High-temperature control device for outgoing cable of generator

Abstract

A generator outlet cable high temperature control device disclosed by the present invention comprises a high-voltage cabinet body, a three-phase busbar is installed on the inner wall of the high-voltage cabinet body, a power cable is connected to the three-phase busbar, and a temperature sensor and a current transformer are arranged on the outer side of one end, close to the three-phase busbar, of the power cable. A monitoring host is arranged on one side of the temperature sensor and one side of the current transformer. The beneficial effects are that through an electromagnetic field induction principle, an original single cable of each phase on a three-phase busbar is removed, three cables of three phases are respectively connected with the three-phase busbar of the high-voltage cabinet, and the induction intensity and energy of an induction electromagnetic field between each phase are offset, so that the heating phenomenon of the high-voltage cable is reduced, the potential safety hazard of high-voltage electric equipment is reduced, and the service life of the high-voltage electric equipment is prolonged. And long-period safe operation of steam turbine power generation is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of cable high-temperature control devices, and in particular to a generator outlet cable high-temperature control device. Background Art

[0002] A generator is a mechanical device that converts other forms of energy into electrical energy. It is driven by a turbine, steam turbine, diesel engine or other power machinery, and converts the energy generated by water flow, air flow, fuel combustion or nuclear fission into mechanical energy and transmits it to the generator, which then converts it into electrical energy.

[0003] When the existing steam turbine is running for a long period of time or at a high load, the generator interconnecting line will heat up. If the temperature is too high, the insulation layer of the high-voltage cable will be damaged, resulting in a short circuit between the cable phases, which may cause shutdown and equipment and personal safety accidents, and will also affect the power system. Therefore, a high-temperature control device for the generator outlet cable is urgently needed to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a high temperature control device for generator outlet cables in order to solve the above problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions: A high-temperature control device for an outlet cable of a generator comprises a high-voltage cabinet, a three-phase busbar is installed on the inner wall of the high-voltage cabinet, a power cable is connected to the three-phase busbar, a temperature sensor and a current transformer are arranged on the outer side of one end of the power cable close to the three-phase busbar, a monitoring host is arranged on one side of the temperature sensor and the current transformer, a wireless communicator is installed on one side wall of the monitoring host, a display screen is arranged on the monitoring host, three groups of conductive cores are built in the power cable, and an armor layer, a flame retardant layer and an outer sheath are arranged in sequence on the outer side of the conductive core.

[0006] Furthermore, the power cable adopts a three-phase 3*300mm² armored cross-linked cable, and the free end of the power cable is connected to the steam turbine.

[0007] By adopting the above technical solution, since the power cable adopts a three-phase 3*300mm² armored cross-linked cable, the three-phase current is symmetrical, the electromagnetic fields between each phase interconnection line cancel each other out, and the total magnetic field strength is zero, which will not cause heating of the interconnection line, avoid equipment hidden dangers, and ensure the safe and stable operation of the turbine.

[0008] Furthermore, the temperature sensor and the current transformer are both mounted on the power cable, and the temperature sensor and the current transformer are electrically connected to the monitoring host.

[0009] By adopting the above technical solution, the temperature sensor can detect the temperature of the power cable, and the current transformer can detect the current of the power cable.

[0010] Furthermore, the wireless communicator is mounted on the monitoring host by screws, and the display screen is electrically connected to the monitoring host.

[0011] By adopting the above technical solution, the temperature sensor and the current transformer transmit the detected data to the monitoring host for processing and separation, the monitoring host transmits the processing result to the background through the wireless communicator, and the display screen displays the processing result.

[0012] Furthermore, the armor layer is bonded to the flame retardant layer, the outer sheath is bonded to the flame retardant layer, and the material of the outer sheath is rubber.

[0013] By adopting the above technical solution, the flame retardant layer can make the power cable have flame retardant properties, the outer sheath can protect the power cable, and the armor layer can improve the strength of the power cable.

[0014] Furthermore, a mounting frame is welded on the inner wall of the high-voltage cabinet, electrical components are fixed on the mounting frame, and a communication cable is arranged between the electrical components and the three-phase busbar.

[0015] By adopting the above technical solution, the communication cable can connect the three-phase busbar with the electrical component, thereby enabling the electrical component to control the power system.

