Daga cewa kan gyara manyan aiki na ɗaya da ɗaya na maƙashe gida na karamin magana na 35kV a makarantun karamin magana na 110kV a Luliang Oilfield

I. Mafiyanar Gaji na Harmattan

Akaa mai ziyarta ta 35kV na gajin karkashin 110kV a Luliang Oilfield, da aka fara a shekarar 2002, ya zama mafi girma a cikin fannin mai ziyarta. ZN23-40.5/1600 vacuum circuit breakers na farko, da suka samu spring operating mechanisms, sun yi abubuwa masu yawa a lokacin harshen harmattan. Da mutane masu 200 zuwa duka da linkage mechanical na 12-stage, an yi amfani da spring mechanisms wadanda suka ci gari da lafiya a wurare da kayayyakin saukarwarra. A tsari -40°C, lubricants suka zama daidai, wanda ya jawo bearings - a lokacin yakin tsohon rani, incoming line breaker na 3 ta kasance ba za a iya kawo shi ne a lokacin harshe 4 hours, wanda ya haɗa muna a yi aiki a cikin gajin da suke da electric heaters don in ba shi da wahala.

II. The Permanent Magnet Circuit Breaker Transformation

A matsayin babban malami na tekunoloji a shekarar 2010, na baki a cikin ƙungiyar 35kV switchgear renovation project da Xinjiang Oilfield Company ta fara. YWL-12 permanent magnet circuit breaker design - "bistable permanent magnet mechanism + intelligent controller" - ya yi jagoranci dalilin muni:

(A) Technological Breakthrough: From Mechanical to Magnetic Control

• Principle of Permanent Magnet Mechanism: A lab simulations, muna neman cewa pulse DC na 220V ta haɗa closing coil, inda electromagnetic da permanent magnetic fields suka haɗa don bayar 1,800N na driving force, da take bayar contact spring energy storage a lokacin 15ms. Don tripping, electromagnetic field na gaba ta rage holding force, ta ƙara opening spring ta haɗa contacts apart a 2.8m/s. Wannan "electromagnetic trigger + permanent magnet retention" design ta fi shi da zaruratun motors na energy storage da linkages masu yawa na spring mechanisms.

• Emergency Design Feature: Manual tripping device ta bace muna da takaitaccen fahimta - da take so kuɗi 12N·m torque don a yi, ta shafi speeds na electric tripping a lokacin tsari -30°C, wanda ake shirya a lokacin field trials.

(B) On-Site Application Outcomes

• Cold Resistance Verification: A lokacin ƙarin harmattan na 2011, muna yi 100 consecutive operations a tsari -38°C. Spring breaker ta kasance ba za a iya kawo shi ne a lokacin cycle na 17 saboda lubricant da ya zama daidai, amma permanent magnet breaker ta ci gaba da ±2ms action time deviation - ba a zama da kyau a yi amfani da heating blankets don mechanism cabinets.

• Intelligent Control Advantages: Electronic controller na ƙaru ya shiga contact travel curves a baya. Daga lokacin da 0.3mm over-travel deviation ta faru a phase B, system ta bincika muna 24 hours a baya - ba kamar spring mechanisms na daɗi, wanda suke yi amfani da audible cues da kuma kusa fail a lokacin da connecting pin ta fitowa.

• Lifespan and Energy Consumption: Ba ƙarin shekara, disassembled permanent magnet breakers sun neman 0.05mm na contact erosion, amma 0.3mm a cikin unmodified spring breakers. Abin da ya fi shi da ƙarin: holding current na 50µA (1/1000th na traditional mechanisms) ta fi shi da failures na coil overheating.

III. Two Years of Operational Data

Ba ƙarin shekarar 2012, 16 permanent magnet breakers suka yi aiki 730 days, wanda suka bayar statistici:

• Annual operation failures ta rage daga 27 zuwa 0

• Maintenance man-hours per unit ta rage daga 8 zuwa 1.5

• Overall equipment failure rate ta rage daga 92%

A lokacin yakin ƙarin harmattan na shekarar, idan na bincika cewa 'yan ƙungiyar suke yi test breakers da kusa, na neman ranar da na yi a lokacin da na yi amfani da spring mechanisms a lokacin tsari. "Maintenance-free" nature na tekunologin permanent magnet ta fi muni da kyau don a yi smart grid upgrades - wannan ita ce shahara cewa innovation na tekunoloji ta shafi abubuwan da suka faru a lokacin da ya kai, kuma ta ba da jin da suke faru a lokacin da ba.