Kufotokozera mwachidule za kuchotsera kwanzeru kwa harmonic ndi arc kupondereza chipangizo:
M'makina aku China a 3 ~ 35KV magetsi ndi kugawa, ambiri aiwo ndi machitidwe osalowerera ndale.Malinga ndi makampani amakampani athu, pakakhazikika gawo limodzi, dongosololi limaloledwa kugwira ntchito molakwika kwa maola awiri, zomwe zimachepetsa kwambiri ndalama zoyendetsera ntchito ndikuwongolera kudalirika kwamagetsi ndi kugawa.Komabe, chifukwa cha kuwonjezereka kwapang'onopang'ono kwa mphamvu zamagetsi zamagetsi, njira yoperekera mphamvu yasintha pang'onopang'ono kuchokera ku mizere yapamwamba kupita ku mizere ya chingwe, ndipo mphamvu yamakono ya dongosolo mpaka pansi idzakhala yaikulu kwambiri.Pamene dongosololi limapanga maziko amodzi, arc yopangidwa ndi capacitor yowonjezera panopa sizovuta kuzimitsidwa, ndipo ikhoza kukhala chipangizo chokhazikika cha arc.Panthawiyi, kuchulukitsitsa kwa chipangizo cha arc grounding ndi ferromagnetic series resonance overvoltage chifukwa cha izo zidzaika pangozi ntchito yotetezeka ya gridi yamagetsi.Kuchulukirachulukira kwa gawo limodzi la arc arc stationing chipangizo ndikovuta kwambiri, ndipo gawo lazowopsa la gawo la overvoltage limafika nthawi 3-3.5 za voteji yanthawi zonse.Ngati kuwonjezereka kwakukulu kotereku kumagwira pa gululi kwa maola angapo, ndithudi kuwononga kutsekemera kwa zipangizo zamagetsi.Pambuyo pakuwunjika kwa zida zamagetsi ndikuwonongeka kwanthawi zambiri, kufooka kwa insulation kumapangidwa, zomwe zimapangitsa kuti pakhale kusweka komanso kukhazikika, zomwe zimapangitsa kuti pakhale ngozi yamitundu iwiri.Kuphatikiza apo, zipangitsanso ngozi zachitetezo monga kuwonongeka kwa zida zamagetsi (makamaka kuphulika kwa ma motor insulation), kuphulika kwa chingwe, voltage transformer saturation state excitation regulator kuwotcha PT, ndi kuphulika kwa zinc oxide arrester.Kuti athetse vuto la overvoltage lomwe limayambitsidwa ndi chipangizo chamagetsi chanthawi yayitali cha arc, cholumikizira cha arc chimagwiritsidwa ntchito kubweza zomwe zikuchitika pagawo losalowerera ndale, ndipo kuchitika kwa arc yamba yamagetsi kumaponderezedwa.Cholinga cha njirayi ndikuchotsa kuwala kwamagetsi.Komabe, chifukwa cha makhalidwe ambiri a arc kupondereza koyilo palokha, n'zosatheka kubweza bwino capacitive panopa, makamaka kuwonongeka chifukwa mkulu pafupipafupi zigawo zikuluzikulu kwa magetsi sangathe kuthetsedwa.Pamaziko ophunzirira mphete zopondereza za arc, kampani yathu yapanga chipangizo cha HYXHX intelligent arc suppression.
