Dao Duy Ygn Tap chi KHOA HQC & CONG NGHE
i T N G D V N G P H A N M E M A N S Y S X A Y D U M O M O H I N H M A Y B I E N A P B A P H A V A P H A N T I C H C H E D O L A M V I E C C U A M A Y BIIEN A P T R O N G D I E U K I E N L A M V l E C B I N H T H U O T M G V A S U C O
Dao Duy Y€n' Trirdng Dgi hoc Ky thugt Cong nghiep — DH Thai Nguyen TOM T A T
Hf thong dien la mot he thflng phuc tap trong ca ciu trtic va vgn hanh, khi xay ra sy co bat ky mot phan tii nao trong he thong deu anh hudng den dp tin cay cung cap dien, chat lugng dien va gay thiet hgi Idn ve kinh te. Vi vay, viec chuan doan dang su co trong MBA 3 pha la mpt bai toan rat cap thiet de phat hien va khic phuc su cd ciia mft tliilt bi rat quan trpng trong he thong dien qua do giam bdt nhttng thiet hgi ve kinh te va nang cao dp tin cay, chat lugng dien cung cap cho cac hp tigu thu la hit siic can thiet.
Bai bao tap trung vao tim hieu cac anh hudng ciia dong dien, dien ap cua MBA phan phoi 22/0.4 kV dl tinh t o ^ mo phong lyc tir tac dung len cac cupn day MBA trong che do lam viec binh thudng va su co chap hai vong day.
Tir khoa: Phdt hien su co, mo hinh Mdy biin dp, phdn mem ANSYS, Phirong phdp cdc phdn tu hihi hgn, cuon ddy
GIOI THIEU
Sy tien bg ciia khoa hgc, ky thuat doi hfli ngudi ky su thyc hien nhQ'ng de an ngay cang phiic tap, dat tien va doi hdi do chinh xac, an toan cao.
Phuang phap cac phan t u hii'u hgn {Finite Elements Methods - FEM) la mgt p h u a n g phap rat tflng quat va hiru hieu cho cac bai toan ky thuat khac nhau. Tir vifc phan tich trgng thai irng suat, bien dgng trong cac ket cau CO khi, cac chi tiet trong 6 td, may bay, tau thuy, khung nha cao tang, dam cau,... den nhiing bai toan ctia ly thuyet trudng nhu: ly thuyft truyfn nhiet, c o hgc chat Idng, dlen-tir trudng... Phan mfm A N S Y S giiip ta thift ke dugc mo hinh M B A 3 pha va mfl phdng lay dugc cac sfl lieu ciia M B A Iam viec trong chf dg binh thudng va su efl.
Gidl THIEU CHUNG VE PHAN MEM ANSYS Hifn cd nhifu phan mem FEM noi tieng nhu:
ANSYS, A B A Q A U S , SAP,... A N S Y S la phan mem phd bien hien nay, dugc sur dung nhiiu trong hgc tap va nghien cuu. FEM la mgt p h i n m i m phan tich phan t u hCru han hoan chinh diing de m o phdng, ti'nh toan thiet kf cflng nghiep.
Phin m f m A N S Y S d u g c tfl chuc dudi dang khoi d l de dang hon khi lya chpn cau hinh
viia phai theo nhu can. Trong so cac khfli chuc nang chinh cd the ke tdi 5 khdi la A N S Y S Maxwell, ANSYS Structure, A N S Y S Design Modeler va ANSYS Meshing, A N S Y S Mechanical Workbench, ANSYS Mechanical.
M O PHONG M B A PHAN PHOI BA PHA 400kVA 22-0.4kV Y-Yo. SLT DUNG PHAN MEM A N S Y S [1], [2]
Thdng sfl CO ban
Tel: 0983214112, Email daoduyyen88@gmailcom
Cong suat dinh miic To dau Difn ap so cap Dien ip thir cdp Chieu cao ciia so Chifu rong cua so Chilu r6ng chan idp 1 Chilu rong chan ldp 2 Chilu day Idp 1 Chilu diy ldp 2 Chilu rong gong Idp 1 Chilu rong gong Idp 2 Dudng kinh trong cuon HA Duong kinh ngoai cuon HA Chieu cac cuon HA So vong cuon HA Duong kinh mjng cuon CA Ducnig kinh ngoai cuon CA Chigu cao cuon CA So vong cuon CA
400 Y-yo-i2
22 0,4 530 302 140 120 200 40 140 120 150/250 189/289 450
22 209/309 282/382 430 2098
kVA kV kV mm mm mm mm mm mm mm mm mm mm mm mm mm mm
Dao Duy Ygn Tap chi KHOA HQC & CONG NGHE 176(16): 185-18!
Hmh I. Mo hinh MBA 3 pha C^c t h i i t l a p Cff b a n t r e n p h a n m e m Thift lap cac thong sd cho loi M B A Trong thiet k l nay ta sir dung thep ky thuat d i e n c d ma JGHIOO
Hinh 2. Mo hinh loi MBA Thiet lgp cac thdng sfl cho cac cuon day M B A
Hinh 3. Mo hinh cuQn ddy MBA T h i e t lap dieu k i l n bien:
Mfl hlnh dugc thiet lap kieu dieu kien bifn doi xiing de tiet kifm thdi gian giai cQng nhu kha nang ciia may tinh [3].
