Active testing device for primary frequency regulation of thermal power units

Abstract

This utility model relates to a device for active testing of primary frequency regulation in thermal power units, including a dispatch data network capable of data transmission, a synchronization vector measurement unit, an online testing and assessment substation for primary frequency regulation in power plants, and a primary frequency regulation testing terminal for the unit. The primary frequency regulation testing terminal includes a housing and a testing body disposed inside the housing. Heat dissipation vents are provided on both sides of the housing. A sealing plate, which contacts and seals the sides of the heat dissipation vents, is elastically connected inside each vent. Two support feet are elastically inserted into the sealing plate. The sealing plate can be pressed to lock or unlock within the heat dissipation vents. A cooling fan communicating with the interior of the housing is fixed at the bottom of the housing. A proximity switch is provided at each heat dissipation vent, and the proximity switch controls the operation of the cooling fan based on the position of the sealing plate. This utility model has the advantage of ensuring heat dissipation.

Description

Technical Field

[0001] This utility model belongs to the field of power testing technology, specifically relating to a device for active testing of primary frequency regulation function of thermal power units. Background Technology

[0002] Thermal power units are the main power generation equipment in the power system, and their operational stability is crucial to the safety of the power grid and the quality of power. Primary frequency regulation refers to the process by which thermal power units automatically adjust their power generation capacity according to changes in the grid frequency during operation to maintain grid frequency stability. This process plays an important role in ensuring the reliable operation of the power system, and the primary frequency regulation active testing device is used to detect and verify whether the performance of thermal power units during the primary frequency regulation process meets the requirements of the power grid.

[0003] Currently, Chinese patent CN219475731U discloses a primary frequency modulation function testing device, including a support assembly, comprising a testing device body, a connector, a limiting member, a fixing rod, and a connecting rod. The connector is disposed on both sides of the testing device body, the limiting member is disposed within the connector, the fixing rod is fixed to the connector, and the connecting rod is fixed between the two fixing rods. In use, the support assembly provides support for the device and makes it easier to change the support angle. However, primary frequency modulation testing devices typically require heat dissipation during use, so heat dissipation is achieved through heat dissipation vents. When not in use, the presence of these vents causes dust to accumulate on the internal components, potentially leading to overheating during operation. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a device for active testing of primary frequency regulation of thermal power units that ensures heat dissipation.

[0005] The technical solution of this utility model is as follows:

[0006] The device for active testing of primary frequency regulation of thermal power units includes a dispatch data network capable of data transmission, a synchronization vector measurement unit, an online testing and assessment substation for primary frequency regulation of the power plant, and a primary frequency regulation testing terminal for the unit. The primary frequency regulation testing terminal for the unit includes a housing and a testing body disposed inside the housing. The housing has heat dissipation vents on both sides. A sealing plate that contacts and seals the side of the heat dissipation vent is elastically connected inside the heat dissipation vent. Two support feet are elastically inserted into the sealing plate. The sealing plate can be pressed to lock or unlock inside the heat dissipation vent.

[0007] A cooling fan communicating with the interior of the housing is fixed at the bottom of the housing, and a proximity switch is provided at the heat dissipation port. The proximity switch controls the operation of the cooling fan based on the position of the enclosed plate.

[0008] Furthermore, a filter screen is provided inside the heat dissipation vent, the filter screen is provided with a first pressing female buckle, the sealing plate is provided with a first pressing male buckle corresponding to the left and right positions of the first pressing female buckle, and the proximity switch is fixed to the filter screen.

[0009] Furthermore, multiple spring telescopic rods are fixed at each of the heat dissipation vents, and the spring telescopic rods pass through the filter screen and are fixed to the sealing plate.

[0010] Furthermore, two sliding grooves are vertically formed inside the closed plate. A second pressing nut is fixed at the top of the sliding groove. A sliding block is slidably connected to the sliding groove. The sliding block is provided with a second pressing nut that can be inserted into the second pressing nut. A support spring is fixed to the top of the sliding groove and the support foot passes through the closed plate and is rotatably connected to the sliding block.

[0011] Furthermore, the top of the support foot is provided with a threaded part, and the closed plate has a threaded hole communicating with the sliding groove, and the threaded part can be threadedly connected to the threaded hole.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model uses a sealing plate to seal the heat dissipation vents, preventing dust from entering the housing when not in use and affecting the normal use of the test subject. The cooling fan works in conjunction with the proximity switch so that the cooling fan will only work after the sealing plate is opened, thus ensuring the heat dissipation effect.

