Modeling and simulation method and system of direct-drive permanent magnet wind turbine

Abstract

The present invention relates to the field of wind power generation technology, and discloses a modeling and simulation method and system for a direct-drive permanent magnet wind turbine, comprising a data acquisition module and a modeling and simulation module. The modeling and simulation method and system for the direct-drive permanent magnet wind turbine collect data sets through the data acquisition module, the modeling and simulation module analyzes the detailed process of converting wind energy into mechanical energy and the total amount of mechanical energy into electrical energy, a simulation platform constructs and generates a direct-drive wind turbine model and a permanent magnet synchronous wind turbine generator side rectifier control system simulation model, the modeling and simulation module sets different wind condition modes, and controls the model output control strategy and predicts the total amount of electrical energy. When the energy conversion model has a high degree of simulation and the environmental conditions match the wind condition mode, the modeling and simulation module operates the direct-drive permanent magnet wind turbine according to the simulation control strategy, compares the actual total amount of electrical energy produced with the predicted total amount of electrical energy produced, judges the degree of model simulation, and performs model optimization management to control the production strategy for better efficiency.

Description

TECHNICAL FIELD

[0001] The application relates to the field of wind power generation technology, in particular to a modeling simulation method and system of a direct-drive permanent-magnet wind turbine. BACKGROUND

[0002] The direct-drive permanent-magnet wind turbine is a device for converting wind energy into electric energy. The direct-drive permanent-magnet wind turbine mainly comprises a wind wheel, a generator, a tower drum, a control system and the like. The wind wheel is a key component for capturing wind energy and is usually composed of three blades. The shape and material of the blades have a great influence on the capture efficiency of wind energy. The generator is a core component for converting wind energy into electric energy. The direct-drive permanent-magnet generator is a generator without a gear box, and the rotor thereof is directly connected with the wind wheel. When the wind blows the wind wheel, the wind wheel drives the rotor to rotate, thereby generating current in the stator coil. Since the direct-drive permanent-magnet generator adopts a permanent magnet material, external excitation is not required during operation, and the direct-drive permanent-magnet generator has the advantages of simple structure, high efficiency and low maintenance cost. The tower drum is a structure for supporting the wind wheel and the generator and is usually made of steel. The height of the tower drum is determined according to the wind resource condition. The control system is responsible for monitoring and controlling the operating state of the wind turbine to ensure that the wind turbine operates in a safe and efficient state.

[0003] At present, the modeling simulation method of the traditional direct-drive permanent-magnet wind turbine needs to spend a lot of time to verify the effectiveness of the model multiple times through the simulation platform to construct a prediction model, and then the model is put into production and use. The modeling simulation method has the problems of long time consumption, low modeling efficiency, low modeling simulation degree and high complexity. SUMMARY

[0004] (I) Technical problems solved

[0005] In view of the defects in the prior art, the application provides a modeling simulation method and system of a direct-drive permanent-magnet wind turbine, which has the advantages of high energy conversion model simulation degree and better control production strategy efficiency, and solves the problems of long time consumption, low modeling efficiency, low modeling simulation degree and high complexity of the traditional direct-drive permanent-magnet wind turbine.

[0006] (II) Technical solutions

[0007] To achieve the above-mentioned purpose, the application provides the following technical solutions: a modeling simulation method of a direct-drive permanent-magnet wind turbine, comprising the following steps:

[0008] Step 1: The data acquisition module acquires environmental condition data in real time through network connection with a meteorological environment monitoring sensor. The environmental condition data includes temperature values and wind speed values of the working environment of the direct-drive permanent-magnet wind turbine, and is arranged in time sequence from early to late to form an environmental data set.

[0009] Step 2: The data acquisition module connects to the direct-drive permanent magnet wind turbine generator set via the network to obtain the mechanical parameters of the wind wheel assembly and the mechanical parameters of the direct-drive permanent magnet power generation assembly in real time, and composes a mechanical data set;

[0010] Step 3: The modeling and simulation module calculates and generates the wind energy conversion data set based on the environmental data set and the mechanical data set. and power conversion data sets , the analysis obtained the power generation efficiency of direct-drive permanent magnet wind turbines in converting the total amount of wind energy into mechanical energy and the total amount of mechanical energy into electrical energy;

[0011] Step 4: Modeling and simulation module combines environmental data set, mechanical data set, wind energy conversion data set and power conversion data sets Input Matlab / Simulink simulation platform to build a direct-drive wind turbine model Simulation model of permanent magnet synchronous wind turbine generator side rectifier control system ;

[0012] Step 5: The modeling and simulation module sets different wind conditions according to the environmental data set and controls the direct-drive wind turbine model. Simulation model of permanent magnet synchronous wind turbine generator side rectifier control system According to the optimum tip speed ratio Output corresponding simulation control strategy and forecast the total amount of electricity produced ;

[0013] Step 6: When the environmental condition data in the environmental data set matches the wind condition pattern, the modeling and simulation module follows the simulation control strategy. Run the direct-drive permanent magnet wind turbine and compare the actual total power output with the predicted total power output Compare and judge the direct drive wind turbine model Simulation model of permanent magnet synchronous wind turbine generator side rectifier control system The simulation level is determined and the model optimization management is carried out accordingly.

