POWER QUALITY ENHANCEMENT IN INDUCTION MOTOR DRIVES BY USING CUSTOM POWER DEVICE

Transcription

1 T. Manokaan, V. Rajaekaan Poboljšanje kvalitete elektične enegije u pogonima indukcijkih motoa upoabom pilagođenog pogonkog ueđaja ISSN (Pint), ISSN (Online) DOI: /TV POWER QUAITY ENHANCEMENT IN INDUCTION MOTOR DRIVES BY USING CUSTOM POWER DEVICE T. Manokaan, V. Rajaekaan Oiginal cientific pape Thi pape focue on the advancement of electic powe quality tendencie of an induction moto a well a alleviating the conequence on account of the polonged duation voltage dicepancy and alo quite a hot time peiod voltage vaiance of thee kind of that ove voltage, unde voltage continuou inteuption, impemanent voltage fall togethe with voltage climb o maybe an entie diappeaance of voltage. The popoed alleviating device i a band new topology of a dynamic voltage etoe (DVR). A DVR i often familia to alleviating the impact of unuually high voltage vaiation while making ue of a highly effective cutom electic powe equipment that i to ay dynamic voltage etoe. It contain an electic powe toage device, filtation ytem, voltage ouce invete and alo injection tanfome. Thee ae numeou categoie of egulating appoache being employed fo mitigation of abnomal voltage. The popoed contol appoach to DVR will be baed upon the 'abc to dqo' conveion methodology employed. The demontation outcome can be found in eveal cicumtance of ag, well and additional hamonic diode in the upply voltage which exhibit the eimbuement abilitie of DVR. The pefomance of uggeted tategy i examined with the aid of compute demontation though the ue of MATAB/SIMUINK oftwae. Keywod: ditibution ytem; dynamic voltage etoe; powe quality; unbalanced and ditoted load; voltage ag and well; voltage ouce invete Poboljšanje kvalitete elektične enegije u pogonima indukcijkih motoa upoabom pilagođenog pogonkog ueđaja Izvoni znantveni članak Rad e bavi natojanjima za poboljšanje kvalitete elektične enegije indukcijkog motoa kao i ublažavanjem poljedica zbog dulje neujednačenoti napona i takođe katkog tajanja takvih pomjenljivoti napona, talnih pekida napona, neujednačenog pada i poata napona ili možda i potpunog netanka napona. Pedloženi ueđaj za ublažavanje ovih pojava je avim nova topologija dinamičkog obnavljača napona (dynamic voltage etoe (DVR). DVR ublažava djelovanje neuobičajeno velikih pomjena napona i koiti vioko učinkovit pilagođen elektični ueđaj, t.j. dinamički obnavljač napona. Satoji e od ueđaja za akumulianje elektične enegije, utava za filtianje, petvaača izvoa napona i ipavljača ubizgavanja. Potoje bojni egulatoi za ublažavanje abnomalnih napona. Pedloženi pitup DVR-u temeljit će e na pimijenjenoj metodologiji konvezije 'abc do dqo'. Pimjei za demontaciju mogu e naći u nekoliko lučajeva labljenja, ata i dodatnog hamonijkog needa u naponu na kojima e pokazuju mogućnoti DVR-a. Izvšenje pedložene tategije ipitano je pomoću demontacije na ačunalu upoabom oftvea MATAB/SIMUINK. Ključne iječi: dinamički obnavljač napona; kvaliteta elektične enegije; neuavnoteženo i izobličeno opteećenje; pad i poat napona; petvaač izvoa napona; utav apodjele 1 Intoduction Voltage unpedictability i mot fequent powe quality (PQ) touble in indutial ditibution ytem that influence the induction moto behaviou. The voltage ditubance pedominately contain the voltage ag, well (powe, peed, toque and poible tall) hamonic (loe and toque), unbalanced quite hot inteuption, tanient ove voltage and unde voltage and flicke [1]. Thee voltage inteuption inaupiciouly effect voltage vulneable load appliance in automatic poduction line, high peciion poceing, building, olling mill, textile mill. Thee kind of voltage and challenging expeience intefeence eulting in ubtantial cot-effective and o data loe [3.