Elk Products
ELK-04-type SF6 gas-insulated metal-enclosed engineering applications, SF6 insulated switchgear – Electrical Industry
Summary: Introduction ELK-04-type SF6 gas-insulated metal-enclosed in Zhuhai PTA110kV transformer substation engineering applications, design, installation and commissioning process experience and practice should be aware of some problems.
Keywords: SF6 gas insulated switchgear, the structure of the building blocks, design modules, engineering applications
SF6 gas insulated switchgear (GIS) take up less space, purchase cloth compact and high reliability. In the concentrated charge of electricity in areas that require high reliability is affordable, good overall efficiency technology options. GIS Type ELK-04 is rated ABBCalorEmagSchaltanlagenAG German factory 145kV voltage, maximum operating voltage of 170kV, 110kV voltage applied to China's level of SF6 gas insulated metal-enclosed. GIS Type ELK-04 is the technology a more mature company ABB products, high reliability, since 1969 has been the experience of thousands of long-term interval. Since it began in December 1999 ABB Xiamen Huadian pressure switch high Co., Ltd. in the national assembly and manufacture, commissioning and testing. Zhuhai PTA110kV substation project, as project conditions and circumstances of the actual use of such equipment.
One Substation Project Description is located in Zhuhai City, Province Guangdong PTA110kV Ohira Bay West Road, Zhuhai City, Zhuhai City, in the Bi Yang Chemical Co., a major electrical substation users. The substation 110 kV overhead lines through two new access networks. Bus Terminal 110 kV double. The first phase installation of 3 sets of 110 kV double-winding Transformer, 9 sets aside a further expansion of 110 kV double transformer liquidation possibilities. finally able to reach the 2 new 110 kV line, and 12 pairs of the transformer primary winding scale construction. Main Transformer Low Side and chemical plants and high voltage area of the substation connections 6kV motor, power supply to the load of the plant.
2110 kV power distribution unit design ideas
Due to the chemical plant the importance of high reliability requirements, while a larger number of output circuit of the substation, which uses a pair of bus terminals. Insulated 110 kV SF6 gas power distribution devices used metal-enclosed, the design of the house. Current projects for the construction of six intervals, stretching fixed composition of the mother's side of the interval (a), output line spacing (2), output range of the transformer (3). Starting line the output of the isolating transformer are cord and plug intervals. The last interval of the bus section of gas output isolation and expansion of the joint connector insulators with locking lids closed for expansion along that direction, extending the process of reducing impact on the operation to a minimum.
GIS ELK-04-based are the main technical parameters: Rated voltage 145kV, rated current 2500A, rated short circuit breaking 40kA, for a short time withstand current 40kA (3s), rated peak withstand current 100kA.
The house of 110 kV switch inside the track, taking into account the turning radius cable of 110 kV large mass of unit length, pulling the building, and other factors, will be installed on the GIS layer, a layer of reserve for the cable layer, making for the convenience of cable. GIS standards for each interval spacing of 1200 mm, 110 kV cable exit holes in the required width of the plant is not less than 700 mm, the design civil engineering beam width should be limited to 500 mm, and the escape hole location of the cable. When the local control cabinet near the available bus the range of vertical length 4600mm, considering a reasonable distance of space and maintenance work, the desire to ensure the clear distance between walls is greater than 9000mm. This easy to run the operation, installation and maintenance, while the larger teams, such as collection devices SF6, equipment high voltage test, etc., can be mobile and flexible design.
3ELK-04 structure-type and technical characteristics of GIS
3.1ELK-04-based GIS for the phase of tube type structure
Bus isolation switch / ground switch combined speed switches and transformers grounding current, voltage transformers, etc. are all enclosed in the same three phases cylindrical container. Agreement saving compact material.
3.2 enclosure aluminum alloy materials, casting molding
aluminum alloy resistant to corrosion, high strength, can adapt to different conditions environmental. Material and Steel compared to only one third of very low density and quality. Reduce the number of load capacity, ease of installation and maintenance and review, on the role of the foundation and floor load is small, can reduce investment in civil engineering. More importantly, aluminum materials no magnetic iron, can effectively prevent the induction current generation will not result in a heating device hysteresis loss situation. GIS in various parts of the ridge is used to connect Bolt should also be used non-ferrous magnetic stainless steel bolts, bolts instead of replaced.
3.3 Building blocks structure module design
Flange specifications of each module can be freely combined anyway standardized modules simplify the design of equipment, easy and flexible configuration, installation and shorten the construction cycle. Modules topics are as follows.
(1) circuit breaker. Only fracture, type switch oneself, the ability to break, energy and small operation the switch. Circuit Breaker Selection HMB-1 type storage Spring hydraulic operation, small size and high reliability. Removal can all replacement and easy maintenance. Breaker reliability, the long operating time, the number of circuit breaker operation without maintenance are: degradation of the rated current 10000; 31.5kA short circuit breaking current of 30 times, to break 40kA short circuit current 20 times.
(2) Insulation / earth switch combination. It is both the insulation and ground circuit switching offer a combination of switch, there are three positions: the isolation switch connected position, the off position, the location of the grounding switch connected. Isolation / earthing switch combinations can have each a rotation stage in the form of knife contact, and two static ports: isolation switch and grounding switch static static contact. With position indicator electric actuator through oblique and Insulated gear driven blades spin axis to select the contact's workplace. As the only place that work between March 1, essentially the same position to avoid the grounding switch is loaded when closing misuse.
(Switch 3) ground speed. Operating Mechanism for the spring mechanism of electrical power storage. Can be installed on the outlet side of the line as the line side of the grounding switch can also be installed in the bus as a bus ground switch. Rated short-circuit failure the short circuit current of 100 kA end (peak), is able to operate without maintenance 2.
(4) Current transformer and voltage transformer. Stand-alone power transformer and circuit About the Author
I am China Manufacturers writer, reports some information about frp sheet , glass reinforced polyester.
Kelly Carter of Elk Products @ Freescale Technology Forum (FTF)
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