Wind turbine generator electrical parameter design and real-time simulation method based on RTDS and related device

Abstract

The invention provides an RTDS-based wind turbine generator electrical parameter design and real-time simulation method and a related device. The method comprises the following steps: establishing a parameter design algorithm in a real-time digital simulation system; the parameter design algorithm is used for calculating corresponding design parameters according to given fan design requirement parameters; establishing an RTDS real-time simulation model of the permanent magnet synchronous wind driven generator in a real-time digital simulation system; fan design requirement parameters are input into the RTDS real-time simulation model, design parameters are calculated through a parameter design algorithm, the RTDS real-time simulation model is imported into the RTDS real-time simulation platform for online simulation, and correctness of the design parameters is continuously corrected and verified. According to the method, only the design requirements of the system need to be provided, the RTDS real-time simulation model integrating design and verification is utilized, design parameters are automatically calculated, and design of the wind power generation system is completed. And meanwhile, parameters in the real-time simulation model are automatically modified, real-time simulation is carried out, and the correctness of the design is verified.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy simulation modeling, and in particular relates to a wind turbine electrical parameter design and real-time simulation method based on RTDS and related devices. Background Art

[0002] Renewable energy sources, particularly wind power, are increasingly accounting for a growing share of power generation in the power system. Unlike traditional synchronous generators, permanent magnet direct-drive synchronous wind turbines are connected to the grid via back-to-back converters and are significantly affected by external factors such as wind speed, making their operation more complex. Furthermore, to ensure the quality of wind power generation, wind farms often transmit power to the grid via flexible DC systems. The interaction between these two systems also makes the entire system more dynamic. With the widespread integration of wind power, the dynamics of the power grid will become even more complex. To ensure the safety and stability of future systems with a high proportion of renewable energy and the efficiency of wind power system design, a rapid wind power system design method coupled with accurate real-time simulation is required to verify the correctness of the design. Currently, wind power system design typically begins with manual calculation of the wind turbine electrical parameters. Based on this, a simulation model is then built in offline simulation platforms such as Matlab and PSCAD, and offline simulation is performed to verify the correctness of the wind power system design.

[0003] When designing a wind turbine system, key design parameters include the AC filter inductor, AC filter capacitor, damping resistor, back-to-back converter DC voltage, and DC capacitor. These parameters are primarily determined by design requirements such as system power rating, grid voltage, current ripple, and voltage loss. When designing multiple wind turbine systems, all design parameters vary due to varying design requirements, making manual calculations prohibitively labor-intensive. Furthermore, when verifying the accuracy of design parameters, currently used offline simulation platforms cannot accurately analyze the dynamic processes of the wind turbine system, differing from actual operating conditions and hindering effective verification of design accuracy. Summary of the Invention

[0004] In view of this, the present invention provides a wind turbine electrical parameter design and real-time simulation method and related devices based on RTDS, which are used to solve the problems of huge manual calculation workload and inability of offline simulation platforms to meet accuracy requirements in the design of existing wind power generation systems.

[0005] In order to achieve the above object, the technical solution provided by the present invention is as follows:

[0006] In a first aspect, the present invention provides a method for designing and simulating electrical parameters of a wind turbine generator system based on RTDS, comprising the following steps:

[0007] Establishing a parameter design algorithm in a real-time digital simulation system; the parameter design algorithm is used to calculate corresponding design parameters based on given fan design requirement parameters;

[0008] Establish the RTDS real-time simulation model of permanent magnet synchronous wind turbine in the real-time digital simulation system;

[0009] Input the required design parameters of the fan into the RTDS real-time simulation model, calculate the design parameters through the parameter design algorithm, and import the RTDS real-time simulation model into the RTDS real-time simulation platform for online simulation, and continuously correct and verify the correctness of the design parameters.

[0010] Furthermore, the parameter design algorithm includes a method for calculating the AC inductance value. The calculation expression of the AC inductance value is as follows:

[0011]

[0012]

[0013]

[0014] Where, is the AC inductance value; is the minimum AC inductance value, Output of the converter The per-unit value of the subharmonic line voltage peak value, is the DC voltage value, is the harmonic order, is the grid frequency, is the AC current ripple percentage, is the rated AC current value; is the maximum AC inductance value, is the AC inductor voltage loss percentage, is the effective value of the AC grid line voltage, is the angular frequency.