-.5]. Voltage ag ae efeed to a educing of oot mean quae voltage at powe fequency fo duation fom 0,5 cycle to 1 minute. It i actually theefoe poible fo the ag of a hot-time moment to caue poblem in ome enitive equipment [6, 7]. Voltage ag may be caued by witching action aociated with impemanent diconnection of upply, the pogeion inuh cuent aociated with the commencing of induction moto load o teady team of fault cuent due to hot cicuit fault which include ingle line to gound fault in a powe ytem (SG). Thee kind of phenomena would pobably oiginate fom the cutome ytem o fom a public upply netwok [8, 9]. Voltage well ae bief magnification in oot mean quae voltage between 1,1 pu and 1,8 pu at the powe fequency amount of time fom 0,5 cycle in 1 minute. A with ag, well will mot cetainly be aociated with ytem incoheent condition, but they ae not a pefeed a voltage ag. One way that a well peent itelf fom the tempoay voltage intenify on the healthy phae though the coue of due to the fact SG fault well can alo be a eult of wapping of a limitle demand o pehap enegizing a limitle capacito bank [10, 11]. The peliminay opeation of the DVR i to inject a voltage of the aociated magnitude, phae poitioning and additional fequency in pogeion with the ditibution feede to monito and tay in the deied amplitude and wavefom fo load voltage even though the voltage i out of balance o ditoted [ ]. Numeou extaction a well a mitigation technique have been unveiled with ditinct etaint algoithm in addition to ditinct topologie. A baic topology with effotle etaint i intoduced in [15] to eplenih voltage unbalance. Thi technique ha taken into conideation the peciou time inhibition of the manipulated poce along with the DVR outcome filtation ytem limitation. The uggeted etaint technique algoithm fo getting gid of togethe with extenuating the voltage intefeence without peciou time inhibition. The load powe facto i appaently alo ignificant paamete in chooing the uitable DPWM method to be utilized in the D- STATCOM. In geneal, it i indicate that DPWM method can be applied to D-STATCOM fo high modulation index [16, 17]. The phae bounce povide the ag depth and alo phae tanfomation infomation and Tehnički vjenik 22, 4(2015),

2 Powe quality enhancement in induction moto dive by uing cutom powe device fact with commencement and even finih cicumtance. The poweful eaction of the uggeted etaint appoach algoithm i examined though the ue of the MATAB oftwae package. Afte that the outcome ae highlighted to ugget the popective benefit fom the uggeted technique fo egulating DVR. 2 Dynamic Voltage Retoe (DVR) 2.1 Intoduction Due to the quick vaiation within the upply voltage, the pefomance of cucial load like emiconducto fabication plant, pape mill, food poce plant and automotive aembly plant will be affected. The mot fequently manifeting inteuption in the ouce voltage ae the voltage ag o pehap inflate that ae able to be a a eult of inteuption occuing in the tanmiion ytem, neighbouing feede impefection o maybe fue o pehap beake functioning. Voltage ag of pehap 10 % loweing of magnitude, utainable fo 5 10 cycle can bing about moe expenive deteioation in ignificant load. They ae able to take place a a conequence of ymmetical o maybe unymmetical impefection. Uncompenated nonlinea load in the ditibution ytem may caue hamonic element in the upply voltage. To alleviate the complication bought on by low quality of powe upply, eie connected compenato ae ecognized a Dynamic Voltage Retoe (DVR). An Active Voltage Retoe i a eie aociated olid tate appaatu that inject voltage into the ytem to be able to adjut the load ide voltage. It i typically poitioned in a ditibution ytem between the upplie in addition to the ignificant load feede. Thei mot impotant pefomance will vey quickly ecupeate the load-ide voltage in the eventuality of an intefeence to be able to tay clea of any kind of powe ditubance to that paticula load. Thee ae many diffeent cicuit topologie togethe with managing tategie which they can ue to put a DVR into pactice. The DVR ha alo the capability to handle line voltage hamonic eimbuement, elimination of tanient in voltage and alo weakne cuent boundaie. To be able to alleviate voltage ag, DVR eally hould be competent at geneating