Ko e Faingataʻa Fakapulipuli ʻi he Ngaahi Polokalama ʻUhila ʻo Onoponi

ʻI ha mamani lelei, ʻe hoko ʻa e ʻuhila ʻoku tafe mai ʻi heʻetau ngaahi netiueka ʻuhila ko ha peau sine haohaoa mo maʻa—ko ha fengaueʻaki lelei mo tokalelei ʻo e voltage mo e lolotonga. Neongo ia, ko e moʻoni ʻo e ngaahi polokalama fakaʻuhila fakaonopooni, ʻoku fonu ʻi he ngaahi meʻangaue fakaʻilekitulonika, ʻoku mamaʻo ia mei he fakakaukau ko ʻeni. Ko e taimi kotoa pe ʻoku ke palaki ai ha device ʻoku ʻi ai ha switch-mode power supply—mei hoʻo laptop charger ki ha foʻi ʻuhila LED—ʻoku ne fakakeheʻi ʻa e waveform haohaoa ko ʻeni. ʻOku quantified ʻa e distortion ko ʻeni ʻe ha fakangatangata mahuʻinga ʻoku ʻiloa ko e Total Harmonic Distortion, pe THD. Neongo ʻe ongo hange ko ha foʻi fakakaukau fakatekinikale maʻa e kau ʻenisinia fakaʻuhila, ka ʻoku mahuʻinga ke mahino ʻa e ngaahi tefitoʻi meʻa mahuʻinga ʻo e THD ki ha taha pe ʻoku kau ʻi hono fakamahinoʻi, fokotuʻu, pe tokangaʻi ʻo e ngaahi maama lalahi. ʻE lava ke iku ʻa e ngaahi tuʻunga maʻolunga ʻo e harmonic distortion ki he fuʻu vela ʻa e transformers, circuit breakers, meʻangaue ʻoku ʻikai ngaue lelei, mo e taʻefeʻunga lahi ʻo e ivi. Ki he ngaahi pisinisi mo e ngaahi kolo ʻoku nau ʻinivesi ʻi he maama LED ki hono ivi ʻe lava ke fakahaofi ai ʻa e ivi, ʻe lava ke fakavaivaiʻi ʻe hono tukunoaʻi ʻo e THD ʻa e paʻanga ʻoku nau ʻamanaki ke aʻusia. ʻE fakamatalaʻi ʻe he fakahinohino ko ʻeni ʻa e THD, ʻo fakamatalaʻi ʻa e meʻa ko ia, founga hono fuatautau, ʻuhinga ʻoku faʻu ai ia ʻe he kau fakaʻuli LED, pea mo e ʻuhinga ʻoku ʻikai lava ai ke aleaʻi ʻa hono tauhi ia ke maʻulalo ki ha fola ʻuhila ʻoku malu mo lelei.

Ko e ha ʻa e Total Harmonic Distortion (THD)? Ko ha Fakaʻuhinga Faingofua

Ko e Total Harmonic Distortion (THD) ko ha meʻafua ia ʻoku ne quantifies ʻa e lahi ʻo e distortion ʻoku ʻi ai ʻi ha fakaʻilonga, tautautefito ʻi he tukunga ʻo e ngaahi polokalama ʻuhila, ʻa e distortion ʻo e lolotonga pe voltage waveform mei hono fotunga lelei mo haohaoa ʻo e peau ʻo e sinus. Ke mahino ʻeni, kuo pau ke tomuʻa mahino kiate kitautolu ʻa e foʻi fakakaukau ʻo e harmonics. Ko e tefitoʻi tuʻo lahi ʻo ha polokalama ʻuhila ko e tuʻo lahi ʻo e ngaue ʻa e 50 Hz ʻi he ngaahi feituʻu lahi ʻo e mamani (kau ai ʻa ʻIulope, ʻEsia mo ʻAositelelia) pe 60 Hz ʻi ʻAmelika Tokelau. Ko e harmonics ko e voltages pe currents ʻi he frequency ʻoku integer multiples ʻo e tefitoʻi tuʻo lahi ko ʻeni. Ki ha polokalama 50 Hz, ko e harmonic hono 3 ko e 150 Hz, ko e 5 ko e 250 Hz, ko e 7 ko e 350 Hz, mo e ala meʻa pehee. Ko e THD ko e fakakatoa ia ʻo e malohi (pe lahi) ʻo e ngaahi konga harmonic kotoa ko ʻeni, ʻi hono fakafehoanaki ki he malohi ʻo e tefitoʻi tuʻo lahi. Ko ha meʻafua ia ʻo e lahi ʻo e "longoaʻa" pe ivi tuʻo lahi ʻoku ʻikai fie maʻu kuo tanaki atu ki he fakaʻilonga mahuʻinga maʻa. ʻOku faʻa fakahaaʻi ia ko ha ratio ʻi he vahaʻa ʻo e 0 mo e 1 pe ko ha peseti mei he 0% ki he 100%. ʻOku fakafofongaʻi ʻe he THD ʻo e 0% (pe 0) ha peau sine haohaoa ʻoku ʻikai fakakeheʻi. ʻOku ʻuhinga ʻa e THD ʻo e 100% (pe 1) ʻoku tatau ʻa e malohi fakakatoa ʻi he harmonics mo e malohi ʻi he tefitoʻi meʻa, ʻo fakahaaʻi ai ha waveform ʻoku fuʻu mioʻi. ʻI hono fakalea fakaʻaongaʻi, ko e maʻulalo ange ʻa e tuʻunga ʻulungaanga mahuʻinga ʻo e THD, ko e maʻa mo lelei ange ia ʻa e malohi.

