Nigeze gusenya Inverter y'izuba ya $30,000kuko nasimbutse ikizamini cya SPD cy'iminota itanu— ntukongere gukora iryo kosa.

Ku rubuga rwacu Uruganda rwa Wenzhou SPDtwe ikizamini buri igikoresho cyo kurinda umuvudukombere yo kohereza. Uburyo bukwiye burimo igenzura ry'amaso, kurwanya ubushyuhe, Urwego rwo kurinda amashanyarazi (VPR), umuriro usohokana kugenzura ibipimo.

Iyi nkuru isobanura buri ntambwe mu Icyongereza cy'ikoranabuhanga gisanzwe, hashingiwe kuri kimwe urutonde rw'ibintu byatsinzwe/byatsinzwedukoresha kuri Ubuhinzi bw'izuba bwo mu Budage no muri Amerika.

Kuki Isuzuma rya SPD Ibintu Bijyanye n'Ingufu Zikomoka ku Mirasire y'Izuba n'Inganda

Ndacyibuka impumuro ya silikoni yahiye ubwo varistor irekuyeyemerewe Ingufu ya 6 kVmu mukiriya wo muri Amerika agasanduku k'ibikoresho bihuza imirasire y'izuba.

Rimwe SPD itarageragezwaishobora gufunga ikintu cyose ubuhinzi bw'izubaA ikizamini cy'iminota ibiribishobora gukumira ibyumweru byo kuruhukakandi urinde ibyawe umusaruro w'ingufu n'inyungu.

Bigenda bite iyo SPD yananiwe mu kibuga?

A igikoresho cyo kurinda umuvuduko cyananiwe (SPD)Ntikora urusaku — ihagarika gukora bucece.
Itsinda LED y'ububurira ishobora gukomeza kuba icyatsi kibisindetse na nyuma y'uko varistoryacitse cyangwa yacitse.

Mu 2022, itsinda ryacu ryakurikiranye Gufunga inverter ya 1.5 MWmu Buhinde kugira ngo SPD imwe yananiwebyari byarahindutse insinga. Aho hantu haratakaye Iminsi 14 yo gukoresha ingufu z'izuba nyinshiikiguzi Inshuro 45 ziyongerahokurusha SPD ubwayo.

Uwo munsi nize itegeko ry'agaciro: ikizamini gihendutse kiracyahendutse kurusha ikizamini gito cyane.

Uburyo imigozi y'izuba ihisha amashanyarazi arenze urugero

Muri sisitemu za PV (ingufu zikomoka ku mirasire y'izuba), Imigozi ya DCntabwo zihambiriye ku butaka neza — zo "Kureremba" hejuru y'ubushobozi bw'isi.
Iyo inkuba ihindagurika cyangwa ihindagurika ry'igihe gitoigera ku ruhande rwa DC, ishobora kuzamura voltage yose y'imigozi ku kigero kirenga 30 kVmu masegonda make gusa.

Inverter isobanura ko surge ari umuriro ukabije w'amashanyarazi, akenshi bigatuma habaho gufunga burundu.

Kugira ngo mbyirinde, nkora Ikizamini cyo kwirinda gushyushya icyuma cya kV 1kuri buri gice cya SPD mbere yo koherezwa.
Niba igisomwa kigwa munsi 10 MΩ, igikoresho cyanze ako kanya.

Imbonerahamwe iri hepfo igaragaza amakuru nyayo yerekeye ubushyuhe n'ibizamini bya VPRmu byiciro 20 biheruka by'umusaruro muri Uruganda rwa Wenzhou SPD.

Urugero rw'ibyavuye mu igeragezwa rya DC SPD — uburyo bwo kwirinda gushyushya no kurinda amashanyarazi (VPR) munsi y'igeragezwa rya 1 kV.

Moteri z'inganda nazo zirarakaye cyane

Inganda Ibikoresho byo gutwara moteri za ACZishobora kwibasirwa n’amashanyarazi arenze urugero nk’uko imirasire y’izuba irushaho kwibasirwa n’amashanyarazi arenze urugero - rimwe na rimwe zirushaho kwibasirwa n’ayo mahirwe.

A Itsinda rigenzura moteri rya 480 Vifite umuvuduko muto cyane ugereranyije n'umugozi wa PV 1000 V, ari nabyo bituma hafatwa icyemezo n'igeragezwa rya AC SPD (Igikoresho cyo Kurinda Gusurira)kunenga rwose.