in addition to conuming active a well a eactive powe to and fom the gid. To appopiate paticula voltage ag, not meely voltage but additionally active o eactive powe upplement ae eential. The DVR can eult in making the eactive powe; nevethele the infued active powe hould oiginate an impotant pat of the DVR fom the enegy toage. Conequently minimization of active powe injection i vey impotant to enhance the lift of the enegy toage. The mot impotant apect of the DVR ae injection tanfome, hamonic filtation ytem; voltage ouce convete and alo etaint a well a pope potection ytem ae highlighted in ubequent chapte. 2.2 Injection/boote tanfome The Injection enhancement upplement electical equipment could be a pecifically ceated electical device which make an endeavou to etict the coupling of noie togethe with tanient enegy fom the initial T. Manokaan, V. Rajaekaan featue to the upplementay element. It connect the DVR to the ditibution netwok though the HVwinding in addition to tanfome and alo contented couple the injected countebalancing voltage diected by the voltage upply convete to the inbound upply voltage. Futhemoe, the Injection/Boote electical device povide the intention of uninflected the load fom the ytem. 2.3 Hamonic filte The mot impotant poce of hamonic filtation ytem will be to continue the hamonic voltage content diected by the invete within eaonable limit. Thee kind of filtation ytem ae ettled at the high voltage ide to tay away fom intoduction in phae poition tanfomation that may inteupt the etaint algoithm. 2.4 Voltage Souce Convete (VSC) A VSC i a powe electonic ytem which include a toage device togethe with wapping ytem, which can make a inuoidal voltage at almot any eential fequency, magnitude, and alo phae poition. In the DVR utilization, the VSC i ued a a tool to momentaily upgade the upply voltage o even geneate the potion of the upply voltage that i being neglected. A numbe of cicuit topologie ae offeed fo the VSC howeve the often ued technique i the two level o multilevel theephae convete which ecue a DC capacito between almot all phae. The intent behind thi capacito i pecifically to conume hamonic ipple in addition to conequently thee ae a compaatively compact enegy toage demand, paticulaly when in paticula when functioning in well-balanced cicumtance. 2.5 Switching device Thee ae actually fou main kind of witching gadget: Integated Gate Commutated Thyito (IGCT), Inulated Gate Bipola Tanito (IGBT), Gate Tun- off Thyito (GTO), and in addition to Metal Oxide Semiconducto Field Effect Tanito (MOSFET). Evey veion of gadget poee it own poitive apect a well a etiction. The IGCT i a contempoay teamlined device with upgaded pefomance effectivene and alo tutwothine which allow developing VSC with ubtantial powe ating. A a conequence of the eiou advanced convete layout with IGCT, the DVR can eaily eplenih decline that happen to be beyond the capacity of an ealie peiod DVR making ue of typical appliance. 2.6 Stoage device The objective i uually to funih the eential enegy to the VSC by mean of DC link fo the geneation of injected voltage. Batteie and even Ulta capacito ae the mot typical vaietie of enegy toage ytem. Batteie may be vey beneficial in cae a vey high voltage battey aangement i employed. Paticula ultacapacito ae able to cay the expene ove polonged amount of time, to be able to behave like a battey. Nevethele, in contat to batteie, thee kind of ulta Technical Gazette 22, 4(2015),

