Đánh giá mạng cung cấp điện vùng mỏ Quảng Ninh Bằng phương pháp mô hình hoá.pdf

Ll/U QUANG VU Vipn Khoa hpc Cdng nghd Md - TKV / ^ T r o n g qua trinh tien hanh c l / kiem toan nang lifdng tai cac edng ty, xf nghiep cdng nghiep thi viec danh gia hien trang mang cun

In the process for energy audit at industrial companies and

enterprises, the evaluation of the power supply network

with the operating norms has played an important role and

basing on it, solutions for proper energy saving should be

proposed This paper introduces the results from the

evaluation of the power supply network at Quang Ninh

coal mines with modeling method

KS Ll/U QUANG VU

Vipn Khoa hpc Cdng nghd Md - TKV

/ ^ T r o n g qua trinh tien hanh

c l / kiem toan nang lifdng tai

cac edng ty, xf nghiep cdng

nghiep thi viec danh gia hien

trang mang cung ca'p dien vdi

cac ehl tieu dang hoat dpng

cCia nd ddng mpt vai trd quan

trpng, cd the dua ra cae giai

phap tiet kiem nang lUdng phu

hdp Ddi vdi nganh khai thac

md thi edng tac nay cdn quan

trpng hdn do khu vi/e khai

thac thay ddi lien tue, sd li/dng

thiet bj tham gia vao qua trinh

san xua't cung thay ddi theo

Su thay ddi nay lam cae thdng

sd eCia mang khdng nhif

nhOrng thdng sd thiet ke ban

dau Hien ed nhieu each de

thu thap vd XL!f 1^ dOr lieu d

khau nay Tuy nhien, phi/dng

phap SLf dung eac phan mem

van phdng va bang tfnh toan

gap nhieu khd khdn va ma't

nhieu thdi gian khi ed si/ thay

ddi nao dd trong mang Dieu

nay hoan toan ed the thi/c

hien ddn gian khi sCf dung

edng eu md phdng PhUdng

phap nay ed nhOrng uu diem

sau:

- Tiet kiem thdi gian tfnh

toan;

- Cd the cap nhat nhi/ng

thay ddi dii la nhd nha't ciia

mang mdt each nhanh chdng;

- Thay ddi cae thdng sd

eCia mang mdt each de dang

de iL/a chpn difdc cac thdng sd tdi i/u

Trong cac cdng cu de md hinh hda mang ha ap, phan mem Matlab dUde diing phd bien nhat va da difdc lifa chpn

de tien hanh kiem toan cung cap dien cho cac xf nghiep

md

1 Cau tao cua mo hinh mang cung cap dien cho cac thie't bj trong md ham 16:

Matlab ed kha nang mo hinh hda cac thiet bj dien nhU dung ham lenh eiia Matlab, lap trinh bang ngdn ngur C tren Matlab Nhi/ng ea hai phUdng phap tren deu phifc tap va ma't nhieu thdi gian, do vay ngUdi

ta thudng dung Sirpulink va cac tools box ciia nd Trong Simulink thi cac ham toan hpc, eac ham vao ra, ham hien thj dUdc tfch hdp s i n thanh khdi trong thu vien, cac khdi nay gpi la cac block Viec md hinh hda cac thiet bj trong md ham

Id cd hai Idp ddi tUdng can di/dc xay di/ng, do la:

- Ldp cac thiet bj dien sii

dung trong md ham 16;

- Ldp mang cap diing de cung cap dien cho cac phu tai trong mang dien md

Mo hinh cac phan tCf trong mang cung cap dien cCia md

ham Id cung cac block chile

ndng cCia chung difdc the hien tren hinh 1

Trong md hinh nay thi module dau vao stjf dung block c6 chL/a cac ham nhan dCf lieu

de nhan sd lieu tCf cac phan doan trudc va thdng sd eiia chi'nh ban than ddi tifdng de

xijf ly Cac thdng sd 6ugc

module dau vao thu thap la cac gia trj ban dau cap cho

mo hinh toan hoc cOa cac phan tCif Trong mo hinh nay

cae phan til la tap hdp eac

cdng thCrc toan hpc, cac phUdng trinh the hien dac tinh eiia ddi tifdng Sau khi dCr Ijeu di/dc xijf 1^ thi ket qua dUa ra chfnh la phan ijfng ciia ddi tifdng ddi vdi cac tac dpng dau vao DCir lieu sau khi di/dc xi^r ly

se di/dc module dau ra gOi tdi cac phan doan tiep theo de XIJT

ly tiep hoac hien thj theo y mudn cCia ngi/di sdf dung

2 Xay dung mo hinh cac thiet bj:

- IVIay bien ap md: May bien ap la cac thiet bj bien ddi dien ap de cap dien cho cac cac thiet bj Trong cac md ham

