Nnyocha Harmonic na Sistemụ Ike
Okwu Mmalite
N'ụwa nke injinịa eletriki, ọkachasị n'akụkụ sistemụ ike, nyocha harmonic na-arụ ọrụ dị oke mkpa n'ịhụ na enyere ike eletrik n'ụzọ a pụrụ ịdabere na ya na nke ọma. Ka sistemụ ike ọgbara ọhụrụ na-aghọwanye mgbagwoju anya ma na-agụnye ụdị ngwaọrụ eletrọnịkị dị iche iche, ọmụmụ nke harmonic na mmetụta ha na sistemụ ndị a aghọwo ihe dị mkpa. Isiokwu a na-enyocha echiche nke nyocha harmonic na sistemụ ike, mkpa ya, usoro eji eme ihe, na ụzọ isi belata mgbagwoju anya harmonic.
Ịghọta Harmonics
Harmonics bụ voltaji ma ọ bụ ebili mmiri ugbu a nke na-arụ ọrụ na ugboro ole bụ ọnụọgụgụ integer nke ugboro ole bụ isi. N'ọtụtụ sistemụ ike, ugboro ole bụ isi bụ 50 Hz ma ọ bụ 60 Hz, dabere na mpaghara ahụ. Mgbe ugboro ole nke ebili mmiri si na ugboro ole a dị mkpa pụta, ọ na-emepụta ihe ndị a na-eme ka ha dị mma. Enwere ike kewaa ihe ndị a dị ka:
1. Njikọta Dị Iche Iche: Ndị a bụ njikọta dị iche iche nke na-eme na ọnụọgụgụ dị iche iche nke ugboro ole bụ isi (dịka ọmụmaatụ, njikọta nke atọ, nke ise, nke asaa).
2. Ọbụna Harmonics: Harmonics ndị a na-eme ọbụna n'ọtụtụ ugboro nke isi (dịka ọmụmaatụ, harmonics nke abụọ, nke anọ, nke isii).
3. Interharmonics: Ugboro ndị na-abụghị ọnụọgụgụ integer nke ugboro ole bụ isi.
Isi mmalite nke Harmonics
A na-emepụta Harmonics site na ibu ndị na-abụghị ahịrị nke na-adọta ọkụ eletrik n'ụzọ na-abụghị sinusoidal. Isi mmalite harmonics kachasị na sistemụ ike gụnyere:
1. Ngwaọrụ Elektrọniki Ike: Ndị na-agbanwe ihe, ndị na-agbanwe ihe, na ndị na-agbanwe ugboro ugboro (VFDs) eji eme ihe n'ụlọ ọrụ mmepụta ihe nwere ike ịkpata nnukwu mgbanwe na-adakọ.
2. Ọkụ: Ọkụ ọkụ na-enwu enwu na ọkụ LED ọgbara ọhụrụ nwere ballasts eletrọniki nwere ike itinye aka na harmonic currents.
3. Ngwaọrụ Kọmputa: Kọmputa, igwe nbipute, na ngwa ọrụ ọfịs ndị ọzọ na-ejikarị ihe ndị nwere ike ịgbanwe ọkụ eletrik nke nwere ike imepụta harmonics.
4. Usoro Ụlọ Ọrụ: Ngwaọrụ dịka ihe eji eme ka ọkụ dị n'akụkụ, igwe ịgbado ọkụ, na moto eletriki nwekwara ike ịbụ isi iyi dị mkpa nke mmepụta harmonic.
Mmetụta nke Harmonics na Sistemụ Ike
Harmonics nwere ike inwe ọtụtụ mmetụta ọjọọ na sistemụ ike, nke gụnyere mana ejedebeghị na:
1. Mfu Karịrị Elu: Harmonics nwere ike ibute ọkụ ọzọ na transformers, moto, na waya, na-ebute mmụba nke mfu ọrụ na mbelata ndụ akụrụngwa.
2. Mgbanwe Voltaji: Oke ọkụ harmonic nwere ike imebi voltaji ọkọnọ ahụ, na-emetụta arụmọrụ na ntụkwasị obi nke akụrụngwa dị nro.