[0015] Furthermore, the parameter design algorithm includes a method for calculating the AC capacitance value. The calculation expression of the AC capacitance value is as follows:

[0016]

[0017]

[0018]

[0019]

[0020] Where, and The AC capacitance values calculated based on the first maximum AC capacitance value and the second maximum AC capacitance value are respectively, and the final AC capacitance value is and The values that satisfy the above inequalities at the same time; is the first maximum AC capacitance value, It is the percentage of reactive power absorbed by AC capacitor to rated active power. is the rated active power of the AC system, is the angular frequency, is the effective value of the AC grid line voltage; is the minimum AC capacitance value, is the carrier frequency, is the AC inductance value; is the second largest AC capacitance value, is the grid frequency.

[0021] Furthermore, the parameter design algorithm includes a damping resistance value calculation method, and the calculation expression of the damping resistance value is as follows:

[0022]

[0023] Where, is the damping resistance value, is the quality factor, is the AC inductance value, is the AC capacitance value; the damping resistance value The value of satisfies the quality factor In the range of 3 to 5.

[0024] Furthermore, the parameter design algorithm includes a DC voltage value design method, and the calculation expression of the DC voltage value is as follows:

[0025]

[0026] Where, is the DC voltage value, is the effective value of the AC phase voltage, is the maximum modulation ratio.

[0027] Furthermore, the parameter design algorithm includes a DC bus capacitance value design method. The calculation expression of the DC bus capacitance value is as follows:

[0028]

[0029] Where, is the DC bus capacitance value, is the rated active power of the AC system, To maintain time, is the DC voltage value, For system efficiency.

[0030] Furthermore, the RTDS real-time simulation model of the permanent magnet synchronous wind turbine includes:

[0031] Permanent magnet direct-drive generator module, grid-side control module and generator-side converter control module;

[0032] The permanent magnet direct-drive generator module is used to convert mechanical energy into electrical energy, and uses internal submodules to simulate the grid environment, adapt to the grid voltage, and complete the conversion of electrical energy forms;

[0033] The grid-side control module is used to control the wind turbine power and voltage;

[0034] The machine-side converter control module is used to achieve maximum power tracking of the wind turbine and control the stator voltage of the generator.

[0035] In a second aspect, the present invention provides a wind turbine electrical parameter design and real-time simulation device based on RTDS, comprising:

[0036] An algorithm setting module is used to establish a parameter design algorithm in a real-time digital simulation system; the parameter design algorithm is used to calculate corresponding design parameters based on given fan design requirement parameters;

[0037] A model building module is used to build an RTDS real-time simulation model of a permanent magnet synchronous wind turbine in a real-time digital simulation system;

[0038] The simulation verification module is used to input the required design parameters of the fan into the RTDS real-time simulation model, calculate the design parameters through the parameter design algorithm, and import the RTDS real-time simulation model into the RTDS real-time simulation platform for online simulation, and continuously correct and verify the correctness of the design parameters.

[0039] In a third aspect, the present invention provides a computer device, comprising a processor and a memory:

[0040] The memory is used to store computer programs and send instructions of the computer programs to the processor;

[0041] The processor executes the wind turbine electrical parameter design and real-time simulation method based on RTDS according to the instructions of the computer program as described in the first aspect.

[0042] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, a method for designing and simulating electrical parameters of a wind turbine generator system based on RTDS as described in the first aspect is implemented.

[0043] In summary, the present invention provides a method and related device for designing electrical parameters of a wind turbine generator set based on RTDS, and for real-time simulation, by establishing a parameter design algorithm in a real-time digital simulation system; the parameter design algorithm is used to calculate corresponding design parameters based on given wind turbine design requirement parameters; an RTDS real-time simulation model of a permanent magnet synchronous wind turbine generator is established in the real-time digital simulation system; the wind turbine design requirement parameters are input into the RTDS real-time simulation model, the design parameters are calculated by the parameter design algorithm, and the RTDS real-time simulation model is imported into the RTDS real-time simulation platform for online simulation, and the correctness of the design parameters is continuously corrected and verified. The present invention only needs to provide the design requirements of the system, and utilizes the RTDS real-time simulation model that integrates design and verification to automatically calculate the design parameters and complete the design of the wind power generation system. At the same time, the parameters in the RTDS real-time simulation model are automatically modified, and real-time simulation is performed to verify the correctness of the design. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0045] Figure 1 A flow chart of a wind turbine electrical parameter design and real-time simulation method based on RTDS provided in an embodiment of the present invention;

