Te Whakatau i te Kaha Utaina Mōrahi kW o te Whakawhiti 1000kVA

2025-12-18

Me pēhea te tatau i te whakatauranga kawenga kW o te whakawhiti hiko 1000kVA i runga i te tauwehenga mana

I te mea kei te whakahaerehia e tētahi whakawhiti hiko tawhito he kawenga tata ki te 200kW, ka taea e tēnei whakawhiti hiko te whakatutuki i te pikinga o te tono mēnā kei te whakaaro tātou ki te tāpiri i tētahi kawenga hou tata ki te 600kW? Ko te kaupapa matua o tēnei pātai he ariā taketake: te whanaungatanga me te rerekētanga i waenga i te kVA me te kW.

Te whanaungatanga me te rerekētanga i waenga i te kVA me te kW

Ko te kVA (kilovolt-ampere) te waeine o te mana kitea, ko te kW (kilowatt) ia e tohu ana i te waeine o te mana hohe. Haunga te mana kitea me te mana hohe, kei reira anō te mana tauhohe, e inehia ana i roto i te kvar (kilovar).

He aha ngā rerekētanga i waenga i te mana hohe, te mana tauhohe, me te mana āhua?

Mana Hohe: Ina inehia ki ngā watts (W), e tohu ana i te pūngao tuturu e pau ana, i te mahi whai hua rānei e mahia ana e te ara iahiko (hei tauira, te whakamahana, te rama).

Mana Tauhohe: Ina inehia ki te volt-amperes tauhohe (VAR), ka tautokohia e ia ngā papa aukume i roto i ngā kawenga whakauru (hei tauira, ngā motuka) engari kāore e mahi tūturu. Hei tauira, mēnā he pūnga hiko, he koiri rānei kei roto i tētahi taputapu hiko, ka utua tonutia, ka tukuna atu hoki ēnei wāhanga i te wā e mahi ana te taputapu. Nā te mea kāore ngā pūnga/koiri e kai ana i te pūngao hiko i roto i tēnei tukanga utu/tuku, ka kiia te mana e pā ana ko te mana tauhohe.

Mana Āhua: Ina inehia ki ngā volt-amperes (VA), ko te huinga o te mana hohe me te mana tauhohe, e tohu ana i te mana katoa i roto i te ara iahiko. Me whakarato e te pūtake mana (he whakawhiti hiko, he whakaputa hiko rānei) ehara i te mea ko te mana hohe anake engari ko te mana tauhohe hoki ki ngā taputapu hiko. Nā te mea, ahakoa kāore ngā pūnga i roto i te taputapu e kai ana i te mana hohe, ko tā rātou utu me te tuku tonu me whakarite tonu te pūtake mana i tētahi wāhanga o tōna kaha hei tautoko i tēnei tukanga.

I muri i te whakamārama i ēnei ariā, ka taea e tātou te tirotiro i ō rāua whanaungatanga, e ārahi ana i a tātou ki tētahi atu ariā nui: te ‌ira mana‌. Ko te nui o te mana hohe ka taea e te pūtake mana te tuku, e whakawhirinaki ana ki te ‌ira mana.

Mena ko te utu hiko he $1 mō ia kilowatt-haora (kWh), ka taea e te whakawhiti hiko e mahi ana i te tauwehenga mana o te 0.6 te whakaputa i te $600/haora i roto i te moni whiwhi ōhanga. Ina piki ake te tauwehenga mana ki te 0.9, ka taea e te whakawhiti hiko kotahi te whakaputa i te ¥900/haora i roto i te moni whiwhi 45. Ahakoa e kitea ana ngā painga pūtea o te whakapai ake i te tauwehenga mana, ko ōna pānga hangarau whānui (hei tauira, te arotau i te pumau o te whatunga me te whakaiti i ngā ngaronga pūngao) ka horapa atu i tua atu i ēnei painga tonu.

E hia ngā kilowatt (kW) ka taea e te whakawhiti hiko 1000kVA te tautoko?

I runga i ngā mōhiotanga taketake kua whakapūmautia i runga ake nei, ka taea e tātou te aro atu ki te pātai matua o tēnei tuhinga me te mārama me te tika.

Ka inehia te kaha o te whakawhiti hiko i roto i te kVA (kilovolt-amperes), ko te kaha e pau ana i ngā taputapu hiko ka inehia i roto i te kW (kilowatts). Ko te rerekētanga matua ko te tatau i te mana hohe (kW) o tētahi taputapu me whakarea tōna mana kitea (kVA) ki te tauwehe mana (cosφ). Hei tauira, ka taea anake e te whakawhiti hiko 1000kVA te tuku i te putanga kawenga katoa o te 1000kW ina whakahaerehia i te tauwehe mana o te 1.0. Heoi, he mea tino kore e taea te whakatutuki i tēnei āhuatanga pai (PF = 1.0) i roto i ngā tono o te ao tūturu.

I te wāhanga hoahoa, ki te whakatinanahia e tātou te utunga tauwehe mana hei whakatutuki i te tauwehe mana o te 0.95, me tatau te putanga mana hohe o te whakawhiti hiko kia 1000×0.95=950kW. Pānui Hira: E whakahau ana ngā ratonga hiko kia ≥0.9 te tauwehe mana (PF) hei karo i ngā whiu; heoi, ki te nui ake i te ≥PF = 1.0 ka piki ake te ngaohiko o te pūnaha, ka whakararu hoki i te pumau o te whatunga hiko.

I te tīmatanga, ka tukuna he kawenga hiko 200kW e te whakawhiti hiko 1000kVA. Whai muri i te tāpiri i tētahi kawenga hou 600kW, ka eke te katoa o te hiahia hiko hohe ki te ‌800kW‌, e noho tonu ana i roto i te rohe mahi haumaru kua tatauhia o te whakawhiti hiko.

Nō reira, ka taea e te whakawhiti hiko 1000kVA i te tīmatanga e tuku ana i te 200kW o te kawenga hiko te mahi haumaru mō te wā roa ahakoa kua tāpirihia he kawenga hou 600kW (800kW katoa), mena ka arotauhia te tauwehenga mana ki te taumata e hiahiatia ana.