[0014] Preferably, in step 1, the environmental data set includes environmental condition data acquired in real time by meteorological environment monitoring sensors, and the expression of the environmental data set is: , to Corresponding to the temperature and wind speed values ​​obtained by the meteorological environment monitoring sensor each time, Indicates the time point of obtaining environmental condition data, numbered from 1 to Indicates that the temperature and wind speed values ​​obtained by the meteorological environment monitoring sensor are Group.

[0015] Preferably, in the step two, the mechanical data set includes the wind wheel assembly mechanical parameters and the direct-drive permanent magnet generator assembly mechanical parameters provided by the direct-drive permanent magnet wind turbine in real time, and the expression of the mechanical data set is , represents the time point of providing the mechanical parameters by the direct-drive permanent magnet wind turbine, represents the wind wheel assembly mechanical parameters provided by the direct-drive permanent magnet wind turbine and the time point of providing the parameters, represents the direct-drive permanent magnet generator assembly mechanical parameters provided by the direct-drive permanent magnet wind turbine and the time point of providing the parameters.

[0016] Preferably, in the step three, the modeling simulation module randomly extracts the temperature value and the wind speed value obtained by the group of meteorological environment monitoring sensors in the environmental data set, and marks them as , and then correspondingly extracts the wind wheel assembly mechanical parameters and the direct-drive permanent magnet generator assembly mechanical parameters in the mechanical data set at the same time point. , wherein, and are the same time point, the wind wheel assembly mechanical parameters include the blade rotating speed , the blade length , the wind wheel radius , the number of blades , and the wind wheel assembly blade area , and the direct-drive permanent magnet generator assembly mechanical parameters include the control strategy and the total amount of output electric energy .

[0017] Preferably, in the step three, the wind energy conversion data set is calculated according to the following formula:

[0018]

[0019] In the formula, represents the wind energy utilization coefficient, represents the tip speed ratio, represents the pitch angle, represents the weight of the tip speed ratio in the wind energy utilization coefficient calculation formula, represents the weight of the pitch angle in the wind energy utilization coefficient calculation formula, represents that the weighted average value of the tip speed ratio and the pitch angle is calculated according to the weight and the weight, that is, the wind energy utilization coefficient;

[0020]

[0021] In the formula, It represents the linear velocity at the tip of the wind rotor obtained by multiplying the blade speed by the blade length. Indicates the ratio of the linear velocity at the tip of the wind rotor to the ambient wind speed;

[0022]

[0023] In the formula, Indicates that the wind wheel radius , number of leaves and tip speed ratio Substitute into the inverse tangent function, and the obtained inverse tangent value is the pitch angle;

[0024]

[0025] In the formula, represents the ambient air density, Indicates the ambient air pressure value. Specific gas constant, Indicates the extraction of Set the ambient temperature value and add the Celsius temperature conversion constant 273.15 to the ambient temperature value to get the absolute temperature value;

[0026]

[0027] In the formula, represents the wind energy conversion data set, Represents the constant in the calculation formula of the wind energy conversion data group, that is, the efficiency coefficient of converting wind energy into mechanical energy. Indicates the extraction of Set the ambient wind speed value and calculate the cube of the ambient wind speed value. Indicates the efficiency coefficient of converting wind energy into mechanical energy, wind energy utilization coefficient, ambient air density, blade area of ​​wind rotor assembly and ambient wind speed value, and calculates The total power of a direct-drive permanent magnet wind turbine group converting wind energy into mechanical energy.

[0028] Preferably, in step 3, the electric energy conversion data set The calculation formula is as follows:

[0029]

[0030] In the formula, Represents the electric energy conversion data group, Represents calculation of different control strategies Under this condition, the total amount of electricity produced by the direct-drive permanent magnet power generation component Divide by the total amount of mechanical energy to get the power generation efficiency, Indicates simultaneous calculation Group different control strategies The power generation efficiency of converting the total amount of mechanical energy into electrical energy under certain conditions.

[0031] Preferably, in step 4, the Matlab / Simulink simulation platform is based on the environmental data set, the mechanical data set and the wind energy conversion data set. , build and generate a direct-drive wind turbine model , learn to simulate the process of wind rotor components capturing wind energy and converting it into mechanical energy, and then converting the mechanical energy into electrical energy through direct drive permanent magnet generator components. Matlab / Simulink simulation platform is based on mechanical data sets, wind energy conversion data sets and power conversion data sets , build and generate a simulation model of the permanent magnet synchronous wind turbine generator side rectifier control system , learning and simulating different control strategies The process in which direct-drive permanent magnet power generation components convert mechanical energy into electrical energy according to different power generation efficiencies.

