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Main transformer xoom-sequence tam sim no thiab qhov sib txawv tiv thaiv

Aug 20, 2024

Transformer zero-sequence tiv thaiv muaj nuj nqi thiab txoj kev

 

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Transformer zero sequence tiv thaiv:

 

Muaj nuj nqi:Raws li kev tiv thaiv thaub qab rau transformer lub ntsiab tiv thaiv thiab kev tiv thaiv thaub qab rau hauv av txhaum ntawm cov khoom nyob ib sab.
 
Hom:Nws muaj feem xyuam rau seb qhov nruab nrab ntawm lub transformer yog grounded;
 
Transformer ncaj qha grounding:Nws yog tsim los ntawm ob-theem zero-sequence overcurrent tiv thaiv, uas feem ntau ua nyob rau hauv ib tug luv luv lub sij hawm txwv kom txo tau qhov txhaum ntau yam thiab ua nyob rau hauv ib tug ntev lub sij hawm txwv rau disconnect lub Circuit Court breakers ntawm ob sab ntawm transformer.
 
Lub ntsiab lus nruab nrab tsis yog hauv av lossis tsis ncaj qha hauv av:
Rau cov ntaub ntawv ntawm ntau yam transformers khiav nyob rau hauv parallel, feem ntau, tsuas yog ib co transformers yog grounded nyob rau hauv nruab nrab point lag luam, thaum lub nruab nrab point ntawm lwm transformers tsis grounded. Thaum muaj teeb meem hauv av tshwm sim hauv lub tsheb npav los yog kab uas nyob ib sab thiab qhov kev tiv thaiv txhaum cai tsis kam ua haujlwm, qhov zero-sequence tiv thaiv tam sim no ntawm qhov nruab nrab point grounding transformer yuav ua haujlwm thiab qhov nruab nrab point grounding transformer yuav raug txiav tawm. Qhov nruab nrab point ungrounded transformer yuav ua rau overvoltage.
 
Raws li qib rwb thaiv tsev thiab grounding txoj kev ntawm lub transformer, kev tiv thaiv configuration yog raws li nram no:
Tag nrho cov insulated transformer:Lub rwb thaiv tsev theem ntawm tag nrho cov seem ntawm tag nrho insulated transformer winding yog tib yam. Thaum muaj teeb meem hauv av tshwm sim hauv qhov system, tag nrho insulated transformer nrog qhov nruab nrab qhov nruab nrab tsis grounded raug tso cai kom raug txiav; xoom-sequence tiv thaiv tam sim no tau teeb tsa rau kev ncaj qha hauv av ntawm qhov nruab nrab; xoom-sequence overvoltage tiv thaiv yog teeb tsa rau qhov tsis muaj qhov nruab nrab nruab nrab;
 

Qib insulation transformer:

 

Qhov rwb thaiv tsev theem ntawm txhua qhov ntawm qhov winding ntawm cov qib rwb thaiv tsev transformer yog txawv. Qhov ntsuas hluav taws xob ntawm qhov nruab nrab ntawm qhov nruab nrab yog qhov qis, yog li kev tiv thaiv tawm qhov sib txawv yuav tsum tau tiv thaiv kev tiv thaiv kev nyab xeeb ntawm qhov nruab nrab ntawm qhov hloov pauv nrog qhov tsis sib xws ntawm qhov nruab nrab. Zero-sequence tiv thaiv tam sim no tau teeb tsa rau kev ncaj qha hauv av ntawm qhov nruab nrab; Qhov sib txawv overcurrent tiv thaiv yog teeb tsa rau qhov tsis muaj qhov nruab nrab ntawm qhov nruab nrab.

 

 

Lub transformer xoom-sequence tiv thaiv tam sim no thiab kev tiv thaiv qhov sib txawv tuaj yeem muab tso rau hauv kev ua haujlwm tib lub sijhawm?

 

 

Transformer zero-sequence tiv thaiv tam sim no thiab kev tiv thaiv tsis tuaj yeem qhib rau tib lub sijhawm; lub transformer nruab nrab point xoom-sequence CT txuas nrog lub transformer nruab nrab point bushing qhov hluav taws xob; qhov sib txawv CT txuas rau pem hauv ntej ntawm qhov sib txawv tab sis tom qab xoom-sequence CT. Txawm hais tias qhov nruab nrab ntawm qhov tsis sib xws, qhov sib txawv ntawm qhov sib txawv ua rau qhov nruab nrab ntawm qhov nruab nrab xoom-ib ntus CT kom ntws tam sim no, thiab kev tiv thaiv xoom-sequence yuav qhib;

 

Zero-sequence overcurrent tiv thaiv tau qhib thaum lub kaw lus muaj qhov txhaum hauv av thaum lub ntsiab lus nruab nrab yog ncaj qha hauv av, thiab kev tiv thaiv qhov sib txawv yog qhib thaum lub ntsiab lus nruab nrab yog grounded los ntawm qhov sib txawv thaum lub kaw lus muaj qhov txhaum hauv av thiab qhov nruab nrab taw tes overvoltage tawg. qhov paug tawm. Lub zero-sequence tiv thaiv tam sim no yog qhov loj, thaum qhov chaw tiv thaiv qhov sib txawv yog tsawg. Yog li ntawd, qhov sib txawv ntawm kev tiv thaiv yuav tsum tau tawm thaum lub hauv paus riam hloov mus kaw.

 

Yog xav paub ntxiv txog kev ntsuas kev ntsuas transformer, thov nyemTransformer Test Solutions.
Txhawm rau kom tau txais cov khoom lag luam, thov nyemTiv tauj peb.

 
 
 
Koj Tseem Yuav Zoo Li