16, bien ap dat d dau cac tuyen cung cap dien cho cac phdn xudng de bien ddi dien 6kV thanh cac cap dien ap 660V, 380V clip dien cho'cac thiet bj

KHCNM S 6 1+2/2010* CO D I £ N - T I T D O N G HOA MO

a) - Ddi tugng thiet bj cdng tac b)- Ddi tugng cap truyen tai dien

Hinh 1 Md hinh cdc phdn td trong mang dien md

Ngoai ra eon cd cac bien ^iia may bien ap, kVA; A Q O = ''°"9 "Qhiep cd the thifa nhan

ap chieu sang, bien ap di theo

cac may khoan dien, nhi/ng

Chung thudng c6 cdng suat

nhd (<5kVA)

Khi may bien ap lam viec,

trong may bien ap se xuat

hien cac loai tdn that nhu tdn

that cdng sudt, tdn tha't ndng

lupng, tdn that dien ap, Do

dd, viec tfnh toan ve dien cho

may bien ap ddng vai trd quan

trpng trong viec thiet ke va

van hanh he thdng cung cap

dien, danh gia cac chi tieu ky

thuat nham nang cao chat

lupng cung cap dien Viec xac

djnh tdn tha't dien ndng trong

may bien dp dUdc tien hanh

dUa tren cac thdng sd ky

thudt, mifc dp mang tai va sd

gid van hanh

* Tdn tha't cdng sua't trong

may bien dp dUdc tfnh theo

cdng thife:

/ „ V

(1)

APr=APo+AP„x

^dmj

Trong dd: APo'= APo+ K\

xAQo; AP„'= APn+kk,xAQn;

APO - Tdn that cdng sudt tac

dung khdng tai, kW; AP„ - Tdn

that cdng sudt khi ngat mach,

kW; Sa - Cdng suat djnh mifc

Sdm-(io%/100) - Cdng suat phan khang khdng tai de tCf hda MBA, kVAr; i% - Ddng dien khdng tai ciia may bien

ap, tfnh bang %; AQn = S<i„,.(Un%/100) - Tdn that cdng sua't phan khang khi ngan mach, kVAr; Un % - Dien

ap ngan mach eiia may bien

dp, tfnh bang %; k^ - suat tdn that cdng suat tac dung ddi vdi

1 ddn vi tdn that cdng suat phan khdng, kW/kVAr, (k,,, = 0,05-^0,15; vdi xf nghiep cdng nghiep cd the lay kkt = 0,07)

* Tdn hao ndng lUdng cCia may bien dp la:

(s Y

A^=A/^x/+A/^x -^ xr(2)

Trong dd: t - Thdi gian van hanh may bien dp; T - Thdi gian chju tdn tha't edng suat Idn nhat,

Trj sd T cd the xac 6\uh theo 66 thj quan he T = f(Tn,ax,

coscp) hodc cd the xac djnh theo cdng thure kinh nghiem cCia Hezevits: x = (0,124 + T„,axx 10-^)2 X 8760;

Thdi gian sCf dung cdng suat Idn nhat T^ax ddi vdi ludi dien cung cap cho xi nghiep

cac gia tri sau:

Khi lam viec mdt ea: T^„ =

1500-2000h;"

Khi lam viec hai ea: T^a, = 2500-3500h;'

Khi lam viec ba ca: T^ax = 4000-5000h;'

Spt, Sdm - Phu tai va dung lupng djnh miife ciia may bien

dp

- Cdc dong cd dien: Hau

het eac thiet bj sCf dung trong

md ham Id deu ed phan dan ddng la cac ddng cd nhif: bang tai, mdng cdo, mdy khoan, bdm nude, quat vi vay tdn hao do cac thiet bj nay sinh ra chfnh la cac tdn that do ddng ed bao gdm:

