Simulation platform for converter of wind generating set

Abstract

The utility model discloses a wind generating set converter simulation platform, which comprises a dragging motor module, a generator and a control system, and is characterized in that the dragging motor module is connected with the generator through mechanical transmission, and the mechanical transmission is used for transmitting rotating speed and torque; the mechanical transmission mode is gear-gear transmission; the generator is used for simulating the actual operation state of the wind generating set. The control system and the dragging motor module are connected with a signal line, and the control system is used for adjusting the rotating speed and the torque of the dragging motor module; the control system is connected with the generator and used for adjusting output electric energy of the generator. According to the utility model, through cooperation of the dragging motor module and the generator, actual operation states of the wind generating set under different wind speeds and load conditions can be effectively simulated, a real grid-connected power generation working condition is provided, and a training effect is closer to an actual application scene. And meanwhile, equipment requirements are reduced, the total cost of the platform is reduced, and the platform is more suitable for environments such as training institutions and laboratories.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of electric power simulation training, especially to a wind turbine generator system converter simulation platform. BACKGROUND

[0002] At present, there are generally two routes for wind turbine generator system converter training platform in the industry. One is to use the generator to drag the way to carry out wind power converter training, which is through the combination of two generators and two converters, one of which is combined as a drag motor, and the other as an actual generator to simulate the real working condition of wind power generation. However, this method requires two sets of equipment, which is relatively high in cost. The other way is to connect the converter with a three-phase asynchronous motor, and adjust the rotating speed and direction of the motor by controlling the output of the converter to realize the function of training. Although this method is low in cost, it uses the converter as a frequency converter, which is inconsistent with the actual operating environment of the wind turbine generator system, and cannot accurately play the role of training. SUMMARY

[0003] In view of the above problems, the present application provides a wind turbine generator system converter simulation platform, which solves the problems of high cost of wind turbine generator system converter training platform and inability to simulate the actual operating state of wind turbine generator system.

[0004] To achieve the purpose of the present application, the present application provides the following technical solutions:

[0005] A wind turbine generator system converter simulation platform, comprising: a drag motor module, a generator, a control system;

[0006] The drag motor module is connected with the generator through mechanical transmission, and the mechanical transmission is used to transmit the rotating speed and torque; the mechanical transmission mode is gear transmission;

[0007] The generator is used to simulate the actual operating state of the wind turbine generator system;

[0008] The control system is connected with the drag motor module through a signal line, and the control system is used to adjust the rotating speed and torque of the drag motor module; the control system is connected with the generator and used to adjust the output power of the generator.

[0009] In a possible implementation, the drag motor module comprises a drag frequency converter and a motor, the control system adjusts the rotating speed and torque of the motor through the drag frequency converter, and the rotating speed and torque are transmitted between the motor and the generator through the mechanical transmission.

[0010] In a possible implementation, the platform further comprises a power supply module, which is connected with the drag motor module and supplies power for the drag motor module, and which is connected with the generator and supplies power for the generator; the power supply module is arranged between the generator and the control system, and the control system controls the adjustment of the output power of the generator through the power supply module.

[0011] In a possible implementation, the power supply module comprises a power grid system, which is used to supply power for the drag motor module and the generator.

[0012] In a possible implementation, the power supply module further comprises a transformer, which is connected with the power grid system and is used to adjust the input voltage of the power supply module.

[0013] In a possible implementation, the power supply module further comprises a converter module, which comprises a cabinet and a frequency converter, a current transformer, a sensor and a processor arranged in the cabinet;

[0014] The converter adopts a bidirectional converter, which comprises a machine-side converter and a grid-side converter, the machine-side converter is connected with the generator, the grid-side converter is connected with the transformer, and the machine-side converter and the grid-side converter are respectively connected with the processor; the control system is connected with the processor, and is used to control the output power of the converter to adjust the operating state of the generator, and is used to transmit operating data to the processor.

[0015] In a possible implementation, the platform further comprises a display, which is connected with the processor and is used to display the platform data acquired and processed by the processor, including the operating state and real-time data of the drag motor module, the generator and the control system.