[0046] Figure 2 RTDS model diagram of a permanent magnet direct-drive wind turbine provided by an embodiment of the present invention;

[0047] Figure 3 A diagram of the inner loop control model of the grid-side converter provided in an embodiment of the present invention;

[0048] Figure 4 A diagram of the outer loop control model of the grid-side converter provided in an embodiment of the present invention;

[0049] Figure 5 A diagram of the inner loop control model of the generator-side converter provided in an embodiment of the present invention;

[0050] Figure 6 A diagram of the outer loop control model of the generator-side converter provided in an embodiment of the present invention;

[0051] Figure 7 RTDS platform RUNTIME module diagram provided by an embodiment of the present invention;

[0052] Figure 8A block diagram of a wind turbine electrical parameter design and real-time simulation device based on RTDS provided in an embodiment of the present invention;

[0053] Figure 9 A block diagram of a computer device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0054] In order to make the purposes, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0055] See also Figure 1 This embodiment provides a method for wind turbine electrical parameter design and real-time simulation based on RTDS. RTDS, which stands for Real Time Digital Simulation System (RTDS), is an advanced digital simulation technology specifically designed for power system simulation. Compared to traditional simulation, RTDS utilizes parallel computer systems to complete real-time simulation of complex power systems in a remarkably short time. Furthermore, RTDS's powerful dedicated hardware ensures real-time operation and closed-loop testing capabilities.

[0056] The method comprises the following steps:

[0057] S1: Establishing a parameter design algorithm in a real-time digital simulation system; the parameter design algorithm is used to calculate corresponding design parameters based on given fan design requirement parameters.

[0058] It should be noted that, based on relevant power system theory and the requirements of wind turbine electrical design, the mathematical relationships between the various physical quantities involved are sorted out, and corresponding calculation formulas and logical judgment processes are constructed and configured in RSCAD, a real-time power system simulation software. During design, only the design requirements (including grid frequency, AC system active power rating, holdover time, AC grid line voltage RMS value, AC current ripple percentage, AC inductor voltage loss percentage, AC capacitor reactive power percentage, carrier frequency, system efficiency, power factor, transformer secondary side rated line voltage, etc.) need to be provided. This algorithm can then be used to derive design parameters (including AC inductance, AC capacitance, damping resistance, DC voltage, DC bus capacitance, etc.). Combining these different parameter calculation methods forms a complete parameter design algorithm.

[0059] This step realizes the automation of wind turbine electrical parameter design. There is no need to manually perform complex parameter calculations one by one. By simply inputting the required wind turbine design parameters (such as grid frequency, AC system active rated power and other basic information), the required design parameters can be obtained quickly and accurately, greatly improving design efficiency. At the same time, it reduces the errors that may be caused by manual calculations, ensuring the scientific and reasonable nature of parameter design.

[0060] S2: Establish an RTDS real-time simulation model of a permanent magnet synchronous wind turbine in a real-time digital simulation system.

[0061] It should be noted that the modeling tools and module library provided by the RTDS platform are used to construct a model based on the actual physical structure, electrical characteristics, and interconnections between the components of a permanent magnet synchronous wind turbine. The model includes several key submodules, such as the AC grid equivalent module, which simulates the voltage, frequency, and other electrical characteristics of an actual grid. The grid-connected transformer model represents the voltage conversion function during power transmission. The back-to-back converter model is responsible for converting and controlling power between AC and DC. The permanent magnet synchronous generator model generates power based on input information such as mechanical torque. Through appropriate electrical connections and signal interaction, these submodules form a complete simulation model capable of simulating the operation of a real wind turbine. Furthermore, the model parameters are linked to the parameter design algorithm in step S1 through network tags to obtain accurate corresponding parameters.

[0062] This step provides a highly realistic virtual environment for subsequent simulation analysis. It can simulate the entire process of wind turbines from wind energy capture and electrical energy conversion to grid connection. It facilitates researchers to observe and analyze the operating status of the system under different operating conditions and different parameter configurations, such as the changes in physical quantities such as voltage, current, and power, and provides an intuitive basis for optimizing wind turbine design and control strategies.

