Elevator energy-saving driving control method with power grid reactive power treatment function

Abstract

The invention relates to the technical field of power electronics, and discloses an elevator energy-saving driving control method with a power grid reactive power treatment function, which comprises the following steps: S1, monitoring the running state of an elevator in real time according to an elevator energy-saving box, S2, establishing a first driving power prediction model to predict the driving power required by the elevator, and S3, determining the driving power required by the elevator; s3, establishing a second driving power prediction model to predict the driving power provided by the power grid, S4, judging whether reactive power compensation is needed or not through a compensation judgment model, S5, receiving a reactive power compensation instruction to calculate a reactive power compensation index, and S6, performing reactive power compensation capacity calculation based on the reactive power compensation index. And S7, reactive power compensation for elevator energy-saving driving is completed, the driving power needed by the elevator and the driving power provided by a power grid are accurately predicted by monitoring the running state of the elevator in real time, and therefore accurate control over elevator energy-saving driving is achieved.

Description

Technical Field

[0001] The present invention relates to the field of power electronics technology, and more specifically to an elevator energy-saving drive control method with a power grid reactive power management function. Background Art

[0002] With the acceleration of urban construction and the continuous emergence of high-rise buildings, the demand for elevators has increased rapidly. However, elevators consume a lot of electricity during operation, becoming an important part of building energy consumption. In the power system, reactive power is one of the important factors to maintain the stable operation of the power grid. However, a large number of loads require reactive power output. If artificial reactive power compensation is not performed, the capacity of the power supply line needs to be increased, which not only increases the line loss, but also reduces the equipment utilization rate. Therefore, reactive power compensation for the power grid and improving the operation quality of the power grid has become an important research direction.

[0003] In order to solve the problems of elevator energy consumption and grid reactive power, elevator energy-saving drive control technology has been rapidly developed. Traditional elevator drive control methods often only focus on the operating efficiency and comfort of elevators, but ignore energy saving and reactive power management issues. Elevator energy-saving boxes can feed back the regenerative electric energy generated in the process of motor speed regulation to the grid, avoiding the energy loss caused by resistor heating when using conventional energy-consuming brake units. However, traditional elevator energy-saving drive control technology cannot accurately adjust reactive power compensation according to real-time data, resulting in large reactive power loss during elevator operation, affecting the operating quality and energy utilization efficiency of the grid. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an elevator energy-saving drive control method with a grid reactive power management function to solve the problems existing in the above-mentioned background technology.

[0005] The present invention provides the following technical solution: an elevator energy-saving drive control method with a power grid reactive power management function, comprising the following steps: Step S1: Real-time monitoring of the elevator operation status based on the elevator energy-saving box: connecting the elevator energy-saving box to the elevator control cabinet, monitoring the elevator operation status in real time through the elevator energy-saving box, and collecting elevator operation data; Step S2: Establishing a first driving power prediction model to predict the driving power required by the elevator: Establishing a first driving power prediction model, inputting the elevator operation data into the model, and predicting the driving power required by the elevator based on the elevator operation data; Step S3: Establishing a second driving power prediction model to predict the driving power provided by the power grid: monitoring the operating status of the power grid in real time through the power grid monitoring equipment to collect power grid operation data, and establishing a second driving power prediction model to predict the driving power provided by the power grid; Step S4: judging whether reactive power compensation is required by a compensation judgment model: establishing a compensation judgment model based on the prediction results of the first driving power prediction model and the second driving power prediction model to judge whether reactive power compensation is required for the elevator; Step S5: receiving a reactive power compensation instruction and calculating a reactive power compensation index: receiving a reactive power compensation instruction, establishing a reactive power compensation index calculation mathematical model, and obtaining a reactive power compensation index based on the prediction results of the first driving power prediction model and the second driving power prediction model; Step S6: Calculate reactive power compensation capacity based on reactive power compensation index: input reactive power compensation index as a variable into reactive power compensation capacity analysis model to obtain reactive power compensation capacity; Step S7: completing reactive power compensation for the elevator energy-saving drive: the elevator energy-saving box receives reactive power compensation capacity and completes reactive power compensation for the elevator energy-saving drive.

