BAI BAO KHOA HOC
NGHIEN c u t ; CHE DO HUY DONG N G U 6 N THUY DIEN DAI HAN TRONG H? THONG DIfN VlfT NAM
Hoing Cong Tuan'
T6m tat: 7>o«g ca cdu cua he thdng diin Viit Nam, ngudn thiiy diin chiim ty trgng cao. Hdu hit cdc trgm thiry diin vita vi ldn trong hi thong diu cd ho diiu tiet dii hgn. Mdt trong nhung dac diim khai thdc ho chira logi niy Id anh hudng hgu tdc ddng, do do dnh hucmg din hiiu qud Idtai thdc toin hi thSng. Bai bdo trinh bdy ca sd khoa hgc cUng nhu che do huy ddng ngudn thdy dien dii hgn trong thiit ki cung nhu trong vdn hdnh nhdm ndng cao hiiu qud khai thdc nguon thdy diin, tu do gidm chi phi cho hi thdng. Nhiing kit qud thu dugc tu viic dp di^ng tinh todn cho trgm thiry diin My Ly cho thdy hieu qud cda phuangphdp nghiin cicu.
Tir khoa: Thiiy dien; He thong dien; Che dp dai han.
I.BATVANDE
Nhu cSu sii dung nang lupng dien ngay cang doi hdi cao ve so luong va chat lupng. Trong ca cau nguon di?n ciia hd thong difn Vift Nam thi thuy di?n van dang chidm mpt ty trpng cao (gin 40%), tuy nhidn ty trpng nay se co xu huong giam trong tuong lai (du kidn 23,1% nam 2020).
Khi ma nguon nhidn lieu ngay cang can kiet, gia nhien lifu nhSp khau ngay cang tang va kem 6n dinh thi van dd khai thac va sii dung c6 hifu qua nguon thu^ didn cang tro ldn cip thidt.
DSc didm ciia cac tram thiiy dien (TTD) la che dp lam vifc thay doi tiiy thupc vao didu kifn thuy van va kha nSng didu tiet cua hd, do do lam cho chd df lam vifc ciia cac ngudn difn khac trong he thdng ciing thay ddi theo. Hiu nhu cac TTD vita va ldm ciia nude ta ddu cd hd didu tidt dai han. Ddi vdi hd didu tidt dai han cin phai djnh ra chd dp lam vide cd Iai cho toan bd chu ky didu tidt hay chd dp dai han, vi nd cd anh hudng den dd an toan ciing nhu hifu qua kinh td cung cip didn ca nam ciia cac TTD ndi ridng va cua toan bo he thdng didn ndi chung (Nguyen Duy Lieu, 1974).
Tir dd cho thay, viec nghien ciru co so khoa hoc, til do dua ra phuong phap xac dinh chd dp
Klioa Nang iiratig. Truang Dai hoc Thiiy loi.
huy dpng nguon dai h ^ cac TTD khi lam viec trong hf thdng \k rit thidt thyc. Phuong phap nghien ciiu dupe ling dung dl tinh todn cy thd cho TTD My Lj.
2. CO S 6 KHOA HQC VA PHlTONG PHAP XAC e p i H
Doi vdi cdc TTD lam vide trong hf thdng difn (HTD), khi chf dp lam vifc ciia TTD tiiay ddi se anh hudng den che dp lam vifc cda tit ca cac tram phdt difn khdc ttong HTD. Dd khic phuc didu do, phai dinh ra mpt chf dp lam vifc cua TTD cd lpi chung cho todn hf thdng. Ddng thdi ddi vdi cac ttam cd hd dif u tidt dai han, che dp Iam vifc phdi cd lpi cho toan bd chu ky didu tidt. Chd dp cd lpi trudc hdt la chd dp thod man didu kifn an toan cung cip difn cho hf thdng, ddng thdi sir dyng hifu qua va tan dyng tdi da ngudn thiiy nang (Nguyen Duy Lieu, 1996;
Hoang Cdng Tuin, 2005). Tidu chuin chung nhat dd danh gid chd dp cd loi Id tdng chi phi tinh todn cua he thdng la nhd nhit (Cw => min).
