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Bi tp ln hc phn: Thit k h thng iu khin in t cng sut thng 09/2014
Bi tp c trnh by trong phm v 20 trang v sinh vin phi nh km nhim v trong bi tp ln np li
Bi tp 1: Thit k h truyn ng ng c mt chiu c tham s ch ra trong Bng 1, s dng chnh lu cu ba pha iu khin hon ton s dng Tiristor (c sn tham s ng c trong th vin simpower systems/electrical machines).
Tham s ng c mt chiu 200Hp kch t c lp
in tr phn ng Ra = 0.0597
in cm phn ng La =0.0009H
in tr phn kch t Rf = 150
in cm phn kch t Lf = 112,5H
in cm h cm Laf = 2,621
Moment qun tnh J = 5kgm2
in p kch t Uf = 150V
Tc nh mc 1750 vng/pht
in cm ni tip mch phn ng ng c
Lu =15e-3H
V3
V2
iu
V6
V5
a
b
c
V1
V4
ia
Ld
380V
/50H
z
DC CKTuu Uf
S mch lc chnh lu cu ba pha cho ng c mt chiu kch t c lp
Tnh chn mch lc.
iu khin vng h, s dung hai phng php pht xung sau y iu khin mch lc cu ba pha Tiristor.
o iu khin theo phng php xung kp (SV khng phi lm phng php ny).
o iu khin theo phng php xung chum (Tn s xung chm fx = 10kHz).
Tng hp mch vng dng in, tc m bo tc ng c bm theo tc t
Bi tp ln hc phn: Thit k h thng iu khin in t cng sut thng 09/2014
Bi tp c trnh by trong phm v 20 trang v sinh vin phi nh km nhim v trong bi tp ln np li
Bi tp 2: Thit k b ngun dng dng chnh lu Tiristor, l u vo ca thit b bin i cho l nu thp trung tn M t: L nu thp trung tn c s dng rng ri ti Vit Nam, vi di cng sut nh t 100 n 750kW, cng sut ln c 1 n 10MW. B bin i thng dng cu trc chnh lu Tiristor cu 3 pha, cng vi cun khng mt chiu, to nn ngun dng, nghch lu cng hng ngun dng song song, tn s t 500Hz n 2400Hz (tn s thp ng di cng sut cao)
V3
V2
id
V6
V5
a
b
c
V1
V4
ia
Ld
C
Lt
Rt
ut
380V
/50H
z
S mch lc nghch lu cng hng ngun dng
S thay th tng ng b chnh lu cu ba pha to ngun ch ra nh , trong ngun sc
in ng e t th hin nh hng ca in p trn ti tc ng ngc li b chnh lu ngun
dng. Tn s ngun sc in ng e t bng 2 ln tn s in p ra (chnh lu cu Tiristor mt pha).
*
di PIG sdku Modulator
di
*
di PIG sdku
di
+-
dL
Ed r dku Ku
(a)
(b)
dL
e t
380 / 50V Hz
S thay th chnh lu cu ba pha to ngun dng
Bi tp ln hc phn: Thit k h thng iu khin in t cng sut thng 09/2014
Bi tp c trnh by trong phm v 20 trang v sinh vin phi nh km nhim v trong bi tp ln np li
Yu cu: o Tnh chn tham s mch lc ca chnh lu cu ba pha to ngun dng cho
nghch lu cng hng, vi ti l cun dy l in cm ng vi cc tham s sau: Cng sut ti Pt = 300kW, in p nh mc trn cun dy: Ut = 800VAC v tn s lm vic l 1kHz, h s cng sut ti cos = 0,4.
o Tng hp tham s b iu khin dng in da vo s thay th 0. o M phng kim chng bng Phn mm Matlab.
Bi tp ln hc phn: Thit k h thng iu khin in t cng sut thng 09/2014
Bi tp c trnh by trong phm v 20 trang v sinh vin phi nh km nhim v trong bi tp ln np li
Bi tp 3: Thit k b iu p xoay chiu ba pha khi ng ng c khng ng b c cng sut 215Hp, in p nh mc (pha-pha) t vo ng c 400V/50Hz, tc nh mc 1487 vng/pht (c sn tham s ng c trong th vin simpower systems/electrical machines).