[0006] Preferably, in step S1, the elevator operating status is monitored in real time by an elevator energy-saving box, and elevator operating data is collected. The elevator operating data includes: the tension value when the elevator moves, the maximum value of the standard load-bearing mass of the elevator, the average speed when the elevator moves, and the driving efficiency of the elevator drive system.

[0007] Preferably, in step S2, a first driving power prediction model is established, the elevator operation data is output to the model, and the driving power required by the elevator is predicted based on the elevator operation data. The calculation formula of the first driving power prediction model is: ,in represents the predicted value of the driving power required by the elevator, represents the elevator moving resistance coefficient, Indicates the tension value when the elevator is moving. represents the friction coefficient of elevator movement, Indicates the maximum value of the standard load-bearing mass of the elevator. represents the acceleration due to gravity, represents the average speed of the elevator when it moves, Indicates the driving efficiency of the elevator drive system.

[0008] Preferably, in step S3, the grid operation data is collected by real-time monitoring of the grid operation status through a grid monitoring device, and a second driving power prediction model is established to predict the driving power provided by the grid. The calculation formula of the second driving power prediction model is: ,in It represents the predicted value of driving power provided by the power grid. Indicates the standard voltage value provided by the power grid. Indicates the standard value of current provided by the power grid. Indicates the power factor of the power grid.

[0009] Preferably, in step S4, the specific contents of establishing a compensation judgment model based on the prediction results of the first driving power prediction model and the second driving power prediction model to judge whether reactive power compensation is required for the elevator are as follows: Step S41: establishing a compensation judgment model based on the prediction results of the first driving power prediction model and the second driving power prediction model, wherein the compensation judgment model is expressed as: ,in Indicates the difference between the predicted value of the driving power required by the elevator and the predicted value of the driving power provided by the power grid. represents the predicted value of the driving power required by the elevator, Indicates the predicted value of driving power provided by the power grid; Step S42: Determine whether reactive power compensation is required for the elevator based on the difference between the predicted value of the driving power required by the elevator and the predicted value of the driving power provided by the power grid: If the difference between the predicted value of the driving power required by the elevator and the predicted value of the driving power provided by the power grid is , then it is determined that there is no need to compensate for the reactive power of the elevator. If the difference between the predicted value of the driving power required by the elevator and the predicted value of the driving power provided by the power grid is , it is determined that reactive power compensation is required for the elevator.

[0010] Preferably, in step S5, the specific contents of receiving a reactive power compensation instruction, establishing a reactive power compensation index calculation mathematical model, and deriving a reactive power compensation index based on the prediction results of the first driving power prediction model and the second driving power prediction model are as follows: Step S51: Calculate a reactive power compensation factor based on the power difference based on the prediction results of the first driving power prediction model and the second driving power prediction model, and the calculation formula is: ,in represents the reactive power compensation factor based on the power difference, represents the predicted value of the driving power required by the elevator, Indicates the predicted value of driving power provided by the power grid; Step S52: Reactive power compensation factor The reactive power compensation index before reactive power compensation is obtained by inputting it as a variable into the reactive power compensation index calculation model. The calculation formula is: ,in Indicates the reactive power compensation index before reactive power compensation, It represents the reactive energy output by the power grid system before reactive power compensation. Indicates the reactive energy absorbed by the elevator drive system before reactive power compensation.

[0011] Preferably, in step S6, the reactive power compensation index before compensation is input as a variable into the reactive power compensation capacity analysis model, and the specific content of the reactive power compensation capacity is obtained as follows: Step S61: Calculate the average power index when the elevator is running, and the calculation formula is: ,in Indicates the average power index of the elevator during operation. Indicates the reactive load factor when the elevator is running. Indicates the reactive load value when the elevator is running. Indicates the active load factor when the elevator is running. Indicates the active load value when the elevator is running; Step S62: Reactive power compensation index before reactive power compensation and the average power index during elevator operation As a variable input into the reactive power compensation capacity analysis model, the reactive power compensation capacity is obtained. The calculation formula is: , where Q represents reactive power compensation capacity, Indicates the tangent value of the reactive power compensation index before reactive power compensation, It represents the tangent value of the average power index when the elevator is running. represents the predicted value of the driving power required by the elevator, Indicates the predicted value of driving power provided by the power grid.

