1. Lebaka
Hobaneng ha inverter e etsahala overvoltage tripping kapa phokotso ea matla e etsahala?
E ka ba le leng la mabaka a latelang:
1)Sebaka sa heno sa marang-rang se se se ntse se sebetsa ka ntle ho meeli e tloaelehileng ea motlakase ea lehae (kapa litlhophiso tse fosahetseng tsa melaoana).Ka mohlala, Australia, AS 60038 e hlalosa li-volts tse 230 e le motlakase oa marang-rang o nang le a.+ 10%, -6% mefuta e fapaneng, kahoo moeli o ka holimo oa 253V.Haeba ho le joalo, khamphani ea sebakeng sa heno ea Grid e na le tlamo ea molao ea ho lokisa motlakase.Hangata ka ho fetola transformer ea lehae.
2)Gridi ea sebaka sa heno e ka tlase ho moeli mme sistimi ea hau ea lipolanete, leha e kentsoe ka nepo le ho latela litekanyetso tsohle, e sutumelletsa gridi ea lehae ho feta moeli oa ho khoptjoa.Li-terminals tsa hau tsa motlakase oa letsatsi li hokahantsoe le 'Khokahano ea Khokahano' ka grid ka thapo.Cable ena e na le khanyetso ea motlakase e etsang hore ho be le voltage ho thapo neng kapa neng ha inverter e romela matla ka ho romela motlakase ho grid.Sena re se bitsa 'voltage rise'.Ha letsatsi la hau le romella kantle ho naha haholo, matla a motlakase a eketseha haholo ka lebaka la Molao oa Ohm (V=IR), 'me ha khanyetso ea cabling e phahama, matla a motlakase a phahama le ho feta.
Ka mohlala, Australia, Australian Standard 4777.1 e re palo e phahameng ea matla a ho phahama ha motlakase oa letsatsi e tlameha ho ba 2% (4.6V).
Kahoo o kanna oa ba le sets'oants'o se lumellanang le maemo ana, 'me se na le phallo ea motlakase ea 4V ho thomello e felletseng.Keriti ea hau ea lehae le eona e kanna ea kopana le maemo mme ea ba 252V.
Ka letsatsi le letle la letsatsi ha ho se motho lapeng, sistimi e romella hoo e batlang e le ntho e ngoe le e ngoe ho grid.Matla a phahamisoa ho fihla ho 252V + 4V = 256V ka metsotso e fetang 10 mme inverter e tsamaea.
3)Ho phahama ho hoholo ha motlakase pakeng tsa inverter ea hau ea letsatsi le grid ho ka holimo ho t 2% boholo ho Standard,hobane khanyetso ea thapo (ho kenyeletsoa likhokahano leha e le life) e phahame haholo.Haeba ho le joalo, sehlomathisi se ka be se u eletse hore AC cabling ea hau ho grid e hloka ntlafatso pele letsatsi le ka kenngoa.
4) Taba ea lisebelisoa tsa inverter.
Haeba motlakase o lekantsoeng oa Grid o lula o le ka har'a marang-rang, empa inverter e lula e na le phoso ea overvoltage tripping ho sa tsotelehe hore na mofuta oa motlakase o pharalletseng hakae, e lokela ho ba taba ea lisebelisoa tsa inverter, e kanna ea ba hore li-IGBT li senyehile.
2. Tlhahlobo
Lekola Voltage ea Grid ea Hau Ho leka voltage ea gridi ea lehae, e tlameha ho lekanyetsoa ha sesebelisoa sa hau sa letsatsi se tima.Ho seng joalo, motlakase oo u o lekanyang o tla angoa ke sistimi ea hau ea lipolanete, 'me u ke ke ua beha molato holim'a marang-rang!U hloka ho paka hore motlakase oa grid o phahame ntle le hore sistimi ea hau ea letsatsi e sebetse.U lokela hape ho tima mejaro eohle e meholo ka tlung ea hau.
E boetse e lokela ho lekanyetsoa ka letsatsi le chabileng ho pota mots'ehare - kaha sena se tla ela hloko ho phahama ha motlakase ho bakoang ke lisebelisoa tse ling tsa letsatsi tse u potolohileng.
Ntlha ea pele - rekota ho bala hang-hang ka multimeter.Sparky ea hau e lokela ho bala matla a motlakase hang hang ho switchboard e kholo.Haeba motlakase o le moholo ho feta motlakase o lekanyelitsoeng, joale nka senepe sa multimeter (haholo-holo u sebelisa sesebelisoa se seholo sa phepelo ea letsatsi sebakeng se timang setšoantšong se le seng) 'me u se romelle lefapheng la boleng ba matla ba k'hamphani ea Grid ea hau.
