JP2006340574A - Method and device for assembling gas-insulated switchgear - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To construct the assembling method of a gas-insulated switchgear with which the assembling operation and test operation of the gas-insulated switchgear are carried out in succession, and the operation rate of equipment is improved. <P>SOLUTION: The gas-insulated switchgear has a constitution, wherein a main bus is separated into each connection part of a branch unit, making the separated main bus connected to the branch unit an assembling unit. When a plurality of the assembling units are arranged in parallel and connected to each other, the separated main bus is connected. The entire operation amount for the assembling/test operation of the assembling unit is divided into an operation unit for making the operation amount per unit period a single operation unit, and a space capable of setting the operation area for each operation unit as the assembling space of the gas-insulated switchgear is secured. The assembling operation and the test operation of the gas-insulated switchgear carries out the assembling operation and the test operation corresponding to each operation area, and a moving means repeats the operation for moving the assembling unit in each operation area to the next operation area, respectively for every unit period, as the assembling method for carrying out the assembling and test of one assembling unit per unit period. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a gas insulated switchgear assembling method and a gas insulated switchgear assembling apparatus installed as a substation facility of a substation or power plant.

For example, when installed in a substation, a gas-insulated switchgear installed as a substation facility in a substation or power plant includes a main bus, a transmission line unit connected to the transmission line, and a transformer connected to the transformer. It consists of branch units such as units.
In the branch unit, the disconnector, breaker, and disconnector are connected in series from the main bus side, and a connection part that is connected to the transmission line or transformer is provided. A ground switch or the like is provided at the connection portion of the circuit breaker, a voltage transformer or a lightning arrester is provided at a necessary portion, and an operation box containing an operation circuit for each unit is provided at each branch unit.
Most of the main bus part is a double bus structure, and the part connected to the main bus of each branch unit has two disconnectors connected in parallel to the circuit breaker, and each disconnector is a double bus. It is the structure connected to each.

  When manufacturing a gas-insulated switchgear configured in this way at the factory, each device that constitutes a gas-insulated switchgear such as a circuit breaker, disconnector, current transformer, voltage transformer, and lightning arrester has been Assembling, a total assembly is performed with a plurality of branch units such as a power transmission line unit and a transformer unit connected to the main bus, and a withstand voltage test is performed by attaching a test bushing for a withstand voltage test.

As described above, the method of performing the test by performing the total assembly with the plurality of branch units connected to the main bus has an advantage that the withstand voltage test can be performed collectively in a state close to the local installation state.
However, a large space is required for assembly and testing, and the test equipment is stopped during the assembly, and the assembly work is stopped during the test. The rate is low. In addition, when a problem occurs during assembly, there is a problem that the entire process is delayed in order to eliminate the defective part.

The present invention relates to a method for assembling a gas-insulated switchgear and an apparatus for assembling the gas-insulated switchgear so as to improve the efficiency of work space and the required space during assembly and testing of the gas-insulated switchgear.
As a prior art for realizing the efficiency improvement of the work space of large electric equipment and the improvement of the work efficiency, there is, for example, a “Large electric equipment line production process” disclosed in Patent Document 1.
This patent document 1 is intended for a transformer as a large electric device, and this production method is in a state where the required number of days in each of the conventional internal assembly process, external assembly process, and test process is different. Items are divided into 1-day tact in each process, the work position of each tact is set, and each process is transported by a dedicated transport device.
In this line production method, in a process that cannot be separated into 1-day tact, such as a drying process and an oil impregnation process, a plurality of facilities are installed in parallel and set to flow at 1-day tact. ing.