[0032] Preferably, in step 5, the wind condition mode includes a step wind condition mode, a gradual wind condition mode and a random wind condition mode. The step wind condition mode is in a fixed time period. The wind speed value is kept constant during the period, and then in the next period Rapidly increase or decrease to a new wind speed value within a fixed time period. Internal control wind speed value increases or decreases, random wind mode in fixed time period Internal control custom values ​​change irregularly.

[0033] Preferably, in step 6, if the actual total amount of electric energy produced is equal to the predicted total amount of electric energy produced The absolute value of the difference exceeds the total predicted output power 5%, the modeling and simulation module determines the direct-drive wind turbine model Simulation model of permanent magnet synchronous wind turbine generator side rectifier control system The simulation level is low, the modeling and simulation module uses the Matlab / Simulink simulation platform to rebuild the direct-drive wind turbine model Simulation model of permanent magnet synchronous wind turbine generator side rectifier control system , and then according to different wind conditions, according to the optimal tip speed ratio Output corresponding simulation control strategy and forecast the total amount of electricity produced , until the actual total amount of electricity produced is consistent with the predicted total amount of electricity produced The absolute value of the difference does not exceed the total predicted output power 5% of the total.

[0034] A modeling and simulation system for a direct-drive permanent magnet wind turbine generator system includes a meteorological environment monitoring sensor and a direct-drive permanent magnet wind turbine generator system. The meteorological environment monitoring sensor is used to monitor environmental condition data. The direct-drive permanent magnet wind turbine generator system is used to capture wind energy and convert it into mechanical energy, and then convert the mechanical energy into electrical energy. The modeling and simulation system for the direct-drive permanent magnet wind turbine generator system includes a data acquisition module and a modeling and simulation module.

[0035] The data acquisition module is provided with an environmental monitoring unit and a parameter monitoring unit. The environmental monitoring unit is connected to the meteorological environment monitoring sensor via the network to collect the environmental data set in real time. The parameter monitoring unit is connected to the direct-drive permanent magnet wind turbine group via the network to collect the mechanical data set in real time. The data acquisition module transmits the environmental data set and the mechanical data set to the modeling and simulation module via the network.

[0036] The modeling and simulation module includes an energy conversion unit, a simulation unit and a model evaluation unit. The energy conversion unit generates a wind energy conversion data set based on the environmental data set and the mechanical data set. and power conversion data sets and transmits it to the simulation unit through the network, and the simulation unit converts the environmental data set, the mechanical data set, the wind energy conversion data set and power conversion data sets Input Matlab / Simulink simulation platform to build a direct-drive wind turbine model Simulation model of permanent magnet synchronous wind turbine generator side rectifier control system and transmitted to the model evaluation unit via the network. The model evaluation unit sets three wind condition modes according to the environmental data set and controls the direct-drive wind turbine model. Simulation model of permanent magnet synchronous wind turbine generator side rectifier control system According to the optimum tip speed ratio Output three simulation control strategies and forecast the total amount of electricity produced When the environmental condition data in the environmental data set matches the wind condition pattern, the modeling and simulation module follows the simulation control strategy. Run the direct-drive permanent magnet wind turbine and compare the actual total power output with the predicted total power output Compare and judge the direct drive wind turbine model Simulation model of permanent magnet synchronous wind turbine generator side rectifier control system The simulation level is determined and the model optimization management is carried out accordingly.

[0037] Compared with the prior art, the present invention provides a modeling and simulation method and system for a direct-drive permanent magnet wind turbine generator set, which has the following beneficial effects:

[0038] 1. The present invention uses meteorological environment monitoring sensors to obtain environmental condition data in real time. The environmental condition data includes the temperature and wind speed values ​​of the working environment of the direct-drive permanent magnet wind turbine. The data acquisition module arranges the data in chronological order from early to late to form an environmental data set. The direct-drive permanent magnet wind turbine provides the mechanical parameters of the wind wheel assembly and the mechanical parameters of the direct-drive permanent magnet power generation assembly in real time. The data acquisition module forms a mechanical data set. The modeling and simulation module calculates and generates a wind energy conversion data set based on the environmental data set and the mechanical data set. and power conversion data sets , the analysis obtains the total amount of wind energy converted into mechanical energy and the power generation efficiency of the direct-drive permanent magnet wind turbine. The modeling and simulation module converts the environmental data set, mechanical data set, wind energy conversion data set and power conversion data sets Input Matlab / Simulink simulation platform to build a direct-drive wind turbine model Simulation model of permanent magnet synchronous wind turbine generator side rectifier control system The modeling and simulation module sets different wind conditions according to the environmental data set and controls the direct-drive wind turbine model. Simulation model of permanent magnet synchronous wind turbine generator side rectifier control system According to the optimum tip speed ratio Output corresponding simulation control strategy and forecast the total amount of electricity produced , pre-output optimal simulation control strategy and forecast the total amount of electricity produced , which facilitates the subsequent rapid adaptation to actual production environment conditions. The energy conversion model has a high degree of simulation and does not require multiple rounds of repeated verification, which is time-saving and efficient.