Ea bobeli - rekota karolelano ea metsotso ea 10 ka mochine oa motlakase.Sparky ea hau e hloka "voltage logger" (e leng Fluke VR1710) 'me e lokela ho lekanya litlhōrō tse mahareng tsa metsotso e 10 ha meroalo e meholo ea letsatsi e tingoe.Haeba karolelano e ka holim'a motlakase o fokolang, joale romela lintlha tse rekotiloeng le setšoantšo sa setupo sa tekanyo - hape ka ho khetheha e bonts'a sesebelisoa se seholo sa phepelo ea letsatsi se tima.
Haeba e 'ngoe ea liteko tse 2 tse ka holimo e le 'positive' joale hatella khamphani ea Grid ea hau ho lokisa maemo a sebaka sa hau sa motlakase.
Netefatsa ho theoha ha voltage ha u instola
Haeba lipalo li bonts'a ho phahama ha motlakase ho feta 2% joale o tla hloka ho ntlafatsa AC cabling ho tloha ho inverter ea hau ho ea ho grid Connection Point e le hore lithapo li be mafura (lithapo tse mafura = ho hanyetsa ho tlase).
Mohato oa ho qetela - lekanya ho phahama ha motlakase
1. Haeba grid voltage ea hau e lokile 'me lipalo tsa ho phahama ha voltage li le ka tlase ho 2%, sparky ea hau e hloka ho lekanya bothata ho netefatsa lipalo tsa ho phahama ha motlakase:
2. Ha PV e koetsoe, 'me li-circuits tse ling kaofela li tima, lekanya motlakase oa phepelo e se nang moroalo ho switch e kholo.
3. Kenya mochine o le mong o tsejoang oa ho hanyetsa, mohlala, heater kapa ontong/hotplates 'me u lekanye mothapo oa hona joale oa lisebelisoa, ho se nke lehlakore le lefats'e le motlakase oa phepelo ea mojaro ho main switch.
4. Ho tloha ho sena o ka bala ho theoha ha motlakase / ho phahama ha mochine o moholo oa bareki le tšebeletso ea mantlha.
5. Bala mohala oa AC ho hanyetsa ka Molao oa Ohm ho nka lintho tse kang manonyeletso a mabe kapa ho se nke lehlakore ho robehileng.
3. Qetello
Mehato e Latelang
Joale u lokela ho tseba hore na bothata ba hau ke bofe.
Haeba ke bothata #1- motlakase oa grid o phahame haholo- joale ke bothata ba k'hamphani ea Grid ea hau.Haeba u ka ba romella bopaki bohle boo ke bo khothalelitseng ba tla tlameha ho bo lokisa.
Haeba ke bothata #2- grid e lokile, ho phahama ha voltage ho ka tlase ho 2%, empa e ntse e tsamaea, joale likhetho tsa hau ke:
1. Ho ipapisitse le k'hamphani ea Grid ea hau, u ka 'na ua lumelloa ho fetola moeli oa leeto la motlakase oa metsotso e 10 ho ea boleng bo lumelletsoeng (kapa haeba u le lehlohonolo le ho feta).Fumana sparky ea hau ho hlahloba le Grid Company haeba u lumelloa ho etsa sena.
2. Haeba inverter ea hau e na le "Volt / Var" mode (tse ngata tsa morao-rao li etsa joalo) - joale kopa mochine oa hau hore o nolofalletse mokhoa ona ka lintlha tse behiloeng tse khothalletsoang ke k'hamphani ea sebaka sa hau sa Grid - sena se ka fokotsa palo le boima ba ho theoha ha motlakase.
3. Haeba seo se ke ke sa khoneha ka nako eo, haeba u na le 3 phepelo ea mekhahlelo, ho ntlafatsa ho 3 phase inverter hangata ho rarolla bothata - ha ho phahama ha motlakase ho hasana ka mekhahlelo ea 3.
4. Ho seng joalo u shebile ho ntlafatsa lithapo tsa hau tsa AC ho marang-rang kapa ho fokotsa matla a ho romela thepa a letsatsi la hau.
Haeba ke bothata #3- max voltage e nyoloha ka holimo ho 2% - joale haeba e sa tsoa kenngoa ho bonahala eka mochine oa hau ha o so kenye sistimi ho Standard.O lokela ho bua le bona mme o fumane tharollo.Mohlomong e tla kenyelletsa ho ntlafatsa kh'abela ea AC ho grid (sebelisa lithapo tse mafura kapa u khutsufatse thapo lipakeng tsa inverter le ntlha ea khokahano ea Grid).
Haeba ke bothata #4- Bothata ba lisebelisoa tsa inverter.Letsetsa tšehetso ea tekheniki ho fana ka phetoho.