Tataiso ea li-Zig{0}}Zag Transformers

 

Tataiso ena e fana ka kakaretso e akaretsang ea li-transformer tsa zigzag-tse khethehileng-litlhophiso tsa sepheo sa matsoelintsoeke tse sebelisoang haholo bakeng sa ho theola fatše, phokotso e lumellanang, ntlafatso ea boleng ba motlakase, le -ho fetola matla a ac ho litsamaiso tsa sejoale-joale tsa motlakase. Tataiso e akaretsa melao-motheo ea ts'ebetso, litšoaneleho tsa tekheniki, menahano ea moralo, papiso le maano a mang a motheo, le lintlha tse qaqileng tsa ts'ebeliso, ho kenyeletsoa tsamaiso e sa nke lehlakore, ho hlakoloa ha harmonic, le litsamaiso tse kopaneng tsa phetolo ea matla. Tataiso e boetse e kenyelletsa lintlha tse sebetsang bakeng sa khetho, boholo, ts'ireletso le ho latela maemo a nepahetseng joalo ka IEEE C57.105 le IEC 60076.

Sistimi ea sejoale-joale-ea mekhahlelo e meraro ea motlakase hangata e sebetsa le delta-li-transformer tse hoketsoeng, tse haelloang ke sebaka sa tlhaho se sa nke lehlakore molemong oa ho thea motheo. Ka ho pharaletseng, litsamaiso tse tharo tse sa thekeseleng-mekhahlelo e meraro{4}}ebang ke litiisetso tsa delta kapa mehloling e meng-e hlahisa mathata a bohlokoa a ts'ebetso, ho kenyeletsoa ho ba sieo ha litšupiso tse hlalositsoeng, kotsi ea ho ba le mehala e fetelletseng{6}ho{7}ho{7}}ea liphoso, le mathata a ho lemoha liphoso le ho tsebahatsa sebaka. Zig-zag transformer (eo hape e tsejoang e le e hokahaneng-naleli kapa earthing transformer) e entsoe ho rarolla mathata ana.

Zig zag transformer ke-transfoma e khethehileng e nang le phetisetso e matsoelintsoeke moo tlhahiso e 'ngoe le e 'ngoe e leng kakaretso ea mekhahlelo e 'meli ka likhato tse 120. Karolo e 'ngoe le e 'ngoe ea magnetic core e arotsoe ka likarolo tse peli tse matsoelintsoeke, 'me li-coil li hokahana ka mekhahlelo e fapaneng ho theha phello ea ho hlakola ha maqhubu a leka-lekaneng ha a ntse a lumella zero{3}}maqhubu a latellanang ho phalla ka bolokolohi ka har'a khokahanyo e sa nke lehlakore.

Leha ho se nke lehlakore e le ts'ebeliso e hlahelletseng, li-zig-zag transformer li fetohile sethaleng se sebetsang ka mefuta-futa se sebeletsang mesebetsi e mengata: ho fana ka tsela e tlase-ea tšitiso bakeng sa{2}}maqhubu a fosahetseng, ho hatella li-haronics tse tharo, ho leka-lekanya matla a maqhubu, le ho sebetsa e le karolo ea bohlokoa tsamaisong e kopaneng ea matla a ac{3}.{3}

 

 

 

Leha tlhophiso ya ka hare e ka bonahala e rarahane, molaomotheo wa tshebetso o laolwa haholo ke molao wa Ampere-motlakase wa makenete ho putlaganya mapheo mothating o tshwanang o laela hore metsi a phallang moketjaneng o le mong a tsamaisane le mapheo a tsamaisanang le leoto le leng.