Umwe mu bakiriya banjye bo muri Amerika bakora pan-building yabyize mu buryo bugoye. module ya SPD itarageragezwabyateje ihagarikwa ritunguranye ku wa Gatandatu nijoro, bituma yishyura abakozi be amasaha y'inyongera kugira ngo batangire kongera kubaka uruganda.

Kuva icyo gihe, akomeje gushimangira ko agomba guhabwa raporo y'igihe cyo kuvunikakuri buri gice mbere yo kwemeza itegeko ryo kugura. Nkoresha gusa $0.40 y'igihe cyo gukora ikizamini kuri buri gice, kandi arakiza arenga $400 mu mirimo y'uburibwe— a 1,000× kugaruzaku igenzura ryoroshye ry'ubuziranenge.

Ibikoresho Ukeneye Kugerageza Igikoresho cyo Kurinda Ihindagurika ry'Ingufu

yigeze kubona umuguzi agerageza icyuma gikingira umuvuduko w'amashanyarazi akoresheje Ibikoresho by'ikoranabuhanga bya $9 - multimeter y'iduka — yarokotse ibizamini bibiri mbere yuko isha.

Mu muryango wacu Laboratwari y'uruganda rwa SPD i Wenzhou, twishingikiriza kuri umwuga ibikoresho byo gupima ingufu z'amashanyarazibyagenewe byombi Igenzura rya DC na AC SPD.

Dore ibikoresho bine by'ingenziburi mutekinisiye agomba gerageza igikoresho cyo kurinda indwara (SPD)mu mutekano kandi neza:

①A multimeter ya digitale igenzurwaku igenzura ry'ibanze ry'amashanyarazi n'uburyo ahoraho.

②A Igipimo cy'ubudahangarwa bw'ingufu cya kV 1 (megger)kugenzura ubushyuhe buri hagati y'imirongo n'ubutaka.

③A moteri itwara ingufu (1.2/50 µs cyangwa 8/20 µs)gupima voltage nyayo yo gufunga munsi y'umutwaro.

④A kamera ifata amashusho y'ubushyuhekugira ngo hamenyekane ahantu hashyushye hihishe hamwe n'ibirindiro mbere yo gutsindwa.

Ibi bikoresho bine hamwe bikubiyemo hejuru ya 99% by'ibizamini bya SPD, kuva ku bushakashatsi ku ruganda kugeza ku igenzura ry’aho ibikorwa bikorerwa mu mirima ikoresha ingufu zikomoka ku mirasire y’izuba cyangwa inganda.

Ese koko nkeneye moteri ikora surge?

Nibyo rwose yego— niba ushaka kumenya uko igikoresho cyo kurinda indwara yo kuzura kw'izuba (SPD)ikora munsi ya umuvuduko nyawo w'amazi, moteri ikora ingufu nyinshintabwo ari amahitamo.

A meggerishobora gupima gusa insulation na open-circuit voltage, ariko ntishobora kwigana imiterere y'umuraba wa surge wa 8/20 µs cyangwa 1.2/50 µsibyo bigena uburyo SPD ifata ingufu mu gihe cy'igihe gito.

Mu muryango wacu Laboratwari yo gupima SPD mu ruganda, nkoresha 1.2/50 µs generator surge ishyizwe kuri 6 kV.
Kuri Modeli za DC 600 V SPD, Urwego rwo kurinda amashanyarazi (VPR)bigomba kugumaho munsi ya kV 1mu gihe cy'ikizamini.

Buri SPD twohereza ifite ikirango cyayo agaciro ka VPR kapimwe— uyu mubare ugaragara wuzuza icyizere ku bakiriya bacu muri Ubudage, Amerika, n'Ubuhinde, bishingikiriza ku mikorere ihoraho kandi yemejwe yo kurinda.

Ese nshobora gukodesha aho kugura?

Yego rwose — niba umusaruro wawe wa SPD cyangwa ingano y’ibizamini ari ibihe by’umwaka, gukodesha ibikoresho byo gupima uburinzi bw'umuvudukobishobora kuba ishoramari ry'ubwenge.

Urugero, iyo twiruka Ibice 5,000 bya SPDku ruganda rwacu rwa Wenzhou, njye gukodesha kamera ikoresha ubushyuhe ya FLIRku bijyanye na $90 ku cyumweru.

