Impedance testing device for wind driven generator

Abstract

The utility model provides a wind driven generator impedance testing device, which comprises a notebook computer and a testing device case, a real-time control card and an analog digital IO card are integrated in the testing device case, the notebook computer is in communication connection with the real-time control card in the testing device case, and the analog digital IO card is in communication connection with the real-time control card in the testing device case. The real-time control card is connected with a fan controller to be tested through the analog digital IO card. According to the wind driven generator impedance testing device, the to-be-tested fan controller can be tested only by using one testing case and one notebook computer, and the wind driven generator impedance testing device is convenient to carry and transport; according to the invention, the impedance test of the to-be-tested fan controller can be realized only by connecting the external wiring related to the to-be-tested fan controller without wiring of internal test parts, so that the complexity of the test wiring is reduced, and the test efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power system analysis, in particular to an impedance testing device for a wind turbine generator. Background Art

[0002] In recent years, clean energy generation has attracted much attention, and the rapid development of new technologies has led to a continuous increase in the scale and economic benefits of wind power generation. However, after the wind turbines are connected to the power system, the oscillation characteristics of the power system in the subsynchronous frequency and supersynchronous frequency range are complex and changeable. By obtaining the impedance characteristics of wind turbines in the subsynchronous frequency and supersynchronous frequency range, we can effectively understand the impact of wind turbine access on the subsynchronous frequency and supersynchronous frequency damping characteristics of the power grid.

[0003] At present, the characteristic impedance of power equipment in the subsynchronous frequency and supersynchronous frequency range is tested by using an impedance scanning signal generator and a real-time simulation device. When testing the controller of the power equipment under test, the wiring between the scanning signal generator, the real-time simulation device and the power equipment controller is complicated, and the debugging time for setting up the experimental environment is very long. In addition, due to the large number of test equipment, it is not convenient to move to the site for testing. Utility Model Content

[0004] In view of this, the present invention provides a wind turbine generator impedance testing device to solve at least one of the above-mentioned problems.

[0005] In order to achieve the above purpose, the utility model adopts the following scheme:

[0006] An embodiment of the utility model provides a wind turbine impedance test device, which includes: a laptop computer and a test device chassis, wherein a real-time control card and an analog digital IO card are integrated in the test device chassis, the laptop computer is communicatively connected to the real-time control card in the test device chassis, and the real-time control card is connected to the wind turbine controller to be tested through the analog digital IO card.

[0007] As an embodiment of the present invention, the above-mentioned laptop computer includes a scanning control module, a circuit modeling module and an impedance analysis module.

[0008] As an embodiment of the utility model, the above-mentioned real-time control card includes a test signal generator, a digital circuit model and a recorder, the digital circuit model is connected to the test signal generator and the recorder respectively, the scanning control module of the laptop computer is connected to the test signal generator, the circuit modeling module is connected to the digital circuit model, and the impedance analysis module is connected to the recorder.

[0009] As an embodiment of the utility model, the above-mentioned laptop computer and the real-time control card are connected via an Ethernet cable, and data communication between each module in the laptop computer and each part in the real-time control card is achieved through different ports using the TCP / IP protocol.

[0010] As an embodiment of the utility model, the above-mentioned analog digital IO card includes a digital analog output circuit and a digital analog input circuit, and the digital analog output circuit and the digital analog input circuit are respectively connected to the wind turbine controller to be tested and are respectively connected to the digital circuit model.

[0011] As an embodiment of the utility model, the analog quantities between the analog digital IO card and the wind turbine controller to be tested are connected via a multi-channel SPI bus, each analog quantity occupies one SPI data channel, and the analog quantities share clock and chip select signals.

[0012] As an embodiment of the present utility model, the analog digital IO card is connected to the wind turbine controller to be tested via ±10V analog voltage signals and 24V digital IO signals.

[0013] As an embodiment of the utility model, the above-mentioned test device chassis adopts a 1U19-inch chassis, the real-time control card adopts an sbRIO-9608 single-board controller configured with an XC7A200T FPGA chip and an Intel E3805 processor, and the analog digital IO card is configured with 24-channel 16-bit, 250ksps digital-to-analog converters and 12-channel 16-bit, 250ksps analog-to-digital converters, 24-channel 5-24V switching input circuits, and 24-channel 5-24V switching output circuits.