ʻOku fikaʻi mo fakaʻuhingaʻi fefe ʻa e THD?

ʻOku kau ʻi hono fikaʻi ʻo e THD ʻa e ʻanalaiso ʻo e fakaʻilonga, ka ʻoku hangatonu pe ʻa e tefitoʻi moʻoni. ʻOku fua ʻe he analyzer ʻo e tuʻunga lelei ʻo e malohi ʻa e fakaʻilonga ʻo e ʻuhila pea fakahoko ha ngaue fakafika ʻoku ui ko e Fast Fourier Transform (FFT). ʻOku maumauʻi ʻe he meʻa ni ʻa e waveform faingataʻa ki hono ngaahi konga fakafoʻituitui ʻo e tuʻo lahi. ʻOku ne fakahaaʻi ʻa e lahi ʻo e tuʻo lahi ʻo e tuʻo lahi (e.g., 50 Hz) mo e lahi ʻo e ngaahi tuʻo lahi kotoa pe ʻo e harmonic (e.g., 100 Hz, 150 Hz, 200 Hz, etc.). ʻOku fikaʻi leva ʻa e THD ʻaki hono toʻo ʻa e aka tapafa ʻo e fakakatoa ʻo e ngaahi tapafa ʻo e ngaahi meʻa lahi kotoa pe, vahevahe ʻaki ʻa e lahi ʻo e tefitoʻi meʻa. ʻOku liunga lahi leva ʻa e ola ʻaki ʻa e 100 ke maʻu ha peseti ʻo e peseti Ko hono fakaʻuhingaʻi ʻo e tuʻunga ʻulungaanga mahuʻinga ko ʻeni ko e ki ia ki hono fakafuofuaʻi ʻo e tuʻunga lelei ʻo e ʻOku ʻuhinga ʻa e tuʻunga ʻulungaanga mahuʻinga ʻo e THD ofi ki he 0% ko e output lolotonga pe voltage ko ha peau sine maʻa ʻaupito, mo e ngaahi konga ʻo e tuʻo lahi ʻoku meimei tatau mo e input. ʻOku lelei ʻeni. ʻOku ʻuhinga ʻa e mahuʻinga ʻoku ofi ki he 100% ʻoku ʻi ai ha lahi ʻo e harmonic distortion; ʻoku fakaʻuliʻi ʻa e fakaʻilonga ʻaki ʻa e ngaahi tuʻunga maʻolunga ʻo e ngaahi frequency kehe. Hange ko ʻeni, ʻoku ʻuhinga ʻa e THD ʻo e 15% ko e ivi fakakatoa ʻoku ʻi he ngaahi tuʻunga harmonic kotoa pe ʻoku fakatahaʻi ko e 15% ʻo e ivi ʻoku ʻi he tefitoʻi meʻa mahuʻinga. ʻOku faʻa fokotuʻu ʻa e tuʻunga ko ʻeni ʻo e mioʻi ko ha fakangatangata lahi taha ʻoku fakangofua ki he ngaahi meʻangaue fakafoʻituitui, he ʻe lava ke kamata ke fakatupu ʻe he ngaahi tuʻunga maʻolunga ange ʻa e ngaahi palopalema ʻi he netiueka ʻuhila fakalukufua.

Ko e ha ʻoku fakatupu ai ʻe he ngaahi fakaʻuli LED ʻa e mioʻi ʻo e harmonic?

