CN217507940U

CN217507940U - GIS double-bus uninterrupted power extension detachable conductor unit and system

Info

Publication number: CN217507940U
Application number: CN202220800381.1U
Authority: CN
Inventors: 韩向阳; 张慧; 夏月明
Original assignee: Sdee Hitachi High Voltage Switchgear Co ltd
Current assignee: Sdee Hitachi High Voltage Switchgear Co ltd
Priority date: 2022-04-07
Filing date: 2022-04-07
Publication date: 2022-09-27
Anticipated expiration: 2032-04-07

Abstract

The utility model relates to a GIS enlargement technical field especially relates to GIS double bus does not have a power failure enlargement with dismantling conductor unit and system. The detachable conductor unit comprises a cylinder body, sealing elements are arranged at two ends of the cylinder body, and three connecting conductors axially penetrating through the sealing elements are arranged on each sealing element; a probing hole is formed in the top of the cylinder body, and a detachable cover body is arranged on the probing hole; the position corresponding to the connecting conductor in the cylinder body is respectively provided with a pair of first conductor and second conductor, the left end of the first conductor is detachably connected with the connecting conductor on the sealing element at the left end of the cylinder body, the other end of the first conductor is detachably connected with the left end of the second conductor, and the right end of the second conductor is detachably connected with the connecting conductor on the sealing element at the right end of the cylinder body. The utility model discloses set up multisection detachable conductor in the closed shell, can be convenient provide the fracture for the generating line, utilize double bus, two detachable conductor unit and cooperation isolator, earthing switch and circuit breaker simultaneously, can break off two generating lines in turn, realize the extension of two generating lines respectively.

Description

Detachable conductor unit and system for GIS double-bus uninterrupted expansion

Technical Field

The utility model relates to a GIS enlargement technical field especially relates to a 126kV level GIS double bus does not have a power failure enlargement system with dismantling conductor unit and using this conductor unit for enlargement without a power failure.

Background

Gas insulated metal-enclosed switches (hereinafter referred to as GIS) are widely used in domestic power systems by virtue of their advantages of small land occupation, small installation and maintenance workload, etc., and how to implement flexible expansion of GIS on the premise of no power outage or as short as possible has become a focus of attention of relevant departments of power construction.

At present, under the condition that a long-term project needs to be expanded, the whole station needs to be completely powered off, power can be supplied again after the long-term expansion interval is completed and a debugging test is finished, and thus a long time is delayed. In the era of rapid development, power plays an important role, power failure means shutdown and production stoppage, production and life of people are seriously affected, the phenomenon does not meet the requirement of power industry development, at present, the realization of uninterrupted GIS is particularly important, so that a lot of research is carried out around the field, but most of the existing functional modules for uninterrupted GIS have complex structures and are inconvenient to operate, and the miniaturization requirement cannot be met.

Disclosure of Invention

In order to solve the problem, the utility model provides a to the conductor unit dismantled of 126kV GIS double bus wiring mode expansion usefulness that does not have a power failure, it has set up miniaturized detachable fracture on the main bus, forms independent air chamber, to the configuration of GIS double bus wiring mode, has realized the expansion that does not have a power failure in the true sense.

A detachable conductor unit for GIS double-bus uninterrupted extension comprises a cylinder, wherein sealing elements are arranged at two ends of the cylinder, three connecting conductors which axially penetrate through the sealing elements are arranged on each sealing element, the positions of the connecting conductors at the two ends correspond to each other, and the outer ends of the connecting conductors are used for connecting buses; a probing hole is formed in the top of the cylinder body, and a detachable cover body is arranged on the probing hole; the position corresponding to the connecting conductor in the cylinder body is respectively provided with a pair of first conductor and second conductor, the left end of the first conductor is detachably connected with the connecting conductor on the sealing element at the left end of the cylinder body, the other end of the first conductor is detachably connected with the left end of the second conductor, and the right end of the second conductor is detachably connected with the connecting conductor on the sealing element at the right end of the cylinder body.

