"ʻO ka non-linearity he mea paʻakikī ke hoʻoponopono," ʻo Arthur Mattuck, he mea makemakika ma Massachusetts Institute of Technology (MIT), i ʻōlelo mua ʻia.Akā, pono e ʻōlelo ʻia ke hoʻohana ʻia ka nonlinearity i nā haʻahaʻa uila, no ka mea, hoʻopuka ia i nā au harmonic a hoʻopilikia maikaʻi ʻole i ka hāʻawi ʻana i ka mana-a he kumu kūʻai.Ma ʻaneʻi, ʻo Marek Lukaszczyk, ʻEulopa a me Middle East Marketing Manager o WEG, kahi mea hana honua a me ka mea hoʻolako i ka ʻenehana kaʻa a me ka hoʻokele, wehewehe i ka hoʻēmi ʻana i nā harmonics i nā noi inverter.
Nā kukui uila, nā lako mana hoʻololi, nā kapuahi uila, nā mea hoʻoponopono a me nā mea hoʻololi pinepine.ʻO kēia mau mea a pau he mau hiʻohiʻona o nā mea hana me nā ukana lainaʻole,ʻo ia hoʻi, e hoʻopili ka mea i ka volta a me ka manawa ma keʻano o nā puʻupuʻu pōkole pōkole.He ʻokoʻa lākou mai nā mea hana i loaʻa nā ukana laina—e like me nā kaʻa, nā mea hoʻomehana ākea, nā mea hoʻololi i hoʻoikaika ʻia, a me nā ʻōpuʻu incandescent.No nā haawe laina, he sinusoidal ka pilina ma waena o ka volta a me nā nalu o kēia manawa, a ua like ke au i kēlā me kēia manawa me ka voli-i hōʻike ʻia e ke kānāwai Ohm.
Hoʻokahi pilikia me nā haʻawe laina ʻole a pau, ʻo ia ka hana ʻana i nā au harmonic.ʻO Harmonics nā ʻāpana alapine i ʻoi aku ka kiʻekiʻe ma mua o ke alapine kumu o ka lako mana, ma waena o 50 a i ʻole 60 Hertz (Hz), a hoʻohui ʻia i ke kumu kumu.ʻO kēia mau au hou e hoʻoneʻe i ka nalu o ka ʻōnaehana uila a hoʻemi i kona kumu mana.
Hiki i nā ʻea harmonika e kahe ana i loko o ka ʻōnaehana uila ke hana i nā hopena maikaʻi ʻole ʻē aʻe, e like me ka distortion voltage ma nā wahi pili me nā ukana ʻē aʻe, a me ka wela nui o nā kaula.I kēia mau hihia, hiki i ke ana ʻana o ka harmonic distortion (THD) ke haʻi iā mākou i ka nui o ka volta a i ʻole ka distortion o kēia manawa i hana ʻia e nā harmonics.
Ma kēia ʻatikala, e aʻo mākou pehea e hōʻemi ai i nā harmonics i nā noi inverter e pili ana i nā ʻōlelo aʻoaʻo o ka ʻoihana no ka nānā pono ʻana a me ka wehewehe ʻana i nā phenomena e kumu i nā pilikia o ka ikehu.
Hoʻohana ʻo UK i ka Engineering Recommendation (EREC) G5 o ka Energy Network Association (ENA) ma ke ʻano he hana maikaʻi no ka hoʻokele ʻana i ka distortion voltage harmonic i nā ʻōnaehana hoʻouna a me nā pūnaewele hoʻolaha.I ka European Union, loaʻa mau kēia mau ʻōlelo aʻoaʻo i nā kuhikuhi electromagnetic compatibility (EMC), kahi i loaʻa i nā kūlana like ʻole International Electrotechnical Commission (IEC), e like me IEC 60050. ʻO IEEE 519 ka maʻamau o ʻAmelika ʻĀkau, akā pono e hoʻomaopopo ʻia ʻo IEEE Hoʻopili ʻo 519 i nā ʻōnaehana hoʻolaha ma mua o nā mea hoʻokahi.
Ke hoʻoholo ʻia nā pae harmonic e ka simulation a i ʻole ke ana ʻana, nui nā ala e hōʻemi ai iā lākou e mālama iā lākou i loko o nā palena kūpono.Akā he aha ka palena ʻae ʻia?
No ka mea ʻaʻole hiki ke hoʻokele waiwai a hiki ʻole ke hoʻopau i nā harmonics āpau, aia ʻelua mau kūlana honua EMC e kaupalena ana i ka distortion o ka mana lako uila ma ke kuhikuhi ʻana i ka waiwai nui o ka harmonic current.ʻO lākou ka maʻamau IEC 61000-3-2, kūpono no nā mea hana me ka helu helu ʻana a hiki i 16 A (A) a me ≤ 75 A i kēlā me kēia pae, a me ka maʻamau IEC 61000-3-12, kūpono no nā mea hana ma luna o 16 A.
