Hauv kev ua haujlwm txuas nrog lub grid ntawm high-voltagecov khoom siv hluav taws xob diesel, qhov laj thawj ntawm kev faib hluav taws xob reactive yog ncaj qha cuam tshuam nrog kev ruaj khov ntawm chav tsev, kev nyab xeeb ntawm lub zog hluav taws xob thiab lub neej ua haujlwm ntawm cov khoom siv. Raws li lub tuam txhab tsom mus rau kev ua haujlwm ntawm cov khoom siv hluav taws xob thiab kev saib xyuas thiab kev pabcuam kev siv tshuab, peb muab kev paub dhau los ntawm qhov chaw los tshuaj xyuas cov teeb meem tseem ceeb, cov teeb meem feem ntau thiab cov kev daws teeb meem ntawm kev faib hluav taws xob reactive rau cov khoom siv hluav taws xob siab (10.5kV / 6.3kV) diesel generator teeb tsa, muab cov ntaub ntawv siv tau rau cov neeg koom tes hauv kev lag luam.
I. Cov Ntsiab Cai Tseem Ceeb: Cov Chaw Tseem Ceeb rau Kev Faib Fais Fab Reactive
Piv nrog cov chav tsev qis-voltage, lub hauv paus logic ntawm kev faib hluav taws xob reactive rau grid-connected high voltagecov khoom siv hluav taws xob dieselyog tib yam, tab sis cov kev cai rau kev sib phim parameter thiab kev tiv thaiv rwb thaiv tsev yog nruj dua. Nws cov hauv paus ntsiab lus tuaj yeem muab faib ua peb lub ntsiab lus: AVR Droop sib xws, kev sib phim excitation reference, thiab kev tswj hwm tam sim no hauv qhov chaw. Thaum peb lub hauv paus ntsiab lus no raug ua txhaum, teeb meem xws li kev tsis sib npaug ntawm lub zog reactive, tam sim no ntau dhau, voltage oscillation, thiab txawm tias AVR device lossis unit overheating thiab tripping yuav tshwm sim, cuam tshuam loj heev rau kev ruaj khov ntawm lub grid-connected system.
Hauv cov ntsiab cai, lub zog reactive Q yog txiav txim siab los ntawm qhov tam sim no excitation thiab qhov voltage kawg, thiab ua tiav kev tswj hwm decoupled nrog lub zog nquag (tswj los ntawm tus tswv xeev). Thaum ib chav tsev ua haujlwm, qhov nce ntawm qhov tam sim no excitation yuav ua rau lub zog kawg nce ntxiv, uas ua rau lub zog reactive nce ntxiv thiab txo qhov fais fab; thaum ntau chav tsev txuas nrog grid, lub zog system yog tshwj xeeb, thiab txhua chav tsev yuav tsum faib lub zog reactive raws li Q-V droop yam ntxwv (droop). Cov mis tseem ceeb yog (qhov twg yog qhov chaw teeb tsa voltage tsis muaj load, yog tus coefficient droop, thiab yog lub zog reactive ntawm chav tsev nws tus kheej).
Peb yam tseem ceeb uas yuav tsum ua kom muaj kev sib txuas ntawm lub grid ruaj khov yog: txhua lub units yuav tsum tau teeb tsa nrog qhov poob qis zoo (, qhov ntau yam ib txwm muaj 2%–5%), thiab kev ua haujlwm ncaj qha uas tsis muaj qhov poob qis lossis poob qis raug txwv; cov coefficients poob qis ntawm txhua lub unit yuav tsum sib xws (tib lub nqes hav rau cov units uas muaj tib lub peev xwm, thiab sib phim hauv qhov sib piv rau lub peev xwm rau cov units uas muaj peev xwm sib txawv); lub zog hluav taws xob tsis muaj load yuav tsum tau calibrated tas li kom tsis txhob muaj cov hluav taws xob uas nyob hauv.
II. Cov Kev Nyuaj Siab Tshwj Xeeb thiab Cov Lus Qhia Txog Kev Pheej Hmoo rau Kev Sib Txuas Hluav Taws Xob Siab
Ntxiv rau cov teeb meem uas tshwm sim ntawm cov chav hluav taws xob qis, kev faib hluav taws xob reactive ntawm cov tshuab hluav taws xob diesel siab-voltage txuas nrog grid (10.5kV / 6.3kV) muaj cov teeb meem tshwj xeeb hauv qab no uas yuav tsum tau tsom mus rau:
1. Cov Kev Cai Nruj Rau Kev Rwb Thaiv thiab Kev Tiv Thaiv Hluav Taws Xob
Cov theem rwb thaiv tsev ntawm cov tshuab hluav taws xob siab, AVR cov khoom siv, PT (Potential Transformers), CT (Current Transformers) thiab cov xov hlau txuas yuav tsum phim qhov chaw muaj hluav taws xob siab; txwv tsis pub, teeb meem xws li creepage, rwb thaiv tsev tawg thiab cov khoom siv tsis ua haujlwm yuav tshwm sim. Nws yog ib qho tseem ceeb tshwj xeeb kom nco ntsoov tias qhov kev puas tsuaj ntawm lub zog reactive circulating tam sim no ntawm sab high-voltage yog ntau dua li ntawm sab qis-voltage. Cov hluav taws xob circulating ntau dhau yuav ua rau stator tam sim no nce thiab ua rau rwb thaiv tsev overheating, uas ua rau muaj qhov yuam kev loj xws li inter-turn luv luv circuit thiab winding burnout.
