Muhurongwa hwe photovoltaic (PV), magetsi anogadzirwa anonyanya kushandiswa kupa simba. Kana kugadzirwa kwacho kwapfuura kudiwa kwemutoro, magetsi akawandisa anodzokera mu grid, zvichigadzira "reverse current." Mitemo yegrid inowanzo rambidza kudzokera shure kusina mvumo, uye kupa simba risina mvumo kunogona kukonzera zvirango. Kune mapurojekiti ePV akagadzirirwa kuzvishandisa pasina kupa simba mu grid, kudzivirira kudzoka kwesimba kwakakosha kuti uwane simba rakasununguka rinogara kwenguva refu.
Chii Chinonzi Anti-Backflow?
Muchirongwa chePV, ma solar modules anogadzira magetsi akananga (DC), ayo anoshandurwa kuita magetsi achinjana (AC) ne inverter kuti ape magetsi emunharaunda. Kana magetsi akawandisa, magetsi akawandisa anodzokera mu grid, zvichiita kuti magetsi adzokere kumashure. Masisitimu ane simba re anti-backflow anogona kugadzirisa simba re inverter kuti ave nechokwadi chekuti magetsi anogadzirwa anodyiwa zvizere nemagetsi emunharaunda, zvichidzivirira simba rakawandisa kuti risapinde mu grid.
Sei Uchifanira Kuisa Anti-Backflow?
Zvikonzero zvikuru zvekuisa anti-backflow zvinosanganisira:
1. Zvirambidzo zveGrid Policy:Mune dzimwe nzvimbo, zvirambidzo zvegrid kana mitemo zvinorambidza kuisa magetsi mugrid. Kusashanda zvakanaka kwemagetsi pasina mvumo kunogona kukonzera kurangwa.
2. Miganhu yekubatanidza grid:Grid iyi inoisa miganhu yakasimba pahuwandu hwesimba rinogona kuiswa mairi. Kupfuura miganhu iyi pasina kudzora kunogona kukanganisa kugadzikana kwegrid.
3. Nheyo Yekuzvinyima:Masisitimu ePV akagadzirirwa kuzvishandisa ega anonyanya kukosha pakushandisa mutoro wemuno. Simba ripi zvaro rakawandisa rinofanira kuvharirwa kuti risapinde mugrid uchishandisa michina inodzivirira kudzoka kwemvura.
Nheyo yekushanda yeAnti-Backflow
Masisitimu ekudzivirira kudzokera shure anowanzo sanganisira mita yekudzivirira kudzokera shure uye transformer yemagetsi (CT) yakaiswa pamutsetse mukuru. Izvi zvikamu zvinoyera simba renguva chaiyo uye kuyerera kwemagetsi. Kana magetsi emagetsi akaonekwa, mita yacho inotaurirana data rekudzoka shure kune inverter kuburikidza neRS485 communication. Inverter inopindura mukati memasekonzi, ichideredza simba rayo rekubudisa kuti ive nechokwadi chekuti kuyerera kwemagetsi mugrid kwave pedyo ne zero.
Mhinduro Dzinodzivirira Kudzokera Kumashure
Magadzirirwo akasiyana anowanikwa kuti agadzirise mamiriro akasiyana-siyana:
1. Mhinduro yeSisitimu yeKurwisa Kudzokera Kwemvura muGanho Rimwe
· Midziyo inodiwa: inverter yakasungirirwa pagrid, meter inodzivirira kufamba kwemvura, uye tambo yekutaurirana.
· Yakakodzera masisitimu madiki ePV ekugara.
2. Mhinduro yeSisitimu yeAnti-Backflow yeMatanho Matatu
· Kune masisitimu ekugara ane simba shoma, maDC anti-backflow mita anogona kubatanidzwa zvakananga kuma AC output terminals e inverter.
· Kune masisitimu ane simba guru, maCT transformer anoona magetsi ari panzvimbo yekubatanidza magetsi. Kubuda kweCT kunowedzerwa uye kunoiswa mu anti-backflow meter kuti kuyera simba nemazvo.
3. Mhinduro yeSisitimu yeMulti-Inverter Anti-Backflow
· Ma inverter akawanda akabatana kuburikidza ne communication interfaces kune data logger.
· Mhinduro iyi yakakodzera kune magadzirirwo makuru, ichipa kugona kwepamusoro uye mashandiro akasimba.
Pfupiso
Mhinduro dzinodzivisa kudzokera shure dzinogadzirisa zvinodiwa nemutemo we "grid-connected asi kwete feed-in" wenzvimbo dzakati. Dzinosimudzira kugadzikana kwegrid, dzinovandudza kuchengetedzeka kwemasisitimu, dzinovandudza mashandiro esimba, uye dzinoenderana netekinoroji nemaitiro ari kuchinja. Nekushandisa masisitimu akagadzirirwa ekudzivirira kudzokera shure, mapurojekiti ePV anogona kuve nechokwadi chekutevedzera mitemo, kuvimbika, uye kushanda zvakanaka kwehupfumi.