Itsinda ikizamini cyo gupima ubushyuhebifasha gutahura varistori zishyushyeibyo bishobora kuba bikiri gutsinda ikizamini cya megger, kugaragaza amakosa yihishe mbere yo koherezwa.

Mu gikorwa kimwe cyo gutunganya umusaruro, twabonye SPD eshatu zifite inengegukoresha kamera yo gukodesha — amafaranga yose yagabanutse mu gusubiramo imirimo n'ikiguzi cya garanti yishyuye amafaranga y'ubukode mu munsi umwe.

Imbonerahamwe iri hepfo igaragaza igereranya ry'ibiciro mu buryo bufatika byo gukodesha ugereranyije n'ibiciro byo kugura urufunguzo Ibikoresho byo gupima SPD.

Uburyo bwo gupima SPD intambwe ku yindi (DC na AC)

Ese ni ibya Sisitemu z'izuba za DCcyangwa Udupapuro two kugenzura moteri za AC, inzira yo gupima Ibikoresho birinda indwara (SPDs)ikurikiza logique imwe — imipaka y'amashanyarazi ni yo yonyine itandukanye.

Ku rubuga rwacu Ikigo cyo gupimisha cya Wenzhou SPD, nshyiramo inzira yo gupima intambwe ku yindiikoreshwa n'abakiriya mpuzamahanga muri Ubudage, Amerika, na Pakisitanikugira ngo harebwe niba SPD ari ingenzi mbere yo kohereza.

1.DC SPDsbipimwa kuri Ubudahangarwa bwo gukingira ubushyuhe bwa 600 Vmu gihe

2.NA SPDsbipimwa kuri Voltage y'umurongo wa V 277.

Byombi bihabwa 6 kV surge impulse (ishusho y'umuraba wa 8/20 µs)kandi bigomba gufunga munsi ya 1 kVmu gihe cy'ibirori.

Buri kizamini gisubirwamo kuri L–N, L–PEna N–PEinzira zo kurinda burundu mu gihe cy’ibiza nyabyo.

Intambwe ya 1 - Igenzura ry'amaso n'ubushobozi

Buri Ikizamini cya SPDitangirana na kugenzura amaso no kugenzura imbaraga z'amashanyarazi— intambwe yoroshye, nyamara niyo yakunze gusimburwa mu kibuga.

Ndatangira nkareba niba amazu yacitse, ibimenyetso byo gushya, cyangwa aho ibyuma bihagararaibyo bishobora gutera amakosa yo mu mfuruka. Hanyuma nanjye torque kuri buri screw kugeza kuri 0.8 Nmhakoreshejwe umushoferi ufite ubushobozi bwo gupima.

Igihe kimwe, mu igenzura ryakozwe mbere yo kohereza ibicuruzwa, nabonye umugozi umwe w'umuringahafi gucibwa munsi y'urushundura rw'icyuma gifunga. Byari kuba yahindutse umwuka mu gihe cy'inkuba ya mbere, guhita yica urusobe rw'uburinzi.

Kuva icyo gihe, nakoze kugenzura amaso n'imbaragaigice cy'itegeko cya buri Raporo y'isuzuma ry'ubuziranenge bwa SPDtwohereza ku bakiriya muri Uburayi na Amerika

Intambwe ya 2 - Ubudahangarwa bw'ubushyuhe

Intambwe ikurikira y'ingenzi muri Isuzuma rya SPDni gupima ubukana bw'ubushyuheGukoresha 1 kV ivanze, Npima uburiganya hagati umurongo (L) n'ubutaka bukingira (PE).

Buri tsinda rigomba kubungabunga >10 MΩIsomo riri munsi y'uyu mubare w'abagomba kuva kwa varistor hakiri kare, bikabangamira uburinzi bw'umuvuduko. SPD iyo ari yo yose igaragaza ni yanze ako kanya— nta bidasanzwe.

Ibi byoroshye ikizamini cya meggerikumira amakosa ahishe ashobora gutera inverters zikoresha imirasire y'izuba cyangwa moteri z'ingandagutsindwa mu gihe cy'impanuka.

