Zvichienderana neruzivo rwesimba remhando yemagetsi, patinosarudzainoshanda harmonic sefa, mafomula maviri anowanzoshandiswa kufungidzira kugona kwekudzvinyirira kweharmonic.
1.Centralized governance: Kufungidzira kukwanisa kwekugadzirisa kwehutongi hwehutongi hunoenderana nekugadzirwa kwemabhizimisi uye simba rekushandura.
S---- Transformer yakayerwa kugona, U---- Yakatemerwa voltage padivi rechipiri reU-transformer.
Ih---- Harmonic yazvino, THDi---- Yese yazvino kukanganisa mwero, ine huwandu hwemhando dzakatemerwa zvichienderana neakasiyana maindasitiri kana mitoro.
K---- Transformer load rate
| Indasitiri mhando | Yakajairika harmonic distortion rate% |
| Subway, Tunnels, High-speed zvitima, Airports | 15% |
| Kukurukurirana, zvivakwa zvekutengesa, Mabhangi | 20% |
| Indasitiri yezvokurapa | 25% |
| Kugadzira mota, kugadzira ngarava | 30% |
| Chemical\Petroleum | 35% |
| Metallurgical industry | 40% |
2.Panzvimbo yekutonga saiti: Enzanisa kugona kwekugadzirisa kwehutongi hwehutongi hunoenderana neakasiyana masevhisi.
Ih---- Harmonic ikozvino, THDi----Hsero yazvino yekukanganisa mwero, ine huwandu hwehuwandu hwakatemerwa zvichienderana neakasiyana maindasitiri kana mitoro
K--- Transformer mutoro mwero
| Rodha mhando | Yakajairika harmonic content% | Rodha mhando | Yakajairika harmonic content% |
| Inverter | 30---50 | Medium frequency induction heat power supply | 30---35 |
| Elevator | 15---30 | Six pulse rectifier | 28---38 |
| Mwenje dze LED | 15---20 | Gumi nembiri pulse rectifier | 10---12 |
| Mwenje wekuchengetedza simba | 15---30 | Magetsi welding muchina | 25---58 |
| Electronic ballast | 15---18 | Variable frequency air conditioning | 6----34 |
| Kuchinja kwemagetsi magetsi | 20---30 | UPS | 10---25 |
Cherechedzo: Maverengero ari pamusoro anongori mafomula efungidziro ereferensi.
Patinosarudzastatic var jenareta, mafomula maviri anowanzo shandiswa kufungidzira kugona kweiyo reactive simba muripo.
1.Estimate yakavakirwa pane transformer kugona:
20% kusvika 40% ye transformer simba rinoshandiswa kugadzirisa reactive simba rekubhadhara simba, pamwe nesarudzo yakawanda ye30%.
Q=30%*S
Q---- Reactive simba muripo wesimba, S---- Transformer kugona
Semuenzaniso, 1000kVA transformer ine 300kvar reactive simba muripo.
2.Calculate yakavakirwa pane simba chinhu uye rinoshanda simba remidziyo:
Kana paine yakadzama mitoro paramita, senge yakakura inoshanda simba P, simba chinhu COSO pamberi pemuripo, uye chinangwa chesimba chinhu COSO mushure mekubhadharwa, iyo chaiyo muripo inodiwa kune system inogona kuverengerwa zvakananga:
Q----Reactive simba muripo wesimba, P----Maximum anoshanda simba
K----Average load coefficient(kazhinji inotorwa se 0.7--0.8)
Cherechedzo: Maverengero ari pamusoro ndeekutarisa chete.
Noker Electric yakazvipira kupa vatengi vane systematic reactive simba muripo uye harmonic control mhinduro, chero mibvunzo mukusarudzwa kwechigadzirwa, wakasununguka kutibata.
Nguva yekutumira: Zvita-08-2023