2. PT/CT Qhov Tseeb thiab Kev Txuas Hluav Taws Xob Tsis Tuaj Yeem Tsis quav ntsej
Qhov yuam kev hauv qhov piv txwv hloov pauv, polarity thiab theem sib lawv liag ntawm PT thiab CT yuav ua rau AVR sampling distortion, uas ua rau muaj kev tswj hwm kev txhawb siab, thiab thaum kawg ua rau muaj kev tsis sib npaug ntawm kev faib hluav taws xob reactive thiab voltage oscillation. Tib lub sijhawm, lub voj voog thib ob ntawm CT ntawm sab high-voltage raug txwv tsis pub qhib, txwv tsis pub nws yuav tsim ntau txhiab volts ntawm overvoltage, ncaj qha ua rau AVR thiab cov khoom siv tswj hwm circuit puas tsuaj.
3. AVR Droop Mismatch yog ib qho kev phom sij zais cia uas tshwm sim ntau
AVR droop coefficient mismatch yog qhov ua rau tsis sib npaug ntawm cov hluav taws xob reactive hauv kev sib txuas high-voltage grid: yog tias qhov sib txawv ntawm cov coefficients droop ntawm cov units ntawm tib lub peev xwm tshaj 0.5%, qhov yuam kev faib hluav taws xob reactive yuav tshaj 10%; yog tias cov units ntawm ntau lub peev xwm tsis teeb tsa cov coefficient droop hauv qhov sib piv rov qab rau lub peev xwm, chav loj yuav raug underloaded thiab chav me me yuav raug overloaded nrog reactive fais fab. Vim yog qhov loj dua excitation tam sim no ntawm cov units high-voltage, cov teeb meem circulating tam sim no thiab cov khoom siv cua sov teeb meem tshwm sim los ntawm droop mismatch yuav pom tseeb dua.
4. Qhov Sib Txawv ntawm Lub Tshuab Hluav Taws Xob thiab Kev Pheej Hmoo ntawm Kev Sib Txuas Grid nrog Lub Hwj Chim Hauv Lub Nroog
Yog tias brushless excitation thiab brushed excitation, theem sib xyaw excitation thiab controllable excitation tau sib xyaw ua ke hauv cov chav sib txuas nrog grid, nws yuav ua rau muaj cov yam ntxwv sab nraud tsis sib xws ntawm cov chav, ua rau muaj kev faib hluav taws xob reactive thiab tsis ruaj khov voltage; qhov sib txawv ntawm impedance ntawm cov windings excitation ntawm cov chav siab-voltage kuj tseem yuav ua rau tsis sib xws excitation tam sim no, uas ua rau muaj kev tsis sib npaug ntawm lub zog reactive. Tsis tas li ntawd, thaum grid-txuas nrog lub zog hauv nroog (lub zog loj grid, tsis yog-droop yam ntxwv), lubcov khoom siv hluav taws xob dieselyuav tsum tau teeb tsa nrog qhov poob qis zoo ntawm 3% -5%, txwv tsis pub nws yuav "rub tawm ntawm qhov sib npaug" los ntawm lub zog fais fab, ua rau muaj teeb meem xws li kev rov qab fais fab rov qab, AVR saturation thiab unit tripping; tsis txaus synchronization qhov tseeb ntawm voltage, zaus thiab theem ua ntej kev sib txuas grid kuj tseem yuav ua rau muaj kev cuam tshuam ntawm lub kaw lus excitation, ua rau muaj kev faib hluav taws xob tsis sib npaug.
III. Cov Teeb Meem Ua Rau Muaj Teeb Meem Thiab Cov Lus Qhia Txog Kev Kho Kom Sai Sai
Hauv kev ua haujlwm ntawm qhov chaw, cov teeb meem hauv qab no tuaj yeem siv los nrhiav cov teeb meem faib hluav taws xob sai thiab txhim kho kev daws teeb meem:
- Qhov Xwm Txheej 1: Ib chav tsev muaj lub zog loj reactive thiab lub zog qis (piv txwv li, 0.7), thaum lwm chav tsev muaj lub zog me reactive thiab lub zog siab (piv txwv li, 0.95) - Qhov ua rau tseem ceeb: AVR droop slope tsis sib xws thiab tsis sib npaug ntawm qhov tsis muaj voltage.
