Quick connection device for emergency repair of isolated-phase bus circuit breaker

Abstract

The invention, which relates to the technical field of bus repair, discloses an isolated-phase enclosed bus circuit breaker repair quick-connection device comprising an isolated-phase enclosed bus quick-connection section and a support structure, the isolated-phase enclosed bus quick-connection section is matched with a side isolated-phase enclosed bus to be connected, and the support structure is arranged at the bottom of the isolated-phase enclosed bus quick-connection section. The isolated-phase enclosed bus quick-connection section and the isolated-phase enclosed bus to be connected at the side are located at the same horizontal height; according to the invention, a section of isolated-phase enclosed bus is directly used as the isolated-phase enclosed bus quick-connection section, and only a supporting structure needs to be arranged at the bottom of the isolated-phase enclosed bus quick-connection section, so that the isolated-phase enclosed bus quick-connection section and the isolated-phase enclosed bus to be connected on the side are located at the same horizontal height; and then the isolated-phase enclosed bus quick-connection section is connected with the isolated-phase enclosed bus to be connected on the side to complete emergency repair, so that the operation of the unit can be recovered without waiting for a circuit breaker, and the repair efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of busbar emergency repair, in particular to an emergency repair quick-connect device for a phase-isolated enclosed busbar circuit breaker. Background Art

[0002] With the development of the power system, in order to improve the availability of hydropower units and nuclear power units and improve the safety and stability of the system, the generator output circuit breaker is generally used as the disconnection point between the unit and the system, and capacitors are installed on both sides of the circuit breaker to limit the transient recovery voltage rise rate of the system. For large hydropower and nuclear power units, considering the current performance of the connection between the unit and the generator output switch, the main transformer, the equipment installation space, the equipment insulation performance and other issues, the current mainly uses the phase-isolated closed busbar to solve these problems.

[0003] However, the production cycle of generator export circuit breaker equipment, both domestically and abroad, is relatively long, generally greater than 6 months, and the installation cycle of generator export circuit breaker equipment is about 1 month. If the unit is shut down due to a generator export circuit breaker failure, for large units, the longer the shutdown time, the greater the impact on the power system, and the greater the loss to the power plant.

[0004] Therefore, people are in urgent need of a quick-connect device for repairing a phase-isolated enclosed busbar circuit breaker with high repair efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a phase-isolated enclosed busbar circuit breaker emergency repair quick-connect device to solve the problems existing in the above-mentioned prior art. By using a phase-isolated enclosed busbar quick-connect section to replace the circuit breaker as an emergency repair device, the repair efficiency can be effectively improved and the operation of the unit can be restored as soon as possible.

[0006] To achieve the above-mentioned purpose, the present invention provides the following solution: The present invention provides a quick-connect device for emergency repair of an isolated-phase enclosed busbar circuit breaker, comprising an isolated-phase enclosed busbar quick-connect section and a supporting structure, wherein the isolated-phase enclosed busbar quick-connect section matches the side isolated-phase enclosed busbar to be connected, and the supporting structure is arranged at the bottom of the isolated-phase enclosed busbar quick-connect section, and the isolated-phase enclosed busbar quick-connect section and the side isolated-phase enclosed busbar to be connected are located at the same horizontal height.

[0007] Preferably, the conductor end of the phase-isolated enclosed busbar quick-connect section is flexibly connected to the conductor of the phase-isolated enclosed busbar to be connected at the side.

[0008] Preferably, the supporting structure comprises a triangular supporting member, and the triangular supporting member is welded to the outer shell of the phase-isolated closed busbar quick-connect section.

[0009] Preferably, the support structure further comprises a pad block, and the pad block is arranged below the triangular support member.

[0010] Preferably, the support structure further comprises a support frame, and the support frame is arranged below the triangular support member.

[0011] Preferably, at least two triangular support members are provided at the bottom of the phase-isolated closed busbar quick-connect section.

[0012] Preferably, the phase-isolated enclosed busbar quick-connect section is provided with a capacitor installation platform, the capacitor installation platform is installed with a capacitor, and the capacitor is connected to the phase-isolated enclosed busbar quick-connect section.

[0013] Preferably, the capacitor mounting platform is a box, and the capacitor is arranged inside the box.

[0014] Preferably, an inspection door is provided on the box body.

[0015] Preferably, a clamp is provided at the end of the shell of the phase-isolated closed busbar quick-connect section, and along the axial direction of the phase-isolated closed busbar quick-connect section, the length of the clamp is not less than the distance between the shell of the phase-isolated closed busbar quick-connect section and the shell of the phase-isolated closed busbar to be connected on the side.

