Ultrahigh-voltage directly-hung phase modifier

Abstract

The utility model discloses an ultrahigh-pressure directly-hung phase modifier, which comprises a phase modifier body, an air cooling device and a moisture filtering device, and is characterized in that the phase modifier body is provided with a casing, stator back iron, a stator body and a rotor; a first mounting end and a second mounting end are detachably mounted at the two ends of the shell respectively, and the two ends of the rotor are rotationally mounted at the first mounting end and the second mounting end and extend to the outside respectively to be provided with an air supply fan and a cooling fan; an air inlet of the first mounting end is connected with an air cooling device through a moisture filtering device, and an air outlet cover is mounted at the second mounting end; the stator body comprises a stator core and a winding, the stator core is made of non-magnetic teeth, and the winding is made of cables. According to the utility model, non-magnetic teeth and cable materials are adopted, magnetic saturation of tooth parts is avoided, eddy current loss is reduced, the thickness of an insulating layer of the cable is uniform, the quality is stable, the stability of the phase modifier is enhanced, and the problem of heating of the phase modifier is solved by cooling through the air cooling device.

Description

Technical Field

[0001] The utility model relates to the technical field of synchronous condensers, in particular to an extra-high voltage directly hung synchronous condenser. Background Technique

[0002] With the continuous development of the power system, the requirements for reactive power compensation and voltage stability are getting higher and higher. The extra-high voltage directly hung synchronous condenser plays a key role in the power grid.

[0003] In the prior art, the invention authorization patent with the patent number CN201811011594.0 discloses a synchronous condenser rotor, including: a plurality of rotor units, each rotor unit includes an iron core, an exciting winding and a shaft member; the iron core includes an iron core body and a plurality of magnetic poles, and the plurality of magnetic poles are symmetrically arranged on the side wall of the iron core body; the exciting windings are wound around the plurality of magnetic poles; shaft members are respectively arranged at both axial ends of the iron core body; and the plurality of rotor units are connected by a coupling member. This synchronous condenser rotor solves the technical problems that the iron core of the large synchronous condenser rotor is integrally slender, difficult to manufacture, costly, and the rotor is heavy, and the service life of the shaft supporting its weight is short.

[0004] The above patent provides a synchronous condenser that realizes reactive power compensation and voltage stability in the power grid. By replacing the original slender rotor with a connection of multiple shorter rotor units, on the basis of meeting the centrifugal force requirements, the iron core manufacturing of the rotor unit is much simpler than that of the original slender integral iron core of the rotor. However, this synchronous condenser lacks improvement in the stator. The traditional stator structure is composed of a stator iron core and a copper wire winding. As the voltage level increases, a large amount of eddy current loss will be generated inside, resulting in serious heating of the synchronous condenser and increased copper loss, which needs to be further improved. Content of the Utility Model

[0005] The purpose of the utility model is to provide an extra-high voltage directly hung synchronous condenser, aiming to improve the problem that the stator structure of the existing synchronous condenser is composed of a stator iron core and a copper wire winding. As the voltage level increases, a large amount of eddy current loss will be generated inside, resulting in serious heating of the synchronous condenser and increased copper loss.

[0006] The present utility model is implemented as follows: A super-high voltage direct-hanging synchronous condenser includes a synchronous condenser body, and the synchronous condenser body is sequentially provided with a casing, a stator back iron, a stator body, and a rotor from outside to inside, and further includes an air cooling device and a moisture filtering device; both ends of the casing are detachably installed with a first installation end and a second installation end respectively, both ends of the rotor are rotatably installed on the first installation end and the second installation end, and are respectively extended to the outside to install a blower fan and a heat dissipation fan; the air inlet of the first installation end is connected with the air cooling device through the moisture filtering device, and an air outlet cover is installed at the air outlet of the second installation end; the stator body includes a stator core and windings, the material of the stator core is non-magnetic teeth, and the material of the windings is cables.