Intambwe ya 3 - Urwego rwo kurinda amashanyarazi

Itsinda Ikizamini cyo kurinda urwego rw'amashanyarazi (VPR)ni ngombwa kugira ngo umenye neza ko SPD irashyiraho ingufu nyinshi z'amashanyarazi ziyongera mu buryo butekanyeGukoresha moteri ikora ingufu zirenze urugero (surge generator) ishyirwa kuri 3 kA, 8/20 µs, Npima voltage yo gufunga nkoresheje oscilloscope.

Kuri 600 V DC SPD, VPR igomba kuguma munsi ya 900 VMu itsinda ryacu riheruka, VPR yapimwe yari 820 V, byemeza ko amatsinda yose yatsinze igenzura.

Iyi ntambwe iremeza ko SPD izarinda inverters zikoresha imirasire y'izuba n'ibikoresho by'ingandamu gihe cy'izamuka ry'ibiciro mu buryo bufatika, bikarinda igihe cyo kuruhuka gitwara amafaranga menshi.

Intambwe ya 4 - Umuyoboro w'amazi usohoka muri Uc

Isuzuma ry'uko amazi asohokayemeza ko SPD ikomeje kuba nziza iyo ikoresha ingufu z'amashanyarazi zihorahoNzamura voltage ya DC kugira ngo 600Vkandi upime umuriro usohoka.

Dukurikije amahame yacu, umuyoboro w'amazi usohoka ugomba kuguma munsi ya 1 mAIgice icyo ari cyo cyose kirenze uyu mupaka—nk'igisomwa kimwe 1.2 mA—akunze kugira gushyuha cyane no kunanirwa mu bushyuhe bwinshi. Izi SPD ni yajugunywe, ntabwo yigeze igabanuka.

Iki kizamini kirahamya uburinzi bwizewe ku mirasire y'izuba n'ibikoresho by'inganda, gukumira amakosa ashobora gutuma habaho igihe gitwara amafaranga menshi.

Intambwe ya 5 - Ikimenyetso cy'iherezo ry'ubuzima

Igenzura ry'ibipimo by'iherezo ry'ubuzimani ingenzi kugira ngo habeho Uburinzi bwa SPD burakora.

Ndaguhishurira varistor mu gihe cy'amasegonda 5, hanyuma uyirekure. Ibendera ry'ikimenyetso rigomba kuba umutukucyangwa LED igomba kuzimya.

A ikimenyetso cyo gufunga cyangwa gukora nabiishobora kuyobya abakoresha bagatekereza ko SPD igikora. Igice icyo ari cyo cyose gishobora iracyagaragaza icyatsi kibisinyuma y'ikizamini ni yanze ako kanya.

Ibisanzwe ikizamini cy'iherezo ry'ubuzimaibuza gutsindwa kwihishe, kurinda panels z'izuba cyangwa sisitemu z'inganda kwangirika bitunguranye.

 Uburyo bwo kumenya SPD yananiwe

Ndetse na SPD isa nkaho "ikora" ishobora gutsindwa bucece. Iyo igenzuwe, ibisigazwa by'amakarabishobora kugaragara aho varistor yigeze kwicara, bigaragaza ibyangiritse imbere.

Shaka ibimenyetso bitatu by'ingenzi by'ikosa:

1.Ibara ry'ikimenyetso– iyo igaragaje ikimenyetso cy’ikinyoma cy’ “ubuzima bwiza”, SPD iba yangiritse.

2.Ahantu hashyuha cyane– agace ako ari ko kose kari hejuru 70 °Cni umuburo.

3.Umuyoboro ukabije w'amazi asohoka– ibyasomwe haruguru 1 mAbigaragaza ko hari icyo wananiwe.

Ikimenyetso icyo ari cyo cyose muri ibiyemeza ko SPD ari ntabwo izongera gutanga uburinzi ku muvuduko w'amazikandi bigomba kuba yasimbuwe ako kanya.

 Impamvu ibimenyetso bya SPD bishobora kuyobya

SPD nyinshi zikoresha amabendera ya mekanikenk'ibimenyetso by'iherezo ry'ubuzima. Ibi bibendera biragwa gusa iyo kwiyongera k'umuvuduko w'amazi birenga 250 A, bivuze ibikorwa byo gutinda gukabije kw'amashanyarazibishobora kwangiza varistor hatabayeho gutera ikimenyetso.

