Int ern at i onal  Journ al of  P ower E le ctr on i cs a n d  Drive  S ystem s   ( IJ PEDS )   Vo l.   12 ,  No.   2 ,  Jun  2021 ,  pp.  8 11 ~ 821   IS S N:  20 88 - 8694 ,  DOI: 10 .11 591/ ij peds . v12.i 2 . pp 8 11 - 821       811       Journ al  h om e page :  http: // ij pe ds .i aescore.c om   A   re gene rative   braking   energy   recupe ration   f rom   elev ator   operatio n   in   bu il ding   by   active   rectifi er       An   Thi   H oa i   Thu   A nh ,   Lu ong   Huynh   D u c   Depa rt m ent   of   E le c tri c al   Engi n eering,   Univ ersit y   of   Tra nsport and   Comm unicati on s,   Hanoi ,   Vi et na m       Art ic le   In f o     ABSTR A CT     Art ic le   hist or y:   Re cei ved   Dec  2 ,   20 20   Re vised   Feb   2 8 ,   20 21   Accepte d   M ar   22 ,   20 21       El ev at ors -   me an s   of   ver tical   tr an sportat ion   to   c ar ry   people   and   g oods   are   an   indi spensabl e   p art   in   off ices,   high - rise   bui ldings ,   hospita ls,   com m erc i al   are as,   hotels,   car - par ks   when   bl oomi ng   urba n izati on   d evelops   worldwide .   How eve r,   the   le ve l   of   ene rg y   consump ti on   in   el ev at or   o per ation   is   signifi c ant ,   so   e ner gy   saving   soluti ons   h ave   b e en   out li ned   and   applied   in   pra ctice.   With   fre quent   bra k in g   phase s,   reg e ner ative   br aki n g   ene rgy   is   waste d   on   b rak ing   r esistors.   T her efo re ,   th is   p ape r   proposes   r ege ner at iv e   bra king   ene rgy   rec uper at ion   m e thod   for   eleva to r   oper at ion   in   b uil ding   by   ac t ive   re ct if ie rs   ena bl ing   the   bra king   ene rgy   to   be   f ed   bac k   in to   uti lity   gr id.   Simul ation   r esul ts   condu ct ed   by   MA TL AB   with   dat a   co ll e cted   fr om   OCT5B   buil ding - RESC O   new   urb an   are a ,   Hanoi ,   Vi et na m   h ave   ver ifi ed   saving   ene rgy   of   using   ac t ive   r ectif i ers   r epl a ci ng   d iode   r ec t ifi ers   up   to   33 %.   Ke yw or d s :   Acti ve   recti fier   Energ y   sa ving   M ec han ic al   el e vato r   Re gen e rati ve   braki ng   Vo lt age   ori ent ed   c on t ro l   This   is   an   open   acc ess   arti cl e   un der   the   CC   BY - SA   l ic ense .     Corres pond in g   Aut h or :   An   T hi   H oai   T hu   Anh   Dep a rtme nt   of   Ele ct rical   Eng i neer i ng   Un i ver sit y   of   Transp or t   a nd   Comm unic at ion s   No.   3   Ca u   Giay,   Lan g   T huon g   C om m une,   D ong   Da   Distric t,   Ha no i,   Viet na m   Emai l:   htan h.k td@ utc.edu. vn       1.   