2.2 Tlhahlobo ea Phallo ea Hona Joale Tlas'a Maemo a Phoso

Ho utloisisa hore na li-zero-li nolofalitsoe joang, nahana ka mola-ho{2}}phoso ea motheo karolong e 'ngoe ea tsamaiso e seng molaong. Maqhubu a - a hokahantsoeng a theha mokhoa oa hona joale oa phatlalatso o itšetlehileng ka bobeli. Hajoale e phallang ho ea holimo ho tloha sebakeng se sa nke lehlakore ho pholletsa le moepa o ka tlase oa mohato oa A e feta moepeng o ka holimo oa mohato oa C ho ea ho khokahanyo ea marang-rang. Sena se etsa hore ho be le lebelo le ts'oanang karolong e ka tlase ea karolo ea C, e leng eona e fetelang marang-rang ka mohato oa B. Tatelano e tsoela pele ho kenyelletsa mekhahlelo eohle e meraro. Maikutlo a bohlokoa ke hore maqhubu 'ohle a matsoelineng a holimo, matsoelintsoeke a tlase, le khokahanyo ea lefats'e li tsamaisana, li supa ka mokhoa o hlakileng hore ke lefela{9}}maqhubu a latellanang.

Kakaretso ea zero-mehato ena ea tatellano ho mekhahlelo eohle e meraro e lekana le kakaretso ea lefatše. Tlas'a maemo a tloaelehileng a ts'ebetso, karolo{1}}mokhoa oa motlakase o fetotsoeng o tla tima, 'me ho na le ho potoloha hanyenyane feela. Ke feela ka tlas'a maemo a sa leka-lekanang-joalo ka mathata a fatše kapa meroalo e sa leka-lekaneng{4}}moo maqhubu a tatellano a leng zero{5}}a ka phallang ka har'a transformer.

2.3 Litšobotsi tsa Impedans

Tlas'a ts'ebetso e tloaelehileng, zig{0}} transformer ea zag e hlahisa ho sitisa maqhubu a latellanang a nepahetseng- le a mabe{2}, e leng se etsang hore e se bonahale tsamaisong ea motlakase nakong ea maemo a leka-lekaneng. Leha ho le joalo, ha ho na lefela-maqhubu a latellanang, transformer e fana ka tšitiso e tlase, ha e le hantle e khuts'oane-e potoloha ho se nke lehlakore ho ea fatše bakeng sa maqhubu a phoso.

Lintlha tsa bohlokoa tse laolang zero-ho sitisa tatelano li kenyelletsa palo ea ho phethoha, core geometry, leakage inductance pakeng tsa lihalofo tse peli tsa leoto ka leng, le litšobotsi tsa makenete tsa mantlha. Bokhoni ba moralo oa mantlha oa tšepe ho fokotsa phallo ea makhetlo a mararo-harmonic fluxes ke monyetla o mong o ikhethang o khethollang litlhophiso tsa zig-zag ho tsoa ho merero e meng ea motheo.

2.4 Litlhoko tse Bohlokoa tsa ho Hloma

Mokhahlelo o bulehileng-boemo ba potoloho-jwalo ka fuse kapa loose connection{2}}e sitisa ho itshetleha ha mapheo a matsubutsubu. Ha karolo e le 'ngoe e khaotsoe, ketane ea phatlalatso e hlokahalang bakeng sa likheo tsa tatellano ea li-zero-, 'me transformer ea earthing e ke ke ea hlola e laola lefatše. Ka hona, li-transformer tsa lefatše li tlameha ho hokahana ka thata le lefats'e le marang-rang ntle le lisebelisoa tse mahareng tsa mochini tse ka sitisang tsoelopele ka boomo.

 

 

 

 

Mefuta e 'meli e meholo eali-transformer tsa fatšeli sebelisoa mecheng ea motlakase: zig-zag (e hokahaneng-naleli) transformer lewye{{0}delta transformer. Khetho lipakeng tsa tsona e na le litšenyehelo tse kholo, boholo le litlamorao tsa ts'ebetso.