[0039] 2. When the modeling and simulation system of the direct-drive permanent magnet wind turbine determines that the environmental condition data in the environmental data set matches the wind condition pattern, the modeling and simulation module follows the simulation control strategy. Run the direct-drive permanent magnet wind turbine and compare the actual total power output with the predicted total power output Compare the actual output of electricity with the predicted output of electricity. The absolute value of the difference exceeds the total predicted output power 5%, the modeling and simulation module determines the direct-drive wind turbine model Simulation model of permanent magnet synchronous wind turbine generator side rectifier control system The simulation level is low, the modeling and simulation module uses the Matlab / Simulink simulation platform to rebuild the direct-drive wind turbine model Permanent magnet synchronous wind generator machine side rectifier control system simulation model , and according to different wind condition modes, the optimal tip speed ratio The corresponding simulation control strategy is output And predict the total amount of output power , until the absolute value of the difference between the actual output power and the predicted output power The absolute value of the difference between the actual output power and the predicted output power 5%, ensure that the actual output power is 95% or 105% of the model predicted output power The control production strategy is more effective. BRIEF DESCRIPTION OF DRAWINGS

[0040] Fig. 1 The method steps of the present application.

[0041] Fig. 2 The system schematic diagram of the present application. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0043] Because the modeling and simulation method of traditional direct-drive permanent magnet wind turbine needs to spend a lot of time to verify the effectiveness of the model multiple times through the simulation platform to build a prediction model, and then put into production, it takes a long time to build the model, the modeling efficiency is low, and it cannot be updated and iterated in time according to the actual wind conditions, the modeling and simulation degree is low and the complexity is high, therefore, a direct-drive permanent magnet wind turbine modeling and simulation method and system are provided, please refer to Figs. 1-2 The direct-drive permanent magnet wind turbine modeling and simulation method comprises the following steps:

[0044] Step 1, the data acquisition module acquires environmental condition data in real time through network connection of meteorological environment monitoring sensors, the environmental condition data includes temperature value and wind speed value of the working environment of the direct-drive permanent magnet wind turbine, and is arranged in time sequence from early to late to form an environment data set, the environment data set includes the environmental condition data acquired by the meteorological environment monitoring sensor in real time, and the expression of the environment data set is , corresponding to the temperature value and wind speed value acquired by the meteorological environment monitoring sensor each time, the temperature value can directly affect the air density, thereby affecting the wind energy utilization coefficient of the wind wheel assembly in the direct-drive permanent magnet wind turbine, ​indicates the time point of acquiring environmental condition data, details the time point of environmental condition data change, facilitates subsequent rapid judgment of wind condition mode, and is numbered 1 to indicates that the temperature value and wind speed value acquired by the meteorological environment monitoring sensor have a group;

[0045] Step two, the data acquisition module acquires the wind wheel assembly mechanical parameter and the direct-drive permanent magnet power generation assembly mechanical parameter of the direct-drive permanent magnet wind turbine set in real time through network connection, and forms a mechanical data set, the mechanical data set includes the wind wheel assembly mechanical parameter and the direct-drive permanent magnet power generation assembly mechanical parameter provided by the direct-drive permanent magnet wind turbine set in real time, and the expression of the mechanical data set is , indicates the time point of providing the mechanical parameter by the direct-drive permanent magnet wind turbine set, indicates the wind wheel assembly mechanical parameter provided by the direct-drive permanent magnet wind turbine set and the time point of providing the parameter, indicates the direct-drive permanent magnet power generation assembly mechanical parameter provided by the direct-drive permanent magnet wind turbine set and the time point of providing the parameter;

[0046] Step three, the modeling simulation module calculates and generates a wind energy conversion data group and an electric energy conversion data group according to the environmental data set and the mechanical data set, and analyzes to obtain the total amount of converting wind energy into mechanical energy by the direct-drive permanent magnet wind turbine set and the power generation efficiency of converting the total amount of mechanical energy into electric energy;

