Yadda Ake Magance Gazawar DCS a Masana'antar Wutar Lantarki? Jagorar Fasaha ga Injiniyoyi
Sabbin hanyoyin samar da wutar lantarki suna dogaro ƙwarai da ingantaccen aikin na’urorin sarrafa masana’antu. Idan Distributed Control System (DCS) ko Programmable Logic Controller (PLC) ya samu matsala, sakamakon na iya zama mai tsanani—daga tsayawar aiki mai tsada zuwa haɗarin tsaro. Wannan labarin yana ba da shawarwari masu amfani, matakan fasaha, da bayanan ainihi don taimaka wa ma’aikatan shuka da injiniyoyi su magance gazawar tsarin sarrafawa yadda ya kamata tare da bin ka’idojin zamani na E-E-A-T.
Fahimtar Dalilin da Yasa Tsarin Sarrafawa Ke Gazawa a Masana’antar Wutar Lantarki
Gazawar tsarin sarrafawa ba kasafai suke da dalili guda ɗaya ba. Yawanci suna fitowa ne daga haɗuwar matsin muhalli da tsufewar sassa. Misali, zafin jiki mai tsanani a cikin kwandon na’urorin sarrafawa na iya rage aikin mai sarrafa bayanai (processor). Haka kuma, hayaniyar lantarki (electromagnetic interference) daga kayan wutar lantarki masu babban ƙarfin wuta na iya lalata watsawar bayanai. Saboda haka, injiniyoyi dole su duba fiye da alamu na farko don gano ainihin tushen matsalar. Cikakken bincike sau da yawa yana nuna cewa kusan kashi 40% na gazawa na da nasaba da matsalar wutar lantarki, yayin da kusan kashi 30% kuma ke fitowa daga matsalar wayoyi a filin aiki.
Abubuwan Gaggawa da Za a Yi Idan DCS Alarm Ta Yi Karo
Sauri da daidaito suna da muhimmanci lokacin da tsarin ya rikice. Da fari, ya kamata masu aiki su shiga cikin event logger domin ɗaukar takamammen lokaci da irin kuskuren da ya faru. Maimakon share alarm ba tare da bincike ba, dole ne su kwatanta alarm ɗin da ƙimar sigogi (process values) da ke kusa. Misali, idan na’urar auna zafin jiki ta gaza, duba matsin iska (pressure) da ya dace da ita na iya tabbatar da ko matsalar tana kan na’urar auna ce ko kuwa ainihin tsarin ne ya karkata. Wannan hanya na hana tsaida shuka ba tare da buƙata ba, sannan tana hanzarta gano matsala.
Jagorar Binciken Matsalar Hardware Mataki-zuwa-Mataki
Idan ana zargin hardware, a fara da duban power modules. Auna ƙarfin wutar lantarki mai fita a kan terminals don tabbatar da cewa tana cikin ka’ida—yawanci 24V DC ±10%. Bayan haka, a duba katunan shigarwa/fita (input/output cards) don ko akwai ƙamshin ƙonewa ko lalacewa a fili. Idan katin ya lalace, a maye gurbinsa tare da tabbatar da cewa sabon katin yana da irin wannan sigar firmware ɗin. Bayan sauyawa, a yi gwajin loop ta hanyar kwaikwayon siginar 4-20 mA sannan a tabbatar da karatun a dakin sarrafawa. Wannan matakin tabbatarwa yana da matuƙar muhimmanci wajen kiyaye sahihancin bayanai.
Dabarun Farfaɗo da Software da Configuration
Matsalar software sau da yawa tana bayyana ne a matsayin allon kwamfuta da ke aiki ba daidai ba ko umarni da ba sa amsawa. A irin wannan yanayi, mataki na farko shi ne duba nauyin CPU da amfani da ƙwaƙwalwa (memory). Idan an cika mai sarrafa bayanai da nauyi, a yi la’akari da sauke aikin adana tarihin bayanai zuwa wani uwar garke dabam. Idan database ta lalace, mayar da madadin bayanan da aka fi amincewa da su (last known good backup) ita ce hanya mafi sauri. Koyaushe a ajiye akalla tsararraki uku na backups a kan ingantaccen na’urar ajiya a kan hanyar sadarwa mai tsaro. Bugu da ƙari, a rubuta kowane canjin software a cikin littafin log don sauƙaƙe binciken matsala a gaba.
Aiwatar da Shi a Aiki: Kare Tsayawar Aiki ta Hanyar Redundancy
Wani shukar combined-cycle a Spain ta aiwatar da cikakken redundancy a kan hanyar sadarwar DCS ɗinsu. Sun girka dual power supplies da hanyoyin sadarwa masu maimaituwa (redundant communication paths). Lokacin da aka yi guguwa kwanan nan, wani network switch ya lalace sakamakon tashin wuta. Amma hanyar madadin ta biyu ta ci gaba da aikin sadarwa ba tare da katsewa ba. Shukar ta guje wa tsaida aiki, inda ta adana kimanin €200,000 na asarar kudin samar da wutar lantarki. Wannan misalin ya nuna cewa saka jari tun farko a redundancy yana rama kansa lokacin babban lamari na farko.
