ImiGaqo yoMlinganiselo wokuKhuselwa kweJenereyitha

Iijenereyitha zobuchwephesha zibandakanya ulwazi oluninzi lobuchwephesha, kwaye enye yazo luvavanyo lokugquma kweejenereyitha. Namhlanje, ndiza kukwazisa ngovavanyo lwe-insulation yeejeneretha kunye nemiba efuna ukuqwalaselwa.

I-insulation ye-generator ihlukaniswe kwizinto ezimbini: i-stator insulation kunye ne-rotor insulation.

I-Stator Insulation

Indawo yokulinganisa i-stator insulation ikwikhabhinethi yokumisa i-generator neutral. I-stator insulation inokulinganiswa kuphela xa i-rotor ikwimeko emileyo okanye ethintelweyo, i-generator ihlawuliswa nge-hydrogen kuxinzelelo olulinganisiweyo, amanzi okupholisa i-stator afakwe ekusebenzeni, kwaye ukuqhutyelwa kwamanzi okupholisa kujikeleze i-0.2 μS / cm.

#1, indawo yokumisa i-generator neutral kufuneka ikhutshwe, kwaye i-PT trolley kufuneka ikhutshwe. Emva koko, i-1000V i-insulation resistance tester (megohmmeter) isetyenziselwa ukulinganisa. Kuthathwa njengento efanelekileyo xa ukufakwa phakathi kwesigaba kunye nomhlaba kungekho ngaphantsi kwe-1MΩ.

I-#2, iindawo zokumisa i-voltage transformers kwi-generator neutral kunye ne-excitation transformer neutral kufuneka ikhutshwe, kwaye i-PT trolley kufuneka ikhutshwe. Emva koko, i-2500V i-insulation resistance tester isetyenziselwa ukulinganisa. Ixesha lokusetyenziswa kwe-voltage yokulinganisa ngumzuzu we-1. Xa iqondo lokushisa lingaphantsi kwe-20 ℃, ukugquma phakathi kwesigaba kunye nomhlaba akufanele kube ngaphantsi kwe-0.5MΩ, kwaye isigaba ngasinye kufuneka silinganiswe kanye kwisigaba sesithathu se-parallel state. Ukuba ixabiso elilinganisiweyo lingaphantsi kwe-80% yexabiso elingentla okanye ukuhlukana kwamaxabiso e-insulation phakathi kwezigaba kukhulu kune-20%, i-insulation ayifanelekanga.

#3,#4,#5,isitshixo semela esezantsi sokungathathi hlangothi kwejenereyitha kufuneka sitsalwe ngaphandle, kunye netroli ye-PT kufuneka itsalwe ngaphandle. Emva koko, i-1000V i-insulation resistance tester isetyenziselwa ukulinganisa. Kuthathwa njengento efanelekileyo xa i-insulation phakathi kwesigaba kunye nomhlaba ayikho ngaphantsi kwe-0.8MΩ.

I-Rotor Insulation Measurement

KwiYunithi #1, sebenzisa i-500V insulation tester (megohmmeter). Ukumelana nokugquma komhlaba kufuneka kube kukhulu kune-20MΩ.

Umlinganiselo we-rotor insulation weYunithi #2 wenziwa ngabasebenzi bolondolozo. Kuyimfuneko ukuba ukuxhathisa ukugquma emhlabeni kukhulu kune-100MΩ kwi-20℃ kwaye inkulu kune-50MΩ kwi-30℃.

KwiYunithi #3, iYunithi #4 kunye neYunithi #5, sebenzisa i-500V yomvavanyi wokumelana nokugquma. Ukumelana nokugquma komhlaba kufuneka kube kukhulu kune-1MΩ.

ImiGaqo yoMlinganiselo wokuKhuselwa kweJenereyitha

I-1) Ngethuba lenkqubo yokutshintshwa kwegesi kunye novavanyo lokucima kunye nokucima i-generator-transformer unit switchs, kunqatshelwe ngokungqongqo ukulinganisa ukugquma kwazo zonke iindawo ze-generator.

I-2) Musa ukusebenzisa i-tester resistant tester ukulinganisa ukuchasana kwe-insulation yecandelo lokulawula kunye nezixhobo zombane zekhabhinethi yokulungisa. Ukuba umlinganiselo uyimfuneko, kufuneka uqhutywe ngabasebenzi abaqeqeshiweyo.

3) Xhuma i-wiring ye-megohmmeter yamanzi ngokuchanekileyo ukukhusela umonakalo kwi-megohmmeter yamanzi.

4) Umbhobho wokuqokelela wamanzi okupholisa i-stator (i-terminals 94, 95, 96) kufuneka isekelwe ngokuthembekileyo emva kokulinganisa.

5) Xa ulinganisa i-insulation ye-exciter rotor enkulu ye-Unit #1 kunye ne-Unit #2, ukutshintshwa kwe-insulation ye-insulation ye-rotor enkulu ye-exciter kufuneka itshintshelwe kwindawo (ukulinganisa kwi-Unit #2) (uvavanyo lweYunithi #1).

6) Xa ulinganisa i-rotor insulation ye-Generator #3 kunye ne-Generator #4, i-rotor grounding yokukhusela i-fuse kunye ne-rotor voltage isolation fuse kufuneka itsalwe ivuleke. Ngaphandle koko, i-fuse inokwenzeka ukuba ivuthe.

7) Ngaphambi kokulinganisa i-insulation ye-low-voltage side winding ye-excitation transformer, i-fuses ye-DC capacitor, i-transformer encedisayo kunye ne-synchronous transformer kwikhabhinethi yokulungisa kufuneka itsalwe ivuleke.

I-8) Xa ulinganisa i-insulation ye-generator-transformer unit, i-outlet disconnecting switch ye-transformer engundoqo kunye nokutshintsha kwesebe le-high-voltage service service transformer kufuneka ibe kwindawo evulekileyo, kwaye i-PT yokukhupha i-generator kufuneka ibe kwindawo enqanyuliwe.

9) Kuvunyelwe kuphela ukulinganisa i-insulation generator xa i-rotor ye-generator ikwimo emileyo okanye yokuthintela ukukhusela ukutshatyalaliswa kombane kubasebenzi okanye umonakalo kwi-megohmmeter yamanzi.

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