[0012] Preferably, in step S7, the elevator energy-saving box receives the reactive power compensation capacity output by the reactive power compensation capacity analysis model, adjusts the reactive power compensation device in the elevator energy-saving box, so that the output of the elevator energy-saving box matches the calculated reactive power compensation capacity, and completes the reactive power compensation for the elevator energy-saving drive.

[0013] Technical effects and advantages of the present invention: The present invention is provided with step S1: real-time monitoring of the elevator operation state according to the elevator energy-saving box, step S2: establishing a first driving power prediction model to predict the driving power required by the elevator, step S3: establishing a second driving power prediction model to predict the driving power provided by the power grid, step S4: judging whether reactive power compensation is required by a compensation judgment model, step S5: receiving a reactive power compensation instruction to calculate a reactive power compensation index, step S6: calculating the reactive power compensation capacity based on the reactive power compensation index, and step S7: completing the reactive power compensation of the elevator energy-saving drive. In short, an elevator energy-saving drive control method with a power grid reactive power management function can accurately predict the driving power required by the elevator and the driving power that the power grid can provide by real-time monitoring of the elevator operation state, thereby realizing precise control of the elevator energy-saving drive; during the operation of the elevator, when it is detected that the driving power provided by the power grid is insufficient to meet the elevator operation requirements, the compensation judgment model will trigger the reactive power compensation mechanism, calculate the reactive power compensation index and then calculate the reactive power compensation capacity, and finally realize the reactive power compensation of the elevator energy-saving drive, which not only optimizes the energy efficiency of the elevator, but also plays a positive role in the stable operation of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The present invention is a flow chart of an elevator energy-saving drive control method with a grid reactive power management function. DETAILED DESCRIPTION

[0015] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are only examples. The energy-saving drive control method for an elevator with a grid reactive power management function involved in the present invention is not limited to the various structures recorded in the following embodiments. All other implementations obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0016] like Figure 1 As shown, the present invention provides an elevator energy-saving drive control method with a grid reactive power management function, comprising the following steps: Step S1: Real-time monitoring of the elevator operation status based on the elevator energy-saving box: connecting the elevator energy-saving box to the elevator control cabinet, monitoring the elevator operation status in real time through the elevator energy-saving box, and collecting elevator operation data; Step S2: Establishing a first driving power prediction model to predict the driving power required by the elevator: Establishing a first driving power prediction model, inputting the elevator operation data into the model, and predicting the driving power required by the elevator based on the elevator operation data; Step S3: Establishing a second driving power prediction model to predict the driving power provided by the power grid: monitoring the operating status of the power grid in real time through the power grid monitoring equipment to collect power grid operation data, and establishing a second driving power prediction model to predict the driving power provided by the power grid; Step S4: judging whether reactive power compensation is required by a compensation judgment model: establishing a compensation judgment model based on the prediction results of the first driving power prediction model and the second driving power prediction model to judge whether reactive power compensation is required for the elevator; Step S5: receiving a reactive power compensation instruction and calculating a reactive power compensation index: receiving a reactive power compensation instruction, establishing a reactive power compensation index calculation mathematical model, and obtaining a reactive power compensation index based on the prediction results of the first driving power prediction model and the second driving power prediction model; Step S6: Calculate reactive power compensation capacity based on reactive power compensation index: input reactive power compensation index as a variable into reactive power compensation capacity analysis model to obtain reactive power compensation capacity; Step S7: completing reactive power compensation for the elevator energy-saving drive: the elevator energy-saving box receives reactive power compensation capacity and completes reactive power compensation for the elevator energy-saving drive.

[0017] In this embodiment, it should be specifically explained that in step S1, the elevator operating state is monitored in real time by the elevator energy-saving box, and the elevator operating data is collected. The elevator energy-saving box automatically detects the phase of the power grid and automatically works synchronously with the power grid. The elevator operating data includes: the tension value when the elevator moves, the maximum value of the standard load-bearing mass of the elevator, the average speed when the elevator moves, and the driving efficiency of the elevator drive system; The elevator energy-saving box has been configured at the factory and no modification is required for on-site installation. If you have special requirements, you can contact customer service to assist in configuring the device through the APP.