IM
380V/50Hz
V1 V4 V3 V6 V5 V2
isa isb isc
S mch lc iu p xoay chiu ba pha khi ng ng c khng ng b rotor lng sc (soft
starter)
Yu cu: o Tnh chn tham s mch lc ca b iu p xoay chiu 3 pha. o Xy dng c tnh khi ng ca ng c m bo cho dng in khi ng
nm trong gii hn cho php (gii hn dng khi ng bng 3 ln dng nh mc).
o Thit k cu trc iu khin vng kn (gii hn dng khi ng bng 3 ln dng nh mc) .
o M phng kim chng bng phn mm Maltab.
Bi tp ln hc phn: Thit k h thng iu khin in t cng sut thng 09/2014
Bi tp c trnh by trong phm v 20 trang v sinh vin phi nh km nhim v trong bi tp ln np li
Bi tp 4: Thit k cu trc iu khin b bin i Buck-Boost c thng s mch lc nh di dy:
Tham s b bin i Boost
in p uin = 24V, in p ra uo = 48V in cm L = 62H T in C = 300F v rC = 0,187 Tn s pht xung fx = 100kHz. Cng sut 100W
C
rC
iL
D
V
uouin
uc
L
B bin i Buck
C
rC
DVuo
iL
uin
uc
D
B bin i Boost
R R
C
rC
L
V
uouin
uc
D
R
B bin i Buck-boost
iL
S mch lc b bin i Boost
Yu cu: 1. Xy dng m hnh tn hiu trung bnh ca cc b bin i Boost 2. Thit k cu trc iu khin cho b bin i trn theo 2 ch :
a. iu khin in p. b. iu khin dng in (iu khin dng in nh v iu khin dng in
trung bnh). 3. Kim chng kt qu m hnh ha v thit k bng phn mm Matlab
Bi tp ln hc phn: Thit k h thng iu khin in t cng sut thng 09/2014
Bi tp c trnh by trong phm v 20 trang v sinh vin phi nh km nhim v trong bi tp ln np li
Bi tp 5: Thit k cu trc iu khin b bin i Buck-Boost c thng s mch lc nh di dy:
Tham s b bin i Buck-Boost
in p uin = 24V, in p ra uo = 15V in cm L = 100H T in C = 697F v rC = 0,01 Tn s pht xung fx = 100kHz. Cng sut 100W
C
rC
iL
D
V
uouin
uc
L
B bin i Buck
C
rC
DVuo
iL
uin
uc
D
B bin i Boost
R R
C
rC
L
V
uouin
uc
D
R
B bin i Buck-boost
iL
S mch lc b bin i Buck-Boost
Yu cu: 1. Xy dng m hnh tn hiu trung bnh ca cc b bin i Boost 2. Thit k cu trc iu khin cho b bin i trn theo 2 ch :
a. iu khin in p. b. iu khin dng in (iu khin dng in nh v iu khin dng in
trung bnh). 3. Kim chng kt qu m hnh ha v thit k bng phn mm Matlab
Bi tp ln hc phn: Thit k h thng iu khin in t cng sut thng 09/2014
Bi tp c trnh by trong phm v 20 trang v sinh vin phi nh km nhim v trong bi tp ln np li
Bi tp 6: Thit k cu trc iu khin cho b bin i PFC c tham s nh sau:
in p u vo xoay chiu (RMS) Us,rms = 220V
Tn s li in f= 50Hz
in p u ra b PFC 400V
Cng sut thit k 250W
Tn s switching fs = 100 kHz
T in u ra C = 220 F rC = 100m
Gi tr in cm L = 1mH
ud
L
L
ins
uu
su
di
C R
su
si
Li
Lisi
C ou
1 :1d t
Li di
R
su
Li
ud
d t
t
t
a)
b)
c)
d)
ins
uu
S mch lc b bin i PFC
Yu cu: o Tnh chn mch lc.
o Thit k mch vng dng in va mch vng in p theo mc (Theo ni dung trong bi ging)
o Tnh ton khu b in p u vo (Feedforward voltage). o M phng bng phn mm Matlab kim chng kt qu thit k.
Bi tp ln hc phn: Thit k h thng iu khin in t cng sut thng 09/2014
Bi tp c trnh by trong phm v 20 trang v sinh vin phi nh km nhim v trong bi tp ln np li
Bi tp 7: Thit k cu trc iu khin cho nghch lu c lp ngun p mt pha c cng sut 2kVA lm vic ch chnh lu tch cc.
