Modified UPQC for Compensation Power Quality Problems Using MLI with Modified PWM Method

Transcription

1 ISSN(Online) : ISSN (Print) : nineerin nd Tehnoloy (n ISO 397: 7 ertified Orniztion) Vol. 5, Issue 3, Mrh 6 Modified UPQ for openstion Power Qulity Proles Usin MLI with Modified PWM Method lrsn P, Sthyurthy K PG Sholr, Dept of, rinr nn Institute of Siene nd Tehnoloy, henni, Indi ssistnt Professor, Dept of, rinr nn Institute of Siene nd Tehnoloy, henni, Indi STRT: The unified power qulity onditioner (UPQ) is usto power deie, whih itites olte nd urrentrelted PQ issues in the power distriution systes. In this projet, UPQ topoloy for pplitions with nonstiff soure is proposed. The proposed topoloy enles UPQ to he redued hronis. In this projet the unified power qulity onditioner (UPQ) dels with solution to openste the olte ss nd swells nd to protet sensitie lod In order to pply the MLI in the distriution systes with olte in rne of kiloolts, series onerter s one of the iportnt oponents of UPQ should e ipleented sed on the ultileel onerters whih he the pility to hndle olte in the rne of kiloolts nd power of seerl ewtts. So, in this projet onfiurtion of UPQ sed on syetril sde Multiell onerter is proposed. The in property of this syetril M onerter is inrese in the nuer of output olte leels with redued nuer of swithes. lso, the pres openstion strtey nd the proposed olte s/swell detetion. KYWORDS: FTS, SSS,SV, IPF, S, UPF, UPQ, STTOM. I. INTRODUTION With the dneent of power eletronis nd diitl ontrol tehnoloy, the renewle enery the prolifertion of the power eletronis deies, nonliner lods nd unlned lods he derded the power qulity (PQ) in the power distriution network. usto power deies he een proposed for enhnin the qulity nd reliility of eletril power. Unified PQ onditioner (UPQ) is erstile usto power deie whih onsists of two inerters onneted ktok nd dels with oth lod urrent nd supply olte iperfetions. UPQ n siultneously t s shunt nd series tie power filters. The series prt of the UPQ is known s dyni olte restorer (UPQ 5 MLI). It is used to intin lned, distortion free noinl olte t the lod. The shunt prt of the UPQ is known s distriution stti openstor (DSTTOM), nd it is used to openste lod retie power, hronis nd lne the lod urrents therey kin the soure urrent lned nd distortion free with unity power ftor.volte rtin of dlink pitor lrely influenes the openstion perforne of n tie filter. In enerl, the dlink olte for the shunt tie filter hs uh hiher lue thn the pek lue of the linetoneutrl olte. This is done in order to ensure proper openstion t the pek of the soure olte. The uthors entioned out the urrent distortion liit nd loss of ontrol liit, whih sttes tht the dlink olte should e reter thn or equl to 6 ties the phse olte of the syste for distortionfree openstion. Due to the foreentioned riteri, ny reserhers he used hiher lue of d pitor olte sed on pplitions Siilrly, for series tie filter, the dlink olte is intined t lue equl to the pek of the linetoline olte of the syste for proper openstion.to redue the dlink olte store pity, few ttepts were de in literture. hyrid filter hs een disussed for otor drie pplitions. The filter is onneted in prllel with diode retifier nd tuned t seenth hroni frequeny. lthouh n elent work, the desin is speifi to the otor drie pplition, nd the retie power openstion is not onsidered, whih is n iportnt spet in UPQ pplitions. In se of the threephse fourwire syste, neutrllped topoloy is used for UPQ. This topoloy enles the independent ontrol of eh le of oth the shunt nd series inerters, ut it requires pitor olte lnin. Fourle VSI topoloy for shunt tie filter hs een proposed for threephse fourwire syste. This opyriht to IJIRST DOI:.568/IJIRST