Furthermore, a contact is arranged at the inner end of the connecting conductor on the left end sealing element, and the left end of the first conductor is inserted into the contact and connected with the connecting conductor.

Preferably, the seal is a non-porous insulator.

Preferably, the connecting conductors on the same sealing element are arranged in a shape like a Chinese character 'pin' and are respectively connected with the circuits of the A phase, the B phase and the C phase.

The utility model provides a GIS double bus does not have a power failure extension system, includes first generating line and second generating line, respectively be equipped with a detachable conductor unit on first generating line, the second generating line between interval and long-term extension interval this period. Through the alternative disconnection and the closing of the two detachable conductor units, the uninterrupted extension of the two buses is realized respectively.

Furthermore, a main transformer incoming circuit, an outgoing circuit, a bus coupler circuit and a bus voltage transformer circuit are arranged on the first bus and the second bus in the current period, and a standby outgoing circuit is arranged on the long-term extension circuit; three-station isolation grounding switches, isolation switches and circuit breakers are arranged on the main transformer incoming circuit, the outgoing circuit and the standby outgoing circuit, one end of each three-station isolation grounding switch is connected with the first bus, one end of each isolation switch is connected with the second bus, and the other end of each three-station isolation grounding switch is connected with the isolation switch in parallel and then connected with the incoming/outgoing circuit through the circuit breaker in series; the first bus and the second bus are connected through a circuit breaker of the bus coupler; and a fast grounding switch is arranged on the bus voltage transformer circuit.

The utility model discloses a can be used to the conductor unit dismantled of expansion that does not have a power failure of generating line, this unit is through setting up multisection detachable conductor in the enclosure to set up the handle hole on the enclosure, through dismantling the conductor, can be convenient for the generating line provides the fracture, utilizes double bus, two detachable conductor unit and cooperation isolator, earthing switch and circuit breaker simultaneously, can break off two generating lines in turn, realizes the expansion of two generating lines respectively.

Drawings

FIG. 1 is a front cross-sectional view of a detachable conductor unit of the present invention;

FIG. 2 is a left side view of the detachable conductor unit;

FIG. 3 is a circuit diagram of a GIS double-bus uninterrupted expansion system;

in the figure, 1, a detachable conductor unit, 101, a barrel, 102, a connecting conductor, 103, a non-porous insulator, 104, a second conductor, 105, a contact, 106, a first conductor, 107, a probe hole, 108, a detachable cover, 2, a first three-position isolating grounding switch, 3, a first isolating switch, 4, a second three-position isolating grounding switch, 5, a second isolating switch, 6, a fourth circuit breaker, 7, a first quick grounding switch, 8, a second quick grounding switch, 9, a third three-position isolating grounding switch, 10, a third isolating switch, 11, a third circuit breaker, 12, a first circuit breaker, 13 and a second circuit breaker.

Detailed Description

The structure and the operation steps of the present invention will be described in detail with reference to the accompanying drawings.

A detachable conductor unit for GIS double-bus uninterrupted extension is particularly suitable for uninterrupted extension of a 126kV high-voltage switch. As shown in fig. 1 and 2, the device comprises a cylinder 101, wherein two ends of the cylinder 101 are provided with imperforate insulators 103, three connecting conductors 102 are arranged on each imperforate insulator 103 in a delta shape and are respectively used for connecting a phase a, a phase B and a phase C of a bus, and the connecting conductors on the two imperforate insulators 103 are corresponding in position and are ensured to be on a straight line. The connecting conductor 102 axially penetrates the non-porous insulator to electrically connect the inside and outside of the cylinder. A probing hole 107 is formed in the top of the cylinder body 101, and a detachable cover body 108 is arranged on the probing hole 107; the three-phase first conductor 106 and the three-phase second conductor 104 are arranged in the barrel corresponding to the three-phase connecting conductors, the contact 105 is installed on the connecting conductor on the sealing element at the left end of the barrel through a bolt, the left end of the first conductor is connected with the contact in a free insertion mode, the right end of the first conductor is detachably connected with the left end of the second conductor through a bolt, and the right end of the second conductor is detachably connected with the connecting conductor on the sealing element at the right end of the barrel through a bolt.

