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ISSN: 2354-0575 ^^—-^^ (•^ •• ^ '°-""' DE XUAT P H U O N G P H A P DIEU K H I E N MOf PI BAM DIEM C N G S U A T C ^ C DAI DAN PIN DIEN MAT TRCH Le Thi Minh Tam', Nguyin Viet Ngir', Nguyen Van DirongS Nguyen T h a n h Tien^ I Trudng Dgi hgc Su pham ky thugt Hung Yen Bp Gido due vd Dao tgo Hgc vien Ky thugt Quan su Tom t i t : Bdi bdo ndy de xuat mgt phuang phdp thiet ki bp diiu khiin bdm diem cong sudt cifc dgi (MPPT) cho he thdng Pin dien mat trai (PV) sir dung phuong phdp dieu khiin mo PI vai su thich img cda cdc nhan to eho cdc tin hieu ddu vdo Phuong phdp dieu khien md PI dugc dua tren mgt kien trite hi thong diiu khien hai cap, kit hap cdc uu diem cua logic md vd dieu khien PI thdng thuang Qud trinh Idm viee on dinh, ede h0 sd cua PI duac diiu chinh bdi lugt md di gidm thdi gian xu ly vd dam bdo su on dinh, chinh xdc cua hi thong Ngodi ra, cdc tin hiiu dua vdo bd dieu khiin md PI dugc dieu chinh tu ddng ede he sd dua trin he thdng logic md (FLS) Cdc FLS dugc dgc trung bai mpt quy tdc tap md dd la cdu diiu kien ma the hien mdi quan he giua cdc yeu to ddu vdo (sai lich vd vi phan cda sai lech) vai ddu Cach tiip can ndy tgo rampt bp diiu khien MPPT thich ungvd tdng dugc hieu sudt eua hi thdng Cdc kit qud md phdng cho thdy hi^u qud ciia phucmg phdp de xudt cd the dgt dugc diim cdng sudt cifc dgi bat ky diiu kien ciing nhu cdc cdp khdc cua hire xa mat trai vd nhiet dp tren Pin diin mdt trdi (PV) Tie khoa: Pin diin mat trdi (PV), Bdm diem cong sudt cue dgi (MPPT), Diiu khiin ma PI (FLS - PI) D^t vin di Thuat toan MPPT duoc coi la mgt phin khdng the thieu he thong Pin PV, dugc ap dyng vdi mong muon nang cao hieu qua sir dung ciia dan Pin mat trdi No dugc dat bp dieu khiin bg biin d i i DC/DC Cac thuat toan MPPT digu khign ciia bp bign ddi DC/DC sir dyng nhieu tham so, thuong la cac tham so nhu dong Pin PV, dien ap Pin PV, ddng ra, dien ap eua bo DC/DC Cac thuat toan dtiac so sanh dtza theo cac tieu chi nhtl hi«u qua dinh diSm lam viec CO cong suit Idn nhat, so lugng cam bien sir dung, dp phiic tap eua hp thong, tdc dp bien doi Mgt bat Igi Idn ciia cae he thdng Pm PV la ddi hdi chi phi tuong doi cao hon miic cin thiet cho he nang lugng so vdi cac nguin nang lupng tai tao khac nhu nang lugng gio Vi vay toi da hda hieu qua cita cong suat dau bing each bam sat digm cong suat eye dai la rat quan trpng cho hoat dgng toi uu cua he thong Pin PV He thing Pin PV dugc ndi vdi ludi dien thong qua bp chuyin dii DC-DC Dd dat dugc MPPT he thing Pin PV thi gia tn dien ap (hoae ddng) cd t h i dugc quy dinh bing each ap dung mgt tin hieu diiu khien eho bg chuyen d6i[l-2] Dg dat duoc MPPT, thuat toan diiu khiin md PI da dugc d i xuat va thyc hien ddi vdi Pin PV Mono-cell hang Bosch (Diic) san xuit eo nhiing thong so ca ban d diiu kien tieu chuin (lOOOW/m^ d 25''C): p _ 50 w, Vj,,pp= 18 V, I„pp = , 7 A , y ^ = 22,12 y"Y =3,04 A C i c yeu to anh hirong den hieu suat Pin PV Tir so d i tuong duong cua Pin PV Hinh Khoa hpc & Cong nghe - So 4/2014 Hinh Mgch diin tuang duang Pin P V ^^^ ' ' ' " S dncfc cac moi quan he dong dien, * ? " ^P ™ ™"8 ""^^^ ^^f" P ' " p y ( ^ - ^ ^ ^ I n -7^+ ' " ' 1=1 { ^ \ \ r (T— T \ '''' •^'^UOOO/ ^^ "^' r aV \ P= f7— VI^,^- ^^n^''^'P\i^)~ (1.1) (\ ')\ ' ^^-^^ Trong do: I : ddng dien quang (A); I^; dong dien chay qua DIODE (A); 1^^,: ddng dien chay qua ngi tro song song \^ (A); I: ddng dien chay qua tai va npi trd noi tiep R3 (A); I^; dong dien bao hda cua diode D (thuong liy 15=8.10-^) (A); I^idong dien bao hda dan Pin PV (A), R^,^, R^: la npi trd song song va ngi trd ndi tiip ciia dan Pin PV(£1); V: dien ap tren tai (V); V^: la dien ap ngin mach (V); q dien tich (C); Journal of Science and Technology 73 ISSN: 2354-0575 n he sd mat ghep p-n dan Pin P V Gin diing cd the liy n = 1, ^ I ' nhiet dp tuyet d i i cua b i mat dan Pin PV gia tri eiia T = 300k; k' he s i Boltzman(J/K) Tir dd md phong va nhan dugc cac dac tinh V-A, dac tinh cong suit cua dan Pin PV nhu Hinh Hinh S=1000W/ttf - ' ' ' * ' — - T=40-C - s=aoow/nv' " " " ^ S=600W/in= -"-''^ S=400W/m- • — " ^ S=200W/in^ - " " ^ 100 150 200 -1 ^ ~ \ \ 111 250 P(7*« VnKageCuives ^^-^ -^ \ T=40t: S=BOOW/m- -~-^^_ S-600W/m- \ ^ ^ S=400W/m^ • S=200W/in- X / v