Integrated heat treatment device for high-temperature superconducting rotor magnet

Abstract

The invention discloses an integrated heat treatment device for a high-temperature superconducting rotor magnet, and relates to the technical field of superconducting synchronous phase modifiers, the integrated heat treatment device comprises a first double-pancake coil and a second double-pancake coil, a heat dissipation insulation sleeve plate is fixedly connected between the first double-pancake coil and the second double-pancake coil, and an air inlet pipe and an air outlet pipe are fixedly connected to the heat dissipation insulation sleeve plate; the ends, located in the heat dissipation insulation sleeve plate, of the air inlet pipe and the air outlet pipe are communicated through a circulating pipeline. When the temperature monitoring mechanism monitors a local hot spot, the flow dividing pipe on the cold helium inlet side adjacent to the local hot spot, the flow dividing pipe on the cold helium outlet side of the communicating pipe and the flow dividing branch pipe are communicated, at the moment, part of cold helium can bypass the local hot spot along the route facing the communicating pipe, and it is guaranteed that follow-up heat exchange treatment is not affected. According to the invention, the influence of the cold helium with increased temperature on the subsequent heat exchange treatment can be avoided.

Description

Technical Field

[0001] The invention relates to the technical field of superconducting synchronous condenser, and in particular to an integrated heat treatment device for high-temperature superconducting rotor magnets. Background Art

[0002] Synchronous condensers are an important type of dynamic reactive power compensation equipment in power systems, and are widely used in high-voltage direct current transmission and new energy access to the power grid. The rotor excitation coil of a superconducting synchronous condenser is made of superconducting materials. Compared with conventional condensers, it has a larger adjustment range and short-circuit capacity. Since there is no rotor copper loss, the stator and rotor iron losses are also greatly reduced, and its operating efficiency is higher than that of conventional condensers.

[0003] When the load increases, that is, when the reactive power gap in the power grid is large, the rotor excitation current will increase. When the load increases, the excitation current will increase. Therefore, when using a superconducting synchronous condenser, it is also necessary to strongly excite the magnet to achieve a short-term response to compensate for the reactive power of the power grid. Therefore, an insulating layer should be set in the middle of the racetrack-type double-pancake coil of the superconducting synchronous condenser to facilitate strong excitation, and an integrated heat treatment device should also be set to facilitate heat dissipation of the superconducting magnet.

[0004] At present, the purpose of continuous heat dissipation is achieved by passing cold helium gas through the insulating layer in the middle of the double-pancake coil. When a local hot spot appears near the cold helium gas inlet end of the double-pancake coil, the cold helium gas will quickly exchange heat with the local hot spot, causing the temperature of the cold helium gas in the pipeline to rise. During the continuous circulation of cold helium gas, the heat exchange treatment effect of the double-pancake coil far away from the cold helium gas inlet end becomes worse, affecting the overall heat dissipation treatment effect. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a high-temperature superconducting rotor magnet integrated heat treatment device. When the temperature monitoring mechanism detects a local hot spot, the main control valve and the connecting valve of the diverter valve near the local hot spot on the cold helium inlet side are in an open state, and the guide valve, the diverter valve, and the connecting valve away from the local hot spot are in a closed state. The diverter pipe on the cold helium inlet side adjacent to the local hot spot, the diverter pipe on the cold helium outlet side of the connecting pipe, and the diverter branch pipe are connected. At this time, a part of the cold helium can bypass the local hot spot along the route toward the connecting pipe to ensure that the subsequent heat exchange treatment is not affected. The present invention can prevent the cold helium with increased temperature from affecting the subsequent heat exchange treatment.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A high-temperature superconducting rotor magnet integrated heat treatment device, comprising a first double-pancake coil and a second double-pancake coil, a heat dissipation insulating sleeve is fixedly connected between the first double-pancake coil and the second double-pancake coil, an air inlet pipe and an air outlet pipe are fixedly connected to the heat dissipation insulating sleeve, and one end of the air inlet pipe and the air outlet pipe located inside the heat dissipation insulating sleeve is connected through a circulation pipeline;