3 T. Manokaan, V. Rajaekaan Poboljšanje kvalitete elektične enegije u pogonima indukcijkih motoa upoabom pilagođenog pogonkog ueđaja capacito poe a quick chage peciou time togethe with conideably longe exitence. Actually, the capacity of the toed enegy etablihe intantly the exitence of the ag and thi can be mitigated by the DVR. 2.7 Contol and potection ytem The contol ytem of the common aangement odinaily i made up of Digital Signal Poceing (DSP) boad. The equipment imila to identify and alo modification ae offeed by the oftwae on the DSP boad. Filtation ytem ae typically employed fo thee kind of equiement. The mot fequent vaietie of the filtation ytem algoithm ae the Fouie Tanfom (FT) a well a the Wavelet Tanfom. 3 DVR pinciple of opeation The DVR i cutom made electic powe equipment which may be aociated in eie with the ditibution ytem a hown in Fig. 1. The DVR i enfoced committed voltage ouce convete that inject a dynamically manipulated voltage in eie to the bu voltage though a boote tanfome. The tempoay amplitude of thee injected phae voltage bought on by tanient ditaction in the ac feede will pobably be ewaded by mean of the exactly ame voltage poduced though the convete in addition to be injected on the platfom voltage level by way of the boote tanfome. Figue1 DVR Opeation aangement, a a conequence of unbounded impedance the abolutely zeo equence pat of intefeence i not likely to pemeate the tep down tanfome. Fig. 2 exhibit the compaable cicuit of the DVR, wheneve the ouce voltage goe up o maybe goe down; the DVR inject a eie voltage V inj by mean of the injection/boote tanfome to enue the pefeed load voltage magnitude V i geneally peeved. The eie injected voltage of the DVR may be witten a V = V + V, (1) inj in which V i the pefeed load voltage magnitude, V i the ouce voltage in the coue of ag/well ituation. The load cuent I i witten by, I P ± J Q =. (2) V 4 Pinciple of vecto contol The fundamental of vecto contol implementation can be explained with the help of Fig. 3 in which the machine model i epeented in a ynchonouly otating efeence fame. The invete i not ight now thee fom the figue, given that thee i unity cuent gain that i definitely, it make cuent. i a, i b and i c a dictated by the coeponding command cuent i a *, i b * and i c * fom the contolle. A machine deign with inteio conveion ate i demontated on the ight ide of Fig. 3. The machine teminal phae cuent i a, i b and i c ae conveted to ii d and ii q component by 3φ/2φ tanfomation. Thee ae geneally then modified to ynchonouly evolving tuctue by unit vecto element co.θ e a well a in.θ e befoe employ thoe to the d e -q e machine deign while peented. The contolle can make a couple of phae of invee modification, a hown, o a to enue that egulate cuent i d * and alo i q * coepond to the machine cuent i d a well a i q epectively. Additionally, the unit vecto enue appopiate poitioning of i d with the flux vecto ψ and i q pependicula to it, a hown. The modification togethe with invee tanfomation along with the invete pefeably will not combine any kind of baic chaacteitic, a well a, the conequence of i d and i q i intantaneou. Figue 2 Equivalent cicuit of DVR The DVR pefom individually of the ot of poblem o pehap almot any affai that take place in the ytem, given that the complete ytem i till linked with the upply gid, i.e. the line beake will neve tip. Fo the majoity of intance, a much moe affodable deign can be accomplihed by excluively countebalancing the poitive and negative equence component and pat of the voltage intefeence noticed at the input of the DVR. Fo an odinay ditibution bu Figue 3 Vecto contol implementation pinciple with machine d e-q e model Tehnički vjenik 22, 4(2015),

4 Powe quality enhancement in induction moto dive by uing cutom powe device Thee ae eentially two geneal method of vecto contol. One i called diect o feedback method and the othe one i indiect o feed fowad method. Thee method hould be mentioned the oientation of i d with oto flux ΨΨ, ai gap flux ΨΨ m, o tato flux ΨΨ i poible in vecto management. On the othe hand, oto flux alignment povide natual decoupling contol, although ai gap o pehap tato flux poitioning can povide a coupling outcome that need to be ewaded by a decoupling compenation cuent. T. Manokaan, V. Rajaekaan Fig. 4 how the tato flux oiented vecto contol, q =0, d =ΨΨ theefoe, (1 + SSTT )ΨΨ d = (1 + σσσσtt ) ii d σσ TT ωω l ii q (11) (1 + σσσσtt ) ii q = ωω l TT ΨΨ d σσ ii q (12) 5 Stato flux oiented vecto contol The tato flux oiented diect vecto contol ha the advantage that