Day la tieu chuan cin phdi tinh todn theo khi xdc dinh thdng sd ciia TTD dang thidt kd ciing nhu khi xdc dinh chd dp cua TTD dang van hanh. Tuy nhidn, tuy theo dieu kidn thuy van cu the, CO ciu cua HTD, trang thai can bdng nhidn lieu cung nhu can bang nang lupng chung ma tieu chuin dd dupe thd hidn dudi nhtmg dang khac nhau.
50 KHOA HOC K? THUAT THUY LOI VA MOl TRUdNG • S6 57 (6/2017)
2.1. Che d$ Um vifc dhi h?n cfla TTB trong thiet kl
Tii tiSu chuan chung Cht => min, trong dilu kiSn Ihilt kl chi dd ldm viSc dM han ciia TTB trong nSm nude ki^t thilt kl phSi tihda man tiSu chuin thay thi duge nhieu lihlt cdng suat cua tram nhi?t dien (TND) trong cSn bang cua HTO.
Muc dich cda viec xac djnh chi do Utm vi?c cd lgi la dl tim ra thanh p h ^ cdng suit cdng tac ldn nhit cda TIB (N^^). Dl dat dugc tieu chuan tren TTD phai dam nhan phin phu tai dinh dl tang cdng suat va phai tuan theo su phan phdi phy t^ hgp 1^ trong mua ki?t hay toan nam (Nguyen Duy Lieu, 2003). Phuong phdp phdn phoi hgp i^ la dudng phan chia ph\i tai giua thuy di^n vd nhiSt di^n trong HID phai theo mpt dudng thing nim ngang.Vdi su phdn chia nhu vay thi TTD se thay thi dugc nhilu nhit cdng suit cua TND hay N^f^^^ cd gia tri ldn nhit va edng suat edng tac ldn nhat cua TND (^mLx) c^ S*^ tri nhd nhdt. Nhu vdy xac djnh chi dd lam vi6c cd lgi cua TTD trong ndm nude kiet thiet kl ehinh la tim vj tri thdp nhat cua dudng phan chia phu tdi giOa thuy di|n va nhi?t dien, hay dien ndng (miia ki?t hay ndm) cua thuy di?n la ldn nhat (B9 mdn Thuy di?n, 1974).
D§c diSm ciia HTB nude ta Id ngudn thuy dien chiem ty trpng ldn, chi dd ddng chdy cua cae sdng l^i tucmg dli ddng pha, miia kiet it nude lgi keo dai. Trong khi do nhu cdu dung di?n trong mua ki|t Iai ldn. Do dd trong mua ki^t cdn bdng cdng suat cua he thdng rdt cdng thdng. Trong dieu kien dd neu chi dg ldm vi?c cua cdc TTD eho di?n ndng bdo dam mua kiet ldn nhat la rdt ed lgi vi se thay the dugc nhilu nhdt cdng suat eua nhipt dien. Nhu vdy, trong dieu ki?n thiet ke cdn chpn thdng sd hd chua thiiy dien sao cho dien nang miia kiet cua TTD Id ldn nhdt.
2.2. Che a$ Uan vifc dhi h^n cua TIB trong vkn hanh
Trong dilu kipn v$n hdnh, d l ^ lugng cda r r o thay ddi theo tinh hinh thu^ vdn n&i vl mat an toan thuong ngudi ta chia dilu kipn thuy vdn thdnh: nam nhilu nude, nam nude trung binh, ndm nude kifit thilt ke vd ndm rit kiSt. Bh thda man tiSu chuin chung Cht => min, chi dd ldm viec cua TIB trong mSi ndm dd cd thi thay thd bdng ti€u chuin ddnh gid tucmg duong (Nguyin Duy LiSu, 1996).