Ko e tefitoʻi maʻuʻanga tokoni ʻo e harmonic distortion ʻi he ngaahi maama fakaonoponi ko e fakaʻuli LED. Ko e fakaʻuli LED ko ha maʻuʻanga ʻuhila fakaʻilekitulonika ia ʻoku ne liliu ʻa e ʻuhila AC (alternating current) ki he malohi maʻulalo ʻo e DC (direct current) ʻoku fie maʻu ʻe he LED modules. Ko e konga lahi ʻo e ngaahi fakaʻuli ko ʻeni ko e ngaahi uta ʻoku ʻikai laine. ʻOku ʻikai hange ko ha foʻi ʻuhila incandescent faingofua, ʻa ia ko ha kavenga linear resistive ʻoku ne tohoakiʻi ha ʻau molemole, sinusoidal, ʻoku ʻikai ke tohoakiʻi maʻu pe ʻe he fakaʻuli LED ʻa e lolotonga ʻi he siakale ʻo e AC. ʻI loto, ko e ʻuluaki sitepu ʻo ha driver LED angamaheni ko ha rectifier, meimei ko ha hala fakakavakava diode maʻu pe. ʻOku liliu ʻe he circuit ko ʻeni ʻa e fotunga peau AC ki ha DC pulsating. ʻOku tataki pe ʻe he diodes ʻi he hala fakakavakava ko ʻeni ʻa e lolotonga ʻi he taimi ʻoku lahi ange ai ʻa e voltage ʻi ha tuʻunga pau, ʻa ia ʻoku hoko pe ofi ki he tumutumu ʻo e AC sine wave. ʻOku iku ʻeni ki hono tohoakiʻi ʻe he fakaʻuli ʻa e lolotonga ʻi ha ngaahi pulses nounou mo amplitude maʻolunga kae ʻikai ko ha peau molemole mo hokohoko. ʻOku koloaʻia ʻa e pulsed current ko ʻeni ʻi he harmonic frequency. ʻOku hanga ʻe he ngaue ʻo e feliliuaki ʻo e diodes, fakataha mo e tuʻo lahi ʻo e feliliuaki ʻo e malohi ʻo e fakaʻuli, ʻo tuʻusi lelei ʻa e waveform lolotonga, ʻo toe fakahu ʻa e ngaahi ʻau harmonic ko ʻeni ki he maʻuʻanga ʻuhila. Ko e lahi ange ʻa e kavenga, pea ko e kovi ange hono fokotuʻutuʻu ʻo e maʻuʻanga ʻuhila, ko e lahi ange ia ʻa e mioʻi ʻo e waveform lolotonga, pea ko e maʻolunga ange ia ʻa e THD.

Ko e ha e meʻa ʻoku hoko ʻi loto ʻi ha fakaʻuli LED ke faʻu ʻaki ʻa e harmonics?

Ke sioloto atu ki he meʻa ni, fakakaukau atu ki he voltage ʻo e AC ko ha foʻi tafungofunga ʻoku teka mamalie. ʻE hanga ʻe ha kavenga laine hange ko ha meʻa fakamafana ʻo tohoakiʻi lelei ʻa e ʻau ʻo aʻu ki ʻolunga mo hifo ʻi he tafungofunga ko ia. Neongo ia, ʻoku hange ʻa e fakaʻuli LED ʻoku ʻikai laine, ko ha tokotaha lue lalo ʻoku vave mo mamafa pe ʻi he tumutumu ʻo e tafungofunga. ʻOku toki fakahoko pe ʻe he diode bridge rectifier ʻi he taimi ʻoku maʻolunga ange ai ʻa e AC voltage ʻi he voltage ʻoku tauhi ʻi he input capacitors ʻa e fakaʻuli. ʻOku hoko ʻeni ʻi ha vahaʻa taimi nounou ʻi he tumutumu lelei mo kovi ʻo e sine wave. Ko hono ola ko ha waveform lolotonga ʻoku fasiʻi mo spiky pulses kae ʻikai ko ha piko molemole mo falahi. Ko e ngaahi pulses masila mo taʻehokohoko ko ʻeni, ʻi he tuʻo lahi, ʻoku faʻu ʻaki ha ngaahi harmonics lahi. ʻE lava ke malohi ʻa e tefitoʻi konga ʻo e 50 Hz, ka ʻe ʻi ai foki mo ha ivi mahuʻinga ʻi he 150 Hz (3rd harmonic), 250 Hz (5th harmonic), 350 Hz (7th harmonic), mo e ala meʻa pehee. ʻOku tafe mai ʻa e ngaahi ʻau harmonic ko ʻeni mei he fakaʻuli ki he uaea ʻo e fale ʻo aʻu atu ki he utility transformer. ʻOku ʻikai ke nau tokoni ki hono fai ʻo e ngaue ʻaonga; ka ʻoku nau fakafofongaʻi ʻa e ivi maumau ʻoku mafola takai ʻi he sisitemi ʻuhila, ʻo fakatupu ai ʻa e vela mo e fakahohaʻasi.