3.1 Boholo le Kelo ea Matla

Zig-peakanyo ya tsag e fana ka tshebetso e hodimo haholo ho feta ya grounded wye-titiso ya delta. Ka mochine oa zig-zag transformer, matsoelo a mang le a mang a tsamaea ka tlase ho mothapo-ho ea{5}}ground voltage-ka ntlha ea- e lumellang kakaretso e tlase ea lintlha tsa matla:. Ka lehlakoreng le leng, ho hlokahala hore ho be le "grounded wye{1}}delta transformerbakeng sa nako e tšoanang e sa nke lehlakore. Phapang ena e kholo e etsa hore li-zig-zag transformer li be nyane-bonyane borarong ho boemo ba kVA ho feta wye-delta transformer bakeng sa litlhoko tse ts'oanang tsa hajoale.

Baetsi ba tlaleha hore li-zig-zag transformer li fana ka litjeho tse tlase le tse nyane ho feta wye-delta transformer bakeng sa lintlha tse tšoanang tsa zero-tse li etsang khetho e ratoang lits'ebetsong tse ngata tsa motheo.

3.2 Ts'ebetso ea Harmonic

Wye{{0}delta transformer li potoloha triplen harmonics (3rd, 9th, 15th, joalo-joalo) ka har'a matsoapo a delta empa ha li felise maqhubu a sa nke lehlakore a hlahisoang ke meroalo e sa leka-lekanang. Zig-li-transformer tsa zag, ka lehlakoreng le leng, li khutlisetsa maqhubu a boraro a harmonic ho tloha ho sa nke lehlakore ho khutlela lehlakoreng la mojaro, ka mafolofolo li fokotsa li-harmonics ka lehlakoreng la bobeli. Ona ke mokhoa o fapaneng haholo le oa delta-wye transformer, moo li-harmonics tse tharo li qabeletsoeng ka har'a delta loop e koetsoeng.

3.3 Nako e Lekanyelitsoeng le Mosebetsi oa Mocheso

Mefuta ena ka bobeli e sebetsa e le-lisebelisoa tse nkang nako e khuts'oane, tseo hangata li fuoang lintlha tse 10-metsotsoana kapa -metsotso e 1-e nang le phoso ho e-na le ho lula li sebetsa. ANSI/IEEE Std. 32-1972 e hloka reite e tsoelang pele ea 3% bakeng sa lintlha tse 10-ea bobeli, ho bolelang hore lintlha tsa nako e khutšoane li lekana le makhetlo a ka bang 33 ho feta lintlha tse tsoelang pele. Banka e rekiloeng ea motsotso o le 1 e na le lintlha tse tsoelang pele tsa 7%. Tšobotsi ena ea nako le nako e fokotsa boholo le litšenyehelo tsa tlhahiso ha li bapisoa le li-transformer tse tsoelang pele tsa matla a lekanang, leha ho le joalo tsamaiso e hlokolosi ea mocheso e ntse e le bohlokoa.

 

 

 

 

4.1 Zero{1}}Ho sekena ha Tatelano

Zero-sequence impedance ke eona ntho ea bohlokoa ka ho fetisisa bakeng sa moralo oa zig{1}zag transformer. E etsa qeto ka bobeli-boholo ba hona joale ba phoso le taolo ea motlakase tlas'a maemo a sa leka-lekanang. Phetoho ea transformer feela e ka fokotsa phoso ea hona joale ho maemo a lakatsehang; ka mokhoa o mong, sehanyetsi sa kantle kapa sekontiri se kentsoeng ho se nke lehlakore se fana ka bokhoni bo eketsehileng ba ho fokotsa.

4.2 Leakage Inductance and No{1}}Load Load

Lintlha tse peli tsa bohlokoa ka ho fetisisa tsa moralo ha se-tahlehelo ea thepa (hysteresis le eddy current loss) le leakage impedance. Tsoelo-pele ea morao-rao mekhoeng ea ho hlahloba le ho etsa mohlala o lekanyelitsoeng o nolofalelitse lipalo tse nepahetseng haholoanyane tsa ho lutla ha li-zigzag, tse thusang bafuputsi le baqapi ba li-transformer ho ntlafatsa mofuta ona. Leakage reactance e ama tsela eo transformer e sebetsang ka eona hajoale-e fokotsang boitšoaro nakong ea liphoso le tšebetso ea eona ea taolo ea motlakase ka kakaretso.

