Vector pawg ntawm transformer

 

(1) Txhais

Y kev twb kev txuas yog winding kev twb kev txuas ntawm ib tug transformer. Hauv qhov kev sib txuas no, ib qho kawg ntawm txhua qhov winding txuas nrog qhov nruab nrab ntawm qhov nruab nrab thiab lwm qhov kawg yog txuas nrog lub hwj huam mov lossis kev thauj khoom, yog li tsim lub hnub qub zoo li tus qauv.

 

 

(2) Kev sib xyaw:

• Ib tug Y-txuas transformer feem ntau muaj peb windings sib haum mus rau peb theem ntawm lub hwj chim mov (A, B, C).

• Ib qho kawg ntawm txhua qhov winding txuas nrog rau qhov nruab nrab (N) thiab lwm qhov kawg yog txuas rau kab theem (L1, L2, L3).

 

(3) Kev sib txuas hom:

• Cov ntsiab lus nruab nrab ntawm peb lub windings txuas nrog rau daim duab "Y".

• Cov theem ntawm peb-theem fais fab mov yog faib ntawm 120 degrees.

 

(4) Qhov zoo ntawm Y kev sib txuas

1. Neutral grounding:

• Y-kev sib txuas muab qhov tseeb nruab nrab taw tes uas tuaj yeem yooj yim hauv av los txhim kho kev nyab xeeb thiab ruaj khov ntawm lub cev.

• Cov av nruab nrab tuaj yeem tiv thaiv kev raug mob xws li xau thiab luv luv.

2. Txo harmonics:

• Nyob rau hauv cov ntaub ntawv ntawm peb-theem load ntsuas, Y tuaj yeem txo cov kev cuam tshuam ntawm kev sib raug zoo thiab txhim kho cov khoom siv hluav taws xob zoo.

3. Kho kom haum rau ntau yam kev thauj khoom:

• Y kev sib txuas yog tsim rau ntau hom kev thauj khoom, suav nrog cov kab tawm thiab cov khoom tsis muaj kab, thiab hloov tau zoo heev.

 

(5) Qhov tsis zoo ntawm Y kev sib txuas

1. Single-theem txhaum:

• Nyob rau hauv ib qho kev sib txuas Y, yog tias muaj ib qho kev ua txhaum ib theem (xws li luv luv Circuit Court), tam sim no yuav tsis sib npaug, uas yuav ua rau overload thiab hlawv lub cuab yeej.

2. Av txhaum:

• Kev tsim cov av nruab nrab yuav ua rau muaj qhov nce ntawm qhov tam sim no hauv av txhaum, ua rau lub cuab yeej puas.

3. Load imbalance:

• Yog tias cov khoom thauj tsis sib xws, nws yuav ua rau lub zog tsis ruaj khov ntawm cov theem, uas yuav ua rau muaj teeb meem tsis zoo.

 

(6) Lub hauv paus ntsiab lus ua haujlwm ntawm Y kev sib txuas

6.1 Theem voltage thiab kab voltage:

Txhais

Kab voltage / kab rau kab voltage

Kab voltage yog hais txog qhov voltage ntawm theem thiab theem nyob rau hauv peb-theem fais fab system, uas yog, qhov voltage ntawm ob theem kab (los yog nyob kab). Hauv peb-theem systems, nws feem ntau yog sau npe

Hom voltage ntawm transformer yog kab voltage, xws li 2500kVA 11/0.4kV

 

Phase Voltage

Phase voltage yog hais txog qhov voltage ntawm ob kawg ntawm txhua theem winding nyob rau hauv peb-theem fais fab system, feem ntau hais los ntawm

• Hauv Y-kev sib txuas, theem voltage (qhov voltage hauv txhua qhov winding) yog sib npaug rau 1 / zaus kab voltage (qhov voltage ntawm theem).

• Tus qauv qhia:  

= kab voltage

= theem voltage

 

 

 

6.2. Kev sib raug zoo tam sim no:

Lus txhais:

Kab tam sim no

Tam sim no ntws los ntawm ib theem kab (los yog kab nyob) nyob rau hauv peb-theem system, feem ntau yog sawv cev los ntawm.

