Nkhani - Ubwino wa Zinc Oxide Arresters ndi Ma Transformer Amakono Omangidwa

Ubwino wa Zinc Oxide Arresters ndi Built-in Current Transformers

Tsiku: 09-13-2021

1). Mavuto ndi chikhalidwezomangira zinki oxide.

1. Pali ngozi yobisika kuntchito
Pakadali pano,zomangira zinki oxidezimayikidwa pamodzi ndi zipangizo zowunikira, ndipo kapangidwe kake kakuwonetsedwa pachithunzi chili pansipa.

Pamenecholetsa zinki okusayidiIkagwira ntchito, mphamvu yotsalira idzapangidwa pa R1 mu chipangizo chowunikira. Voltage yotsalira yopangidwa ndi zipangizo zosiyanasiyana zowunikira idzakhala yosiyana, koma malinga ndi zomwe zili mu "AC Gapless Metal Oxide Lightning Arrester" (GB 11032), voltage yotsalira imatha kufika pa 3kV. Mwanjira ina, malo olowera a chipangizo chowunikira adzakhala ndi voltage yotsalira mpaka 3kV pamene chowumacho chikugwira ntchito. Voltage yotsalira iyi idzayikidwa pa voltage yotsalira pambuyo poti chowumacho cha zinc oxide chayatsidwa, zomwe zimawonjezera mphamvu yonse yotsalira ya chowumacho cha zinc oxide, chomwe chimakhala ndi zotsatira zoyipa pakuletsa bwino overvoltage. Mwachitsanzo,choletsa mpheziPa malo osinthira magetsi okhala ndi voteji ya 10kV, yokhala ndi voteji yotulutsa ya 5kA, voteji yotsalira ya mphezi ya mphezi ndi 27kV. Ngati voteji yotsalira ya 3kV ya chipangizo chowunikira yayikidwa pamwamba, voteji yotsalira yonse ya chomangira magetsi idzafika 30kV, ndipo voteji yotsalira idzawonjezeka ndi 11.1%, zomwe zidzasintha kwambiri mawonekedwe a chomangira magetsi ndikufooketsa mphamvu ya chomangira magetsi yoletsa overvoltage.

Pofuna kuthandiza ogwira ntchito kuyang'ana ndikulemba deta,choletsa zinki okusayidiChipangizo chowunikira nthawi zambiri chimayikidwa pamalo pafupifupi 1.8m kuchokera pansi. Ngati pali mphamvu yayikulu ya 3kV polowera chipangizo chowunikira, padzakhala chiopsezo chachikulu cha chitetezo pa ntchitoyo.

2. Pali zoopsa zobisika pa kudalirika kwa ntchito

Kulumikizana kwa njira zachikhalidwecholetsa zinki okusayidindipo chipangizo chozindikira chikuwonetsedwa pa Chithunzi 1 pansipa. Pakati pawo, maziko otetezera kutentha, waya, ndi chipangizo chowunikira zonse ndi zida zowonjezera zoyezera kuchuluka kwa madzi otuluka a zinc oxide arrester pansi pa mphamvu yogwirira ntchito. Zipangizozi sizofunikira pakugwira ntchito kwabwinobwino kwa zinc oxide arrester yokha. Kuwonjezera zida izi zowonjezera kumawonjezera mwayi wa zolakwika za zida. Mosasamala kanthu kuti ndi zida ziti zomwe zili ndi vuto, zingayambitse kuti arrester asiye kugwira ntchito ndikukhudza kukhazikika kwa magwiridwe antchito a zida. Mwachitsanzo, pantchito yeniyeni, maziko otetezera kutentha nthawi zambiri amakhala ndi mavuto a chinyezi, kutenthetsa kosazolowereka kapena kuwonongeka, zomwe zingakhudze ntchito ndi kuyang'anira kwa arrester.

Malinga ndi ziwerengero za pa intaneti, pakati pa zolakwika zazikulu komanso zofunika kwambiri za zinc oxide arrester m'chaka china, panali zolakwika 21 m'thupi, mafunde osazolowereka 110, kutchinjiriza kwakunja kosazolowereka 13, maziko osazolowereka 1 (flange), ma conductor osazolowereka 8, ndi mavuto 10 a mzere wotulutsira madzi. Chipangizo chowunikira chinali chosazolowereka nthawi 183. Zikuoneka kuti zida zowonjezera zidzakhudza kwambiri ntchito yokhazikika ya arrester. Deta ina ya ziwerengero ikuwonetsa kuti zolakwika 2,509 zinachitika mu arrester mphezi ya 110 (66) kV ndi kupitirira apo m'chaka china, zomwe zolakwika za arrester chifukwa cha muyeso wosazolowereka wamagetsi zinali 31.79% ya chiwerengero chonse cha zolakwika, ndipo zolakwika za zida zowunikira zinali 52.89%.

2) Ubwino wa zinc oxide arrester yokhala ndi transformer yamagetsi yomangidwa mkati

1. Pa chogwirira ntchito cha zinc oxide chokhala ndi transformer yamagetsi yomangidwa mkati, maziko oteteza ndi waya zimachotsedwa munjira yokhazikitsa, ndipo flange yotsika imalumikizidwa mwachindunji ku netiweki yapansi kudzera pa down conductor, monga momwe zasonyezedwera pa Chithunzi 2 pamwambapa. Dongosolo lozungulira lamagetsi otayikira ndi lotulutsa mphamvu limachepetsa zida zowunikira. Izi zimachotsa kuwonjezeka kwa mphamvu yonse yotsalira ya chogwirira ntchito chifukwa cha superposition ya mphamvu yotsalira ya chipangizo chowunikira, komanso kuwonjezeka kwa mphamvu yonse yotsalira ya chogwirira ntchito chifukwa cha superposition ya mphamvu yochotsera gap yomwe imayambitsidwa ndi open circuit ya ground loop.

2. Popeza mphamvu yotulutsira madzi ya chogwirira ntchito imatengedwa kuchokera ku transformer yamagetsi, sipadzakhala mphamvu yamagetsi yapamwamba pamalo pomwe pali mita yowunikira mphamvu yotulutsira madzi yomwe yayikidwa pamalopo panthawi yogwira ntchito ya chogwirira ntchito, zomwe sizikuopsezanso chitetezo cha ogwiritsa ntchito. Potero, chitetezo cha ntchito ya chogwirira ntchito cha zinc oxide chikhoza kukonzedwa bwino.

3. Chifukwa cha kuchepa kwa zigawo zina monga maziko otetezera kutentha, mawaya, ndi zina zotero, vuto loti choletsa zinc oxide chimakakamizika kuyima chifukwa cha zolakwika za zigawo zina panthawi yogwira ntchito lidzachepa kwambiri.

4. Chipangizo chowunikira chokha sichimalumikizidwanso ndi dera lamagetsi amphamvu. Ngati chipangizo chowunikira chalephera ndipo chikufunika kusinthidwa, chomangira sichiyenera kuzimitsidwa. Potero, kudalirika kwa ntchito ya chomangira cha zinc oxide kumatha kuwongoleredwa bwino.

Nkhani zokhudzana nazo

Ubwino wa Zinc Oxide Arresters ndi Built-in Current Transformers

Ubwino wa Zinc Oxide Arresters ndi Built-in Current Transformers

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