Il-prima bussola DC flessibbli ta' 800 kV sviluppata localment f’Ċina t-tiegħet issa l-ewwel.

Il-11 ta' Ġunju, fil-Konvertitur Liuzhou tal-Proġett Multi-Terminal DC Flessibbli UHV tal-Ġilbrin Wudongde għal Guangdong u Guangxi (miktub b'siġla "Proġett Kun-Liu-Long DC"), il-bushing DC flessibbli ±800 kV indipendentement sviluppata mill-Manifatturier tal-Bushing tal-Paret DC Flessibbli tal-Ċina rinxitiet b'suċċess u qed topera stabbilment. Il-lanċament ta' dan il-proġett rċievi attenzjoni sostanzjali minn media mainstream magħżula.

Il-funzionament suċċess tas-silġ bushing DC flessibbli ±800 kV tindika li l-Ċina saret tiftaħ it-teknoloġija estera fl-ambjt tal-bushing DC flessibbli UHV u imballat il-vuċċjar lokali tal-bushing tal-paret DC flessibbli ±800 kV. Dan l-aħħar success huwa parte minn serje ta' successes preċedenti tal-Manifatturier tal-Bushing tal-Paret DC Flessibbli tal-Ċina: fl-2012, sviluppà bushing konvertitur ±125 kV u ±800 kV, bushing paret ±50 kV u ±600 kV, u bushing impregnati bil-paper olio-SF6 ta' 550 kV u 1100 kV; fl-2018, sviluppà l-ewwel bushing impregnat tal-paper ±1100 kV għall-konvertitur fl-Ċina; fl-2019, kreeja l-ewwel bushing kompost tal-gass SF6 tal-paret DC flessibbli ±1100 kV tal-epoksi-core fid-dinja; u fl-2020, sviluppà indipendentiment l-ewwel bushing impregnat tal-paper ±800 kV għall-valvola u bushing impregnat tal-paper ±800 kV għall-paret.

Dan l-aħħar miftaħ jindika l-lokalizzazzjoni totali tal-portfolju prodotti tal-bushing AC/DC UHV tal-Ċina mill-Manifatturier tal-Bushing tal-Paret DC Flessibbli tal-Ċina. Huwa huwa signifikant profondament għal soluzzjoni tal-bottaljieri tal-teknoloġija kruċiali ("chokepoint" issues), rafforzament tal-katena industrija tal-trasferiment tal-enerġija u trasformazzjoni tal-Ċina, spjegatura tal-upgrades industriji u teknoloġiji domestiki, u accelerazzjoni tal-lokalizzazzjoni tal-komponenti kruċiali għal sistemi tal-enerġija UHV.

Ħarsa lil Missjun Central SOE u Ssir R-responsabilità tal-Lokalizzazzjoni

Għal tmiem mhux qis, il-bushing DC UHV limitaw l-lokalizzazzjoni tal-proġetti UHV tal-Ċina u restringjaw il-moviment rapid tal-industrija tal-enerġija nazzjonali. Bħala lider fit-sektor manifattura tal-equipament tal-enerġija, il-Manifatturier tal-Bushing tal-Paret DC Flessibbli tal-Ċina se betta mmexxi lill-avviż tal-mgħodda tal-equipament UHV tal-Ċina. Fl-ambjt tal-bushing DC UHV, l-impresa saret ddedikata għal avviż tal-bushing DC epoksi-core SF6 kompost ±1100 kV għal proġett Changji–Guquan fl-2018 - prodott li installat perfettament tal-ewwel darba u passa suċċessfil test ta' energizazzjoni ta' pole ta' fuq, u operat affidabilment fuq il-grid għal kbir ta' sena.

Fl-2019, l-ewwel bushing impregnat tal-paper ±1100 kV għall-valvola tal-konvertitur fl-Ċina passa l-test kollu tal-ewwel darba, kun l-prestazzjoni teknika totali tirriċi l-standards internazzjonali ta' fuq, jistabili l-fundament għal lokalizzazzjoni massiva tal-bushing DC. Fl-Novembru 2020, l-impresa sviluppà indipendentiment l-ewwel bushing impregnat tal-paper ±800 kV għall-valvola u l-ewwel bushing impregnat tal-paper ±800 kV għall-paret, li implementati fil-proġett tal-trasferiment DC UHV Qinghai–Henan ±800 kV, forniti serje tal-massa tal-bushing li operati b'suċċess sa hawn. Il-10 ta' Ġunju 2021, l-ewwel bushing DC flessibbli ±800 kV fl-Ċina rinxiet u inizjat operazzjoni fil-Konvertitur Liuzhou ±800 kV.