2.2.1. Vdi nam thuy van cd lup^g nir&c Idn han lirgng ntr&c c&a nam ki$t thiit ki
Trong giai doan van hdnh cdng suit ldp ddt ciia TTD va TND dd biit. Nhu vay, vdi thiiy dien thi vdn diu tu da biit vd khdng thay dli, chi phi vdn hdnh khdng phu thudc vdo chi dd lam vipe (tien luong, khiu hao...) hodc phu thugc khdng ddng ke (chi phi sua chfl-a thudng xuyen... thay doi it). Vdi nhipt dipn, vdn dau tu cung da biet va khdng thay ddi, chi phi van hdnh hang nam thay ddi chu y6u do chi phi nhien lieu, chi phi nhien lieu nay phu thudc vdo dipn lugng phat ra, cdn ehi phi khdu hao va ehi phi qudn ly van hanh it thay ddi. Vdi nhung ndm nay, lugng nude ldn hem ciia ndm thiet ke nen sS ddm bdo an toan cung cdp dien ma chi phi vdn hanh khdng ddi. Nhung khi thuy dipn dam nhan nhieu phu tai hem thi phan phu tdi nhi|t dien phdi dam nhan gidm, do dd giam chi phi nhien lieu eua nhiet dien.
Tu do ta thay can xdc dinh che dp ldm vipe cua TTD sao cho cd the tan dung ngudn nude va thay the dugc nhieu nhat dipn ndng ciia nhipt dien hay chi phi nhien Heu eiia he thdng (C^') la nhd nhat.
J-1 M
f=i
Trong dd: C^!^j: Chi phi nhien lieu d TND thuj.
- gj: gia nhien lieu TND thuj
(1) (2) - bj,[ : suat tidu hao nhidn lifu cua TND j d thdi doan t.
KHOA HQC KY THUiT THUY tga VA Mdi TRirftNO • S6 57 (6/2017)
-£j,f: difn nang cua TNB thii j 6 thdi do^n t.
- n: tdng s6 TND cd trong HTD - k; tdng so thdi doan tinh todn.
Nfu coi gid nhien lifu a cac TND nhu nhau (cimg sit dyng mpt nguon nhien lifu). Nhu v$y, tit tidu chuin (1) din ddn tidu chuan lupng nhidn lifu tieu hao cua hf thdng la nhd nhdt:
B"' = 'Z^b,,E^.=>mm
(3)Tieu chuin (3) c6 ydu ciu tinh todn philc t?p, vi phdi tmh cho nhi^u bai toan che dO ngin h?n ndn cin cd dudng d ^ tinh tidu hao nhien lifu ciia nhift difn. Ndu gia thidt suit tidu hao nhidn nhidu cua TND la nhu nhau (bj = hs) thi tiJr tidu chuin (3) ta cd thf thay th^ bing tidu chuan difn nang cua nhift difn (ENB) 14 nhd nhit hay difn nang cua thuy difn (ETB) la ldn nhat:
7=1 (=1
(4) TiSu chuin difin nang cua thuy dipn ldn nhdt
(4) se ldm cho bai toan trd ngn don gian hon.