Mfundo yogwiritsira ntchito chipangizo chanzeru cha arc kupondereza:
1. Pamene dongosolo likugwira ntchito bwino, gulu lolamulira la makompyuta la ZK la chipangizocho limapitirizabe kuyang'anira chizindikiro chamagetsi chopangidwa ndi voltage transformer PT;
2. Pamene mphamvu yogwira ntchito ya katatu yachiwiri yotsogolera ya voltage transformer imasintha kuchoka pa kusiyana kocheperako kupita ku kuthekera kwakukulu, zikutanthauza kuti pulogalamu ya pulogalamuyo ndi yolakwika.Panthawi imeneyi, microcomputer kulamulira bolodi ZK akuyamba yomweyo, ndipo nthawi yomweyo amaweruza cholakwika mtundu ndi kusiyana gawo malinga ndi kusintha kwa PT yachiwiri linanena bungwe chizindikiro Ua, Ub ndi Uc:
a.Ngati gawo limodzi la PT lasweka, wolamulira wa microcomputer ZK adzawonetsa kusiyana kwa mzere wosweka ndi chizindikiro cha mzere wosweka, ndikutulutsa chizindikiro cholumikizira cholumikizira nthawi yomweyo;
b.Ngati ndi vuto lachitsulo, gulu lowongolera la microcomputer ZK limawonetsa malo omwe ali ndi vuto ndi chizindikiro choyambira, ndipo imatulutsa chizindikiro chongokhudza nthawi yomweyo.Malinga ndi zofunikira zapadera za wosuta, angathenso kupereka kutseka kanthu lamulo kwa zingalowe contactor JZ mu nduna, amene akhoza kwambiri kuchepetsa kukhudzana voteji ndi sitepe voteji, ndi yabwino kuonetsetsa chitetezo munthu;
c.Ngati ndi vuto la arc, gulu lolamulira la microcomputer ZK lidzawonetsa gawo lolakwika pansi ndi chizindikiro chapansi, ndipo nthawi yomweyo tumizani lamulo lotseka ku gawo lolakwika la vacuum contactor JZ, ndi AC contactor yomweyo kutseka arc The pansi amasinthidwa kukhala zitsulo pansi.Chifukwa cha kupanikizika kwa arc yamagetsi kumbali zonse ziwiri, arc yamagetsi yapansi imatsika mpaka zero nthawi yomweyo, ndipo arc yamagetsi imazimitsidwa.Ngati ntchito gululi wolamulidwa ndi mizere kufala, ndi zingalowe contactor JZ zida adzakhala basi kutseka pambuyo 5 masekondi ntchito.Ngati ndi kulephera kwachangu nthawi yomweyo, dongosololi lidzachira.Ngati ndi vuto lokhazikika, lipitiliza kugwira ntchito ndikuthandizira kuchepetsa kuchulukirachulukira kosatha.Ndipo linanena bungwe passiv lophimba kukhudzana chizindikiro;
d.Ngati chipangizocho chili ndi ntchito yosankha yokha, pamene voteji yothandizira yachiwiri yotsegula katatu u ya thiransifoma PT imasintha kuchoka ku mphamvu yochepa kupita ku kuthekera kwakukulu, gawo laling'ono lamakono losankha maziko nthawi yomweyo limasonkhanitsa zero-gawo panopa pa mzere uliwonse, ndipo pamene pali palibe gawo limodzi lokhazikika Pankhani yachitsulo chachitsulo chomwe sichikhoza kubwezeretsedwa bwino, sankhani mzere wolakwika molingana ndi matalikidwe a zero-gawo panopa la mzere.Mzere wolakwika umasankhidwa molingana ndi mfundo ya kusintha kwakukulu musanayambe komanso pambuyo pa arc yozimitsa.
Zofunikira zazikulu za chipangizo chanzeru cha arc kupondereza:
1. Chipangizochi chimayenda mofulumira ndipo chimatha kuthamanga mkati mwa 30 mpaka 40 milliseconds, zomwe zimafupikitsa kwambiri nthawi ya arc ya gawo limodzi;
2. Arc imatha kuzimitsidwa chipangizocho chitangotha kuthamanga, ndikuchepetsa mphamvu ya arc grounding overvoltage mkati mwamitundu yamagetsi yapaintaneti.
3. Pambuyo pa kugwiritsira ntchito chipangizocho, lolani kuti mphamvu yamakono ya dongosolo ipitirire mosalekeza kwa maola awiri, ndipo wogwiritsa ntchito akhoza kuthana ndi mzere wolakwika atamaliza ntchito yosuntha katundu.
4. Ntchito yachitetezo cha zida sizimakhudzidwa ndi kukula ndi mawonekedwe a gridi yamagetsi;
5. Chipangizocho ndi chotsika mtengo.Ma voliyumu osinthira magetsi amatha kupereka ma siginecha amagetsi a metering ndi chitetezo, m'malo mwa makabati achikhalidwe osinthira magetsi.
6. Chipangizochi chili ndi kachipangizo kakang'ono kamene kamasankha mzere wapansi, womwe ukhoza kusintha kwambiri kulondola kwa kusankha kwa mzere pogwiritsa ntchito zizindikiro za kusintha kwakukulu kwa zero-sequence current ya mzere wolakwika isanayambe komanso itatha arc kuzimitsa.
7. Chipangizocho chimatengera kuphatikiza kwa odana ndi machulukitsidwe voteji thiransifoma ndi wapadera pulayimale panopa malire harmonic choletsa, amene makamaka suppresses ferromagnetic resonance ndi bwino kuteteza PT.
8. Chida ichi chili ndi ntchito yolemba zolakwika wamba za chipangizo chamagetsi cha arc grounding, ndipo zimapereka deta kwa makasitomala kuti afufuze ngozi za chitetezo.
