Peb-theem AC lub zog ntsuas hluav taws xob yog cov cuab yeej tseem ceeb hauv kev ntsuas hluav taws xob. Cov kev txwv sab saud ntawm lawv cov ntsuas hluav taws xob tsis yog tus nqi ruaj khov, tab sis ncaj qha txiav txim siab los ntawm txoj kev sib txuas. Muaj peb hom tseem ceeb: hom kev sib txuas ncaj qha, sab nraud tam sim no transformer (CT) hom, thiab voltage transformer (VT) + tam sim no transformer (CT) ua ke hom. Vim qhov sib txawv ntawm cov qauv tsim, yoog raws qib voltage thiab cov yam ntxwv ntawm kev thauj khoom, lawv muaj qhov sib txawv ntawm lub zog siab tshaj plaws thiab daim ntawv thov scenarios.
Kab lus no yuav qhia meej txog cov yam ntxwv tseem ceeb ntawm ntau hom hluav taws xob ntsuas hluav taws xob los ntawm plaub qhov ntev: lub hauv paus ntsiab lus, kev xam cov logic, qhov txwv siab tshaj ntawm kev ntsuas ntau, thiab qhov kev hloov pauv ntawm qhov xwm txheej.
Direct-Kev Sib Txuas Peb-Phase AC Hluav Taws Xob Meter
Kev Sib Txuas Txoj Cai thiab Lub Hwj Chim Kev Ntsuas Kev Ntsuas
Direct-kev sib txuas hluav taws xob ntsuas tsis tas yuav hloov pauv tam sim no ntxiv. Tam sim no ntws ncaj qha los ntawm cov kauj tam sim no, thiab qhov hluav taws xob txuas ncaj qha rau hauv qhov hluav taws xob hauv hluav taws xob, ua rau lawv tsim nyog rau qis -voltage fais fab faib tshuab (piv txwv li, ntsuas voltage 380V). Lawv lub zog siab tshaj plaws yog txiav txim siab los ntawm lawv cov ntsuas tam sim no, thiab cov qauv kev suav lej tseem ceeb yog:
▶ Pₘₐₓ=√3 × Uₙ × Iₙₘₐₓ × cosφ
Qhov twg: Uₙ=380V (rated kab voltage ntawm qhov qis-voltage system), Iₙₘₐₓ yog qhov siab tshaj plaws tam sim no ntawm lub ntsuas hluav taws xob, thiab cosφ yog lub zog hluav taws xob (feem ntau yog 0.8 rau cov khoom lag luam thiab 1 rau cov khoom hnyav hnyav).
Upper Limit ntawm Maximum Fais Fab
Siv UBS ncaj qha-kev sib txuas peb-theem AC lub zog ntsuas hluav taws xob ua piv txwv (tseem siv tau rau peb-theem AC them pawg thiab lwm yam xwm txheej), nws qhov siab tshaj plaws tam sim no feem ntau yog 0.25-5 (65) A (tus nqi hauv kab lus yog qhov siab tshaj plaws tam sim no). Siv qhov hluav taws xob ntawm 380V ua piv txwv, cov kev suav hauv qab no tau ua:
Thaum cosφ=0.8, Pₘₐₓ=√3×380V×65A×0.8≈34.45kW;
Thaum cosφ=1, Pₘₐₓ=√3×380V×65A×1≈42.9kW.
Ob peb lub tuam txhab muab cov khoom lag luam nrog qhov siab tshaj plaws tam sim no ntawm 120A, sib haum rau lub zog siab tshaj plaws ntawm kwv yees li 79kW, tab sis qhov siab tshaj plaws txhawb zog ntawm cov khoom tseem ceeb yog concentrated nyob rau hauv 20-70kW ntau.