[0007] Preferably, the air cooling device includes a cooling housing, a cooling disk, a circulation pump, and a coolant tank, and the cooling disk, the circulation pump, and the coolant tank are circularly connected through pipelines; the cooling disk is fixedly arranged inside the cooling housing, one end of the cooling housing is provided with a filter screen, and the other end is installed on the air inlet of the first installation end through the moisture filtering device.

[0008] Preferably, the cooling disk includes a liquid outlet main pipe and a liquid inlet main pipe, and a plurality of layers of curved pipe disks are sequentially arranged along the length direction between the liquid outlet main pipe and the liquid inlet main pipe.

[0009] Preferably, it further includes heat dissipation plates, and a plurality of heat dissipation plates are sequentially arranged at intervals along the circumferential direction on the inner circumferential surfaces of the casing, the first installation end, and the second installation end, and the heat dissipation plates inside the casing, the first installation end, and the second installation end are correspondingly connected in communication; the outer circumferential surface of the stator back iron is clamped on the inner end surface of the heat dissipation plate inside the casing.

[0010] Preferably, it further includes an installation structure, and the installation structure includes a first installation ear, a second installation ear, and installation bolts; a plurality of first installation ears are fixedly arranged along the circumferential direction at both ends of the casing, the positions of the second installation ears corresponding to the first installation ears are arranged at one end of the first installation end and the second installation end close to the casing, and the first installation ear and the second installation ear are tightly connected through the installation bolts.

[0011] Preferably, the rotor includes a first installation shaft section, a second installation shaft section, and a third installation shaft section, and the first installation shaft section, the second installation shaft section, and the third installation shaft section are sequentially arranged outward at both ends of the rotor; first installation holes and second installation holes are respectively fixedly arranged at the central positions of the first installation end and the second installation end, bearings are respectively embedded inside the first installation holes and the second installation holes, and the second installation shaft sections at both ends of the rotor are respectively inserted into the corresponding bearings; the blower fan and the heat dissipation fan are respectively installed on the third installation shaft sections of the rotor.

[0012] Preferably, the diameters of the first-stage mounting shaft, the second-stage mounting shaft, and the third-stage mounting shaft gradually decrease, and the end face of the third-stage mounting shaft abuts against the side surface of the bearing.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. By using non-magnetic teeth to make the stator core and cables to make the windings, the present utility model can avoid tooth magnetic saturation, reduce eddy current loss, and utilize the advantages of the uniform thickness and stable quality of the insulating layer of the cables to enhance the stability of the synchronous condenser, reduce heat generation, and then cool its interior through the air cooling device, solving the problem of serious overheating of the existing synchronous condenser.

[0015] 2. The present utility model can blow air into the synchronous condenser through the air supply fan, and the heat dissipation fan can quickly discharge the hot air inside the synchronous condenser. By accelerating the air flow speed inside at both ends simultaneously, the heat inside can be driven in time, improving the heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0017] Figure 2 is a sectional structural schematic diagram of the whole of the present utility model;

[0018] Figure 3 is a structural schematic diagram of the air cooling device of the present utility model;

[0019] Figure 4 is a structural schematic diagram of the casing of the present utility model;

[0020] Figure 5 is a structural schematic diagram of the stator body of the present utility model;

[0021] Figure 6 is a structural schematic diagram of the rotor of the present utility model;

[0022] Figure 7 is a mounting structural schematic diagram of the first mounting end, the second mounting end, and the rotor of the present utility model.

[0023] In the figure: 1. Air cooling device; 101. Cooling housing; 102. Cooling plate; 103. Circulation pump; 104. Coolant tank; 105. Main liquid outlet pipe; 106. Main liquid inlet pipe; 107. Filter screen; 2. Moisture filtering device; 3. Synchronous condenser body; 4. Housing; 5. Stator back iron; 6. Stator body; 601. Stator core; 602. Winding; 7. Rotor; 701. First mounting shaft; 702. Second mounting shaft; 703. Third mounting shaft; 8. First mounting end; 801. First mounting hole; 9. Second mounting end; 901. Second mounting hole; 10. Air outlet cover; 11. Air supply fan; 12. Cooling fan; 13. Heat dissipation plate; 14. Mounting structure; 1401. First mounting ear; 1402. Second mounting ear; 1403. Mounting bolt; 15. Bearing. Detailed implementation mode