The disassembly steps of the detachable conductor are as follows:

and opening the detachable cover body, firstly detaching the bolt at the joint of the first conductor and the second conductor, then detaching the bolt at the joint of the second conductor and the right connecting conductor, pushing the first conductor to the bottom leftwards, taking out the second conductor from the exploratory hole, then pulling out the first conductor rightwards, and taking out the first conductor from the exploratory hole. And taking out the three-phase first conductor and the three-phase second conductor according to the sequence, so that the detachable conductor unit is disconnected, and an isolated air chamber which is disconnected from the left and the right is formed. The detachable conductor unit is arranged in a double-bus circuit, so that a fracture can be provided for the bus, and uninterrupted extension of the bus is realized. The concrete structure is as follows:

the utility model provides a GIS double bus does not have a power failure extension system, includes first bus and second bus, respectively be equipped with one on first bus, the second bus and dismantle conductor unit 1 between interval and long-term extension interval this phase. The first bus and the second bus are provided with a main transformer incoming circuit, an outgoing circuit, a bus coupler circuit and a bus voltage transformer circuit in the current period, and a standby outgoing circuit is arranged on the long-term extension circuit.

The construction lines in this period are laid as follows: the first bus is connected with the outgoing line circuit through the first three-station isolation grounding switch 2 and the first breaker 12, and the second bus is connected with the outgoing line circuit through the first isolation switch 3 and the first breaker 12. The first bus is connected with a main transformer incoming line circuit through a second third station isolation grounding switch 4 and a second circuit breaker 13, and the second bus is connected with the main transformer incoming line circuit through a second isolation switch 5 and the second circuit breaker 13. In the bus tie circuit, the first bus and the second bus are connected by a fourth circuit breaker 6. The first bus is connected with a first bus voltage transformer through a first quick grounding switch 7, and the second bus is connected with a second bus voltage transformer through a second quick grounding switch 8.

The long-term extension line is laid as follows: the first bus is connected with a standby outgoing line circuit through a third station isolation grounding switch 9 and a third circuit breaker 11. The second bus is connected with the spare outlet circuit through a third isolating switch 10 and a third open circuit 11.

The uninterrupted expansion operation process of the system is as follows:

when the long-term project needs to be expanded, the first and second three-station isolation grounding switches are operated to enable isolation and grounding to be in a disconnected state, the connection between the first bus and the main transformer incoming line circuit and the outgoing line circuit is disconnected, the fourth circuit breaker is disconnected, the connection between the first bus and the second bus is disconnected, and the first quick grounding switch is connected in a closed grounding mode. At this moment, the incoming line circuit and the outgoing line circuit of the main transformer are normally powered by the second bus, the first bus is in an uncharged state, the detachable conductor unit air chamber on the first bus is deflated, the inner conductor is disassembled, a fracture is formed, and the first bus is disconnected left and right by taking the detachable conductor unit as a boundary. And then, the detachable conductor unit with the conductor disassembled is subjected to cover assembly and inflation. The first quick grounding switch is disconnected and grounded, the fourth circuit breaker is closed, the first and second three-station isolation grounding switches are operated to enable the isolating switch to be in a closed state, at the moment, the main transformer incoming line circuit and the outgoing line circuit are normally powered by two buses together, and the first bus is disconnected left and right by taking the detachable conductor unit as a boundary. Similarly, the second bus bar is operated according to the steps to be left and right disconnected by taking the detachable conductor unit as a boundary. After the operation is completed, the left sides of the two buses are not electrified by taking the detachable conductor unit as a boundary, the built standby outgoing line circuit, the first bus and the second bus are assembled in a butt joint mode, and the third circuit breaker, the third station isolation grounding switch and the third isolating switch are all kept disconnected. Thus, the butt joint installation work of the extension is completed.