Il-Manifatturier tal-Bushing tal-Paret DC Flessibbli tal-Ċina kontinwa ssir esemplari fl-ambjt UHV, produċi un success wara l-ieħor. Wara din il-gluri jinsab ir-responsabilità u l-impegno ta' central state-owned enterprise (SOE) biex ibni l-equipament nazzjonali importanti, kif ukoll l-missjun u l-belief fort ta' dipendenti tagħha biex jiżgħdu lill-orijini u jassegwu l-iċħfet tal-perfezzjoni.

Superar i-"Chokepoint" Challenges u Raggiungere il Salto Tecnologico

Il-Proġett Kun-Liu-Long DC huwa l-ewwel proġett dimostrativ multi-terminal DC UHV tal-Ċina u l-ewwel proġett DC flessibbli UHV fid-dinja. Jipporta rekordi mondiali għal livell tal-voltaggi l-ebbu, kapacità tal-trasferiment l-akbar, u distanza tal-trasferiment l-inferiori fl-ambjt tal-proġetti DC flessibbli, rappresentandu l-punt tal-diffikultà teknika u komplessità ingegneristica fil-setturu tal-trasferiment u trasformazzjoni tal-enerġija oggidì. Il-bushing DC flessibbli ±800 kV sviluppata mill-Manifatturier tal-Bushing tal-Paret DC Flessibbli tal-Ċina għal dan il-proġett huwa sofistitat, teknikament ammexxiant, u realizzata b'temp stretti.

Il-bushing DC flessibbli tal-paret servu bħala l-passaggio uniku bejn il-valvola u l-yard DC fil-konvertitur UHV. Jporta voltaggi super-alti u correnti super-alti, assolvendo funzioni kritici tal-conduttanza tal-corrente, isolament, u support mekaniku - essenzjalment agixxu bħala l-"gorġ" tas-sistema tal-trasferiment DC u l-unika kanal għal corrente DC biex jintuża u jismugħa l-valvola. Senza dan il-passaggio, l-enerġija esterna ma tista' tmur, u l-enerġija interna ma tista' tkun trasferita, rendendu l-konvertitur inoperabile.

Ikkuntant, teknoloġiji kruċiali tal-equipament bushing saru monopolizzati għal tmiem mhux qis minn qabel daqs ta' manifatturieri esterni. L-Ċina dependet fortekki minn importazzjonijiet, bl-assenza tal-potenza tal-prezz, u facendu fronti għal kosijiet ta' manutenzjoni ekstremament alta. Biss permezz ta' innovazzjoni persistenti u raggiungendu l-autonomija teknologika, l-Ċina tista' ivetta l-limiti imposti minn oħrajn. Doppo anni ta' R&D u test, il-Manifatturier tal-Bushing tal-Paret DC Flessibbli tal-Ċina realizza produzzjoni domestika tal-bushing, risolva l-"chokepoint" problema ft-teknoloġija tal-trasferiment DC domestika, spezza monopolju estern, u transforma l-Ċina mid-"follower" għal-"leader" fit-talbiet kruċiali tal-equipament DC.

Biex isseħħ l-iverzjoni opportuna tal-proġett, il-Manifatturier tal-Bushing tal-Paret DC Flessibbli tal-Ċina stabilì l-Gruppo di Guida per il Grande Progetto Bushing DC Flessibbli ±800 kV u l-Gruppo di Miglioramento Lean, concentrandu fis-inspezzjonijiet speciali u sforzi di rettifica lean fit-temi kif l-kontroll del processo u l-miglioramento della qualità, e formulando con cura piani di implementazione e misure di garanzia.