2 ISSN(Online) : ISSN (Print) : nineerin nd Tehnoloy (n ISO 397: 7 ertified Orniztion) Vol. 5, Issue 3, Mrh 6 topoloy oids the olte lnin of the pitor, ut the independent ontrol of the inerter les is not possile. To oeroe the proles ssoited with the fourle topoloy, the uthors proposed Tonneted trnsforer nd threephse VSsed DSTTOM. Howeer, this topoloy inreses the ost nd ulkiness of the UPQ euse of the presene of extr trnsforer. In onentionl leels ultileel inerter is ipleented ut hronis is injeted. So, we he ipleent 5 leel in proposed syste. II.LITRTUR SURVY The unified power qulity onditioner (UPQ) is usto power deie, whih itites olte nd urrentrelted PQ issues in the power distriution systes. In this projet, UPQ 5 leel MLI topoloy for pplitions with nonstiff soure. This projet dels with dyni olte restorer (UPQ 5 MLI) s Solution to openste the olte ss nd swells nd to protet sensitie lods. Multileel onerters re ery interestin lternties for ediu nd hihpower pplitions. Here we deeloped n iproed onfiurtion of doule flyin pitor Multiell (DFM) onerter. The enefits of this new onerter oprin with onentionl DFM, re doulin of the nuer of output olte leels nd iproin the output olte frequeny spetru.multileel onerters re ery interestin lternties for ediu nd hihpower pplitions. Here we deeloped n iproed onfiurtion of doule flyin pitor Multiell (DFM) onerter. The enefits of this new onerter oprin with onentionl DFM, re doulin of the nuer of output olte leels nd iproin the output olte frequeny spetru. III. PROJT DSRIPTION To redue hronis of iruit, we he ipleented 5 leel MLI is pplied. Fi. Norl Pw ethod with 8 swithes for leel inerter PROPOSD SYSTM. Modified Pw ethod with swithes for 5 leel inerter..5 leel inerter injetin UPQ deies or Stto for openstion power qulity proles. opyriht to IJIRST DOI:.568/IJIRST

3 ISSN(Online) : ISSN (Print) : nineerin nd Tehnoloy (n ISO 397: 7 ertified Orniztion) Vol. 5, Issue 3, Mrh 6 Fi lok dir Unified Power Qulity onditioner (UPQ) is deie tht is siilr in onstrution to Unified Power Flow onditioner (UPF). The UPQ, just s in UPF, eploys two olte soure inerters (VSIs) tht onneted to D.. enery store pitor. One of these two VSIs is onneted in series with.. line while the other is onneted in shunt with the.. syste. UPQ tht oines the opertions of Distriution Stti openstor (DSTTOM) nd Dyni Volte Reultor (UPQ 5 MLI) toether. One of the serious proles in eletril systes is the Inresin nuer of eletroni oponents of deies tht re used y industry s well s residenes. These deies, whih need hihqulity enery to work properly, t the se tie, re the ost responsile ones for injetions of hronis in the distriution syste. Therefore, deies tht soften this drwk he een deeloped. One of the is the unified power qulity onditioner (UPQ), It onsists of shunt tie filter toether with seriestie filter. This ointion llows siultneous openstion of the lod urrents nd the supply oltes, so tht opensted urrent drwn fro the network nd the opensted supply olte deliered to the lod re sinusoidl, lned nd iniized. The series nd shunttie filters re onneted in ktok onfiurtion, in whih the shunt onerter is responsile for reultin the oon Dlink olte. Fi. 3 Generl onfiurtion of the Unified Power Qulity onditioner UPQis eployed in power trnsission syste to perfor shunt nd series openstion t the se tie. power distriution syste y ontin unlne, distortion nd een D.. oponents. Therefore UPQoperte, etter Thn UPF, with ll these spets in order to proide shunt or series openstion. The UPQ is reltiely new deie nd not uh work hs yet een reported on it. Soeties it hs een iewed s ointion of series nd shunt tie filters. opyriht to IJIRST DOI:.568/IJIRST

