Sistema na panagtipon na enerhiyaSay -assisted renewable energy grid connection solutions et manunan naapag ed duaran klase: AC parallel connection tan DC coupling.
Say solusyon na AC parallel connection, a singa nanengneng ed pigura, et manutukoy ed saray kagawaan ya akakonekta ed renewable energy electronic grid-, a singa saray photovoltaic inverter odino wind turbine converter, ya akakonekta ed sakey ya energy storage converter (PCS) panamegley na AC power grid. Diad silong na nankakasakey a koordinasyon tan panangontrol na EMS, manggagawa na saray kimey a singa say peak shaving tan valley filling, pamaaligwas ed inkasusto na forecast, tan panag-smooth.
Saray manunan bentaha na AC parallel connection schemes et kaiba so simpli tan malinew ya koneksyon na kuryente ed baetan na saray kagawaan, functional decoupling, tan mainomay ya estandardisasyon na saray proseso na panagpaalagey tan panaggawa na kagawaan; say manunan disbentaha et say mas atagey a gastos parad saray linya tan konektadon kagawaan, mas maples a control response speed ya nakaukolan parad PCS, tan mas abeban inkaepektibo parad dakel a enerhiyan manguuman.
Say coupling scheme et epektibon makausar ed DC link ya walad maslak ya renewable energy grid-connected power generation systems, ya direktan mangiyarum na battery energy storage devices pian nabawasan so dakel ya power conversions na renewable energy power. Saya so mamaaligwas ed koneksyon na sistema ed grid tan say inkaepektibo na panagtipon na enerhiya; direkta met ya uusaren to ray wala lan renewable energy grid-connected equipment tan grid connection channels, ya agla kaukolan so pamalaknab na AC equipment tan nabawasan so gastos ed hardware investment. Balet, walay pankakasakey na control system tan say wala lan kagawaan ya akakonekta ed renewable energy grid-, say inka-malet to et mandedepende ed grid connection control method na orihinal ya sistema na renewable energy.
No alaen so full-power wind turbine grid-connected converter bilang alimbawa, a singa nanengneng ed pigura, saya et kaslakan ya AC-DC-AC "back-to-back" ya istruktura. Say grid-side converter et mankikimey ed DC-side voltage regulation mode, bangta say turbine-side converter et mankikimey ed wind turbine power control mode odino torque control mode. Sarayan dua et naapag na DC ya dapag tan independentin kontrolado, ya say baleg ya capacitor bank ed dapag na DC et mankikimey bilang buffer tan decoupling mechanism. Kanian, diad pangikonekta na sakey a kapasidad na BESS ed DC side pian makagawa na integrated wind tan energy storage system, say grid-connected power na wind turbine et nayarin nakontrol a maong tan say enerhiya et nayarin iyalis legay ilalabas na panaon, ya anggapoy baleg ya epekto to ed wind turbine system, lalo la ed panangontrol ed wind turbine converter.
Say manunan prinsipyo na panangontrol to et onia: Say lokal a controller so mangiletneg na paraan na panagkimey, a singa say peak shaving tan valley filling, pamaaligwas ed inkasusto na prediksion, odino panag-smooth, tan mangitipon na impormasyon nipaakar ed grid dispatch pian nagawa so total grid-connected power target command ∑P* parad wind-storage system diad sakey a bekta; manbabantay ed P ya pakawalaan na kuryente na turbina na dagemNEtan say kipapasen na sistema na panag-iponpon na enerhiya ed mismon panaon, tan komprehensibon mankuenta tan manggawa na sistema na panag-iponpon na enerhiya ed panag-charge tan panag-discharge na control command P*BESS:
Say BESS so mangokontrol ed wind turbine panamegley na DC/DC converter, ya mansusubaybay ed P*BESSsaray ganggan pian nawalaan na panagtipon tan pangibulos na enerhiya ed baetan na DC ya dapag na wind turbine converter tan say baterya; say grid-side converter et mankikimey ed rectifier mode, ya mamapabiskeg ed DC side voltage Vde pian naabot so total ya grid-konektadon power output ∑P na wind turbine:
No say SOC na sistema na panagtipon na enerhiya et walad kritikal ya estado na overcharge, kaukolan met ya limitaan na lokal a controller so output command P*NEna wind turbine diad pangi-iskedyul ed wind turbine master controller, pian narealisar so limitadon pakayari na wind turbine.
Say pinasimplin diagram na control system et nanengneng ed pigura. Vdctan Upinagkagiya na sukatmipara ed saray epektibon balor na DC-side voltage na wind turbine converter tan say phase voltage na grid, unong ed inkauksoy da; SiakBEss, Idc, INE, tan siakpinagkagiya na sukatmipara ed panag-charge tan panag-discharge na enerhiya na sistema na panagtipon na enerhiya, say DC current na wind turbine grid-side converter (ya onaagus manlapud current-side bus capacitor bank ya anggad grid-side converter IGBT bridge arm), say DC current na wind turbine machine- ya onkukurang ed gilig na makina converter IGBT bridge arm to the DC-side bus capacitor bank), tan say grid-connected current na wind turbine grid-side converter (salanti, say dagup na grid-connected current na wind-storage system).