[0047] The modeling simulation module randomly extracts the temperature value and wind speed value acquired by the meteorological environment monitoring sensor in the first group of environmental data sets, and marks it as , and then correspondingly extracts the wind wheel assembly mechanical parameter and the direct-drive permanent magnet power generation assembly mechanical parameter in the mechanical data set at the same time point, wherein and are the same time point, the wind wheel assembly mechanical parameter includes blade rotating speed , blade length , wind wheel radius , number of blades , and wind wheel assembly blade area , the wind wheel assembly mechanical parameter is constant data, and the direct-drive permanent magnet power generation assembly mechanical parameter includes control strategy and total output electric energy , the direct-drive permanent magnet power generation assembly mechanical parameter is variable data, the control strategy can be directly acquired through the direct-drive permanent magnet wind turbine set control system, and the total output electric energy The precise acquisition can be realized by the electric energy meter;

[0048] Wind energy conversion data set The calculation formula is as follows:

[0049]

[0050] In the formula, represents the wind energy utilization coefficient, represents the tip speed ratio, represents the pitch angle, represents the weight of the wind energy utilization coefficient calculation formula for the tip speed ratio, represents the weight of the wind energy utilization coefficient calculation formula for the pitch angle, The weights and The weights are set according to the actual production situation, and depend on the specific blade design and fluid dynamics conditions. Different direct-drive permanent magnet wind turbine designs have different structures, and the proportions of the tip speed ratio and the pitch angle in the corresponding wind energy utilization coefficient are also different, represents the wind energy utilization coefficient according to The weights and The weighted average value of the tip speed ratio and the pitch angle calculated by the weights is the wind energy utilization coefficient.

[0051]

[0052] In the formula, represents the linear velocity at the tip of the wind wheel obtained by multiplying the blade length by the blade speed, represents the ratio of the linear velocity at the tip of the wind wheel to the ambient wind speed value;

[0053]

[0054] In the formula, represents the arctangent value obtained by substituting the wind wheel radius , the number of blades and the tip speed ratio into the arctangent function;

[0055]

[0056] In the formula, represents the ambient air density, represents the ambient air pressure value, a specific gas constant, represents the absolute temperature value obtained by adding the constant 273.15 for converting Celsius temperature to Kelvin temperature to the extracted ambient temperature value;

[0057]

[0058] In the formula, represents the wind energy conversion data set, Represents the constant in the calculation formula of the wind energy conversion data group, that is, the efficiency coefficient of converting wind energy into mechanical energy. Indicates the extraction of Set the ambient wind speed value and calculate the cube of the ambient wind speed value. Indicates the efficiency coefficient of converting wind energy into mechanical energy, wind energy utilization coefficient, ambient air density, blade area of ​​wind rotor assembly and ambient wind speed value, and calculates The total power of the direct-drive permanent magnet wind turbine group to convert wind energy into mechanical energy is conducive to the subsequent rapid construction of a more simulated energy conversion model;

[0059] Power conversion data set The calculation formula is as follows:

[0060]

[0061] In the formula, Represents the electric energy conversion data group, Represents calculation of different control strategies Under this condition, the total amount of electricity produced by the direct-drive permanent magnet power generation component Divide by the total amount of mechanical energy to get the power generation efficiency, Indicates simultaneous calculation Group different control strategies Under this condition, the total amount of mechanical energy is converted into electrical energy, and the control strategy is analyzed in detail. The interactive relationship between the energy conversion model and power generation efficiency is conducive to the subsequent rapid construction of a more simulated energy conversion model;

[0062] Step 4: Modeling and simulation module combines environmental data set, mechanical data set, wind energy conversion data set and power conversion data sets Input Matlab / Simulink simulation platform, Matlab / Simulink simulation platform according to environmental data set, mechanical data set and wind energy conversion data set , build and generate a direct-drive wind turbine model , learn to simulate the process of wind rotor components capturing wind energy and converting it into mechanical energy, and then converting the mechanical energy into electrical energy through direct drive permanent magnet generator components. Matlab / Simulink simulation platform is based on mechanical data sets, wind energy conversion data sets and power conversion data sets , build and generate a simulation model of the permanent magnet synchronous wind turbine generator side rectifier control system , learning and simulating different control strategies Next, the direct-drive permanent magnet power generation assembly converts mechanical energy into electrical energy according to different power generation efficiencies;

[0063] Step five, the modeling simulation module sets different wind condition modes according to the environmental data set, the wind condition modes include step wind condition mode, gradual wind condition mode and random wind condition mode, the step wind condition mode controls the wind speed value to be constant in a fixed time period , then the wind speed value is rapidly increased or decreased to a new wind speed value in the next time period , the gradual wind condition mode controls the wind speed value to be increased or decreased in a fixed time period , the random wind condition mode controls the wind speed value to change irregularly in a fixed time period , controls the direct-drive wind turbine model and the machine-side rectifier control system simulation model of the permanent magnet synchronous wind power generator according to the optimal tip speed ratio , outputs the corresponding simulation control strategy and the predicted total output power , one step, three wind condition modes, corresponding to three simulation control strategies and the predicted total output power , the optimal simulation control strategy is output in advance and the predicted total output power , which is convenient for subsequent rapid adaptation to actual production environment conditions, the energy conversion model simulation degree is high, and multiple rounds of repeated verification are not required, which saves time and is efficient;

