Pêşkêşkirina da û Serdemaya Pêşkeftina Sîstema Xana Zevîyandek 252kV Dead Tank SF6 Circuit Breaker

Pêşnûmara

Di salên dawî de, bixebitina rastî yên Nîjeryay da çavkaniya ekonomî û cemalatê dihewî ye. Pergala bixebitina yekparast û ya hêvîyê tirsîlî yên rengîna wekheviyê ji bo derketina we ye. Li ser rêzikên tirsîlî ya hêvîyên 252kV li ser rengîna bixebitina Nîjeryay pêdiviyekî nehat da, û performansa kesanên kêmkerdina ê amadekirineke werzokan û pêvkirinê yên vê rêzikên bixebitina. ABB, wek kompaniya herî pelî yên lêdana malperên elektrîk, kesanên kêmkerdina SF6 ya dead tank 252kV piştgirî kiribû ku bi sistemê arc-quenching chamber ya navber hilbijart, ku ji bo derketina xwesteyên nîkan rengîna bixebitina Nîjeryay ve hatiye şandikirin û certifikasyonê SONCAP wergirt, ku parastîna standardên yekgirtî yên nahiyê.

Rêbaza Sistemê Arc-Quenching Chamber
Rêbaza Dual-Break Series Arc-Quenching

Sistemê arc-quenching chamber ya kesanên kêmkerdina SF6 252kV dead tank bi rêbazê dual-break series were şandin. Di vê rêbazê de, du interrupter pêserdar in û her interrupter were dizayn kirin da 50% ji vê voltageya giştî, ya 126kV, berde. Vê rêbazê nû ji bo kevankirina presyarê dielectric recovery yên wan interrupterên yekane bêtir ne.

Gava ku çavkaniya short-circuit li ser rengîna bixebitina bigere, arka mezin bi baran di kesanên kêmkerdina de were çêkirin. Li ser kesanên kêmkerdina single-break tradîsyonî, voltageya tam 252kV hewce ye ku bi yek interrupterê tevahî were berde dema procesê arc-quenching, ku presyarê bêtir ji bo dielectric recovery ê bikirin. Lakin, di rêbazê dual-break series de, voltageya pêserdar e u diher interrupteran de. Ev nîsa kevankirina stressê elektrîkî ji her interrupter û gelempera waqti yên dielectric recovery. Bunaqa, efektivîteya arc-quenching were zêdetir kirin û riska re-ignition ya arka dema quenchingê werin gelemper kirin.

Bi tenê li ser amadekirina werzekirina pêserdar ê sisteman dual-break series, ABB piramerdî teknolojiyên kontrolê pêserdar voltage yên nasaz kiribû. Capacitors paralel xas be di her dwêrê interrupteran de were saz kirin. Van capacitors bi tevahî were calibririn da voltageya pêserdar diher interrupteran de bi tenê dikare, heta li ser şertên transient fault yên mirçet. Vê mekanizma pêserdar voltage parastîna sistemê arc-quenching chamber bêtir bike.

Strukturê T-Type Piston Pressure Cylinder

Cylinder pressure di sisteman arc-quenching chamber de bi strukturê T-type piston were dizayn kirin, ku partî keyî ye ji bo pêşkêşkirina flowê SF6 gas bi lez. Gava kesanên kêmkerdina command trip bigere, piston T-type dest pê birindan. Dema procesê opening, piston SF6 gas di cylinderan de bi presyarê 1.2MPa were tevniserin.

Procesê tevnisê bi tevahî were kontrol kirin da flowê gas bi lez 600m/s were pêşkêş kirin. Flowê gas bi lez SF6 rola mînayî ye ji bo procesê arc-quenching. Gava arka bigere, flowê gas bi lez dikare plasma arkê çêkerin, jêrîna temperatureya arkê bigerin û particleyan ionized li ser channel arkê were rakirin. Ev prosesê dielectric strength recovery di gap ark-kêmkerdina de zêdetir bike, û kesanên kêmkerdina dikare current fault bi tevahî were kêmkerin û karê arc-quenching were afirandin.

Strukturê T-type piston tenê avantajên structure simple, mechanical strength bêtir û performance sealing bêtir hene. Structure simple li ser manufacturing û maintenance ê cylinder pressure bêtir ne, mechanical strength bêtir dikare piston bi tevahî were dayeke presyar û lezê bi tevahî, û performance sealing bêtir dikare SF6 gas ne hatiye leak bikin, operasyon normal ê kesanên kêmkerdina were parastin û parastina bêtir ê rengîna bixebitina.