Japanese Patent Laid-Open No. 06-163292

In the assembly method of the gas insulated switchgear, each device such as circuit breaker, disconnector, current transformer, voltage transformer, lightning arrester, etc. constituting the device is individually assembled, and the transmission line unit, transformer unit, etc. In the production system in which operation tests, withstand voltage tests, etc. are performed after total assembly combining branch units, a large work space is required for assembly and testing, and this space is occupied during assembly and testing. Since the test cannot be performed during the assembly, and the assembly cannot be performed during the test, there is a problem that the working efficiency is low and the operation rate of the equipment is lowered.
In addition, when a problem occurs during assembly, there is a problem in that the entire process is delayed in order to eliminate the defect part.
Further, referring to the idea of “Linearized flow production method for large-sized electrical equipment” disclosed in Patent Document 1, even if gas insulation switchgear is performed in flow production for each production unit or delivery unit, Since the main bus part is connected to branch units such as power transmission line units and transformer units, and the basic part of each unit is configured for each unit, movement with multiple branch units connected to the main bus line It is difficult to apply the flow production method for each production unit like the flow production method disclosed in Patent Document 1.

  The present invention has been made to solve the above-mentioned problems, and can assemble and test a gas insulated switchgear continuously, and can improve the operating rate of equipment. And it aims at providing the assembly apparatus of a gas insulated switchgear.

  In the method for assembling a gas insulated switchgear according to the present invention, the main bus of the gas insulated switchgear is separated for each connecting portion of the branch unit, and the state where the separated main bus and the branch unit are connected is the assembly unit. When the plurality of assembly units are arranged in parallel and connected, the separated main bus is connected, and the total work amount of the assembly unit and the test work of the assembly unit is defined as the work amount per unit period. As the assembly space for the gas insulated switchgear, the work area for each work unit in the withstand voltage test work area for conducting the final withstand voltage test from the assembly start work area to start assembly is arranged in series. The area that can be set is secured, the work area for each work unit is set according to the work procedure, and each assembly unit in each work area is assigned to the assembly space. Equipped with moving means to move to each next work area, gas assembly switchgear assembly work and test work, gas insulation switchgear components are put into the assembly start work area, assembly work in each work area The test operation is executed in parallel, and the assembly unit and the test operation for moving the assembly unit of each work area to the next work area by the moving means are repeated for each unit period, and one assembly unit is assembled per unit period. The assembly method of the gas insulated switchgear for completing the test.

By separating the main bus of the gas insulated switchgear for each connecting part of the branch unit and connecting the separated main bus and the branch unit, even if the assembly unit is assembled for each unit, Tests including busbars are possible, the assembly space is set as one assembly unit, the total work volume of the test work is set as the work volume per unit period, and the work area is set for each work unit. By moving the work space of the assembly unit for each work unit, work can be performed in parallel in all work areas, and the work period of assembly and testing can be greatly shortened.
Further, when a failure occurs during the assembly or the test, the assembly unit in which the failure has occurred can be easily lined out, and the influence on the entire process is reduced.

Embodiment 1 FIG.
Gas-insulated switchgear installed as substations in substations and power plants is composed of branch units such as main buses, power transmission line units connected to power transmission lines, transformer units connected to transformers, etc. The unit has a configuration in which a disconnector, a circuit breaker, and a disconnector are connected in series from the main bus side, and a connection portion connected to a power transmission line or a transformer is provided.
The gas insulated switchgear generally has a configuration in which a branch unit is T-branched and connected to a main bus.

Further, the withstand voltage performance of the gas insulated switchgear needs to be verified in a state where the main bus and each branch unit are combined.
For the gas insulated switchgear having such a configuration, in order to assemble each unit and perform a withstand voltage test in a state including the main bus, the main bus is divided for each branch unit to which the main bus is connected. In order to allow easy connection when the main bus sections of each branch unit are combined, the connection section of the bus conductors of each split section is connected by a sliding contact etc., including the main bus section section divided from the branch unit The withstand voltage performance of the branch unit including the main bus can be verified by performing the withstand voltage test in the assembled unit state.
The assembly unit including the divided main busbars can be easily connected by providing a tank portion connecting the divided main busbars with an extendable bellows if necessary.

  The assembly method for assembling and testing every unit is divided into a plurality of work units, where the total work amount of the assembly work and test work of one assembly unit per unit period, for example, the work amount per day is one work unit. In the assembly space, a work area is set for each divided work unit, and assembly work and test work are moved to the next work area for each assembly unit in the work area each time one work unit is completed. And sequentially assembling.