[0016] In a possible implementation, the mechanical transmission mode can also be one of a belt, a chain and a pulley.

[0017] In a possible implementation, the platform further comprises a base, and the motor and the generator are mounted on the base.

[0018] By the wind turbine generator converter simulation platform provided in the application, the actual running state of the wind turbine generator under different wind speeds and load conditions can be effectively simulated by cooperation of the drag motor module and the generator, and a real grid-connected power generation working condition is provided, so that the training effect is closer to the actual application scene. Compared with the traditional scheme of using two sets of generator and converter systems, the embodiment adopts the mode of motor driving the generator, reduces the equipment demand, reduces the overall cost of the platform, and significantly improves the economy, so that it is more suitable for training institutions and laboratory environments. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are included to provide a further understanding of the application, and constitute a part of the specification, which together with the embodiments of the application, serve to explain the application, and do not constitute a limitation on the application;

[0020] Figure 1 The training platform overall structure schematic diagram provided for the embodiment of the application;

[0021] Figure 2 The partial schematic diagram of the training platform provided for the embodiment of the application;

[0022] Reference signs:

[0023] 1, drag motor module; 1-1, drag frequency converter; 1-2, motor; 2, generator; 3, control system; 4, grid system; 5, transformer; 6, converter module; 6-1, grid-side converter; 6-2, machine-side converter; 7, display;

[0024] 8, gear; 9, base. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the application more clear, the technical scheme in the application will be described clearly and completely below in combination with the drawings in the application. Obviously, the described embodiments are part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application.

[0026] The terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features; in the description of the application, unless otherwise specified, the meaning of "multiple" is two or more.

[0027] The inventors of this invention have discovered that there are currently two main approaches to wind turbine converter simulation training platforms in the industry. One approach uses a generator-driven configuration, where two generators and two converters are paired. One generator acts as the drive motor, while the other serves as the actual generator, simulating real-world wind power generation conditions. However, this method requires two sets of equipment, resulting in higher costs. The other approach connects the converter to a three-phase asynchronous motor, controlling the converter's output to adjust the motor's speed and direction for training. While this method is lower in cost, it uses the converter as a frequency converter, which is inconsistent with the actual operating environment of wind turbines, thus failing to provide accurate training. Therefore, providing a wind turbine converter simulation platform that not only simulates the actual operating environment of wind turbines but also operates at a low cost presents a new challenge. Based on this, in the embodiment of the present invention provided by the inventor, an electric motor drives a generator, and the two are connected by gear transmission. This achieves higher transmission efficiency, a wider transmission ratio, higher precision and service life, and a more compact structure to connect the engine and the generator. Finally, grid-connected power generation is achieved through converter control, reaching the same state as a wind turbine generator set.

[0028] The following is combined Figures 1 to 2 The technical solution of this utility model is described as follows:

[0029] like Figure 1 The diagram illustrates a wind turbine generator converter simulation platform provided in this application embodiment. It features a compact design and comprehensive functions, effectively simulating the actual operating state of a wind turbine generator set and suitable for training purposes. The platform includes: a drive motor module 1, a generator 2, and a control system 3. The drive motor module 1 and generator 2 are mechanically connected, transmitting speed and torque via a gear 8 transmission. The generator 2 simulates the actual operating state of the wind turbine generator set. The control system 3 is connected to the drive motor module 1 via a signal line, regulating the speed and torque of the drive motor module 1. The control system 3 is also connected to the generator 2 and regulates its output power.

[0030] In this embodiment, the drive motor module 1 includes a drive frequency converter 1-1 and a motor 1-2, such as... Figure 2 As shown, the motor 1-2 can be, for example, a three-phase asynchronous motor 1-2, and the generator 2 can be, for example, a doubly-fed asynchronous generator 2. In one possible embodiment, the training platform also includes a base 9, on which the three-phase asynchronous motor 1-2 and the doubly-fed asynchronous generator 2 are mounted. In one possible embodiment, the mechanical transmission between the motor 1-2 and the generator 2 can be, in addition to gear transmission 8, a belt, chain, or pulley.