2,2.2. Vdi nam thiiy vSn it ntrdc, it ntrdc han n&m ki§t thiet ke
Vdi nhfing nam rdt kipt nude, TTD khdng the
nude phdt Sen, r\ hipu suit to may, N(t) cdng suit td mdy. Cdc thdng sl ndy deu Id in sd vd Id hdm cua nhilu biln sd khac nhau. Vi vdy, cdn phdi chgn mdt trong nhung biln sd dd ldm thdng sd khdng phu thuge. Dl thugn lgi cho tmh toan ta phat ra cdng suit va dien lugng bdo ddm. Do dd chgn mue nude thugng luu theo thdi doan ldm phdi giam miic du triJ cua he thdng hog.c han
ehi di^n lugng cung cap eho cdc hp diing. TiSu chudn danh gia chi dp ldm viec TTD trong ndm nude rit kipt la chi phi ve nhfing thipt hai do thilu dien gay ra cho nen kinh te qude dan la nhd nhit (Cu, => min). Nhung viec danh gid chinh xdc thiet hai bdng tien Id rdt khd khan, do do vipe danh gia theo tieu ehuan nay la rat phiie tap, khd cho ket qua chinh xac. Nhu vay, trudng hgp he thdng thieu dien thi che dp cd lgi Id che dp dam bao dien lugng thuy dien phat ra la ldn nhat, luc dd tri sd dien lugng thieu trong he thdng se la nhd nhat, nhd dd kha nang cung cap dien an toan se tdt hon. Do dd, ddi vdi nhung ndm nay tieu chuan thay the Id dien lugng ciia thuy dipn la ldn nhat (E-rj, => max)
2.2.3. Mo hinh bai todn
Tir nhiing co sd phan tich tren ta cd md hinh bai toan xac dinh che do dai han trong giai doan van hanh ciia TTD:
Tieu chudn: ETD => max hay ETD ^ f((Zti(t), Q(t), H(t), n, N(t)) -> max
Che do lam viec ciia TTD d tung thdi doan dugc xac dinh qua cac thdng sd: Z,i(t) muc nude
biln sd dpc lap, cac thdng sd cdn lai Id thdng sl phu thudc. Nhu vay ta cd bdi todn nhu sau:
Tim td hgp Zti(t) sao cho hdm myc tieu: ETD (Z,i(t)) => max
Va thda man ede rdng budc:
+)Zti(t)min<Ztl(t)<Z,i(t)™ax
Zti(t)min: muc nude thugng lim nhd nhat, phy thudc muc nude bom, tudi tu chay.
Zii(t)max: muc nude thugng luu ldn nhat, phy thupc muc nude theo yeu cdu phdng IG.
+)Q(t)mm<Q(t)<Q(t)max
Q(t)min: liru lugng phat dien nhd nhit, phy thudc yeu eau lgi dung tdng hgp va cdng suat tdi thieu.
Q(t)max: luu lugng phat dien ldn nhdt, phu thudc kha nang qua nude cua Tuabin
+)N(t)„,in<N(t)<N(t)max
N(t)niin: cdng suat phat dien nhd nhdt, phu thudc yeu cau lgi dung tdng hgp, thiet hi.
N(t)max: cdng suat phat dien ldn nhdt, phu thuoc vao cdng suat kha dung.
Sir tdn tai cua tung rang budc do dilu kipn cy the quyet dinh. Day la dang bai toan quy hoach phi tuyen vdi cac rang buoc dang thuc va bat thugng luu, Q(t) luu lugng phat dien, H(t) cdt dang thuc. Bk giai bai toan nay cin dung phuong
52 KHOA Hpc K? THUAT THOY LQI VA H O I TRlTdNG - S6 57 (6/2017)
phap quy hojch t6i uu de gidi quyet (V.Venikov et al, 1984; Nguyen Doto Phudc va Phan Xuto Mmh, 2000). Hidn nay cd nhieu phuomg phdp di gidi bdi todn trdn (Tsveticov E.V, 1967), moi phuong phdp chi thich hpp vdi m0t dieu kifn c(i thd. Mu6n gidi phdi sii d^ng mdy tinh dien tii cd ciu hinh ldn.
Trong pham vi nghidn cilu ndy, chiing tdi sii dpng cdng cy Standard Solver trong phin mdm Microsoft OfBce Excel d^ giai bdi todn hay md phdng qud ttinh van hdnh cda m$t TTD. Cdng cy ndy cho phep gidi bdi todn quy hoach toi uu dudi dang tuyen tinh va phi tuyen rit tidn lpi.
