Misalai GIS?
Takaitaccen GIS
GIS na nufin Gas Insulated Switchgear, wanda ake fassara da takaitaccen gas fully enclosed combination appliance, kafin yana amfani da SF6 gas a matsayin takaitar. Yana haɗa da circuit breaker (CB), isolation switch (DS), ground switch (ES, FES), BUS (BUS), current transformer (CT), voltage transformer (VT), lightning arrester (LA) da wasu abubuwa masu tsari mai yawa. A gaban yanzu, an samun abubuwan GIS a kan darajarren tsari daga 72.5 kV zuwa 1200 kV.
Kasuwanci na abubuwan GIS
Saboda kyakkyawan takaitar, kyakkyawan ido da hanyoyin da ke cikin gas SF6, abubuwan GIS suna da muhimmanci masu inganci, kyakkyawan ido da kyakkyawar. Amma, takaitar da ke cikin gas SF6 yana ba da damar da adadin electric field, da kuma yake iya shafi daidai a cikin GIS idan akwai tushen ko abubuwan gargajiya.
Abubuwan GIS suna amfani da takamaima mai kusa, wanda ya ba da muhimmanci masu inganci, babbar abubuwan da ba su yi shiga yankin, karamin yanayin da ba su zama, karamin yanayin da ba su zama, da kuma karfiyar da ba su zama. Amma, akwai mafi girman yanayin da ba su zama da kuma karfiyar da ba su zama, da kuma idan takamaima ta shiga da yankin, zai iya ba da damar da yawan ranar da mutane suka shiga da kuma yanayin da ba su zama.
Takamaima na cikin abubuwan GIS
Lambobin da ke cikin GIS ana haɗa da wasu abubuwa. Idan ake ƙunshi hanyoyin da suke yi, zan iya ƙunshi: fixed contact (zai iya kiran electrical contact da screws kamar fasteners, wanda ake kira fixed contact, da kuma fixed contact bai yi lafiya ne a cikin hanyoyin. Kamar kungiyar da ke cikin contact da basin, etc.), contact contact (electrical contact da zai iya koyar a cikin hanyoyin, kuma ake kira separable contact), sliding and rolling contact (a cikin hanyoyin, contacts zai iya slide ko roll, amma electrical contact da ba zai iya koyar ne, wanda ake kira sliding and rolling contact. Contact na tsakiyar switchgear ita ce wadannan electrical contact).
Amfani
Substation na GIS
Sulfur hexafluoride closed combination electrical appliances, a nan International "Gas insulated Switchgear" (Gas lnsulated Switchgear) ake kira GIS, ita ce substation da aka fi sanya da transformer a primary equipment, da kuma circuit breaker, isolation switch, ground switch, voltage transformer, current transformer, lightning arrester, bus, cable terminal, inlet and outlet line bushing, optimized design organically combined into a whole. Da kuma GIS, akwai HGIS, wanda ake kira da hanyoyin da ba su zama, saboda bus da ke cikin GIS ita ce kadan, da kuma karfiyar da ba su zama, da kuma lightning arrester, musamman bus, ita ce da ake amfani da shi a cikin hanyoyin da ba su zama.
Muhimmanci
Miniaturization: SF6 gas da kyakkyawan takaitar yana amfani da shi a matsayin insulation and arc extinguishing medium, wanda ya haifar da ingancin substation.
High reliability: babban abubuwan da suka shiga yankin suke samun inert SF6 gas, wanda ya haifar da kyakkyawar substation.
Good safety: babban abubuwan da suka shiga yankin suke samun grounded metal housing, don haka bai zama da damar da suka shiga yankin. SF6 gas bai zama da damar da suka shiga yankin, don haka bai zama da damar da suka shiga yankin.
Eliminate adverse effects on the outside: babban abubuwan da suka shiga yankin suke samun metal shell, shielding electromagnetic and static electricity, low noise, strong anti-radio interference ability.
Short installation cycle: Realization of miniaturization makes the whole machine assembly and test qualified in the factory, can be shipped to the site in the form of units or intervals, so it can shorten the site installation period, but also improve reliability.
Easy maintenance, short maintenance time: because of its reasonable structure layout and advanced arc extinguishing system, it greatly improves the service life of the product, so the maintenance cycle is long, the maintenance workload is small, and because of miniaturization, low from the ground, it is convenient for daily maintenance.
Sort
GIS can be divided into outdoor type and indoor type according to the installation location.
GIS can generally be divided into two forms: single-phase single-cylinder and three-phase common cylinder. The 110kV voltage level and the bus bar can be made into a three-phase common cylinder type, and a single-phase single cylinder type is used for 220kV and above.
Operating principle
In normal cases, the circuit breaker and isolation switch of the GIS device are mainly operated in the remote area. The circuit breaker and isolation switch are enabled in the remote/local area to focus on the remote location.
The ground switch of a GIS device can be operated only in the local area. When you operate the ground switch, switch the switchblade/ground knife to the remote/local area.
In any case, only the program operation can be carried out, the "interlock release switch" on the wire control cabinet must be in the "interlock" position, and its unlock key and the computer anti-misunderstanding lock key are sealed together and used in accordance with the same provisions
Operational requirement
Indoor SF6 equipment room frequently entered by operators: ventilation at least once per shift for 15 minutes, the air exchange volume should be greater than 3-5 times the air volume, and the air outlet should be installed in the lower part of the room; Equipment places that are not frequented by operators: ventilate for 15 minutes before entering.
For the parts easily touched by operation and maintenance personnel, under normal circumstances, the induced voltage on the shell and frame should not exceed 36V.
Temperature rise: the part easily touched by the operator should not exceed 30K; The part easily touched by the operator but not touched during operation should not exceed 40K; Individual parts not easily accessible by the operator should not exceed 65K.
SF6 switchgear inspection, at least once a day, unattended substation inspection according to regulations. During the inspection, the main inspection is to check the appearance, whether the equipment is abnormal, and make a record.
