Mistari ya mzunguko yanayoweza kusafiri na kuinstalishwa haraka na rahisi katika maeneo tofauti ni aina ya mifumo ya kubadilisha umeme. Zinatumika kutoa huduma ya muda ghafla au dharura kwenye eneo ambalo grid haijawahi kutumika au limeharibika, kama vile mahali pa kujenga, maeneo yenye uharibifu, maeneo magamba, au mapambano. Zinaweza pia kutumika kutekeleza, kudhibiti, au kurudisha mistari zinazopo, au kukabiliana na chombo chenye umeme wa kutokana na viwango.
Mistari ya mzunguko yanayoaweza kusafiri yana sehemu mbalimbali zilizowekwa kwenye trailer, skidi, au konteyner ambayo inaweza kusafirishwa kwa njia ya barabara, tarehe, bahari, au hewa. Sehemu muhimu ni:
Transformer unayobadilisha voltage chanya kwa voltage dogo au upande mwingine, kulingana na matumizi.
Mfumo wa kupaza unayohakikisha kwamba transformer haingefunika sana na ukimya.
High-voltage switchgear anayohakikisha na kudhibiti circuit ya high-voltage na kununguza mobile substation kwenye transmission line au generator.
Low-voltage switchgear anayohakikisha na kudhibiti circuit ya low-voltage na kukabiliana na umeme kwenye load au grid.
Mfumo wa kutathmini unayomithibitisha na kurekodi parameta za umeme kama voltage, current, power, frequency, ndc.
Mfumo wa protection relaying unayopata na kutengeneza vito na kuhakikisha kwamba vyombo vilivyotumiwa na watu hawatupwe.
AC and DC auxiliary power supply unayotoa umeme kwa ajili ya utaratibu wa mobile substation na zile zinazotumika pamoja nayo kama vile madada, mafan, pompa, ndc.
Surge protection system unayolinda mobile substation kutoka strikes za lightning na voltage surges nyingine.
Cable connecting system unayokabiliana mobile substation kwenye chanzo cha umeme na load kwa kutumia cables na connectors flexible.
Mistari ya mzunguko yanayoweza kusafiri yameundwa kufikisha mahitaji ya kila mtumiaji na matumizi. Wanaweza kuwa na voltage levels tofauti, power ratings, configurations, features, na accessories. Yameundwa pia ili kufuata sheria za barabara za taifa na federal, kama vile grid code na safety standards.
Mistari ya mzunguko yanayoweza kusafiri yanatoa faides kadhaa zaidi ya substations zinazopo, kama vile:
Ukuaji: Mistari ya mzunguko yanayoweza kusafiri zinaweza kusafirishwa na kurudisha kwa urahisi na haraka kwenye chochote ambako zinahitajika. Hazitoshi special permits au civil works kwa usimamizi. Zinaweza pia kurudi au kurudisha kwa sababu ya mikono ya umeme au vyombo vilivyopo.
Uwezo wa kubadilisha: Mistari ya mzunguko yanayoweza kusafiri zinaweza kubadilishwa kwa voltage levels tofauti, power ratings, configurations, features, na accessories kulingana na mahitaji na mapendeleo ya mtumiaji. Zinaweza pia kutumia multiple voltages kwa loads tofauti au services mara moja.
Uaminifu: Mistari ya mzunguko yanayoweza kusafiri ni units ready-to-connect zinazojitahidi kwa umeme wa kasi na performance. Zina equipped na state-of-the-art equipment na advanced control, protection, na communication systems zinazoruhusu local na remote monitoring na control. Pia zina backup systems na redundancy features zinazobora availability na resilience.
Ushindi: Mistari ya mzunguko yanayoweza kusafiri ni suluhisho la biashara zinazosaidia wateja kutumia muda na pesa. Zinapunguza capital expenditure (CAPEX) kwa kumeza construction costs na land acquisition costs. Pia zinapunguza operational expenditure (OPEX) kwa kumeza maintenance costs na energy losses. Zinaweza pia kutengeneza revenue kwa kuuza umeme wa zaidi kwenye grid au wateja wengine.