INTROD U CTION     Ele vators   a re   very   imp ort ant   with   high - risi ng   bu il dings   [1 ] - [ 3] ,   howe ve r,   these   el ect ri cal   tran sport   sy ste ms   ca n   ac count   f or   a   c on sidera ble   pro portio n   of   e nerg y   co nsum ptio n   in   buil dings   w hile   the   re gen e rati ve   br a king   e nergy   ob ta ine d   by   operati on   m ode s   of   el e vators   at   the   ti me   of   li fting - up   with   li gh t   load   a nd   li fting -   dow n   with   hea vy   l oad   is   bur ne d   on   the   braki ng   resist ors,   ca us in g   wa sta ge   and   ai r   poll utio n   [ 1] - [ 2].   T herefo re,   impro ving   the   energ y   e ff ic ie nc y   of   el evat or   op e rati on   has   at tract ed   m or e   at te ntion   f rom   ma nufactu re rs   a nd   researc hers,   m os t   of   w hom   hav e   pr opos e d   va rio us   e nergy   sa ving   s ol utions   a pp li ed   in   pr act ic e   [4 ] - [ 9] .   Pr iya nka   Pr iy ank a   Kuba de,   an d   S.   K.   Um at he   [ 10 ];   A.   R uf e r,   a nd   P hili pp e   Ba rr a de   [ 11 ]   recovere d   reg e ner at i ve   br akin g   e nergy   by   s up e rca pacit or s   ene rgy   st orage   dev ic e   a nd   reu ti li zed   it   w hen   the   more   e nerg y   is   require d   by   ano t her   el e vator   mo t or ;   M.   S hr eel a ks hmi ,   a nd   Vive k   Ag a r wal   [ 12 ]   co mbi ned   fu el   cel l   f or   t he   ride - t hro ugh   operati on   with   s up e rca pacit or   bank   f or   stori ng   the   re ge ner at ive   bra king   e ne rgy;   S hili   Lin,   We nji   Song,   Yon gzhen   C hen ,   et .   al .   [ 13 ]   us e d   the   batte ry   en er gy   stora ge   s ys te m   to   s up pr ess   the   volt age   fluct uation   of   the   DC   gri d   of   el e vato r,   m akin g   it   ca pa ble   of   rep la ci ng   the   re sist or   in   the   br a king   s yst em   of   t he   el e vato r;   Supapra dit   M a rson g   a nd   B oonya ng   Pla ngklan g ,   et .  al.   [ 14 ],   Bo onya ng   Plan gkla ng,   Sit ti chai   Kan t awon g,   Sirichai   Dange am ,   et .   al.   [ 15 ]   desi gn e d   an   e nerg y - reg e ner a ti ve   unit   inte grat ed   with   perm anen t   ma gn et   mo to r   el evator   s ys te ms   w hich   can   be   save   up   to   43%;   Konstant ino s   Kaf al is   a nd   Atha nasi os   D.   Ka rlis   [ 16 ]   sh owe d   su pe rca pacit or   or   fly wh eel   e nerg y   sto rag e   sy ste ms   (S CE SS,   F ESS )   dri ven   by   a   per m anen t   mag net   mo to r   in   wh ic h   F ESS   a re   mai nly   us e d   f or   po wer   ap plica ti on s   fro m   l   kW   up   to   1   MW,   w hile   su pe rca pacit ors   f or   l - 100kW   an d   20 0Wh - 50 0Wh   r especti vely   an d   FE SS   sa ve   r egen e rati ve   brakin g   e nerg y   more   ef fecti ve ly   tha n   SCESS   a bout   6%.   Furthe rm or e ,   opti miza ti on   te ch niques   su c h   as :   li nea r   pro gr a mmin g,   mixe d - i nteger   li nea r   Evaluation Warning : The document was created with Spire.PDF for Python.
