Modular hydroelectric generator real-time simulation device

Abstract

A modular hydroelectric generating set real-time simulation device, including the machine case, be equipped with two shielding partitions in the machine case, the machine case is divided into the calculation core layer, the isolation layer and the power interface layer from top to bottom by shielding partition, the side of machine case is connected with the auxiliary box, the shielding layer is equipped in the auxiliary box, the hybrid signal board is equipped in the auxiliary box;The main control calculation unit and signal processing board connected with the hybrid signal board are equipped in the calculation core layer;The signal isolation module, analog input module, digital output module and optical fiber communication module connected with the hybrid signal board are installed in the isolation layer;The multiple power modules and power interface components connected with the hybrid signal board are equipped in the power interface layer;The fan is installed on the machine case of each layer side. The utility model is used to solve the problem of insufficient heat dissipation of the existing modular hydroelectric generating set real-time simulation device, and the problem of large occupation area of water cooling heat dissipation is solved.

Description

Technical Field

[0001] This utility model relates to a modular hydropower unit real-time simulation device. Background Technology

[0002] Hydropower unit simulation devices are core equipment for dynamic analysis and controller testing of power systems, and their performance directly determines the safety and economy of hydropower station operation. Hydropower unit simulation devices must meet technical specifications such as microsecond-level time synchronization, kilowatt-level power interfaces, and continuous operating temperature below 85℃. The shortcomings of mainstream real-time simulation equipment for hydropower units include: First, a certain real-time simulation chassis for hydropower units uses a 19-inch standard rack and a top-exhaust cooling design. Although it integrates the main control board, signal acquisition board, and power output board, it suffers from localized hotspot concentration, lack of signal interface isolation, and excessive switching noise. Second, integrated devices, due to the shared board layout of the main control unit and power interface, suffer from large fluctuations in signal transmission delay and insufficient heat dissipation of the power modules. Third, distributed architecture devices, represented by the ABB RT-Lab series, although improving some performance through the separation of computing units and I / O units and water cooling, suffer from drawbacks such as large footprint, complex water cooling system maintenance, and limited bandwidth between modules, all of which fail to meet high-standard application requirements. Utility Model Content

[0003] The purpose of this invention is to provide a modular hydropower unit real-time simulation device to solve the problems of insufficient heat dissipation and large footprint of existing modular hydropower unit real-time simulation devices that use water cooling.

[0004] To solve the above problems, the technical solution of this utility model is as follows: A modular real-time simulation device for hydropower units includes a chassis with two shielding partitions dividing it into a computing core layer, an isolation layer, and a power interface layer from top to bottom. A sub-chamber is connected to one side of the chassis, containing a shielding layer and a mixed signal board. The computing core layer houses a main control computing unit and a signal processing board connected to the mixed signal board. The isolation layer contains a signal isolation module, an analog input module, a digital output module, and a fiber optic communication module connected to the mixed signal board. The power interface layer contains multiple power modules and power interface components connected to the mixed signal board. Fans are installed on one side of the chassis for each layer.

[0005] Furthermore, a ventilation gap is provided between one end of the partition and the inner wall of the chassis, and through holes corresponding to the gap are provided at the top and bottom ends of the chassis.

[0006] Furthermore, the mixed signal board is divided into a digital signal area, an analog signal area, and a power interface area; the digital signal area, analog signal area, and power interface area are sequentially connected to the isolation layer, the computing core layer, and the power interface layer.

[0007] Furthermore, the digital signal area adopts an LVDS differential signal transmission structure, and the wiring is of equal length.

[0008] Furthermore, the analog signal area adopts a double-layer shielded wiring structure and is equipped with a star-shaped grounding bridge and a power isolation strip.

[0009] Furthermore, a connecting cover is provided on one side of the chassis, with each fan located inside the cover, and a filter screen is fixedly connected to one side of the cover.

[0010] Furthermore, two inclined air guide plates are installed on both sides of the fan outlet.

[0011] The beneficial effects of this utility model are as follows: the simulation device is divided into layers according to different functions and each layer is cooled by air. The computing core layer and power interface layer, which generate a lot of heat, are placed at the top and bottom of the chassis, while the isolation layer, which generates less heat, is placed in the middle. Both layers are equipped with fans to assist in heat dissipation, so that the two heat sources do not affect each other. At the same time, the signals are shielded and isolated. In addition, a separate auxiliary box is set up to install the mixed signal board and connect the layers. This not only facilitates operation but also prevents the heat generated from affecting the computing core layer and power interface layer. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of this utility model. Figure 2 This is the left view of the present invention.

