The inverter bụ ngwaọrụ mgbanwe ike mejupụtara ngwaọrụ semiconductor, nke a na-ejikarị eme ka ike DC ghọọ ike AC.Ọ na-emekarị mejupụtara a boost circuit na ihe inverter àkwà mmiri sekit.Mgbali elu sekit na-akwalite voltaji DC nke cell anyanwụ na voltaji DC achọrọ maka njikwa mmepụta inverter;sekit inverter àkwà mmiri na-atụgharị voltaji DC agbagoro ka ọ bụrụ voltaji AC yana ugboro ugboro.
Inverter, nke a makwaara dị ka onye na-ahụ maka ọkụ eletrik, nwere ike kewaa n'ime ọkụ eletrik nke onwe ya na ijikọ grid dịka ojiji nke inverter na usoro mmepụta ọkụ fotovoltaic.Dị ka usoro mgbanwe mgbanwe nke waveform si dị, enwere ike kewaa ya ka ọ bụrụ onye ntụgharị ihu square, step wave inverter, inverter sine wave, na ngwakọta inverter ụzọ atọ.N'ihi na inverters eji na grid-jikọrọ usoro, ha nwere ike ikewa n'ime transformer-ụdị inverters na transformer-erughị inverters dị ka ma e nwere a transformer.Ihe ndị bụ isi teknụzụ nke inverter fotovoltaic anyanwụ bụ:
1. voltaji mmepụta ego
Onye ntụgharị fotovoltaic kwesịrị inwe ike ịwepụta uru voltaji enyere n'ime oke mgbanwe mgbanwe nke voltaji DC akọwapụtara akọwapụtara.N'ozuzu, mgbe voltaji mmepụta gosiri bụ otu-phase 220v na atọ-phase 380v, voltaji fluctuation deviation ka akọwapụtara dị ka ndị a.
(1) Mgbe ị na-agba ọsọ na ọnọdụ kwụ ọtọ, a na-achọkarị ka mgbanwe mgbanwe voltaji agaghị agafe ± 5% nke uru echere.
(2) Mgbe ibu na-agbanwe na mberede, ntụgharị voltaji anaghị agafe ± 10% nke ọnụ ahịa egosiri.
(3) N'okpuru ọnọdụ ọrụ nkịtị, enweghị nha nke mmepụta voltaji nke atọ site na inverter ekwesịghị gafere 8%.
(4) Ntugharị nke voltaji waveform (sine wave) nke mmepụta usoro atọ a na-achọkarị ka ọ ghara ịgafe 5%, na mmepụta otu ugboro ekwesịghị ịfe 10%.
(5) Ngbanwe nke ugboro nke inverter mmepụta AC voltaji kwesịrị ịdị n'ime 1% n'okpuru ọnọdụ ọrụ nkịtị.Ugboro voltaji mmepụta akọwapụtara na ọkọlọtọ mba Gb/t 19064-2003 kwesịrị ịdị n'etiti 49 na 51hz.
2. Ibu ike ihe
Ogo nke ihe ike ibu na-egosi ike nke inverter na-ebu ibu inductive ma ọ bụ capacitive ibu.N'okpuru ọnọdụ nke ebili mmiri sine, ihe na-akpata ike ibu bụ 0.7 ruo 0.9, na ọnụahịa a kwadoro bụ 0.9.N'ihe banyere ụfọdụ ike ibu, ma ọ bụrụ na ihe ike nke inverter dị ala, ikike achọrọ nke onye ntụgharị ahụ ga-abawanye, na-ebute mmụba nke ọnụ ahịa.N'otu oge ahụ, ike pụtara ìhè nke AC sekit nke fotovoltaic usoro na-abawanye, na sekit ugbu a na-abawanye.Ọ bụrụ na ọ buru ibu, ọnwụ ahụ ga-abawanye ụba, arụmọrụ usoro ahụ ga-ebelatakwa.
3. A na-edepụta mmepụta ugbu a na ikike mmepụta ihe
Ọnụego mmepụta ugbu a na-ezo aka n'ụdị mmepụta ihe dị ugbu a nke inverter n'ime oke ihe ike ibu a kapịrị ọnụ, unit bụ a;ogo mmepụta ikike na-ezo aka na ngwaahịa nke voltaji mmepụta nke e depụtara na ọkwa mmepụta ugbu a nke inverter mgbe ihe nrụpụta ike bụ 1 (ya bụ ibu resistive dị ọcha), unit bụ kva ma ọ bụ kw.
Oge nzipu: Jul-15-2022