- Qhov Xwm Txheej 2: Kev hloov pauv hluav taws xob tas li thiab kev hloov pauv hluav taws xob rov qab los tom qab kev sib txuas ntawm lub network - Qhov ua rau tseem ceeb: Droop coefficient ze rau xoom (tsis muaj droop), negative droop, lossis lub kaw lus excitation tsis ruaj khov.
- Qhov Xwm Txheej 3: Kev ua yuam kev ntau zaus ntawm cov hloov hluav taws xob siab, qhov kub ntawm stator ntau dhau, thiab AVR overheating lub tswb ceeb toom - Qhov ua rau tseem ceeb: Lub zog reactive ntau dhau ntawm cov hluav taws xob circulating tam sim no, lub zog reactive overload ntawm ib chav tsev, lossis PT/CT tsis ua haujlwm.
- Qhov Xwm Txheej 4: Tom qab kev sib txuas ntawm lub network nrog lub zog hauv nroog, lub zog reactive ntawm lub tshuab hluav taws xob diesel yog qhov tsis zoo (nqus lub zog reactive) thiab qhov fais fab yog qhov ua rau - Qhov ua rau tseem ceeb: Qhov teeb tsa voltage ntawm lub tshuab hluav taws xob diesel qis dua qhov hluav taws xob ntawm lub network, qhov droop me dhau, lossis qhov kev txhawb siab tsis txaus.
IV. Cov Kev daws teeb meem hauv tsev
Lub hom phiaj ntawm qhov teeb meem ntawm kev faib hluav taws xob reactive rau cov khoom siv hluav taws xob diesel siab-txuas nrog grid-txuas, ua ke nrog kev paub dhau los ntawm qhov chaw, peb tuaj yeem pib los ntawm peb qhov ntev: kev sib txuas ua ntej-grid, kev sib txuas tom qab-grid zoo-tuning, thiab kev tswj hwm siab-voltage-tshwj xeeb kom ntseeg tau tias muaj kev faib hluav taws xob reactive tsim nyog thiab kev ua haujlwm ruaj khov.
1. Kev Sib Txuas Ua Ntej: Ua Kev Ntsuas Qhov Sib Xws ntawm Cov Qauv
Kev ntsuas qhov ntsuas ua ntej kev sib txuas ntawm lub grid yog lub hauv paus rau kev zam cov teeb meem kev faib hluav taws xob. Peb lub ntsiab lus tseem ceeb yuav tsum tau tsom mus rau: thawj, AVR droop setting. Tus coefficient droop ntawm cov units nrog tib lub peev xwm yog tswj ntawm 2% -5% (ib txwm 4%), thiab txhua units yog sib xws kiag li; rau cov units nrog sib txawv peev xwm, tus coefficient droop yog teeb tsa hauv inverse proportion rau lub peev xwm (). Piv txwv li, 1000kVA unit yog teeb tsa rau 4%, thiab 500kVA unit yog teeb tsa rau 8%. Qhov thib ob, tsis muaj-load voltage calibration. Lub secondary voltage ntawm PT ntawm sab high-voltage yog unified (piv txwv li, 100V), thiab qhov sib txawv ntawm AVR tsis muaj-load voltage yog tswj nyob rau hauv ± 0.5%. Qhov thib peb, PT / CT tshuaj xyuas. Xyuas seb qhov piv hloov pauv, polarity thiab theem sequence puas yog, xyuas kom meej tias grounding txhim khu kev qha ntawm lub voj voog thib ob, thiab txwv tsis pub CT secondary circuit qhib.
2. Kev Sib Txuas Tom Qab Grid: Kho Kom Zoo Rau Kev Faib Fais Fab Reactive
Tom qab kev sib txuas ntawm lub grid, yuav tsum ua raws li txoj cai ntawm "kev tswj lub zog ua ntej, tom qab ntawd kho lub zog reactive" kom maj mam ua kom zoo dua qhov kev faib tawm lub zog reactive: ua ntej, saib cov ntaub ntawv ntawm lub zog reactive, lub zog ntsuas thiab cov ntaub ntawv ntawm txhua lub unit; yog tias lub unit muaj lub zog reactive siab (lub zog tsawg), qhov kev txhawb nqa ntawm lub unit tuaj yeem txo qis (AVR qis dua tus nqi); yog tias lub zog reactive qis (lub zog siab), qhov kev txhawb nqa ntawm lub unit tuaj yeem nce ntxiv. Lub hom phiaj kawg yog kom paub txog kev faib tawm lub zog reactive raws li lub peev xwm, nrog rau qhov yuam kev faib tawm tswj tau hauv ± 10% (ua raws li GB / T 2820 tus qauv), qhov sib txawv ntawm voltage ≤ ± 5%, thiab lub zog tswj tau ntawm 0.8-0.9 lagging. Yog tias muaj xwm txheej tso cai, AVR automatic load distribution function (equalizing line/circulating current compensation) tuaj yeem qhib. Rau cov units high-voltage, DC equalizing lines (ntawm tib tus qauv) lossis reactive power droop control yog qhov zoo dua los txhim kho qhov tseeb ntawm kev hloov kho.