3. Resonance: Harmonics nwere ike ibute ọnọdụ resonance na netwọk sistemụ ike, na-eme ka voltaji ma ọ bụ ọkụ eletrik dịkwuo elu ma na-akpata mmebi akụrụngwa.
4. Nsogbu Ngwaọrụ Nchedo: Harmonics nwere ike ibute nsogbu na ngwaọrụ nchekwa dịka ihe mgbawa sekit na relay, na-emebi nchekwa na ntụkwasị obi nke sistemụ ike.
Usoro Nyocha Harmonic
Ịtụle harmonics na sistemụ ike gụnyere ịtụ na inyocha ọdịnaya harmonic nke voltaji na ụdị waveforms ugbu a. E ji ọtụtụ usoro na ngwaọrụ eme ihe maka nyocha harmonic:
1. Mgbanwe Fourier: Usoro mgbakọ na mwepụ a na-agbaze ụdị ebili mmiri nke mpaghara oge n'ime ihe mejupụtara ugboro ole ya. Mgbanwe Fourier Fast (FFT) bara uru nke ukwuu maka nyocha oge.
2. Ihe Nyocha Ogo Ike: A na-eji ngwaọrụ ndị a atụ paramita ogo ike dị iche iche, gụnyere mgbanwe harmonic, ma nye nlekota oge.
3. Ihe Nyocha Harmonic: Ngwaọrụ pụrụ iche e mere iji mee nyocha harmonic zuru ezu site n'ịnakọta voltaji na ụdị waveforms dị ugbu a na ịgbakọ spectra harmonic.
4. Ngwanrọ Nlereanya: Ngwaọrụ dịka MATLAB/Simulink na ETAP (Mmemme Nyocha Eletriki Transient) na-enye ohere maka ịme ihe nlereanya na ịme ihe nlereanya nke sistemụ ike iji buru amụma mgbanwe harmonic.
Mbelata nke Harmonics
Ibelata mmetụta ọjọọ nke harmonics gụnyere ọtụtụ atụmatụ iji gbochie isi mmalite harmonic na ichebe akụrụngwa dị nro. Usoro mgbochi ndị a na-ejikarị eme ihe bụ:
1. Nzacha Na-adịghị Mma: Ndị a bụ sekit LC (inductor-capacitor) nke e mere ka ha na-ada ụda n'oge ụfọdụ, si otú a na-ewepụ harmonics ndị a na-achọghị na sistemụ ike.
2. Ihe nzacha na-arụ ọrụ: Ihe nzacha harmonic na-arụ ọrụ na-etinye mmiri ọkụ na-akwụghachi ụgwọ iji lụso harmonic ndị ibu na-abụghị nke ahịrị na-emepụta ọgụ.
3. Nhazi Harmonic: Nhazigharị sistemụ ike iji dozie ibu nke usoro nwere ike inyere aka belata mgbagwoju anya harmonic.
4. Transformers nkewapụ iche: Iji transformers nke a haziri nke ọma nwere ike inyere aka kewapụ akụrụngwa dị nro site na ngalaba harmonic nke sistemụ ike.
5. Ụkpụrụ Ogo na Nrubeisi: Ịgbaso ụkpụrụ ogo ike e guzobere dịka IEEE 519 na-enyere aka hụ na mgbanwe harmonic ka dị n'ime oke a na-anabata.
mmechi
Nnyocha Harmonic na sistemụ ike dị oke mkpa iji nọgide na-enwe arụmọrụ, ntụkwasị obi, na nchekwa nke netwọk eletriki. Site na njikọta na-abawanye nke ngwaọrụ eletrọniki ike na ibu ndị na-abụghị ahịrị, enweghị ike ileghara mmetụta nke harmonic anya. Ịghọta isi mmalite, mmetụta, na usoro mgbochi nke harmonic na-enye ndị injinia na ndị ọrụ aka ịhazi ma rụọ ọrụ sistemụ ike nke na-emezu ụkpụrụ dị elu nke arụmọrụ na ịdị mma ike. Ka ngalaba injinia eletriki na-agbanwe agbanwe, ọganihu na-aga n'ihu na usoro na ngwaọrụ nyocha harmonic ga-adị oke mkpa n'ịgwọ ihe ịma aka ndị na-aga n'ihu nke mgbagwoju anya harmonic na sistemụ ike nke oge a na-eweta.