[0016] Compared with the prior art, the present invention mainly achieves the following technical effects:

[0017] Directly use a section of off-phase enclosed busbar as the off-phase enclosed busbar quick-connect section. Only need to set up a supporting structure at the bottom of the off-phase enclosed busbar quick-connect section, so that the off-phase enclosed busbar quick-connect section and the side off-phase enclosed busbar to be connected are at the same level. Then connect the off-phase enclosed busbar quick-connect section with the side off-phase enclosed busbar to be connected to complete the emergency repair. The operation of the unit can be restored without waiting for the circuit breaker, and the repair efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a structural schematic diagram of the quick-connect device for emergency repair of the isolated-phase enclosed busbar circuit breaker in an embodiment of the present invention without showing the supporting structure;

[0020] Figure 2 It is a left-side structural schematic diagram of the quick-connect device for emergency repair of the isolated-phase enclosed busbar circuit breaker in the embodiment of the present invention without showing the supporting structure;

[0021] Figure 3 It is a structural schematic diagram of a case where a plurality of phase-isolated closed busbar quick-connection sections are arranged on a support frame in an embodiment of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the connection between the phase-isolated enclosed busbar quick-connect section and the side phase-isolated enclosed busbar to be connected in an embodiment of the present invention;

[0023] Figure 5 It is a top view of the connection between the phase-isolated enclosed busbar quick-connect section and the phase-isolated enclosed busbar to be connected on the side in an embodiment of the present invention;

[0024] Among them, 1. Phase-isolated closed busbar quick-connect section; 2. Shell; 3. Conductor; 4. Triangular support; 5. Support frame; 6. Capacitor installation platform; 7. Capacitor; 8. Clamp; 9. Phase-isolated closed busbar. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The purpose of the present invention is to provide a phase-isolated enclosed busbar circuit breaker emergency repair quick-connect device to solve the problems existing in the prior art. The phase-isolated enclosed busbar quick-connect section is used to replace the circuit breaker as an emergency repair device, which can effectively improve the repair efficiency and restore the operation of the unit as soon as possible.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Please refer to Figures 1 to 5As shown, a phase-isolated enclosed busbar circuit breaker emergency repair quick-connect device is provided, including a phase-isolated enclosed busbar quick-connect section 1 and a supporting structure. The phase-isolated enclosed busbar quick-connect section 1 is a section of phase-isolated enclosed busbar cut off, and the phase-isolated enclosed busbar quick-connect section 1 matches the phase-isolated enclosed busbar 9 to be connected on the side, that is, the shell 2, conductor 3, insulation distance and other dimensions of the phase-isolated enclosed busbar quick-connect section 1 match the phase-isolated enclosed busbar on the generator side and the phase-isolated enclosed busbar on the main transformer side connected to its two ends as required, and the supporting structure is arranged at the bottom of the phase-isolated enclosed busbar quick-connect section 1, and is used to connect the phase-isolated enclosed busbar 9 to the generator side and the main transformer side. The closed bus quick-connect section 1 plays the role of supporting and controlling its height, so that the phase-off closed bus quick-connect section 1 and the side phase-off closed bus 9 to be connected are at the same horizontal height; the device directly uses a section of phase-off closed bus as the phase-off closed bus quick-connect section 1, and only needs to set a supporting structure at the bottom of the phase-off closed bus quick-connect section 1, and then connect the phase-off closed bus quick-connect section 1 with the side phase-off closed bus 9 to be connected to complete the emergency repair, and the operation of the unit can be restored without waiting for the circuit breaker, which can realize the normal operation of the unit during the circuit breaker production cycle, and the repair efficiency is high.

[0029] In this embodiment, the end of the conductor 3 of the phase-isolated enclosed busbar quick-connect section 1 is softly connected to the conductor of the phase-isolated enclosed busbar 9 to be connected at the side.

[0030] In this embodiment, the supporting structure includes a triangular support member 4, and the triangular support member 4 is welded to the outer shell 2 of the phase-isolated closed busbar quick-connect section 1 to improve the supporting effect.

[0031] In order to achieve adjustable height of the phase-isolated closed busbar quick-connect section 1, the support structure also includes pads, which are arranged under the triangular support member 4. The height of the triangular support member 4 is adjusted by the number of pads, thereby adjusting the height of the phase-isolated closed busbar quick-connect section 1.

[0032] In order to adapt to higher environments, the support structure also includes a support frame 5, which is arranged below the triangular support member 4. The support frame 5 is composed of a cross bar and a column. When the constructed support frame 5 is sufficient to ensure that the isolated-phase closed busbar quick-connect section 1 and the side isolated-phase closed busbar 9 to be connected are at the same horizontal height, the triangular support member 4 can be welded to the support frame 5 or bolted to the support frame 5, and pads are not required at this time.

[0033] When the circuit breaker of the multi-phase circuit in the unit needs to be replaced, a plurality of isolated-phase closed busbar quick-connect sections 1 can be arranged on the support frame 5 .

[0034] In order to improve the support stability, at least two triangular support members 4 are arranged at the bottom of the phase-isolated closed busbar quick-connect section 1. In this embodiment, two triangular support members 4 are arranged. The two triangular support members 4 are located on the outer shell 2 of the phase-isolated closed busbar quick-connect section 1 and are respectively close to the two end portions.

