TIET KitM NANG LI/0NG Q Giai pliap SIJI dung nang iildng tiieu qua cac dgng cd dien xoay chieu dung cong ngiiiep Trjnh Van Hung D dng CO dien l i thiet bj dien co hpc giiip chuyen dien ning co ning Co ning duoc sif dung de, quay banh cdng t i c cua bom, quat hoac quat day, chay m i y nen, nang vat lieu, Cac ddng co dien duoc sii dung dan dung (may xay, khoan, quat gid) va cdng nghiep Ddi ddng co dien dupe gpi la "siic ngua"ciia nganh cdng nghiep vi ude tfnh, ddng co sii dung khoing 70% ciia toan bd tai dien nganh cdng nghiep Chinh vi vay viec tim giii phap de ning cao hieu qua Slf dung cac ddng co se cd y nghTa to Idn viec tiet kiem dien ning, giam g i i sin pham va t i n g tinh canh tranh ciia doanh nghiep I Ton that dong co ctlen xoay chieu Cd loai ddng co thudng diing cdng nghiep: ddng CO ddng bp (DB) va ddng co khdng ddng bd (KDB) Ddng co KDB la ddng co thdng dung nhit, duoc sif dung cho cac thiet bj khic cdng nghiep Sd di loai ddng ca niy thdng dung nhU v i y la vi chiing cd thiet ke ddn giin, re tien v i de bao tri, cd the ndi tnic tiep vdi ngudn xoay chieu pha Tdn that cd the thay ddi t i i 2%20% Bang cho tha'y cac loai tdn that d mdt ddng co khdng ddng bd (KDB) Bang Cac loai tdn that dDCKDB TTJ 2» 38 5S~ 425 Sbo Motor Rating (kVW) Hinh So sanh giOfa dpng co hieu suat cao va dong ccf chuan - Lao hda: ddng co mdi hoat ddng hieu q u i hon - Cdng suit Vdi phan Idn cac thiet bj, hieu suit ciia ddng CO tang lam viec d cdng suat djnh miic Tdc dp Cac ddng co tdc dp cao hon thudng hieu qua hon - Loai Vf du nhU, ddng co Idng sde thudng hieu q u i hon ddng co cd vanh trUOt - Nhiet dp Dpng co cd quat lam mat hieu q u i hon so vdi ddng cd cd Idp bio ve chdng am (SPDP) - Quan lai ddng ca cd the lam giim hieu suit Loai ton that Phan tram ton that toan phan (100%) Ton that co djnh hoac ton that loi thep 25 Ton that bien doi: ton that stato 34 Ton that bien doi: ton that roto 21 Tdn that ma sat va quan lai 15 Tdn that ccf khf cCia dpng cd Trong q u i trinh lam viec, de giim tdn that va hieu q u i lam viec ciia ddng co thi viec ning cao hieu suit cho ddng co ddng vai trd quan trpng Hieu suit ciia ddng co duoc xic djnh bdi tdn that ben chi cd the giim bang each thay ddi thiet ke ddng co va dieu kien van hinh Hieu suit ciia ddng co cd the djnh nghia la "ty sd ciia cdng suit dau hiifu dung ciia ddng co vdi cdng suit d i u toan phan." Cic yeu td i n h hudng den hieu suit ciia ddng cd bao gdm: -Tii ddng cO, dUpc md ta nhU sau: GiCfa hieu suit va t i i ciia ddng co cd mdi lien he rd rang vdi Cic nha sin xuit thiet ke ddng co van hanh d miic t i i 50-100% va hieu qua nhat d miic t i i 75% Nhung t i i giim xudng dUdi miic 50%, hieu suit se giim rat nhanh Van hanh ddng co dudi 50% miic t i i cung cd tic ddng tUOng tii, nhUng nhe hon ddi vdi he sd cdng suit Hieu suit ciia ddng co cao va he sd cdng suit g i n bang l i miic van hinh hieu q u i mong mudn v i giiip giim chi phf ciia toan bd day chuyen chii khdng chi rieng vdi ddng co Vi ly tren, dinh gia ket q u i hoat ddng cua mdt ddng co, cin xac djnh c i t i i v i hieu suit hau het