What is the GIS in power system
Three Gorges Left Bank GIS a total of 39 switches. Left a total of 8 units of power station and the Three Gorges to Wanzhou 1 line, the Three Gorges to Longquan 1 lines, 2 lines, Three Gorges to Longquan Three Gorges to Longquan 3 lines of four circuits? Left two power plant a total of 6 units and the Three Gorges to Jingzhou 1 lines, 2 lines, Three Gorges to Jingzhou Three Gorges to Jingzhou 3 line etc. three lines.Three Gorges left bank power plant using international bidding procurement, GIS by the internationally renowned manufacturer ABB in 1999, the successful supply installation. The utility model relates to a metal sealed off phase structure, the generator transformer adopts a unit connection, and the two unit wiring is combined into a switch unit which is connected with a joint unit to connect the 3 / 2 wiring. Bus segment, 3 / 2 wiring of the 7 strings, a series of double switch off. GIS net size of about 581.5 meters long, width of 15 meters.
GIS has the advantages of small footprint, high reliability, high security, maintenance workload is very small, the main parts of the maintenance interval of not less than 20 years.In the Three Gorges project, the left bank power station and the right bank power station has a 550 thousand volt GIS high voltage power distribution device. Left bank power station 550 thousand volt GIS and ancillary equipment in the upstream of the Deputy plant height of 93.6 meters GIS indoor. Main transformer and 500 thousand volt shunt reactor. GIS and the main transformer and shunt reactor with oil, six sulfur hexafluoride casing connection. Room GIS upper Deputy plant roof, layout of a GIS air, oil outlet pipe and open the trap, capacitor voltage transformer, lightning arrester, air outlet, six sulfur hexafluoride overhead line connected by the casing with these devices. GIS indoor type.Indoor GIS is hardly affected by atmospheric conditions. GIS overhaul cycle is generally 15 years or more, the Three Gorges power plant GIS main parts of the maintenance interval of not less than 20 years. And AIS or H - GIS, due to the impact of the external atmospheric conditions, the aging and damage speed, overhaul cycle is short and overhaul times.
Popularly speaking, GIS is often we can see the switch station, also known as high-voltage distribution device.There are three types of high voltage power distribution equipment: the first is the conventional air distribution equipment, referred to as AIS. The bus bar is exposed directly to the air, and the breaker can be provided with a porcelain column or a tank type. This type is used in Gezhouba Dam power plant.
Popularly speaking, GIS is often we can see the switch station, also known as high-voltage distribution device.There are three types of high voltage power distribution equipment: the first is the conventional air distribution equipment, referred to as AIS. The bus bar is exposed directly to the air, and the breaker can be provided with a porcelain column or a tank type. This type is used in Gezhouba Dam power plant.
