SOFT-SWITCHING ACTIVE POWER FILTER FOR REDUCING HARMONIC CURRENT IN SYSTEM WITH NON-LINIER LOAD

Transcription

1 VO. 2, NO. 8, SEPTEMBER 207 ISSN ARPN Jounal of Engneeng and Appled Scences Asan Reseach Publshng Netwok ARPN). All ghts eseved. SOFT-SWITHING ATIVE POWER FITER FOR REDUING HARMONI URRENT IN SYSTEM WITH NON-INIER OAD Jumadl JN, Wahyu Mulyo Utomo and Nuhatsyah 2 Fakult Electcal and Electonc, Unvest Tun Hussen Onn Malaylsa, Batu Pahat-Joho, Malaysa 2 Depatment of Electcal Engneeng, Batam Unvesty, Batam- Kepulauan Rau, Indonesa E-Mal: jumadl@gmal.com ABSTRAT Ths pape pesents the desgn of an actve powe flte APF) wth soft swtchng. APF used fo compensatng the powe facto hamonc and hamonc cuent, but usually swtchng losses s nceased when APF opeates at hgh fequency. The swtchng losses can be educed by soft swtchng technque. The poposed soft swtchng losses can be educed by soft swtchng technque. The poposed soft swtchng APF ncludes the combnaton of the boost convete wth aulay esonant. By usng an aulay esonant ccut, swtchng losses of APF s educed and the ccut foces voltage o cuent to zeo fo the duaton swtchng. The advantages of poposed desgn mpove effcency, educed voltage stess, and geatly educed hamonc cuent of voltage souce. The poposed soft swtchng APF ated at 500 W and opeated at 0 khz. It can acheve a snusodal lne cuent and nea unty powe facto. In ode to vefy the poposed desgn a smulaton model usng Matlab/ Smulnk was developed. The esults show that the poposed APF can sgnfcantly educe the total hamonc dstoton THD) and mpove the powe facto. Keywods: soft swtchng, actve powe flte, total hamonc dstoton, powe facto. INTRODUTION The moden technology use nonlnea load to connect the electonc devces such as; pesonal compute P), smat phone, mcowave oven, vaable speed dve, battey chage, and ndustal electonc equpment wth powe system [],[2], [3], whch cause sgnfcant ncease of lne losses, n stablty, and voltage dstoton. It s dawn non-snusodal cuent fom the supply and voltage dstoton whch led to the hamonc [4]. Recently, the hamonc become a vey mpotant feld to be eploed because the poblems of hamoncs ae seous, such as oveheatng, low powe facto, data losses, malfuncton of the gd component, wng falue, an ecessve neutal etun cuent n the neutal cuent conducto and blackout system [5] Now, thee ae some methods to educe hamonc cuent that have been used by pevous eseaches.e. passve flte and actve flte [6]. Passve flte has been used to estct the hamonc cuent flow n a dstbuton system. Howeve, the passve flte stll possesses many dsadvantages such as tunng poblem, paallel and sees esonance wth souce voltage hamoncs, dmensons and weght of the devce ae bg [6], [7], [8]. The geneally shunt APF s desgned to educe the THD whch educng hamonc cuent and mpove the powe facto closed n the unty hamonc. The compaed wth the Passve Flte, APF s beng avodable fo potental esonance, fleble contol, accuate n paametc desgn, and small n sze and effectve to pess all of the hamonc systems [9], [0]. In ode to the swtchng losses can be educed by soft swtchng technque []. Ths poposed use APF need soft swtchng s to adde esonant of boost convete. In ths pape, the compaed an APF conventonal wth APF poposed, to educng THD cuent souce and mpove powe facto. MATERIA AND METHOD In ths secton, an APF conventonal and APF wth soft swtchng wth chagng battey non- lnea load) dscussed. APF conventonal concept The actve powe flte APF) s consst of fou MOSFETs by bdge sngle phase method whee a capacto connected wth sees nducto f n the ac sde and the dc capacto dc n the dc sde as Fgue-. The opeaton flte of the flte s povdng the hamonc compensaton cuent, but APF has capable [2], [3], of compensatng fo all the hamonc poduced by nonlnea load. The man functon of the APF s the cuent hamonc educe and the eactve compensaton of the load. The actve fltes daw the compensatng cuent to cancel hamonc cuent poduced by the nonlnea load.[4], [5]. Fgue-. APF conventonally connected to the gd wth nonlnea load. 528