cic nude, cac nha sin xuit phii ghi rd hieu suit day t i i tren phin ghi cic thdng sd (nhin) ciia ddng cd Tuy nhien, vdi mdt ddng cd van hanh mdt thdi gian dai, thudng rit khd xic djnh hieu suit vi phan nhin miy ciia ddng co bj mat di hoac bj son de len tren De hieu suit ciia ddng co, cin ngit t i i va dem ddng cd den bd phin kiem tra de thiic hien mdt sd kiem tra Ket q u i ciia nhiing lan kiem tra duoc so sinh vdi thdng sd hoat ddng chuan cua ddng co nha sin xuit cung cap Trong trUdng hop khdng the ngit ddng co khdi Dien A Dth' sdhg23 E] TIET KIEM NANG Ll/GfNG tai, cd the liy gia trj tUOng ddi ve hieu suit b i n g cung cap cic gia trj tuong ddi cua hieu suit ddng co 2.2 Giam mufe non tai (va tranh siir dung ddng co qua Idfn) Cac g\i\ phap nang cao hieu suat va giam tdn that dong cor KDB Nhu d i giii thfch d p h i n 3, non t i i se lam t i n g tdn t h i t , g i i m hieu suit va he sd cdng suit cua ddng co Non t i i cd the la nguyen n h i n phd bien nhit khien ddng co hoat ddng khdng hieu qua, vi mdt sd ly sau: 2.1 Thay dong cof tieu chuan bang dong cof hieu suat cao Ddng co hieu suit cao duoc thie't ke chuyen dung de t i n g hieu suit hoat ddng so vdi ddng cd tieu chuan Cic cai tien thiet ke t i p trung vao viec lam g i i m tdn that ben ddng co, bao gdm viec sir dung thep silic cd tdn that sat tlf t h i p hon, Idi dai hon (de t i n g chat kich hoat), d i y day hdn (de g i i m trd khing), l i thep mdng hon, khoing trdng khdng khf giufa stato va rdto nhd hdn, sCr dung ddng thay cho cic nhdm rdto, cic vdng dem tdt hdn va quat nhd hon Ddng co hieu suit cao cd d i i cdng suit thie't ke va miic day tai rdng Hieu suit cao hdn ddng CO tieu chuan tif 3% tdi 7% nhU cho hinh Bang dUa cac giii phap cii tien thudng dUpfc sif dung thiet ke ddng cd hieu suit cao Do phii thuc hien cac giai phap cii thien hoat ddng ciia ddng co, chi phf cua ddng co hieu suit cao cao hon chi phf cCia ddng co tieu chuin Phan chi phi cao hon se duoc hoan vdn r i t nhanh nhd g i i m chi phf van hanh, nhat la vdi cac ling dung mdi hoac thay the cic ddng cd het thdi han Slf dung NhUng thay the cic ddng cd dang dung ma chUa het thdi gian sir dung bang cac ddng co hieu suit cao khdng p h i i liic nao cung k h i thi ve mat tai chfnh, va vi viy, chiing tdi de xuat chi thay nhufng ddng co n i y bang ddng CO hieu suit cao nhufng ddng co hdng Bang NhCfng khu viTc nang cao hieu suat of dong CO hieu suat cao Khu vUc tdn that dien Sat tlf Nang cao hieu suat - Sii dung thep t i m mdng hon vi tdn t h i t Idi sat t h i p hon se giiip g i i m tdn that ddng xoiy - Ldi dai hdn se c i n sii dung nhieu thep hdn thiet ke, lam giam tdn that nhd g i i m mat dp tCf thdng sinh Stato I^R - SCf dung bd dan Idn hdn bang ddng giiip t i n g dien tich tiet dien ciia cic cudn d i y stato Nhd v i y lam giam trd khing (R) ciia cudn d i y va g i i m tdn t h i t cudng dp ddng dien (1) Rdto I^R - Dung nhufng dan rdto Idn hdn de t i n g tiet dien, nhd v i y g i i m trd khing dan (R) va tdn that cUdng dp ddng (1) Ma sat va - Slf dung thiet ke quat tdn t h i t t h i p giam quin d i y tdn t h