Viec img dung cdng cu ndy de gidi bai todn ndu ttdn sd gidp gidm duoc khii lupng tinh todn, cho ket qua nhanh va ddng tin cdy.
3. AP DVNG TINH TOAN CHO T r a M * L * 3.1. Gidi thifu chung TTD My L^
Thuy difn My L^ nim d thupng ngudn sdng Cd, xd My Ly va Td Ca, huydn K^ Son, tinh Nghf An. Thiiy difn Mf Ly cd hd didu tidt nam, cdng suit lip mdy Nim = 250 MW, sdn lupng difn binh quan hdng ndm khodng Eo = 914,2 tridu kWh. Du dn Thuy didn My Ly dupe ddnh gid la d\r dn cd quy md tuong ddi ldn, du kidn phat difn Ifn mjng ludi difn qudc gia vao ndm 2020.
3.2. Phuomg phap tinh toan vd kit qua thu du'9'c
3.2.L Trong diiu ki$n thiit ki
Theo Tu van thiet ke, TTD My Ly dupe chpn vdi mirc nude dang binh thudng (MNDBT) Id 330 m, muc nude chet (MNC) Id 310 m, N^ Id 250 MW. D\ra trdn cd sd ly ludn d ttdn ve xdc djnh chf dp ddi h?n cua TTD ttong thidt kf.
Theo dd, ttong giai d o ^ thidt kd cin chpn thdng so hd chiia sao cho difn ndng miia kift Id ldn nhdt, Emk => max. Trong ph^m vi trudng hop dp dyng nay, MNDBT duoc in dinh nhu Tu vin thift ke da chpn va xem xet Iai vifc chpn MNC.
Trudc tien, sir dung phuang phap tinh toan thiiy ndng coi luu lupng phdt difn miia kift khdng ddi (Q = const) dd danh gia mdi tuong quan giira MNC va Emk. Ndm thiiy vdn dupe
chpn tmh toan Id ndm kift thift kd (Pu, = 90%).
Kdt qua tinh toan cho thiy khi MNC cang gidm thi Emk cdng tdng voi xu hudng tifm c|n vdi gid tri cvrc tri. Trong pham vi gidi han MNC dupe xem xet (MNC = 298 m) thi khi MNC cdng gidm flii Erft vln tdng ddng ki. Cd nghia vifc chpn MNC thap hon sd cd lpi hon, sd thay thi dupe nhiiu hon cdng suit lip dat ciia nguin khdc vd do dd s5 gidm chi phi cho hd thing.
Bang I trinh bdy kit qud tinh Emk ddi vdi mdt s6 phuong dn MNC di tif n xem xet ddnh gid.
Bang 1. Ting harp kit qua tfnh E„i, theo cdc phu-ong phap.
MNC 310 (m) 305 (m) 298 (m)
Erfi (10* kWh) theo cdc phuong phdp Q = const
338,51 350,99 364,09
Emk => max 343,74 359,70 379,44
N = const 343,70 359,70 370,30 Tiep theo, nham danh gia diing hon gid tri Emk hay kha ndng thay thi cua TIB, ta six dung cdc phucmg phap tinh todn khac nhau nhu:
Phucmg phdp coi edng suat eae thdng miia kiet khdng ddi (N = const) vd Phuang phdp tinh todn tdi uu vdi biln dieu khiln la mue nude thugng luu tung thang va theo tieu chudn Emk -> max.
Cac rdng bude ve muc nude thugng, ve luu lugng va ve cdng sudt cua tiing thdng ciang dugc xem xet dua vdo trong tinh toan. Cdc phuong phap nay do phai tinh l^p nhieu vd khdi lugng tinh todn ldn nen phdi su dung sy trg giup cua edng cy Standard Solver trong phin mim Microsoft Office Excel. Kit qua tinh todn dugc tdng hgp trong Bdng 1.