[0031] The control system 3 is the core control unit of the platform, which can manage the operation of the drag variable frequency device 1-1, the motor 1-2 and the generator 2 to ensure the common work of each module. The control system 3 adjusts the speed and torque of the motor 1-2 by adjusting the drag variable frequency device 1-1. Then the speed and torque are transmitted to the generator 2 through the gear 8; the control system 3 can also control the power output such as voltage, current and frequency of the generator 2, so as to control the grid-connected power generation process of the generator 2 and realize stable grid connection and energy transmission with the power grid. Through the mutual cooperation of the above-mentioned modules, the simulation working conditions under different wind speed conditions can be realized, thereby providing a variety of adjustable power generation states and grid connection conditions for training.

[0032] As a feasible implementation manner, the platform in the embodiment of the application as shown in Figure 1 The power supply module includes the power grid system 4, the transformer 5 and the converter module 6. Specifically, the power supply module is connected with the drag motor module 1 and supplies power for the drag motor module 1, and the power supply module is connected with the generator 2 and supplies power for the generator 2; the power supply module is arranged between the generator 2 and the control system 3, and the control system 3 controls and adjusts the output power of the generator 2 through the power supply module. The transformer 5 is connected with the power grid system 4 and is used to adjust the voltage input by the power supply module. The converter module 6 includes a cabinet and a frequency converter, a converter, a sensor and a processor arranged in the cabinet; the converter is a bidirectional converter, which includes a machine side converter 6-2 and a grid side converter 6-1, the machine side converter 6-2 is connected with the generator 2, the grid side converter 6-1 is connected with the transformer 5, and the machine side converter 6-2 and the grid side converter 6-1 are respectively connected with the processor; the control system 3 is connected with the processor and is used to control the output power of the converter to adjust the operating state of the generator 2 and to transmit the operating data to the processor.

[0033] In the embodiment of the present application, the power grid system 4 is connected with the drag frequency converter to provide power for the drag frequency converter; the power grid system 4, the transformer 5 and the converter module 6 are connected in sequence. The power grid system 4 provides power for the converter, but since the voltage of the power grid system 4 and the voltage of the converter module 6 are not matched, the transformer 5 needs to be arranged between the power grid system 4 and the converter module 6 to adjust the voltage output by the power grid system 4 to the voltage suitable for the converter module 6. For example, the voltage output by the power grid system 4 in the present application is 380V, and the voltage of the converter module 6 is 690V, so the transformer 5 module needs to be adjusted to increase the voltage to 690V and transmit the adjusted 690V voltage to the converter module 6. The functions of the power supply module in the platform include power supply, voltage adjustment, grid-connected control and the like. It ensures that the entire simulation platform operates under stable power conditions, and through the adjustment of the power parameters, the operating state of the simulated wind power generator 2 group under different working conditions is simulated. This design not only improves the operating efficiency of the platform, but also enhances the safety and stability of the platform, making the training process more intuitive and effective.

[0034] As a feasible implementation manner, the platform in the embodiment of the present application further comprises a display 7 connected with the processor, for displaying the platform data processed by the processor, including the operating state and real-time data of the drag motor module 1, the generator 2 and the control system 3.

[0035] In the embodiment of the present application, through the cooperation of the control system 3, the processor and the display 7, an intuitive user interface can be provided, through which the working state and feedback information of each component of the platform can be viewed, facilitating operation and learning. Specifically, the control system 3 collects the data of the drag motor module 1, the generator 2 and the converter, and then transmits the data to the processor. After receiving the data such as the rotating speed, torque, voltage and current from the drag motor, the generator 2 and the converter, the processor processes the received data, and then transmits the processed data to the display 7, so as to display the working state and operating parameters of the platform in real time.

[0036] Working principle:

[0037] When the utility model works, the power grid system 4 provides power for the transformer 5 and the drag frequency converter 1-1. The transformer 5 receives the 380V voltage from the power grid system 4, increases the voltage to 690V, and transmits the increased 690V voltage to the bidirectional converter. The bidirectional converter enters the standby state to prepare for the start of the power generation process.