4 ISSN(Online) : ISSN (Print) : nineerin nd Tehnoloy (n ISO 397: 7 ertified Orniztion) Vol. 5, Issue 3, Mrh 6 FIG. 4 quilent iruit For UPQ Tkin the lod olte, VL s referene phsor nd suppose the lin power ftor of the lod is osφlwe n write; V =V I =I θ V = V (k) Where ftor k represents the flutution of soure olte, defined s, K= The olte injeted y series PF ust e equl to, = =k The UPQ is ssued to e lossless nd therefore, the tie power dended y the lod is equl to the tie power input t P. The UPQ proides nerly unity power ftor soure urrent, therefore, for ien lod ondition the input tie power t P n e expressed y the followin equtions, p =p V.i =V.i.os θ V (k). i =V.i.os θ The oe eqution suests tht the soure urrent is depends on the ftor k, sine φl nd ilre lod hrteristis nd re onstnt for prtiulr type of lod. The oplex pprent power sored y the series PF n e expressed s, s =. P =. i.os θ =k.. i.os θ q =.i.sin θ φs=, sine UPQ is intinin unity power ftor P =.i =k..i q = The oplex pprent power sored y the shunt PF n e expressed s, S =V.i opyriht to IJIRST DOI:.568/IJIRST

5 ISSN(Online) : ISSN (Print) : nineerin nd Tehnoloy (n ISO 397: 7 ertified Orniztion) Vol. 5, Issue 3, Mrh 6 The urrent proided y the shunt PF, is the differene etween the Input soure urrent nd the lod urrent, whih inludes the lod Hronis urrent nd the retie urrent. Therefore, we n write; i =i i i =i i θ i =i (i.os θ ji.sin θ )=(i i. os θ )ji. sin θ p =V. i.os θ =V.i.sin θ q =V. i. sin θ =V.i.sin θ sed on the oe nlysis the different odes of opertion re disussed ) No UPQ ) With Shunt PF Fi. 5 Retie Power Flow The retie power flow durin the norl workin ondition when UPQ is not onneted in the iruit is shown in the Fi.(). In this ondition the retie power required y the lod is opletely supplied y the soure only. When the UPQ is onneted in the network nd the shunt PF is put into the opertion, the retie power required y the lod is now proided y the shunt PF lone; suhtht no retie power urden is put on the ins. So s lon s the shunt PF is ON, it is hndlin ll the retie power een durin olte s, olte swell nd urrent hroni openstion ondition. The series PF is not tkin ny tie prt in supplyin the lod retie power. The retie power flow durin the entire opertion of UPQ is shown in the Fi. (). In this se no tie power trnsfer tkes ple i UPQ, tered s Zero tie Power onsuption Mode. If the lod is non liner one produin hronis, in suh ses the shunt PF injets urrent equls to the su of hronis urrent ut in opposite diretion, thus nellin out ny urrent hronis enerted y non liner lod. Durin this urrent hronis openstion ode of opertion the shunt PF does not onsue ny rel power fro the soure sine it injeted only hronis urrents. Here Phsor represents the norl workin ondition, onsiderin ledin power ftor nle of the lod. Durin this ondition iswill e extly equl to the il. When shunt PF is put into the opertion, it nels out the rs enerted y lod y injetin 9 lin urrent suh tht the soure urrent will e in phse with the terinl olte. The phsor representin this indutie effet is shown in Fi.3.8 the phsor representtions durin olte s nd olte swell ondition on the syste re shown in the Fi.3.9 nd Fi. 3. respetiely. Vrition of nle FShdurin different odes of opertions of UPQ, represented y zones. Fiure onsists of seen zones of opertions. The x xis represents the referene lod olte wheres the shunt PF openstin urrent n ry fro to 36. If the lod is pure resistie, shunt PF does not injet ny openstin urrent sine there is no retie power dend fro the lod, this ondition is represented y zone I. onsiderin the se of indutie lod, the lod r requireent is supplied y shunt PF y injetin 9 ledin urrent. opyriht to IJIRST DOI:.568/IJIRST

