Dabarun Inganta Ingancin Wutar Lantarki don Tsarin Load na VFD

Yayin da injinan sarrafa sauyin wutar lantarki (VFDs) ke kawo sauki da inganci ga samar da aiki ta atomatik, suna kuma gabatar da gurbacewar harmonic ga tsarin samar da wutar lantarki, musamman a tsarin da VFDs ke da yawa. Inganta ingancin wutar lantarki lamari ne mai mahimmanci kuma mai rikitarwa. VFDs suna haifar da igiyoyin harmonic, suna haifar da canjin wutar lantarki, gurbataccen wutar lantarki, da yuwuwar tsangwama na lantarki, wanda ke shafar aikin su da na sauran kayan aiki masu mahimmanci. Wadannan sune manyan dabarun inganta ingancin wutar lantarki a irin wadannan tsarin:

Babbar Dabara: Gudanar da Hada-hada (Hada da matakai da yawa)

1. Rage Harmonic:

Fitar da Harmonic Mai Rarrabe (Passive Filters):

Ka’ida: Wani da’irar LC da aka daidaita wanda ya kunshi inductor, capacitor, da resistors yana samar da hanyar da ba ta da karfin juriya ga takamaiman harmonics (misali, harmonic na 5, 7, 11, da 13), yana kewaya ko kuma sha su.

Amfani: Kudinsa kadan ne, tsari mai sauki kuma abin dogaro, mai saukin kulawa, kuma yana iya samar da wani bangare na ramuwar wutar lantarki mara amfani (reactive power).

Rashin amfani: Yana iya tace takamaiman harmonics kawai; yana iya zama mara daidaito saboda canjin juriyar tsarin ko kuma karkatar da sigogin tacewa, yana rage inganci; yana iya yin resonance a layi daya da tsarin, yana kara wasu harmonics; yana iya rama adadin wutar lantarki mara amfani da aka kayyade kawai.

Aikace-aikace: Ya dace da aikace-aikace inda bakan harmonic ya kasance mai tsayayye, jerin harmonic suna bayyana, kuma canjin juriyar tsarin kadan ne. Yawanci ana shigar dashi a shigarwar inverter ko kuma a kan bus na rarraba wutar lantarki.

AHF (Active Harmonic Filter):

Ka’ida: Gano abubuwan harmonic a cikin igiyar kayan aiki a lokaci guda. Wani mai sauya wutar lantarki na lantarki (power electronic converter) yana samar da igiyar harmonic mai girman daidai, amma ta gaba, wanda aka saka a cikin grid, don haka yana soke harmonics da kayan aiki ke samarwa.

Amfani: Yana iya rama harmonics da yawa a lokaci guda (yawanci oda na 2-50); ba ya shafar juriyar tsarin, babu resonance da ke faruwa; saurin amsawa (milliseconds); yana iya rama wutar lantarki mara amfani da igiyar mara daidaito (rashin daidaito na kashi uku) a lokaci guda; tasirin tacewa ba ya shafar harmonics na asali na grid.

Rashin amfani: Kudinsa yana da yawa; yana samar da wasu igiyoyin girgiza masu yawan mita (ana bukatar magance su).

Aikace-aikace: Mafi inganci kuma mafi sassauci maganin sarrafa harmonics na inverter, musamman ya dace da aikace-aikace inda bakan harmonic ke da rikitarwa, canjin kaya akai-akai, da kuma bukatun ingancin wutar lantarki mai girma. Ana iya shigar dashi a shigarwar inverter, a kan bus na rukunin kaya, ko kuma a kan babban bus na tsarin.

Gyaran Multi-pulse:

Ka’ida: Yin amfani da na’urar canza wutar lantarki mai canza lokaci (phase-shifting transformer) da aka kera musamman (misali, 12-pulse, 18-pulse, 24-pulse) don samar da wutar lantarki tare da bambance-bambancen lokaci daban-daban ga gadoji da yawa na gyara, yana sa igiyoyin harmonic na shigarwa su soke juna, don haka yana rage harmonics na musamman sosai.

Amfani: Yana rage samar da harmonic daga tushe; babban abin dogaro (maganin da ba ya aiki).