            IS S N :   2088 - 8 694   In t J   P ow  Ele c  &  D ri   S ys t,   V ol .  12 , N o.   2 ,  J une  2021   :   811   –   821   812   pro gr am min g,   qua dr at ic   pro gr a mmin g,   m od el   pre dicti ve   co ntr ol,   dy na mic   pr ogram ming   a re   a ppli ed   to   minimi ze   ene r gy   c ons umpti on   in   el ev at or   operati on.   A.   Me seman olis,   C.   M a demlis,   a nd   I.   Ki os ke ridi s   [ 17 ] ,   Nikola os   Ja bbour   an d   Ch ristos   M a demlis   [ 18 ],   [ 19]   use d   an   e ne rgy   ma na geme nt   s ys te m   base d   on   an   adap ti ve   neur o - fu zz y   con t ro l   te ch ni qu e   a pp li e d   to   an   el e vato r   m otor   dr i ve   to   adjust   the   e le vator   acce le rati on /de cel erati on   rate   and   s pee d   so   as   to   maximize   the   re gen e rati ve   capab il it y   of   the   mo t or   dr i ve   and   therefo re   to   i nc rease   the   e ff i ci ency   of   the   whole   el evat or   sy ste m :   E ndika   Bi lbao ,   P hi li pp e   Ba r rade,   Ion   Etxebe rr ia - Ota du i ,   et .  al.   [ 20 ]   a ppli ed   op t imal   energy   mana geme nt   s trat egy   of   an   el evator   with   energ y   stora ge   ca pacit y   ba sed   on   dy namic   progra mmin g   ( DP)   to   re duce   gri d   powe r   pea ks   by   65% ,   an d   brakin g   resist or   ene r gy   losses   ha ve   be en   reduce d   by   84 % .   T his   pa per   pro poses   ano t her   re gen e rati ve   br a king   energ y   recuperati on   s olu ti on - t he   act ive   recti fier   wi th   bi directi ona l   energy   flo w   rep la ci ng   diod e   recti fier   so   t hat   the   reg e ner at i ve   br akin g   ene r gy   will   be   bac ke d   to   the   gri d.   T he   sim ulati on   r esults   on   M AT LAB   of   bu il di ng s   in   Hanoi,   Viet na m   in dicat e   that   ene rgy   sa ving s   is   up   to   33%.       2.     ENER GY   S A VING   F OR   AN   EL EV ATO R     The   el evat or   s ys te m   as   Fi gur e   1   co mprise s   of   mai nly   par t s:   act ive   recti fier   is   able   to   tur n   ene r gy   back   gri d   in   or der   to   rec over   reg e ner at i ve   br akin g   e nergy   a nd   t he   vo lt age   or ie nted   c on t r ol   ( VO C )   is   us ed   to   con t ro l   the   recti fier   meth od   si mil ar   to   the   fie ld - or ie nte d   co nt ro l   meth od   (FOC)   of   el evat or   dri ve n   mo t or   [21 ] - [ 25] .   In   t his   se ct ion   fo c us in g   on   m od el li ng   a nd   co ntr olli ng   the   act ive   recti fier - a   cr ucial   de vice   in   t he   el e vato r   op e rati on   e nergy   sa ving .         IM 1 S V M La i Lb i * dc u s u s u 1 v 4 v 2 v E l e v a t or  1 G e a r 1 V 3 V 5 V 4 V 6 V 2 V 3 v 5 v 6 v PL L C urr ent   m e a s ure m e nt   &  l i ne   –   v ol t a g e  e s t i m a t i o n  PI PI PI a bc   dq dq  − − − dc u sq u sd u Ld i Lq i * Lq i0 = * Ld i q i d i A = IM 2 E l e v a t or  2 = V olt age  s ou r c e   in ve r t e r r e c i i nv i c i A c t i ve  r e c t i f i e r     Figure   1.   Co ntr ol   sc heme   of   el evato r   s ys te m       Fr om   Fig ur e   1   and   Fi gure   2   (a ),   the   three   vo l ta ge   e qu at i on s   for   balance d   th ree - ph a se   s ys te m   withou t   the   ne utral   c on necti on   ( Fig ur e   2   (a))   ca n   be   wr it te n   as .     L a L a L a s a L b L b L b s b L c L c L c s c U i i U d U R i L i U dt U i i U     (1)     and   one   f or   c ur ren ts.     Evaluation Warning : The document was created with Spire.PDF for Python.