4.3 Nako e Khutšoane-Le Lintlha tse Tsoelang Pele

Li-Ground transformer li sebetsa ka nako e khuts'oane haholo-le lintlha tse tsoelang pele. Potoloho e nang le boima bo fokolang ba ho se leka-lekane e ka sebelisoa ke transformer e filoeng boholo ba liphoso tsa nako-e se nang ts'ebetso e tsoelang pele. Lintlha tse tsoelang pele bakeng sa yuniti ea 10-ea metsotsoana hangata ke 3% ea nako e khutšoane-, ha bakeng sa yuniti e 1-e le 7%. Mehlala ea boholo e bontša molao-motheo ona: tsamaisong ea 12.47 kV e fanang ka 6000 A groundcur-fault current, transformer ea zig-zag e tla hloka lintlha tsa nako e khutšoanyane tsa 24.9 MVA. Tekanyetso ena ea nakoana e lumellana le tekanyo e tsoelang pele ea hoo e ka bang 0.75 MVA, e nolofalletsang banka ho sebetsana le 180 A ea nako e sa nke lehlakore ka ho tsoelang pele.

 

 

 

5.1 Mathata a Tšireletso

Ho sireletsa marang-rang a mahareng-ka li-voltage tsa zig-zag grounding transformer ho thata. Transformer differential unit e ka 'na ea haelloa ke kutlo ea ho lemoha liphoso tsa ka hare tsa fatše lehlakoreng la delta ka lebaka la "zig" ea tlhaho ea "zig" ea "zag" hammoho le litlamorao tsa tekanyo ea transfoma ea motlakase le litlatsetso tsa hajoale tse tsoang ho li-feeders tsa MV. Karolo ea Restricted Earth Fault e ka matlafatsa kutlo, le hoja karolo e ka ntle-mohato-ea phoso e nang le transformer saturation e hloka tlhokomelo e khethehileng.

Likarolo tse tloaelehileng tsa papiso ea tataiso tse bapisang angle pakeng tsa lefatše le boemo bo sa nke lehlakore ha li tšoanelehe. Ho e-na le hoo, li-detectors tsa ka ntle tsa phoso tse laolang likarolo tse fapaneng tsa li-transformer li hlahisitsoe e le li-substitutes tse sebetsang hantle. Bakeng sa ts'ireletso e sa nke lehlakore, li-unit tse tloaelehileng tse bapisang motlakase o sa nke lehlakore le li-angles tsa hajoale li kenya tšebetsong maemo a phoso a pele ho li-feeders tse phetseng hantle; likarolo tsa tataiso tse ipapisitseng le zero-ka tatellano ea boholo ba impedance li fana ka tharollo e tšepahalang haholoanyane.

5.2 Maemo a Sebetsang

Moralo, teko le tshebediso ya Zig{0}zag transformer di laolwa ke maemo a mangata. IEEE C57.105-2019 e hlalosa likhokahano le litlhophiso tsa li-transformer ho{4}}mohatong oa boraro oa litsamaiso tsa motlakase, ho kenyeletsoa metsoako eohle ea delta le wye, e thehiloeng fatše le e sa tsitsang, T{5}e hokahaneng, ea zigzag, le likhokahano tse ling tse khethehileng, tse koahelang tse peli tse peli- tse tsamaisang moea le li-auto-transform. Litekanyetso tse ling tse amehang li kenyelletsa IEEE C57.32 bakeng sa lisebelisoa tsa motheo tse sa jeleng paate, IEC 60076-25 bakeng sa bahanyetsi ba ho thella ba sa nke lehlakore, le IS 2026/IS 5553 bakeng sa liteko le ho latela ts'ebetso.

Ho bohlokoa ho hlokomela hore IEEE C57.105 qalong e ne e ngoletsoe litsamaiso tsa kabo tse nang le matla a mantlha a ho fihla ho 34.5 kV, leha melao-motheo ea eona e atoloha ho feta.