Kugira ngo umenye neza isuzuma, koresha kamera ikoresha ubushyuhekugira ngo hamenyekane ahantu hashyuha cyane. Mu itsinda riherutse kuba rya SPD 480, Ibice 12byerekanye Ahantu hashyuha cyane hashyuha cyane hagera kuri 80°C, ariko gusa 3 bari bafite amabendera yaguye.

Isomo:Ntukizere ikimenyetso gusa—gupima ubushyuhe no kugenzura amazi asohokani ingenzi ku mutekano.

Megger vs. Oscilloscope: Gusobanukirwa ibisubizo by'ibizamini bya SPD

Mu gihe cyo gupima SPDs, meggeribipimo kurwanya ubushyuhe, mu gihe osiloskopiibitaramo imikorere yo gufunga voltage.

Mu itsinda rimwe, hagaragajwe igice 15 MΩkuri megger ariko ihambiriwe kuri 1.4 kV, birenga ibyagenwe na 400VIshusho ya megger yasaga n'aho ari nziza, ariko oscilloscope yagaragaje ibyago nyakuri.

Ingingo z'ingenzi zo gufata:Buri gihe huza ibizamini byo kurwanya hakoreshejwe uburyo bwo kugenzura amashanyarazikugira ngo urebe ko SPD ikora neza. Iyo igikoresho kinaniwe, hita ukemura ikibazo ako kanya—rimwe na rimwe ivugurura ry'uburyo bwo guteka muri varistorbirakenewe.

Amakosa asanzwe yo gupima SPD n'uburyo bwo kuyarinda

Gupima SPD nabi bishobora kwangiza igikoresho n'ibikoresho byawe. Dore uko bigenda. amakosa ane asanzwe:

1.Kudahagarika SPD– Buri gihe shyira igikoresho mu gace k'amashanyarazi kugira ngo wirinde ko habaho imiterere itari yo cyangwa ibishashi.

2.Gukoresha voltage idakwiriye yo gupima– Reba ibisabwa kuri AC cyangwa DC SPDs mbere yo gupima.

3.Kugerageza ibice bikonje– Reka SPD igere ku 25 °Ckugira ngo harebwe neza niba hari ubushyuhe n'ibipimo by'amazi asohoka.

4.Kwirengagiza uburebure bw'insinga n'ingaruka z'urushundura– Ongeraho 1 m iyoboraku mibare yawe kugira ngo urebe niba hari imbaraga zidasanzwe cyangwa ubushobozi bwo guhindagurika.

Ukurikije izi ngamba zo kwirinda, urinda SPD yawe, ibikoresho byawe byo gupima, kandi ukirinda ko amashanyarazi ahenze cyane.

 Ikosa rya 1 - Gupima SPDs mugihe zihujwe na Circuit

Imwe mu makosa akunze kugaragara ni gupima SPD mu gihe ikiri mu murongo wa 'live circuit'Mu matsinda aho ubutaka buhurira n'imitwaro, umuntu ashobora gusoma 2 MΩkuva ku miyoboro ya moteri aho kuva kuri SPD ubwayo, biganisha kuri ibisubizo by'ibinyoma byo gutsinda/gutsindwa.

Imyitozo ikwiye:Buri gihe fungura agace kagabanya umuvuduko hanyuma uvange neza na SPDmbere yo gupima. Koresha uburyo bwo ikimenyetso cyangwa ikimenyetso cy'umuburokugira ngo hirindwe ko habaho kongera guhura kw'ibiyobyabwenge mu buryo butunguranye mu gihe cyo gupima.

 Ikosa rya 2 - Kureka gukaraba ubushyuhe kugira ngo upime SPD

Ubushyuhe bugira ingaruka zikomeye ku bipimo bya SPD byo kuvogera.Varistori yapimwe kuri 5 °Cishobora kwerekana Kugabanuka kw'amazi ku kigero cya 20%kurusha ubushyuhe bw'icyumba, bishobora gutera gutsindwa kw'ibinyomacyangwa inenge zabuze.

Uburyo bwiza bwo gukora:Koresha icyumba kigenzurwa n'ubushyuhebyashyizwe kuri 25 °C ± 2 °Cna kwinika SPDs mu gihe cy'amasaha abirimbere yo gupima. Iyi ntambwe yoroshye yagabanyije igipimo cyacu cyo kugaruka kuri SPD ku kigero cya 35%kandi bikanatuma haboneka ibisubizo nyabyo kurushaho.