[0038] The drag variable frequency device 1-1 receives power from the grid system 4 and controls the speed and torque of the three-phase asynchronous motor 1-2 by adjusting the output voltage and frequency. Specifically, the drag variable frequency device 1-1 adjusts the input parameters of the three-phase asynchronous motor 1-2 to maintain the speed close to 1200 rpm, which is the grid-connected speed, to simulate the typical operating state of the wind turbine generator 2 group. This process is controlled by the control system 3, which is connected to the drag variable frequency device 1-1 through signal lines and adjusts its operating parameters in real time to ensure that the three-phase asynchronous motor 1-2 works stably under different load conditions.

[0039] At the same time, the bidirectional converter receives 690V power from the transformer 5 and starts the connection process with the grid system 4. With the support of the background control software, the bidirectional converter performs operations such as closing the main circuit breaker, pre-charging, grid-side modulation, and machine-side modulation in sequence, gradually establishing a stable grid connection. The bidirectional converter realizes the grid-connected power generation state of the doubly-fed asynchronous generator 2 through doubly-fed wind cooling control. The control system 3 monitors and adjusts the output of the bidirectional converter during this process to ensure that the power output parameters of the generator 2, such as voltage, current, and frequency, are consistent with the grid requirements.

[0040] When the three-phase asynchronous motor 1-2 reaches the target speed and torque under the control of the control system 3, power is transmitted to the rotor of the doubly-fed asynchronous generator 2 through the gear 8. This transmission mode ensures that the power of the three-phase asynchronous motor 1-2 directly acts on the generator 2, enabling the generator 2 to obtain sufficient driving force to enter the power generation state. As the doubly-fed asynchronous generator 2 begins to generate power, the generated power is exchanged with the grid system 4 through the bidirectional converter, and the grid-connected power generation function of the platform is realized.

[0041] During power generation, the mechanical torque of the doubly-fed asynchronous generator 2 is transmitted in reverse through the gear 8 to the three-phase asynchronous motor 1-2, forming a power balance. This two-way energy transfer ensures load balance between the motor and the generator 2, simulating the actual operating state of the wind turbine generator 2 group under different loads. The three-phase asynchronous motor 1-2 will consume the power from the doubly-fed asynchronous generator 2, forming an energy cycle within the platform and further enhancing the simulation effect. The control system 3 continuously monitors this energy transfer process and adjusts the power generation state of the generator 2 according to the load conditions.

[0042] Users can adjust the output parameters of the drag variable frequency device 1-1, such as voltage and frequency, through the control system 3 to change the speed and torque of the three-phase asynchronous motor 1-2, thereby affecting the power generation state of the doubly-fed asynchronous generator 2. By adjusting the parameters of the control system 3, the platform can simulate power generation conditions under different wind speeds and load conditions to achieve the training purpose. After adjusting the parameters, the control system 3 will update and stabilize the power state of the generator 2 in real time to meet the simulation needs of different working conditions.

[0043] First, the power grid system 4 supplies power to the transformer 5 and the drag frequency converter 1-1 respectively. After receiving power from the power grid system 4, the drag frequency converter 1-1 controls the operating state of the three-phase asynchronous motor 1-2 by adjusting the output voltage and frequency. Specifically, the drag frequency converter 1-1 adjusts the input voltage and frequency of the three-phase asynchronous motor 1-2 to accurately control its speed and output torque, ensuring that the three-phase asynchronous motor 1-2 can operate stably under different loads and working conditions. Generally, the speed of the three-phase asynchronous motor 1-2 is controlled near the grid-connected speed of about 1200 rpm to simulate the actual working conditions of the wind turbine generator 2 group.

[0044] During the operation of the platform, the processor is responsible for collecting real-time data (including parameters such as speed, torque, voltage, and current) from the drag motor module 1, the generator 2, and the converter module 6, and transmitting the processed data to the display 7. The display 7 shows the working state and parameter changes of each module, which is convenient for users to intuitively monitor and operate. The display 7 works with the control system 3 and the processor to form a friendly human-machine interface, allowing operators to view the platform status in real time and make necessary operation adjustments to ensure stable and safe operation of the platform.