In t J  P ow Elec   & Dri S ys t   IS S N: 20 88 - 8 694       A reg e ner ative  b r akin g  e ner gy   recu per ation  from   el evator   …   ( A n  T hi  Hoa i Th u  A nh )   813   dc a L a b L b c L c i n v du C S i S i S i i dt   ( 1 )     Wh e re   Sa ,   Sb,   Sc - the   switc hi ng   f unct ion   of   the   act ive   recti fier   Using   t he   Cl ar ke   a nd   Par k   tr a ns f ormat io ns   to   c onve rt   the   s ys te m   of   (1)  from   the   co ordin at es   ( ab c )   to   the   co ordi nates   ( dq)   [22].     Ld L d L d L L q s d Lq L q L q L L d s q di u Ri L L i u dt di u Ri L L i u dt   ( 2 )     () c L d d L q q i n v du c i S i S i dt   ( 3 )     Give n       c o s s i n s i n c o s d L L q L L S S t S t S S t S t     ( 4 )     1 ( 2 ) 6 1 ( )                   2 a b c bc S S S S S S S     ( 5 )       L R L U S U L i   L U S U L I L RI L j L I   (a)       (b)       L I L U L j L I L RI S U 0    L U 0  L I S U L RI L j L I   (c)     (d)       Figure   2.   P has or   dia gr am s,   (a )   sin gle - phase   diag ram   of   rect ifie r   ci rc uit,   ( b)   ge ner al   phaso r   diag ram ,     (c)   Re ct ific at io n   at   un it y   po w er   fact or,   (d)   R egen e rati on   at   un it y   po wer   fa ct or       Ther e f or e,   the   mathemat ic al   model   str uctu r e   of   the   act ive   recti fier   in   the   dq   co ordi nates   is   show n   in   Fi gure   3       Evaluation Warning : The document was created with Spire.PDF for Python.
            IS S N :   2088 - 8 694   In t J   P ow  Ele c  &  D ri   S ys t,   V ol .  12 , N o.   2 ,  J une  2021   :   811   –   821   814   u Ld S d u Lq S q + _ + + _ + U sd U sq 1 R pL + 1 R pL + L L − 1 sC U dc i dc _ + + I Ld I Lq     Figure   3.   Acti ve   recti fier   mod el   in   dq   c oor di nates       2.2.   Design   of   c ont rol   lo op s   In   orde r   to   ac hieve   great   ad van ta ges   of   the   act ive   recti fi er.   In   this   sect ion ,   de sig ning   three   c ontr ol   loops   phase   lo cked   lo op,   c urr ent   lo op   an d   volt age   loop   is   pe rformed .       2.2.1.   Pha se   locke d   l oop   ( PLL )     The   PL L   pe rfo rms   the   deter m inati on   of   t he   ph a se   an gle   be tween   the   gri d   vo lt age   vecto r   and   t he   α -   axis   of   t he   c oord i nate   syst em   αβ ,   w hich   is   al so   the   an gle   betwee n   the   d - axis   of   t he   ro t at ion   c oor din at es   dq   with   α - a xis   of   fixe d   co ordin at es   αβ ,   f or   c onve rting   c urr ent   an d   volt ag e   vecto r   co ordinates   as   s ho wn   in     Figure   4.   Fig ure  5   s hows   v olt age  vect or s   on  the  a xes   αβ   a nd  dq   a nd   Fig ure  6   s hows   c on t ro l   str ucture  of  PLL   ph a se - loc k  l oop .       U U  dq * q U 0 qre f U = PI * re f dt −     Figure   4.   PLL   scheme       with   Uq   is   cal c ulate d   acc ordin g   to   the   t ran s f ormat io n   f orm ula .     ) . s i n ( * ) . s i n ( U q U U   ( 6 )     ∆ θ   is   small ,    = .      wh e re :     U q   :   s ource   volt age   on   q - exis   of   dq   c oor din at es   *   is   the   PLL   bloc k   ou t pu t   le a ni ng   an gle       is   the   s ource   volt age   ph a se   a ng le     Evaluation Warning : The document was created with Spire.PDF for Python.