i t chuyen djch khdng 5.Tdn that rd - SCr dung thiet ke tdi Uu v i quy trinh kiem soit chit luong chat che de g i i m thieu tdn that rd 24 Dien & Ddi sdhg - Nha sin x u i t thiet bj cd xu hudng sCr dung he sd an t o i n (he sd d i i truf cdng suit) Idn hon chon ddng co -Thiet bj thudng dUcrc suf dung non tai Vidu nhu cac nha san xuat m i y cdng cu dUa hieu suat djnh miic cua ddng CO cho mufe day t i i Tren thiic te, ngudi sCr dung rit ft can mufe cdng suit 100%, dan den viec thiet bj van hanh d miic non t i i p h i n Idn thdi gian - Nhufng ddng cd Idn hdn dUdc liia ehpn de giiip tri dau d mufe mong mudn ke c i dien i p dau vao thap mdt cich bat thudng - Nhufng dpng co Idn dUOc lUa ehpn cho nhufng iing dung c i n md men khdi ddng cao nhUng nhufng ddng CO nhd hon duoc thiet ke cho md men cao cd the phu hop hon Nen Ilia chon ky cdng suit cua ddng co diia tren danh gia chi tiet ve mufe t i i NhUng thay mdt ddng co qua Idn bang mdt ddng cd khac nhd hon, cung can phii tfnh den hieu suit tiem nang dat dUpfc Nhufng ddng co Idn hon vdn cd hieu suit thiet ke cao hon ddng co nhd hdn Vi viy, nhin chung chung tdi khdng de xuat thay the dpng cd hoat ddng d miic 60 - 70% cdng suit hoac cao hon Mat khic, khdng cd nguyen t i e cufng nhac viec liia ehpn ddng CO va can danh g i i tiem ning tiet kiem diia tren tifng trudng hop Vi du nhU, neu mdt ddng co nhd hdn la ddng CO hieu suit cao va ddng co dang dung khdng phii la ddng co hieu suit cao, thi cd the cii thien hieu suit Neu nhufng ddng co ludn hoat dpng d mufe tai dudi 40% cdng suit thiet ke, cd the i p dung mdt phUdng phap hieu q u i v i khdng tdn kem la dau Viec thay ddi tii kieu dau tam giac tieu chuan sang dau chi gdm viec d i u lai d i y tai hop dau diy Van hinh d dang ndi se lam g i i m dien i p theo he sd'V3' dang ndi sao, ddng cd se g i i m cdng suit, nhUng nhufng die tinh lam viec nhU ham cCia t i i se khdng thay ddi Vi viy, ddng co ndi se cd hieu suit va he sd cdng suit cao hdn hoat ddng d mufe day t i i so vdi hoat ddng d mufe khdng diy tai theo ndi tam giic Tuy nhien, van hanh ddng cO ndi chi cd the Slf dung cho cic ufng dung vdi yeu ciu ty sd md men/ tdc dp t h i p t i i giam Ngoii ra, nen trinh chuyen sang ndi neu ddng co duoc ndi vdi thiet bi sin xuit cd sin luong phu thudc v i o tdc dp cua ddng cd (vi tdc dp ciia ddng CO g i i m ndi sao) Vdi nhOng thiet bj cin md men ban d i u cao va yeu cau md men hoat ddng thap, cd the sCf dung bd khdi ddng Y/ D de cd the d i p ufng dUdc yeu cau md men ban d i u cao 2.3 Chon cong suat dong co cho tiii thay ddi Cac ddng cO cdng nghiep thudng hoat dpng d nhiifng dieu kien t i i thay ddi cic yeu c i u cCia qua trinh Mdt TIET KIEM NANG LI/0NG Q kinh nghiem thiic te tinh hudng la lifa ehpn ddng CO diia tren mufe tai cao nhit NhUng nhU viy thi sCf dung ddng co se tdn kem hon vi nd chi hoat ddng d cdng suit tdi da nhufng giai doan ngan, va se cd nguy co ddng co bj non t i i Mdt Ilia ehpn khic la ehpn cdng suit cua ddng co diia tren dd thi t i i cua mdt thiet bj cu the Dieu niy cd nghia la cdng suit ddng co dupc ehpn thap hon mdt chut so