Mistari ya mzunguko yanayoweza kusafiri zinaweza kutumika kwa maana nyingi katika sectors tofauti, kama vile:
Utility solutions: Mistari ya mzunguko yanayoweza kusafiri zinaweza kutumika kutoa umeme wakati wa emergencies au planned outages zinazotokana na natural disasters, accidents, maintenance, upgrades, au expansions za substations zinazopo. Zinaweza pia kutumika kutoa umeme wa muda ghafla wakati wa peak demand periods au load-shedding events. Zinaweza pia kusaidia stability na reliability ya grid kwa kutumia reactive power compensation, voltage regulation, frequency control, ndc.
Renewables integration: Mistari ya mzunguko yanayoweza kusafiri zinaweza kutengeneza interconnection points kwa wind farms, solar plants, hydro plants, biomass plants, ndc. Zinaweza pia kutumika kutoa grid support services kama voltage regulation, frequency control, power quality improvement, ndc.
Smart grid and urban substations: Mistari ya mzunguko yanayoweza kusafiri zinaweza kusaidia smart grid development kwa kutumia distributed generation, microgrid operation, demand response management, energy storage integration, ndc. Zinaweza pia kutumika kwa compact na low-noise solutions kwa maeneo ya miji ambako space ni chache na environmental concerns ni juu.
Datacenter electrification: Mistari ya mzunguko yanayoweza kusafiri zinaweza kutumika kutoa umeme wa amani na asili kwa data centers ambazo hazitaki high availability.
Industrial power supply systems: Mistari ya mzunguko yanayoweza kusafiri zinaweza kutumika kutoa umeme wa amani na asili kwa industrial plants ambazo hazitaki high power quality, availability, na efficiency. Zinaweza pia kutumika kutoa backup power au load sharing kwa processes critical, kama vile oil and gas production, mining operations, chemical plants, ndc. Zinaweza pia kusaidia plant electrification projects, kutoka feasibility studies hadi start-ups, kwa kutumia umeme wa muda ghafla wakati wa construction au commissioning phases.
Shore-to-ship power: Mistari ya mzunguko yanayoweza kusafiri zinaweza kutumika kutoa umeme wa mazingira mzuri kwa ships docked at ports au harbors, kwa kutumia grid lokalau renewable energy sources. Hii inaweza kumeza emissions na noise kutoka engines na generators za ship, na kuboresha air quality na mazingira kwa port na communities karibu.
Mistari ya mzunguko yanayoweza kusafiri zinaweza kutambuliwa kwa aina tofauti kulingana na mtaala, ukubwa, na features. Baadhi ya aina za za nyinyi ni:
Compact and modular mobile substations: Hizi ni mistari ya mzunguko yanayoweza kusafiri zinazo na mtaala compact na modular, ambayo inaruhusu easy mobility na fast relocation bila haja ya special transport permits. Zime weka kwenye trailers au skids ambazo zinaweza kusafirishwa na trucks au vehicles mingine. Zinaweza pia kurudi au kurudisha kwa sababu ya mikono ya umeme au vyombo vilivyopo. Zinazozingatia ni applications ambazo hazitaki high flexibility na rapid deployments, kama vile emergency service, new service, au temporary service.
Skid-mounted substations: Hizi ni mistari ya mzunguko yanayoweza kusafiri zinazo na mtaala skid-mounted, ambayo inaruhusu fast na easy deployment, kumeza civil works kama vile installation na commissioning efforts on site. Zime weka kwenye skids ambazo zinaweza kutumika na cranes au forklifts na kuweka kwenye surface flat. Zinazozingatia ni applications ambazo hazitaki high reliability na low maintenance, kama vile industrial power supply systems, renewables integration, au smart grid and urban substations.
Containerized substations: Hizi ni mistari ya mzunguko yanayoweza kusafiri zinazo na mtaala containerized, ambayo hutumia shelter na protection kwa components na accessories. Zime weka kwenye containers ambazo zinaweza kutumika kwa barabara, tarehe, bahari, au hewa. Zinazozingatia ni applications ambazo hazitaki high durability na resilience katika environmental conditions changamoto, kama vile extreme temperatures, humidity, pollution, ndc.
Rail-wagon substations: Hizi ni mistari ya mzunguko yanayoweza kusafiri zinazo na mtaala rail-wagon, ambayo inaruhusu kutumika kwa railways. Zime weka kwenye rail wagons ambazo zinaweza kutumika na locomotives au rail wagons mingine. Zinazozingatia ni applications ambazo hazitaki high mobility na accessibility katika maeneo magamba au terrains changamoto.