Ko e ha ʻoku fuʻu mahuʻinga ai ʻa e Total Harmonic Distortion ʻi hono fokotuʻu ʻo e mama?

ʻOku tupu ʻa e mahuʻinga ʻo e THD mei he ngaahi nunuʻa fakakatoa mo maumau ʻoku maʻu ʻe he harmonic currents ʻi ha fola fakaʻuhila kakato. ʻE lava ke ʻi ai ha ola siʻisiʻi ʻo ha fakaʻuli LED ʻe taha ʻoku maʻolunga ʻa e THD. Neongo ia, ʻi ha fale fakaonopooni, ʻe lava ke laungeau pe lauiafe ʻa e kau fakaʻuli ko ʻeni—ʻi he ngaahi maama LED, komipiuta, monitoa, mo ha ngaahi meʻangaue kehe taʻefaʻalaua. ʻOku tanaki atu ʻa e harmonic currents mei he ngaahi kavenga ʻoku ʻikai ke laine ʻi he ngaahi conductors ʻoku ʻikai kau ki ai mo e transformers ʻo e tufakiʻanga naunau. ʻOku iku ʻa e tanaki ko ʻeni ki ha ngaahi nunuʻa kovi. Ko e vave taha ko e fuʻu vela. ʻOku ʻikai ke kaniseli ʻa e harmonic currents, tautautefito ki he 3rd harmonic mo hono multiples (ʻoku ui ko e "triplen" harmonics), ʻi he uaea ʻoku ʻikai kau ki ai ʻo hange ko ia ʻoku fai ʻe he ngaahi tefitoʻi ʻau. Ka ʻoku nau tanaki atu, ʻo fakatupu ai ʻa e conductor ʻoku ʻikai kau ki ai ke ʻave ʻa e ʻau ʻo aʻu ki he taimi ʻoku potupotutatau lelei ai ʻa e ngaahi konga. ʻE lava ke iku ʻeni ki he fuʻu vela ʻo e ngaahi meʻa ʻoku ʻikai kau ki ai, ko ha fakatuʻutamaki lahi ʻo e vela. ʻOku toe fokotuʻutuʻu foki ʻa e transformers ke ne tokangaʻi ʻa e malohi ʻi he tuʻo lahi taha; ʻOku fakatupu ʻe he harmonic currents ʻa e lahi ange ʻo e mole ʻo e eddy current mo e mole hysteresis ʻi honau ngaahi uho ʻo e makinito, ʻo iku ki he fuʻu vela, siʻisiʻi ʻa e lavameʻa, mo e fakanounouʻi ʻo e moʻui. ʻE lava foki ke uesia ʻa e circuit breakers mo e fuse, he ʻe ʻikai ke nau fetaulaki lelei ʻi he taimi ʻoku ʻave ai ʻa e ngaahi ʻau ʻoku ʻikai sinusoidal, ʻo uesia ai ʻa e malu.

ʻOku uesia fefe ʻe he THD maʻolunga ʻa e lelei ʻo e polokalama ʻuhila mo e ngaahi meʻangaue kehe?