Tham s s mch lc nghch lu ngun p mt pha
Lng t in p mt chiu trn t Cdc Udc = 400V
Tham s in cm pha li Ls = 2mH
Tn s pht xung mch nghch lu 5kHz
S1 S3
S2S4
Cdc
a)
Ls
220V/
50Hzis
UdcTi
Li in
S mch lc nghch lu c lp ngun p mt pha lm vic ch chnh lu tch cc
Yu cu: 1. Tnh chn mch lc 2. Thit k khu iu ch rng xung theo phng php n cc. 3. Tng hp mch vng iu khin dng in theo kiu PI v PR (bi ging) 4. Tng hp mch vng in p Udc 5. M phng bng phn mm Matlab kim chng kt qu thit k.
Bi tp ln hc phn: Thit k h thng iu khin in t cng sut thng 09/2014
Bi tp c trnh by trong phm v 20 trang v sinh vin phi nh km nhim v trong bi tp ln np li
Bi tp 8: Thit k cu trc iu khin cho nghch lu c lp ngun p mt pha c cng sut 2kVA lm vic ch cp ngun.
Tham s s mch lc nghch lu ngun p mt pha
in p mt chiu t vo mch nghch lu Udc = 400V
Tham s b lc LC Lf = 0,7mH Cf = 40 F
Tn s pht xung mch nghch lu 5kHz
Lng t in p trn ti Ut(RMS) = 220V f = 50Hz
S1 S3
S2S4
Cdc
Lf
isUdc
Cf Ti
S mch lc nghch lu c lp ngun p mt pha lm vic ch c lp
Yu cu: 1. Tnh chn mch lc 2. Thit k khu iu ch rng xung theo phng php n cc. 3. Tng hp mch vng iu khin dng in theo kiu PI v PR (bi ging) 4. Tng hp mch vng in p trn ti. 5. M phng bng phn mm Matlab kim chng kt qu thit k.
Bi tp ln hc phn: Thit k h thng iu khin in t cng sut thng 09/2014
Bi tp c trnh by trong phm v 20 trang v sinh vin phi nh km nhim v trong bi tp ln np li
Bi tp 9: Thit k cu trc iu khin cho nghch lu c lp ngun p ba pha c cng sut 5kVA lm vic ch chnh lu tch cc
Tham s s mch lc nghch lu ngun p ba pha
Lng t in p mt chiu trn t Cdc Udc = 700V
Tham s in cm pha li Ls = 2mH
Tn s pht xung mch nghch lu 5kHz
S1 S3 S5
S2S6S4
Cdc
b)
Ls
isUdc
Ti
Li in
380 / 50V Hz
S mch lc nghch lu c lp ngun p mt pha lm vic ch chnh lu tch cc
Yu cu: 1. Tnh chn mch lc 2. Thit k khu iu ch rng xung theo nguyn l iu ch vector khng gian. 3. Thit k mch vng iu khin dng in theo nguyn l iu khin vector dng in is (la chn iu khin theo cu trc PR trn h ta tnh hoc PI trn h ta quay dq) . 4. Tng hp mch vng in p Udc 5. M phng bng phn mm Matlab kim chng kt qu thit k.
Bi tp ln hc phn: Thit k h thng iu khin in t cng sut thng 09/2014
Bi tp c trnh by trong phm v 20 trang v sinh vin phi nh km nhim v trong bi tp ln np li
Bi tp 10: Thit k cu trc iu khin cho nghch lu c lp ngun p ba pha c cng sut 5kVA lm vic ch cp ngun.
Tham s s mch lc nghch lu ngun p ba pha
in p mt chiu t vo mch nghch lu Udc = 700V
Tham s b lc LC Lf = 0,7mH Cf = 40F
Tn s pht xung mch nghch lu 5kHz
Lng t in p trn ti (pha-pha) Ut(RMS) = 380V f = 50Hz
S1 S3 S5
S2S6S4
Cdc
b)
Lf
isUdc
Cf
Ti
S mch lc nghch lu c lp ngun p ba pha lm vic ch c lp
Yu cu: 1. Tnh chn mch lc 2. Thit k khu iu ch rng xung theo phng php n cc. 3. Thit k mch vng iu khin dng in theo nguyn l iu khin vector dng in is (la chn iu khin theo cu trc PR trn h ta tnh hoc PI trn h ta quay dq). 4. Thit k mch vng iu khin in p trn ti theo nguyn l iu khin vector in p us (la chn iu khin theo cu trc PR trn h ta tnh hoc PI trn h ta quay dq). 5. M phng bng phn mm Matlab kim chng kt qu thit k.