Difu kien bien gidi han khong gian ti'nh toan dugc thiet lap vdi bifn gidi xa v o c y c cd kich thudc gap 1.5 lan kich thudc may bien ap
Hinh 4. Mo hinh cugn ddy MBA T h i e t l a p kich thich
Mfl hinh cac cupn day duoc kich thich bdi mpt mach dien ben ngoai. Mdi cupn day dugc dinh nghTa thflng qua phin tir "Winding" [4], [5].
M o h i n h m a c h M B A
Hinh S. Mo hinh mgch MBA Trong mfl hinh nay cac cupn day va tai dupe thiit lap theo td d i u Y - Y Q . Vdi tai d phia hg ap (Low Voltage ~ LV) dugc thiit lap tuong duong vol trgng thai lam viec 5 0 % tai day la trgng thai lam viec dai hgn phd bien cua cac may bifn ap phan phoi [6],
Thiet lap cac t h a m so cho thuat toan giai mach Ket qua m o phdng sf phan tich 0.2s ke tir thdi diem ddng may t u a n g ducmg vdi 10 chu ky.
B u d c thdi gian d u g c chia 0.001s t u a n g duong 1/20 chu ky phan lich
K E T Q U A M O P H O N G
Sau khi mo phong bang phan mem ANSYS cho M B A 4 0 0 k V A 22-0,4kV Y-YO lam vifc trong che do binh t h u d n g va che dp sy co ta se lay d u g c cac ket qua sau :
Ddng ap dau ra khi M B A lam vifc binh thudng va sy cd;
186
D^o Duy Yen Tgp chl KHOA HQC & CONG NGHf 176(16): 185-18' Lyc dien tii hudng true va hudng kinh tac
dung len ldi khi MBA Iam viec binh thudng va su c6.
KET QUA PHAN TICH KHI MBA LAM VIEC BINH TEJU'dNG
Lirdi chia mo hinh
Mo hinh dugc chia thanh ludi cac phan tii tu giac vdi tdng so phan tir la 197449
Hlnh 6. Mo hinh chia lu&i vd so phdn lu luoi MBA Ket qua ddng, ap phia ha ap
Dien Ap Pha Ha Ap
Hinh 7. Do thi diin dp cdc pha hg dp Gia tri dien ap hg ap pha 230V cd dang ddng sin
Hinh 8. Do thi dong dien cdc pha hg dp Cudng dg ddng dien trfn pha tren cudn hg ap
Ket qua dong phia cao ap
1 ii"""i^'^J /^'"-
Som- ..=0-
XYPkiia
Hinh 9. DQ thi ddng dien cdc pha cao dp Gia tri dong difn hifu dung 3A phan bo deu tren cac pha
Ket qua lire dien tir hirdng true va hirdng kinh tac dung len cuon day
XYPIoUi
Hinh 10. Dd th; lifc dien tu hu&ng true tdc d\tng
lin cdc cugn ddy pha CLyc dien til' hudng true tren cugn day cao ap va ha ap pha C, gia trj Idn nhit cua luc dat 4,93 N tren cugn cao ap va 4,20 N tren cudn ha a
Hinh U. Do thi life diin lit hu&ng kinh tdc dung
lin cdc cupn ddy pha CLuc hudng kinh trfn cupn day cao ap pha C, gia tri Idn nhit trfn cupn cao ap dat 907,11 N.
MO PHONG MBA KHI CO SU CO CHAP HAI
VONG DAY CUA CUQN CAO AP PHA B
Dao Duy Yen Tap chl KHOA HQC & CONG NGHE 176(16): 185-18!
Hinh 12. Mo hinh MBA sg cd chdp hai vong ddy cupn cao dp pha B T h i e t l a p m a c h dien cho M B A Trong md hinh mgch hai vong day d u g c noi t i t vdi nhau thflng qua mpt difn trd cd do Idn b i n g do Idn dien trd thuSn cua hai vong day
[7], [8].'
Hinh 13. So do mach diin cho MBA Ket q u a d a c ti'nh dien a p cac p h a phia ha ^ p
/ / A A
\.-'' y
Hinh 14. Do tht dgc tinh diin dp cdc pha ha dp Dien ap dau ra khflng cd bat cir mgt sy thay ddi nao so vdi trudng hgp khflng su cd, gia trj difn ap hieu dung van d 230 V.
K e t q u a d a c t i n h d o n g cac p h a p h i a h a a p
A X / X \ A
Hinh 15. Do thi dgc tinh dong cdc pha ha dp
Dong difn phia H A khong cd mdt su thay dfli nao so vdi trudng hgp khflng cd sy cd kf ck ve bien dfl va goc pha
KSt q u a d a c t i n h d d n g cac p b a p h i a cao ap
zr-
Hinh 16, Dd thi ddc tinh ddng cdc pha cao dp Ddng difn cue dai pha A va pha C tang 9% (tir 4,3 A Ifn 4,7 A) dong dien pha B tang 2,16 lin.