And then, operating the first and second three-station isolation grounding switches to enable isolation and grounding to be in an off state, disconnecting the first bus from the incoming line circuit and the outgoing line circuit of the main transformer, and disconnecting the fourth circuit breaker, thereby disconnecting the first bus from the second bus and connecting the first quick grounding switch to be in a closed grounding state. At the moment, the incoming line circuit and the outgoing line circuit of the main transformer are normally powered by the second bus, the first bus is in an uncharged state, the detachable conductor unit on the first bus is deflated, the inner conductor is reconnected, the first bus is conducted left and right, and the main transformer is covered, inflated and checked. And then, the first quick grounding switch is disconnected and grounded, the fourth circuit breaker is closed, and the first and second three-station isolation grounding switches are operated to enable the isolation switch to be in a closed state. At this time, the entire first bus bar is in a conductive charged state. And similarly, operating the second bus according to the steps to enable the whole second bus to be in a conductive charged state. And finally, operating a third station isolation grounding switch to enable the isolation switch to be in a closed state, operating the third isolation switch to be closed, operating a third breaker to be switched on, finishing the power transmission work of the standby outgoing line circuit at the moment, and finishing all the extension work. The whole long-term extension is completed under the condition that power failure does not exist on the outgoing line and the main transformer incoming line, the uninterrupted extension is realized in the true sense, and the loss caused by shutdown and production halt caused by power failure and the inconvenience caused to life are completely eliminated.

Claims

1. The utility model provides a GIS double bus does not have a power failure extension and uses detachable conductor unit, includes the barrel, its characterized in that: sealing elements are arranged at two ends of the cylinder, three connecting conductors which axially penetrate through the sealing elements are arranged on each sealing element, the positions of the connecting conductors at the two ends correspond to each other, and the outer ends of the connecting conductors are used for connecting buses; a probing hole is formed in the top of the cylinder body, and a detachable cover body is arranged on the probing hole; the position corresponding to the connecting conductor in the cylinder body is respectively provided with a pair of first conductor and second conductor, the left end of the first conductor is detachably connected with the connecting conductor on the sealing element at the left end of the cylinder body, the other end of the first conductor is detachably connected with the left end of the second conductor, and the right end of the second conductor is detachably connected with the connecting conductor on the sealing element at the right end of the cylinder body.

2. The GIS double-bus uninterrupted power extension detachable conductor unit according to claim 1, characterized in that: the inner end of a connecting conductor on the left end sealing element is provided with a contact, and the left end of the first conductor is inserted into the contact and connected with the connecting conductor.

3. The GIS double-bus uninterrupted power extension detachable conductor unit according to claim 1, characterized in that: the seal is a non-porous insulator.

4. The GIS double-bus uninterrupted power extension detachable conductor unit according to claim 1, characterized in that: and the connecting conductors on the same sealing element are arranged in a shape like a Chinese character 'pin' and are respectively connected with the circuits of the A phase, the B phase and the C phase.

5. A GIS double-bus uninterrupted power extension system comprises a first bus and a second bus, and is characterized in that a detachable conductor unit according to any one of claims 1-4 is arranged on each of the first bus and the second bus between a current period interval and a long-term extension interval.

6. The GIS double-bus uninterrupted power extension system according to claim 5, wherein a main incoming circuit, an outgoing circuit, a bus connection circuit and a bus voltage transformer circuit are arranged on the first bus and the second bus in the current period, and a standby outgoing circuit is arranged on the long-term extension circuit; the three-station isolating grounding switch is characterized in that a main transformer incoming circuit, an outgoing circuit and a standby outgoing circuit are respectively provided with a three-station isolating grounding switch, an isolating switch and a circuit breaker, one end of the three-station isolating grounding switch is connected with a first bus, one end of the isolating switch is connected with a second bus, and the other end of the three-station isolating grounding switch is connected with the incoming/outgoing circuit in series through the circuit breaker after being connected with the isolating switch in parallel; the first bus and the second bus are connected through a circuit breaker of the bus coupler; and a fast grounding switch is arranged on the bus voltage transformer circuit.