Nozzles PTFE-Reinforced Carbon Fiber

Nozzle partî keyî ye di sisteman arc-quenching chamber de, û performansa materialê wekheviyê ji bo service life û performansa arc-quenching ê kesanên kêmkerdina. ABB materialê PTFE-reinforced carbon fiber were hilbijartin ji bo nozzles ê sistemê arc-quenching chamber ya kesanên kêmkerdina SF6 252kV dead tank.

PTFE-reinforced carbon fiber properties bêtir hene wanî yên resistance temperature bêtir, wear resistance û resistance arc-erosion bêtir. Dema procesê arc-quenching, temperature di area arkê de hediye dikare ji 10,000 °C. Resistance temperature bêtir ê PTFE-reinforced carbon fiber nozzle dikare structural integrity û performance stability di şertên hardên bêtir de were parastin.

Li ser resistance arc-erosion, materialê we dikare ji 2000 full-capacity interruptions (50kA) were dayeke, ku cycle maintenance ê kesanên kêmkerdina werin zêdetir kirin. Berbi materialên nozzle tradîsyonî, nozzles PTFE-reinforced carbon fiber service life derbas dikin, frequency maintenance û replacement ê equipment werin kevankirin, û cost total operation û maintenance ê rengîna bixebitina werin kevankirin.

Certification SONCAP û Compliance

Ji bo enter market Nîjeryay, sistemê arc-quenching chamber ya kesanên kêmkerdina SF6 252kV dead tank bi ABB developed wergirt û certification SONCAP bi serkeftin were guhert. Certification SONCAP program assessment çakî ye ji Standard Organization of Nigeria were implement kirin da parastina malperên elektrîk imported meet local standards safety, health û environmental protection.

Dema procesê certification, product ABB test comprehensive di various aspects de, including electrical performance, mechanical performance, safety performance û environmental adaptability. Rêbazê dual-break series arc-quenching, structure T-type piston pressure cylinder û nozzles PTFE-reinforced carbon fiber hemû scrutiny û verification çakî werin dayeke.

Bunaze, di test electrical performance de, performance pêserdar ê system dual-break, ability arc-quenching ê kesanên kêmkerdina li ser different fault currents û characteristics dielectric recovery heme requirements Nîjeryay mete an ji bo exceed werin. Di test mechanical performance de, strength û durability ê structure T-type piston, as well as reliability ê mechanical operation ê kesanên kêmkerdina, heme recognized fully.

Acquisition successful ê certification SONCAP not only proves quality high û reliability ê system ABB's 252kV dead tank SF6 circuit breaker arc-quenching chamber but also provides guarantee solid for application wide în power grid Nîjeryay.

Application in Power Grid Nîjeryay

Kesanên kêmkerdina SF6 252kV dead tank bi system arc-quenching chamber advanced this successfully applied in several key projects transmission power in Nîjeryay. In these projects, kesanên kêmkerdina have shown performance excellent.

During process operation, design dual-break series arc-quenching effectively dealt with multiple faults short-circuit, ensuring isolation rapid ê faults û minimizing impact on power grid. Structure T-type piston pressure cylinder stably generated flow SF6 gas high-speed, enabling kesanên kêmkerdina to complete task arc-quenching within time short. Nozzles PTFE-reinforced carbon fiber also maintained performance good, and no erosion significant or damage occurred even after many operations.

Thanks to reliable operation ê these kesanên kêmkerdina, reliability û stability ê power grid Nîjeryay significantly improved. Outages power caused by failures kesanên kêmkerdina greatly reduced, providing supply power more stable for production industrial û daily lives people in Nîjeryay. At same time, service life long û low maintenance requirements ê kesanên kêmkerdina also reduced costs operation û maintenance ê department power local, which great significance for development sustainable ê industry power Nîjeryay.

Conclusion

Design ê system arc-quenching chamber kesanên kêmkerdina SF6 252kV dead tank by ABB, with its innovative dual-break series arc-quenching, structure T-type piston pressure cylinder, û nozzles PTFE-reinforced carbon fiber, provides solution excellent for transmission power high-voltage Nîjeryay. Obtaining certification SONCAP ensures compliance with local standards, û application successful in power grid Nîjeryay has verified reliability high û performance excellent. This case design not only meets needs current ê development power grid Nîjeryay but also provides experience valuable û reference for design û application ê similar kesanên kêmkerdina high-voltage in other regions. In future, ABB will continue optimize û improve technology this to contribute more to development ê industry power global.