Siv tau Scenarios
Vim qhov kev tshem tawm ntawm qhov xav tau tam sim no transformers, yooj yim ntawm installation, tsis tshua muaj nqi, thiab ntau yam adaptability rau qis - fais fab loads, ncaj qha - txuas lub zog meters yog tsuas yog siv rau:
- Peb-theem ntsuas nyob rau hauv cov zej zog nyob (xws li villas thiab townhouses);
- Cov khoom lag luam me me xws li cov khw muag khoom me thiab cov khw muag khoom yooj yim;
- Tsawg-voltage, qis- cov khoom siv hluav taws xob hauv cov chaw sim thiab cov chaw ua haujlwm me me (xws li cov cuab yeej siv tshuab me thiab cov cuab yeej ua pa);
- Hauv zos low-voltage distribution branch metering in office buildings.
External Current Transformer (CT) Hom Peb -Phase AC Zog Meter
Kev Sib Txuas Txoj Cai thiab Lub Hwj Chim Kev Ntsuas Kev Ntsuas
Cov qauv tsim ntawm hom hluav taws xob ntsuas hluav taws xob no yog "me me tam sim no ntsuas + qhov loj tam sim no": qhov ntsuas tam sim no ntawm lub zog ntsuas nws tus kheej tsuas yog 0.01-0.05 (6) A / 1 (6) A (UBS specification), thiab qhov ntsuas tam sim no yog txiav txim siab los ntawm thawj tam sim no ntawm CT sab nraud. Lub luag haujlwm ntawm CT yog hloov cov tam sim no loj hauv kab mus rau hauv ib qho me me tam sim no (xws li 5A) cov tswv yim rau lub zog ntsuas raws li qhov hloov pauv ruaj khov. Yog li, qhov siab tshaj plaws lub zog txwv nyob ntawm qhov tseem ceeb tam sim no ntawm CT, thiab cov qauv kev suav yog:
▶ Pₘₐₓ=√3 × Uₙ × I₁ × cosφ
Qhov twg: Uₙ=380V (tsis tshua muaj hluav taws xob / nruab nrab voltage tsawg voltage sab), I₁ yog qhov siab tshaj plaws ntsuas tam sim no ntawm thawj sab ntawm CT, thiab cosφ yog npaum li 0.8-1.
Lub zog siab tshaj plaws
Thawj qhov tshwj xeeb tam sim no ntawm CTs npog ntau yam, los ntawm 50A mus rau 3000A, nrog rau lub zog siab tshaj plaws nce hauv ib kauj ruam:
- CT me (50/5A): I₁=50A, Pₘₐₓ≈26.5kW;
- Nruab nrab CT (200/5A): I₁=200A, Pₘₐₓ≈106kW;
- Loj CT (1000/5A): I₁=1000A, Pₘₐₓ≈530kW;
- Ntxiv -loj CT (3000/5A): I₁=3000A, Pₘₐₓ≈1590kW (1.59MW).
Nyob rau hauv txoj kev xav, ntev li ntev raws li CT specifications phim, hom lub zog ntsuas no tuaj yeem txhawb nqa nruab nrab thiab siab zog ntsuas ntawm 20kW-2MW, ua rau nws xaiv qhov tseem ceeb rau kev lag luam scenarios.
Siv tau Scenarios
Nrog rau ntau qhov txuas ntxiv los ntawm CT, lub ntsuas hluav taws xob tuaj yeem hloov kho mus rau nruab nrab thiab qis voltage sab, nrog rau qhov tsis tshua muaj hluav taws xob siab - fais fab loads. Nws yog tsuas yog siv nyob rau hauv:
- Cov me me thiab nruab nrab-cov chaw tsim khoom loj (xws li machining, textiles, thiab electronics manufacturing);
- Kev ntsuas hluav taws xob tseem ceeb hauv kev lag luam thiab chaw ua haujlwm;
- Ceg circuits rau siab - cov khoom siv fais fab xws li lub hauv paus cua txias thiab elevator hauv cov khw loj thiab tsev so;
- Tsawg-voltage fais fab faib tshuab nyob rau hauv lub nroog substations thiab industrial parks.