vdi mufe t i i cao nhit v i ddng co cd the bj qua t i i mpt thdi gian ngan Cd the i p dung each niy vi nha sin x u i t thiet ke ddng cd vdi mot he sd q u i t i i (thudng la cao hon t i i djnh mufe la 15%) de d i m b i o viec thing thoing ddng CO hoat ddng qua t i i se khdng gay nhifng hdng hdc d i n g ke Nguy co Idn nhit la viec ddng co bj qua nhiet, dieu se i n h hUdng den tudi thp va hieu suit cCia ddng co, tang chi phi van hanh Mdt tieu chf liia ehpn cdng suit ciia ddng co la sifting nhiet dp trung binh tfnh theo trpng sd chu ky lam viec thiic te khdng dUpc cao hon miic tang nhiet dp van hanh d che dp d i y t i i lien tuc (100%) Qua nhiet cd the xay nhifng trudng hcfp sau: -Thay ddi Idn ve t i i , nhU thudng xuyen tat/bit hoac t i i ban dau cao Thudng xuyen v i / h o i c bj qua t i i mdt thdi gian dai - Khi nang lam mat ddng co bj han che, vf du nhU d dp cao Idn, mdi trudng ndng hoac ddng co bj bao kin hoac b i m ban Khi t i i ddng co thay ddi nhieu mdt thdi gian, cd the sir dung phuong phap dieu khien tdc dp ciing vdi viec ehpn cdng suit ddng co thich hop 2.4 Nang cao chat li/tfng dien Hieu suit ciia ddng cd thudng bj i n h hUdng nhieu bdi chat lupfng ciia dien dau vio Chat lupng dien d i u vao dien i p thiic te va tan sd so vdi gia trj djnh miifc quyet djnh Slf dao ddng ve dien ap va tan sd qua mufe so vdi gia trj cho phep cd t i c ddng d i n g ke den hieu suat cua ddng CO Bing neu len nhufng i n h hudng chung sii dao ddng cua dien i p va t i n sd ddi vdi hoat ddng cua ddng Cd Slf m i t c i n bang dien i p cd the i n h hudng nhieu den hieu suit cua ddng co, x i y cac pha ciia ddng co ba pha khdng c i n bang Dieu niy thudng xiy dien i p c i p cho cic pha khic Cung cd the la kfch thudc d i y d he thdng p h i n phdi khac Vf du ve t i c ddng cua mat can b i n g dien i p ddi vdi hieu suit cua ddng cd cho b i n g Oien i p ciia mdi pha he thdng ba pha phii can bing, ddi xufng v i chenh 120° Cin tri cin b i n g pha khoing 1% de trinh lam hdng ddng co va khdng duoc b i o hinh bdi n h i sin xuit Mdt sd yeu td cd the i n h hUdng den c i n b i n g dien i p : t i i mdt pha chi lay d mdt pha, kfch thudc d i y c i p khic nhau, hoac sif cd mach SU m i t c i n b i n g n i y se lam t i n g tdn t h i t he thdng va g i i m hieu suit ddng co 2.5 Quan lai Mdt v i n de phd bien cac doanh nghiep cdng nghiep l i quin lai cic ddng co bj chay Sd luong cac ddng CO quin lai d mdt sd doanh nghiep chiem hon 50% toan bd ddng co Cung cd quan lai can t h i n se giup tri hieu suit ciia ddng cd d miifc nhu trudc nhung phan Idn la quan lai lam giam hieu suit Quin lai cd the i n h hUdng den mdt sd yeu td dan den giim hieu suit ciia ddng co: quin khdng dung thiet ke va bien dang ranh, lam giam k h i nang each dien v i tang nhiet dp ddng co qua miifc cho phep Chang han, gia nhiet de bdc cac day quin cu, vat lieu cich dien cd the bj hu hai, lam tang tdn t h i t ddng dien xoiy Mdi thay ddi d khoang trdng khf giOa rdto va stato cd the i n h hUdng den he sd cdng suit va md men d i u Tuy nhien, neu thifc hien cac bien phip thfch hpp, cd the tri hieu