Tam sim no nyob rau hauv lub transformer nameplate yog kab tam sim no

 

Phase Tam sim no

Hais txog qhov tam sim no ntws los ntawm ib theem winding

Nyob rau hauv ib qho kev sib txuas Y (lub hnub qub kev sib txuas), hais txog qhov tam sim no ntawm theem kab thiab qhov nruab nrab

Hauv kev sib txuas D (daim duab peb sab), nws hais txog qhov tam sim no hauv ib theem winding. Nws feem ntau yog sawv cev los ntawm

• Hauv Y-kev sib txuas, qhov tam sim no ntws los ntawm txhua qhov winding (phase tam sim no) sib npaug rau cov kab tam sim no:

• Tus qauv qhia:

= kab tam sim no

= theem tam sim no

 

 

 

 

(1) Txhais

D kev twb kev txuas yog ib hom winding kev twb kev txuas ntawm transformer. Hauv qhov kev sib txuas no, qhov kawg ntawm txhua qhov ntawm peb lub windings (los yog peb theem) txuas nrog rau qhov chaw pib ntawm lwm qhov winding, yog li tsim ib lub voj voos kaw, Delta hauv lus Askiv lossis cim los ntawm lub cim ∆

 

 

(2) Basic composition:

• AD kev twb kev txuas transformer feem ntau yog tsim los ntawm peb windings sib haum mus rau peb theem ntawm lub hwj chim mov (A, B, C).

• Qhov kawg ntawm peb lub windings yog txuas nyob rau hauv lem ua ib tug kaw daim duab peb sab qauv.

 

(3) Kev sib txuas hom:

• Hauv D-kev sib txuas, qhov kawg ntawm thawj theem (theem R) winding txuas nrog rau qhov pib ntawm theem thib ob (theem Y) winding, qhov kawg ntawm theem thib ob winding txuas nrog rau qhov pib ntawm theem thib peb winding. , thiab qhov kawg ntawm lub thib peb theem winding txuas nrog rov qab mus rau qhov pib ntawm thawj theem winding, tsim ib lub voj kaw.

 

(4) Qhov zoo ntawm D kev sib txuas

1. Txhim kho lub peev xwm luv luv:

• D kev sib txuas hom tuaj yeem muab lub peev xwm luv luv luv, haum rau lub sijhawm thauj khoom loj.

2. Qhov nruab nrab hauv av:

• D-connected transformer tsis muaj qhov nruab nrab, uas kuj txo cov teeb meem tshwm sim los ntawm cov av tsis zoo, thiab tsis muaj kev pheej hmoo ntawm qhov nruab nrab hauv av tsis ua haujlwm.

3. Haum rau siab load tej yam kev mob:

• Nws tuaj yeem tiv taus cov loads siab tam sim no, yog li nws muaj txiaj ntsig zoo hauv cov txheej txheem pib ntawm cov khoom lag luam loj thiab cov tshuab hluav taws xob.

4. Lub zog zoo:

• D kev sib txuas tuaj yeem cuam tshuam kev sib raug zoo thiab ua tau zoo nyob rau hauv cov neeg siv sijhawm nrog cov kev xav tau siab rau lub zog zoo.

 

(5) Qhov tsis zoo ntawm D kev sib txuas

1. Av tsis tso cai:

• Vim tias qhov kev sib txuas D tsis muaj qhov nruab nrab, nws tsis tuaj yeem ua haujlwm tau zoo, uas qee zaum tuaj yeem ua rau muaj kev phom sij.

2. Kev pheej hmoo ntawm kev thauj khoom tsis txaus:

• Yog hais tias lub load tsis sib npaug, nws yuav ua rau muaj qhov tsis sib xws hauv peb theem fais fab, uas ua rau muaj teeb meem tsis zoo ntawm lub zog.

3. Kev kho nyuaj:

• Nyob rau hauv cov nqe lus ntawm kev hloov load thiab kev tswj voltage, D kev twb kev txuas yog kuj nyuaj.

 

(6) Lub hauv paus ntsiab lus ua haujlwm ntawm D kev sib txuas

1. Voltage thiab tam sim no kev sib raug zoo:

Hauv kev sib txuas D, kab hluav taws xob ntawm peb theem yog sib npaug rau theem voltage ntawm txhua qhov winding (uas yog, qhov voltage ntawm ib theem tshwj xeeb).