ʻO ka palena o nā harmonic voltage e mālama i ka THD (V) o ke kiko o ka hoʻohui maʻamau (PCC) ma ≤ 5%.ʻO ka PCC kahi i hoʻopili ʻia ai nā mea hoʻokele uila o ka ʻōnaehana hoʻoili mana i nā mea kūʻai aku a me kekahi hoʻoili mana ma waena o ka mea kūʻai aku a me ka ʻōnaehana hoʻoili mana.
Ua hoʻohana ʻia kahi manaʻo o ≤ 5% ʻo ia wale nō ke koi no nā noi he nui.ʻO kēia ke kumu i nā hihia he nui, ʻo ka hoʻohana wale ʻana i kahi inverter me kahi rectifier 6-pulse a me ka reactance hoʻokomo a i ʻole ka hoʻopili pololei (DC) link inductor ua lawa ia e hoʻokō i ka ʻōlelo aʻoaʻo distortion kiʻekiʻe.ʻOiaʻiʻo, ke hoʻohālikelike ʻia me kahi inverter 6-pulse me ka ʻole o ka inductor i ka loulou, me ka hoʻohana ʻana i ka inverter me kahi DC link inductor (e like me kā WEG pono'ī CFW11, CFW700, a me CFW500) hiki ke hōʻemi nui i ka radiation harmonic.
A i ʻole, aia kekahi mau koho ʻē aʻe no ka hōʻemi ʻana i nā harmonic system i nā noi inverter, a mākou e hoʻolauna ai ma aneʻi.
ʻO kahi hoʻonā e hōʻemi i ka harmonics ʻo ia ka hoʻohana ʻana i kahi inverter me kahi rectifier 12-pulse.Eia naʻe, hoʻohana wale ʻia kēia ʻano hana ke hoʻokomo ʻia kahi transformer;no nā mea hoʻohuli he nui i pili i ka loulou DC like;a i ʻole inā pono kahi hoʻokomo hou i kahi transformer i hoʻolaʻa ʻia i ka inverter.Eia hou, ua kūpono kēia hopena no ka mana i ʻoi aku ma mua o 500 kilowatts (kW).
ʻO kekahi ala ʻē aʻe ʻo ka hoʻohana ʻana i kahi 6-pulse active current (AC) drive inverter me kahi kānana passive ma ka hoʻokomo.Hiki i kēia ʻano hana ke hoʻonohonoho i nā pae uila like ʻole - nā volta harmonika ma waena o ka waena (MV), ka uila kiʻekiʻe (HV) a me ka uila kiʻekiʻe kiʻekiʻe (EHV) - a kākoʻo i ka hoʻohālikelike ʻana a hoʻopau i nā hopena ʻino i nā mea pili i nā mea kūʻai aku.ʻOiai he hopena kuʻuna kēia e hōʻemi i ka harmonics, e hoʻonui i ka nalowale o ka wela a hoʻemi i ka mea mana.
Lawe kēia iā mākou i kahi ala ʻoi aku ka maikaʻi e hōʻemi ai i nā harmonics: hoʻohana i ka mea hoʻohuli me ka rectifier 18-pulse, a i ʻole kahi kaʻa DC-AC i hoʻoikaika ʻia e kahi loulou DC ma o ka rectifier 18-pulse a me kahi mea hoʻololi hoʻololi.ʻO ka hoʻoponopono pulse ka hopena like inā he 12-pulse a i ʻole 18-pulse.ʻOiai he hopena kuʻuna kēia e hōʻemi i nā harmonics, ma muli o kona kumukūʻai kiʻekiʻe, hoʻohana maʻamau ia i ka wā i hoʻokomo ʻia ai kahi transformer a i ʻole kahi transformer kūikawā no ka inverter e koi ʻia no kahi hoʻonohonoho hou.ʻOi aku ka mana ma mua o 500 kW.
Hoʻonui kekahi mau ʻano hana hoʻopaʻa ʻana i ka wela a hōʻemi i ka mana, aʻo nā ala ʻē aʻe hiki ke hoʻomaikaʻi i ka hana ʻōnaehana.ʻO kahi hopena maikaʻi a mākou e manaʻo ai ʻo ia ka hoʻohana ʻana i nā kānana ikaika WEG me nā pahu 6-pulse AC.He hopena maikaʻi loa kēia e hoʻopau i nā harmonics i hana ʻia e nā mea like ʻole
ʻO ka hope, ke hiki ke hoʻihoʻi hou ʻia ka mana i ka mānoanoa, a i ʻole ke alakaʻi ʻia nā kaʻa he nui e kahi loulou DC hoʻokahi, ʻoi aku ka maikaʻi o kekahi hopena.ʻO ia hoʻi, hoʻohana ʻia kahi hoʻokele hoʻōla hou (AFE) a me ka kānana LCL.I kēia hihia, loaʻa i ka mea hoʻokele ka mea hoʻoponopono ikaika ma ka hoʻokomo a hoʻokō i nā palena i ʻōlelo ʻia.