In t J  P ow Elec   & Dri S ys t   IS S N: 20 88 - 8 694       A reg e ner ative  b r akin g  e ner gy   recu per ation  from   el evator   …   ( A n  T hi  Hoa i Th u  A nh )   815   U q d U U − d U q U − w w s *     Figure   5.   V oltage   vecto rs   on   the   a xes   αβ   a nd   dq       − 1 s * U 1 1 s sT + 1 i p i sT K sT +     Figure   6.   Co ntr ol   str uctu re   of   PLL   ph a se - loc k   loop       The   cl os ed - loop   ph a se   tra ns fe r   f unct ion .       2 1 2 11 2 2 2 11 1 2 1. ( ) . . 2 . . . () 1 ( ) 1 . . . 2 . . . 1 i hi nn k hi i n n k Gs Ts k F s k T s k s s Fs F s T s s k T s k s s k s   ( 7 )   Using   t he   s ymmet ric   opti miza ti on   met hod   with   the   sta nda rd   f un ct io n   G k ( s) [ 25] ,   the n   see king    ,  .       2 2 2 1 1 1 2 . .              2. 2 . . . 2 . . 2. p ni n p n i n in i i n n n kU T k k k T U kT T T     Wh e re   -   Oscil la ti on   c ycle,   - D amping   rati o   (s el ect   = 0 . 7 ).     2.2.2.   Design   curre n t   c on tr ol   lo op   Inner   loop   ci rc uit - cu rr e nt   l oop:   T he   ta sk   is   to   br i ng   re act ive   powe r   Q   ≈   0   a nd   c oe ff ic ie nt   c os φ   ≈   1.   Der i ving   from   (3):   Ign or i ng   t he   co upli ng   c omp on e nt   ωL ,   t ran s fer   functi on   relat ing    with      is   com pute d   strai gh t   f orwardly   ( Fi gure  7 ) .     1 . Ld L d s d I U U R L s   (9)       Evaluation Warning : The document was created with Spire.PDF for Python.
            IS S N :   2088 - 8 694   In t J   P ow  Ele c  &  D ri   S ys t,   V ol .  12 , N o.   2 ,  J une  2021   :   811   –   821   816   1 R sL + i R p i 1 K ( 1 ) Ts + − Ld i * Ld i s 1 1 sT + Ld U     Figure   7.   Co ntr ol   str uctu re   of   i Ld   cur re nt   c on t r oller       The   cl os ed - loop   tra nsfer   f un ct ion   of   the   in ner   loop Ld i tur ns   out   to   be .     2 ( 1 ) ( s ) 1 . ( 1 ) i k ai k T s G T s T s k T s   ( 8 )     To   cal c ulate   co ntr oller   pa rame te rs,   the   m odul e   opti mal   meth od   is   us ed   [2 6 ] .     1 2             1 2 2         2 i i i i p s a s p L L T T L TT R R R T L k T T k T T kR       Simi la rly,   s yn thesisi ng   i Lq   con t ro l   loop   as   i Ld   con tr ol   loop.   The n,   c onside rin g   the   com pone nts   ωL   to   com pensat e   the   co up li ng   of   i nn e r   c ontrol   l oops   as   Fig ur e   8.       * Ld i P I w L w L P I − − − − − Ld i Lq i * Lq i0 = Ld u d u Lq u sd u sq u     Figure   8.   Dec ouple d   c urren t   c on t ro ll er   bl ock   diag ram         2.2.3.   Design   volt ag e   contr ol   lo op     Desi gn i ng   vol ta ge   co ntr ol   lo op   is   to   bala nc e   ene rgy   from   gr i d   un it y   to   l oa d   by   kee pi ng   the   volt age   on   the   U dclink   uncha nged   at   the   fixe d   value .   Fr om   t he   ( 3 ) .     . . . dc L d d L q q in v C s U I S I S I       Give n     I Lq =0        . L d d in v dc I S I U Cs     ( 9 )     Re gardin g      as   a   noise   c omponent,   so   it   is   omi tt ed .   Evaluation Warning : The document was created with Spire.PDF for Python.