Cov qauv qhia:

= kab voltage

= theem voltage

 

 

• Theem tam sim no ntawm txhua qhov winding yog 1/lub sij hawm kab tam sim no, uas yog:

• Tus qauv qhia:

= kab tam sim no

= theem tam sim no

 

 

2. Theem kev sib raug zoo:

• Qhov sib txawv ntawm cov theem hauv qhov kev sib txuas D yog 120 degrees, tib yam li hauv Y kev sib txuas, tab sis kev sib raug zoo ntawm theem tam sim no thiab theem voltage yog txawv ntawm qhov sib txuas Y.

 

 

(1) Txhais

Qhov nruab nrab ntawm qhov hloov pauv yog hais txog qhov sib txuas ntawm txhua theem winding hauv Y-kev sib txuas (lub hnub qub txuas) hom. Hauv qhov kev sib txuas no, ib qho kawg ntawm transformer yog txuas nrog ib qho nruab nrab ntawm qhov nruab nrab thiab lwm qhov kawg yog txuas nrog lub hwj huam mov lossis kev thauj khoom. Qhov nruab nrab point muab ib qho hluav taws xob grounding siv.

 

 

(2) Muaj nuj nqi

• Muab kev siv hauv av

Lub ntsiab lus nruab nrab tuaj yeem ua rau hauv av, muab qhov muaj peev xwm ruaj khov siv los xyuas kom muaj kev nyab xeeb ntawm lub zog hluav taws xob.

• Ntsuas voltage

Lub ntsiab lus nruab nrab pab kom sib npaug ntawm qhov hluav taws xob hauv peb-theem system, txo qhov cuam tshuam ntawm asymmetric voltage, thiab txhim kho cov khoom siv hluav taws xob zoo ntawm lub zog hluav taws xob.

• Kev tiv thaiv tsis ua haujlwm

Nyob rau hauv qhov kev tshwm sim ntawm ib theem av txhaum, qhov nruab nrab taw tes muab lub voj tam sim no uas pab tiv thaiv lub cuab yeej los xyuas thiab cais qhov txhaum thiab tsis txhob muaj kev puas tsuaj.

• Load ntsuas

Qhov nruab nrab taw tes tuaj yeem txuas nrog cov kab nruab nrab ntawm cov khoom thauj, pab kom ua tiav cov khoom sib npaug, tshwj xeeb tshaj yog nyob rau hauv cov ntaub ntawv ntawm asymmetric loads.

 

 

(1) Txhais

Pawg Vector ntawm lub transformer yog hais txog kev sib txuas ntawm hom kev sib txuas thiab theem kev sib raug zoo ntawm transformer windings, thiab yog sawv cev los ntawm kev sib xyaw ntawm cov tsiaj ntawv thiab cov lej, xws li Dyn11.

 

(2) Hom kev sawv cev ntawm pawg txuas

• Cov tsiaj ntawv loj

Qhia txog hom kev sib txuas tseem ceeb, piv txwv li, D, Y, thiab Z.

• Cov tsiaj ntawv me

Qhia txog hom kev sib txuas ntawm ob sab, piv txwv li, d, y, thiab z.

• Tus lej

Sawv cev rau theem sib txawv hauv units ntawm 30 degrees, xws li 0, 1, 2... 11.

• Piv txwv li, Dyn11

D txhais tau hais tias thawj sab yog kev sib txuas ntawm Delta, y txhais tau hais tias sab thib ob yog lub hnub qub kev sib txuas (wye), n txhais tau hais tias sab thib ob muaj qhov nruab nrab nruab nrab, thiab 11 txhais tau hais tias theem sib txawv yog 330 degrees (30 degrees lag. ).

 

(3) Cov pab pawg sib txuas

• Dyn11

Thawj sab yog D txuas, sab thib ob yog Y txuas nrog, thiab theem ob theem voltage yog 330 degrees ua ntej ntawm thawj sab voltage (uas yog, 30 degrees tom qab).

 

 

 

• YNyn0

Thawj sab yog txuas nrog Y, thiab sab thib ob txuas nrog Y, tsis muaj theem sib txawv.

 

 

 

• Dyn1

Thawj sab yog D txuas nrog, sab thib ob yog Y txuas nrog, thiab theem sib txawv ntawm sab siab siab thiab qis siab yog 30 degrees.