suit ciia ddng co sau quan lai, va mdt sd trudng hpp cd the cai thien hieu suit nhd thay ddi thiet ke quin Sif dung d i y vdi tiet dien Idn hon, kfch thudc ranh quin thfch hpp se giup giim tdn t h i t stato v i t i n g hieu suit Tuy nhien, nen tri thiet ke ban dau ciia ddng CO quan lai, trif cd ly die biet lien quan den tai can thiet ke lai Cd the de dang danh gia t i c ddng ciia viec quan lai vdi hieu suit va he sd cdng suit cua ddng co neu biet duoc tdn that khdng tai ciia ddng cotrUdc va sau quan lai Thdng tin ve tdn that khdng tai va tdc dp khdng tai cd the tim dMc tai lieu gidi thieu ve ddng co mua Mdt chi sd cho mufe dp cdng quan lai la so sanh giUa ddng dien khdng tai va trd khang ciia stato d mdi pha ciia ddng coquan lai vdi ddng khdng t i i va trd khing ciia stato ban dau vdi cung miifc dien ap Khi quan lai ddng CO, can lUu y den cac yeu td sau: Chon hing dugc cap chiifng nhan ISO 9000 hoac hing la dai dien ciia Hiep hdi djch vu ve dien (Electrical Apparatus Service Association) - Ddng co cd cdng suit nhd hon 40 HP v i d i sir dung dUdc hon 15 nam (nhit l i nhUng ddng co d i dUOc quan lai) thudng cd hieu suit thap hon nhieu so vdi loai ddng cd hieu suit cao hien dang cd tren thj trUdng Tdt nhit la nen thay Va tdt nhit la nen thay nhiing ddng cO khdng chuyen dung cd cdng suit nhd hon 15 HP - Neu chi phf quin lai vUOt q u i 50% - 65% so vdi g i i cua mdt ddng co hieu suit cao mdi, nen mua ddng co mdi Dp tin cay va hieu suit cao hon se nhanh chdng bii lai phan g i i chenh hon 2.6 Dieu chinh he sd cdng suat bing each lap tu bu Nhu d i lUu y d tren, DCKDB cd die tfnh l i he sd cdng suit nhd hon 1, dan tdi hieu suit toin phin thap hon (vi chi phf van hinh tdng cao hon) ciia he thdng dien nha miy Tu bu d i u song song vdi ddng cd dupe sif dung de ning cao he sd cdng suitTu bu khdng giiip ting he sd cdng suit ciia b i n thin ddng co ma giiip ting he sd cdng suit cua he thdng phit dan dien Lpi fch ciia viec dieu chinh he sd cdng suit bao gdm giim cdng suit phin khing v i cdng Dien A Ddi sdhg 25 E] TIET KIEM NANG Ll/tfNG suit bieu kien (va nhd v i y giim tien dien cho nhu cau sif dung), g i i m tdn t h i t nhiet I^R tieu hao tren d i y dan trudc tu bu (nhd vay g i i m chi phf sif dung ning lUdng), g i i m sut i p tren dudng d i y (nhd v i y giiip dieu chinh dien ip) v i t i n g hieu suit toan phan ciia toan bd he thdng dien Kfch cd ciia tu bu phu thudc vao cdng suit phan khing khdng t i i ddng co Kich thudc ciia tu bii khdng nen vUpt qua 90% cdng suit p h i n khing khdng t i i ciia ddng CO vi nhufng tu bu Idn hon se dan den dien i p cao lam chiy dpng co Chi cd the xic djnh duoc kVAR ciia ddng cd nhd kiem tra khdng tai ciia ddng co Mdt cich khic l i sir dung he sd cdng suit dien hinh d cac ddng co tieu chuin de xic djnh kich cd ciia tu bu 2.7 Tang cUdng bao tri Phan Idn cac Idi ciia ddng co duoc lam bang thep silic hoac thep cin ngudi cacbon t h i p , cic die tinh ve dien khdng thay ddi d i n g ke theo thdi gian Tuy nhien, b i o tri kem cd the lam g i i m hieu suit ddng co theo thdi gian v i dan den hoat ddng khdng