[0018] In this embodiment, it should be specifically explained that in step S2, a first driving power prediction model is established, the elevator operation data is output to the model, and the driving power required by the elevator is predicted based on the elevator operation data. The calculation formula of the first driving power prediction model is: ,in represents the predicted value of the driving power required by the elevator, represents the elevator moving resistance coefficient, Indicates the tension value when the elevator is moving. represents the friction coefficient of elevator movement, Indicates the maximum value of the standard load-bearing mass of the elevator. represents the acceleration due to gravity, represents the average speed of the elevator when it moves, Indicates the driving efficiency of the elevator drive system.

[0019] In this embodiment, it should be specifically explained that in step S3, the specific contents of real-time monitoring of the operation status of the power grid by the power grid monitoring device to collect the power grid operation data and establishing the second driving power prediction model to predict the driving power provided by the power grid are as follows: The elevator energy-saving box automatically detects the phase of the power grid and collects the power grid operation data, wherein the power grid operation data includes the standard value of the voltage provided by the power grid, the standard value of the current provided by the power grid and the power factor of the power grid; The calculation formula of the second driving power prediction model is: ,in It represents the predicted value of driving power provided by the power grid. Indicates the standard value of voltage provided by the power grid. Indicates the standard value of current provided by the power grid. Indicates the power factor of the power grid.

[0020] In this embodiment, it should be specifically explained that in step S4, the specific contents of establishing a compensation judgment model based on the prediction results of the first driving power prediction model and the second driving power prediction model to judge whether reactive power compensation is required for the elevator are as follows: Step S41: establishing a compensation judgment model based on the prediction results of the first driving power prediction model and the second driving power prediction model, wherein the compensation judgment model is expressed as: ,in Indicates the difference between the predicted value of the driving power required by the elevator and the predicted value of the driving power provided by the power grid. represents the predicted value of the driving power required by the elevator, Indicates the predicted value of driving power provided by the power grid; Step S42: Determine whether reactive power compensation is required for the elevator based on the difference between the predicted value of the driving power required by the elevator and the predicted value of the driving power provided by the power grid: If the difference between the predicted value of the driving power required by the elevator and the predicted value of the driving power provided by the power grid is , then it is determined that there is no need to compensate for the reactive power of the elevator. If the difference between the predicted value of the driving power required by the elevator and the predicted value of the driving power provided by the power grid is , it is determined that reactive power compensation is required for the elevator.

[0021] In this embodiment, it should be specifically explained that in step S5, the reactive power compensation instruction is received, a reactive power compensation index calculation mathematical model is established, and the reactive power compensation index is obtained based on the prediction results of the first driving power prediction model and the second driving power prediction model. The specific contents are as follows: Step S51: Calculate a reactive power compensation factor based on the power difference based on the prediction results of the first driving power prediction model and the second driving power prediction model, and the calculation formula is: ,in represents the reactive power compensation factor based on the power difference, represents the predicted value of the driving power required by the elevator, Indicates the predicted value of driving power provided by the power grid; Step S52: Reactive power compensation factor The reactive power compensation index before reactive power compensation is obtained by inputting it as a variable into the reactive power compensation index calculation model. The calculation formula is: ,in Indicates the reactive power compensation index before reactive power compensation, represents the reactive power compensation factor based on the power difference, It represents the reactive energy output by the power grid system before reactive power compensation. Indicates the reactive energy absorbed by the elevator drive system before reactive power compensation.

[0022] In this embodiment, it should be specifically explained that in step S6, the reactive power compensation index before compensation is input as a variable into the reactive power compensation capacity analysis model, and the specific content of the reactive power compensation capacity is obtained as follows: Step S61: Calculate the average power index when the elevator is running, and the calculation formula is: ,in Indicates the average power index of the elevator during operation. Indicates the reactive load factor when the elevator is running. Indicates the reactive load value when the elevator is running. Indicates the active load factor when the elevator is running. Indicates the active load value when the elevator is running; Step S62: Reactive power compensation index before reactive power compensation and the average power index during elevator operation As a variable input into the reactive power compensation capacity analysis model, the reactive power compensation capacity is obtained. The calculation formula is: , where Q represents reactive power compensation capacity, represents the predicted value of the driving power required by the elevator, It represents the predicted value of driving power provided by the power grid. Indicates the tangent value of the reactive power compensation index before reactive power compensation, Indicates the tangent value of the average power index when the elevator is running.