Makehe mei he ngaahi fakatuʻutamaki fakatuʻasino ʻo e fuʻu vela, ʻoku holoki ʻe he THD maʻolunga ʻa e tuʻunga lelei fakalukufua ʻo ha sisitemi ʻuhila. ʻOku fakafofongaʻi ʻe he harmonic currents ʻa e ivi kuo maumauʻi—ʻoku ʻikai ke nau fai ha ngaue ʻaonga ka ʻoku kei faʻu, feʻaveʻaki, mo dissipated ko e vela ʻi he transformers, uaea, mo e ngaahi meʻangaue kehe. ʻOku fakalahi ʻe he meʻa ni ʻa e fakakatoa ʻo e ʻuhila ʻoku maʻu mei he ʻuhila, ʻo iku ki he maʻolunga ange ʻa e moʻua ʻuhila, tautautefito ki he kau fakatau fakakomesiale mo e ngaueʻanga ʻa ia ʻe ala moʻua ki ai ha ngaahi tautea ki he maʻulalo ʻa e ʻuhila, ʻa ia ʻoku fekauʻaki vaofi mo e fehalaaki ʻo e harmonic. ʻOku uesia foki ʻe he mioʻi ʻa e ngaue totonu ʻa e ngaahi meʻangaue fakaʻilekitulonika pelepelengesi kehe ʻoku fehokotaki ki he netiueka ʻuhila tatau. ʻE lava ke fakatupu ʻe he voltage distortion, ʻa ia ʻoku fakatupu ʻe he harmonic currents ʻoku tafe mai ʻi he impedance ʻo e polokalama, ʻa e ngaahi feituʻu kolosi noa ʻo e voltage sine wave ke liliu pe longoaʻa. ʻOku fakaʻaongaʻi ʻe he ngaahi meʻangaue fakaʻilekitulonika lahi ʻa e ngaahi feituʻu ko ʻeni ki he taimi mo e mapuleʻi. ʻE lava ke ʻikai ngaue lelei ʻa e voltage ʻoku mioʻi, ʻo iku ki he ʻulungaanga taʻefeʻunga ʻi he ngaahi komipiuta, meʻangaue fakafaitoʻo, mo e ngaahi polokalama puleʻi ʻo e ngaue. Ko hono moʻoni, ʻoku hanga ʻe he THD maʻolunga ʻo ʻai ʻa e ʻatakai fakaʻuhila kotoa ke "longoaʻa" mo taʻefalalaʻanga, ʻo uesia ai ʻa e meʻa kotoa pe mei he mama ki he ngaahi meʻangaue ʻoku palaki ki he holisi ofi mai.

Ko e ha ʻa e tuʻunga lelei ʻo e THD ki he ngaahi fakaʻuli mo e maama LED?

Koeʻuhi ko e ngaahi palopalema ʻoku fakatupu ʻe he THD maʻolunga, kuo ʻasi mai ʻa e ngaahi tuʻunga moʻui mo e ngaahi founga lelei taha ke fakamahinoʻi ʻa e ngaahi fakangatangata ʻoku tali. Ki he ngaahi meʻangaue maama fakaonopooni, ʻoku angamaheni ʻaki ʻeni ʻa e ngaahi tuʻutuʻuni fakaʻuhila ʻi he ngaahi feituʻu fakakomesiale mo fakangaueʻanga foʻou ke fie maʻu ke siʻisiʻi ange ʻi he 20% ʻa e lahi taha ʻo e Total Harmonic Distortion ʻo ha maama LED pe fakaʻuli fakafoʻituitui. Ko e THD ʻoku siʻi hifo ʻi he 15% ʻoku faʻa lau ia ko e lelei, ʻo fakahaaʻi ai ʻoku kau ʻi he palani ʻa e fakaʻuli ʻa e sivi harmonic lelei. ʻOku lelei ʻaupito ʻa e THD ʻi lalo ʻi he 10%. ʻOku ʻuhinga ʻeni ʻoku tohoakiʻi ʻe he fakaʻuli ha ʻau ʻoku maʻa ange, sinusoidal ange, ʻo fakasiʻisiʻi ʻene uesia ʻa e grid ʻuhila. ʻI he taimi ʻoku palani ai ha fuʻu LED retrofit pe langa foʻou, ʻoku mahuʻinga ke fakamahinoʻi ʻa e ngaahi maama ʻoku maʻulalo ʻa e THD. Neongo ʻe kiʻi maʻolunga ange ʻenau totongi kimuʻa ʻi he ngaahi fili maʻamaʻa mo maʻolunga ʻo e THD, ʻoku lahi ʻa e ngaahi lelei taimi loloa. ʻOku nau fakapapauʻi ʻoku ngaue lelei, malu mo falalaʻanga ʻa e polokalama fakaʻuhila fakalukufua, ʻo taʻofi ai ʻa e maumau lahi ʻo e fakahohaʻasi, fuʻu vela ʻo e transformer, mo e ngaahi palopalema ʻe ala uesia ai ʻa e feituʻu kotoa. Ko e ʻinivesi ʻi he ngaahi fakaʻuli LED THD maʻulalo ko ha ʻinivesi ia ʻi he moʻui lelei mo e moʻui loloa ʻo hoʻo faʻunga fakaʻuhila kotoa.