[0063] S3: Input the required design parameters of the fan into the RTDS real-time simulation model, calculate the design parameters through the parameter design algorithm, and import the RTDS real-time simulation model into the RTDS real-time simulation platform for online simulation, and continuously correct and verify the correctness of the design parameters.

[0064] It should be noted that first, the required wind turbine design parameters (such as rated power, rated speed, and grid access requirements) are input into the constructed RTDS real-time simulation model. The associated parameter design algorithm then calculates the corresponding design parameters based on this input information according to established calculation rules and automatically updates them to the corresponding locations in the simulation model. The simulation model with the updated parameters is then imported into the RTDS real-time simulation platform, which simulates the timescale and physical processes of real-time power system operation. During this process, various operational data, such as the wind turbine's grid-connected voltage, current, and grid-connected power, are obtained and intuitively presented in waveform form. By comparing actual operating conditions with the expected design targets, the design parameters are continuously adjusted and revised. For example, if the grid voltage fluctuations are found to exceed the allowable range, the parameter design stage can be traced back to appropriately modify the relevant parameters such as capacitors and inductors, and the simulation verification can be repeated until all operating indicators meet the design requirements.

[0065] The method proposed in this embodiment uses a real-time digital simulation system (RTDS) as its core platform. It first implements the automated calculation of wind turbine electrical parameters by establishing a parameter design algorithm. It then constructs a corresponding RTDS real-time simulation model to simulate the actual wind turbine operating status. Finally, through a series of operations such as inputting design requirement parameters, calculating and updating model parameters, and online simulation, it implements repeated verification and correction of the design parameters, ensuring that the designed wind turbine parameters can meet the various requirements of actual power system operation, realizing an integrated process from design to simulation verification, and ensuring the performance and stability of the wind turbine.

[0066] Traditional wind turbine electrical parameter design often relies heavily on manual calculations and empirical judgment. This method, by constructing a parameter design algorithm, automatically calculates parameters based on given requirements, significantly improving design efficiency and accuracy while reducing labor costs and the risk of human error. Furthermore, leveraging the powerful real-time simulation capabilities of RTDS, the constructed simulation model can highly realistically simulate the actual operation of wind turbines and observe various operating data in real time, facilitating rapid problem identification and timely parameter adjustments. Compared to traditional non-real-time or simplified simulation methods, this method more closely resembles actual operating conditions, improving the reliability of design verification.

[0067] In one embodiment, the parameter design algorithm includes an AC inductance value calculation method, which is used to calculate the AC inductance value. The AC inductance value calculation method is as follows:

[0068] To ensure efficient use of DC voltage, the voltage drop caused by AC inductance is usually limited to less than 20% of the rated phase voltage. Therefore,

[0069]

[0070] In addition, the AC inductance value must also meet the requirements of the AC current ripple amplitude, which are:

[0071]

[0072] Therefore, in order to satisfy the above two equations, the AC inductance value is:

[0073]

[0074] In the above formula, is the AC inductance value; is the minimum AC inductance value, Output of the converter The per-unit value of the subharmonic line voltage peak value, is the DC voltage value, is the harmonic order, is the grid frequency, is the AC current ripple percentage, is the rated AC current value; is the maximum AC inductance value, is the AC inductor voltage loss percentage, is the effective value of the AC grid line voltage, is the angular frequency.

[0075] In one embodiment, the parameter design algorithm includes an AC capacitance value calculation method, which is used to calculate the AC capacitance value. The AC capacitance value calculation method is as follows:

[0076] When selecting an AC capacitor, the main considerations are the reactive power it absorbs and the resonant frequency of the filter. Typically, the reactive power it absorbs is limited to 5% of the rated active power. Therefore, we have:

[0077]

[0078] In addition, in order to avoid the resonance problem caused by the LC filter, its resonant frequency is usually set in the range of 10 times the grid base frequency to 0.5 times the carrier frequency, that is:

[0079]

[0080] The AC capacitance value cannot satisfy both of the above equations at the same time, prompting the user to change the design requirements or make a compromise between the two indicators. Therefore, the AC capacitance value is:

[0081]

[0082]

[0083] In the above formula, and The AC capacitance values calculated based on the first maximum AC capacitance value and the second maximum AC capacitance value are respectively, and the final AC capacitance value is and The values that satisfy the above inequalities at the same time; is the first maximum AC capacitance value, It is the percentage of reactive power absorbed by AC capacitor to rated active power. is the rated active power of the AC system, is the angular frequency, is the effective value of the AC grid line voltage; is the minimum AC capacitance value, is the carrier frequency, is the AC inductance value; is the second largest AC capacitance value, is the grid frequency.