6 threephsesupply V S S MOS45 MOS46 MOS47 MOS5 sr Sr S3r S J Jr J S3 Jr MOS35 MOS36 MOS37 MOS4 MOS5 MOS4 MOS53 MOS48 MOS43 MOS38 MOS5 MOS54 MOS49 MOS4 MOS44 MOS39 ISSN(Online) : ISSN (Print) : nineerin nd Tehnoloy (n ISO 397: 7 ertified Orniztion) Vol. 5, Issue 3, Mrh 6 IV. IRUIT TOPOLOGY Fi. 6 Proposed Inerter iruit typil UPQ 5 MLI for olte s/swell openstion is shown in Fi. 4.. When the supplyside olte hnes the UPQ 5 MLI injets series olte to intin the nitude of the lod olte t its referene lue. The UPQ 5 MLI is essentilly oltesoure onerter tht produes n output olte nd injets it in series with the supply olte. Note tht the olte injetion lso results in the supply or sor of tie nd retie power. Retie power n e supplied without tkin enery fro the dside pitor; howeer, n tie power supply ust inole the exhne of stored enery. The series onerter onsists of threephse oltesoure onerter or three sinlephse oltesoure onerters. It strts to injet three sinlephse openstin oltes in series into the power line s soon s olte s or swell ours. In this projet, syetril M onerter, introdued in [3], sed UPQ 5 MLI is proposed to inrese the nuer of output olte leels nd s result, redue the output olte THD nd ke it possile to ipleent UPQ 5 MLI in the distriution systes with olte in rne of kiloolts. new 5 leel syetril M onerter is shown in Fi.. The in property of the new onfiurtion of syetril M onerter in oprison with the onentionl syetril M onerter is redution in the nuer of required hihfrequeny swithes y 5 perent while only 4 lowfrequeny swithes re dded. s result, the ost, size nd the power loss of the new onfiurtion of syetril M onerter is deresed. The onfiurtion of UPQ 5 MLI sed on onfiurtion of 5leel syetril M onerter is shown in Fi. 4.. ONTROL STRTGIS syetril sde Multiell onerter ontrol Strtey The entioned onfiurtion of syetril M onerter is ontrolled y leel shifted sinusoidl pulse width odultion (LSSPWM), s shown in Fi. 4, while the solute of the referene sinl is interseted with the leel shifted trinle rriers. The lowfrequeny swith (J) is on for positie referene sinl nd is off for netie referene sinl. ll sttes of swithes re illustrted in detils in TleI.. Volte S/Swell openstion Strtey To oid trippin of the lod, the plitude nd phse nle of the lod olte hs to e restored y the UPQ 5 MLI. Different strteies n e used to hiee this ol. opyriht to IJIRST DOI:.568/IJIRST

7 ISSN(Online) : ISSN (Print) : nineerin nd Tehnoloy (n ISO 397: 7 ertified Orniztion) Vol. 5, Issue 3, Mrh 6 In this, the SRF, whih is proposed in,is used to detet the olte ss/swells nd deterine the UPQ 5 MLI referene injeted olte. t the einnin, the olte s/swell ust e deteted nd then, the UPQ 5 MLI referene injeted olte ust e deterined. Fi. 7 Leel Shifted Sinusoidl Pulse Width Modultion. sttes of swithes nd output olte for 5leel syetril sde Multiell onerter. where, rid V, rid V, rid V re the esured lineneutrl rid oltes of phses, nd, respetiely nd d rid V, q rid V,, rid V re the doponent, qoponent nd zerooponent of rid oltes in the SRF, respetiely. lso, the rs lue (lineneutrl) of lned rid olte (rid V ) n e lulted usin the doponent nd qoponent of rid oltes s follows: Then, the phse nle of phse olte in the pres stte (helthy stte) is stored s the referene nle s follows: opyriht to IJIRST DOI:.568/IJIRST