  FIG. 1 is a plan view of an assembly space in which a main bus portion of a gas insulated switchgear is divided for each branch unit to be connected, and an assembly unit in which the main bus portion divided into the branch units is assembled is assembled. This assembly space is provided with assembly facilities / tools, test facilities, and the like necessary for each work in each work area. Hereinafter, a state in which each work area of the assembly space is provided with assembly equipment / tools, test equipment, and the like necessary for each work is referred to as an assembly device of a gas insulated switchgear.

FIG. 2 is a block diagram showing an example of an assembly unit of a gas insulated switchgear for assembling a unit, where (a) is a plan view and (b) is a side view. The configuration of FIG. 2 shows a state in which a double-bus main bus is divided into branch units and incorporated in the branch unit.
In the configuration of the gas insulated switchgear shown in FIG. 2, the circuit breaker 1 is mounted on the base 10a, and the two disconnectors 3a on the main bus side are connected to the main bus side of the circuit breaker 1 via the connecting portion 2. 3b and the main buses 4a and 4b divided for each branch unit are connected to each other, the current transformer 6 on the line side (or transformer side) of the circuit breaker 1 and the upper part of the current transformer 6 The line-side disconnector 5 (or the transformer-side disconnector) is connected, and the connection portion 7 that accommodates the cable head connected to the power transmission line side (or the transformer side) is connected. The connection portion 7 in FIG. 2 may be connected to a power transmission line by attaching an aerial bushing, but is shown in the case of connecting with a cable.

In Fig. 1, the assembly space of the required area is secured, the work amount per unit period of the total work amount of assembly and test is divided into one work unit, and the work area is set for each work unit along the flow of assembly. In the assembly space, moving passages 15 are provided on both sides in the assembly flow direction, and moving means 30 for moving the assembly unit 10 (10a, 10b, 10c, 10d) being assembled is provided in the moving passage 15. Yes. In addition, although not shown in the drawings, equipment required in each work area, for example, dry air generator for preventing oxygen deficiency during work in the tank, vacuum exhaust equipment for evacuating the tank, gas for filling or recovering insulating gas A processing device or the like is disposed, and the open / close test facility 12 is disposed at a predetermined position.
In addition, problems occurred during the assembly of the breaker 1, the disconnectors 3a, 3b, 5 and the assembled main buses 4a, 4b, the current transformer 6, the connecting portion 7, etc. In some cases, a portal crane 40 is installed to eliminate defective parts.

  Two moving means 30 for moving the assembly unit to the work area of the next process are arranged on rails installed in the movement passage 15 provided on both sides of the assembly space. As shown in FIG. 3, the frame 33 is attached to a carriage 31 to which a wheel 32 is attached via a pair of link mechanisms 34, and is moved up and down by a floating cylinder 35. When the levitation cylinder 35 is moved upward in the position below the floor surface, the upper surface of the frame 33 protrudes above the floor surface, and the assembly unit 10 on the floor surface can be levitated and moved downward. When operated, it descends below the floor. The movable carriage 30 is moved by the chain 36 so that the two carriages move in synchronization.

  As shown in FIG. 1, the withstand voltage test apparatus 20 includes a test transformer 21, an impact voltage application bushing 22, a test circuit switching device 23, an application cable 24, and a phase switching device 25. ing. When using the withstand voltage test device configured in this way, the high voltage part is not exposed to the atmosphere except during the impact voltage test, so assembly work is also performed in parallel during the withstand voltage test other than during the impact voltage test. You can continue.

  The assembly method for assembling and testing each unit by the gas insulated switchgear assembling apparatus shown in FIG. 1 is based on the conditions of the assembly unit of the target gas insulated switchgear, and the total amount of assembly work and test work is reduced. Divide the work volume per unit period into multiple work units, and assemble the gas insulated switchgear assembly space from work area where assembly starts to work area from work area to final withstand voltage test work area. In the work area to be set and start the assembly work, the circuit breaker 1, the disconnectors 3 a, 3 b, 5, the divided main buses 4 a, 4 b, the current transformer 6, and the connection part 7 of the gas insulated switchgear are individually assembled. The assembly equipment and the like are loaded, the assembly work and the test work are executed in each work area, and the assembly unit in each work area is moved to the next work by the moving means 30 every unit period, for example, every day. Repeat the operation and to move to A, the assembly of one assembled unit per unit period, to complete the test.