Guided by a strong sense of political responsibility and historical mission, the company reinforced accountability, implemented rigorous process controls, and overcame multiple core technological challenges—including core casting and curing control and highly reliable current-carrying sealing structures—to ensure smooth progress of the R&D mission. To develop the optimal design for the ±80 V flexible DC wall bushing, the group integrated internal and external resources, coordinated cross-functional elements, and organized more than ten design and manufacturing seminars with numerous research institutes and industry experts. These efforts enabled thorough understanding of operational issues and merits of foreign counterparts, ensuring optimized design of insulation, current-carrying capacity, and mechanical performance from the outset.

Upholding the Craftsmanship Spirit to Build National Heavy Equipment

China Flexible DC Wall Bushing Manufacturer has always placed great emphasis on supplier quality management. It conducted extended audits of raw materials from suppliers to ensure compliance with national standards and technical specifications, guaranteeing that component quality meets required technical criteria. Technical briefings were provided to prevent substandard materials from entering the production process and compromising DC product quality.

During manufacturing and testing, the company further refined its existing DC bushing manufacturing system by incorporating expert recommendations. It added or improved four specialized process documents—including assembly work instructions for DC wall bushings—and four specialized quality control documents, such as the ±800 kV Wall Bushing Quality Control Measures Table. Prior to each production step for the ±800 kV bushing, specialized training, technical briefings, and assessments were conducted; during production, technical guidance and monitoring were provided; and after each phase, “look-back” reviews were carried out to enable timely summarization and continuous improvement.

Production strictly followed standardized management practices. An hour-by-hour inspection plan was implemented, and pre-production capability assessments were conducted across six dimensions: personnel, equipment, materials, methods, environment, and measurement. Technical staff provided detailed briefings to operators to ensure all preparations met startup requirements. Throughout production, operations strictly adhered to process flows and the “Three Adherences” principle (adherence to drawings, processes, and standards), with meticulous attention to detail, rigorous process control, and a relentless pursuit of perfection to keep every minor quality factor under control.

Hardship Forges Excellence

“As the final checkpoint before product delivery, we must ensure every unit shipped gives customers peace of mind and satisfaction,” said the Deputy Director of the Bushing Production Center and Head of the Test Station. Due to tight delivery schedules, the company’s test team adopted a 24/7 three-shift system to ensure on-time delivery. To minimize test preparation time, a cross-departmental emergency response team was formed. Upon call—whether on weekdays, weekends, midnight, or dawn—team members immediately mobilized to the high-voltage test hall to assist with on-site preparations. The high-voltage test hall was often brightly lit, with voices echoing: “Ready, start!” and “Slow down, hold steady”—as staff prepared for the next day’s tests.

After 14 months of arduous effort, the R&D team overcame numerous key technical hurdles, including structural design of large-scale flexible DC bushings, casting of massive cores, and assembly of oversized cores. The team mastered critical technologies and key processes, successfully developing the world’s highest-voltage ±800 kV flexible DC wall bushing. Compared with existing imported counterparts, this bushing offers 10% higher current-carrying capacity, 9% greater insulation margin, and 50% higher mechanical strength, with key performance indicators surpassing those of imported equipment. The project generated substantial technical and intellectual property outcomes, including 24 core patents. At the national-level product appraisal meeting, industry experts concluded that the main performance indicators of the ±800 kV flexible DC wall bushing reached international leading levels, and the product successfully passed the national technical certification.

Ħaddmija minn sensof t-tnejjel politiku u missjoni storika, il-kumpanija wassla l-ħtija, implementat kontrolli tal-proċess rigorozi, u ħalliet diversi sfidi teknoloġiċi għoxrin ta’ qalb is-silġ u kollaborazzjonijiet fiex fejn inħolqu strutturi sigurat tas-silġ tas-silġ. Biex tgħaddim il-disenj optymali għal id-dħul tas-silġ DC fleksibbli ta' ±80 V, il-grupp integra r-ressorsi interni u esterni, koordinò elementi trans-funzjonali, u organizzà aktar minn 10 konferenzi tal-disenj u manifattura mal-laboratorji ta’ riċerka u esperti tas-silġ. Dawn l-ħtieġejiet ħalli jkollhom fahmu komplet tas-silġ operattivi u l-meriti tal-kollega stranieri, biex jiżgura dissenju optymal tas-silġ, kapacità tas-silġ, u prestazzjoni mekanika mill-bidu.

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