[0024] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "fixation", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0025] The following will be further described in conjunction with the drawings and specific embodiments:

[0026] Embodiment 1

[0027] As shown in Figure 1 , Figure 2 , Figure 6 and Figure 7 , a super-high voltage directly hung synchronous condenser includes a synchronous condenser body 3. From the outside to the inside, the synchronous condenser body 3 is successively provided with a housing 4, a stator back iron 5, a stator body 6 and a rotor 7, and also includes an air cooling device 1 and a moisture filtering device 2. The two ends of the housing 4 are respectively detachably installed with a first mounting end 8 and a second mounting end 9, and also includes a mounting structure 14. The mounting structure 14 includes a first mounting ear 1401, a second mounting ear 1402 and a mounting bolt 1403. A plurality of first mounting ears 1401 are fixedly arranged along the circumferential direction at both ends of the housing 4. Second mounting ears 1402 are arranged at the positions corresponding to the first mounting ears 1401 at one end of the first mounting end 8 and the second mounting end 9 close to the housing 4. The first mounting ear 1401 and the second mounting ear 1402 are tightly connected by a mounting bolt 1403. By dividing the outer shell of the synchronous condenser into three structures, it is convenient to disassemble and assemble the internal structure of the synchronous condenser, which is convenient for subsequent maintenance.

[0028] Both ends of the rotor 7 are rotatably mounted on the first mounting end 8 and the second mounting end 9, and respectively extend to the outside where a blowing fan 11 and a heat dissipation fan 12 are installed. By providing the blowing fan 11, air can be blown into the synchronous condenser body 3, and the heat dissipation fan 12 can quickly discharge the hot air inside the synchronous condenser body 3. By accelerating the air flow speed inside at both ends simultaneously, the heat inside can be driven in time. The rotor 7 includes a first mounting shaft 701, a second mounting shaft 702, and a third mounting shaft 703. The two ends of the rotor 7 are successively provided with the first mounting shaft 701, the second mounting shaft 702, and the third mounting shaft 703 outward. First mounting holes 801 and second mounting holes 901 are respectively fixedly provided at the central positions of the first mounting end 8 and the second mounting end 9. Bearings 15 are respectively embedded inside the first mounting holes 801 and the second mounting holes 901. The second mounting shafts 702 at both ends of the rotor 7 are respectively inserted into the corresponding bearings. By rotatably mounting the two ends of the rotor 7 in the bearings 15, the rotor 7 can rotate smoothly and prevent it from getting stuck.

[0029] The blowing fan 11 and the heat dissipation fan 12 are respectively mounted on the third mounting shaft 703 of the rotor 7. The diameters of the first mounting shaft 701, the second mounting shaft 702, and the third mounting shaft 703 gradually decrease. The end face of the third mounting shaft 703 abuts against the side surface of the bearing 15. By dividing the mounting shaft of the rotor 7 into three structures with different diameters, it is convenient to insert the mounting shaft into the bearing from thin to thick during the installation process, and at the same time, the assembly structures on each corresponding mounting shaft can be limited by the difference between the different diameters.

[0030] As Figures 2 - 5 shown, in addition, a heat dissipation plate 13 is further included. A plurality of heat dissipation plates 13 are successively arranged at intervals along the circumferential direction on the inner circumferential surfaces of the machine shell 4, the first mounting end 8, and the second mounting end 9. The heat dissipation plates 13 inside the machine shell 4, the first mounting end 8, and the second mounting end 9 are correspondingly and communicatively arranged. The outer ring surface of the stator back iron 5 is clamped on the inner end surface of the heat dissipation plate 13 inside the machine shell 4. By providing the heat dissipation plate 13, there can be enough air flow space between the machine shell 4 and the stator back iron 5. At the same time, the contact surface between the equipment inside and the air is enlarged through the heat dissipation plate 13, so that more heat can be taken away by the air flow.