[0014] 2. This utility model achieves the fixation of the support foot through the cooperation of the threaded part and the threaded hole, thus ensuring support;

[0015] In summary, this invention has the advantage of ensuring heat dissipation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This utility model Figure 1 A schematic diagram of the primary frequency regulation test terminal of the unit;

[0018] Figure 3 This utility model Figure 2 A schematic diagram of the substation's structure viewed from below;

[0019] Figure 4 This utility model Figure 3A schematic diagram of the connection structure between the support leg and the enclosure plate;

[0020] Figure 5 This utility model Figure 3 A schematic diagram of the AA cross-sectional structure.

[0021] In the diagram, 1. Housing, 2. Proximity switch, 3. First pressing female buckle, 4. Support foot, 5. Enclosure plate, 6. Spring telescopic rod, 7. First pressing male buckle, 8. Cooling fan, 9. Second pressing female buckle, 10. Sliding block, 11. Threaded part, 12. Second pressing male buckle, 13. Test body, 14. Filter screen. Detailed Implementation

[0022] 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.

[0023] like Figure 1-5 As shown, the active testing device for primary frequency regulation of thermal power units includes a dispatch data network capable of data transmission, a synchronization vector measurement unit, an online testing and assessment substation for primary frequency regulation of the power plant, and a primary frequency regulation testing terminal for the unit. For the data transmission part, existing technologies such as communication cables and wireless transmission can be used. The primary frequency regulation testing terminal for the unit includes a housing 1 and a test body 13 fixed inside the housing 1. Heat dissipation vents are opened on both sides of the housing 1. A sealing plate 5 is elastically connected inside the heat dissipation vent and is sealed to the side of the heat dissipation vent through a sealing gasket. Two support feet 4 are elastically inserted into the sealing plate 5. The sealing plate 5 can be pressed and locked or unlocked inside the heat dissipation vent.

[0024] A cooling fan 8 that communicates with the interior of the housing 1 is fixed at the bottom of the housing 1. A proximity switch 2 is provided at the heat dissipation port. The proximity switch 2 is connected to the cooling fan 8 through a control circuit and is connected to a power supply so that the proximity switch 2 can control the cooling fan 8 to work based on the position of the closed plate 5.

[0025] During operation, the dispatch data network acquires real-time grid status (load demand, generation plan, fault warning, etc.) and sends control commands via Ethernet to the synchronization vector measurement unit and the power plant's primary frequency regulation online test and assessment substation. The synchronization vector measurement unit then collects high-precision synchronization data such as voltage amplitude, phase angle, and frequency from various grid nodes and feeds it back to the power plant's primary frequency regulation online test and assessment substation. Based on historical data, the substation performs real-time status and safety assessments and issues commands. Subsequently, the unit's primary frequency regulation test terminal sends test commands to the unit's DCS and performs tests on the units within the power plant. During the test, the unit is controlled via the unit's DCS. After the test, the unit's primary frequency regulation test terminal feeds back to the power plant's primary frequency regulation online test and assessment substation. The substation evaluates the results to ensure a rapid and accurate response when needed by the power grid, fulfilling the power grid's function of actively testing the primary frequency regulation of thermal power units. The duty station can transmit data with the power plant's primary frequency regulation online test and assessment substation via data cable or wirelessly to view information in the substation. This part is existing technology, so details will not be elaborated further.

[0026] When the unit's primary frequency regulation test terminal is in use, the personnel press the sealing plate 5. The sealing plate 5 is unlocked by pressing and pops out elastically. At this time, the support foot 4 extends, and the personnel can support themselves through the support foot 4. Since the sealing plate 5 is far away from the proximity switch 2, the proximity switch 2 controls the cooling fan 8 to dissipate heat. At this time, air enters the housing 1 through the heat dissipation port and is discharged from the cooling fan 8 to ensure heat dissipation.

[0027] When not in use, the support foot 4 is pushed into the closed plate 5 and the closed plate 5 is pressed into the heat dissipation port, so that the closed plate 5 and the heat dissipation port are pressed and locked. At this time, the proximity switch 2 controls the cooling fan 8 to turn off.