Rashin amfani: Kudin na’urar canza wutar lantarki yana da yawa, girma, yana kara asara; yana iya kawar da takamaiman harmonics kawai (misali, 12-pulse yana kawar da harmonic na 5 da 7, amma yana samar da harmonic na 11 da 13); yana bukatar daidaito mai girma a kusurwar canjin lokaci na na’urar canza wutar lantarki; ingancinsa yana raguwa a karkashin kayan aiki marasa daidaito.

Aikace-aikace: Yawanci ana amfani dashi a cikin injinan canza wutar lantarki guda daya masu karfin gaske ko kuma a aikace-aikace masu bukatun gaske; ba a yawan amfani dashi a tsarin da aka rarraba tare da injinan canza wutar lantarki masu karamin karfi da yawa.

Reactor na Rage Harmonic/Reactor na Shigarwa:

Ka’ida: Ana hada reactor a jere a shigarwar injin canza wutar lantarki don kara juriyar wutar lantarki, yana iyakance kololuwar darajar da saurin canji (di/dt) na igiyoyin harmonic, da rage yawan gurbacewar igiyar (THDi).

Amfani: Kudinsa kadan, tsari mai sauki, mai saukin shigarwa; yana iya danne wasu kololuwar wutar lantarki da karfin wutar lantarki; yana inganta rayuwar gada ta gyara inverter.

Rashin amfani: Tasirin tacewa yana da iyaka (yawanci yana rage THDi zuwa 30%~40% kawai); yana haifar da wani raguwar wutar lantarki (ya kamata a yi la’akari); yana samar da zafi nasa.

Aikace-aikace: Kusan dukkanin inverters suna amfani dashi azaman daidaitaccen ko kuma shawarar da aka ba da shawarar, yana aiki azaman mafi mahimmancin matakin rage harmonic.

2. Ramuwar Wutar Lantarki Mara Amfani da Karkatar da Wutar Lantarki:

Na’urar Ramuwar Wutar Lantarki Mara Amfani Mai Sauyi:

Static Var Generator (SVG):

Ka’ida: Ya dogara ne akan na’urar sauya wutar lantarki (IGBT) mai cikakken iko, wanda zai iya sauri (matakin millisecond) ci gaba da samarwa ko kuma sha wutar lantarki mara amfani don kiyaye kwanciyar hankalin wutar lantarki na tsarin.

Amfani: Saurin amsawa sosai, yana danne canjin wutar lantarki da kyalkyali yadda ya kamata; daidaiton ramuwa mai girma; baya haifar da resonance; yana iya rama harmonics a lokaci guda (kamar aikin AHF).

Rashin amfani: Kudinsa yana da yawa.

Aikace-aikace: Ya dace musamman da aikace-aikace inda canjin kaya mai sauri (kamar injinan birgima da crane) ke haifar da canjin wutar lantarki mai tsanani.

Thyristor-Switched Capacitors/Reactors (TSC/TSR):

Ka’ida: Thyristors suna ba da damar sauya rukunin capacitors ko reactors ba tare da tuntuɓar ba, cikin sauri, suna samun ramuwar wutar lantarki mara amfani mai mataki.

Amfani: Kudinsa kasa da SVG; lokacin amsawa yana da sauri (tens of milliseconds); yana iya samar da ramuwa mai karfin gaske.

Rashin amfani: Ramuwa tana da mataki, ba ta da santsi kamar SVG; igiyar karfin wutar lantarki da wutar lantarki mai yawa na iya faruwa yayin sauya; ana bukatar tsari mai kyau don kauce wa resonance tare da tsarin (musamman a gaban harmonics).

Aikace-aikace: Ya dace da aikace-aikace inda bukatar wutar lantarki mara amfani ke canzawa da sauri amma girman canjin bai yi tsanani ba.

Muhimmin Bayani: An haramta amfani da na’urorin sadarwa na gargajiya don sauya capacitors a tsarin da ke dauke da yawan harmonics na inverter! Wannan na iya haifar da resonance mai hadari a layi daya, yana kara igiyoyin harmonic, yana haifar da lalacewar capacitor ko ma fashewa.