[0064] Step six, when the environmental condition data in the environmental data set matches the wind condition mode, the modeling simulation module runs the direct-drive permanent magnet wind turbine according to the simulation control strategy , compares the actual total output power with the predicted total output power , if the absolute value of the difference between the actual total output power and the predicted total output power exceeds 5% of the predicted total output power , the modeling simulation module determines that the simulation degree of the direct-drive wind turbine model and the machine-side rectifier control system simulation model of the permanent magnet synchronous wind power generator is low, the modeling simulation module reconstructs the direct-drive wind turbine model and the machine-side rectifier control system simulation model of the permanent magnet synchronous wind power generator , and according to different wind condition modes, outputs the corresponding simulation control strategy according to the optimal tip speed ratio , and the predicted total output power , until the actual total output power and the predicted total output power The absolute value of the difference does not exceed the total predicted output power 5% of the total power output, ensuring that the actual total power output is the total power output predicted by the model 95% or 105% of the total cost, and the efficiency of controlling production strategies is better.

[0065] The above-mentioned modeling and simulation method of the direct-drive permanent magnet wind turbine generator set is implemented based on the modeling and simulation system of the direct-drive permanent magnet wind turbine generator set, which includes a meteorological environment monitoring sensor and a direct-drive permanent magnet wind turbine generator set. The meteorological environment monitoring sensor is used to monitor environmental condition data. The direct-drive permanent magnet wind turbine generator set is used to capture wind energy and convert it into mechanical energy, and then convert the mechanical energy into electrical energy. The modeling and simulation system of the direct-drive permanent magnet wind turbine generator set includes a data acquisition module and a modeling and simulation module.

[0066] The data acquisition module is equipped with an environmental monitoring unit and a parameter monitoring unit. The environmental monitoring unit is connected to the meteorological environment monitoring sensor through the network to collect the environmental data set in real time. The parameter monitoring unit is connected to the direct-drive permanent magnet wind turbine group through the network to collect the mechanical data set in real time. The data acquisition module transmits the environmental data set and the mechanical data set to the modeling and simulation module through the network.

[0067] The modeling and simulation module includes energy conversion unit, simulation unit and model evaluation unit. The energy conversion unit calculates and generates wind energy conversion data set based on environmental data set and mechanical data set. and power conversion data sets and transmit it to the simulation unit through the network. The simulation unit converts the environmental data set, mechanical data set, wind energy conversion data set into and power conversion data sets Input Matlab / Simulink simulation platform to build a direct-drive wind turbine model Simulation model of permanent magnet synchronous wind turbine generator side rectifier control system and transmitted to the model evaluation unit through the network. The model evaluation unit sets three wind condition modes according to the environmental data set and controls the direct-drive wind turbine model. Simulation model of permanent magnet synchronous wind turbine generator side rectifier control system According to the optimum tip speed ratio Output three simulation control strategies and forecast the total amount of electricity produced , pre-output optimal simulation control strategy and forecast the total amount of electricity produced , which is convenient for subsequent rapid adaptation to actual production environment conditions. The energy conversion model has a high degree of simulation and does not require multiple rounds of repeated verification, which is time-consuming and efficient. When the environmental condition data in the environmental data set matches the wind condition pattern, the modeling and simulation module follows the simulation control strategy Running direct-drive permanent magnet wind turbine, the actual output of the total amount of electricity and the predicted output of the total amount of electricity Conducting comparison, judging the simulation degree of direct-drive wind turbine model And permanent magnet synchronous wind power generator machine side rectifier control system simulation model , and the corresponding model optimization management, control production strategy performance better.

[0068] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application being defined by the appended claims and their equivalents.

Claims

1. A modeling and simulation method for a direct-drive permanent magnet wind turbine generator system, characterized by: The following steps are involved: Step 1: The data acquisition module connects to the meteorological environment monitoring sensor through the network to obtain real-time environmental condition data. The environmental condition data includes the temperature and wind speed values ​​of the working environment of the direct-drive permanent magnet wind turbine generator set, and is arranged in chronological order from early to late to form an environmental data set; Step 2: The data acquisition module connects to the direct-drive permanent magnet wind turbine generator set via the network to obtain the mechanical parameters of the wind wheel assembly and the mechanical parameters of the direct-drive permanent magnet power generation assembly in real time, and composes a mechanical data set; Step 3: The modeling and simulation module calculates and generates the wind energy conversion data set based on the environmental data set and the mechanical data set. and power conversion data sets , the analysis obtained the power generation efficiency of direct-drive permanent magnet wind turbines in converting the total amount of wind energy into mechanical energy and the total amount of mechanical energy into electrical energy; Step 4: Modeling and simulation module combines environmental data set, mechanical data set, wind energy conversion data set and power conversion data sets Input Matlab / Simulink simulation platform to build a direct-drive wind turbine model Simulation model of permanent magnet synchronous wind turbine generator side rectifier control system ; Step 5: The modeling and simulation module sets different wind conditions according to the environmental data set and controls the direct-drive wind turbine model. Simulation model of permanent magnet synchronous wind turbine generator side rectifier control system According to the optimum tip speed ratio Output the corresponding simulation control strategy and forecast the total amount of electricity produced ; Step 6: When the environmental condition data in the environmental data set matches the wind condition pattern, the modeling and simulation module follows the simulation control strategy. Run the direct-drive permanent magnet wind turbine and compare the actual total power output with the predicted total power output Compare and judge the direct drive wind turbine model Simulation model of permanent magnet synchronous wind turbine generator side rectifier control system The simulation level is determined and the model optimization management is carried out accordingly.