 

 

 

6.1 Tsamaiso e sa jeleng paate

Tšebeliso ea mantlha le e atileng ka ho fetesisa ea li-zig-zag transformer ke ho etsa hore ho se nke lehlakore bakeng sa litsamaiso tsa mekhahlelo e meraro-haholo-holo tsa delta- tse hokahaneng tsa li-transformer le libese tse sa sebetseng tsa jenereithara kapa li-inverter. Sesebelisoa sena se na le mesebetsi e mengata ea bohlokoa: ho fokotsa khatello ea motlakase nakong ea mothapo o le mong-ho isa-phoso ea fatše, ho fana ka litšupiso tse hlalositsoeng bakeng sa phetisetso ea tšireletso, le ho nolofalletsa ts'ebetso e tsoelang pele nakong ea maemo a sa leka-lekanang.

Lits'ebetsong tsa matla a photovoltaic le a ajoang, li-inverters tsa setso hangata ha li na khokahano e tiileng ea ho se nke lehlakore, e lebisang ho se leka-lekaneng ha motlakase le ho se sebetse hantle. Zig-li-transformer tsa zag li theha tsela e tsitsitseng, e tlase{2}}ea tšitiso ho ea fatše, ho tsitsisa tsamaiso tlas'a maemo a phoso. Bakeng sa marang-rang{{4}a matla a motlakase a nang le maemo a phahameng-a mahlahahlaha a phahameng, zig zag grounding transformer e kopantsoeng le lintho tse thibelang ho thetheloa fatše li fana ka maikutlo a ho lemoha liphoso ntle le ho hloka leeto la hang-hang-tiisetso e fanang ka tšireletso e matla bakeng sa lits'ebetso tsa bohlokoa tsa indasteri.

 

Mosebetsi oa li-transformer tsa Zig Zag:

Lipolasi tsa Moea

• E fana ka sebaka sa maiketsetso sa ho se nke lehlakore bakeng sa litsamaiso tse mahareng tsa- tsa pokello ea motlakase (mohlala, 35 kV) ho thusa ho theola
• E fana ka-mokhoa oa ho sitisa mohala o le mong{1}}ho{2}}litšitiso, ho fokotsa matla a mangata
• E hatella li-harmonics tse tharo (ea boraro, ea 9, joalo-joalo) ho tloha ho li-converter tsa turbine tsa moea
• E nyane ebile e bobebe ho feta Δ-Y grounding transformer, e loketseng moea oa lebopong

Litsamaiso tsa Solar (PV).

• E theha tšupiso ea motheo bakeng sa lehlakore la inverter AC moo ho se nke lehlakore ho sa fumaneheng
• E fokotsa-mohato o sa leka-lekaneng le inverter{1}}mantsoe a hlahisoang
• E matlafatsa matla a ho palama -voltage -ka (LVRT) e tlase, e thibela ho khaoha.
• E ka sebetsa e le mochini o kenyellelitsoeng oa filthara ho lits'ebetso tsa polokelo tsa PV +

Lisebelisoa tsa likhokahano tse feto-fetohang tsa marang-rang a sejoale-joale li bonts'itse khahleho ea zig-zag transformer grounding mahlakoreng a mabeli a mahareng- le a tlase-ea motlakase, e sebetsang hantle ho feta mokhoa o moholo oa ho theola molumo le mekhoa e meng ea mantlha ha e bapisoa le ts'ebetso e felletseng.

6.2 Harmonic Mitigation

Zig-li-transformer tsa zag li bapala karolo e kholo ho kokobetsa mathata a hona joale a bakoang ke-meroalo e sa tsitsang. Tse tharo-mohato oa bone-litsamaiso tsa kabo ea lithapo li ntse li na le bothata ba ho tlatlapa ha li-conductors ka lebaka la ho ata ha lisebelisoa tsa motlakase-mode, li-frequency drives, le{7}}mesebetsi e meng e sa tsitsang ea elektroniki. Delta-ea mantlha e hoketsoeng ea transfoma e tloaelehileng ea kabo e felisa feela li-harmonics tse tharo tlas'a maemo a boima a lekantsoeng hantle; meroalo e sa leka-lekaneng e ntse e hlahisa maqhubu a sa nke lehlakore.