[0023] In this embodiment, it should be specifically explained that in step S7, the elevator energy-saving box receives the reactive power compensation capacity output by the reactive power compensation capacity analysis model, adjusts the reactive power compensation device in the elevator energy-saving box, so that the output of the elevator energy-saving box matches the calculated reactive power compensation capacity, and completes the reactive power compensation for the elevator energy-saving drive.

[0024] The difference between this embodiment and the prior art is that this embodiment is provided with step S1: real-time monitoring of the elevator operation status according to the elevator energy-saving box, step S2: establishing a first driving power prediction model to predict the driving power required by the elevator, step S3: establishing a second driving power prediction model to predict the driving power provided by the power grid, step S4: judging whether reactive power compensation is required through a compensation judgment model, step S5: receiving a reactive power compensation instruction to calculate a reactive power compensation index, step S6: calculating the reactive power compensation capacity based on the reactive power compensation index, step S7: completing reactive power compensation for the elevator energy-saving drive, in short, a method with The energy-saving drive control method of the elevator with the reactive power management function of the power grid can accurately predict the driving power required by the elevator and the driving power that the power grid can provide by real-time monitoring of the operating status of the elevator, thereby realizing precise control of the energy-saving drive of the elevator; during the operation of the elevator, when it is detected that the driving power provided by the power grid is insufficient to meet the operation requirements of the elevator, the compensation judgment model will trigger the reactive power compensation mechanism, and calculate the reactive power compensation capacity by calculating the reactive power compensation index, and finally realize the reactive power compensation of the energy-saving drive of the elevator, which not only optimizes the energy utilization efficiency of the elevator, but also plays a positive role in the stable operation of the power grid.

[0025] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0026] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An elevator energy-saving drive control method with power grid reactive power management function, characterized in that: The following steps are involved: Step S1: Real-time monitoring of the elevator operation status based on the elevator energy-saving box: connecting the elevator energy-saving box to the elevator control cabinet, monitoring the elevator operation status in real time through the elevator energy-saving box, and collecting elevator operation data; Step S2: Establishing a first driving power prediction model to predict the driving power required by the elevator: Establishing a first driving power prediction model, inputting the elevator operation data into the model, and predicting the driving power required by the elevator based on the elevator operation data; Step S3: Establishing a second driving power prediction model to predict the driving power provided by the power grid: monitoring the operating status of the power grid in real time through the power grid monitoring equipment to collect power grid operation data, and establishing a second driving power prediction model to predict the driving power provided by the power grid; Step S4: judging whether reactive power compensation is required by a compensation judgment model: establishing a compensation judgment model based on the prediction results of the first driving power prediction model and the second driving power prediction model to judge whether reactive power compensation is required for the elevator; Step S5: receiving a reactive power compensation instruction and calculating a reactive power compensation index: receiving a reactive power compensation instruction, establishing a reactive power compensation index calculation mathematical model, and obtaining a reactive power compensation index based on the prediction results of the first driving power prediction model and the second driving power prediction model; Step S6: Calculate reactive power compensation capacity based on reactive power compensation index: input reactive power compensation index as a variable into reactive power compensation capacity analysis model to obtain reactive power compensation capacity; Step S7: completing reactive power compensation for the elevator energy-saving drive: the elevator energy-saving box receives reactive power compensation capacity and completes reactive power compensation for the elevator energy-saving drive.

2. The elevator energy-saving drive control method with power grid reactive power management function according to claim 1 is characterized in that: In step S1, the elevator operating status is monitored in real time by the elevator energy saving box, and the elevator operating data is collected. The elevator operating data includes: the tension value when the elevator moves, the maximum value of the standard load-bearing mass of the elevator, the average speed when the elevator moves, and the driving efficiency of the elevator drive system.

3. The elevator energy-saving drive control method with power grid reactive power management function according to claim 1 is characterized in that: In the step S2, a first driving power prediction model is established, the elevator operation data is output to the model, and the driving power required by the elevator is predicted based on the elevator operation data. The calculation formula of the first driving power prediction model is: ,in represents the predicted value of the driving power required by the elevator, represents the elevator moving resistance coefficient, Indicates the tension value when the elevator is moving. represents the friction coefficient of elevator movement, Indicates the maximum value of the standard load-bearing mass of the elevator. represents the acceleration due to gravity, represents the average speed of the elevator when it moves, Indicates the driving efficiency of the elevator drive system.