[0031] The air inlet of the first installation end 8 is connected to an air cooling device 1 through a moisture filtering device 2. An absorbent filter plate is provided in the moisture filtering device 2 to filter the water vapor condensed and cooled inside the air cooling device 1 from the cold air, preventing the moisture in the cold air from damaging the internal structure of the synchronous condenser body 3. The air cooling device 1 includes a cooling housing 101, a cooling plate 102, a circulation pump 103, and a coolant tank 104. The cooling plate 102, the circulation pump 103, and the coolant tank 104 are connected in a circulating manner through pipelines. The cooling water circulating in the cooling plate 102 cools the air passing through the cooling plate 102 into cold air, and then it can be sent to the inside of the synchronous condenser body 3 through a blower fan 11 for cooling.

[0032] The cooling plate 102 includes a liquid outlet main pipe 105 and a liquid inlet main pipe 106. A plurality of layers of curved pipe plates are sequentially arranged along the length direction between the liquid outlet main pipe 105 and the liquid inlet main pipe 106. The cooling plate 102 is fixedly arranged inside the cooling housing 101. A filter net 107 is provided at one end of the cooling housing 101, and the other end is installed on the air inlet of the first installation end 8 through the moisture filtering device 2. An air outlet cover 10 is installed at the air outlet of the second installation end 9. The stator body 6 includes a stator core 601 and a winding 602. The material of the stator core 601 is non-magnetic teeth, and the material of the winding 602 is a cable. The non-magnetic tooth material replaces the original tooth part, avoiding tooth saturation and greatly reducing the influence of eddy current loss in the tooth part, thereby improving the cooling performance of the motor. Through the cable winding, the advantages of uniform insulation layer thickness and stable quality can be utilized, and it can withstand a high electric field strength, effectively preventing insulation breakdown between the inside of the winding and between the winding and the iron core, reducing the occurrence of partial discharge phenomena, which is crucial for the operation of the synchronous condenser in an extra-high voltage environment. At the same time, there will be no local overheating, which is beneficial to the rapid dissipation of heat.

[0033] Embodiment 2

[0034] As Figure 1 、 Figure 2 、 Figure 6 and Figure 7As shown in the figure, a directly hung ultra-high voltage synchronous condenser includes a synchronous condenser body 3. From outside to inside, the synchronous condenser body 3 is sequentially provided with a casing 4, a stator back iron 5, a stator body 6, and a rotor 7. It also includes an air cooling device 1 and a moisture filtering device 2. Both ends of the casing 4 are detachably installed with a first mounting end 8 and a second mounting end 9 respectively. It also includes a mounting structure 14, which includes a first mounting ear 1401, a second mounting ear 1402, and a mounting bolt 1403. A plurality of first mounting ears 1401 are fixedly arranged along the circumferential direction at both ends of the casing 4. At the positions corresponding to the first mounting ears 1401, second mounting ears 1402 are provided at one end of the first mounting end 8 and the second mounting end 9 close to the casing 4. The first mounting ear 1401 and the second mounting ear 1402 are fixedly connected by a mounting bolt 1403.

[0035] Both ends of the rotor 7 are rotatably installed on the first mounting end 8 and the second mounting end 9, and are respectively extended to the outside to install a blower fan 11 and a radiator fan 12. The rotor 7 includes a first mounting shaft 701, a second mounting shaft 702, and a third mounting shaft 703. At both ends of the rotor 7, the first mounting shaft 701, the second mounting shaft 702, and the third mounting shaft 703 are sequentially arranged outward. At the central positions of the first mounting end 8 and the second mounting end 9, a first mounting hole 801 and a second mounting hole 901 are respectively fixedly provided. Bearings 15 are embedded inside the first mounting hole 801 and the second mounting hole 901. The second mounting shafts 702 at both ends of the rotor 7 are respectively inserted into the corresponding bearings. The blower fan 11 and the radiator fan 12 are respectively installed on the third mounting shafts 703 of the rotor 7. The diameters of the first mounting shaft 701, the second mounting shaft 702, and the third mounting shaft 703 gradually decrease, and the end face of the third mounting shaft 703 abuts against the side face of the bearing 15.