Zig-li-transformer tsa zag li rarolla bothata bona ka ho fana ka-tsela e thibelang matla bakeng sa li-harmonics tse tharo ha li ntse li boloka tšitiso e phahameng bakeng sa maqhubu a motheo a maqhubu. Ho kopanya delta ka mokhoa o bohlale-zigzag le delta-wye transformer ho ka hlakola bobeli ba 5th le 7th harmonics, ho finyella 12-pulse system performance. Bakeng sa litsamaiso tse kholoanyane, li-transformer tse nyane tse ngata tse behiloeng haufi le meroalo li boloka maqhubu a sa nke lehlakore a le sebakeng sa heno, ho felisa tlhoko ea li-conductor tse sa nke lehlakore le ho ntlafatsa tekano ea moroalo oa mantlha.

6.3 Phetoho ea Motlakase oa AC{{1}DC e Kopantsoeng

Ka ntle ho lits'ebetso tse tloaelehileng tsa boleng ba matla, li-zig-zag transformer li fumane lisebelisoa ho lisebelisoa tse kopaneng tsa ac{1}}dc tse kopanyang matla a grid (ac) le photovoltaic (dc). Maqhubu a lutlang a zig-zag transformer a ka sebelisoa e le li-boost inductances tse kopaneng tsa ac-dc system, ho fokotsa palo ea likarolo le bongata ba sistimi ha e bapisoa le meralo e tloaelehileng e nang le li-inductors tse arohaneng. Mekhoa ea khale e nang le litlhaloso tse nepahetseng tsa ho lutla ha li-winding tse nang le geometry ea khutlonnetsepa e tšehetsa mokhoa oa moralo.

Lisebelisoa tse tsoetseng pele li kenyelletsa-stage shunt zigzag double-tap low-harmonic multi{3}}pulse rectifiers, moo tokiso ea zigzag e ts'ehetsang tokiso ea motlakase le ho thethefatsa{4}}lits'ebetsong tse phahameng tsa elektroniki.

6.4 Lisebelisuoa tsa Laeborari le Liphuputso

Mehaho ea liphuputso-ho kenyeletsoa li-accelerator le lisebelisoa tsa liteko tsa kabo ea matla{1}}e kentse li-zig{2}}zag transformer e le litšenyehelo-tharollo e sebetsang bakeng sa ho fokotsa matla a motlakase a bakoang ke-ke lisebelisoa tsa elektroniki tse sa tsitsang. Theko e batlang e le tlase, ho nolofatsa, ho kenya habonolo lits'ebetsong tse teng tsa phepelo, le bokhoni ba ho boloka maqhubu a sa nke lehlakore a le sebakeng a etsa hore li-zig-liphetoho tsa zag li khahle litlhophisong tsa liteko moo boleng ba matla bo amang tekanyo le tšebetso ea lisebelisoa ka kotloloho.

 

 

 

 

7.1 Ho Khetholla Mabaka-Litlhoko Tsa Hona Joale Phoso

Mohato oa pele oa ho etsa boholo ba zig{0}} transformer ea zag ke ho fumana sebaka seo u batlang ho se etsa-lefase la hajoale. Baenjineri ba meralo ba tlameha ho etsa qeto ea hore na ba tla itšetleha feela ka zero e ka hare ea transformer-e thibelang tatellano ea meeli ea hona joale kapa ho kenya sehanyetsi sa kantle. Bakeng sa lisistimi tse phahameng- tsa ho thiba tse sa khoneng ho sebetsa, melumo ea motlakase hangata e lekanyetsoa ho 5–10 A bakeng sa-seseteme ea matla a mahareng. Seseteme{10}}e hananang le eona e tlase e ka lumella mathata a 200 A kapa ho feta.