[0016] Furthermore, a cabinet door is installed on one side wall of the high-voltage cabinet body through a hinge, a visual window is arranged on the cabinet door, and a handle is fixed on the visual window.

[0017] By adopting the above technical solution, the electrical components can be installed by opening the cabinet door, and the visual window can facilitate observation of the information on the display screen on the monitoring host.

[0018] Furthermore, a through cavity is opened on one side wall of the high-voltage cabinet, and a breathable net is installed in the through cavity by screws.

[0019] By adopting the above technical solution, the air-permeable net in the through cavity can ensure the circulation of air in the high-voltage cabinet.

[0020] Furthermore, a cooling fan is installed at the upper end of the high-voltage cabinet, and a dustproof net is installed on the cooling port of the cooling fan.

[0021] By adopting the above technical solution, the heat dissipation fan can dissipate heat in the high-voltage cabinet, and the dustproof net can prevent dust from inside the cabinet.

[0022] Furthermore, the communication cable and the power cable are separately arranged and reasonably laid out.

[0023] By adopting the above technical solution and rationally laying out the outgoing cables, a new wide cable channel is created, so that the power cables outgoing from the generator are laid out separately and run separately from the communication cables, thereby reducing the mutual signal interference between the power cables and the communication cables and avoiding the equipment from jumping due to malfunction.

[0024] The specific working principle is: the free end of the power cable is connected to the steam turbine generator, and the electric energy generated by the steam turbine generator is transmitted to the high-voltage cabinet through the power cable. The communication cable can connect the three-phase busbar to the electrical component, so that the electrical component can control the power system. In the power generation process, since the power cable adopts a three-phase 3*300mm² armored cross-linked cable, because the three-phase current is symmetrical, the electromagnetic fields between each phase of the interconnection line cancel each other out, and the sum of the magnetic field strength is zero, which will not cause the heating of the interconnection line, avoid equipment hidden dangers, and ensure the safe and stable operation of the steam turbine. The temperature sensor and the current transformer transmit the detected data to the monitoring host for processing and separation. The monitoring host transmits the processing results to the background through the wireless communicator, and the display screen displays the processing results, thereby realizing real-time monitoring of the cable status, temperature, current and other information, improving the safety and reliability of the power grid, and at the same time, the flame retardant layer can make the power cable have flame retardant properties, the outer sheath can protect the power cable, and the armor layer can improve the strength of the power cable.

[0025] The beneficial effects of the present invention are: Through the principle of electromagnetic field induction, the original single cable per phase on the three-phase busbar is removed, and three cables of three phases are used to connect the three-phase busbar of the high-voltage cabinet respectively, to offset the induction intensity and energy of the induced electromagnetic field between each phase, thereby reducing the heating phenomenon of the high-voltage cable, reducing the safety hazards of high-voltage electrical equipment, and ensuring the long-term safe operation of the steam turbine power generation; Adopting the technology of intelligent cable monitoring, installing temperature sensors, current transformers, monitoring hosts and wireless selectors on power cables, so as to monitor the status, temperature, current and other information of cables in real time and improve the safety and reliability of power grid; The power cables and communication cables are arranged separately and reasonably, so as to reduce the mutual signal interference between the power cables and the communication cables and avoid the equipment jumping due to malfunction. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a front view of a high temperature control device for an outlet cable of a generator according to the present invention; Figure 2 It is a schematic diagram of the internal structure of a high-voltage cabinet in a high-temperature control device for an outlet cable of a generator according to the present invention; Figure 3 The invention relates to a high temperature control device for the generator outlet cable. Figure 2 The enlarged view of point A in the middle; Figure 4 It is a cross-sectional view of a power cable in a high-temperature control device for an outlet cable of a generator described in the present invention.