No nā mea hoʻohuli ʻole me kahi loulou DC-e like me kā WEG ponoʻī CFW500, CFW300, CFW100 a me MW500 inverters-ʻo ke kī i ka hōʻemi ʻana i nā harmonics ʻo ka reactance pūnaewele.ʻAʻole wale kēia e hoʻoponopono i ka pilikia harmonic, akā hoʻopau pū i ka pilikia o ka ikehu i mālama ʻia i ka ʻāpana reactive o ka inverter a lilo i mea ʻole.Me ke kōkua o ka reactance pūnaewele, hiki ke hoʻohana ʻia kahi inverter kiʻekiʻe-nui i hoʻouka ʻia e kahi pūnaewele resonant e ʻike i ka reactance controllable.ʻO ka pōmaikaʻi o kēia ʻano hana ʻo ia ka haʻahaʻa o ka ikehu i mālama ʻia i loko o ka mea reactance a haʻahaʻa ka distortion harmonic.
Aia nā ʻano hana ʻē aʻe e pili ana i nā harmonics.ʻO kekahi e hoʻonui i ka nui o nā ukana laina e pili ana i nā ukana laina ʻole.ʻO kekahi ala ʻē aʻe ʻo ka hoʻokaʻawale ʻana i nā ʻōnaehana hoʻolako mana no nā ukana laina a me ka laina ʻole i loaʻa nā palena ʻokoʻa THD ma waena o 5% a me 10%.Hoʻopili kēia ʻano hana me nā ʻōlelo aʻoaʻo ʻenekinia i ʻōlelo ʻia ma luna (EREC) G5 a me EREC G97, i hoʻohana ʻia e loiloi i ka distortion voltage harmonic o nā mea kanu a me nā mea kanu nonlinear a resonant.
ʻO kekahi ala ʻē aʻe ʻo ka hoʻohana ʻana i kahi rectifier me ka nui o nā pulses a hānai iā ia i kahi transformer me nā pae lua.Hiki ke hoʻohui ʻia nā mea hoʻololi multi-winding me ka nui a i ʻole nā ​​wili lua i kekahi i kekahi i kahi ʻano hoʻonohonoho kūikawā e hāʻawi i ka pae voli i makemake ʻia a i ʻole e hoʻokau i nā ukana he nui i ka hoʻopuka, a laila e hāʻawi i nā koho hou aʻe i ka hāʻawi ʻana i ka mana A me ka ʻōnaehana hoʻololi.
ʻO ka hope, aia ka hana hoʻokele hou o ka AFE i ʻōlelo ʻia ma luna.ʻAʻole hiki ke hoʻololi hou ʻia nā drive AC kumu, ʻo ia hoʻi ʻaʻole hiki iā lākou ke hoʻihoʻi i ka ikehu i ke kumu mana - ʻaʻole lawa kēia, no ka mea ma kekahi mau noi, ʻo ka hoʻihoʻi ʻana i ka ikehu i hoʻihoʻi ʻia he koi kikoʻī.Inā pono e hoʻihoʻi ʻia ka ikehu regenerative i ke kumu mana AC, ʻo ia ke kuleana o ka hoʻokele regenerative.Hoʻololi ʻia nā mea hoʻoponopono maʻalahi e nā inverters AFE, a hiki ke hoʻihoʻi ʻia ka ikehu ma kēia ala.
Hāʻawi kēia mau ʻano i nā koho like ʻole e hakakā i nā harmonics a kūpono i nā ʻano ʻano ʻōnaehana hoʻoili mana.Akā hiki iā lākou ke mālama i ka ikehu a me ke kumukūʻai nui i nā noi like ʻole a hoʻokō i nā kūlana honua.Hōʻike kēia mau hiʻohiʻona i ka wā e hoʻohana ʻia ai ka ʻenehana inverter pololei, ʻaʻole paʻakikī ka pilikia non-linearity.
For more information, please contact: WEG (UK) LtdBroad Ground RoadLakesideRedditch WorcestershireB98 8YPT Tel: +44 (0)1527 513800 Email: info-uk@weg.net Website: https://www.weg.net
ʻO ke kaʻina hana a me ka hoʻomalu ʻAʻole kuleana o kēia lā no ka ʻike o nā ʻatikala a me nā kiʻi i waiho ʻia a i waho paha.Kaomi ma aneʻi e hoʻouna mai iā mākou i leka uila e hōʻike ana iā mākou i nā hewa a i ʻole nā ​​​​hana i loko o kēia ʻatikala.