tin cay ciia ddng cd Vi du nhU bdi tron khdng thfch hdp se lam tang ma sit d c i ddng CO va thiet bj truyen dpng Ma sat t i n g lam t i n g nhiet dp ddng CO, dan den tdn t h i t l i m t i n g trd khang ddng CO Dieu kien mdi trUdng xung quanh cung cd anh hudng tdi hieu suit cua dpng co Vf du nhu nhiet dp q u i cao, q u i nhieu bui, mdi trUdng i n mdn va dp am cd the lam hdng Idp cich dien; ufng suit cd hpc tai bien ddi theo chu ky cd the g i y lech true De tri hieu suit ciia ddng cd, can thifc hien b i o tri thfch hop Danh muc cac hoat ddng b i o tri phu hpp bao gdm: - Thudng xuyen kiem tra hao mdn d cic d true v i vd ddng CO (de g i i m tdn t h i t ma sit) va kiem tra bui, chat ban d cic dudng thdng gid ciia ddng co (de dam b i o sU t h o i t nhiet) - Kiem tra dieu kien t i i de d i m b i o ddng co khdng bj q u i tai hoac non tai Thay ddi d t i i ddng co dUpfc la d i u hieu ve sii thay ddi cua t i i , c i n tim hieu nguyen nhan ciia thay ddi Bdi tron thich hpp Cic nha sin xuat thudng de xuit cich thifc va thdi diem c i n bdi trdn ddng co Bdi tron khdng chuan se gay nhifng true trie d i neu d tren Bdi trdn q u i mufe can thiet cung se g i y nhufng true trie, vi du nhu dau hoac md dU thCfa d cic d true ciia ddng co se chiy vao ddng co va t h i m vao cich dien, lam hdng hoac g i y nguy co chiy ddng cd - Ojnh ky kiem tra dp ddng true ciia ddng co v i phan duoc truyen ddng lap vdi true ddng co Lech true se nhanh chdng l i m hdng true v i d true, lam hdng ddng cd va phan dan dpng - Chac chin rang day dan va tii dien cd cdng suit va dupc lap dat thich hdp Thudng xuyen kiem tra cac tiep xiic tren ddng co va thiet bi khdi ddng de d i m bao chiing sach v i chit - D i m b i o thdng gid thich hop v i gifl sach dudng l i m m i t de t h o i t nhiet, giam tdn t h i t Tudi thp ciia each 26 Dien & Ddi sdhg dien ddng co cung cd the keo dai: cuf mdi mfle ting 10 C vugt q u i nhiet dp van hanh cho phep cua ddng co, thdi gian tdi ddng cd p h i i q u i n lai g i i m di mdt nfla 2.8 Dieu khien tdc of DCKDB Theo truyen thdng, ddng co mdt chieu dugc sfl dung cd yeu cau ve thay ddi tdc dp NhUng cic han che cua ddng co mdt chieu (di giii thich d phin 2), ddng cd xoay chieu ngiy cang dugc sfl dung nhieu hon cic flng dung ddi hdi thay ddi tdc dp Ci ddng co ddng bd v i DCKDBdeu phu hgp vdi dieu khien thay ddi tdc dp Vi ddng co cam flng l i ddng co khdng ddng bd, thay ddi tan sd cung c i p cd the lam thay ddi tdc dp Cach thflc dieu khien d mdt ddng co cu the phu thudc vao mdt sd yeu td nhfl chi phi dau tU, dp tin ciy t i i va cac yeu cau dieu khien d i e biet khac Dieu ddi hdi phii xem xet chi tiet cic d i e tinh t i i , cic dfl lieu q u i khfl ve dieu khien q u i trinh, cic die diem yeu c i u cua he thdng dieu khien tdc dp, cic chi phi tien dien va chi phf dau tU Cic die tfnh cua t i i (giii thfch p h i n 1) la die biet quan trpng ddi vdi viec quyet djnh cd nen thiic hien dieu khien tdc dp hay khdng Tiem nang tiet kiem dien cao nhat ddi vdi bp dieu khien bien tdc -VSD thudng l i d cic flng dung cd md men thay ddi, vf du nhu bdm li t i m va quat