8 ISSN(Online) : ISSN (Print) : nineerin nd Tehnoloy (n ISO 397: 7 ertified Orniztion) Vol. 5, Issue 3, Mrh 6 oponents of rid oltes in the SRF, respetiely. In the se of sinle phse olte s/swell or unlned three phse olte s/swell, the zerooponent of rid oltes in the SRF is not nil. Therefore, it n e used s preter to detet the olte s/swell. Howeer, in the se of lned three phse olte s/swell, the zerooponent of rid oltes in the SRF is nil nd only the rs lue of lned rid olte in the s/swell stte hnes. euse of tht, it is neessry to use the rs lue of lineneutrl rid oltes (rid V ) otined fro () s nother preter to detet the olte s/swell. Finlly, the followin proposed lorith sed on two steps is perfored itertiely to detet the olte s/swell: Step: The zerooponent of rid oltes in the SRF whih is otined fro () is nlyzed. If it is not equl zero, it ens tht the unlned olte s/swell is ourred. So, the olte s/swell is deteted nd then, exit the lorith. If the zero oponent is equl to zero, o to step. The nil zerooponent ens tht the rid oltes re lned. So, the rs lue of rid oltes ust e nlyzed s step. Step: The rs lue of lineneutrl rid oltes (rid V ) otined fro () is opred with the referene rs lue of lineneutrl rid oltes ( ref rs V ). If they re not equl to eh other, it ens tht the olte s/swell is ourred. So, the olte s/swell is deteted nd then, exit the lorith. If there is no differene etween the, o to step. Usin the lned or unlned olte s/swell. fter the detetion of olte s/swell, the referene rs lue of lineneutrl rid oltes (ref rs V ) nd the otined referene nle (ref θ ) re used to deterine the lues of referene rid oltes in the SRF s follows: explined lorith kes it possile to detet ny opyriht to IJIRST DOI:.568/IJIRST

9 pow erui D is ret e, s = 5e 5 s. N Volt e S oure Th ree Phse Series RL r nh V I IN PUT VO LTG three phse inerter V M _ V_I I P_ Q V M _ V_I I P_ Q SOU R V4 ThreeP hse Trnsforer (Two Windins) 3 Lf3 f I 5 LV L SYMM RIL M ONV RTR injeted trnsforer Lf D Lf Lf4 V I G RID Kr s Kr si V M _V_I I P_Q PQ &VI5 lod on n on n on n3 ISSN(Online) : ISSN (Print) : nineerin nd Tehnoloy (n ISO 397: 7 ertified Orniztion) Vol. 5, Issue 3, Mrh 6 V. SIMULTION RSULTS Thr eep hse Pr or le Th ree Phse V I Mesureen t Lin er Tr nsfor er Lin er Trn sfor er V 4 D Fi. 8 Siultion iruit Dir x V olt e(v) Tie(se) Fi.9Input S Volte of Proposed Method 6 4 V o lt e V ) Tie(s e) Fi. Input S urrent of Proposed Method opyriht to IJIRST DOI:.568/IJIRST

10 ISSN(Online) : ISSN (Print) : nineerin nd Tehnoloy (n ISO 397: 7 ertified Orniztion) Vol. 5, Issue 3, Mrh 6 4 x 4 3 openste Volte(V) Tie FIG.6.4 OMPNSTD SG VOLTG OF PROPOSD MTHOD urrent(i) Tie(se) FIG.6.5 OMPNSTD SG URRNT OF PROPOSD MTHOD.5 x PF Tie(se) FIG.6.6 SG PF OF PROPOSD MTHOD M LI Tie(se) FIG.6.7 MLI OF PROPOSD MTHOD opyriht to IJIRST DOI:.568/IJIRST