Voltage Transformer (VT) + Tam sim no Transformer (CT) Combined Peb -Phase AC Zog Meter
Kev Sib Txuas Txoj Cai thiab Lub Hwj Chim Kev Ntsuas Kev Ntsuas
Hom hluav taws xob ntsuas hluav taws xob no tshwj xeeb tsim los rau siab -voltage fais fab faib tshuab (10kV, 35kV, 110kV, thiab lwm yam). Nws yuav tsum tau ob qho tib si VT thiab CT los hloov lub siab voltage thiab siab tam sim no rau tus qauv qhov tseem ceeb uas lub zog ntsuas tuaj yeem tiv taus (100V voltage, 5A tam sim no). Lub zog siab tshaj plaws yog txiav txim siab los ntawm qhov system qhov ntsuas hluav taws xob thiab CT thawj tam sim no, suav nrog cov qauv hauv qab no:
▶ Pₘₐₓ=√3 × Uₛ × I₁ × cosφ
Qhov twg: Uₛ yog qhov ntsuas kab hluav taws xob ntawm qhov siab -voltage system, I₁ yog qhov siab tshaj plaws tam sim no nyob rau sab xub ntiag ntawm CT, thiab cosφ yog 0.8-1.
Lub zog siab tshaj plaws
Qib voltage thiab CT specifications ntawm high -voltage system txiav txim siab nws lub peev xwm siab tshaj plaws:
- 10kV system + CT 600/5A: Pₘₐₓ=√3 × 10kV × 600A × 0.8 ≈ 8.3MW;
- 35kV system + CT 1000/5A: Pₘₐₓ=√3 × 35kV × 1000A × 0.8 ≈ 48.5MW;
- 110kV system + CT 3000/5A: Pₘₐₓ=√3 × 110kV × 3000A × 0.8 ≈ 474MW.
Hauv kev siv cov tswv yim, qhov siab tshaj plaws txhawb zog ntawm hom hluav taws xob ntsuas hluav taws xob tuaj yeem txuas ntxiv ntawm 5MW mus rau ntau dua 500MW, tag nrho npog qhov siab -voltage, siab - lub zog ntsuas qhov xav tau.
Siv tau Scenarios
Raws li ib tug tseem ceeb metering ntaus ntawv nyob rau hauv siab -voltage fais fab faib tshuab, nws cov kev siv yog heev concentrated nyob rau hauv:
- Kev ntsuas kab hluav taws xob- txuas hluav taws xob los ntawm cov chaw tsim hluav taws xob loj thiab chaw nres tsheb hauv dej;
- Kev ntsuas cov kab tseem ceeb hauv cheeb tsam substations thiab siab -voltage tis networks;
- High-voltage ntau lawm kab hauv kev lag luam hnyav xws li hlau, tshuaj, thiab tsis yog-ferrous hlau;
- High -voltage output metering of new energy power plant (cua fais fab, photovoltaic).
Cov ntsiab lus
| Txoj kev sib txuas | Max txhawb zog ntau yam | Core Application Scenarios | Kev xaiv qhov tseem ceeb |
|---|---|---|---|
| Kev sib txuas ncaj qha | 20-70 kWm | Tsawg-voltage me loads (chaw nyob, me me lag luam, chaw kuaj) | Sib piv cov ntsuas tam sim no ntawm cov khoom thauj; tsis muaj khoom siv ntxiv |
| Sab nraud CT Connection | 50 kW-2 MW | Nruab nrab thiab loj fais fab loads qis-voltage / nruab nrab-voltage low-side (factories, lag luam complexes) | Xaiv CT piv raws li cov load tam sim no |
| VT + CT sib txuas | 5 MW-500MW + | High-voltage ultra- siab zog loads (fais fab nroj tsuag, substations, hnyav kev lag luam) | Match system voltage thiab CT ratio; ua tau raws li siab -voltage rwb thaiv tsev yuav tsum |
Nyob rau hauv luv luv, hom kev sib txuas ncaj qha yeej nyob rau hauv cov nqe lus ntawm kev yooj yim thiab kev lag luam, sab nraud CT hom yeej nyob rau hauv cov nqe lus ntawm kev hloov pauv hloov pauv, thiab VT + CT hom sib xyaw ua ke muaj zog hauv high voltage thiab siab zog adaptation.