flux vecto etimation accuacy i affected by tato eitance R vaiation only. In thi ection a tategy i developed fo tato flux oiented diect vecto contol by manipulating equation deived fom d e -q e equivalent cicuit. (1 + SSTT )ΨΨ d ii d TT ωω l ΨΨ q = 0 (3) (1 + SSTT )ΨΨ q ii d TT ωω l ΨΨ d = 0 (4) In (3) and (4) ΨΨ d,ψψ q ae to be eliminated and eplaced by ΨΨ q and ΨΨ d, ii d = ΨΨ d ii d (5) ii q = ΨΨ q ii q (6) Figue 5 Feed fowad decoupling ignal injection in tato flux oiented vecto contol Fig. 5 how feed fowad decoupling ignal injection in tato flux oiented vecto contol. The decoupling indication i dq becoming ineted the flux etain loop to make i d * mainly becaue a contol ignal. ii d = GG(ΨΨ d ΨΨ d ) + ii dq (13) whee G = K 1 + K 2 /S, (1 + SSTT )ΨΨ d = (1 + σσσσtt ). GG(ΨΨ d ΨΨ d ) + (1 + σσσσtt )ii dq σσtt ωω l ii q (14) Fo decoupling contol of ΨΨ d with help of i dq, tem, (1 + σσσσtt )ii dq σσtt ωω l ii q = 0, ΨΨ d = ΨΨ d + ii d (7) ii dq = σσtt ωω l ii q (1 + σσσσtt ) (15) ΨΨ q = ΨΨ q + ii q (8) The elation between tato, oto fluxe and tato cuent i obtained by (7) and (8), ubtituting (7) and (8) in (3) and (4) epectively and multiplying both ide by m /. (1 + SSTT )ΨΨ d = (1 + σσσσtt ) ii d ωω l TT ΨΨ q σσ ii q (9) Fig. 6 how the block diagam of tato flux oiented vecto contol. The tato eitance R i a function of tato winding tempeatue only, it can be eaily compenated. The i dq accuacy can be affected by paamete vaiation, but being within a feedback contol loop, thi effect can be neglected. The lip ignal ω l can be etimated and then ubtacted fom the fequency ω e etimation to etimate the peed ignal. (1 + SSTT )ΨΨ q = (1 + σσσσtt ) ii q ωω l TT ΨΨ d σσ ii q (10) Figue 6 Stato flux oiented vecto contol 5.1 Voltage vecto equation in machine vaiable Figue 4 Phao diagam with tato flux oiented vecto contol The winding aangement fo a two pole, thee phae ta connected, and ymmetical induction machine i 1046 Technical Gazette 22, 4(2015),

5 T. Manokaan, V. Rajaekaan Poboljšanje kvalitete elektične enegije u pogonima indukcijkih motoa upoabom pilagođenog pogonkog ueđaja hown in Fig. 7. The tato winding ae exactly the ame, inuoidal dipeed winding, downgaded by 120 degee with N imila tun a well a eitance. The oto winding will alo be conideed a thee identical inuoidal ditibuted winding, diplaced by 120 degee with N equivalent tun and eitance. The tato magnetic axe coincide with the diection of f a, f b, f c a pecified by the (18) tanfomation. The voltage equation in machine vaiable may be expeed a, VV abc = ii abc + pp (16) VV abc = ii abc + ppλλ abc (17) (ff abc ) T = [ff a ff b ff c ] (18) (ff abc ) T = [ff a ff b ff c ] (19) In the above (16) (19) ubcipt denote vaiable and paamete elated to the tato cicuit, and alo the denote vaiable and paamete elated with the oto cicuit. Both and ae diagonal matice each with non-zeo element. The flux linkage may be expeed a, λλ abc = λλ abc ( ) T ii abc (20) ii abc The winding inductance ae expeed a, mateial whoe all ba ae teminated in a common ing at each end of oto. Thi type of oto configuation i efeed to a a quiel-cage oto. It may at fit appea that the mutual inductance between a unifomly ditibuted oto winding and inuoidal ditibuted tato winding. In mot cae unifomly ditibuted winding i adequately decibed by it fundamental inuoidal component and i epeented by an equivalent thee phae winding. Geneally, thi epeentation conit of one equivalent pe phae; howeve, the oto contuction if machine ae uch that it pefomance i moe accuately decibed by epeenting each phae with two equivalent winding connected in paallel. Voltage vecto equation of the machine can be expeed in machine vaiable fom; it i convenient to efe all oto vaiable to the tato winding by appopiate tun atio. ii abc = NN ii NN abc (26) vv abc = NN vv NN abc (27) λ abc = NN λ NN abc (28) The magnetizing and mutual inductance ae aociated with the ame magnetic flux path; theefoe m, m, ae elated a et foth by (23) (25). In paticula, = l l m l + (21) = NN NN (29) = NN