[0008] A plurality of temperature monitoring mechanisms are fixedly connected to the contact surfaces of the first double-pancake coil, the second double-pancake coil and the heat dissipation insulating sleeve plate, and are used to monitor the generation of local hot spots on the first double-pancake coil and the second double-pancake coil;

[0009] A plurality of diversion mechanisms are evenly arranged on the outer side of the circulation pipeline near the air inlet pipe. When encountering a local hot spot, the input cold helium gas can be divided into two parts, one part is used for heat exchange with the local hot spot, and the other part bypasses the local hot spot for heat exchange in subsequent circulation pipelines.

[0010] Furthermore, each of the diversion mechanisms includes a diversion pipe fixedly connected to the circulation pipeline, each of the diversion pipes is fixedly connected to a diversion valve, one end of the diversion pipe is fixedly connected to a connecting pipe, and one side of the connecting pipe located at the connection between the diversion pipe and the connecting pipe is fixedly connected to a connecting valve.

[0011] Furthermore, a guide branch pipe is fixedly connected to the circulation pipeline, a guide valve is fixedly connected to the guide branch pipe, one end of the guide branch pipe is fixedly connected to an outer guide pipe, and one end of the outer guide pipe is connected to the air outlet pipe.

[0012] Furthermore, a main control valve is fixedly connected to one side of each branch pipe on the circulation pipeline.

[0013] Furthermore, each of the diverter pipes is fixedly connected to a diverter branch pipe, one end of the diverter branch pipe is communicated with the circulation pipeline, and a diverter branch valve is fixedly connected to the diverter branch pipe.

[0014] Furthermore, the outer guide pipe close to the air outlet pipe is fixedly connected to the circulation pipe through a first transverse connecting rod.

[0015] Furthermore, the connecting pipe close to the air outlet pipe is fixedly connected to the circulation pipe through a second transverse connecting rod.

[0016] Furthermore, the guide valve, main control valve, diverter valve, diverter branch valve and connecting valve are all electrically controlled valves.

[0017] Furthermore, a main controller is fixedly connected inside the heat dissipation insulation sleeve, and the main controller is electrically connected to the temperature monitoring mechanism, the guide valve, the main control valve, the diverter valve, the diverter branch valve, and the connecting valve.

[0018] Due to the adoption of the above technical solution, the beneficial effects of the present invention compared with the prior art are as follows:

[0019] 1. When no local hot spot appears, all the main control valves of the present invention are connected, and the diverter valve, diverter valve, diverter branch valve, and connecting valve are all kept closed to maintain the input and circulation of cold helium gas for heat dissipation of the double-cake coil.

[0020] 2. In the present invention, when the temperature monitoring mechanism detects a local hot spot, the main control valve and the connecting valve of the diverter valve close to the local hot spot on the cold helium inlet side are in an open state, and the guide valve, the diverter branch valve, and the connecting valve away from the local hot spot are in a closed state, and the diverter pipe on the cold helium inlet side and the diverter pipe and the diverter branch pipe on the cold helium outlet side of the connecting pipe adjacent to the local hot spot are connected. At this time, a part of the cold helium can bypass the local hot spot along the route toward the connecting pipe to ensure that the subsequent heat exchange treatment is not affected.

[0021] 3. In the present invention, the other part of the cold helium gas with increased temperature after heat exchange with the local hot spot is led out to the gas outlet pipe through the guide branch pipe and the outer guide pipe to avoid the influence of the cold helium gas with increased temperature on the subsequent heat exchange treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a high-temperature superconducting rotor magnet integrated heat treatment device of the present invention;

[0023] Figure 2 It is a schematic diagram of the internal structure of the heat dissipation insulation sleeve of the present invention;

[0024] Figure 3 It is a schematic structural diagram of the interior of the heat dissipation insulation sleeve of the present invention from another angle;

[0025] Figure 4 It is a schematic diagram of the cold helium gas circulation control structure of the present invention;

[0026] Figure 5 For the present invention Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0027] Figure 6 For the present invention Figure 2 Schematic diagram of the enlarged structure at point B in the middle.