Taimakon DC Bus: Ga aikace-aikace masu bukatuwa (kamar masana’antu masu inganci da cibiyoyin bayanai), yi la’akari da kara capacitors na ajiyar makamashi ko supercapacitor modules a cikin DC bus na mahimman inverters don samar da makamashi na dan lokaci don kiyaye aikin inverter yayin raguwar wutar lantarki na lokaci a cikin grid.

3. Inganta Tsarin Tsari da Shigarwa:

Zabin Na’urar Canza Wutar Lantarki:

Zabin na’urar canza wutar lantarki mai karfin juriyar gajeren kewayawa (short-circuit impedance) yana taimakawa iyakance igiyar gajeren kewayawa da wasu igiyoyin harmonic.

Yi la’akari da amfani da na’urar canza wutar lantarki ta K-Factor da aka kera musamman don kayan aiki marasa layi, saboda tsarinta zai iya jure karin zafi da igiyoyin harmonic ke samarwa.

Tsarin Rarraba Wutar Lantarki Mai Kyau:

Samar da Wutar Lantarki ta Rukuni: Samar da wutar lantarki ga kayan aikin inverter da kayan aiki marasa layi daga kayan aiki masu mahimmanci ga ingancin wutar lantarki (kamar PLCs, kayan aiki, da kwamfutoci) ta amfani da na’urorin canza wutar lantarki daban-daban ko kuma bus na rarraba daban-daban don rage tsangwama tsakanin su.

Rage Nisan Samar da Wutar Lantarki: Rage nisan kebul daga inverter zuwa babban akwatin rarraba ko na’urar canza wutar lantarki don rage juriyar layi da rage raguwar wutar lantarki da gurbacewar wutar lantarki na harmonic.

Kara Girman Kebul: Yayin da ake biyan bukatun iya daukar igiyar, kara girman kebul na shigarwa da fitarwa na inverter yadda ya kamata don rage juriyar layi, raguwar wutar lantarki, da asara, wanda kuma yana taimakawa danne gurbacewar wutar lantarki na harmonic.

Kasa da Rufe:

Kyakkyawan Kasa: Tabbatar da cewa dukkan tsarin (akwatin inverter, motoci, tacewa, AHF/SVG, da sauransu) yana da kyakkyawan kasa mai karancin juriya, kasa guda daya ko kuma kasa daidai, don kauce wa igiyoyin madauki na kasa. Yi amfani da wayar kasa ta musamman mai kauri mai isasshen girma.

Kebul Mai Rufe: Kebul daga fitarwar inverter zuwa mota dole ne ya zama kebul mai rufe daidai (misali, kebul mai rufe mai uku daidai ko kuma kebul mai uku uku tare da rufe kowane daya). Dole ne a kasa rufin tare da zobe na digiri 360 a duka karshen inverter da mota.

Rarraba Kebul na Shigarwa: Layukan wutar lantarki na shigarwa na inverter, layukan mota na fitarwa, da layukan siginar sarrafawa ya kamata a shimfida su daban (zai fi dacewa a cikin tireloli na kebul daban-daban ko kuma tare da tazara mai isasshe), kauce wa dogon layi daya, kuma a haye su a tsaye a duk lokacin da zai yiwu. Yi amfani da kebul mai rufe da aka karkata biyu (twisted-pair shielded cable) don layukan siginar.

Danne Tsangwama na Yanayi Gama Gari (Common-Mode Interference):

Shigar da choke na yanayi gama gari ko ferrite core a fitarwar inverter don danne igiyar yanayi gama gari mai yawan mita.

Shigar da reactor na fitarwa ko dv/dt tacewa a karshen mota don rage saurin canjin wutar lantarki akan kebul na fitarwa, rage damuwa na rufi da tsangwama na lantarki ga mota.

Yi la’akari da shigar da tacewar igiyar sine (sine wave filter) tsakanin mota da inverter don samun siffar wutar lantarki kusan igiyar sine a karshen mota.

4. Kula da Ingancin Wutar Lantarki da Gudanarwa:

Shigar da Na’urorin Kula da Ingancin Wutar Lantarki a Yanar Gizo: Shigar da na’urorin nazarin ingancin wutar lantarki a yanar gizo a wurare masu mahimmanci (kamar hanyoyin shigar tsarin, gaban kayan aiki masu mahimmanci, da gaba da bayan wuraren shigar AHF/SVG) don ci gaba da lura da sigogi kamar wutar lantarki, igiyar, harmonics (THDv, THDi, abun ciki na harmonic), kyalkyali, canjin wutar lantarki, da karfin wutar lantarki.