Binciken Lamari: Amfani da Predictive Analytics ya Rage Tsayawar Aiki Maras Tsari da 30%
Babbar masana’antar wutar lantarki da ke amfani da kwal a yankin Midwest na Amurka ta fuskanci matsaloli masu maimaituwa da tsarin sarrafa murhun tururuwarta (boiler control system). Suka haɗa kai da wani kamfanin automation don girka dandalin predictive analytics. Tsarin yana sa ido kan valve positioners da lokacin amsawar actuators a kai a kai. Lokacin da ya gano kusan kashi 5% na karkacewa a lokacin amsawa, sai ya sanar da ƙungiyar kula da gyara. Sakamakon haka, suna gyara actuators ne a lokacin tsayawar aiki da aka tsara, ba a lokacin gaggawa ba. A cikin shekaru biyu, tsayawar aiki maras tsari ya ragu da kusan 30%, kuma kuɗin kula da kayan aiki ya ragu da 22%.
Ra’ayin Marubuci: Sauyawa Zuwa Tsarin da Ke Ƙara Kansu da Kansu (Self-Optimizing Systems)
A cikin ƙwarewata a kan ayyukan commissioning na shuke-shuke daban-daban, ina ganin wani salo mai bayyana: tsarin sarrafawa suna zama kamar suna da sani kansu. Sabbin dandamalin DCS yanzu suna zuwa da na’urorin bincike na ciki (embedded diagnostics) waɗanda ba wai kawai gano gazawa suke ba, har ma suna ba da shawarwarin gyara. Misali, idan control valve ta makale, tsarin na iya canjawa ta atomatik zuwa wata hanya ta madadin sannan ya sanar da mai aiki. Wannan sauyi yana rage nauyin tunani a kan ma’aikatan dakin sarrafawa, yana barinsu su mai da hankali kan yanke shawarar dabaru. Ina ba da shawara ga manajojin shuke-shuke su fifita horas da ƙungiyoyinsu kan waɗannan sabbin fasalolin diagnostics domin su amfana da su ƙwarai.
Kyawawan Hanyoyin Girka Sabbin Ayyukan DCS
Girka na’urori yadda ya kamata yana hana yawancin gazawa da ake yawan gani. Lokacin da ake ɗaura kwandon na’urorin sarrafawa, a bar akalla 150 mm a buɗe a kowane gefe don samun iska. A yi amfani da shielded twisted-pair cables don siginar analog domin rage hayaniya (noise). A raba kebul na AC mai babban ƙarfin wuta da kebul na DC mai ƙaramin ƙarfin wuta da akalla 300 mm. Lokacin da ake haɗa wayoyi a terminal, a yi amfani da ƙarfin dunƙulewa (torque) da ya dace—yawanci 0.5 zuwa 0.6 Nm—domin guje wa raunin haɗin waya. A ƙarshe, a yi wa kowane kebul da kowane terminal lakabi a sarari; wannan ƙaramin mataki na iya rage lokacin binciken matsala da 50%.
Yadda Ake Aiwtar da Shirin Predictive Maintenance
A fara da gano muhimman control loops waɗanda kai tsaye ke shafar samarwa. A girka ƙarin na’urorin auna sigina domin sa ido kan lafiyar waɗannan loops, kamar na’urar auna girgiza (vibration sensors) a kan actuators. A yi amfani da uwar garke ta musamman don tattarawa da nazarin waɗannan bayanai. A sa matakan ƙofa (thresholds) bisa tarihin aikin kayan—a misali, idan bawul (valve) ta ɗauki kashi 20% fiye da lokacin da take sabuwa kafin ta amsa, a yi mata alamar a duba ta. A duba bayanan duk mako sannan a tsara gyare-gyare a lokacin tsayawar aiki da aka riga aka tsara. A cikin watanni 12, irin wannan shiri yawanci yana kawo ragin kuɗin kula da kayan aiki na kusan 15–20%.
Tambayoyi da Ake Yawan Yi
Q1: Sau nawa ya kamata mu sabunta DCS firmware?
A: A sabunta firmware ne kawai idan sabon sigar ta magance wani takamaiman matsala da ke shafar shukar ku. A guji sabuntawa ba tare da buƙata ba, domin suna iya kawo sabbin kurakurai. Koyaushe a yi gwaji a kan tsarin da ba mai matuƙar muhimmanci ba kafin a yi amfani da shi a tsarin babban aiki.
Q2: Wace hanya ce mafi kyau don horas da masu aiki kan sabbin fasalolin DCS?
A: A yi amfani da haɗin gwiwar horon ajin karatu (classroom training) da zaman horo na hannu (hands-on) tare da simulator. Simulator yana ba da damar masu aiki su yi atisayen magance gazawa ba tare da sanya ainihin shuka cikin haɗari ba.
Q3: Za mu iya haɗa tsofaffin PLCs da sabon DCS na zamani?
A: Eh, ta amfani da protocol converters ko OPC servers. Sai dai a tabbatar an tsare hanyar haɗin da kyau kuma ba ta zama wuri guda na gazawa (single point of failure) ba. Shuke-shuke da dama suna amfani da gateway devices cikin nasara don haɗa tsofaffi da sabbin tsare-tsare.