Ngaahi Tafaʻaki Mahuʻinga ʻo e Total Harmonic Distortion (THD)

ʻOku fakamatalaʻi fakanounou ʻe he tepile ko ʻeni ʻa e ngaahi tefitoʻi fakakaukau fekauʻaki mo e THD ʻi he tuʻunga ʻo e maama LED.

Ko hono fakaʻosi, ko e Total Harmonic Distortion ko ha tafaʻaki mahuʻinga ia ʻo e tuʻunga lelei ʻo e mama. Ko ha meʻafua ia ʻo e "longoaʻa fakaʻuhila" ʻoku fakahu ki ha sisitemi ʻuhila ʻe he ngaahi meʻangaue ʻoku ʻikai ke laine hange ko e fakaʻuli LED. Neongo ʻoku ʻikai lava ke taʻofi ha lahi ʻo e THD ʻi he ngaahi meʻa fakaʻilekitulonika ʻo onoponi, ka ʻoku fakatuʻutamaki ʻa e ngaahi tuʻunga maʻolunga ki he lavameʻa, malu mo e moʻui loloa ʻo e meʻangaue. Ki ha taha pe ʻoku ne fakamahinoʻi pe fokotuʻu ʻa e maama LED, ʻoku mahuʻinga ʻa e fakamuʻomuʻa ʻo e ngaahi maama mo e fakaʻuli ʻoku maʻulalo ʻenau THD—meimei siʻi hifo ʻi he 15%—ki hono fakapapauʻi ʻo ha fola ʻuhila falalaʻanga, lelei mo malu ʻoku ne fakahoko ʻa e talaʻofa kakato ʻo e tekinolosia LED.

Ngaahi Fehuʻi ʻOku Faʻa ʻEke Fekauʻaki mo e Total Harmonic Distortion

Ko e ha ʻa e tuʻunga malu pe tali ʻo e THD ki ha maama LED?

Ki he lahi taha ʻo e ngaahi tuʻutuʻuni ʻo e maama fakakomesiale mo fakangaueʻanga, ʻoku tali lelei ʻa e Total Harmonic Distortion (THD) ʻoku siʻi hifo ʻi he 20%, lolotonga ia ʻoku fie maʻu ha THD ʻoku siʻi hifo ʻi he 15% pea ʻoku ne fakahaaʻi ha fakaʻuli lelei maʻolunga. ʻOku aʻu ʻo aʻusia ʻe he ngaahi koloa totongi ʻe niʻihi ʻa e THD ʻi lalo ʻi he 10%. Ko e maʻulalo ange ʻa e THD, ko e siʻisiʻi ange ia ʻa e mafasia ʻi hoʻo sisitemi ʻuhila pea ko e lelei ange ia ʻa e tuʻunga lelei fakalukufua ʻo e malohi.

ʻE lava ke maumauʻi ʻe he THD maʻolunga ʻa e ngaahi meʻangaue kehe ʻi hoku fale?

ʻIo, ʻikai fakahangatonu. ʻE lava ke fakatupu ʻe he THD maʻolunga, tautautefito mei he lahi ʻo e ngaahi kavenga ʻoku ʻikai linear, ʻa e mioʻi lahi ʻo e voltage. ʻE lava ke uesia ʻe he waveform ko ʻeni ʻa e taimi mo e ngaue ʻa e ngaahi meʻangaue fakaʻilekitulonika pelepelengesi kehe, hange ko e ngaahi komipiuta, ngaahi meʻangaue fakafaitoʻo, mo e programmable logic controllers (PLCs). Neongo ia, ko e tefitoʻi maumau ko e fuʻu vela ʻo e transformers, uaea tuʻu ʻi tuʻa, mo e motors.

ʻE anga fefe haʻaku fakasiʻisiʻi ʻa e THD ʻi heʻeku fola ʻo e mama?

Ko e founga lelei taha ke fakasiʻisiʻi ʻaki ʻa e THD ʻoku ʻi he tupuʻanga: fili ʻa e ngaahi fakaʻuli LED mo e luminaires naʻe fakataumuʻa pau ki he maʻulalo ʻo e harmonic distortion. Kumi ha ngaahi koloa ʻoku siʻi hifo ʻi he 15% ʻa e THD. ʻI he ngaahi fola lolotonga, ʻe lava ke fokotuʻu ha meʻa sivi harmonic, ka ʻoku faʻa faingataʻa mo mamafa ʻeni ʻi hono fakafehoanaki ki hono fili pe ʻo e ngaahi koloa THD maʻulalo mei he kamataʻanga.