Tir bang tdng hgp kit qud eho thiy, viec gidm MNC tu 310 m xudng 305 m vd 298 m mdc du muc dp tdng cd xu hudng giam ddn nhung Emk vln tang mot lugng kha ldn (tang 12,5.10^ kWh va 25,6.10^ kWh dng vdi MNC giam xudng 305 m va 298 m). Tuy nhien, d day mdi tinh den su thay doi cua dien lugng mua kiet ma chua xet den dien lugng ndm. Hon nua,
KHOA HOC Kf THUAT THIJY Lgi VA Mdi TRl/dNG - S 6 57 ( 6 / 2 0 1 7 )
vide sii dyng phuong phap tinh todn khac nhau cho kit qua Emk khdc nhau. Phuong phdp tinh toi tra (Emk => max) cho kit qud 16n hon hdn so vdi phuong phdp thudng dung (Q = const). Diiu ndy cho thiy, dd ddnh gia dung khd ndng thay thi hay khd ndng huy ddng nguin tiiuy difn thi vide chpn phuong phdp tinh todn la quan frpng.
3.2.2. Trong diiu ki$n vin hanh Trong giai doan v|in hdnh cac thdng sd thiet ki dd xdc dinh thi vifc cin ldm Id xdc dinh che dp lam vide trong cd ndm cua I I D sao cho cd Ipi nhit Theo nhu co sd ly luan a tren, thi chi d$
Bdng 2. Ting hpp kit qud
Idm vifc ddi han cd lpi ciia TTD la chi dO cho didn lupng nam ldn nhit, E„ => max. Vdn dvmg md'Iunh todn dd nfu cCmg vdi sii d\mg cong cy Standard Solver di tinh todn cho TTD My L-j.
Cdc ndm thiiy vdn dtlng tfnh todn Id ba ndm thiy van ddc trung, iing vdi cdc tin suit P = 10%, 50% vd 90%. Di ddnh gid ttoh hifu qud ciia phuong phdp dua ra (E„(Zu) => max), vdi kit qud En thu dupe tii phuang phdp nay sd dupe so sdnh vdi En cda phuong phdp Q = const vd En do Tu vin thiit ki tinh. Bdng 2 trinh bay tdng hpp cdc kit qua thu dirpc bdi cdc phuong phdp.
tinh En theo cac phuwng phdp
P(%) 10 50 90 Trung binh
E„(10'kWh) MNC = 310 m
Q = const 1216,55
969,29 604,22 786,76
En=>
max 1235,74
974,14 629,57 946,48
Tuvin tiiiitkd 1222,02
963,60 626,30 937,30
MNC = 305 m Q = const
1229,42 978,96 590,12 932,83
En=>max 1247,40
981,89 615,93 948,41
MNC = Q = const
1242,00 977,80 571,19 930,33
= 298m En => max
1253,63 989,99 606,06 949,89 Tu ket qud d Bang 2 cho thay:
+ Trudng hgp MNC = 310m (nhu Tu vin thiet ke chgn), dien ndng thu dugc cho cac ndm thdy vdn khac nhau tir phuong phap dua ra dlu ldn hem ket qua ciia Tu vin thilt kl tinh va ciia phuong phap Q = const.
+ Dli vdi cdc trudng hgp MNC khae nhau, phuong phap En => max dlu cho kit qud Idn hon phucmg phap Q = const. Tir do cho thdy hipu qud cua phuong phdp dua ra. Ddng thdi, cho phep danh gia dung hem gia tri dien ndng ciia TTD.