- Tdn that trong ban than ddng ed;

- Ton that do ddng cd khdi ddng;

- Tdn that tren doan cap mem cap cho ddng cd;

Ton that trong ban than ddng ed da dupe tfnh toan va the hien tren eac thdng sd

hieu suat rj va he sd edng suat djnh m(lcCos<pj„, ciia

ddng ed Hien nay cae md da sCf dung cac bd "khdi ddng mem" nen tdn hao trong qud

KHCNM S 6 1+2/2010- CO DI$N - T^TDONG HOA MO

ngudn cho đng cd hofit đng

trong qud trinh Idu đị

Tdn hao di^n dp trdn cdp

mdm dU9c xdc djnh:

(V) (3)

Trong đ: P*, - Cdng suS't

djnh m(]te eCia d^ng cd, kW; I

-Chilu đi dofin cap nhdnh, m;

S^ - Ti^t di#n dofn cdp

nh^nh mm*: tide - Hifu sul't

djnh mCte eOa đng co;

T ^ hto e6ng suitt trdn cip

mim cdp cho thi^t bj:

A/'»3J*,lR.10M4)

> Clic dôn cdp di^n

chinh: U cac doftn clip d u ^

sCr dyng đ cung cKp cho die

nh6m f^y t i i trong m?ing, T ^

hao ndng lutpng trdn d u ^ ^

cNnh ^ do n h ^ l « J ^ sinh rsi

khi c6 d6ng di|n cOa die nhdm

phy ^ i ehiy trdn n6^ T ^ hao

edng suKt trin d u ^ clp chH^

taang h ^ trdn m^ tuy^ d p

e6 nWiu phy tii di*?e m\ the©

A/»=3.l»*.R.10^Kyo (5)

Trong do: I

-tinh todin cOai nhdm phy tai; R

- ©i#n trd trdn dtôn dip;

R^XoL (L 14 ehilu d^i cOa

tuyih cap);

^ Xly dvmg nA hinh md

ph^ng mf ng cung dip di|n:

Sau i^hi CO d u ^ md hinh

cac phin tOr, co t h i tidn h^nh

xdy dyng nid hinh m^ng cung

cdp dt#n dvte tren cac phin tCt

xdy dyng ^ trộ Dudi đy Id

md hinh danh gid m?ing cdp

PwameiMt

-Ciku dai oao cHrli (Loe)

|380 T«ldi»nc«pdhinh (Sccj

n

flK I &ine»l I Help ( Aryt,> 1

Hinh 4, Ctia sdnh4p dCtlidu ciia mdt dôn cdp chinh

Lll"'»'^•^^*•^"'"'>«^'t•'s; Uoiii I h u y luc UHV/JOi) \Jbk\'^ So 1 r ? | | X | |

r S u b ^ t 9 M ( r a 4 ^ " - - -

• • P a w M i w * " • " •

-ConautM

& « n 4 f i d h h n u c

Ctmi<iaic4pirih«)h

IS

TM tien c<ip nhanh

|()IE6 Ht«aC^ph) jCtB

m } s^^ \ â \ ^ \

Hinh $ Qd» tdTufilp dSttt^v eik m^ ^ tnwi thm 1^

di#n cho C6ng t r t i ^ Khai th4c 7 cik Ceng ty than M6ng

DOdng (hinh 2)

^ c6 thi tlf\h t d n tSf^ hao cho m^ dôn dip ehlnh thi sd ii#u phii nh|p bao g ^ chilu đi dôn c ^ vii t i ^ d i ^ dip,

e i y Id nhOhg theng sd n^ t^i eOa eJp, d e thdng s^ d n tinh

se dudc mdiy tW\ xi> I;? (hinh 4),

©di tả«ng id thidt hj thi

t h ^ g sd nhip hao gdm chilu đi vd tidt d i ^ dôn d p

mIm d c tham «d d|nh mOo cOa d ^ g cd s i dvi^ tinh t d n vdi tmyln di trin tolin b^ mfng (hinh S),