11 4 D 5 D S S Sine We on stn t j j > = Rel ti on l O pe rt or7 S S S S j j Sine We S S on stn t S3 S3 j j >= Sine We4 Re lt ion l Ope r tor o nst nt S S S 3 j j > = Rel tio n l Op er to r S S j j sine we Susyste sine we Su syste sine we Su sy ste j j s s s s s3 s33 S3 S3 S3 sine w e Su syste 5 sine w e Su syste 4 sine w e Su syste 3 s s s s s3 s33 sin e w e Su syste 6 sin e w e Su syste 7 sine w e Su syste 8 s s s s s 3 s33 3 ISSN(Online) : ISSN (Print) : nineerin nd Tehnoloy (n ISO 397: 7 ertified Orniztion) Vol. 5, Issue 3, Mrh 6 FIG.6.8 MLI IRUIT OF PROPOSD MTHOD FIG.6.9 SWLLS VOLTG OF PROPOSD MTHOD FIG.6. SWLL URRNT OF PROPOSD SWLL MTH 4 x 4 3 o p e n s t e d o lt e in s w e ll Tie(se) FIG.6. OMPNST VOLTG OF PROPOSD SWLL MTHOD opyriht to IJIRST DOI:.568/IJIRST

12 N V olte Soure Di sre te, Ts = e 5 s. po werui V I SO UR V SOUR I V V V V reker f SRIS PULS s dete s dete pulse Su syste I Lf reker s reker So pe D Volte k Su syste k Out k V Su syste 3 Out Su syste 5 Out I NO T NO T NO T L f3 in jet ed tr nsfor e r V J V I INJT D VO LT G ND URRNT I So pe 6 S S S V Out L f Su syste Out Out Su syste 6 Su syste 4 M P h se I V I RL RL 3 5 NO T 8NO T s V non liner lod I M P h se 7 4 Sop e Sop e Sop e3 ISSN(Online) : ISSN (Print) : nineerin nd Tehnoloy (n ISO 397: 7 ertified Orniztion) Vol. 5, Issue 3, Mrh o p e n s t e ( u rr e n t ) Tie(se) FIG.6. OMPNST URRNT OF PROPOSD SWLL MTHOD FIG.6.3 XISTING IRUIT DIGRM 5 Seleted sinl: 35 yles. FFT window (in red): 3 yles Tie (s) Fundentl (5Hz) =.9434, THD= 9.8% M (% of Fundentl) Frequeny (Hz) FIG.6.4 XISTING THD VLU opyriht to IJIRST DOI:.568/IJIRST