[0028] In the figure, the reference numerals are: 1. first double-pancake coil; 2. second double-pancake coil; 3. heat dissipation insulating sleeve; 4. air inlet pipe; 5. air outlet pipe; 6. circulation pipe; 7. outer guide pipe; 8. guide branch pipe; 9. diverter pipe; 10. diverter branch pipe; 11. connecting pipe; 12. first transverse connecting rod; 13. second transverse connecting rod; 14. guide valve; 15. main control valve; 16. diverter valve; 17. diverter branch valve; 18. connecting valve. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in each embodiment of the present invention described below can be combined with each other as long as they do not conflict with each other. The present invention is further described in detail below in conjunction with embodiments:

[0030] like Figure 1-Figure 6 As shown, an embodiment of the present invention provides an integrated heat treatment device for a high-temperature superconducting rotor magnet, comprising a first double-pancake coil 1 and a second double-pancake coil 2, a heat dissipation insulating sleeve 3 is fixedly connected between the first double-pancake coil 1 and the second double-pancake coil 2, the heat dissipation insulating sleeve 3 is made of insulating material, and a plurality of heat exchange fins are installed on the heat dissipation insulating sleeve 3, an air inlet pipe 4 and an air outlet pipe 5 are fixedly connected to the heat dissipation insulating sleeve 3, one end of the air inlet pipe 4 and the air outlet pipe 5 located inside the heat dissipation insulating sleeve 3 is connected through a circulation pipe 6, cold helium gas passes through the air inlet pipe 4 into the circulation pipe 6 inside the heat dissipation insulating sleeve 3 to perform a heat exchange cycle, and the cold helium gas with a higher temperature after the heat cycle is discharged through the air outlet pipe 5, and after being processed, re-enters the heat exchange cycle.

[0031] A plurality of temperature monitoring mechanisms are fixedly connected on the contact surfaces of the first double-pancake coil 1 , the second double-pancake coil 2 and the heat dissipating insulating sleeve 3 . The temperature monitoring mechanisms are devices commonly used in the prior art for real-time temperature monitoring and are used to monitor the generation of local hot spots on the first double-pancake coil 1 , the second double-pancake coil 2 .

[0032] A plurality of diversion mechanisms are evenly arranged on the outer side of the circulation pipe 6 near the air inlet pipe 4. When encountering a local hot spot, the input cold helium can be divided into two parts, one part is used for heat exchange treatment with the local hot spot, and the other part bypasses the local hot spot for subsequent heat exchange treatment in the circulation pipe 6, thereby avoiding the problem that the temperature of the cold helium increases due to the appearance of local hot spots, resulting in poor subsequent heat exchange treatment effects and affecting the overall heat dissipation effect.

[0033] Preferably, each diversion mechanism includes a diversion pipe 9 fixedly connected to the circulation pipeline 6, each diversion pipe 9 is fixedly connected with a diversion valve 16, one end of the diversion pipe 9 is fixedly connected with a connecting pipe 11, and one side of the connecting pipe 11 located at the connection between the diversion pipe 9 and the connecting pipe 11 is fixedly connected with a connecting valve 18. When a local hot spot appears, the diversion pipe 9 on the cold helium gas inlet side adjacent to the local hot spot and the diversion pipe 9 on the cold helium gas outlet side of the connecting pipe 11 are connected. At this time, a part of the cold helium gas can bypass the local hot spot position along the route toward the connecting pipe 11, and the other part continues to be transmitted along the circulation pipeline 6 toward the local hot spot to perform heat exchange treatment with the local hot spot.

[0034] Preferably, a diversion branch pipe 8 is fixedly connected to the circulation pipeline 6, a diversion valve 14 is fixedly connected to the diversion branch pipe 8, one end of the diversion branch pipe 8 is fixedly connected to an outer diversion pipe 7, one end of the outer diversion pipe 7 is connected to the outlet pipe 5, and the cold helium gas with increased temperature after heat exchange treatment with the local hot spot is discharged to the outlet pipe 5 through the diversion branch pipe 8 and the outer diversion pipe 7, so as to avoid the cold helium gas with increased temperature affecting the subsequent heat exchange treatment.