NN (30) = l l m l + (22) In (21) and (22) l, m ae epectively leakage and magnetizing inductance of tato winding; l and m ae fo the oto winding. = NN 2 2 πμμ 0 gg = NN 2 2 πμμ 0 gg = NN 2 NN 2 πμμ 0 gg (23) (24) (25) A majoity of induction machine ae not equipped with coil-wound oto winding; intead, the cuent flow in coppe o aluminium ba which ae unifomly ditibuted and which ae embedded in a feomagnetic co θθ co θθ + 2π 3 co θθ 2π 3 co θθ 2π 3 co θθ co θθ + 2π 3 co θθ + 2π 3 co θθ 2π 3 co θθ Alo fom (23) (25) m may be expeed a, (31) = NN 2 NN m (32) = NN NN l = l 2 (33) l m l + (34) l = NN 2 NN l (35) Tehnički vjenik 22, 4(2015),

6 Powe quality enhancement in induction moto dive by uing cutom powe device T. Manokaan, V. Rajaekaan The flux linkage may be expeed a, λλ abc λλ = abc ( ) T ii abc (36) ii abc The voltage vecto equation expeed in tem of machine vaiable efe to the tato winding and may be expeed a VV abc = + pp VV abc pp( ) T pp + pp ii abc (37) ii abc Figue 8 Sag and well occu in ytem voltage Figue 9 Hamonic geneated in ytem Figue 7 Two pole, 3 phae, ta connected ymmetical induction machine 6 Reult and dicuion The pefomance of the popoed DVR technique and capabilitie wa invetigated with epect to voltage SAG, voltage SWE, unymmetical fault in the point of common coupling, evice main and total hamonic ditotion of the ytem, when the DVR expeience both balanced and unbalanced voltage in ditibution line with phae angle jump. The eult ae obtained fom the ytem unde tudying MATAB/SIMUINK. 6.1 Voltage ag and well mitigation Voltage ag ae uually aociated with ytem fault but can alo be caued by enegiation of heavy load o tating of lage powe ating of moto. Fig. 8 illutate the effect of a heavy load o lage powe ating of moto tating with ag and well. An induction moto daw 6 to 10 time of it full load cuent duing tatup. Thi will caue a udden voltage dop but hallow and balanced dop in all thee phae voltage. The voltage will then ecove lowly a the moto pick up peed. Fig. 8 how ytem voltage 'SAG' and 'SWE' a 50 % voltage initated at 150 m and it i kept until 200 m, with total voltage ag duation of 50 m, and thee phae upply voltage magnitude wee inceaed about 125 % of nomal voltage. Thi opeation i caied out in between 300 m to 400 m. Fig. 8 how the voltage injected by the DVR and the compenated voltage ag and well epectively. A the eult of DVR the load voltage i kept at 1pu thoughout the imulation including the voltage ag and well peiod. Obeve that duing uual opeation, the DVR i doing nothing. Figue 10 THD in ytem voltage Figue 11THD in DVR output voltage Figue 12 Powe facto impovement It quickly inject neceay voltage compenate to mooth the load voltage upon detecting voltage ag and well. Thu thoughout thi opeation of ag and well popoed DVR will be eady to compenate both opeation effectively with dynamic contol tategy. A hown in Fig. 9 the hamonic geneation in ytem voltage i initiated at 200 m and kept untill 300 m with total hamonic geneation of 100 m. The hamonic voltage wa injected by the DVR and detained the geneated hamonic by filte in DVR. Fig Technical Gazette 22, 4(2015),

7 T. Manokaan, V. Rajaekaan Poboljšanje kvalitete elektične enegije u pogonima indukcijkih motoa upoabom pilagođenog pogonkog ueđaja 10 how the total hamonic ditotion (THD) value of ytem voltage a ,97 %. Fig. 11 how the THD value of DVR output voltage a 1,19 % o that the filte in DVR ectify the THD value of ytem voltage fom ,97 % to 1,19 %. Fig. 12 how the powe facto impovement, the upply powe facto i 0,3681. The DVR impove the upply powe facto fom 0,3681 to 0,973 aco the load ide. 7 Concluion and futue pepective The main pupoe of uing DVR in indutie i to maximize efficiency in poduction. Thi poject ha popoed an impoved pogeive phae changing cheme of pot-fault voltage. Fo any fault ituation of voltage ag thi method i effective, which i poved fom the analyi and MATAB imulation eult. The ag tanient can be eaily mitigated and pe-fault voltage can be etablihed. Fo eal