 Ikosa rya 3 - Kwirengagiza uburyo bwo gupima ingano y'umushongi mu bizamini bya SPD

Abakoresha ibizamini birebire batanga uburyo bwo gukwirakwiza umusaruro, ubusanzwe 1 µH kuri metero, bishobora Ongeraho kugeza kuri 20 V ku muvuduko wa 8/20 µs.

Uburyo bwiza bwo gukora:Buri gihe tunganya sisitemu yawe yo gupima ukoresheje abahanga nyabo bapimauzakoresha, andika igiciro icyo ari cyo cyose cy'amashanyarazina Kuramo mu isomwa rya nyumaIbi bireba ibipimo by'urwego rw'uburinzi bw'amashanyarazi (VPR) nezakuri buri SPD.

Igihe cyo gusimbuza SPD yawe nyuma yo gupimwa

Kumenya igihe cyo gusimbuza igikoresho cyo kurinda isuri (SPD)ni ingenzi cyane kugira ngo wirinde igihe cyo kuruhuka gitwara amafaranga menshi.

Hita usimbura SPD ako kanyaniba hari parametero irahindagurika ku kigero kirenze 10% ugereranije n'igipimo cyayo cya mbereIbipimo by'ingenzi birimo:

1.Umuvuduko w'amazi uva >1 mA

2.Urugendo rwo kurinda amashanyarazi (VPR) ruriyongera >10%

3.Ubushyuhe bw'ifi ya SPD burenze 70 °C

Buri gihe andika itariki yo gusimbuzana gusubiza SPD ishaje mu rugandaisesengura ry'ibyago. Ibi bireba ko kugenzura ubuziranengekandi bigafasha mu gukumira ibibazo bisubira mu mikoreshereze y'izuba cyangwa inganda.

Ese nkwiye gushyiraho itariki ya kalendari?

Yego rwose. Ndetse SPD zisa neza zishobora kwangirika uko igihe kigenda gihitaKugira ngo tugumane icyizere kurinda umuvuduko w'amazi, turakugira inama:

1.Imirima ikoreshwa n'izuba:gahunda yo gusimbuza buri imyaka itanu

2.Ibyuma by'inganda bikoresha moteri:gahunda yo gusimbuza buri imyaka itatu

Buri SPD ihabwa Agapapuro karimo kode ya QRkwerekana itariki ntarengwa itaha. Abakiriya bashobora gushakisha kugira ngo ukurikirane gahunda zo gusimbuza, kwemeza ko habaho guhinduranya ibintu ku gihe no kwirinda gutsindwa gutunguranye. Tekereza ko ari uburyo bwo Icyibutso cy'"guhindura amavuta" ku bikoresho byawe byo kurinda isuri.

 Ese nshobora kuvugurura Varistor cyangwa SPD aho kuyisimbura?

Kuvugurura varistor cyangwa SPD ntibyemewe.Varistor ikozwe muri ceramic ivanze n'amazi; iyo impeke zayo zishongeshejwe n'umuraba, iba ikirahure gihoraho kandi ntikiba kigishobora kurinda sisitemu yawe. Kugerageza kongera gukoresha utuzu cyangwa SPD zishaje kenshi igura amafaranga menshi kurusha igikoresho gishya.

Kugira ngo turusheho kumererwa neza, dutanga Inguzanyo ya 5% ku mibare ya SPD yasubijwe, natwe kongera gukoresha okiside ya zincmu buryo bunoze, hakagaragazwa inyungu ku bidukikije no ku bukungu.

Umwanzuro

Gusuzuma no kugenzura SPDs zawe buri giheni ingenzi cyane mu kwirinda kwangiza ibikoresho bihenze. Ubudahangarwa bw'ubushyuhe, urwego rwo kurinda amashanyarazi, n'umuyoboro w'amazi uvakuri buri gice, kandi gusimbura SPDs zigaragaza ibimenyetso byose byo gutsindwambere yuko bigira ingaruka ku mirasire y'izuba cyangwa inganda zawe.

Kuri Ibikoresho byo kurinda isuri (SPDs) byapimwe mbere yo koherezwa mu Budage cyangwa muri Amerika bivuye mu ruganda rwacu rwa Wenzhou, twandikire kuri Imodoka@leikexing.comTurahamya ko SPD nziza cyane, zageragejwe n'urugandayiteguye gushyirwaho mu cyumweru gitaha.