[0014] The wind turbine impedance test device proposed in the utility model only needs a test chassis and a laptop computer to realize the test of the wind turbine controller to be tested. It is a wind turbine impedance test device that is easy to carry and transport. Moreover, in this embodiment, it is only necessary to connect the external wiring involved in the wind turbine controller to be tested to realize the impedance test of the wind turbine controller to be tested, without the need to connect the internal test components, thereby reducing the complexity of the test wiring and improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0016] Figure 1 It is a structural schematic diagram of a wind turbine impedance testing device provided in an embodiment of the present application.

[0017] Figure Number:

[0018] 1: Laptop;

[0019] 2: Scan control module;

[0020] 3: Circuit modeling module;

[0021] 4: Impedance analysis module;

[0022] 5: Test device chassis;

[0023] 6: Real-time control card;

[0024] 7: Test signal generator;

[0025] 8: Digital circuit model;

[0026] 9: Wave recorder;

[0027] 10: Analog digital IO card;

[0028] 11: Digital analog output circuit;

[0029] 12: Digital analog input circuit;

[0030] 13: Fan controller to be tested. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiment of the utility model more clear, the embodiment of the utility model is further described in detail below in conjunction with the accompanying drawings. Here, the illustrative embodiment of the utility model and its description are used to explain the utility model, but are not used as a limitation of the utility model.

[0032] In the present invention, the terms "upper", "lower", "inner", "outer", "middle", "top" and "bottom" indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have specific positions, or to be constructed and operated in specific positions.

[0033] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

[0034] In addition, the terms "disposed" and "connected" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0035] like Figure 1 The figure shows a schematic diagram of the structure of a wind turbine impedance test device provided in an embodiment of the present application, the device comprising: a laptop computer 1 and a test device chassis 5, wherein a real-time control card 6 and an analog digital IO card 10 are integrated in the test chassis 5, the laptop computer 1 and the real-time control card 6 in the test device chassis 5 are communicatively connected, and the real-time control card 6 is connected to the wind turbine controller 13 to be tested via the analog digital IO card 10.

[0036] Preferably, the laptop computer 1 of this embodiment includes a scanning control module 2 , a circuit modeling module 3 and an impedance analysis module 4 .

[0037] Preferably, the real-time control card 6 of the present embodiment comprises a test signal generator 7, a digital circuit model 8 and a wave recorder 9, wherein the digital circuit model 8 is connected to the test signal generator 7 and the wave recorder 9 respectively, and the scanning control module 2 of the laptop computer 1 is connected to the test signal generator 7, the circuit modeling module 3 is connected to the digital circuit model 8, and the impedance analysis module 4 is connected to the wave recorder 9. Specifically, the laptop computer 1 of the present embodiment is connected to the real-time control card 6 via an Ethernet cable, and the scanning control module 2, the circuit modeling module 3 and the impedance analysis module 4 inside the laptop computer 1 and the test signal generator 7, the digital circuit model 8 and the wave recorder 9 in the real-time control card 6, the data communication between them is realized by using different ports of the TCP / IP protocol.

[0038] Preferably, the analog digital IO card 10 comprises a digital analog output circuit 11 and a digital analog input circuit 12 , wherein the digital analog output circuit 11 and the digital analog input circuit 12 are respectively connected to a wind turbine controller 13 to be tested, and are respectively connected to a digital circuit model 8 .

[0039] Preferably, the analog quantity between the analog digital IO card 10 and the fan controller 13 to be tested can be connected via a multi-channel SPI bus, and each analog quantity occupies one SPI data channel, and the analog quantities share a clock and a chip select signal. Specifically, the analog digital IO card 10 and the fan controller 13 to be tested are connected via ±10V analog voltage signals and 24V digital IO signals.

[0040] Preferably, the chassis of the test device 5 can be a 1U 19-inch chassis, the real-time control card 6 can be a sbRIO-9608 single-board controller equipped with an XC7A200T FPGA chip and an Intel E3805 processor, and the analog digital IO card 10 is equipped with 24 16-bit, 250ksps digital-to-analog converters and 12 16-bit, 250ksps analog-to-digital converters, 24 5-24V switch input circuits, and 24 5-24V switch output circuits. Table 1 shows the connection relationship and data flow table between the real-time control card 6 and the interface of the wind turbine controller to be tested.

