Nguyen Hien Truns; lap chi KHOA HOC & CCiNG NGHE 90(02), 119- NAN(; CAO CHAT LUONG DIET KHIEN ON DINH HE THONG DIEN BANG BO DIEl K H I E N THIET KE THEO EV THU\ ET TOI I E RHoo Nguyen Hicn T r u n g * Tnrirng Dm hoc KTC\ DH Thai \giiyeii lOM T A I ' Bai bao niiy trinh biiy phuong phap thiet ks; bp dieu khicn dn dinh he thdng dien (PSS- Power System Stabili/er) theo Iv lluiycl tdi uu RH, de nang cao chat krpng dn dinh he thdng dien (11 I'D) Bp dieu khien PSS thiet kc dupc tdi uu ca vc tham sd va cau triic Kv thuiit giai bai loan Idi uu RII, d diiy dupc thirc hiijn thdng qua giai bai loan cin bang md hinh j j Kel quii mo phdng Mallab cho thay ro hieu qua ciia bp dicu khien so voi ciic bp dicu khien PSS truyen thdng nhiit lil vice giam cac dao ddng tan sd thiip cua he thdng dicn (LFOs), Til" khoa: Miiy phdl dnjn ddng be), he thdng kich tir bd dii'it khien dn dinh he thdng dien d'SSt dao dc)ng ldn sd thdp dieu khii'n ben virng l)AT\'AN DL I Os la cae dao ddng gdc I'otor ctia may phit cd liin sd nam tning khoang 0.1-311/ | | 113J Vice sir dung kich lir dp khueeh did cao kich tir dicu chmh kem, etic bd nglijck luu IIVDC koac SVC cd Ike tiio LFOs vdi sir dap tiit (damping) iim, vin de thudc biii lotiii dn dinh tin kidu nko Fl O s bao gdm eac kicii sau day: kieu cue bd, kieu dieu kkien kieu xoan gav sir Urong tie giira cae tliic'l bi CO va dien cua lie thdng turbine - nuiv pluil vdi nhau; ngoai cdn cd kidu dao ddng ken kku vuc gav boi kick lir dp khueeh diii cao lioiic tiiiyen tai cdng siuil Idn qua dirdng diy lai dicn yen I I Os cdn cd Ihc liio tiV ciic nkieu loan nko Irong he thdng (sii thav ddi tai) vi chung dupe nluin dang, pluin lich tkdng qua ly lluiycl dn djnh lin hicu nho Cac nhicu loiin nlio luiv kim cko gdc rotor cua iiu'iy pkat co tke uing koac giam, ki nguyen nhan cua sir Ihieu md men ddng bd koiic tkieu md men damping | | dieu khien dien ap AVR De cai tkien su tiit diin PSS phai lao lluink pluin md men dicn cung pka vdi sai lech ldc rotor \;'; Hon ntia PSS pkai ed mack bii pha thich htip de bii vao sii Uc pha giira diiu vio kich lir va dau md men dien Ikiii kel eiic PSS hien sir dung U'ong miiy phat deu cd Ciiu Inic I.cad-Lag ehiing kiin nlur PSSI,\ PSS.\A PSS3B PSS4B | 1| Iham sd eac loai PSS luiy ileii nka san xuat cung dip Hicn CO kka nhieu cac liiiin diem rieng re eho vice ckpn tluim so cua PSS vdi ciiu tnic Lead-Lag nlur: Sir dung pkan lick ).i dc ckpn tkam sd ckp PSS 11 1|; Ap dtmg tdi uu Lf^R de dc chgn tham so cho PSS 19) [12]: Chpn tham so tdi uu H, dip PSS 119| , Tu dav ed the nhiin Uuiy rang cac pkuong pluip chpn tkam so Uen chi su dting dupe kki PSS ki khau Lciid-lag Mill kluic ciiti true cad-Lag ki don gian lien dimg song kkdng ihe diip duge eae dao ddng khac ndi each khae nd chua pkai la bd dicu khien tdi iru ve ciiu true Giai pluip iniyeii ikdng de dn dinh tin kieu nko ki su dung PSS 16] | 17] \'c co ban PSS CO eliiic luing cluing ki cai tkien sii liil dan ddi voi die dao ddng rotor cua nuiv pluil biing cich dieu kkic-ii kich tir sii dung lin liieii dien ap \'i„,^ dua tkem vao nuidi vdng dieu kkien Biii biio dat nhiem vu thiet ke bd dicu khien PSS tdi uu c:i ve tkam sd va cau true C dng cu ly tluiyet eho vice ihicl ke bd dieu khien la Iv lluiyet tdi uu RIL Kel qua md pkong tmng Mallab cho lluiy rd kha niing vupl trdi cua bd didu khien PSS Uii uu RIL nav so voi eic bd dicu khien Lead-Lag ti'uycn III ii''!2 s.sf'.s f^ Email ngiirenhientnmg u tinil edu rn thdnii ve kka iiiina dn dinh nhicu loan nho 19 M O H I N H I O X N HC.iC ) (6) tac tdi uu RH, dupc md ta o hnh \ oi ky hieu , ^ \,i \,.) cac AA bien trang \/'.' , I thai la Nguyen Hien Irumi •fap chi KHOA HOC & CONG NGHE cting nhu dau vao (lin bieu dicu khicn) " - \ L,,.,., ; dau dugc ;; = Nr-i dau (khdng mong mudn) z - \S ; dau vao (nhieu) /): NT,,, tbi md hinh tuyen tinh kda xung quank dicni lam v iec cua 11 FD da cd o" tren se V let lai duge ihiink dang ckung: ;• =.l r l\py Bjif (9) ,-.