[0028] The proximity switch 2 can also be replaced with other distance detection instruments, such as a range sensor.

[0029] In this embodiment, a filter screen 14 is fixed inside the heat dissipation vent, a first pressing female buckle 3 is fixed to the filter screen 14, a first pressing male buckle 7 corresponding to the left and right positions of the first pressing female buckle 3 is fixed to the sealing plate 5, and a proximity switch 2 is fixed to the filter screen 14.

[0030] In use, the first pressing female buckle 3 and the first pressing male buckle 7 are used to press and lock the closed plate 5, and the filter screen 14 is used to filter the air to prevent dust from entering the inside of the housing 1 and ensure its use.

[0031] In this embodiment, multiple spring telescopic rods 6 are fixed at each heat dissipation vent. The spring telescopic rods 6 pass through the filter screen 14 and are fixed to the sealing plate 5. The spring telescopic rods 6 realize the elastic connection between the sealing plate 5 and the housing 1, ensuring elastic reset.

[0032] In this embodiment, two sliding grooves are vertically opened inside the closed plate 5. A second pressing nut 9 is fixed at the top of the sliding groove. A sliding block 10 is slidably connected to the sliding groove. A second pressing nut 12 that can be inserted into the second pressing nut 9 is fixed to the sliding block 10. A support spring that is fixed to the top of the sliding groove is fixed to the sliding block 10. The support foot 4 passes through the closed plate 5 and is rotatably connected to the sliding block 10 through a bearing.

[0033] When it is necessary to control the extension of the support foot 4, press the support foot 4 to unlock it. At this time, the support spring drives the support foot 4 to extend elastically, thereby supporting the housing 1. When it is necessary to reset, press the support foot 4 to make the sliding block 10 slide along the sliding groove to reset and press and lock it in the sliding groove.

[0034] In this embodiment, the top of the support foot 4 is integrally formed with a threaded part 11, and the closing plate 5 is provided with a threaded hole communicating with the sliding groove. The threaded part 11 can be threadedly connected to the threaded hole.

[0035] During use, the support capacity of the support foot 4 is ensured by the cooperation between the threaded part 11 and the threaded hole.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features; any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for active testing of primary frequency regulation in thermal power units, comprising a dispatch data network capable of data transmission, a synchronization vector measurement unit, an online testing and evaluation substation for primary frequency regulation in power plants, and a primary frequency regulation testing terminal for the unit, characterized in that: The unit's primary frequency regulation test terminal includes a housing and a test body disposed inside the housing. The housing has heat dissipation vents on both sides. A sealing plate that contacts and seals the side of the heat dissipation vent is elastically connected inside the heat dissipation vent. Two support feet are elastically inserted into the sealing plate. The sealing plate can be pressed to lock or unlock inside the heat dissipation vent. A cooling fan communicating with the interior of the housing is fixed at the bottom of the housing, and a proximity switch is provided at the heat dissipation port. The proximity switch controls the operation of the cooling fan based on the position of the enclosed plate.

2. The active frequency regulation testing device for thermal power units according to claim 1, characterized in that: The heat dissipation vent is equipped with a filter screen, the filter screen is equipped with a first pressing female buckle, the sealing plate is equipped with a first pressing male buckle corresponding to the left and right positions of the first pressing female buckle, and the proximity switch is fixed to the filter screen.

3. The active frequency regulation test device for thermal power units according to claim 2, characterized in that: Multiple spring telescopic rods are fixed at each of the heat dissipation vents. The spring telescopic rods pass through the filter screen and are fixed to the sealing plate.

4. The active frequency regulation test device for thermal power units according to claim 3, characterized in that: The enclosed plate has two vertically formed sliding grooves inside. A second pressing nut is fixed at the top of the sliding groove. A sliding block is slidably connected to the sliding groove. The sliding block is provided with a second pressing nut that can be inserted into the second pressing nut. A support spring is fixed to the top of the sliding groove and fixed to the sliding block. The support foot passes through the enclosed plate and is rotatably connected to the sliding block.

5. The active frequency regulation test device for thermal power units according to claim 3, characterized in that: The top of the support foot is provided with a threaded part, and the closed plate has a threaded hole that communicates with the sliding groove. The threaded part can be threadedly connected to the threaded hole.

Images