[0041] Table 1

[0042]

[0043]

[0044] The operation mode of the above-mentioned structure is explained below. It should be pointed out that the method flow involved in the operation mode introduced here are all existing technologies. As mentioned above, the innovation of the present application does not lie in the innovation of the test process, but in the improvement of the structure and connection relationship, so that the wind turbine impedance test device of the present application becomes a wind turbine impedance test device that is easy to carry and transport. Moreover, before the test starts, it is only necessary to connect the external wiring of the wind turbine controller to be tested to realize the impedance test of the wind turbine controller to be tested, without the need to connect the internal test components, thereby reducing the complexity of the test wiring and improving the test efficiency.

[0045] Before starting the experiment, the circuit modeling module 3 is used to establish the main circuit model and the power grid model corresponding to the wind turbine controller 13 to be tested, and the model is downloaded to the real-time control card 6. After starting the experiment, the scanning control module 2 controls the test signal generator 7 to output scanning signals of different frequencies and phases. The signal is applied to the power grid model in the digital circuit model 8 as a disturbance signal. The solution result of the digital circuit model 8 is sent to the IO port of the wind turbine controller 13 to be tested through the port of the digital analog output circuit 11.

[0046] The control signal returned by the fan controller 13 to be tested is first converted into digital by the digital analog input circuit 12, and the digitized signal is sent to the digital circuit model 8 for real-time calculation to determine the next state, thus forming a complete closed-loop feedback loop.

[0047] During the experiment, the recorder 9 continuously records the signals in the digital circuit model 8 in real time and sends them to the impedance analysis software for impedance analysis to calculate the impedance of the wind turbine controller 13 under different test conditions.

[0048] From the foregoing, it can be seen that the wind turbine impedance test device proposed by the utility model only needs a test chassis and a laptop computer to realize the test of the wind turbine controller to be tested. It is a wind turbine impedance test device that is easy to carry and transport. Moreover, in this embodiment, it is only necessary to connect the external wiring involved in the wind turbine controller to be tested to realize the impedance test of the wind turbine controller to be tested, without the need to connect the internal test components, thereby reducing the complexity of the test wiring and improving the test efficiency.

[0049] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific embodiment of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A wind turbine generator impedance testing device, characterized in that: The device comprises: a laptop computer and a test device chassis, wherein a real-time control card and an analog digital IO card are integrated in the test device chassis, the laptop computer is communicatively connected to the real-time control card in the test device chassis, and the real-time control card is connected to a wind turbine controller to be tested via the analog digital IO card; the laptop computer comprises a scanning control module, a circuit modeling module and an impedance analysis module; the real-time control card comprises a test signal generator, a digital circuit model and an oscilloscope, the digital circuit model is respectively connected to the test signal generator and the oscilloscope, the scanning control module of the laptop computer is connected to the test signal generator, the circuit modeling module is connected to the digital circuit model, and the impedance analysis module is connected to the oscilloscope.

2. The wind turbine generator impedance testing device according to claim 1, characterized in that: The notebook computer and the real-time control card are connected via an Ethernet cable, and data communication between each module in the notebook computer and each part in the real-time control card is achieved through different ports using the TCP / IP protocol.

3. The wind turbine generator impedance testing device according to claim 1, characterized in that: The analog digital IO card comprises a digital analog output circuit and a digital analog input circuit, and the digital analog output circuit and the digital analog input circuit are respectively connected to the wind turbine controller to be tested, and are respectively connected to the digital circuit model.

4. The wind turbine generator impedance testing device according to claim 1, characterized in that: The analog quantities between the analog digital IO card and the wind turbine controller to be tested are connected via a multi-channel SPI bus, each analog quantity occupies one SPI data channel, and the analog quantities share a clock and a chip select signal.

5. The wind turbine generator impedance testing device according to claim 1, characterized in that: The analog digital IO card is connected to the fan controller to be tested via ±10V analog voltage signals and 24V digital IO signals.

6. The wind turbine generator impedance testing device according to claim 1, characterized in that: The test device chassis adopts a 1U 19-inch chassis, the real-time control card adopts an sbRIO-9608 single-board controller configured with an XC7A200T FPGA chip and an Intel E3805 processor, and the analog digital IO card is configured with 24 16-bit, 250ksps digital-to-analog converters and 12 16-bit, 250ksps analog-to-digital converters, 24 5-24V switching input circuits, and 24 5-24V switching output circuits.

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