=C,, I l\,pyD,,u (10) !I^-Cyi_ • D,^py l),-.ii (II) •5,(s) ,S'|,(s), ,.5',,(.S) 5';.(,S), (D ^, ,(,s/ \)'(C.B)i\6) Tdng hop hd dieu khii'n ldi tru RIF Bd dieu kkien tluct ke qua hai budc: Budc 1: \ d i edng cu hd trg cua Mallab vi thdng so cac pkan tu eho a phan phu luc III theo (16) ta tinh dugc: , S , , ( s ) S',,(,s) .S',,(,s) A',,(,s) pi\l.) (1'7) 2( \d) ui \V,s s) * Kich tu, AVK vii miiy phiit S'is; \'i tat ca cac diem cue eua (17) deu cd phiin tkuc lim nen ddi tuci'iig da dn dinh, Ouaii he giu'a cac thank pluin can ihicp dugc eua bd dieu kkien ki it dugc bieu dien hoi | I) : '/I sn/) B(') dieu khien hi'n v u n g R(s) G „ _ S ' „ ( | t S',,A') ' Hinh .Sa di) khdi bdi todn dli'u khien ldi ini RH irong nghien ciru (18) va quan he giira cac thank phan khdng can thiep dirpc cua bp dieu khien la /) > -; dupe bicu dicn boi: (,',, day ding ki md kink ikiriTng dugc sir dung voi cdng cu Ml | | , | | cua dicu khicn ben virng Ta cd the giii thiet mdl each long quit cko he bac /;, vdi v ki vector eic Iriiiig tkai he liidng ;; e R ' " ki lin kieu dieu kkien diiu vao z ki V cclor cac tin kieu kkdng mong mudn; /) ki vector eac dau vao nhicu; ,(/e R"'la lin hieu diiu clo liiiing dugc, liiv nkien ddi lu'iTng hai dau vao kai diiu a day vdi B^-B: « , < ' : ( ' , /);(• A va /i,, / ) , /)., D^-i) tki md hinh tren tra lluink ,s',, ,S,.A(I ,.S',,/,') ',s',, (19, Mue tieu ki lim bd dieu kkien AI pliii lliude tham sd O vdii^c RH dc (18) dn dink, va (19) dua dupe ve diing 7' T * () De don gian ta chgn A'(U,s'.,y?) ' Qzr>R -i^(\ S.,()) ' (20) ,i~- ,!;• yBn^Cp (12) Thav (20) vao (18) ta dupe G,, ^ ()- S„()) (;.- dn dink (,S'' va O deu isn djnh) nen (20) ki bd dii;u khicn ckiip nluin dugc vdi mgi O la pluin tir cua RIL Budc 2: c = /> (13) Thay (20) vao (19) dugc bai loan tdi uu ;/ (14) Al' c\o cac ma liiiii be so A cko a pku Iue I Mo hinli luiv lirani; duoim voi 'fi-l ' 90(02): 119- 124 S,(s) SAA I'i-) FA'-) s,4A lfi ) \\T - ri)\\^ >min (21) do: Ti-) s',,(,s) A(,s)-6',2(.s)*.s,|(,s) (22) (23) (1-^) ,s'|,(.) .s', ( s ) s,|(s) .s',.(,s) dugc tinh tli cac ma triin he so (I2)-(14) nlur sau: Vii voi ddi luting dang xet thi ca I'is) ( (\) deu la cac ham ben Mat khac vdi kc dang khao sal va T I '?RH, i Vv; khdng ed mdt diem khdng nap iiiiiu ben phai true ao Bai v ay iheo 11 | ta ed: Niiuven Hien Trun2 ;, ^ ^ i L i I ' i J ^ ' : ! (24) F(-~) A(s) \ o i A(s)la da thuc bac 12 va A(s) la da thitc bac 7, \ i (J kkdng hgp tkirc {(.) s RH ) nen tkeo [1 | bang each chia mau so cua (24) eho da thirc bac ta co nithiem can tdi uu - _ " If 90(02): 19- 124 Tap chl KHOA HOC & CONG NGHE dieu kkien cin dinh HTD thdng thudng (CPSS) Vii su dunsi bp dieu khicn PSS RII (ky k eu ki PSS I-,) Fi -) ('^-D' F(-) (25) vdi 0.03 (I X > nhdtiiv y) Rd riing ',' hop thire va ben Thay (l~) (25) viio (20) ta duoc ham truyen bd dicu khicn /?(s)= V(-) Dc) 126) Hinh Diip irng giic lui \ oi A( NI va /)(V) lii Ciic da thirc bac 28 Giam hgc hd dieu khien Bd dieu khien vdi bac 28 rat khd tbuc hien thuc te Ta sO giam bac cho nd biing ky thuat giam biic tkeo chuan Hankel |16] \ oi cdng cu hd trcT eua Mallab vice giam hac nav la thu duoc bd dieu kkien sau giam bac la; \-v, -92 89s 485.1s "56's' 1hoi gian (sec) -2.8O9c0()ls - ; OOOcOOts' - 53.51s Hinh Ddp irng s,ti lech giic fut Id •'22e-013 Ills,- }~ ^ -2.1SA'-0I Is * 566.9s - 5136s 506c-()26 341 Os \U)PHONG •.•.••i-^yu: - Dc kiciii chung bp dieu khicn la xay dung so dd md phong Mallab nku hinh ^SS CPSS PSS '( r f Hinh " Ddp irng sut lech tiic dd.lcj Hinh .S" • !