4. The elevator energy-saving drive control method with power grid reactive power management function according to claim 1 is characterized in that: In step S3, the grid operation data is collected by monitoring the grid operation status in real time through the grid monitoring equipment, and a second driving power prediction model is established to predict the driving power provided by the grid. The calculation formula of the second driving power prediction model is: ,in It represents the predicted value of driving power provided by the power grid. Indicates the standard voltage value provided by the power grid. Indicates the standard value of current provided by the power grid. Indicates the power factor of the power grid.

5. The elevator energy-saving drive control method with power grid reactive power management function according to claim 1 is characterized in that: In step S4, the specific contents of establishing a compensation judgment model based on the prediction results of the first driving power prediction model and the second driving power prediction model to judge whether reactive power compensation is required for the elevator are as follows: Step S41: establishing a compensation judgment model based on the prediction results of the first driving power prediction model and the second driving power prediction model, wherein the compensation judgment model is expressed as: ,in Indicates the difference between the predicted value of the driving power required by the elevator and the predicted value of the driving power provided by the power grid. represents the predicted value of the driving power required by the elevator, Indicates the predicted value of driving power provided by the power grid; Step S42: Determine whether reactive power compensation is required for the elevator based on the difference between the predicted value of the driving power required by the elevator and the predicted value of the driving power provided by the power grid: If the difference between the predicted value of the driving power required by the elevator and the predicted value of the driving power provided by the power grid is , then it is determined that there is no need to compensate for the reactive power of the elevator. If the difference between the predicted value of the driving power required by the elevator and the predicted value of the driving power provided by the power grid is , it is determined that reactive power compensation is required for the elevator.

6. The elevator energy-saving drive control method with power grid reactive power management function according to claim 1, characterized in that: In step S5, the reactive power compensation instruction is received, a reactive power compensation index calculation mathematical model is established, and the reactive power compensation index is obtained based on the prediction results of the first driving power prediction model and the second driving power prediction model. The specific contents are as follows: Step S51: Calculate a reactive power compensation factor based on the power difference based on the prediction results of the first driving power prediction model and the second driving power prediction model, and the calculation formula is: ,in represents the reactive power compensation factor based on the power difference, represents the predicted value of the driving power required by the elevator, Indicates the predicted value of driving power provided by the power grid; Step S52: Reactive power compensation factor The reactive power compensation index before reactive power compensation is obtained by inputting it as a variable into the reactive power compensation index calculation model. The calculation formula is: ,in Indicates the reactive power compensation index before reactive power compensation, It represents the reactive energy output by the power grid system before reactive power compensation. Indicates the reactive energy absorbed by the elevator drive system before reactive power compensation.

7. The elevator energy-saving drive control method with power grid reactive power management function according to claim 1 is characterized in that: In step S6, the reactive power compensation index before compensation is input as a variable into the reactive power compensation capacity analysis model, and the specific content of the reactive power compensation capacity is obtained as follows: Step S61: Calculate the average power index when the elevator is running, and the calculation formula is: ,in Indicates the average power index of the elevator during operation. Indicates the reactive load factor when the elevator is running. Indicates the reactive load value when the elevator is running. Indicates the active load factor when the elevator is running. Indicates the active load value when the elevator is running; Step S62: Reactive power compensation index before reactive power compensation and the average power index during elevator operation As a variable input into the reactive power compensation capacity analysis model, the reactive power compensation capacity is obtained. The calculation formula is: , where Q represents the reactive power compensation capacity, Indicates the tangent value of the reactive power compensation index before reactive power compensation, It represents the tangent value of the average power index when the elevator is running. represents the predicted value of the driving power required by the elevator, Indicates the predicted value of driving power provided by the power grid.

8. The elevator energy-saving drive control method with power grid reactive power management function according to claim 1 is characterized in that: In step S7, the elevator energy-saving box receives the reactive power compensation capacity output by the reactive power compensation capacity analysis model, adjusts the reactive power compensation device in the elevator energy-saving box, matches the output of the elevator energy-saving box with the calculated reactive power compensation capacity, and completes the reactive power compensation for the elevator energy-saving drive.

Images