Vdi cac thiet bj nay, cdng suit yeu cau ti le bic ba vdi tdc dp Tii cd md men cd djnh cung phii hgp vdi VSD a Dong co nhieu tdc Cic ddng co cd the dugc quin cho cd the van hanh d hai tdc dp, theo ty le 2:1 Ddng co cung cd the dugc quan vdi hai cudn d i y rieng biet, mdi cudn cho hai tdc dp, tdng cdng la tdc dp Ddng co nhieu tdc dp cd the dugc thiet ke cho cac flng dung c i n md men khdng ddi, md men thay ddi, hoac cdng suit d i u khdng ddi Cic ddng co nhieu tdc dp phil hgp vdi cic flng dung can dieu khien tdc dp gidi han (2 hoac tdc dp cd djnh thay vi thay ddi tdc dp mdt dai lien tuc) Cic ddng co loai khdng kinh te lam vi hieu suit t h i p hon so vdi ddng cd mdt tdc dp b Bo dieu khien tdc vd cap (VSDs) Bd dieu khien tdc dp vd cap (VSDs) cdn gpi la bd bien t i n (inverter) cd k h i n i n g thay ddi tdc dp ddng co Cic thiet bj n i y sin cd d i i tfl vai kW den 750 kW Chiing dflgc thiet ke de dieu khien DCKDBtieu chuan v i cd the de dang lap d i t cho mdt he thdng san cd Bd bien t i n thudng dugc b i n rieng vi ddng cd cd the d i cd san, nhUng cung cd the mua bd bien tan kem vdi ddng co Khi tai thay ddi, bd dieu khien tdc vd c i p hoac ddng co hai tdc dp cd the giam mfle tieu thu ning lugng d cic bdm li t i m va quat xudng 50% hoac hon Mdt bd dieu khien cO b i n bao gdm mdt bd bien tan thiic hien chuyen ddi tan sd tfl 50 Hz sang cic t i n sd v i dien i p thay ddi theo yeu cau t i i Tan sd thay ddi se dieu khien tdc dp cua ddng co tuong flng Hien nay, cd ba kieu bien tan Od la Bien t i n ddng ngudn (CSI), Bien tan dien i p bien thien (Wl), va Bien tan dieu bien dp rdng xung (PWM) TIET KIEM NANG LI/0NG Q c Bd dieu khien mdt chieu (DC) ^ Cdng nghe dieu khien mdt chieu la cdng nghe dieu khien tdc dp dien l i u ddi nhit He thdng dieu khien bao gdm mdt ddng co mdt chieu v i mdt bd dieu khien Odng CO bao gdm cic cudn diy va phan flng Cac cudn c i m can cd kich tfl mdt chieu de ddng co hoat dpng, thfldng la vdi mfle dien i p khdng ddi tfl bd dieu khien Cic ndi mach phan flng dugc thUc hien qua chdi than va bd chuyen mach Tdc dp cua ddng co ty le thuin vdi dien i p cap Bd dieu khien la bd chinh luu kieu cau dieu khien pha vdi cic mach logic de dieu chinh dien i p mdt chieu cip cho phan flng cua ddng co Dieu khien tdc dp thflc hien nhd dieu chinh dien ap phan flng cua ddng co.Thdng thudng, mdt may phit tdc dupc lap kem de d i m bio dieu chinh tdc dp chfnh xic Miy phit tdc cd the lap tren ddng cd de phit cic tfn hieu phin hdi tdi bd dieu khien d Bd dieu khien dong co xoay chieu rdto day quan (DCKDB CO vanh trUort) Ddng co rdto d i y quin sfl dung mdt rdto cau tao die biet de cd the dieu khien tdc dp Rdto ddng co gdm cic cudn diy dugc ning khdi ddng co bang cic vanh trugt tren true ddng CO Cic cudn d i y dugc ndi vdi mach dieu khien, vdi cic bien trd lap ndi tiep vdi cic cudn day Cd the dieu khien md men ddng CO bang cic bien trd Cic ddng co rdto d i y quin phd bien nhat khoing tfl 300 HP (sfle ngfla) trd len Cac giai phap lUa chgn Phan dUa danh sach cic giai phap sfl dung nang lupng hieu q u i nhat ddi vdi ddng cd dien - Duy