[0084] In one embodiment, the parameter design algorithm includes a damping resistance value calculation method, which is used to calculate the damping resistance value. The damping resistance value calculation method is as follows:

[0085] In order to reduce the gain of the filter at the resonant frequency, an appropriate damping resistor should be selected so that the quality factor of the filter is in the range of 3 to 5. The quality factor of the LC filter is calculated as follows:

[0086]

[0087] Once the AC inductance and AC capacitance are determined, the damping resistance can be calculated using the following formula:

[0088]

[0089] Where, is the damping resistance value, is the quality factor, is the AC inductance value, is the AC capacitance value; the damping resistance value The value of satisfies the quality factor In the range of 3 to 5.

[0090] In one embodiment, the parameter design algorithm includes a DC voltage value design method, which is used to calculate the DC voltage value. The DC voltage value design method is as follows:

[0091] In order to prevent the system from over-modulation, the appropriate converter DC capacitor voltage should be selected. Usually, the modulation ratio should be less than 1 ( ), considering the 5% error range, the selection range of DC voltage is:

[0092]

[0093] In order to ensure the appropriate DC voltage utilization, the DC voltage value is:

[0094]

[0095] Where, is the DC voltage value, is the effective value of the AC phase voltage, is the maximum modulation ratio.

[0096] In one embodiment, the parameter design algorithm includes a DC bus capacitance value design method, which is used to calculate the DC bus capacitance value. The DC bus capacitance value design method is as follows:

[0097] The selection of DC bus capacitor mainly considers its maintenance time for the power grid To avoid the influence of the load, it is necessary to ensure that the energy stored in the DC bus capacitor can support the output power of the converter at rated power within the maintenance time. This process can be expressed as follows:

[0098]

[0099] By shifting the terms, we can get the range of DC bus capacitance values, which is usually maintained for one fundamental cycle:

[0100]

[0101] Therefore, the DC bus voltage is:

[0102]

[0103] Where, is the DC bus capacitance value, is the rated active power of the AC system, To maintain time, is the DC voltage value, For system efficiency.

[0104] In one embodiment, a RTDS real-time simulation model of a permanent magnet synchronous wind turbine generator is established in RSCAD in combination with voltage and current dual-loop control. Figure 2 As shown, this part of the model parameters is obtained from step S1 through the network label, such as Figure 2The mechanical torque and rotor speed generated by the wind turbine module are transmitted to the permanent magnet direct-drive generator module. Combined with the grid-side control module and the generator-side control module's control of the back-to-back converter, the electrical energy is fed into the AC grid. The control parameters of the entire system are per-unit values.

[0105] The permanent magnet direct drive generator module includes an AC grid equivalent module, a grid-connected transformer model, a back-to-back converter model and a permanent magnet synchronous generator model, and its parameters are given by the algorithm described in step S1.

[0106] The function of the grid-side control module is to control the power and voltage of the wind turbine. It adopts dual-loop control. The control model of the inner loop in RSCAD is as follows: Figure 3 As shown in Figure 1, the main goal of the inner loop control is to quickly and accurately control the current. Through the adjustment of the PI controller, the inner loop can quickly respond to changes in current, reduce current fluctuations, and ensure that the actual current can closely track the reference current. The outer loop control model is as follows: Figure 4 As shown in the figure, the outer loop generates the reference signal required by the inner loop based on the overall system operating requirements. The outer loop generates feedback by measuring the system's macro variables (such as power and voltage), comparing them with setpoints to generate an error signal. The outer loop then makes adjustments based on this error signal to generate the reference signal for the inner loop. Through dual-loop control, the system achieves a balance between fast dynamic response and precise steady-state control. The inner loop's fast response suppresses current fluctuations, while the outer loop's macro adjustments ensure that the system output meets overall operating requirements, thereby improving the performance and stability of the entire system.

