Zambiri za ogwiritsa ntchito
Kampani yogudubuza zitsulo imapanga zitsulo zozungulira zotentha zozungulira zomwe zili ndi 16mm ~ φ150mm.Gawo lamagetsi lamagetsi amakampani limayendetsedwa ndi mota ya DC ndipo ili ndi ma transformer awiri a 3150KVA.Chithunzi cha dongosolo lamagetsi ndi motere:
Zomwe zimagwira ntchito
Mphamvu yapakati pa 3150KVA DC brushless mota ndi PF = 0.75, yomwe ikugwira ntchito ndi 2650A, kugunda kwakukulu kwapano ndi ka 5, ka 7, ndipo kutembenuka kwapano ndi 19.5%.
Power System Analysis
Katundu wamkulu wa DC brushless motor ballast ndi 6 single-pulse ballasts.Zida za ballast zimapanga kuchuluka kwamphamvu kwamphamvu pakuchita kwa AC, AC, ndi DC.Ndi gwero la pulse panopa.Ikalowetsedwa mu gridi yamagetsi, mphamvu yamagetsi yamagetsi Kuthamanga kwamagetsi komwe kumagwira ntchito kumayambitsidwa ndi vuto la netiweki yamagetsi, zomwe zimapangitsa kuti magetsi azigwira ntchito komanso apano, zomwe zimayika pachiwopsezo chachitetezo chamtundu ndi magwiridwe antchito. za magetsi osinthira, kumawonjezera kutayika kwa mzere ndi kupatuka kwamagetsi ogwirira ntchito, ndipo kumawononga maukonde amagetsi ndi zida zamagetsi zokha.
Sefa dongosolo lothandizira chipukuta misozi
Zolinga zaulamuliro
Mapangidwe a zida zolipirira zosefera amakwaniritsa zofunikira pakuponderezedwa kwa ma harmonic ndi kasamalidwe kamphamvu koletsa mphamvu.
Pansi pa makina ogwiritsira ntchito a 0.4KV, zida zolipirira zosefera zitayamba kugwira ntchito, kugunda kwamagetsi kumaponderezedwa, ndipo mphamvu yapakati pamwezi imakhala pafupifupi 0.92.
High-order harmonic resonance, resonance overvoltage, ndi overcurrent chifukwa cholumikizana ndi fyuluta compensation nthambi dera sizidzachitika.
Mapangidwe Amatsatira Miyezo
Ubwino wa mphamvu Public gululi harmonics GB/T14519-1993
Kusinthasintha kwamphamvu kwa Voltage ndi kusinthasintha kwa GB12326-2000
General mikhalidwe luso otsika-voteji zotakasika mphamvu chipukuta misozi chipangizo GB/T 15576-1995
Chipangizo cholipirira magetsi otsika-voltage JB/T 7115-1993
Chiwongola dzanja champhamvu chaukadaulo JB/T9663-1999 "Low-voltage reactive power automatic compensation controller" High-order harmonic panopa malire mtengo kuchokera ku low-voltage power and electronic equipment GB/T17625.7-1998
Electrotechnical mawu Mphamvu capacitors GB/T 2900.16-1996
Low voteji shunt capacitor GB/T 3983.1-1989
Mphamvu ya GB10229-88
Mphamvu ya IEC 289-88
Low-voltage reactive power compensation controller order mikhalidwe DL/T597-1996
Low-voltage magetsi mpanda chitetezo kalasi GB5013.1-1997
Low-voltage wathunthu switchgear ndi kulamulira zida GB7251.1-1997
Malingaliro opangira
Malingana ndi momwe kampaniyo ikukhalira, ndondomeko yobwezera mphamvu zowonongeka kwa DC brushless motor fyuluta yapangidwa poganizira za katundu wamagetsi ndi kuponderezedwa kwa pulse panopa, ndi seti ya fyuluta yotsika-voltage reactive power compensation imayikidwa pansi pa 0.4kV. voltage mbali ya thiransifoma, kupondereza kugunda kwapano, ndikubweza katundu wokhazikika, ndikuwongolera mphamvu yamagetsi.The ballast imapanga 6K-1 pulse current popanga brushless DC motor, ndipo imagwiritsa ntchito cascaded current kuti isungunuke, ndipo yosungunuka ili pafupi 5250Hz ndi 7350Hz.Chifukwa chake, chiwongola dzanja chosinthira mphamvu zosefera ziyenera kupangidwira 250Hz, 350Hz ndi ma frequency ena kuti zitsimikizire kuti gawo lolipirira zosefera limatha kusefa bwino mphamvu yakutulutsa mphamvu, kuwongolera mphamvu, ndikupangitsa kuti kugunda kwamagetsi kugwirizane ndi GB/T3. .
ntchito yopanga
Mphamvu zonse za thiransifoma ya 3150KVA zimalipidwa kuchokera pa 0.72 kufika pafupifupi 0.95.Zida zolipirira zosefera ziyenera kukhazikitsidwa ndi 2100KVar, ndipo zimagawidwa m'magulu 6 a masiwichi owongolera kuti athe kubweza mafunde apansi apansi a thiransifoma, ndikusintha voliyumu ku 95KVAR, poganizira zofunikira zamphamvu za mzere wopanga.