[0027] The following are the descriptions of the reference numerals: 1. High-voltage cabinet; 2. Cabinet door; 3. Cooling fan; 4. Dust-proof net; 5. Through cavity; 6. Breathable net; 7. Power cable; 8. Three-phase busbar; 9. Temperature sensor; 10. Current transformer; 11. Monitoring host; 12. Display screen; 13. Wireless communicator; 14. Communication cable; 15. Mounting frame; 16. Electrical components; 17. Handle; 18. Visual window; 19. Outer sheath; 20. Flame retardant layer; 21. Armor layer; 22. Conductive core. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings: like Figure 1-Figure 4 As shown, a high temperature control device for generator outlet cable comprises a high-voltage cabinet 1, a three-phase busbar 8 is installed on the inner wall of the high-voltage cabinet 1, a power cable 7 is connected to the three-phase busbar 8, the high-voltage cabinet 1 is connected to the steam turbine generator, a temperature sensor 9 and a current transformer 10 are arranged on the outer side of one end of the power cable 7 close to the three-phase busbar 8, the temperature and power of the power cable 7 can be monitored in real time, a monitoring host 11 is arranged on one side of the temperature sensor 9 and the current transformer 10, a wireless communicator 13 is installed on one side wall of the monitoring host 11, the monitoring data can be transmitted to the background, the monitoring host 11 is provided with a display screen 12, the monitoring data can be viewed on site, the power cable 7 has three groups of conductive cores 22 built in, the outer side of the conductive core 22 is sequentially provided with an armor layer 21, a flame retardant layer 20 and an outer sheath 19, the conductive core 22 can be protected.

[0029] In this embodiment, the power cable 7 adopts a three-phase 3*300mm² armored cross-linked cable, and the free end of the power cable 7 is connected to the steam turbine. Since the power cable 7 adopts a three-phase 3*300mm² armored cross-linked cable, because the three-phase current is symmetrical, the electromagnetic fields between each phase interconnection line cancel each other out, and the total magnetic field strength is zero, which will not cause heating of the interconnection line, avoid equipment hidden dangers, and ensure safe and stable operation of the steam turbine.

[0030] In this embodiment, the temperature sensor 9 and the current transformer 10 are both mounted on the power cable 7, and the temperature sensor 9 and the current transformer 10 are electrically connected to the monitoring host 11. The temperature sensor 9 can detect the temperature of the power cable 7, and the current transformer 10 can detect the current of the power cable 7.

[0031] In this embodiment, the wireless communicator 13 is installed on the monitoring host 11 by screws, the display screen 12 is electrically connected to the monitoring host 11, the temperature sensor 9 and the current transformer 10 transmit the detected data to the monitoring host 11 for processing and separation, the monitoring host 11 transmits the processing results to the background through the wireless communicator 13, and the display screen 12 displays the processing results.

[0032] In this embodiment, the armor layer 21 is bonded to the flame retardant layer 20, and the outer sheath 19 is bonded to the flame retardant layer 20. The outer sheath 19 is made of rubber. The flame retardant layer 20 can make the power cable 7 have flame retardant properties. The outer sheath 19 can protect the power cable 7, and the armor layer 21 can increase the strength of the power cable 7.

[0033] In this embodiment, a mounting frame 15 is welded on the inner wall of the high-voltage cabinet 1, and an electrical component 16 is fixed on the mounting frame 15. A communication cable 14 is arranged between the electrical component 16 and the three-phase busbar 8. The communication cable 14 can connect the three-phase busbar 8 with the electrical component 16, so that the electrical component 16 can control the power system.

[0034] In this embodiment, a cabinet door 2 is installed on one side wall of the high-voltage cabinet body 1 through a hinge, and a visual window 18 is provided on the cabinet door 2. A handle 17 is fixed on the visual window 18. The cabinet door 2 can be opened to install the electrical component 16. The visual window 18 can facilitate observation of the information on the display screen 12 on the monitoring host 11.

[0035] In this embodiment, a through cavity 5 is opened on one side wall of the high-voltage cabinet 1 , and a breathable net 6 is installed in the through cavity 5 by screws. The breathable net 6 in the through cavity 5 can ensure the circulation of air in the high-voltage cabinet 1 .

[0036] In this embodiment, a cooling fan 3 is installed at the upper end of the high-voltage cabinet 1, and a dustproof net 4 is installed on the cooling port of the cooling fan 3. The cooling fan 3 can dissipate heat inside the high-voltage cabinet 1, and the dustproof net 4 can prevent dust from inside the cabinet.

[0037] In this embodiment, the communication cable 14 is separately arranged from the power cable 7 and is reasonably arranged. By reasonably arranging the outgoing cables, a new wide cable channel is created, so that the generator outgoing power cable 7 is laid out separately and is separated from the communication cable 14, thereby reducing mutual signal interference between the power cable 7 and the communication cable 14 and avoiding equipment malfunction causing the vehicle to jump.