Mistari ya mzunguko yanayoweza kusafiri yanapaswa kufuata maslahi mengi ya mtaala ili kuhakikisha functionality, performance, safety, na environmental compatibility. Baadhi ya maslahi muhimu ni:
Transformer: Transformer ni component muhimu wa mobile substation ambaye unabadilisha voltage chanya kwa voltage dogo au upande mwingine. Transformer lazima ufanyike kwa ubora wa ukubwa na uzito wake kwa transportability na electrical parameters required. Transformer lazima awe na hybrid Nomex insulation system kwa ratings zisizozui (>20 MVA) au cellulose insulation system kwa ratings zisizodogo (<20 MVA). Transformer lazima awe na impedance chanya (hadina 30%) ili kumeza ukubwa na uzito wake, lakini hii inaweza kuharibi voltage regulation na losses. Transformer lazima awe na sound level chache (<65 dB) ili kufuata environmental standards. Transformer lazima awe na multiple voltages (hadina 5) ili kutumia flexibility na versatility kwa matumizi tofauti. Transformer lazima awe na external de-energized switches kwa star-delta re-connection.
Cooling system: Cooling system ni component wa mobile substation ambaye unahakikisha temperature ya transformer na kukuzuia overheating. Cooling system lazima ufanyike kwa kufuta heat produced na load losses na auxiliary cooling losses za transformer. Cooling system lazima awe na aluminum cooling system kwa uzito reduction. Cooling system lazima awe na forced-air cooling system (ONAF) au forced-oil forced-air cooling system (OFAF) kwa ratings zisizozui (>20 MVA) au natural-air cooling system (ONAN) au natural-oil natural-air cooling system (ONAN) kwa ratings zisizodogo (<20 MVA).
High voltage switchgear: High voltage switchgear ni component wa mobile substation ambaye unahakikisha na kudhibiti circuit ya high voltage na kununguza mobile substation kwenye transmission line au generator. High-voltage switchgear lazima ufanyike kufuata voltage class (hadina 420 kV) na interrupt.
Low voltage switchgear: Low voltage switchgear ni component wa mobile substation ambaye unahakikisha na kudhibiti circuit ya low voltage na kutumia umeme kwenye load au grid. Low-voltage switchgear lazima ufanyike kufuata voltage class (hadina 1 kV) na current rating (hadina 2000 A) ya application. Low voltage switchgear lazima awe na components tofauti, kama vile low voltage switches, earth leakage circuit breakers, HRC fuses, electrical isolators, air circuit breakers (ACB), molded case circuit breakers (MCCB), na miniature circuit breakers (MCB). Low voltage switchgear lazima awe na mountings tofauti, kama vile chassis, DIN rail, panel, au 19″ rack mounted. Low-voltage switchgear lazima awe na enclosures tofauti, kama vile open-frame, enclosed, au IP-rated.
Metering system: Metering system ni component wa mobile substation ambaye unamithibitisha na kurekodi electrical parameters za power flow, kama vile voltage, current, power, frequency, ndc. Metering system lazima ufanyike kutoa accurate na reliable data kwa monitoring na billing purposes. Metering system lazima awe na types tofauti za meters, kama vile analog meters, digital meters, smart meters, ndc. Metering system lazima awe na modes tofauti za communication, kama vile wired au wireless, local au remote, ndc.
Protection relaying system: Protection relaying system ni component wa mobile substation ambaye unapata na kutengeneza vito na kuhakikisha kwamba vyombo vilivyotumiwa na watu hawatupwe. Protection relaying system lazima ufanyike kutoa fast na selective tripping ya faulty circuit au vyombo. Protection relaying system lazima awe na types tofauti za relays, kama vile electromechanical relays, solid-state relays, microprocessor-based relays, ndc. Protection relaying system lazima awe na protection functions tofauti, kama vile overcurrent protection, overvoltage protection, differential protection, distance protection, ndc.
AC and DC auxiliary power supply: AC and DC auxiliary power supply ni component wa mobile substation ambaye unatoa umeme kwa utaratibu wa mobile substation na zile zinazotumika pamoja nayo, kama vile madada, mafan, pompa, ndc. AC and DC auxiliary power supply lazima ufanyike kutoa stable na sufficient power kwa load required. AC and DC auxiliary power supply lazima awe na sources tofauti, kama vile batteries, generators, converters, inverters, ndc. AC and DC auxiliary power supply lazima awe na voltages tofauti na frequencies, kulingana na application.
Surge protection system: Surge protection system ni component wa mobile substation ambaye