Parad double-fed induction generator (DFIG) wind turbines, say power generation system (PNE) et tugyopen na parehon rotor-side tan stator-side output power, ya kaukolan ya ikonsidera na lokal a controller no mankuenta na power command parad sistema na panagtipon na enerhiya.
Nanengneng ya diad wind-storage system, parehon say grid-side converter tan say turbine-side converter et mansiasiansia ed orihinal ya DC-side voltage regulation control mode tan turbine-side power control mode, ya ag kaukolan ya umanen so control algorithm. Balet, say nipanpanaon tan suston pakagamor na impormasyon nipaakar ed kipapasen na sistema na panagsimpenan na dagem et importante parad lokal a managkontrol pian nadampot so nankakasakey a panangontrol ed sistema na panagsimpenan na enerhiya tan say manunan sistema na panangontrol na turbina na dagem.
Say control scheme parad parallel photovoltaic-storage DC system et nanengneng ed pigura. Sayan control scheme et ag makaapekto ed operasyon na photovoltaic inverter, ya lanang ya mankikimey ed peak-load mode na energy storage system odino diad short-term power-limiting mode. Say sistema na panagtipon na enerhiya, kaiba so lokal a controller, et manggagawa na maples a regulasyon na kuryente pian napansiansia so grid- ya akakonekta ed enerhiya na photovoltaic-storage system diad loob na naabuloyan ya control error bandwidth.
Say panulong ed koneksyon na grid na balon lapuan na enerhiya et sakey ya importantin lawak na aplikasyon na BESS (Balanced Energy Storage System). Manlapud panmoria na control time scale, saya so nayarin naapag ed kada oras a peak-filling tan minute-level ya pamaaligwas ed inkasusto na forecast tan pamaabig ed saray fluctuations. Say inmuna et sigpot ya manguusar ed kapasidad na wala lan grid pian naakomodar iray balon lapuan na enerhiya tan nabawasan so...
Say panulong ed koneksyon na renewable energy grid et sakey a importantin lawak na aplikasyon parad Baseline Energy Saving System (BESS). Diad panmoria na panaon, saya so nayarin naapag ed kada oras a panag-ahit ed peak tan panagpano na lawak, tan minuton-level ya inyaligwas ed inkasusto na forecast tan panag-smooth na saray fluctuations. Say unaan et makabkabaliksan parad sigpot ya pangusar ed kapasidad na renewable energy na wala lan grid, pambawas ed saray reserba na conventional unit, odino pangipaliis ed andukey ya panaon na renewable energy curtailment. Say unor, kaiba iray teknolohiya ed panag-forecast na renewable energy generation, et mamaaligwas ed panagplano tan pangipawit na renewable energy grid connection, mamaaligwas ed grid friendly, tan mamapaabeba ed okupasyon na saray rekursos na grid fast frequency regulation.
Diad saray praktikal a proyekto, say peak shaving tan valley filling ya aplikasyon et mankaukolan na BESS systems ya sarag toy mantipon odino mangibulos na pigaran oras ya kuryente, ya mankaukolan na angkakabaleg iran -kapasidad na baterya. Diad silong na kaplesan iran modelo na negosyo, say pangiyaplika labat ed sayan function et mabetbet ya aliwan makatipid, odino walay baleg a peligro na ibawas na saray benepisyo ed ekonomya legan na panaon. Balet, diad tuloytuloy ya iyaaligwas na inkasusto na panag-forecast na renewable energy generation tan saray BESS power control algorithms, posiblen tuloy ya i-integrate iray minute-level BESS-assisted renewable energy grid connection functions ed saray proyekto na peak shaving tan valley filling. Saya so mangiter na pankanawnawa ed sakey a proyekto ya manggawa na komprehensibon aplikasyon diad silong na nankakasakey a panangasikaso na sakey ya EMS odino lokal a controller, balanglan say panaon-sharing odino mankakasakey, diad ontan et napaaligwas so inkalapagan ya ekonomya na proyekto. Niarum ni, no ikonsidera so power tan capacity configuration ya kakaukolanen pian napaaligwas so inkasusto na forecast tan smoothing functions, maslak ed sarayan aplikasyon et mangilalanor na abeban-power, atagey-frequency power-type ya panagtipon na enerhiya. Kanian, say pangiyarum ed sarayan function et walaan na limitadon epekto ed configuration na saray wala lan peak-shaving tan valley-filling projects, kanian nagawaan itan ed teknikal.