2. The modeling and simulation method of a direct-drive permanent magnet wind turbine generator system according to claim 1, characterized in that: In step 1, the environmental data set includes environmental condition data acquired in real time by meteorological environment monitoring sensors. The expression of the environmental data set is: , to Corresponding to the temperature and wind speed values ​​obtained by the meteorological environment monitoring sensor each time, Indicates the time point of obtaining environmental condition data, numbered from 1 to Indicates that the temperature and wind speed values ​​obtained by the meteorological environment monitoring sensor are Group.

3. The modeling and simulation method of a direct-drive permanent magnet wind turbine generator system according to claim 2, characterized in that: In step 2, the mechanical data set includes the mechanical parameters of the wind wheel assembly and the mechanical parameters of the direct-drive permanent magnet power generation assembly provided in real time by the direct-drive permanent magnet wind turbine. The expression of the mechanical data set is: , Indicates the time point when the direct-drive permanent magnet wind turbine provides mechanical parameters, Indicates the mechanical parameters of the wind wheel assembly provided by the direct-drive permanent magnet wind turbine and the time point when the parameters are provided. It indicates the mechanical parameters of the direct-drive permanent magnet power generation component provided by the direct-drive permanent magnet wind turbine and the time point when the parameters are provided.

4. The modeling and simulation method of a direct-drive permanent magnet wind turbine generator system according to claim 3, characterized in that: In step 3, the modeling and simulation module randomly extracts the first The temperature and wind speed values ​​obtained by the meteorological environment monitoring sensors are marked as , and then extract the mechanical parameters of the wind wheel components in the mechanical data set at the same time point Mechanical parameters of direct drive permanent magnet generator components ,in, and At the same time point, the mechanical parameters of the wind wheel assembly Including blade speed , blade length , rotor radius , number of leaves and rotor blade area , mechanical parameters of direct drive permanent magnet generator components Including control strategies and the total amount of electricity produced .

5. The modeling and simulation method of a direct-drive permanent magnet wind turbine generator system according to claim 4, characterized in that: In step 3, the wind energy conversion data set The calculation formula is as follows: In the formula, represents the wind energy utilization coefficient, represents the tip speed ratio, represents the pitch angle, Indicates the weight of the wind energy utilization coefficient calculation formula for the tip speed ratio, Indicates the weight of the wind energy utilization coefficient calculation formula for the pitch angle, Indicates that Weight and Weight, calculate the weighted average of the tip speed ratio and pitch angle, which is the wind energy utilization coefficient; In the formula, It represents the linear velocity at the tip of the wind rotor obtained by multiplying the blade speed by the blade length. Indicates the ratio of the linear velocity at the tip of the wind rotor to the ambient wind speed; In the formula, Indicates that the wind wheel radius , number of leaves and tip speed ratio Substitute into the inverse tangent function, and the obtained inverse tangent value is the pitch angle; In the formula, represents the ambient air density, Indicates the ambient air pressure value. represents the specific gas constant, Indicates the extraction of Set the ambient temperature value and add the Celsius temperature conversion constant 273.15 to the ambient temperature value to get the absolute temperature value; In the formula, represents the wind energy conversion data set, Represents the constant in the calculation formula of the wind energy conversion data group, that is, the efficiency coefficient of converting wind energy into mechanical energy. Indicates the extraction of Set the ambient wind speed value and calculate the cube of the ambient wind speed value. Indicates the efficiency coefficient of converting wind energy into mechanical energy, wind energy utilization coefficient, ambient air density, blade area of ​​wind rotor assembly and ambient wind speed value, and calculates The total power of a direct-drive permanent magnet wind turbine group converting wind energy into mechanical energy.