+ Xet 3 phucmg an MNC cho thiy, khi MNC giam mac du En ciia ndm kiet thilt kl (Pik = 90%) giam nhung E^k cua ndm nay tang vd En trung binh nhilu ndm cung tang, cho du muc dp tang cd xu hudng giam ddn. Trong trudng hgp nay, viec chon MNC thip (305 m va 298 m) viia co lgi dli vdi chi do dai han ca trong dilu kien thilt kl va van hanh. Dii sao d day chi mdi xem xel ve mat lgi ich nang lugng ma chua xet din phin chi phi khi MNC thay
ddi ciing nhu chua xdt din cdng suit khd dyng ciia cdc thang giao mua. Tuy nhien, khi MNC giam thi mac dii chi phi vao TTD cd tdng nhung lugng tang khdng nhieu. Ddc biet, niu diing tren quan diem cua hp thdng thi vipe giam MNC md cd lgi ddi vdi ehi dp ddi hgn cua TTD se lam cho chi phi chung ciia hp thdng gidm, do dd se cd lgi cho toan hp thing.
4. Ktl LUAN VA KIEN NGHI Bao cao da dua ra phuong phap luan tren ca sd khoa hpc va phuang phdp xac djnh chi dp huy dong ngudn thiiy dipn ddi ban khi cac TTD lam viee trong HTB. Tir kit qua tinh todn cho mot TTD cu the cho thdy hieu qua ciia phucmg phap dua ra. Ddng thdi, qua ket qua cua cac phuong phap tinh todn se giiip danh gia dung hon gid trj nang lugng cua TTD khi tham gia ldm viec trong he thdng, tir dd cho phep chon dugc thdng sd co lgi nhat cho TTD. Viec xac djnh chi dp dai han doi vdi cac TTD trong HTD trong dilu kipn thilt ke cung nhu van hanh phai dung tren quan dilm he thong va d trang thai dgng.
54 KHOA Hpc K? THUAT THUY Lgi VA Mdi TRUdNG - S6 57 (6/2017)
T AI U^V THAM KHAO
BO mdn Thuy dipn, Tnrdng D ^ hpc Thiiy Lgi (1974). Gido trinh Thiry ndng, Nhd xudt bdn Ndng thon, HdNgi.
Hoang Cdng Tuin (2005). Nghiin cthi phuang thuc hity dgng ngudn thuy di$n trong h$ thdng di$n Vi$tNam. mmi
NguySn Duy Lieu (2003). Phu biiu dd h$ thdng di$n Vi$t Nam ndm 2004 vd phdn phdi cdng sudt bdo ddm cdc nhd mdy thuy di$n trong h$ thdng di?n Viet Nam. Hd NOi.
Nguyin Duy LiSu (1996). Nghiin ciru chi dg ldm vi$c hap ly cdc ngudn diin trong h$ thdng di?n
^
giai dogn 1996-1997. Ha Ndi.
Nguyen Duy LiSu (1974). Chidd tdm vi$e ciia trgm thity di$n HdNgi.
Nguyin Doan Phudc, Phan Xudn Minh (2000). Diiu khiin tdi iru vd bin vitng. Ha NOi.
V.Venikov, V.Zhuravlev, T.Filipov (1984). Ontimal Operation of Power Plants and electric systems. Moscow.
Tsvetkov E.V (1967). Calculation of ontimal Hydro plant Discharge on computers. Moscow.
Abstract:
RESEARCHING EXPLOITATION REGIME OF LONG TERM SCHEDULED HYDROPOWER SOURCES IN VIETNAM POWER SYSTEM
In the composition of Vietnam power system, hydropower has a high proportion. Most medium and large hydropower stations in the system have reservoir for long-term scheduling. One of scheduling characteristics of these reservoirs is the impact of the impact which affects the operational eficiency of the whole system. This article presents the scientific basis and regime to exploit the long-term scheduled hydropower sources in design as well as in operation to improve the operational efficiency of hydropower, thereby reducing system costs. The obtained results from application for the My Ly hydropower station show the effectiveness of the methodology.
Keywords: Hydropower; Power System; Long-term scheduling.
BBT nhgn bdi: 04/4/2017 Phdn bi^n xong: 24/5/2017
KHOA HOC K? THUAT THUY UJ\ VA Mdi TRUdNG - S 6 57 ( 6 / 2 0 1 7 )