[0107] The function of the machine-side converter control module is to achieve maximum power tracking of the wind turbine and control the stator voltage of the generator. It also adopts dual-loop control. The inner loop control model in RSCAD is as follows: Figure 5 As shown, the inner loop control mainly uses relevant controllers to achieve fast and accurate control of specific variables. In the machine-side converter control module, the goal of the inner loop control is to accurately control the current. The inner loop uses relevant control elements such as the PI (proportional-integral) controller. The PI controller adjusts the output according to the input error signal (the difference between the actual current value and the reference current value). For example, it receives the reference value of the machine-side current and the feedback value obtained by actual measurement, and makes adjustments by calculating the error between the two. When current fluctuations occur during system operation, the inner loop can respond quickly. Due to the characteristics of the PI controller, it can quickly adjust the output signal to reduce current fluctuations and ensure that the actual current can closely track the reference current value. This is crucial for the stable operation of the machine-side converter, because accurate current control helps maintain the stability and efficiency of the entire power generation system. The outer loop control model is as follows Figure 6As shown in the figure, in the generator-side converter control module, the outer loop control primarily implements maximum power tracking (MPPT) for the wind turbine and controls the generator stator voltage. The outer loop generates feedback by measuring macroscopic variables in the system. For example, for MPPT, it measures the actual turbine power and compares it with a set maximum power reference value to generate a power error signal. For stator voltage control, it measures the actual generator stator voltage and compares it with a set stator voltage reference value to generate a voltage error signal. Based on these error signals, the outer loop makes adjustments accordingly. Based on a specific control algorithm, it combines the current system operating status and the set control objectives to generate the reference signal required by the inner loop. Through dual-loop control, the generator-side converter control module achieves an optimal balance between fast dynamic response and precise steady-state control. The fast response of the inner loop effectively suppresses current fluctuations and ensures current stability. The macroscopic regulation of the outer loop ensures that the system meets overall operating requirements for power output and stator voltage control. This synergistic effect significantly improves the performance and stability of the entire wind turbine system, enabling the wind turbine to efficiently track maximum power while maintaining a stable and appropriate range for the generator stator voltage.

[0108] Provide the wind turbine design parameters (including: grid frequency, AC system active rated power, hold time, AC grid line voltage RMS, AC current ripple percentage, AC inductor voltage loss percentage, AC capacitor reactive power percentage, carrier frequency, system efficiency, power factor, transformer secondary side rated line voltage) to the above RTDS simulation model. After starting the simulation, the model will automatically perform parameter design according to the algorithm described in step S1, and import the model into the RTDS real-time simulation platform for online simulation to verify the correctness of the design parameters. Through the RUNTIME module of RTDS, the grid-connected voltage, current, and grid-connected power waveforms of the designed wind turbine can be obtained, such as Figure 7 shown.

[0109] To verify the correctness of design parameters, compare the actual simulated waveforms with theoretical expectations. If the design parameters are correct, the grid-connected voltage and current waveforms should be close to standard sine waves, with frequency and amplitude meeting the set requirements and remaining stable under different operating conditions. The grid-connected power waveform should be consistent with the theoretical power output curve, smoothly reflecting the system's operating status. Any waveform distortion, abnormal amplitude, or frequency fluctuations indicate a problem with the design parameters and require adjustment.

[0110] The present invention is based on the RTDS real-time simulation platform and builds a real-time simulation model of a wind power generation system in RSCAD. Only system design requirements such as system rated power, grid voltage, current ripple, and voltage loss need to be provided to automatically calculate design parameters such as AC filter inductance, AC filter capacitor, damping resistor, back-to-back converter DC voltage, and DC capacitor, completing the design of the wind power generation system. Simultaneously, the parameters in the RTDS real-time simulation model are automatically modified. The RTDS system immediately detects parameter changes and applies the new parameter values to the calculation and simulation of the model in the next simulation step, thereby achieving dynamic adjustment of parameters in the real-time simulation process of the wind power generation system and performing real-time simulation. The correctness of the design is then verified based on waveforms such as grid-connected voltage, current, and grid-connected power.

[0111] The principle behind automatic parameter modification in RTDS real-time simulation models is that the system monitors model parameters in real time. At the start of the next simulation step, the system recalculates the state variables of each electrical component, such as voltage, current, and power, based on the updated parameter values. This continuous cycle of parameter detection, updating, and calculation enables dynamic adjustment of wind power system simulation model parameters, providing data support for design parameter optimization and verification.