Trin sd d6 m i phdng c i c4c khd'i hiln thi e4c thing

s i do d u ^ , Cie I^hi1 nliy s i hiln thj thing s d t f I b l U d v l tr( n^o trin mfing bIng dich l^lt n i l khdi n4y vdi dilm

d n do (hinh 6),

KHCNM S6 1+2/2010* CO DI£N -TUDONG HOA M 6

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KHCNM S 6 1+2/2010* CO DifiN - TITDONG HOA MO

KHCNM SO 1+2/2010* CO DifiN - T U D O N G HOA MO

Cong sudt tdn hao tren doan cap

Phan trdm tdn hiao cong suat

^mgfsff

'ong dien tdng tren doan cap chfnh Tdn hao cong sudt tren doan cap

le sd cos(p trung binh Tong cong suat djnh mure ong suat ciia phu tai Idn nhat Tdn hao cong suat tren doan cap mem

He sd yeu cau K^, ciia nhom thie't bj

Ton hao cong suat trong bien ap

He sd mang tai a cOa may bien ap

He sd yeu cau ky<.cCia nhdm thiet bj dau vao may bien ap

^ Hinh 6

a Ket qua cac thdng sd

tinh toan tdn hao mdt doan

cap chinh

b Ket qua cac thdng sd

tinh toan cda nhdm phu tai

c Ket qua cac thdng sd

tinh toan trong may bien ap

DUa theo sd 66 cung ca'p

dien cd the xay dung difdc sd

dd md phdng nhu tren hinh 3

Sau khi lap xong sd 66 md

phdng, tien hanh nhap cdc

thdng sd cho cdc ddi tUdng

Sau khi cho chay md hinh

chiing ta thu 6ugc nhung

thdng sd cd ban eiia mang

dien trong qud trinh van hdnh

(bang 1 vd bang 2)

4 IMot so nhan xet:

Sd 66 md phdng sCir dung

cac thdng sd san cd trong cac

tdi lieu ky thuat vd cd trong

catalog ciia cdc thiet bj hodc

la nhOfng thdng sd cd ban

trong cdc sd 66 cung cd'p

dien Do vay, viec thu thap vd

xit 1^ sd lieu se dd ddng vd

hau nhu khdng gdp khd khan

gi Ket qua md phdng dUdc

hien thj tren cdc Display da

Cae khdi hien thj thdng sdddi tuong md phdng

djnh danh gan vdi moi dd'i ed phan hao phf ndng lupng ti/dng Ket qua sau md phdng

the hien 6ugc nhumg thdng sd

can quan tam ve sU van hanh eiia thiet bj, the hien dUde tinh

rat Idn xay ra do qua trinh hoat khdng mang tai, mang tai tha'p, mang tai khdng deu thi viec xac dinh eac

Bang 1 DOrlipu thu dupc cua mdy bidn dp sau md phdng

Mdy bidn dp TBHDP 400kVA

6/0,69 Sdm

(kVA)

400

HSMT (P)

0,52

AP (kW) 2,7

Kyc 0,5

Mdy bien dp TBHDP 320kVA

6/0,69 Sdm

(kVA)

320

HSMT (P)

0,43

AP

(kW) 2,2

Kyc

0,55 Bang 2 Durlidu thu dupc khi md phdng mang cung cap dien Cdng trudng Khai thdc 7

Phy tai

CTKT7 lay ngudn tCfMBA400kVA CTKT7 lay nguSn tUMBA 320kVA

IPdm

(kW)

344 261,5

mt (A)

419

318

Cos^

0,84 0,84

Kyc

0,5 0,5

S/^cc (kW) 15,6

14

2iiPcm (kW) 1,688 1,08

trang cac thiet bj trong mang cung ca'p dien khi hoat ddng

Qua trinh md phdng cho biet cdc thdng sd cd ban qua trinh van hanh ciia thiet

bj Tuy nhien, ddi vdi mpt sd chCing loai thiet bj nhi/ thiet

bj van tai trong md (bdng tai, mdng cdo, tdi van tai)

he sd mang tai phuc vu cho tfnh toan can ed thdi gian theo ddi mdi danh gia dupe mifc hao phf ndng lUpng ke tren Trong tUdng lai, quy trinh md phdng se dan dupe hoan thien de ed the ddnh

gia 6ugc cdc mifc dp hao phf ndng lupng 66.1

KHCNM S6 1+2/2010* CO DifiN - TITDONG H 6 A M 6