[0036] As Figures 2 - 5 shown in the figure, it also includes a heat dissipation plate 13. A number of heat dissipation plates 13 are sequentially arranged at intervals along the circumferential direction on the inner circumferential surfaces of the casing 4, the first mounting end 8, and the second mounting end 9. The heat dissipation plates 13 inside the casing 4, the first mounting end 8, and the second mounting end 9 are correspondingly connected in communication. The outer ring surface of the stator back iron 5 is clamped on the inner end surface of the heat dissipation plate 13 inside the casing 4. The air inlet of the first mounting end 8 is connected to the air cooling device 1 through the moisture filtering device 2. The air cooling device 1 includes a cooling housing 101, a cooling plate 102, a circulation pump 103, and a coolant tank 104. The cooling plate 102, the circulation pump 103, and the coolant tank 104 are circulated and connected through pipelines.

[0037] The cooling disk 102 includes a liquid outlet main pipe 105 and a liquid inlet main pipe 106. Along their lengths, multiple layers of curved pipe disks are sequentially arranged between the liquid outlet main pipe 105 and the liquid inlet main pipe 106. The cooling disk 102 is fixedly arranged inside the cooling housing 101. A filter net 107 is arranged at one end of the cooling housing 101, and the other end is installed on the air inlet of the first installation end 8 through the moisture filtering device 2. An air outlet cover 10 is installed at the air outlet of the second installation end 9. The stator body 6 includes a stator core 601 and a winding 602. The material of the stator core 601 is non-magnetic teeth, and the material of the winding 602 is a cable. The non-magnetic tooth material replaces the original tooth part, avoiding tooth magnetic saturation and greatly reducing the influence of eddy current loss in the tooth part, thereby improving the cooling performance of the motor. Through the cable winding, the advantages of uniform insulation layer thickness and stable quality can be utilized, and it can withstand a high electric field strength, effectively preventing insulation breakdown between the inside of the winding and between the winding and the iron core, reducing the occurrence of partial discharge phenomena, which is crucial for the operation of the synchronous condenser in an ultra-high voltage environment. At the same time, there will be no local overheating, which is conducive to the rapid dissipation of heat.

[0038] The working principle of the present utility model: During the operation of the synchronous condenser body 3, the circulating pump 103 is started to drive the cooling water to continuously circulate in the cooling disk 102. Then, during the rotation of the synchronous condenser body 3, the hot air inside the synchronous condenser body 3 is respectively discharged through the heat dissipation fan 12, and the air supply fan 11 sends the external air into the synchronous condenser body 3 after being cooled by the air cooling device 1 to cool its interior, and the moisture in the cold air can be filtered through the moisture filtering device 2. At the same time, during the flow of the air, the contact area with the heat dissipation plate 13 inside the machine shell 4 increases, and more heat can be taken away.

[0039] In summary, by setting the stator core 601 made of non-magnetic teeth and the winding 602 made of a cable, the present utility model can avoid tooth magnetic saturation, reduce eddy current loss, and utilize the advantages of uniform insulation layer thickness and stable quality of the cable to enhance the stability of the synchronous condenser body 3, reduce heat generation, and then cool its interior through the air cooling device 1 to solve the problem of serious overheating of the existing synchronous condenser. Through the air supply fan 11, air can be sent into the synchronous condenser body 3, and the heat dissipation fan 12 can quickly discharge the hot air inside the synchronous condenser body 3. By accelerating the air flow speed inside at both ends simultaneously, the heat inside can be driven in time to improve the heat dissipation efficiency.