Ntchito zoyambira zanzeru za arc kupondereza ndi chida chochotsera ma harmonic:
1. Pamene chipangizochi chikugwira ntchito bwino, chimakhala ndi ntchito ya PT cabinet
2. Pa nthawi yomweyi, ili ndi ntchito ya alamu yochotsa dongosolo ndi loko;
3. System zitsulo pansi vuto Alamu, kutengerapo dongosolo pansi mfundo zolakwa ntchito;
4. Chotsani arc maziko chipangizo, dongosolo mapulogalamu mndandanda resonance ntchito;voteji pansi ndi overvoltage alarm ntchito;
5. Imakhala ndi ntchito zojambulira zidziwitso monga nthawi yochotsa ma alarm, nthawi yolakwika, gawo lolakwika, voteji yamagetsi, voltage yotseguka ya delta, capacitor ground current, etc., yomwe ili yabwino kuwongolera zolakwika ndi kusanthula;
6. Pamene dongosolo mapulogalamu ali ndi gawo limodzi grounding kulakwitsa, chipangizo nthawi yomweyo kugwirizana cholakwa pansi mkati za 30ms kudzera wapadera gawo-kugawanika zingalowe contactor.The grounding overvoltage ndi okhazikika pa gawo voteji mlingo, amene angathe kuteteza awiri mitundu yochepa dera vuto chifukwa cha gawo limodzi grounding ndi nthaka okusayidi arrester kuphulika chifukwa cha arc grounding overvoltage.
7. Ngati chitsulocho chili pansi, magetsi okhudzana ndi magetsi amatha kuchepetsedwa kwambiri, zomwe zimathandiza kuonetsetsa kuti chitetezo cha munthu chitetezeke (chitsulo chokhazikika chikhoza kukhazikitsidwa ngati chipangizocho chikugwira ntchito malinga ndi zofunikira za wogwiritsa ntchito);
8. Ngati ntchito gululi mphamvu makamaka wopangidwa ndi mizere pamwamba, zingalowe contactor adzakhala basi kutseka pambuyo 5 masekondi ntchito chipangizo.Ngati kulephera kwakanthawi, dongosololi lidzabwerera mwakale.Pakachitika kulephera kosatha, chipangizocho chidzagwiranso ntchito kuti chichepetse kupitirira kwanthawi zonse.
9. Pamene vuto la PT disconnection likuchitika m'dongosolo, chipangizochi chidzawonetsa kusiyana kwa gawo la vuto la kuchotsedwa ndikutulutsa chizindikiro cholumikizira nthawi yomweyo, kotero kuti wogwiritsa ntchito akhoza kutseka modalirika chipangizo chotetezera chomwe chingalephereke chifukwa cha kuchotsedwa kwa PT. .
10. Ukadaulo wapadera wa chipangizocho wa "intelligent socket (PTK)" ukhoza kuletsa kumveka kwa ferromagnetic resonance, ndikuteteza bwino platinamu kuti isapse, kuphulika ndi ngozi zina zomwe zimachitika chifukwa cha kumveka kwadongosolo.
11. Chipangizocho chili ndi socket ya RS485, ndipo imagwiritsa ntchito protocol yolumikizirana ya MODBUS kuti iwonetsetse kuti chipangizocho chimagwirizana ndi makina onse owonera makanema, ndikusunga ntchito zotumizira deta ndi kuwongolera kutali.
Ntchito zowonjezera za kuponderezedwa kwa arc wanzeru ndi chida chochotsera ma harmonic:
1. Ntchito yosankha yokha imatha kukhazikitsidwa malinga ndi zomwe wogwiritsa ntchito akufuna
2. Chipangizo chaching'ono cha HYLX chamakono chosankha mzere wapansi wopangidwa ndi kampani yathu makamaka chimasankha mzerewo molingana ndi matalikidwe a zero-sequence panopa pamene dongosolo lakhazikitsidwa.Imagonjetsa kuipa kwa kulondola kochepa kwa mzere wosankha pamene liwiro la mzere wosankhira liri pang'onopang'ono ndipo arc imakhazikika pa chipangizo chosankhidwa mwachizolowezi.
3. Ntchito yochotsa (kuchotsa) resonance (kugwedezeka) ikhoza kukhazikitsidwa malinga ndi zofunikira za wogwiritsa ntchito;
4. Transformer yapadera yolimbana ndi machulukitsidwe amagetsi yopangidwa ndi kampani yathu imatha kukonzedwa kuti igwirizane ndi choletsa champhamvu chamakono, chomwe chimawononga kwambiri mawonekedwe a ferromagnetic resonance ndikupewa "kuwotcha platinamu" ndi "kuphulika kwachitetezo cha platinamu" komwe kumachitika chifukwa cha ngozi ya resonance overvoltage. .
5. Microcomputer harmonic kuthetsa chipangizo angathenso kukhazikitsidwa malinga ndi zofuna za wosuta kuthetsa ferromagnetic resonance.
Nthawi yotumiza: Apr-13-2023