Nhau

I. Nhanganyaya: Kudiwa Kwekudzivirira Munguva Dzemagetsi Akawanda muDC uye Kukosha Kwakakosha kweDC Isolation Switch

Nekukurumidza kukura kwesimba idzva, masisitimu eDC ane simba guru (HVDC) anoshandiswa zvakanyanya mu photovoltaic (PV), kuchengetwa kwesimba uye kutakura vanhu nechitima. Kushanda kwavo kwakachengeteka kwakakosha, sezvo kutungamira kweHVDC kwakasimba uye kushaikwa kwe zero-crossing yechisikigo kunoita kuti dziviriro yekuparadzanisa uye zvikanganiso ive yakaoma. Midziyo inoshanda uye yakavimbika yekuparadzanisa vanhu yakakosha.

Semudziyo unokosha wekudzivirira HVDC,Chinja cheDC Kuzviparadzanisa(DC disconnect switch) inobvisa macircuit, inobvisa zvikanganiso, uye inoita kuti pave nekuchengetedzeka. Kusiyana nemaAC switches, yakagadzirirwa maDC arcs akaoma kudzima, uye mashandiro ayo pasi pemagetsi akakwira anosarudza zvakananga mazinga ekudzivirira sisitimu.

Chinyorwa chino chinotsanangura zvakadzama nezveChinja cheDC Kuzviparadzanisakubudirira kwekushanda uye kuvimbika, kuongorora kukosha kwayo kukuru mukudzivirira kweHVDC kutungamira kusarudzwa kwekushandisa.

II. Kubudirira Kwebasa: Kujairana Nemamiriro Ezvinhu Ane Voltage Yakakwira

Mamiriro eHVDC anoda mashandiro e switch yekuparadzanisa magetsi zvakanyanya, kusanganisira kushivirira magetsi akawanda uye kudzvinyirira arc zvinobudirira. DC Isolation Switch inoita zvinhu zviviri kuti ikwanise kuzadzisa zvinodiwa izvi.

Mukutsungirira kwemagetsi ane simba guru, chizvarwa chitsva chine kuvandudzwa kwechimiro nezvinhu, kuchienderana ne1500VDC uye pasi (uye pamusoro pemapurojekiti akakosha). Kudzivirira kwakasimba uye kubatana kwakagadziridzwa kunodzivirira kuputsika. Zvinoenderana ne "Special Standards and Certification Requirements for DC Isolation Switches for Photovoltaic Applications", maswichi anoenderana neIEC 60947-3 anoshanda zvakadzikama pamagetsi akayerwa, nekupisa kwecopper conductor kukwira ≤60K.

Pakushanda zvakanaka, kudzima arc-extinguishing yemagnetic blow arc uye kupwanya mapoinzi akawanda zvinokurumidza kudzvinyirira maDC arcs (asina kuyambuka kwemhando yepamusoro). Semuenzaniso, maswichi eABB Emax series anoita kuti 1500V DC / 100kA isapwanye zvakanaka, zvichidzivirira zvikanganiso.

Kuvandudzwa uku kunoputsa mitemo yechinyakare yekuchinja, zvichiita kuti mapurojekiti eHVDC ashande zvakachengeteka.

III. Kuvandudzwa Kwekuvimbika: Kugadzikana Kwenguva Refu

Kupfuura mashandiro, DC Isolation Switch itsva inovandudza kuvimbika, kugadzirisa hupenyu hupfupi hwebasa uye matambudziko ekugadzirisa zvakanyanya mumamiriro ezvinhu akaoma.

Kubata ma "contacts" anopfekwa zvakanyanya uye "transmission" yakagadziriswa inowedzera hupenyu hwe "mechanical" kusvika kumabasa anopfuura zviuru gumi, zvichideredza kugadzirisa uye mari—zvakanakira mapurojekiti makuru e "PV" ne "energy storage".

Nedziviriro yeIP66, inodzivirira kupisa kwakanyanya (-40℃ kusvika 85℃), hunyoro uye munyu, zvichiita kuti ishande zvakanaka panze/mumaindasitiri.

Inosanganawo neIEC 60947-3 uye GB/T 14048.3 zvinodiwa, zvichivimbisa kuchengetedzeka uye kutevedzera mitemo.

IV. Kugadziriswa Kwemamiriro Ezvinhu Akazara

Nekuburitswa kwemagetsi maviri, DC Isolation Switch inoshandiswa zvakanyanya muminda yepakati peHVDC: mativi ePV plant DC (kupatsanurwa panguva yekugadzirisa), masisitimu ekuchengetera simba (kupatsanurwa kwebhatiri-converter), uye magetsi eDC ekufambisa njanji/maindasitiri (kucheka zvikanganiso).

V. Mareferensi

1. "Zvinodiwa zveMaitiro Akakosha uye Zvitupa zveDC Isolation Switches dzePhotovoltaic Applications" — China Electrical Equipment Industry Association

2. IEC 60947-3 Standard: Chigadziko cheswitch-voltage chakaderera uye chigadziko chekudzora — Chikamu 3

3. Bhuku reChigadzirwa cheABB Emax Series DC Isolation Switch

VI. Mibvunzo Inowanzo bvunzwa

Mubvunzo 1: Ndeupi musiyano mukuru uripo pakati pemaswichi eDC neAC isolation? A1: Maswichi eDC anoshandisa arc-extinguishing chaiyo (semuenzaniso, magnetic blow) kune maDC arcs akaoma kudzima; maswichi eAC anoshandisa AC arc zero-crossing.

Mubvunzo wechipiri: Inokwanisa kushandisa magetsi api? A2: 1500VDC zvichidzika; zvimwe zvigadzirwa zvinotsigira mazinga akakwira emapurojekiti akakosha.

Mubvunzo wechitatu: Ungava nechokwadi chekuti zvinhu zvakavimbika sei munzvimbo dzakaoma? A3: Dziviriro yeIP66, zvinhu zvinodzivirira ngura uye chimiro chakagadziridzwa chinodzivirira mamiriro akaipisisa.