What are the requirements for the inlet window of the GIS room of the 110kv substation? 5

Strengthen the installation supervision during the construction of new GIS equipment, especially the on-site installation environment, internal conductive circuit connection, GIS internal cleaning, and treatment of the sealing surface of each air chamber, etc., to ensure good sealing and avoid leaving suspended particles or pollutants inside the GIS equipment. During the GIS equipment handover test and during operation, each test project should be carried out in strict accordance with the provisions of the Q GXD "Power Equipment Handover and Preventive Test Regulations". Strengthen the research on state early warning in the operation of GIS equipment, conduct in-depth research on SF6 component analysis tests, and explore the methods and means of preventive testing of GIS equipment with electricity.

Considering the factors of ease of use, ventilation and heat dissipation, waterproofing, etc., the design of semi-underground cable layer was adopted in the river transformer. The basement floor adopts two waterproofs of flexible and rigid, in which the reserved steel bar of the ground ring beam extends into the rigid waterproof layer to prevent the waterproofing failure caused by poor treatment of the construction joints. The exterior wall of the substation is below the outdoor floor, and it is paved with YX2603 waterproof membrane.

Because there are a large number of incoming and outgoing cable pipes on the outside of the cable layer, it is necessary to carry out reliable waterproof plugging after the cable is laid. In the whole indoor substation with overhead incoming lines, the civil engineering major reserves holes in the 10 kV and 110kV switch rooms according to the location provided by the electrical major. The periphery of the hole is provided with the channel steel frame and the plate reinforcement are welded firmly, and the plate reinforcement is still welded in the channel steel frame, and the open hole is no longer left when the concrete is poured and the ground is installed and paved.

In this way, the floor is not only guaranteed to be clean and tidy, but also the floor structure will not be damaged when the line entry mode is changed. In addition, in the structural design of the substation, the feasibility of using special-shaped columns can also be considered. This not only makes the substation more tidy and beautiful, but also further saves land.

35kv: When assembling the cabinet, do not hang things into it when the master tape is connected and cleaned inside, 110 and 220kv are slightly easier to do, the volume is large but the component interface is less than 35kv, but there are still the same internal cleanliness requirements when the interface is connected and cleaned and things are dropped in the air chamber. However, if you are the construction unit, the manufacturer generally guides and confirms every step of the site, which is very strict, and the probability of an accident is still very small.

However, please be sure to do a good job of checking the secondary terminals of PT and CT before debugging and powering on, relatively speaking, this is the most likely to cause accidents when powering on.

The upstairs is very professional, I'll study it, haha.

110kV GIS is a single busbar.

Or DU double bus wiring, generally a DAO loop an interval, bus PT an interval, double bus PT most of the two intervals, there are also individual is an interval general, arrester is generally external, if also use GIS, the same as PT. If it's a half-wiring, it depends on the design.

It means that although I am studying GIS, I still don't understand what I am asking...

GIS (Gas Insulated Substation) is the English abbreviation of gas insulated substation. In gas-insulated substations, most of the electrical equipment is directly or indirectly sealed in a pipe tree composed of metal pipes and casings, and no switches, lines and terminals are visible from the outside.

The inside of the pipe tree is all made of SF6 gas as the insulating medium, and all the high-voltage electrical components are sealed in the grounded metal cylinder. It is a high-voltage power distribution device composed of 7 kinds of high-voltage electrical appliances: circuit breaker, busbar, isolation switch, voltage transformer, current transformer, lightning arrester and bushing.

GIS gas-insulated metal-enclosed switchgear.

GIS stands for Geographic Information System.

The high-voltage enclosed electrical appliances produced in China are sulfur hexafluoride fully enclosed combined electrical appliances, referred to as GIS. It combines circuit breakers, isolation switches, load switches, current transformers, voltage transformers, lightning arresters, busbars, outlet bushings, cable connection devices, interval sink control cabinets, etc. together as required to form a high-voltage distribution device. Except for the control cabinet, the rest of the components are combined in the grounded metal shell, and the conductor is supported by an insulator poured with an insulating material such as epoxy resin, and filled with sulfur hexafluoride gas as the arc extinguishing medium for insulation and circuit breaker.

At present, the general 110kV and above substation inlet spacing is all used, compared with the conventional open electrical appliances, the power distribution device composed of it has the advantages of small footprint, reliable operation, long maintenance cycle, and not affected by the external environment. It is suitable for urban power grids, heavily polluted areas and substations with obvious economic value after reducing the land area.

The GIS system follows the unified standard system and interface specifications of the State Grid Corporation of China, and forms a power grid graphical management platform integrating geospatial information, power grid topology, power grid graphic images, power grid modeling, and power grid real-time information. It provides the best graphical information support platform for power transmission and transformation production, operation, planning and design.

The system provides layer management, transmission network display, simulated power outage range analysis, fault ranging GIS positioning analysis, and three-dimensional analysis of transmission network, which is conducive to users to accurately grasp the power grid structure and operation mode; Power grid modeling and transmission grid ledger management provide power grid graphics data and asset attribute data for the production line department, which is conducive to asset statistics and analysis. Rich and practical transmission thematic maps such as cross crossing diagrams, transmission three-line diagrams, transmission line phase diagrams, etc., provide accurate on-site data for production and operation; Powerful user rights management and user log management ensure the security and stability of power grid data.

The system can fully adapt to the multi-level management mode of provincial power companies, prefecture-level power supply companies, and district and county power supply companies to meet the requirements of power grid management at all levels.

If there is a power supply on the opposite side of the 220kV incoming line, the incoming line on the substation side should be set with PT, and if there is no power supply on the opposite side, the incoming line does not need to set PT. Because if there is no power on the opposite side, there is no signal to set the PT.

The incoming line should be a single-phase PT, and a single-phase incoming voltage signal should be provided to the self-throwing device

The function of the incoming line PT is used to indicate whether the superior substation has sent the power supply to the inlet end of the incoming switch of the station, and the function of the bus PT is used to indicate whether there is electricity on the bus, and the live parts monitored by the two are different.

Absolutely. Quite a few power plants of 110-500kvGIS are arranged on the ground floor.

Same as a normal 110 substation, except that some of the equipment on the 110kV high side is placed in SF6 gas. The footprint of the substation has become smaller.