[0112] Based on the same inventive concept, the embodiment of the present application also provides an RTDS-based wind turbine electrical parameter design and real-time simulation device for implementing the above-mentioned RTDS-based wind turbine electrical parameter design and real-time simulation method. The implementation solution provided by the device is similar to the implementation solution described in the above-mentioned method. Therefore, the specific limitations in the embodiment of the RTDS-based wind turbine electrical parameter design and real-time simulation device provided below can be found in the above-mentioned limitations on the RTDS-based wind turbine electrical parameter design and real-time simulation method, and will not be repeated here.

[0113] See also Figure 8 This embodiment provides a wind turbine electrical parameter design and real-time simulation device based on RTDS, including:

[0114] An algorithm setting module is used to establish a parameter design algorithm in a real-time digital simulation system; the parameter design algorithm is used to calculate corresponding design parameters based on given fan design requirement parameters;

[0115] A model building module is used to build an RTDS real-time simulation model of a permanent magnet synchronous wind turbine in a real-time digital simulation system;

[0116] The simulation verification module is used to input the required design parameters of the fan into the RTDS real-time simulation model, calculate the design parameters through the parameter design algorithm, and import the RTDS real-time simulation model into the RTDS real-time simulation platform for online simulation, and continuously correct and verify the correctness of the design parameters.

[0117] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the system can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0118] Reference Figure 9 An embodiment of the present invention further provides a computer device, comprising: a memory and a processor and a computer program stored in the memory. When the computer program is executed on the processor, the RTDS-based wind turbine electrical parameter design and real-time simulation method as described in any one of the above methods is implemented.

[0119] The computer device may be a desktop computer, notebook computer, PDA, cloud server or other computing device. The computer device may include, but is not limited to, a processor and a memory. It will be understood by those skilled in the art that Figure 9 The computer device is merely an example and does not constitute a limitation on the computer device. The computer device may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the computer device may also include input and output devices, network access devices, etc.

[0120] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0121] In some embodiments, the memory may be an internal storage unit of the computer device, such as a hard drive or memory of the computer device. In other embodiments, the memory may also be an external storage device of the computer device, such as a plug-in hard drive, a Smart Media Card (SMC), a Secure Digital (SD) card, a flash memory card, etc. equipped with the computer device. Furthermore, the memory may include both an internal storage unit of the computer device and an external storage device. The memory is used to store an operating system, application programs, a boot loader, data, and other programs, such as the program code of the computer program. The memory may also be used to temporarily store data that has been output or is about to be output.

[0122] An embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method for designing and simulating electrical parameters of a wind turbine generator system based on RTDS and in real time is implemented.

[0123] In this embodiment, if the integrated unit is implemented as a software functional unit and sold or used as a standalone product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application can implement all or part of the process steps in the above-mentioned method embodiments by using a computer program to instruct the relevant hardware. The computer program can be stored in a computer-readable storage medium. When executed by a processor, the computer program can implement the steps of each of the above-mentioned method embodiments. The computer program includes computer program code, which can be in source code form, object code form, executable file, or some intermediate form. The computer-readable medium can include at least: any entity or device capable of carrying computer program code to a camera / terminal device, recording medium, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signals, telecommunication signals, and software distribution media. Examples include USB flash drives, removable hard drives, magnetic disks, or optical disks. In some jurisdictions, based on legislation and patent practice, computer-readable media cannot be electric carrier signals or telecommunication signals.

[0124] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0125] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0126] In the embodiments disclosed in the present application, it should be understood that the disclosed devices / terminal equipment and methods can be implemented in other ways. For example, the device / terminal equipment embodiments described above are merely schematic. For example, the division of the modules or units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0127] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A wind turbine electrical parameter design and real-time simulation method based on RTDS, characterized in that: The steps include: Establishing a parameter design algorithm in a real-time digital simulation system; the parameter design algorithm is used to calculate corresponding design parameters based on given fan design requirement parameters; Establishing an RTDS real-time simulation model of a permanent magnet synchronous wind turbine in the real-time digital simulation system; The wind turbine design requirement parameters are input into the RTDS real-time simulation model, the design parameters are calculated using the parameter design algorithm, and the RTDS real-time simulation model is imported into the RTDS real-time simulation platform for online simulation, and the correctness of the design parameters is continuously corrected and verified.

