the most recent operation time point t1 of the cycle switching module, and the most recent switch-off time point t2; A data processing unit, used for processing the data collected by the data collection unit; A data storage unit, used to store the data collected by the data collection unit and the data processing results of the data processing unit; A control unit, used for controlling the switching operation of the cyclic switching unit according to the data processing result of the data processing unit; The data acquisition unit and the data storage unit are respectively connected to the data storage unit for communication, and the data storage unit is connected to the control unit for communication.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the cyclic switching control method described in any one of claims 1 to 7 is implemented.

10. A computer device comprising a readable storage medium, a processor, and a computer program stored in the readable storage medium and executable on the processor, characterized in that: When the computer program is executed by a processor, the cyclic switching control method described in any one of claims 1 to 7 is implemented.

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