[0040] The above is only the preferred embodiment of the present utility model and is not used to limit the present utility model. For those skilled in the art, various changes and modifications can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An ultra-high voltage direct-mounted synchronous condenser, comprising a synchronous condenser body (3), where the synchronous condenser body (3) is sequentially provided with a machine shell (4), a stator back iron (5), a stator body (6), and a rotor (7) from outside to inside, characterized in that, It also includes an air cooling device (1) and a moisture filtering device (2); both ends of the casing (4) are detachably installed with a first mounting end (8) and a second mounting end (9) respectively. Both ends of the rotor (7) are rotatably installed on the first mounting end (8) and the second mounting end (9), and are respectively extended to the outside to install a blowing fan (11) and a heat dissipation fan (12); the air inlet of the first mounting end (8) is connected with the air cooling device (1) through the moisture filtering device (2), and an air outlet cover (10) is installed at the air outlet of the second mounting end (9); the stator body (6) includes a stator core (601) and a winding (602), the material of the stator core (601) is non-magnetic teeth, and the material of the winding (602) is a cable.

2. The ultra-high voltage direct-hanging synchronous condenser according to claim 1, wherein The air cooling device (1) includes a cooling housing (101), a cooling disk (102), a circulation pump (103) and a coolant tank (104). The cooling disk (102), the circulation pump (103) and the coolant tank (104) are circularly communicated through pipelines; the cooling disk (102) is fixedly arranged inside the cooling housing (101), one end of the cooling housing (101) is provided with a filter screen (107), and the other end is installed on the air inlet of the first mounting end (8) through the moisture filtering device (2).

3. The static synchronous compensator of the ultra-high voltage direct-hanging type according to claim 2, characterized in that The cooling disk (102) includes a liquid outlet main pipe (105) and a liquid inlet main pipe (106). Along its length direction, a plurality of layers of curved pipe disks are sequentially arranged between the liquid outlet main pipe (105) and the liquid inlet main pipe (106).

4. The ultra-high voltage directly hung synchronous condenser according to claim 1, characterized in that, In addition, it also includes a heat dissipation plate (13). On the inner circumferential surfaces of the casing (4), the first mounting end (8) and the second mounting end (9), a plurality of heat dissipation plates (13) are sequentially arranged at intervals along the circumferential direction. The heat dissipation plates (13) in the casing (4), the first mounting end (8) and the second mounting end (9) are correspondingly communicated; the outer circumferential surface of the stator back iron (5) is clamped on the inner end surface of the heat dissipation plate (13) inside the casing (4).

5. The static synchronous compensator of the ultra-high voltage direct connection type according to claim 1, characterized in that, In addition, it also includes a mounting structure (14). The mounting structure (14) includes a first mounting ear (1401), a second mounting ear (1402) and a mounting bolt (1403); on both ends of the casing (4), a plurality of first mounting ears (1401) are fixedly arranged in sequence along the circumferential direction. At the positions corresponding to the first mounting ears (1401) at one end of the first mounting end (8) and the second mounting end (9) close to the casing (4), second mounting ears (1402) are provided. The first mounting ear (1401) and the second mounting ear (1402) are fixedly connected through the mounting bolt (1403).

6. The static synchronous compensator directly hung in ultra-high voltage according to claim 1, wherein The rotor (7) includes a first-stage mounting shaft (701), a second-stage mounting shaft (702), and a third-stage mounting shaft (703). At both ends of the rotor (7), the first-stage mounting shaft (701), the second-stage mounting shaft (702), and the third-stage mounting shaft (703) are successively arranged outward; at the central positions of the first mounting end (8) and the second mounting end (9), a first mounting hole (801) and a second mounting hole (901) are respectively fixedly arranged. Bearings (15) are respectively embedded inside the first mounting hole (801) and the second mounting hole (901). The second-stage mounting shafts (702) at both ends of the rotor (7) are respectively inserted into the corresponding bearings; the air supply fan (11) and the heat dissipation fan (12) are respectively mounted on the third-stage mounting shaft (703) of the rotor (7).

7. The static synchronous condenser according to claim 6, wherein The diameters of the first-stage mounting shaft (701), the second-stage mounting shaft (702), and the third-stage mounting shaft (703) gradually decrease, and the end face of the third-stage mounting shaft (703) abuts against the side surface of the bearing (15).

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