13 ISSN(Online) : ISSN (Print) : nineerin nd Tehnoloy (n ISO 397: 7 ertified Orniztion) Vol. 5, Issue 3, Mrh 6 5 Seleted sinl: 35 yles. FFT window (in red): 3 yles Tie (s) 5 Fundentl (5Hz) = 398.7, THD= 6.5% M(%of Fundentl) Frequeny (Hz) FIG.6.5 PROPOSD THD VLU VI. ONLUSION Volte ss/swells re jor proles in power systes due to the inresed intertion of sensitie lods into the. UPQ 5 MLI systes re le to openste these olte ss/swells.euse the ulti ell onerters re ery interestin for hihpower/ediuolte pplitions, nd lso onsiderly iproe the output olte frequeny spetru, in this projet onfiurtion of UPQ 5 MLI sed on syetril M onerter hs een proposed to iproe the qulity of UPQ 5 MLI output olte nd to e used in the distriution systes with olte in rne of kiloolts. In the proposed onfiurtion of UPQ 5 MLI, nuer of required hihfrequeny swithes is redued y 5 perent. Therefore, the ost, size nd power loss re deresed. lso, new ethods sed on the SRF he een used to detet the olte s/swell nd deterine the referene series injeted olte of UPQ 5 MLI. s depited in siultion results, the pres openstion strtey nd the proposed SRF sed detetion nd deterintion ethods show exellent perforne nd ood dyni response tie. RFRNS [] Perforne nlysis of Iproed Doule Flyin pitor Multiell onerter, l Philoiy L, Srnn., Nrsin.P,Interntionl Journl of erin Tehnoloy nd dned nineerin,(issn 5459, ISO 9:8 ertified Journl, Volue 3, Issue 7, July 3). [] Modified ThreePhse FourWire UPQ Topoloy With Redued DLink Volte Rtin, Srinis hskrkrnki, NeshGeddd, I trnstions on power eletronis, ol. 3, no. 6, Noeer 8 [3] Volte S nd Swell openstion with UPQ 5 MLI sed on syetril sde Multiell onerter,s. Msoudrkti,I trnstions on power deliery, ol. 3, no., pril 8. [4] Perforne nlysis of Iproed Doule Flyin pitor Multiellonerter,lPhiloiy, Srnn., Nrsin,SVIR Septeer 6.. [5] M.R.nei, S.H.Hosseini, S.Khnohdi nd G..Ghrehpetin, Verifition of new enery ontrol strtey for dyni olte restorer y siultion, lseier Journl of Siultion Modelin Prtie nd Theory, ol. 4, no., pp. 5, Fe. 6. [6] S.H. Hosseini,.KhoshkrSdih nd G. Ghrehpetin, Flyin pitor ultiell onerter sed DVR with enery iniized openstion strtey, in Pro. of 6th Int. onf. LO, No. 9, urs, Turkey, pp. 5. [7] S.H. Hosseini,. KhoshkrSdih nd. Shrifi, stition of flyin pitors oltes in ultiell onerters, in Pro. 6th Interntionl onferene TION, Ptty, Thilnd, My 9, pp. 3. [8].KhoshkrSdih,.ei, S. H.Hosseini nd M. Frst, Dyni olte restorer sed on stked ultiell onerter, in Pro. of ISI, Ot. 9, Kul Lupur, Mlysi, pp. 6. [9]. KhoshkrSdih, S. H. Hosseini, S. M. rkti nd G. Ghrehpetin, Flyin pitor ultiell onerter sed dyni olte restorer, in Pro. of 4st NPS, Ot. 9, Mississippi Stte, US, pp. 6. [9].KhoshkrSdih, S.H. Hosseini, S.M. rkti nd G. Ghrehpetin, Stked ultiell onerter sed DVR with enery iniized openstion strtey, in Pro. of 4st NPS, Ot. 9, Mississippi Stte, US, pp. 6. [].S.L, M..Won nd Y.D.Hn, Volte swell nd oerolte openstion with unidiretionl power flow ontrolled dyni olte restorer, I Trns. Power Deliery, pp. 53 5, Ot. 8. opyriht to IJIRST DOI:.568/IJIRST

14 ISSN(Online) : ISSN (Print) : nineerin nd Tehnoloy (n ISO 397: 7 ertified Orniztion) Vol. 5, Issue 3, Mrh 6 []J. Loree, L. Tn,. DeWinkel, nd P. Vinett, Desription of irosms syste for protetion of ritil ustoer filities, I Trns. Power Deliery, ol. 9, no., pp , pr []S.. Sleh,. R. Moloney nd M.. Rhn, Ipleenttion of dyni olte restorer syste sed on disrete welet trnsfors, I Trns. Power Deliery, ol. 3, no. 4, pp , Ot. 8. [3]P.R.Sánhez,.h, J.. O. lderon, V. Feliu nd. G. errd, Verstile ontrol shee for dyni olte restorer for powerqulity iproeent, I Trns. Power Deliery, ol. 4, no., pp , Jn. 9. [4].Wn nd G.Venktrnn, Dyni olte restorer utilizin trix onerter nd flywheel enery store, I Trns. Industry pplitions, ol. 45, no., pp. 3, Jn./Fe. 9. [5]M..Pérez, P.ortés nd José Rodríuez, Preditie ontrol lorith tehnique for ultileel syetri sded Hride inerters, I Trns. Industril letronis, ol. 55, no., pp , De. 8. opyriht to IJIRST DOI:.568/IJIRST