Usoro ọkụ ọkụ nke ụlọ ọgwụ bụ nke usoro ọha na eze, nke bụ ikike inye ikike nke mpaghara niile.Nhazi ụlọ ụlọ ọgwụ na-ejikarị ụdị nke etiti etiti, na ibu ọkụ eletrik bụ nke otu klas nke ibu.Ụdị ọkụ eletrik ya bụ isi gụnyere: usoro ọkụ, ikuku oyi, usoro ike ahụike, ọkụ ọkụ mberede.
Usoro ọkụ na ikuku oyi bụ isi ike dị iche iche dị iche iche nke oriri ọkụ eletrik ụlọ ọgwụ, nke ga-emepụta nzaghachi kwekọrọ ekwekọ na grid ụlọ ọgwụ n'oge eji.N'ihi ojiji nke ọhụrụ ụdị ọkụ eletrik dị ka X-ray igwe, magnetik resonance igwe MRI, CT igwe, wdg, ojiji nke ịmafe ike ọkọnọ, uninterruptible UPS na ndị ọzọ a nnukwu ọnụ ọgụgụ nke nononlinear ibu, na-arụpụtakwa kwekọrọ ekwekọ nzaghachi ka. grid ike.
Ụlọ ọgwụ ahụ nwere oke ọkụ eletrik dị elu, na ngwá ọrụ usoro dị mma ma bụrụ nke a pụrụ ịdabere na ya dị ka isi ihe.N'ihi nnukwu ojiji nke ibu na-adịghị n'ịntanetị, njirimara harmonics nke 3rd, 5th na 7th ka a na-emepụta na netwọk ike ụlọ ọgwụ.Harmonics na-emetụta kpọmkwem ọrụ kwụsiri ike nke akụrụngwa ahụike ziri ezi, yana mkpokọta 3 harmonics na ahịrị na-anọpụ iche na-akpata okpomọkụ dị n'etiti ahịrị, nke na-etinye ọrụ nchekwa nke okporo ike ụlọ ọgwụ n'ihe egwu.
2. Nkọwa na ọgbọ nke harmonics
Nkọwa nke harmonics: usoro nke Fourier decomposition of the periodical nononlinear sinusoidal quantity, na mgbakwunye na inweta otu akụrụngwa dị ka isi ugboro nke grid ike, ma a usoro nke components ukwuu karịa integral multiple nke isi ugboro nke ike. grid, akụkụ a nke ọkụ eletrik a na-akpọ harmonics.
Ọgbọ nke harmonics: Mgbe ihe dị ugbu a na-agafe na ibu ahụ, enwere mmekọrịta na-enweghị isi na voltaji ibu, bụ nke na-emepụta ihe na-abụghị sinusoidal ugbu a, na-akpata harmonics.
3. Mmebi nke harmonics
1) Harmonics na-eduga na ọdịda ike na-ekwesịghị ekwesị yana ihe mberede nkwụsị akụrụngwa kpatara site na arụghị ọrụ ma ọ bụ ịjụ nchedo na ngwaọrụ akpaka, na-ebute nnukwu mfu ndị ọzọ.
2) Mmụba nke ugboro nke harmonic ugbu a na-akpata mmetụta akpụkpọ ahụ doro anya, nke na-eme ka iguzogide wires nke eriri ike na ahịrị nkesa, na-abawanye nkwụsị nke eriri, na-abawanye okpomọkụ, na-aka nká na mkpuchi, na-ebelata ndụ, na-akpata mmebi, ma na-enwekarị mmejọ sekit dị mkpụmkpụ, na-eme ihe egwu ọkụ.
3) Inweta ike grid resonance, na-eduga na harmonic voltaji na overcurrent, na-akpata oké ihe mberede, mebie capacitor ụgwọ na ndị ọzọ eletriki akụrụngwa.
4) Harmonics na-emetụta ọrụ nkịtị nke ngwa eletrik dị iche iche.Ọ na-eduga na mfu ndị ọzọ na ikpo ọkụ nke moto asynchronous na transformers, na-esochi mkpọtụ igwe, mkpọtụ na oke voltaji, na-ebelata arụmọrụ na itinye n'ọrụ, na ibelata ndụ ọrụ.
5) Ntinye aka na nzikọrịta ozi dị n'akụkụ, ngwa eletrọnịkị ma ọ bụ ngwa njikwa akpaaka, ma ọ bụ mee ka ọ ghara ịrụ ọrụ nke ọma.
4. Atụmatụ nzacha
Shaanxi Central Hospital bụ ụlọ ọgwụ klaasị nke abụọ nke mba nwere akụrụngwa ahụike dị elu yana gburugburu ụlọ ọgwụ mara mma.Ndị ọrụ ọkachamara na ndị ọrụ aka anyị nyere ụlọ ọgwụ n'aka n'oge mmalite ka ha tụọ ike nke ọkụ eletrik dị ala nke ụlọ ọgwụ.Mkpokọta agbagọ ọnụego nke ugbu a na ụlọ ọgwụ ike okporo bụ 10%, tumadi kesara na e ji mara harmonics nke 3rd, 5th na 7th iji.Dabere na nsonaazụ nnwale ahụ, ụlọ ọrụ anyị haziri otu ikike nke ngwaọrụ nzacha na-arụ ọrụ 400A maka ụlọ ọgwụ, etinyere n'akụkụ akụkụ mgbanaka dị ala, ojiji nke ọgwụgwọ etiti maka njikwa kwekọrọ.