[0035] Preferably, a main control valve 15 is fixedly connected to one side of each branch pipe 9 on the circulation pipeline 6. When no local hot spot occurs, all the main control valves 15 are in an open state, so that the circulation of the cold helium gas in the circulation pipeline 6 is not affected.

[0036] Preferably, each shunt pipe 9 is fixedly connected with a shunt branch pipe 10, one end of the shunt branch pipe 10 is connected with the circulation pipeline 6, and a shunt branch valve 17 is fixedly connected to the shunt branch pipe 10. Through the arrangement of the shunt branch pipe 10, when a local hot spot appears, a part of the cold helium gas can be discharged through the shunt pipe 9 on the cold helium gas inlet side, the connecting pipe 11, the shunt pipe 9 on the cold helium gas outlet side and the shunt branch pipe 10, and the diverted cold helium gas is discharged to the position across the connection between the shunt pipe 9 on the cold helium gas outlet side and the circulation pipeline 6, thereby ensuring that the treatment of the cold helium gas after heat exchange is not affected.

[0037] Preferably, the outer guide pipe 7 close to the side of the air outlet pipe 5 is fixedly connected to the circulation pipe 6 through the first transverse connecting rod 12, so as to improve the connection stability of the outer guide pipe 7.

[0038] Preferably, the connecting pipe 11 close to the side of the air outlet pipe 5 is fixedly connected to the circulation pipe 6 through the second transverse connecting rod 13, so as to improve the connection stability of the connecting pipe 11.

[0039] Preferably, the guide valve 14, the main control valve 15, the diverter valve 16, the diverter branch valve 17, and the connecting valve 18 all use electric control valves, which are convenient for real-time control of the opening and closing of the guide valve 14, the main control valve 15, the diverter valve 16, the diverter branch valve 17, and the connecting valve 18. The guide valve 14, the main control valve 15, the diverter valve 16, the diverter branch valve 17, and the connecting valve 18 are all existing technologies.

[0040] Preferably, the heat dissipation insulating sleeve 3 is fixedly connected to the inside with a main controller, and the main controller is electrically connected to the temperature monitoring mechanism, the guide valve 14, the main control valve 15, the diverter valve 16, the diverter branch valve 17, and the connecting valve 18. The main controller is a prior art, and the main controller can be used to cooperate with the local hot spot position to carry out timely processing, and the introduced cold helium gas can be diverted by the mutual cooperation of the guide valve 14, the main control valve 15, the diverter valve 16, the diverter branch valve 17, and the connecting valve 18.

[0041] The workflow of the present invention is as follows:

[0042] When no local hot spot appears, all the main control valves 15 are connected, the diverter valve 14, the diverter valve 16, the diverter branch valve 17, and the connecting valve 18 are all kept closed, and the input and circulation of cold helium are maintained to dissipate heat for the double-cake coil. When a local hot spot appears, the temperature monitoring mechanism detects that the local temperature rises, and divides the circulation pipeline 6 into a cold helium inlet side and a cold helium outlet side with the local hot spot as the center; the main control valve 15 and the diverter valve 16 located on the cold helium inlet side and the connecting valve 18 close to the local hot spot are in an open state, and the guide valve 14, the diverter branch valve 17, and the connecting valve 18 far away from the local hot spot are in a closed state, and the cold helium is diverted, and a part of it is used for subsequent heat dissipation treatment; the guide valve 14 and the diverter branch valve 17 located on the cold helium outlet side are in an open state, and the main control valve 15, the diverter valve 16, and the connecting valve 18 are in a closed state, and the other part of the diverted cold helium is led out to the outer guide pipe 7 through the guide branch pipe 8 on the cold helium outlet side after heat exchange with the local hot spot, and is merged and led out through the outlet pipe 5, so as to avoid the influence of the cold helium with increased temperature on the subsequent heat exchange treatment.