7.2 Ho bala kVA Rating

Bakeng sa nako e sa nke lehlakore () le tsamaiso ea{0}}ho-motlakase oa fatše (), nako e khuts'oane ea-reite ea kVA ea zig-zag transformer ke:

Lintlha tse tsoelang pele le tsona li tlameha ho boleloa. Bakeng sa sesebelisoa sa 10-ea bobeli, lintlha tse tsoelang pele li lekana le 3% ea lintlha tsa nako e khuts'oane, ha sesebelisoa sa motsotso o le mong se hloka 7%.

7.3 Maikutlo a Tšebeliso

Ho fapana le li-transformer tse tloaelehileng, li-grounding transformer ke lisebelisoa tse sebetsang ka linako tse ling-. Bokhoni ba tsona ba ho mamella mathata a phahameng ka nako e khuts'oane bo thusa ho fokotsa litšenyehelo haholo ha ho bapisoa le se feto-fetohang{2}}se nang le lintlha tse lekanang tse tsoelang pele. Leha ho le joalo, baqapi ba tlameha ho netefatsa hore matla a ho mamella mocheso a lumellana le nako e lebelletsoeng ea ho hlakola ea lisebelisoa tsa ts'ireletso tse holimo. Li-Ground Transformer li ka hlalosoa bakeng sa motheo o tiileng kapa bakeng sa tšebeliso ea mohanyetsi o sa nke lehlakore-oa morao o fanang ka tenyetseha ho laola{6}}boholo ba hona joale bo fosahetseng.

7.4 Ho hlomamisa le ho Komelloa

Ho kenya ts'ebetso e nepahetseng ho bohlokoa bakeng sa ts'ebetso e tšepahalang. -mesebetsi ea pele ho komporo e tlameha ho kenyelletsa liteko tsa ho sututsa, netefatso ea karo-karolelano, le ho netefatsa mohato{2}}. Botšepehi bo tlameha ho netefatsoa ka botlalo{4}}ho sitisoa ha khokahano efe kapa efe ho marang-rang ho ka etsa hore tšebetso ea lefatše e se sebetse. Liteko tsa khomishene li tlameha ho netefatsa hore transformer e hlahisa zero e tlase-e sitisang tatellano ha e ntse e boloka tatellano e phahameng- le e mpe{8}}ka tatellano ea maemo a tloaelehileng.

Bakeng sa ts'ebetso ea 50 Hz kapa 60 Hz, libaka tse koaletsoeng li tlameha ho khotsofatsa litlhoko tsa tikoloho bakeng sa ho kenya ka tlung kapa ka ntle, hangata ka liphaephe tse nang le moea oa mofuta oa 3R bakeng sa tšebeliso ea kantle.

 

 

 

8.1 Phase Continuity Sensitivity

Thibelo ea mantlha ea li-zig-zag transformer ke ho its'etleha ka mekhahlelo e meraro ea ho hokela. Ho ba sieo ha karolo e le 'ngoe ea khokahanyo ho marang-rang ho senya phepelo ea hona joale e itšetlehileng ka eona, ho felisa bokhoni ba ho tsamaisa lefatše le phoso. Boikutlo bona bo laela likhokahano tsa mekhahlelo e tšepahalang 'me bo hanana le ho kenya lisebelisoa tse ka hlahisang maemo a bulehileng-a potoloho ka boomo.

Ho fapana le disebediswa tse itshireletsang tse ikemetseng, zig{0}}zig earthing transformer di tlameha ho dula di le tshebeletsong ka nako tsohle ha mohlodi wa motlakase wa mekgahlelo e meraro o ntse o sebetsa. Haeba sefetoleli sa fatše se ka lahleha, mola o le mong-ho{4}}fall fault o ka baka boemo bo phahameng-ho-ho se nke lehlakore methating e sa foseng, 'me ho se leka-lekane ha thepa ho ka lebisa ho feto-fetoha ha lehlakore le ho felloa ke matla.