5 Filter na-arụ ọrụ (/ 690v-active-power-filter-product/)
5.1 Ngwaahịa Okwu
Active Power filter (/noker-3-phase-34-wire-active-power-filter-apf-ahf-for-dynamic-harmonics-compensation-product/) bụ ụdị ngwaọrụ eletrọnịkị ike ọhụrụ eji eme ka ike gwụ harmonics na kwụghachi ike reactive, nke nwere ike ịkwụ ụgwọ maka harmonics na reactive ike mgbanwe nha na ugboro.
5.2 Ụkpụrụ ọrụ
A na-achọpụta ihe dị ugbu a n'oge dị ugbu a site na CT dị n'èzí, a na-agbakọkwa uru nke harmonic site n'ime DSP.Site na mgbama PWM na-ezigara IGBT, onye ntụgharị ahụ na-emepụta ugbu a harmonic nha nha nha nha nha nha yana n'akụkụ nke ọzọ n'ime grid ike iji mebie nkwekọrịta ahụ wee mezuo ebumnuche nke ime ka grid ike dị ọcha.
6 .Nleba anya na nyocha nke data njikwa harmonics na ụlọ ọgwụ
Ụlọ ọrụ APF
A na-enyocha data nke APF (/ harmonics-compensation-200400v-active-harmonic-filter-ahf-module-triple-phase-product/) nkwụghachi ụgwọ n'ụlọ ọgwụ site n'aka onye nyocha ogo ogo CA8336 nke France, yana data ịdị mma ike. A nwalere n'otu n'otu n'okpuru ọnọdụ abụọ nke ọrụ APF (mgbe akwụ ụgwọ) na nkwụsị (na-enweghị ụgwọ ọrụ), a chịkọtara data ahụ ma nyochaa ya.
6.1 Ntụnye na nyocha nke APFs(/3-phase-3-wire-active-power-filter-400v-75a-apf-panel-product/) ntinye na mwepụ data
1: Uru dị irè nke ịgba ọsọ ugbu a
2: THDi tupu ejikọrọ nzacha ọrụ
3: THDi mgbe ejikọrọ nzacha ọrụ
4: THDi site na 1st ruo 5th tupu ejikọrọ ọrụ ọrụ
5: THDi site na 1st ruo 5th mgbe ejikọtara nzacha ọrụ
6: THDi site na 1st ruo 7th tupu ejikọrọ ọrụ ọrụ
7: THDi site na 1st ruo 7th mgbe ejikọtara nzacha ọrụ
Nsonaazụ:
| APF | THDi (mkpokọta) | THDi (5th) | THDi (7th) |
| Tupu APF jikọọ | 10% | 9% | 3.3% |
| Mgbe APF jikọọ | 3% | 3% | 0.5% |
Dị ka egosiri na ọnụ ọgụgụ dị n'elu, a na-atụle njikwa harmonic nke ụlọ ọgwụ site na AHF (/ low-voltage-active-power-filter-reduce-the-harmonic-current-active-harmonic-filter-ahf-product/) ọkachamara ike ogo analyzer CA8336 nke France.Ntụnyere data tupu na mgbe APF nwalere n'otu n'otu.Mgbe ijiri APF anyị maka njikwa nkwekọ, ngụkọta mgbagha ugbu a (THDi) nke netwọk ike ụlọ ọgwụ na-ebelata site na 10% gaa na 3%, mmetụta ya dịkwa oke mkpa.
7. Nchịkọta
Usoro inye ọkụ ụlọ ọgwụ dị oke mkpa.Iwebata ngwa eletriki ọhụrụ emeela ka ahụike na ịdị mma nke ụlọ ọgwụ dịkwuo mma, ma nyekwa ọtụtụ ndị ọrịa ohere ọgwụgwọ dị mma.Ma ibu ike ọhụrụ ahụ na-ewetakwa mmetọ kwekọrọ.Ịdị adị nke harmonics na-emerụ ọrụ nkịtị nke okporo ike ụlọ ọgwụ ma na-emetụta nkwụsi ike nke ngwa ọgwụgwọ ziri ezi.Dị ka akụkụ nke usoro grid ike ọha na eze, harmonics na-abawanye oriri ọkụ eletrik n'ụlọ ọgwụ, nke megidere okwu mba nke ịkwalite nchekwa nchekwa ike.
Mgbe emechara ihe nzacha anyị na-arụ ọrụ, ọ na-eme ka grid ike ụlọ ọgwụ dịkwuo mma, na-ewepụ ihe egwu nchekwa, na-eme ka ike eletrik dị ọcha ma dị ọcha maka akụrụngwa ahụike, yana n'otu oge na-eburu n'uche ịchekwa ike na mbelata oriri.
Oge nzipu: Ọktoba 16-2023