Kusanthula zotsatira pambuyo kukhazikitsa chipukuta misozi
Mu Epulo 2011, chipangizo cha DC motor filter reactive power compensation chidayikidwa ndikuyamba kugwira ntchito.Chipangizochi chimangotsata kusintha kwagalimoto ya DC, ndikusefa ma harmonics apamwamba kwambiri kuti alipire mphamvu yogwira ntchito ndikuwongolera mphamvu yamagetsi.zambiri monga izi:
Chithunzi chogawa cha Harmonic spectrum
Lowetsani Waveform
Chida cholipirira chikagwiritsidwa ntchito, mphamvu yosinthira mphamvu imakhala pafupifupi 0.98 (gawo lokwera limakhala pafupifupi 0.7 pomwe chida cholipirira chosefera chimachotsedwa)
Katundu ntchito
Mphamvu ya 3150KVA transformer ili pamwamba pa 0.95, 5th harmonic imachepetsedwa kuchokera ku 510A mpaka 102A, 7th harmonic imachepetsedwa kuchokera ku 300A kufika ku 60A, ndipo zomwe zimagwiritsidwa ntchito panopa zimachepetsedwa kuchokera ku 2650A mpaka 2050A, dontho la 23%.Pambuyo pa chipukuta misozi, mtengo wochepetsera kutaya mphamvu ndi WT=△Pd*(S1/S2)2*τ*[1-(cosφ1/cosφ2)2]=35×{(0.72×3150)/3150}2×0.66≈33 (kw h) Muchilinganizo, Pd ndikutayika kwafupipafupi kwa thiransifoma, yomwe ndi 35KW, ndipo kupulumutsa ndalama zamagetsi pachaka ndi 33 * 20 * 30 * 10 * 0.7 * 2 = 280,000 yuan (kutengera ntchito 20). maola tsiku, masiku 30 pamwezi, ndi miyezi 10 pachaka, 0.7 yuan pa kilowati-ola yamagetsi;chifukwa cha kuchepa kwa ma harmonics, bilu yamagetsi yopulumutsidwa: Kutayika kwa thiransifoma chifukwa cha mphamvu ya harmonic ndiko makamaka kuonjezera kutaya kwa ferromagnetic ndi kutaya kwa mkuwa.Kutayika kwa ferromagnetic kumagwirizana ndi mphamvu yachitatu yama frequency apano a harmonic.Engineering Nthawi zambiri, 2% ~ 5% amatengedwa.Pakuwongolera katundu, 2% imatengedwa, ndiko kuti, WS = 4300 * 6000 * 0.7 * 0.03≈360,000 yuan, ndiko kuti, kupulumutsa pachaka kwa ndalama zamagetsi ndi 28 + 36 = 64 (10,000 yuan).
mphamvu factor situation
Ufulu wonse wa kampaniyo wakwera kuchokera pa 0.72 mpaka 0.95, ufulu wa mwezi uliwonse wakhalabe pa 0.96-0.98, ndipo malipiro a mwezi uliwonse achokera ku yuan 100,000 mpaka 15,000 yuan.
Kulipiridwa kwamagetsi kwa DC motor motor low-voltage reactive power kumatha kupondereza kugunda kwapano ndikulipiritsa mphamvu zamagetsi, kuthetsa vuto lachiwongolero chamagetsi, kukulitsa mphamvu ya chosinthira, kuchepetsa kutayika kwa chipukuta misozi, kukulitsa zotuluka, ndi kupereka Kampaniyo yatulutsa phindu lalikulu lazachuma, ndipo kasitomala wapeza ndalama za polojekitiyi kwa nthawi yosakwana chaka chimodzi.Chifukwa chake, kampaniyo ndiyokhutitsidwa kwambiri ndi chipukuta misozi chamagetsi cha brushless DC motor, ndipo iwonetsa makasitomala ena mtsogolo.
Nthawi yotumiza: Apr-14-2023