2. The wind turbine generator electrical parameter design and real-time simulation method based on RTDS according to claim 1, characterized in that: The parameter design algorithm includes a method for calculating the AC inductance value, and the calculation expression of the AC inductance value is as follows: Where, is the AC inductance value; is the minimum AC inductance value, Output of the converter The per-unit value of the subharmonic line voltage peak value, is the DC voltage value, is the harmonic order, is the grid frequency, is the AC current ripple percentage, is the rated AC current value; is the maximum AC inductance value, is the AC inductor voltage loss percentage, is the effective value of the AC grid line voltage, is the angular frequency.

3. The wind turbine generator electrical parameter design and real-time simulation method based on RTDS according to claim 1, characterized in that: The parameter design algorithm includes a method for calculating the AC capacitance value, and the calculation expression of the AC capacitance value is as follows: Where, and The AC capacitance values calculated based on the first maximum AC capacitance value and the second maximum AC capacitance value are respectively, and the final AC capacitance value is and The values that satisfy the above inequalities at the same time; is the first maximum AC capacitance value, It is the percentage of reactive power absorbed by AC capacitor to rated active power. is the rated active power of the AC system, is the angular frequency, is the effective value of the AC grid line voltage; is the minimum AC capacitance value, is the carrier frequency, is the AC inductance value; is the second maximum AC capacitance value, is the grid frequency.

4. The wind turbine generator electrical parameter design and real-time simulation method based on RTDS according to claim 1, characterized in that: The parameter design algorithm includes a damping resistance value calculation method, and the calculation expression of the damping resistance value is as follows: Where, is the damping resistance value, is the quality factor, is the AC inductance value, is the AC capacitance value; the damping resistance value The value of satisfies the quality factor In the range of 3 to 5.

5. The wind turbine generator electrical parameter design and real-time simulation method based on RTDS according to claim 1, characterized in that: The parameter design algorithm includes a DC voltage value design method, and the calculation expression of the DC voltage value is as follows: Where, is the DC voltage value, is the effective value of the AC phase voltage, is the maximum modulation ratio.

6. The wind turbine generator electrical parameter design and real-time simulation method based on RTDS according to claim 1, characterized in that: The parameter design algorithm includes a DC bus capacitance value design method, and the calculation expression of the DC bus capacitance value is as follows: Where, is the DC bus capacitance value, is the rated active power of the AC system, To maintain time, is the DC voltage value, For system efficiency.

7. The wind turbine electrical parameter design and real-time simulation method based on RTDS according to claims 1-6 is characterized in that: The RTDS real-time simulation model of the permanent magnet synchronous wind turbine includes: Permanent magnet direct-drive generator module, grid-side control module and generator-side converter control module; The permanent magnet direct drive generator module is used to realize the conversion of mechanical energy into electrical energy, and simulates the grid environment, adapts to the grid voltage and completes the conversion of electrical energy through various internal submodules; The grid-side control module is used to control the power and voltage of the wind turbine; The generator-side converter control module is used to achieve maximum power tracking of the wind turbine and control the stator voltage of the generator.

8. A wind turbine electrical parameter design and real-time simulation device based on RTDS, characterized in that: include: Algorithm setting module, used to establish parameter design algorithm in real-time digital simulation system; The parameter design algorithm is used to calculate corresponding design parameters according to given fan design requirement parameters; A model building module is used to establish an RTDS real-time simulation model of a permanent magnet synchronous wind turbine in the real-time digital simulation system; The simulation verification module is used to input the wind turbine design requirement parameters into the RTDS real-time simulation model, calculate the design parameters through the parameter design algorithm, and import the RTDS real-time simulation model into the RTDS real-time simulation platform for online simulation, and continuously correct and verify the correctness of the design parameters.

9. A computer device, characterized in that: The device includes a processor and a memory: The memory is used to store the computer program and send instructions of the computer program to the processor; The processor executes the wind turbine electrical parameter design and real-time simulation method based on RTDS according to any one of claims 1 to 7 according to the instructions of the computer program.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by the processor, the method for designing and simulating electrical parameters of a wind turbine generator system based on RTDS according to any one of claims 1 to 7 is implemented.

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