time application, thi may neceitate the application of the micocontolle/ poceo with fat peed. The analyi in thi pape i done fo voltage ag affect ingle phae and thee phae upply. Similaly imulation can be caied fo voltage ag, voltage well, hamonic and thee-phae fault. In thi pape thee-phae fault imulation have not been hown becaue that i out of cope a fa a thi poject i concened. Heeby, the effectivene of popoed method i teted and i poven eo fee. Thi popoed method i teted theoetically only howeve, exact pactical teting i left. The effect of hamonic in induction moto and voltage dop due to connection of DVR ae to be teted in actual expeimental etup. ab teting of DVR can be implemented a a pat of futue eeach wok. 8 Refeence [1] Elnady, A.; Salama, M. M. A. Mitigation of voltage ditubance uing adaptive pecepton-baed contol algoithm. // IEEE Tan. Powe Del. 20, 1(2005), pp DOI: /TPWRD [2] Yalcinkaya, G.; Bollen, M. H. J.; Coley, P. A. Chaacteization of voltage ag in indutial ditibution ytem. // IEEE Tan. Ind. Aplicat. 34(1988), pp DOI: / [3] Vilathgamuwa, D. M.; Peea, A. A. D. R.; Choi, S. S. Voltage ag compenation with enegy optimized dynamic voltage etoe. // IEEE Tan. Powe Del. 18, 3(2003), pp DOI: /TPWRD [4] Vilathgamuwa, D. M.; Peea, A. A. D. R.; Choi, S. S.; Teng, K. J. Contol of enegy optimized dynamic voltage etoe. Poc. IEEEIECON'99. 2(1999), pp DOI: /iecon [5] am, S.; Wong, M. C.; Han, Y. D. Voltage well and ovevoltage compenation with unidiectional powe flow contolled dynamic voltage etoe. // IEEE Tan. Powe Del. 23, 4(2008), pp DOI: /TPWRD [6] Bollen, M. H. J. Undetanding Powe Quality Poblem: Voltage Sag and Inteuption, New Yok, IEEE Pe, DOI: / [7] Zhan, C.; Aulampalam, A.; Jenkin, N. Fou-wie dynamic voltage etoe baed on a thee-dimenional voltage pace vecto PWM algoithm. // IEEE Tan. Powe Electon. 18, 4(2003), pp DOI: /TPE [8] Wang, B.; Venkataamanan, G.; Illindala, M. Opeation and contol of a dynamic voltage etoe uing tanfome coupled H-bidge convete. // IEEE Tan. Powe Electon. 21, 4(2006), pp DOI: /TPE [9] Sánchez, P. R.; Acha, E.; Caldeon, J. E. O.; Feliu, V.; Ceada, A. G. A veatile contol cheme fo a dynamic voltage etoe fo powe-quality impovement. // IEEE Tan. Powe Del. 24, 1(2009), pp DOI: /TPWRD [10] Boonchiam, P.; Mithulananthan, N. Dynamic contol tategy in medium voltage DVR fo mitigating voltage ag/well. // Poc. PST, 2006, pp DOI: /icpt [11] Saithaan, S.; Miha, M. K. Deign of paive filte component fo witching band contolled DVR. // Poc. TENCON, 2006, pp [12] i, Y. W.; Vilathgamuwa, D. M.; Blaabjeg, F.; oh, P. C. Invetigation and impovement of tanient epone of DVR at medium voltage level. // IEEE Tan. Ind. Appl. 43, 5(2007), pp DOI: /TIA [13] Fitze, C.; Bane, M.; Geen, P. Voltage ag detection technique fo a dynamic voltage etoe. // IEEE Tan. Ind. Appl. 40, 1(2004), pp DOI: /TIA [14] Al-Hadidi, H. K.; Gole, A. M.; Jacobon, D. A. A novel configuation fo a cacade invete-baed dynamic voltage etoe with educed enegy toage equiement. // IEEE Tan. Powe Del. 23, 2(2008), pp DOI: /TPWRD [15] Coampo, A.; Joo, G.; Zioga, P.; inday, J. Analyi and deign of a eie voltage unbalance compenato baed on thee-phae VSI opeating with unbalance witching function. // IEEE Tan. Powe Electon. 9(1994), pp DOI: / [16] Etay, M. M.; Zengin, A. Analyi of the dicontinuou PWM contolled D-STATCOM fo eactive powe compenation application. // Tehnički vjenik-technical Gazette. 21, 4(2014), pp [17] Zhenghang Hao; Zhiqing Yao; Shaohua i; Ailing Zhang; Zhuo Chen; Jianyun Chai. The contibution of double-fed wind fam to tanient voltage and damping of powe gid. // Tehnički vjenik-technical Gazette. 22, 1(2015), pp DOI: /TV Autho addee T. Manokaan, M. E. Depatment of Electical and Electonic Engineeing, Si Subamanya College of Engineeing and Technology, Palani, Tamilnadu, India tmanoka@yahoo.co.in V. Rajaekaan Depatment of Electical and Electonic Engineeing, PSNA College of Engineeing and Technology, Dindigul, Tamilnadu India ajaekaanvm@gmail.com Tehnički vjenik 22, 4(2015),