In t J  P ow Elec   & Dri S ys t   IS S N: 20 88 - 8 694       A reg e ner ative  b r akin g  e ner gy   recu per ation  from   el evator   …   ( A n  T hi  Hoa i Th u  A nh )   817   1 1 Cs v R p i 1 K ( 1 ) Ts + i R − * dc u dc u Ld i     Figure   9.   V oltage   c on t ro ll er   bl ock   dia gr a m       The   cl os ed - l oop   tra nsfer   f un ct ion   of   vo lt age   con t ro l   l oop .     2 1 2 11 2 2 2 11 1 2 1. ( ) . . 2 . . . () 1 ( ) 1 . . . 2 . . . 1 iV h V i V n n kV h V i V i V n k n Gs Ts k F s k T s k s s Fs F s T s s k T s k s s k s   ( 10 )     Use   t he   s ym m et ric   opti mal   m et hod   with   the   sta nd a rd   f unct ion   G k (s) .       2 2 2 1 1 1 2   ..            . 2. 2 . .         . 2 . . 2. pV n p V n i V n iV n iV i V n iV n n n k k k T C k TC T kT T       3.   SIMULATI O N   RESU LT S   The   simulat io n   is   c onduct e d   by   data   c ollec te d   f r om   O CT5B   bu il di ng - RE SCO   ne w   urba n   a rea,   Hanoi,   Viet na m.   Simulat io n   resu lt s   ve rif ying   e ne rgy   sa ving   ca pa bili ty   of   the   act ive   rect ifie r   a re   C onsi der e d   by   sce nar i os :   f ull   loa d   up - t he   m os t   e nerg y   consu mp ti on;   fu ll   l oad   dow n - the   m os t   e nergy   sa ving   w he n   t he   el evator   operat es   in   te n   fl oors   of   bu il di ngs   with   total   ti me   a bout   50, 76s   (i n   wh ic h   r unning   ti me   of   each   f loor:   acce le rati ng   ph ase - 0.6 6s,   ho l di ng   sp ee d   phas e - 2.1 4s ,   bra king   ph a se - 0.66s,   dwe ll   ti me - 2s).         Table   1.   Para m et ers   of   el e vato r   s ys te m   for   O CT5B   bu il di ng   Para m eters     Valu es   Nu m b er   of   floo rs   10   Distan ce   b etween   f lo o rs   (m )   2 ,8   Cab in 's   weig h t   (kg )   1200   Co u n terweigh t   (kg)   1600   Pass an g ers   weig h t   (kg )   1000   Maximu m   sp eed,   v ma x   (m /s )   1   Acceler atio n   an d   d eceler atio n ,   a ma x   ( m /s 2 )   1 .5   Pu lley   d iam eter ,   D   (m)   0 .4   Tr an smissio n   ratio ,   i   1 /2 0   Tr an smissio n   p erfo rm an ce,   η   80%   No m in al   p o wer   P   ( k W )   of   each   m o to r   15   Nu m b er   of   elev ato rs   2       Table   2.   Para m et ers   of   act ive   recti fiers     Para m eters   Valu es   Ph ase   in d u ctan ce,   L( m H)   2   Ph ase   resistan ce,   R   ( )   0 .05     Cap acitance   of   DC   lin k   capacito r   C   ( F )   1000     Table   3.   Para m et ers   of   c ontrol le rs       K p   T i   Cu rr en t   lo o p   2   0 .04   Vo ltag e   lo o p   0 .56   0 .00 3 5     Ph ase   Lock ed   Loo p   (PL L )   0 .74   0 .00 7         Figure   10   a nd   Figure   11   s ho w   t hat   the   s pe ed   value   wit h   fu ll   loa d   up   pr ocess   is   1m /s,   and   f ull   loa d   dow n   one   is   - 1m/ s   s uitable   for   t he   c ha nge   si tuati on   of   the   r egen e rati ve   po wer ;   na mely,   t he   powe r   as   the   f ull   load   el evat or   movin g   up   c onsu me d   up   to   2600 W   mea nwh il e   the   power   as   the   f ull   load   el evator   movin g   do wn   backs   gr i d   util it y   ab out   - 1700W .   With   oft e n   operati on   pr ocesses   of   el evato r:   acce le ra ti ng ,   holdi ng   s peed,   Evaluation Warning : The document was created with Spire.PDF for Python.