tri mfle dien i p cung c i p vdi bien dp dao ddng tdi da la 5% so vdi g i i trj danh djnh Hdi thao ve djch vu khach hang va tiet Iciem dien nang H di t h i o "Djch vu khich hang va tiet kiem dien ning cua cic Cdng tyOien lUc Nhit Ban"td chflc tai Ha Ndi tfl - / la mdt nhflng hoat ddng thudng nien theo thda thuin hpp t i c gifla EVN va Trung t i m Thdng tin Oien Iflc Nhit Ban (JEPIC) FV2011JEPIC/eVN Sem omerServKzeandEntrg, S^ a j n " * El«ir.t Cic hpc vien l i 50 cin bd den tfl cic tdng cdng ty dien life, cdng ty dien lUc se cd co hdi nam bat dupe them nhflng thdng tin thiet thUe va hflu fch ve djch vu khich hang va TKD Thdi gian qua, cung vdi viec thifc hien cic - Giim thieu sfl m i t cin bang pha khoing 1% de tranh lam g i i m hieu suit ddng co muc tieu sfl dung ning lugng tiet kiem v i hieu - Duy tri he sd cdng suit cao bang each lap tu bu d vj tri cang gan vdi ddng co cang tdt viec ning cao chit lugng cdng t i c djch vu khich - Chpn cdng suit cua ddng co thich hop de trinh hieu q u i t h i p v i he sd cdng suit kem q u i ndi chung va sfldung dien tiet kiem ndi rieng, hinh dugc EVN die biet quan t i m nhim xiy dUng hinh i n h , quing b i thuong hieu va ning cao uy - D i m b i o mfle tai cua ddng co Idn hon 60% tin hon nfla cua EVN ddi vdi khich hang sfl dung - Ap dung chfnh sich b i o tri thfch hgp cho ddng cd dien Qua dd, tao diing hinh i n h ben vflng - Sfl dung cic bd dieu khien tdc dp (VSD) hoac hai c i p tdc dp cho cic flng dung thich hgp -Thay cic ddng co hdng, q u i t i i hoac non t i i bang cic ddng cd hieu suit cao - Quan lai cic dpng co bj chiy tai cic djch vu ky thuit dim bio Idng khich hang theo phuong chim "Khich hing l i sUtdn tai cua chflng tdi" Thdng qua cudc hdi t h i o niy, nhieu can bd den tfl cic Tdng cdng ty Oien Iflc, Cdng ty Oien lUc cd cd hdi nam bat dugc thdng tin cua cic cdng ty -Tdi flu hoi hieu suit truyen ddng thdng qua b i o tri v i lip d i t dung cich cic true, xich, banh ring, bd truyen dai dien lUc Nhit Bin Trao ddi hpc hdi, kinh nghiem, - Kiem soit nhiet dp mdi trfldng xung quanh de keo d i i tudi thp cich dien v i dp tin ciy cua ddng co, vi du nhfl trinh de ddng co dudi vdi anh ning mat trdi triic tiep, d i t ddng cd d nhflng khu vflc dugc thdng gid tdt v i gifl ddng co d tinh trang sach se - Bdi trdn ddng cOtheo chi djnh cua nha sin xuit va sfldung dau hoac md chat lugng cao de trinh bj nhiem ban hoac nude v i n de lien quan den cdng t i c djch vu khich hang kien thflc vdi cic chuyen gia Nhit Bin ve nhflng v i thifc hien tiet kiem dien Hdi t h i o cung la djp t h i t chit hon nfla sU hieu biet, quan he hop t i c gifla EVN, JEPIC va cic cdng ty dien life Nhit Bin NgocThp Dien & Ddi sdhg 27 ... cau ve thay ddi tdc dp NhUng cic han che cua ddng co mdt chieu (di giii thich d phin 2), ddng cd xoay chieu ngiy cang dugc sfl dung nhieu hon cic flng dung ddi hdi thay ddi tdc dp Ci ddng co ddng... cd the lap tren ddng cd de phit cic tfn hieu phin hdi tdi bd dieu khien d Bd dieu khien dong co xoay chieu rdto day quan (DCKDB CO vanh trUort) Ddng co rdto d i y quin sfl dung mdt rdto cau tao