Claims

1. A high-temperature superconducting rotor magnet integrated heat treatment device, characterized in that: It comprises a first double-pancake coil (1) and a second double-pancake coil (2), wherein a heat dissipation insulating sleeve (3) is fixedly connected between the first double-pancake coil (1) and the second double-pancake coil (2), an air inlet pipe (4) and an air outlet pipe (5) are fixedly connected to the heat dissipation insulating sleeve (3), and one end of the air inlet pipe (4) and the air outlet pipe (5) located inside the heat dissipation insulating sleeve (3) are connected via a circulation pipe (6); A plurality of temperature monitoring mechanisms are fixedly connected to the contact surfaces of the first double-pancake coil (1), the second double-pancake coil (2) and the heat dissipation insulating sleeve (3), and are used to monitor the generation of local hot spots on the first double-pancake coil (1) and the second double-pancake coil (2); A plurality of flow diversion mechanisms are evenly arranged on the outer side of the circulation pipeline (6) near the air inlet pipe (4). When a local hot spot is encountered, the input cold helium gas is divided into two parts, one part is used for heat exchange with the local hot spot, and the other part bypasses the local hot spot for heat exchange in the subsequent circulation pipeline (6).

2. The high-temperature superconducting rotor magnet integrated heat treatment device according to claim 1, characterized in that: Each of the flow-dividing mechanisms comprises a flow-dividing pipe (9) fixedly connected to the circulation pipe (6); each of the flow-dividing pipes (9) is fixedly connected to a flow-dividing valve (16); one end of the flow-dividing pipe (9) is fixedly connected to a connecting pipe (11); and one side of the connecting pipe (11) located at the connection between the flow-dividing pipe (9) and the connecting pipe (11) is fixedly connected to a connecting valve (18).

3. The high-temperature superconducting rotor magnet integrated heat treatment device according to claim 1, characterized in that: The circulation pipeline (6) is fixedly connected to a flow guide branch pipe (8), the flow guide branch pipe (8) is fixedly connected to a flow guide valve (14), one end of the flow guide branch pipe (8) is fixedly connected to an outer flow guide pipe (7), and one end of the outer flow guide pipe (7) is in communication with an air outlet pipe (5).

4. The high-temperature superconducting rotor magnet integrated heat treatment device according to claim 2, characterized in that: A main control valve (15) is fixedly connected to one side of each branch pipe (9) on the circulation pipeline (6).

5. The high-temperature superconducting rotor magnet integrated heat treatment device according to claim 2, characterized in that: Each of the flow branch pipes (9) is fixedly connected to a flow branch pipe (10), one end of the flow branch pipe (10) is in communication with the circulation pipe (6), and a flow branch valve (17) is fixedly connected to the flow branch pipe (10).

6. The high-temperature superconducting rotor magnet integrated heat treatment device according to claim 3, characterized in that: The outer flow guide pipe (7) close to the side of the air outlet pipe (5) is fixedly connected to the circulation pipe (6) via a first transverse connecting rod (12).

7. The high-temperature superconducting rotor magnet integrated heat treatment device according to claim 2, characterized in that: The connecting pipe (11) close to the side of the air outlet pipe (5) is fixedly connected to the circulation pipe (6) via a second transverse connecting rod (13).

8. The high-temperature superconducting rotor magnet integrated heat treatment sheet device according to claim 5, characterized in that: The guide valve (14), main control valve (15), diverter valve (16), diverter branch valve (17), and connecting valve (18) are all electrically controlled valves.

9. The high-temperature superconducting rotor magnet integrated heat treatment device according to claim 8, characterized in that: A main controller is fixedly connected inside the heat dissipation insulating sleeve (3), and the main controller is electrically connected to the temperature monitoring mechanism, the guide valve (14), the main control valve (15), the diverter valve (16), the diverter branch valve (17), and the connecting valve (18).

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