[0013] In the diagram: 1. Chassis; 2. Air guide plate; 3. Shielding partition; 4. Signal processing board; 5. Main control computing unit; 6. Analog input module; 7. Computing core layer; 8. Digital output module; 9. Fiber optic communication module; 10. Mixed signal board; 11. Sub-chassis; 12. Cable; 13. Power module; 14. Power interface assembly; 15. Plug; 16. Power interface layer; 17. Isolation layer; 18. Signal isolation module; 19. Filter fixing frame; 20. Filter; 21. Fan; 22. Connecting cover. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] A modular hydropower unit real-time simulation device includes a chassis 1. Two shielding partitions 3 are installed inside the chassis 1, dividing it from top to bottom into a computing core layer 7, an isolation layer 17, and a power interface layer 16. A sub-chamber 11 is connected to one side of the chassis 1, and a hybrid signal board 10 is installed inside the sub-chamber 11. The computing core layer 7 contains a main control computing unit 5 and a signal processing board 4 connected to the hybrid signal board 10. The isolation layer 17 houses a signal isolation module 18, an analog input module 6, a digital output module 8, and an optical fiber communication module 9, all connected to the hybrid signal board 10. The power interface layer 16 contains multiple power modules 13 and power interface components 14 connected to the hybrid signal board 10. A fan 21 is installed on one side of the chassis 1 for each layer. The shielding layer of the auxiliary box is a metal shielding mesh structure, which wraps around the outside of the mixed signal board. It can effectively isolate the interference of electromagnetic signals outside the auxiliary box to the mixed signal board, and at the same time prevent the signal of the mixed signal board from radiating outward. The cable 12 is used for auxiliary signal transmission between modules, and the filter fixing frame 19 is used to fix the filter 20 to ensure the stability of the filter installation.

[0016] Inside chassis 1, two shielding partitions 3 separate the computing core layer 7, isolation layer 17, and power interface layer 16 from top to bottom. A shielded secondary chassis 11 on one side of chassis 1 houses a mixed signal board 10, which connects the main control computing unit 5 of the computing core layer 7 to the signal processing board, the signal isolation module 18 / analog input module 6 / digital output module 8 / fiber optic communication module 9 of the isolation layer 17, and multiple power modules 13 and power interface components 14 of the power interface layer 16. Fans 21 are also installed on the side of each layer of chassis 1 to cool the high-heat computing core. The core layer 7 and power interface layer 16 are located at the top and bottom of the chassis 1, respectively, while the low-heat isolation layer 17 is in the middle. The layered air cooling replaces the traditional water cooling, which avoids the disadvantages of water cooling such as large footprint and complex maintenance. It also improves heat dissipation efficiency by separating the heat source to meet the industry standard of continuous operation below 85℃. At the same time, the shielding partition 3 and the shielding layer of the auxiliary box 11 achieve dual electromagnetic protection, which solves the problems of signal crosstalk and high switching noise of traditional equipment. The layered modular layout also breaks the limitation of the integrated device's main control and power being on the same board, and can flexibly adapt to the testing needs of hydropower units of different capacities.

[0017] Furthermore, a ventilation gap is provided between one end of the partition and the inner wall of the chassis 1, and through holes corresponding to the gap are opened at the top and bottom ends of the chassis 1. This forms a longitudinal airflow supplement channel of "top and bottom through holes of chassis 1 - ventilation gap of partition - internal space of the layer" and forms a coordinated airflow loop with the fans 21 of each layer. This makes up for the lack of local heat dissipation of a single fan 21, realizes airflow circulation between layers and within layers, enhances the overall heat dissipation circulation efficiency, balances the temperature of each layer, eliminates local hot spots in traditional devices, and ensures the overall temperature stability of the device.

[0018] Furthermore, the mixed signal board 10 is divided into a digital signal area, an analog signal area, and a power interface area; the digital signal area, analog signal area, and power interface area are sequentially connected to the isolation layer 17, the computing core layer 7, and the power interface layer 16. This design achieves partitioned transmission of different types of signals to avoid crosstalk. It completes the classification and isolation of digital, analog, and power signals, solving the crosstalk problem caused by the mixed transmission of multiple signal types in traditional equipment, significantly improving the electromagnetic compatibility of the device. At the same time, the clear partitioned connection links simplify signal management and facilitate the maintenance and replacement of modules in the future.