8.2 Saturation Tlas'a DC Ente

Lits'ebetsong tsa sejoale-joale tsa motlakase, ente ea hajoale ea DC-ebang e tsoa ho grid-li-inverters tse hoketsoeng, li-geomagnetic disturbances, kapa mehloling e meng-e ka baka "grounding transformer core saturation". Saturation e fokotsa ts'ebetso ea transformer ho fana ka-tsela e thibelang fatše 'me e ka lebisa mochesong o feteletseng. Ho ka 'na ha hlokahala mehato e khethehileng ea ho itlhokomela mabapi le moralo kapa tlhokomelo e eketsehileng bakeng sa litsamaiso tse nang le litaba tsa bohlokoa tsa DC.

8.3 Mathata a ho Fumana Phoso

Baenjiniere ba ts'ireletso ba tlameha ho elelloa hore mefuta e tloaelehileng ea li-relay e ka 'na ea seke ea lekana bakeng sa ho lemoha liphoso ka li-zig{1}zag transformer. Ho ka hlokahala merero e khethehileng ea ts'ireletso-ho kenyeletsoa le liyuniti tsa Restricted Earth Fault, lisebelisoa tsa ka ntle tsa ho lemoha phoso, le boholo-li likarolo tsa tataiso-li ka hlokeha bakeng sa tšireletso e felletseng.

 

 

 

Li-transformer tsa Zig-zag ke likarolo tsa bohlokoa tse nolofalletsang lisebelisoa tsa motlakase- tsa mekhahlelo e meraro. Ka ho fana ka-mokhoa oa ho sitisa "zero{4}}maqhubu a tatellano ha a ntse a hlahisa tatellano e phahameng- le e mpe-ka tatellano e fosahetseng, ba koala lekhalo lipakeng tsa lits'ebetso tsa delta/wye tse se nang motheo le polokeho le melemo ea ts'ebetso e sa nke lehlakore.

Lintlha tse ka sehloohong tse nkiloeng li kenyelletsa:

• Kaho: Six half half- windings cross-e hokahantsoeng lipakeng tsa mekhahlelo-karolong ea maoto a mararo
• Molao-motheo oa ts'ebetso: Ampere-turn balance e nolofalletsa zero-tatellano ea ho phalla ha hona joale ha o ntse o hlakola maqhubu a lekantsoeng
• Kopo ea mantlha: Ho se nke lehlakore bakeng sa litsamaiso tsa mekhahlelo e meraro e sa sebetsanoang le -(delta-fed or generator system)
• Melemo ea ts'ebetso: Ho sebetsa hantle haholo le boholo bo nyane ho feta wye-delta grounding transformer
• Lisebelisoa tsa bobeli: Harmonic bebofats (haholo-holo triplen harmonics), load balancing, integrated ac-dc conversion
• Lintlha tsa moralo: Boholo bo ipapisitse le lintlha tse fosahetseng tsa nako-(metsotsoana e 10 kapa metsotsoana e 1), palo e tsoelang pele ea 3%–7%
• Litlhoko tsa ts'ireletso: Ho hlokahala merero e khethehileng; Tšireletso e tloaelehileng e fapaneng e ka 'na ea se ke ea lekana
• Kenyelletso ea bohlokoa: Khokahano e tiileng ea karolo ho grid ea bohlokoa; ha ho na lisebelisoa tse fetohang tseleng ea ho theola fatše

Khetho lipakeng tsa zig-zag le wye-delta grounding transformer qetellong e ipapisitse le litlhoko tse ikhethileng tsa sistimi: litlhoko tsa meedi tsa hajoale, tekanyetso e teng le sebaka, litlhoko tsa phokotso ea tumellano, le takatso ea ho ba teng ha motlakase. Bakeng sa lits'ebetso tse ngata tsa motheo, ts'ebetso e phahameng ea zig-zag transformer, sebaka se senyenyane sa maoto, le ts'ebetso e ntle e lumellanang li etsa hore e be khetho e ratoang bakeng sa ho kenya lisebelisoa tse ncha.