Igwe ọkụ dị n'etiti etiti ga-emepụta ọnụ ọgụgụ dị ukwuu nke harmonics n'oge eji.The harmonics ga-ọ bụghị nanị na-eme ka mpaghara myirịta resonance na usoro resonance nke ike, ma na-amụba ọdịnaya nke harmonics na ọkụ na capacitor ụgwọ akụrụngwa na ndị ọzọ akụrụngwa.Na mgbakwunye, pulse ugbu a ga-ebutekwa mmejọ na ngwaọrụ nchebe relay na ngwaọrụ akpaka, nke nwere ike ibute mgbagwoju anya na nha na nkwenye nke ike electromagnetic.
Mmetọ ikuku grid ike dị oke njọ.Maka mpụga nke sistemu ike, harmonics ga-eme ka nnyonye anya dị ukwuu na akụrụngwa nkwukọrịta na akụrụngwa elektrọnik, yana harmonics na-emerụ ahụ maka akụrụngwa ọkụ etiti oge.Ya mere, imeziwanye ogo ọkụ ọkụ nke etiti etiti abụrụla akụkụ dị mkpa nke nzaghachi.
Igwe ọkụ dị n'etiti etiti bụ ụdị ọrụ injinia pụrụ iche, nke ga-emepụta ọnụ ọgụgụ dị ukwuu nke harmonics dị elu n'oge usoro ọrụ, nke a makwaara dị ka harmonics nke etiti oge ọkụ.Ya harmonic arọ bụ tumadi 5, 7, 11 na 13 ugboro.Ịdị adị nke ọnụ ọgụgụ dị ukwuu nke harmonics dị elu ga-etinye ihe ize ndụ dị ukwuu na nchekwa na ịrụ ọrụ dị nro nke injinịa ike na akụrụngwa nkwụghachi ụgwọ nke otu ụzọ ụgbọ ala ahụ.Transformer nke nwere usoro isii nwere ike mebie harmonics nke ise na nke asaa nke ọkụ etiti etiti na-emepụta, mana ọ bụrụ na emeghị usoro mmechi kwekọrọ ekwekọ, sistemụ ahụ ga-abawanye harmonics, na-emetụta arụmọrụ kwụsiri ike nke transformer, na ọbụna mee ka onye na-atụgharị ọkụ na-ekpo ọkụ. na mmebi.
Ya mere, mgbe ị na-akwụ ụgwọ maka harmonics nke ọkụ induction ugboro ugboro nke etiti, a ghaghị ịkwụ ụgwọ nlebara anya na mkpochapụ nke harmonics, iji gbochie ngwá ọrụ nkwụghachi ụgwọ site na ịkwalite harmonics dị elu.Mgbe etiti ugboro ibu ikike ibu, ọ dị mfe ime ka tripping mberede na elu voltaji ọgwụgwụ nke substation na harmonic nnyonye anya nke ụlọ ọrụ n'akụkụ ahịrị.Dị ka ibu na-agbanwe, nkezi ike ihe nke izugbe ọkụ enweghị ike izute anyị ụlọ ọrụ ọkọlọtọ, na ọ ga-nra kwa ọnwa.
Ghọta ihe ize ndụ nke ọkụ ọkụ dị elu na iji njikwa harmonic, otu esi achọpụta ọrụ nkịtị na ndụ ọrụ nke akụrụngwa, ma melite arụmọrụ.
Nke mbu, nkowa nkenke nke nchedo gburugburu ebe obibi na ichekwa ike nke sekit oku oku di n'otu na usoro nke etiti oge igbanye oku oku:
1. N'iji ya tụnyere usoro ma ọ bụ sekit yiri ya, a na-ebelata ihe dị ugbu a nke sekit ibu ahụ site na ugboro 10 ruo ugboro 12.Ọ nwere ike ichekwa 3% nke oriri ike arụ ọrụ.
2. Usoro sekit anaghị achọ nnukwu ihe nzacha ihe nzacha, nke nwere ike ịchekwa 1% nke oriri ike.
3. Ọkụ ọ bụla induction na-agbaze ọkụ na-akwado onwe ya site na otu ndị na-atụgharị ọkụ, ọ dịghịkwa mkpa ịwụnye ọkụ ọkụ ọkụ dị ugbu a maka ịgbanwee, si otú a na-echekwa 1% nke ike oriri.
4. N'ihi na usoro inverter ike ọkọnọ, ọ dịghị ike concave akụkụ na-arụ ọrụ ike àgwà curve, ya bụ, akụkụ nke ike ọnwụ, ya mere agbaze oge na-budata belata, mmepụta na-mma, ike na-azọpụta, na nchekwa gburugburu ebe obibi na nchekwa ike bụ 7%.
Nke abụọ, ọgbọ na mmerụ nke intermediate ugboro ọkụ harmonics:
1. Parallel etiti ugboro eletriki ọkụ ọkụ ike ọkọnọ usoro bụ kasị harmonic isi iyi na ike usoro.N'ikwu okwu n'ozuzu, ọkụ ọkụ eletrik dị n'etiti 6-pulse na-emepụtakarị 6 na 7 njirimara harmonics, ebe 12-pulse inverter na-emepụta 5, 11 na 13 njirimara harmonics.Dị ka ọ na-adịkarị, a na-eji pulses 6 maka obere ihe ntụgharị na nkeji iri na abụọ na-eji maka nnukwu ihe ntụgharị.Akụkụ voltaji dị elu nke ndị na-agbanwe ọkụ ọkụ abụọ na-agbaso usoro mgbanwe nke oge dị ka njikọ delta ogologo ma ọ bụ njikọ zigzag, ma na-eji njikọ kpakpando nwere akụkụ abụọ nwere akụkụ abụọ iji mepụta ọkụ ọkụ etiti 24-pulse iji belata mmetụta nke harmonics na grid ike.
2. Igwe ọkụ induction ugboro ugboro ga-emepụta ọtụtụ harmonics n'oge a na-eji ya eme ihe, nke ga-ebute mmetọ mmetọ dị oke egwu na grid ike.Harmonics na-ebelata nnyefe na itinye n'ọrụ nke ike electromagnetic, na-eme ka ngwa eletrik na-ekpo ọkụ, na-eme ka mkpọtụ na mkpọtụ, na-eme ka oyi akwa mkpuchi, na-ebelata ndụ ọrụ, na ọbụna na-akpata ọdịda ma ọ bụ ọkụ.Harmonics ga-eme ka usoro resonance mpaghara ma ọ bụ resonance yiri ya na sistemu ọkụ eletrik, nke ga-abawanye ọdịnaya kwekọrọ ma mee ka akụrụngwa akwụ ụgwọ capacitor na akụrụngwa ndị ọzọ ọkụ.
Mgbe enweghị ike iji nkwụghachi ụgwọ ike na-emeghachi omume, ntaramahụhụ ike reactive ga-eme, na-ebute mmụba nke ụgwọ ọkụ eletrik.Pulse current nwekwara ike ịkpata mmejọ na ngwaọrụ nchebe relay na ngwaọrụ akpaka, nke nwere ike ibute mgbagwoju anya na nleta na nkwenye nke ike electromagnetic.Maka n'èzí nke usoro inye ọkụ ọkụ, pulse current ga-enwe mmetụta siri ike na ngwa nzikọrịta ozi na ngwaahịa eletrọnịkị, ya mere imeziwanye ogo ọkụ ọkụ induction ugboro ugboro aghọwo ihe kacha mkpa.
Oge nzipu: Eprel-12-2023