As described above, when the gas insulated switchgear is assembled and tested for each assembly unit, the work can be performed in the entire work area, and the work period of the assembly and test can be greatly shortened.
Further, when a failure occurs during assembly or testing, the assembly unit in which the failure has occurred can be easily lined out, and the influence on the entire process can be reduced.

It is a top view of the assembly space which divides the work area of the assembly space of a gas insulated switchgear, and shows the state of a work area. It is a block diagram which shows an example of the assembly unit of a gas insulated switchgear. It is a block diagram of the moving means which moves an assembly unit to the work area of the next process.

Explanation of symbols

10a, 10b, 10c, 10d assembly unit, 12 open / close test facility,
15 moving path, 20 withstand voltage test equipment, 21 test transformer,
22 Bushing for applying impact voltage, 23 Test circuit switching device, 24 Application cable,
25 phase switching device, 30 moving means, 40 portal crane.

Claims (4)

An assembly method of a gas insulated switchgear comprising a main bus, and at least a bus-side disconnector and a circuit breaker connected in series, and one end of the circuit breaker is connected to a transmission line or a transformer. And
The gas-insulated switchgear has a configuration in which the main bus is separated for each connecting portion of the branch unit, and a state where the separated main bus and the branch unit are connected is an assembly unit, and a plurality of assembly units are arranged. A configuration in which the separated main buses are connected in parallel,
The total work amount of the assembly work and the test work of the assembly unit is divided into a plurality of work units with the work amount per unit period as one work unit,
As an assembly space for the gas insulated switchgear, the work area for each work unit of the withstand voltage test work area for performing the final withstand voltage test from the assembly start work area to start assembly is secured, Set the work area for each work unit according to the work procedure,
The assembly space is equipped with moving means for moving each assembly unit in each work area to the next work area,
The assembly work and test work of the gas insulated switchgear are carried out by putting the components of the gas insulated switchgear into the assembly work start area and executing the assembly work and test work in each work area in parallel. A gas characterized by repeating assembly work and test work for moving the assembly unit of each work area to the next work area by the moving means every time, and completing assembly and test of one assembly unit per unit period Insulating switchgear assembly method. An assembly device for a gas insulated switchgear comprising a main bus, and at least a bus-side disconnector and a circuit breaker connected in series, and one end of the circuit breaker is connected to a transmission line or a transformer. And
The gas-insulated switchgear has a configuration in which the main bus is separated for each connecting portion of the branch unit, and a state in which the separated main bus and the branch unit are connected is an assembly unit, and a plurality of assembly units are arranged. A configuration in which the separated main buses are connected in parallel,
The total work amount of the assembly work and the test work of the assembly unit is divided into a plurality of work units with the work amount per unit period as one work unit,
As an assembly space for the gas insulated switchgear, the work area for each work unit of the withstand voltage test work area for performing the final withstand voltage test from the assembly start work area to start assembly is secured, Set the work area for each work unit according to the work procedure,
The assembly space includes moving means for moving each assembly unit in each work area to the next work area,
An assembly apparatus for a gas-insulated switchgear, wherein each work area set in the assembly space includes equipment necessary for assembly work or test work. The moving means is provided with moving road surfaces at positions lower than the floor surface on both sides in the direction in which the assembly unit moves in the work areas set in the assembly space, and moves on the moving road surfaces on both sides. Two trolleys, and a floating frame provided on each trolley for levitation of the assembly unit on the floor surface, and the two trolleys in the next work area with the assembly unit levitated. 3. The gas insulated switchgear assembly apparatus according to claim 2, wherein the assembly is configured to move synchronously. The withstand voltage test apparatus installed in the withstand voltage test work area is composed of a test transformer and a voltage application portion, and the voltage application portion is configured to be connected to the assembly unit completed by an insulated cable. 4. An assembly apparatus for a gas insulated switchgear according to claim 2, wherein the gas insulated switchgear is assembled.

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