[0019] Furthermore, the digital signal area adopts an LVDS differential signal transmission structure, and the wiring is of equal length. The digital signal area of ​​the hybrid signal board 10 uses an LVDS differential signal transmission structure to cancel common-mode noise during transmission. Simultaneously, equal-length control is implemented on the digital signal wiring to ensure consistent transmission delays for multiple signals. This structure effectively resists external electromagnetic interference, solves the problem of degraded digital signal-to-noise ratio in traditional devices, and the equal-length wiring eliminates signal delay differences, meeting the microsecond-level time synchronization requirements of the IEC61850-7-420 standard, thus overcoming the large delay fluctuations of existing equipment. Furthermore, the analog signal area adopts a double-layer shielded wiring structure to block external electromagnetic interference, and is equipped with a star-shaped grounding bridge and a power isolation strip to isolate power circuit interference, forming triple anti-interference protection. This protection design significantly reduces the transmission loss and noise of analog signals, solves the problem of analog signal degradation in traditional equipment, and ensures the accuracy of the signals collected under the operating conditions of the hydropower unit. At the same time, star grounding and power isolation enhance the stability of signal transmission, allowing analog signals to be transmitted stably in complex electromagnetic environments.

[0020] Furthermore, a connecting cover 22 is provided on one side of the chassis 1, and each fan 21 is located inside the cover 22. A filter 20 is fixedly connected to one side of the cover 22. At the same time, a filter 20 is installed on the outside of the cover 22 to intercept dust and impurities in the air. This configuration can prevent dust from clogging the air ducts of the fans 21 or the heat sinks of the covered components, ensuring the long-term reliability of the heat dissipation system and extending the service life of the device. Moreover, the cover 22 integrates the dispersed fans 21 to form a unified heat dissipation unit, making the airflow more concentrated, improving the overall efficiency of air cooling and reducing the operating noise of the fans 21.

[0021] Furthermore, two inclined air guide plates 2 are provided on both sides of the fan 21 outlet. The airflow of the fan 21 is guided by the inclination of the air guide plates 2 to flow precisely to high-heat components such as the main control computing unit 5 of the computing core layer 7 and the power module 13 of the power interface layer 16, so as to achieve directional and precise heat dissipation. This air guide design changes the diffusion path of the traditional heat dissipation airflow, improves the targeting of heat dissipation, and can quickly remove the heat from the high-heat components and conduct it out of the chassis 1. This not only solves the problem of local hot spots in traditional devices, but also further reduces the overall temperature rise of the device, ensuring that the device can still operate stably under high load conditions.

[0022] The embodiments described in this specification are merely examples of implementations of the inventive concept. The scope of protection of this utility model should not be considered as limited to the specific forms described in the embodiments. The scope of protection of this utility model also extends to equivalent technical means that can be conceived by those skilled in the art based on the inventive concept.

Claims

1. A modular hydropower unit real-time simulation device, characterized in that: The system includes a chassis with two shielding partitions that divide the chassis into a computing core layer, an isolation layer, and a power interface layer from top to bottom. A secondary chassis is connected to one side of the chassis, housing a mixed-signal board. The computing core layer contains a main control computing unit and a signal processing board connected to the mixed-signal board. The isolation layer houses signal isolation modules, analog input modules, digital output modules, and fiber optic communication modules connected to the mixed-signal board. The power interface layer contains multiple power modules and power interface components connected to the mixed-signal board. Fans are installed on one side of each layer of the chassis.

2. The modular hydropower unit real-time simulation device according to claim 1, characterized in that: A ventilation gap is provided between one end of the partition and the inner wall of the chassis, and through holes corresponding to the gap are opened at the top and bottom of the chassis.

3. The modular hydropower unit real-time simulation device according to claim 1, characterized in that: The mixed signal board is divided into a digital signal area, an analog signal area, and a power interface area; the digital signal area, analog signal area, and power interface area are connected to the isolation layer, the computing core layer, and the power interface layer respectively.

4. The modular hydropower unit real-time simulation device according to claim 3, characterized in that: The digital signal area adopts an LVDS differential signal transmission structure, and the wiring is of equal length.

5. The modular hydropower unit real-time simulation device according to claim 3, characterized in that: The analog signal area adopts a double-layer shielded wiring structure and is equipped with a star grounding bridge and a power isolation strip.

6. A modular hydropower unit real-time simulation device according to any one of claims 1 to 4, characterized in that: A connecting cover is provided on one side of the chassis, and each fan is located inside the cover. A filter screen is fixedly connected to one side of the cover.

7. A modular hydropower unit real-time simulation device according to any one of claims 1 to 4, characterized in that: Two inclined air guide plates are installed on both sides of the fan outlet.

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