2 VO. 2, NO. 8, SEPTEMBER 207 ISSN ARPN Jounal of Engneeng and Appled Scences Asan Reseach Publshng Netwok ARPN). All ghts eseved. To compensate effectve, the APF desgn s an mpotant. In ode to mplement the APF the efeence sgnal. * ) Whee and ae the load cuent dstoted by the non-lnea load and fundamental component of the load cuent. The sngle APF compensatng cuent s egulated by a deadbeat cuent contolle, such that the cuent dawn by the APF fom the utlty A powe souce s equal to the hamoncs and eactve cuent equed fo the nonlnea load and PI contolle s necessay to keep the capacto on the D sde of the sngle-phase APF constant [6]. If the voltage supply, Vn fo system s an deal snusodal wavefom, the value of nstantaneous can be s: f 2) s Soft swtchng APF poposed The APF soft swtchng poposed usng an aulay esonant ccut s as Fgue-3. It consst of APF wth an addtonal aulay ccut such as thee swtch S, S, S 2 ), two esonant nducto, ), thee esonant capacto, p ) and two dodes D, D ). o Fgue-3 Poposed soft swtches APF. The opeatonal pncple of ths APF poposed can be dvded nto eght opeaton modes n detal below: The st opeaton mode t o t t ) s assumed that swtch S on and swtch S 2 off, as well as D and D 2 off. The cuent cannot flow though swtch S and S 2. The cuent whch flow though D and D 2 s d t)=0 wth V ct) =0. Theefoe, the man nducto enegy n load tansfe s shown n equaton 2 and equaton 3. V t) V V 3) s o t) V t). dt 4) Vs Vo t) t to) 5) Fgue-2. APF Poposed connected to the gd wth non-lnea load. The pncple of APF poposed as boost convete concept. Fgue-4. Opeaton soft swtchng APF. 5282

3 VO. 2, NO. 8, SEPTEMBER 207 ISSN ARPN Jounal of Engneeng and Appled Scences Asan Reseach Publshng Netwok ARPN). All ghts eseved. Dung ths esonant nducto cuent s zeo 0), chaged esonant capacto equal to the output voltage. The 2 nd mode opeaton s t t t 2). Thee ae two cuent loops whee swtch S 2 s tuned off. Theefoe, esonant nducto cuent s nceased lnealy fom zeo. The cuent esonant nducto s shown n equaton 6. V o t ) t t ) 6) The 3 th opeaton mode s t 2 t t 3). The man dode D 0 s tuned off. Resonance capacto and esonant nducto led to the cuent flowng to esonant nducto whch ae poduced by combnaton between man nducto cuent and esonant capacto cuent. Whle the esonant peod, the voltage of the esonant s equal to zeo. Theefoe, the equaton 7 and equaton 8 show the fequency and mpedance calculaton. 7) Vs t t3) mn 2) The 7 th Opeaton mode s t 6 t t 7). The dode D ) s tuned on and swtch S 2 s tuned off. These condtons led to esonant capacto voltage become zeo. Resonant nducto cuent s sepaated by man nducto cuent and aulay dode cuent. The 8 th mode opeaton s t 7 t t 8). The zeo voltage of man dodes s obseved when the esonant capacto ) s dschaged. SIMUATION RESUT A soft swtchng APF topology s chosen fo smulaton study, conssts of a sngle phase. To vefy the poposed convete pefomance, smulaton of 500 W APF, wth boost convete s lsted followed: Table-. Paamete of the poposed APF. Z 8) Whee:, Z, c and ae angula speed, esonant mpedance, esonant nducto and esonant capacto. The 4 th Opeaton mode t 3 t t 4) s ths mode when the swtch S tun on and then the voltage of a esonant capacto ) s zeo. Theefoe, man voltage ) and esonate capacto 2 equal to zeo 0). The man nducto s calculated based on equaton 9. V s t ) mn t t ) 9) 3 The 5 th Opeaton mode s t 4 t t 5). In ths mode swtch S tun on, and aulay dode D and D 2 ae not connected whch poduce zeo voltage. When the esonant nducto s and 2 have been fully chaged. The followng esonance as: Z 0) 2 Fom Fgue-5 to 6 show smulaton esult of the conventonal APF connected wth non-lnea load, the wavefom of cuent souce almost n snusodal fom t, mpove based on pecentage of total hamonc dstoton THD) and powe facto ae 27.3% and By usng the man swtch S ) and aulay swtch S ), S 2 ). And esonant nducto and esonant capacto, and swtchng fequency ae 20 KHz constant. ) 2 Whee esonant mpedance and angula fequency s Z and. The 6 th Opeaton mode s t 5 t t 6). The voltage p has eached zeo when aulay swtch tun on. The feewheelng path cuent s tuned off on the dode esonant nducto. Theefoe, the cuent esonant nducto s calculated by usng equaton 2. Fgue-5. uent souce APF conventonal. 5283