            IS S N :   2088 - 8 694   In t J   P ow  Ele c  &  D ri   S ys t,   V ol .  12 , N o.   2 ,  J une  2021   :   811   –   821   818   br a king   ca us in g   volt age   fluct uation   on   bus   DC   de monstrat ed   in   Fi gure   12   with   t he   di ode   recti fier.   In   t he   case   of   f ull   l oad   up,   tract io n   m otor   op e rati ng   in   a ccel erati ng   ph a se   needs   to   m obil iz e   po wer ,   so   volt age   de cr ease,   vo lt age   fl uctua ti on   is   from   620   to   650V   DC   (F ig ur e   12   (a ));   with   fu ll   l oad   dow n,   the   trac ti on   mo t or   w orks   as   the   el ect ric   ge ner at or   t urnin g   power   to   li ne,   w hich   ca use s   volt age   on   DC   bus   to   i ncr ease   f rom   650   to   800VDC   (F i gure   12   ( b)).         0 1 S p e e d   ( m / s ) T i m e   ( s ) 0 10 20 50 . 76 30 40 0 . 5     (a)   - 1 0 - 0 . 5 0 10 20 50 . 76 30 40 S p e e d   ( m / s ) T im e   ( s )     (b)     Figure   10.   Sp e ed   respo ns es,   (a )   f ull   loa d   up,   (b)   fu ll   loa d   do wn       - 500 0 500 1000 1500 2000 2500 3000 3500 0 10 20 50 . 76 30 40 T im e   ( s ) P owe r   ( W )     (a)   - 2500 - 2000 - 1500 - 1000 - 500 0 0 10 20 50 . 76 30 40 T i m e   ( s ) P owe r   ( W )     (b)     Figure   11.   T he   cha ng e   sit uation   of   t he   re ge ne rati ve   power ,   (a)   f ull   load   up,   ( b)   f ull   loa d   dow n       350 400 450 500 550 600 650 700 0 10 20 50 . 76 30 40 T im e   ( s ) U d c l i n k   ( V )     (a)     350 400 450 500 550 600 650 700 750 800 850 0 10 20 50 . 76 30 40 T i me   ( s ) U d c l i n k   ( V )     (b)     Figure 12.   Re s ponse s   of   volt ag e   on   U dclink   with   diode   recti fier,   (a)   f ull   load   up,   (b)   fu ll   loa d   dow n       On   c ontrar y,   t he   act ive   recti f ie r   sti ll   ensu re s   the   gri d   vo lt age   withi n   the   range   al lo wed   650   VDC   in   Figure   13   a nd   gu a ra ntees   the   safety   of   t he   powe r   sup ply   sy ste m   of   t he   el evator   w hen   the   el evato r   r uns   up,   and   r uns   dow n   with   fu ll   loa d.   Evaluation Warning : The document was created with Spire.PDF for Python.