Kafa Ma’auni da Faɗakarwa: Saita iyakoki na al’ada da matakan faɗakarwa don sigogin ingancin wutar lantarki don gano rashin daidaituwa cikin sauri.

Binciken Bayanai da Ingantawa: Bincika bayanan tarihi don gano alamu da tushen matsalolin ingancin wutar lantarki, kimanta tasirin matakan ragewa, da samar da tushe don kara inganta tsarin tsari da aiki.

Shawarwarin Aiwatarwa:

1. Kimanta Halin Yanzu: Da farko, gudanar da gwajin ingancin wutar lantarki cikakke (zai fi dacewa a karkashin yanayin aiki daban-daban) don auna tsananin da halayen bakan na matsaloli kamar harmonics, canjin wutar lantarki, da karfin wutar lantarki.

2. Ayyana Manufofi: Dangane da juriyar kayan aiki, bukatun kwangilar samar da wutar lantarki, ko kuma ka’idojin da suka dace (kamar IEEE 519, GB/T 14549), ƙayyade manufofin ingancin wutar lantarki da ake bukata (misali, THDv < 5%, THDi < 8%, canjin wutar lantarki < 3%).

3. Tsarin Tsari da Kwaikwayo: Dangane da sakamakon kimantawa da manufofi, tsara cikakken tsarin ragewa. Ana ba da shawarar sosai don amfani da software na kwaikwayo na tsarin wutar lantarki na kwararru (kamar ETAP, PSCAD, EMTP-RV) don yin samfuri da kwaikwayon tsarin, hasashen tasirin ragewa, tantance hadarin resonance, da inganta sigogin kayan aiki da wuraren daidaitawa (misali, wuraren shigar AHF/SVG, wuraren daidaita tacewa).

4. Aiwatarwa ta Mataki: Ga manyan tsarin, ana iya aiwatar da matakan ragewa a matakai. Misali, da farko shigar da reactors na shigarwa ga dukkan injinan canza wutar lantarki, sannan shigar da AHF a yankin da ya fi fama da matsala ko kuma a kan busbar, kuma a hankali a fadada zuwa sauran yankuna ko kuma kara SVG don magance matsalolin canjin wutar lantarki.

5. Zabin Kayan Aiki da Shigarwa: Zabi manyan kamfanoni da samfuran da suka balaga a fasaha kuma abin dogaro. Bi ka’idojin masana’anta da ka’idojin kwararru don shigarwa, wayoyi, da kasa.

6. Gwaji da Tabbatarwa: Bayan shigarwa, kayan aikin sarrafa ingancin wutar lantarki dole ne a yi musu cikakken gwaji da gwajin ingancin wutar lantarki na biyu don tabbatar da cewa tasirin ainihi ya cika manufofin da ake tsammani.

7. Ci gaba da Kulawa da Kula: Kafa tsarin kula da ingancin wutar lantarki na yau da kullun da tsarin kulawa don tabbatar da ingantaccen aiki na dogon lokaci na kayan aikin sarrafa ingancin wutar lantarki.

Takaitawa:

Babu wani magani guda daya don inganta ingancin wutar lantarki a tsarin da ke da yawan kayan aikin inverter; hanyar hada-hada ta zama dole. Muhimman ka’idoji sune ingantaccen danne harmonic (AHF ya fi dacewa), ramuwar wutar lantarki mara amfani mai sauri da karkatar da wutar lantarki (SVG ko TSC ya fi dacewa), tare da inganta tsarin tsari (na’urorin canza wutar lantarki, samar da wutar lantarki ta rukuni, layuka), daidaitaccen shigarwa da rufe kasa, da ci gaba da kulawa da gudanarwa. Ta hanyar tsari mai kyau, zane na kwararru, da aiwatarwa mai tsauri, ana iya inganta ingancin wutar lantarki na tsarin sosai, tabbatar da aminci da kwanciyar hankalin aikin kayan aiki, inganta ingancin makamashi, da cika ka’idoji da sharudda masu dacewa.