[0038] The specific working principle is: the free end of the power cable 7 is connected to the steam turbine generator, and the electric energy generated by the steam turbine generator is transmitted to the high-voltage cabinet 1 through the power cable 7. The communication cable 14 can connect the three-phase busbar 8 with the electrical component 16, so that the electrical component 16 can control the power system. During the power generation process, since the power cable 7 adopts a three-phase 3*300mm² armored cross-linked cable, because the three-phase current is symmetrical, the electromagnetic fields between each phase of the interconnection line cancel each other out, and the sum of the magnetic field strength is zero, which will not cause heating of the interconnection line, avoid equipment hidden dangers, and ensure The steam turbine operates safely and stably, the temperature sensor 9 and the current transformer 10 transmit the detected data to the monitoring host 11 for processing and separation, the monitoring host 11 transmits the processing result to the background through the wireless communicator 13, and the display screen 12 displays the processing result, thereby realizing real-time monitoring of the cable status, temperature, current and other information, improving the safety and reliability of the power grid, and at the same time, the flame retardant layer 20 can make the power cable 7 have flame retardant properties, the outer sheath 19 can protect the power cable 7, and the armor layer 21 can improve the strength of the power cable 7.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A high temperature control device for a generator outlet cable, characterized in that: The invention comprises a high-voltage cabinet (1), wherein a three-phase busbar (8) is installed on the inner wall of the high-voltage cabinet (1), a power cable (7) is connected to the three-phase busbar (8), a temperature sensor (9) and a current transformer (10) are arranged on the outer side of one end of the power cable (7) close to the three-phase busbar (8), a monitoring host (11) is arranged on one side of the temperature sensor (9) and the current transformer (10), a wireless communicator (13) is installed on one side wall of the monitoring host (11), a display screen (12) is arranged on the monitoring host (11), and three groups of conductive cores (22) are built in the power cable (7), and an armor layer (21), a flame retardant layer (20) and an outer sheath (19) are arranged in sequence on the outer side of the conductive core (22).

2. A high temperature control device for generator outlet cables according to claim 1, characterized in that: The power cable (7) is a three-phase 3*300 mm² armored cross-linked cable, and the free end of the power cable (7) is connected to the steam turbine.

3. A high temperature control device for generator outlet cables according to claim 1, characterized in that: The temperature sensor (9) and the current transformer (10) are both sleeved on the power cable (7), and the temperature sensor (9) and the current transformer (10) are electrically connected to the monitoring host (11).

4. A high temperature control device for generator outlet cables according to claim 1, characterized in that: The wireless communicator (13) is mounted on the monitoring host (11) by means of screws, and the display screen (12) is electrically connected to the monitoring host (11).

5. A high temperature control device for generator outlet cables according to claim 1, characterized in that: The armor layer (21) is bonded to the flame retardant layer (20), the outer sheath (19) is bonded to the flame retardant layer (20), and the material of the outer sheath (19) is rubber.

6. A high temperature control device for generator outlet cables according to claim 1, characterized in that: A mounting frame (15) is welded on the inner wall of the high-voltage cabinet (1), an electrical component (16) is fixed on the mounting frame (15), and a communication cable (14) is provided between the electrical component (16) and the three-phase busbar (8).

7. A high temperature control device for generator outlet cables according to claim 6, characterized in that: A cabinet door (2) is installed on one side wall of the high-voltage cabinet body (1) via a hinge, a visual window (18) is provided on the cabinet door (2), and a handle (17) is fixed on the visual window (18).

8. A high temperature control device for generator outlet cables according to claim 7, characterized in that: A through cavity (5) is provided on one side wall of the high-voltage cabinet (1), and a breathable net (6) is installed in the through cavity (5) by means of screws.

9. A high temperature control device for generator outlet cables according to claim 8, characterized in that: A cooling fan (3) is installed at the upper end of the high-voltage cabinet (1), and a dustproof net (4) is installed on the cooling port of the cooling fan (3).

10. A high temperature control device for an outlet cable of a generator according to claim 9, characterized in that: The communication cable (14) and the power cable (7) are arranged separately and in a reasonable layout.

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