6. The modeling and simulation method of a direct-drive permanent magnet wind turbine generator system according to claim 5, characterized in that: In the step 3, the power conversion data set The calculation formula is as follows: In the formula, Represents the electric energy conversion data group, Represents calculation of different control strategies Under this condition, the total amount of electricity produced by the direct-drive permanent magnet power generation component Divide by the total amount of mechanical energy to get the power generation efficiency, Indicates simultaneous calculation Group different control strategies The power generation efficiency of converting the total amount of mechanical energy into electrical energy under certain conditions.

7. The modeling and simulation method of a direct-drive permanent magnet wind turbine generator system according to claim 6, characterized in that: In the fourth step, the Matlab / Simulink simulation platform is based on the environmental data set, the mechanical data set and the wind energy conversion data set. , build and generate a direct-drive wind turbine model , learn to simulate the process of wind rotor components capturing wind energy and converting it into mechanical energy, and then converting the mechanical energy into electrical energy through direct drive permanent magnet generator components. Matlab / Simulink simulation platform is based on mechanical data sets, wind energy conversion data sets and power conversion data sets , build and generate a simulation model of the permanent magnet synchronous wind turbine generator side rectifier control system , learning and simulating different control strategies The process in which direct-drive permanent magnet power generation components convert mechanical energy into electrical energy according to different power generation efficiencies.

8. The modeling and simulation method of a direct-drive permanent magnet wind turbine generator system according to claim 7, characterized in that: In step 5, the wind condition mode includes a step wind condition mode, a gradual wind condition mode and a random wind condition mode. The step wind condition mode is in a fixed time period. The wind speed value is kept constant during the period, and then in the next period Rapidly increase or decrease to a new wind speed value within a fixed time period. Internal control wind speed value increases or decreases, random wind mode in fixed time period Internal control custom values ​​change irregularly.

9. The modeling and simulation method of a direct-drive permanent magnet wind turbine generator system according to claim 8, characterized in that: In step 6, if the actual total amount of electric energy produced is equal to the predicted total amount of electric energy produced The absolute value of the difference exceeds the total predicted output power 5%, the modeling and simulation module determines the direct-drive wind turbine model Simulation model of permanent magnet synchronous wind turbine generator side rectifier control system The simulation level is low, the modeling and simulation module uses the Matlab / Simulink simulation platform to rebuild the direct-drive wind turbine model Simulation model of permanent magnet synchronous wind turbine generator side rectifier control system , and then according to different wind conditions, according to the optimal tip speed ratio Output the corresponding simulation control strategy and forecast the total amount of electricity produced , until the actual total amount of electricity produced is consistent with the predicted total amount of electricity produced The absolute value of the difference does not exceed the total predicted output power 5% of the total.

10. A modeling and simulation system for a direct-drive permanent magnet wind turbine generator set, applied to the modeling and simulation method for a direct-drive permanent magnet wind turbine generator set according to any one of claims 1 to 9, comprising a meteorological environment monitoring sensor and a direct-drive permanent magnet wind turbine generator set, wherein the meteorological environment monitoring sensor is used to monitor environmental condition data, and the direct-drive permanent magnet wind turbine generator set is used to capture wind energy and convert it into mechanical energy, and then convert the mechanical energy into electrical energy, and wherein: The modeling and simulation system of the direct-drive permanent magnet wind turbine generator system includes a data acquisition module and a modeling and simulation module; The data acquisition module is provided with an environmental monitoring unit and a parameter monitoring unit. The environmental monitoring unit is connected to the meteorological environment monitoring sensor via the network to collect the environmental data set in real time. The parameter monitoring unit is connected to the direct-drive permanent magnet wind turbine group via the network to collect the mechanical data set in real time. The data acquisition module transmits the environmental data set and the mechanical data set to the modeling and simulation module via the network. The modeling and simulation module includes an energy conversion unit, a simulation unit and a model evaluation unit. The energy conversion unit generates a wind energy conversion data set based on the environmental data set and the mechanical data set. and power conversion data sets and transmits it to the simulation unit through the network, and the simulation unit converts the environmental data set, the mechanical data set, the wind energy conversion data set and power conversion data sets Input Matlab / Simulink simulation platform to build a direct-drive wind turbine model Simulation model of permanent magnet synchronous wind turbine generator side rectifier control system and transmitted to the model evaluation unit via the network. The model evaluation unit sets three wind condition modes according to the environmental data set and controls the direct-drive wind turbine model. Simulation model of permanent magnet synchronous wind turbine generator side rectifier control system According to the optimum tip speed ratio Output three simulation control strategies and forecast the total amount of electricity produced When the environmental condition data in the environmental data set matches the wind condition pattern, the modeling and simulation module follows the simulation control strategy. Run the direct-drive permanent magnet wind turbine and compare the actual total power output with the predicted total power output Compare and judge the direct drive wind turbine model Simulation model of permanent magnet synchronous wind turbine generator side rectifier control system The simulation level is determined and the model optimization management is carried out accordingly.

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