Tinh doi x d n g v l ddng giQa 3 pha hoan toan bj pha v d khi ddng difn pha B (pha su efl) Idn hon 1,98 lan so vdi hai pha con lgi K f t q u a lure dien tu- tac d u n g len cupn day p h i a cao a p v a h a a p
3 n
f^i Mh
•>%lo Woe
H i n h 1 7 . Dd thi luc diin lir tdc d\ing lin pha C theo phuang hu&ng tri^c Gia tri luc h u d n g true tren cugn day eao ap pha C 43,04 N Idn hon 8,6 lin so vdi trgng thai 5 0 % tai. L y c hudng true trfn cugn ha ap pha C 34,75 N Ion hon 8 l i n so vdi trgng thai 5 0 % tai.
ii™
Hinh 18. Do thi luc dien lu tdc dung lin pha C theo phuang hu&ng kinh Gia tri Iyc hudng kinh c u e dai tren cupn cao ap pha C 1032,30 N Idn b a n 1.13 lin trudng hgp 5 0 % tai.
Dao Duy Ygn Tap chi KHOA HQC & CONG NGHE 176(16): 185- M O T S O K E T LUAN v A HUCJNG PHAT TRIEN
Bai bao da xay d u n g d u g c mfl hlnh M B A 400 kVA 22-0,4 kV Y - Y Q trong phan A N S Y S va mo phdng lay cac ket qua dac tinh ddng, ap cua cac pha, luc difn tir tac dung len cac cupn day klii M B A lam viec binh thucmg va su efl chgp hai v d n g day. H u d n g phat triln cua bai bao se tifp tuc nghien ciiu vf vifc dap ling tan so rung tren vd M B A trong c h l dp lam viec binh t h u d n g va s y c6 [9], [ID].
TAI LIEU T H A M K H A O I. Phan Tii Thu (2005), Thiit ki Mdy biin dp dien luc. Nha xuat ban khoa hpc va kp thuat 2 Thift kg May biin ap (1967), Bo mon May di^n-Khi cu dign. NXB DHBK HN.
1. S, Brahma (2005), Fauh location scheme for a multi-terminal transmission line using synchronized voltage measurements, IEEE Trans.
Power Delivery, 20(2), 1325-1331.
2. Brahma S, Girgis A, (2004), Fault Location on a Transmission Line Using Synchronized Voltage Measurements, IEEE Trans. Power Delivery, 19(4), 1619-1622.
3. P.K. Dash, B.K. Panigrahi, G. Panda, (2003), Power quality analysis using S-lransform, IEEE Power Delivery, vol. 18, pp. 406- 411, 4. Djuric M, Radojevic Z, Terzija V, (1998), Distance protection and fault location utilizing only phase current phasors, IEEE Trans. Power Delivery, 13(4), 1020-1026.
5. Jiang Joe-Air, Yang Jun-Zhe, Lin Ying-Hong, Liu Chih-Wen, Ma Jih-Chen, (2000), An adaptive PMU based fault detection/location technique for transmission lines Part 1: Theory and algorithms, IEEE Trans. Power Delivery, 15(2), 486-493.
6. Girgis A, Hart D, Peterson W, (1992), A new fauh location technique for two- and three-
terminal lines, IEEE Trans. Power Delivery, 7(1), 98-107.
7. Gopalakrishnan A, Hamai D, Kezunovic M, McKenna S, (2000), FauU location using the distributed parameter transmission line model, lEEETrans. Power Delivery, 15(4), 1169-1174.
8. Y. Lin, C. Liu, C. Chen, (2001), A new PMU- based fault detection/location technique for transmission lines with consideration of arcing fault discrimination-part I: theory and algorithms, lEEETrans, Power Delivery, (4), 1587-1593.
S U M M A R Y
A N S Y S S O F T W A R E A P P L I C A T I O N M O D E L C O N S T R U C T I O N P H A S E T H R E E T R A N S F O R M E R S A N D A N A L Y S I S O F W O R K I N G R E G I M E IN T R A N S F O R M E R S N O R M A L W O R K I N G C O N D I T I O N S AND F A U L T
Dao Duy Yen Uninversity ofTechnology - TNU The electrical system is a complex system in both structure and operation, when an incident occurs, any element in the system affects the reliability ofthe power supply, the quality ofthe electricity, and the great damage. Therefore, the diagnosis ofthe type of incident in the three-phase MBA is a very urgent problem to detect and troubleshoot a very important device in the electrical system thereby reducing the economic losses and Improving the reliability and quality of electricity supplied to consumers is essential.
The paper will focus on understanding the effects ofthe electric current, the voltage ofthe 22 / 0,4 kV distributed MBA to calculate the magnetic force simulator effect on the MBA windings in normal working mode and shorting faults.
Keyword: fault detection, transformer model, ANSYS software. Finite Elements Methods, Winding
Ngdy nliQn bai: 01/11/2017; Ngdy phdn biin: 27/11/2017; Ngdy duyit ddng: 05/01/2018 Tel: 0983 214112: Email [email protected],