In t J  P ow Elec   & Dri S ys t   IS S N: 20 88 - 8 694       A reg e ner ative  b r akin g  e ner gy   recu per ation  from   el evator   …   ( A n  T hi  Hoa i Th u  A nh )   819   350 400 450 500 550 600 650 700 750 T i m e   ( s ) 0 10 20 50 . 76 30 40 U d c l i n k   ( V )     Figure   13.   Re s pons e   of   vo lt a ge   on   U dclink   with   act ive   recti fier   wh e n   fu ll   lo ad   up   an d   f ull   load   do wn.       Com par in g   le vel   of   ene rgy   savi ng   wh e n   us i ng   act ive   recti fier   in   Fi gure   14,   Fig ure   15   s how s   consu mp ti on   energ y   res ponse   of   gri d   s ource   w hen   el evato r   m ov e s   up   with   f ull   load   is   46W h,   a nd   reg e ner at i ve   braki ng   e ne rgy   tur ns   s ource   wh e n   t he   el ev at or   m oves   do wn   with   f ull   load   an d   us es   act ive   recti fier   is   15, 8Wh .   T her e f or e,   pe rcen t   of   sa vin g   ene r gy   is   33 %.       - 10 0 10 20 30 40 50 0 10 20 50 . 76 30 40 T i m e   ( s ) E n e r gy  ( Wh )   - 16 - 14 - 12 - 10 - 8 - 6 - 4 - 2 0 2 0 10 20 50 . 76 30 40 T im e   ( s ) E n e r gy  ( Wh )     Figure   14.   C onsu m ptio n   e nergy   res ponse   of   gr i d   s ource   w he n   el evat or   m oves   up   wit h   f ul l   load         Figure   15.   Re ge ner at ive   bra kin g   ene r gy   flo w s   bac k   so urce   with   act ive   recti fier   w he n   the   el evat or   moves   dow n   with   fu ll   load       4.   CONCL US I O N   In   this   pa per ,   the   main   f oc us   is   on   e nha ncin g   el e vator   eff ic ie ncy   by   re du ci ng   its   consu mp ti on   energ y.   The   simulat ion   re su l ts   of   el evat or   dr i ve   s ys te m   with   t he   act iv e   recti fier   re placi ng   di od e   one   in   OCT5B   bu il di ng - RESC O   ne w   urba n   area ,   Ha   noi,   Viet na m   s howe d   by   usi ng   act ive   rect ifie r,   ene rgy   ca n   save   up   to   33%.         ACKN OWLE DGME NTS     The   a utho rs   w ou l d   li ke   to   tha nk   U niv e rsity   of   Tra nsport   a nd   Co mm un ic at ion s   f or   fina ncial   sup port,   In sti tute   for   C ontr ol   En gine eri ng   an d   A uto m at ion   of   H US T   creati ng   a   good   researc h   e nviro nm e nt   as   wel l.       REFERE NCE S   [1]      G.   C.   B arn ey ,   an d   S.   M.   dos   Sant os ,   E le va tor   tra f f ic   analysis,   desi gn   and   con trol ,   2 nd   Edition ,   Inst   of   Eng ine er ing   &   Te chno logy,   1 98 5.   [2]      Yongming   Zha n g,   Zhe   Yan,   Fen g   Yuan,   Jiawe i   Yao,   and   B ao   D ing ,   “ A   nov el   r e construc t ion   app roa ch   to   eleva to r   ene rgy   cons erv a ti on   base d   on   a   DC   mi cro - grid   in   high - rise   bui ld ings, ”   En ergie s ,   vol.   12 ,   no.   1,   p p.   33,   2019 ,   DO I:   10. 3390/e n1201 0033 .   [3]      Gina   Barn ey,   an d   Lut f i   Al - Shar if ,   E le v at or   tra ff ic   handbook:   T h eo ry   and   p racti c e ,   Routl edge,   2015 .   [4]      Mohamm ed   H a san   Ali ,   “ Desig n   and   i mpl e mentat ion   of   an   e l ec tr ic a l   l ift   controlle d   using   PL C, ”   In te rnation al   Journal   of   Elec t rical   and   Comp ute r   Engi n ee rin g   (IJ EC E) ,   vo l.   8,   no.   4,   2018 ,   DO I:  10. 11591/ijece. v8i4 . pp194 7 - 1953 .   [5]      M.   Fat ih   Ad ak ,   Nevc iha n   Duru ,   and   H.   Ta rık   Du ru   “ El ev at or   sim ula tor   design   an d   est im a ti ng   en e rgy   co nsump ti on   of   an   eleva tor   sy stem , ”   Ene rgy   a nd   Buildings ,   vo l.   65 ,   pp .   272 - 28 0 ,   2013 ,   DO I:  10 . 1016/j.e nbui ld. 2 013. 06. 003 .   Evaluation Warning : The document was created with Spire.PDF for Python.
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