[0035] The isolated phase closed busbar quick-connect section 1 is provided with a capacitor installation platform 6, and the capacitor installation platform 6 is installed with a capacitor 7. The capacitor 7 is connected to the isolated phase closed busbar quick-connect section 1. The capacitor 7 can smooth the voltage, reduce electromagnetic interference and improve system stability.

[0036] In order to improve the protection effect of the capacitor 7, the capacitor installation platform 6 is a box, and the capacitor 7 is arranged inside the box.

[0037] An inspection door is provided on the box body to facilitate maintenance and inspection of the capacitor 7.

[0038] A clamp 8 is provided at the end of the shell 2 of the phase-isolated closed busbar quick-connect section 1. Along the axial direction of the phase-isolated closed busbar quick-connect section 1, the length of the clamp 8 is not less than the distance between the shell 2 of the phase-isolated closed busbar quick-connect section 1 and the shell of the side phase-isolated closed busbar 9 to be connected. After the phase-isolated closed busbar quick-connect section 1 is connected to the side phase-isolated closed busbar 9 to be connected, one end of the clamp 8 is welded to the shell 2 of the phase-isolated closed busbar quick-connect section 1, and the other end is welded to the shell of the side phase-isolated closed busbar 9 to be connected, thereby improving the connection stability and the connection sealing.

[0039] During actual use, first cut out the required length of the phase-isolated closed busbar quick-connect section 1, and then connect the supporting structure. This step generally takes about 15 days. Finally, the two ends of the phase-isolated closed busbar quick-connect section 1 connected to the supporting structure are soft-connected to the phase-isolated closed busbar on the generator side and the phase-isolated closed busbar on the main transformer side. Then, use the clamp 8 to complete the sealing welding of the shell 2 of the phase-isolated closed busbar quick-connect section 1 and the shell of the side phase-isolated closed busbar 9. This step generally takes 5-7 days. After the connection is completed, tests can be carried out and the device can be put into operation after the test. The whole process takes about 30 days. After the circuit breaker is transported to the site, the device can be dismantled and the circuit breaker can be replaced.

[0040] Adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0041] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0042] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A quick-connect device for emergency repair of a phase-isolated enclosed busbar circuit breaker, characterized in that: It includes a phase-isolated closed busbar quick-connect section and a supporting structure. The phase-isolated closed busbar quick-connect section matches the phase-isolated closed busbar to be connected on the side. The supporting structure is arranged at the bottom of the phase-isolated closed busbar quick-connect section. The phase-isolated closed busbar quick-connect section and the phase-isolated closed busbar to be connected on the side are located at the same horizontal height.

2. The quick-connect device for emergency repair of a phase-isolated enclosed busbar circuit breaker according to claim 1 is characterized in that: The conductor end of the phase-isolated enclosed busbar quick-connect section is softly connected to the conductor of the phase-isolated enclosed busbar to be connected at the side.

3. The quick-connect device for emergency repair of a phase-isolated enclosed busbar circuit breaker according to claim 1 is characterized in that: The support structure comprises a triangular support member, and the triangular support member is welded to the outer shell of the phase-isolated closed busbar quick-connect section.

4. The quick-connect device for emergency repair of a phase-isolated enclosed busbar circuit breaker according to claim 3 is characterized in that: The support structure further comprises a pad, which is arranged below the triangular support member.

5. The quick-connect device for emergency repair of isolated-phase enclosed busbar circuit breaker according to claim 3 is characterized in that: The support structure also includes a support frame, which is arranged below the triangular support member.

6. The quick-connect device for emergency repair of isolated-phase enclosed busbar circuit breaker according to claim 3 is characterized in that: At least two triangular support members are arranged at the bottom of the phase-isolated closed busbar quick-connect section.

7. The quick-connect device for emergency repair of a phase-isolated enclosed busbar circuit breaker according to claim 1 is characterized in that: The phase-isolated enclosed busbar quick-connect section is provided with a capacitor installation platform, the capacitor installation platform is installed with a capacitor, and the capacitor is connected to the phase-isolated enclosed busbar quick-connect section.

8. The quick-connect device for emergency repair of a phase-isolated enclosed busbar circuit breaker according to claim 7 is characterized in that: The capacitor installation platform is a box, and the capacitor is arranged inside the box.

9. The quick-connect device for emergency repair of a phase-isolated enclosed busbar circuit breaker according to claim 8, characterized in that: An inspection door is provided on the box body.

10. The quick-connect device for emergency repair of isolated-phase enclosed busbar circuit breaker according to claim 1, characterized in that: A clamp is provided at the end of the shell of the phase-isolated closed busbar quick-connect section, and along the axial direction of the phase-isolated closed busbar quick-connect section, the length of the clamp is not less than the distance between the shell of the phase-isolated closed busbar quick-connect section and the shell of the phase-isolated closed busbar to be connected on the side.

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