[0045] The advantages of the training platform according to the embodiments of the present application are as follows: The training platform can effectively simulate the actual operating state of the wind turbine generator group under different wind speeds and load conditions by cooperating the drag motor module with the generator, providing a real grid-connected power generation working condition, and making the training effect closer to the actual application scenario. Compared with the traditional scheme of using two sets of generators and converters, the embodiments of the present application use the method of driving the generator by the motor, which reduces the equipment demand, reduces the overall cost of the platform, and significantly improves the economy, making it more suitable for training institutions and laboratories and other environments. At the same time, the control system provides a more convenient operation mode for the platform, and the display interface provided by the display for the platform is more friendly and intuitive for training simulation.

[0046] In several embodiments provided in the present application, it should be understood that the disclosed system, module and method can be implemented in other ways. For example, the above-described module embodiments are only schematic, for example, the division of units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed each other can be through some interface, indirect coupling or communication connection between modules or units, which can be electrical, mechanical or other forms.

[0047] The above examples are only used to illustrate the technical solutions of the present application, but not to limit them. The present application is not limited to the exact structure as has been described above and shown in the drawings, and the specific implementation of the present application should not be considered as limited to these descriptions. Any changes and modifications made by those skilled in the art without departing from the concept of the present application should be considered as falling within the scope of the present application.

Claims

1. A wind turbine generator system converter simulation platform, characterized by, The platform comprises: a dragging motor module, a generator, and a control system; the dragging motor module is connected with the generator through a mechanical transmission, which is used for transmitting rotational speed and torque; the mechanical transmission mode is gear transmission; the generator is used for simulating the actual operation state of a wind turbine generator system; the control system is connected with the dragging motor module through a signal line, and is used for adjusting the rotational speed and torque of the dragging motor module; the control system is connected with the generator, and is used for adjusting the output power of the generator.

2. A wind turbine converter simulator platform according to claim 1, characterized in that, the dragging motor module comprises a dragging frequency converter and a motor, the control system adjusts the rotational speed and torque of the motor through the dragging frequency converter, and the motor and the generator transmit rotational speed and torque through the mechanical transmission.

3. The wind turbine generator converter simulator platform according to claim 1, wherein, The platform further comprises a power supply module, which is connected with the dragging motor module and supplies power for the dragging motor module, and is connected with the generator and supplies power for the generator; the power supply module is arranged between the generator and the control system, and the control system controls and adjusts the output power of the generator through the power supply module.

4. The wind turbine generator system converter simulator platform according to claim 3, wherein, The power supply module comprises a power grid system, which is used for supplying power for the dragging motor module and the generator.

5. A wind turbine generator converter simulator platform according to claim 4, wherein, The power supply module further comprises a transformer, which is connected with the power grid system and is used for adjusting the input voltage of the power supply module.

6. A wind turbine generator converter simulator platform according to claim 5, wherein, The power supply module further comprises a converter module, which comprises a cabinet and a frequency converter, a converter, a sensor and a processor arranged in the cabinet; the converter is a bidirectional converter, which comprises a machine-side converter and a grid-side converter, the machine-side converter is connected with the generator, the grid-side converter is connected with the transformer, and the machine-side converter and the grid-side converter are respectively connected with the processor; the control system is connected with the processor, and is used for controlling the output power of the converter to adjust the operation state of the generator, and is used for transmitting operation data to the processor.

7. A wind turbine generator converter simulator platform according to claim 6, wherein, The platform further comprises a display, which is connected with the processor and is used for displaying platform data acquired and processed by the processor, including the operation state and real-time data of the dragging motor module, the generator and the control system.

8. The wind turbine generator system converter simulator platform of claim 1, wherein, The mechanical transmission mode can also be one of a belt, a chain and a pulley.

9. A wind turbine generator converter simulator platform according to claim 2, wherein, The platform further comprises a base, and the motor and the generator are installed on the base.

Images