3. Kev Tswjfwm Tshwj Xeeb rau High-voltage: Txhim Kho Kev Tiv Thaiv thiab Kev Rwb Thaiv Tsev
Raws li cov yam ntxwv ntawm cov chav tsev siab-voltage, cov kev ntsuas ntxiv rau kev tswj hwm tam sim no thiab kev txhim kho rwb thaiv tsev yog qhov yuav tsum tau ua: nruab ib lub cuab yeej saib xyuas thiab tiv thaiv tam sim no ntawm sab siab-voltage, uas yuav paub txog lub tswb ceeb toom qeeb lossis tripping thaum tam sim no ntau dua li tus qauv (ntau dua 5% ntawm tam sim no ntsuas) kom tsis txhob muaj kev puas tsuaj rau cov khoom siv; cov voj voog siab-voltage excitation, AVR cov khoom siv thiab cov xov hlau txuas txais yuav qib rwb thaiv tsev F lossis siab dua, thiab kev ntsuas hluav taws xob tau ua tsis tu ncua kom kuaj xyuas cov kev phom sij zais cia rwb thaiv tsev raws sijhawm; cov tshuab hluav taws xob diesel siab-voltage ntawm tib qho chaw yuav tsum sim txais yuav tib hom kev txhawb nqa thiab AVR qauv kom tsis txhob muaj cov yam ntxwv sab nraud tsis sib xws los ntawm kev sib xyaw.
V. Cov Kev Txwv Txheem thiab Cov Lus Qhia Txog Kev Lag Luam
Raws li tus qauv hauv tebchaws GB/T 2820, kev faib hluav taws xob reactive ntawm cov khoom siv hluav taws xob diesel siab-txuas nrog grid-connected yuav tsum ua tau raws li cov kev txwv hauv qab no: qhov yuam kev faib hluav taws xob reactive, ≤ ± 10% rau cov chav ntawm tib lub peev xwm, ≤ ± 10% rau cov chav loj thiab ≤ ± 20% rau cov chav me me ntawm ntau lub peev xwm sib txawv; tus nqi tswj hluav taws xob (droop) raug tswj ntawm 2% - 5% (zoo droop), thiab kev ua haujlwm ncaj qha tsis muaj droop lossis tsis zoo droop raug txwv; circulating tam sim no ≤ 5% ntawm qhov ntsuas tam sim no, uas yuav tsum tau tswj hwm nruj me ntsis rau cov chav siab-voltage.
Ua ke nrog ntau xyoo ntawm kev paub txog kev lag luam, peb xav kom cov tuam txhab ua raws li cov ntsiab cai ntawm "kev ntsuas kev sib txuas ua ntej-grid, kev saib xyuas kev sib txuas tom qab-grid thiab kev saib xyuas tsis tu ncua" thaum cov khoom siv hluav taws xob diesel siab nyob rau hauv kev ua haujlwm txuas nrog grid: tsom mus rau kev ntsuas qhov coefficient droop, tsis muaj-load voltage thiab PT / CT parameters ua ntej kev sib txuas grid; saib xyuas lub sijhawm tiag tiag reactive fais fab faib, circulating tam sim no thiab cov khoom siv kub tom qab kev sib txuas grid; tsis tu ncua ntes thiab tswj lub kaw lus excitation thiab kev ua haujlwm rwb thaiv tsev kom tsis txhob muaj qhov tsis zoo ntsig txog kev faib hluav taws xob reactive los ntawm qhov chaw thiab xyuas kom meej tias lub tshuab thiab lub zog grid ua haujlwm ruaj khov.
Yog tias koj ntsib teeb meem tshwj xeeb hauv kev faib hluav taws xob ntawm cov tshuab hluav taws xob diesel uas txuas nrog grid, koj tuaj yeem tiv tauj peb pab neeg ua haujlwm, thiab peb yuav muab kev taw qhia thiab kev daws teeb meem ib leeg rau ib leeg.
Lub sijhawm tshaj tawm: Plaub Hlis-28-2026