4 VO. 2, NO. 8, SEPTEMBER 207 ISSN ARPN Jounal of Engneeng and Appled Scences Asan Reseach Publshng Netwok ARPN). All ghts eseved. Table-2. The compae THD cuent and powe facto. Fgue-6. THD cuent souce APF conventonal. Once n compensaton wth APF poposed cuent souce pue snusodal wave had a moe vsble fom, as n the pctue Fgue-7 and Fgue-8 can be sgnfcantly lowe total hamonc dstoton of 8.83% and mpove powe facto ONUSIONS Ths pape has pesented the powe shunt APF fo hamonc compae cuent souce THD wth APF conventonal and APF poposed. Ths poject has been attached wth non-lnea load and sngle phase APF developed usng Matlab/Smulnk. The APF poposed hamonc dstoton can be educed and powe facto of the supply system has mpoved as well. AKNOWEDGEMENTS The authos would lke to thank the Faculty of Electcal and Electonc Engneeng, Unvest Tun Hussen Onn Malaysa UTHM) fo facltatng ths poject. REFERENES [] J. M. Jangg, W. M. Utomo, M. Abdul, T. Mat, and M. E. Mahadan, Atfcal Neual Netwok ontolle fo Sngle-Phase Actve Powe Flte, 204, pp Fgue-7. uent souce APF poposed. [2] R.. De Aaujo Rbeo,.. De Azevedo, and R. M. De Sousa, A obust adaptve contol stategy of actve powe fltes fo powe-facto coecton, hamonc compensaton, and balancng of nonlnea loads, IEEE Tans. Powe Electon., vol. 27, no. 2, pp , 202. [3] G. Panda, S. K. Dash, and N. Sahoo, ompaatve pefomance analyss of Shunt Actve powe flte and Hybd Actve Powe Flte usng FPGA-based hysteess cuent contolle, n IEEE 5 th Inda Intenatonal onfeence on Powe Electoncs IIPE), 202, pp. 6. [4] M. Izha,. M. Hadze, M. Syafudn, S. Tab, and I. Ids, Pefomance fo passve and actve powe flte n educng hamoncs n the dstbuton system, n Natonal Powe and Enegy onfeence, PEon Poceedngs, 2004, pp Fgue-8. THD cuent souce APF poposed. The compaatve esult of the system wth APF conventonal and APF poposed pefoms well as gves the lowest THD cuent souce and the best mpovement of powe facto as follows Table-2. [5] G. Adam, A. G. S. Bacu, and G. vnţ, a Matlab- Smulnk Appoach To Shunt Actve Powe Fltes, n Euopean onfeence on Modellng and Smulaton EMS, 20, vol. 6, no. d, pp [6] R. Sanjan, Assoted Hybd flte Topology fo Hamonc compensaton n font end system, no., pp. 4,

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