A cikin tarihin da ake amfani da shaida, China ta fi shahara wanda ya yi aiki a fagen yawan ƙarfafin karamin tsawon DC na ±408 kV na duniya.

A haka, wanda ya kai mai suna na karamin shiga jirgin nuna ta kasar China ya samun yin aiki a tashin fadada aiki da take yi a kan cikakken ±408 kV DC transfer switch, wanda ya zama da nasara a cikin jihohin rike guje. Wannan ya nuna cewa an samu aiki da nasara a cikin tsarin da ke yi, kuma yana cikin babban nasara a kan amfani da DC transfer switches a kan 400 kV pole line side.

Jinshang–Hubei UHV na'ura yana cikin masu ukuwa a duniya a gaba-gaban ±800 kV ultra-high-voltage (UHV) DC transmission na'ura. Ana amfani da teknologi na multi-terminal cascaded UHV DC da aka samun a China baki daya, kuma ana kiran ilimin da za a yi a kan amfani da 408 kV DC transfer switch. Daga baya na ilimi da kusa da kuma ilimin da za a yi a kan Sichuan-Tibet region, da ma'ana a gaba-gaban dukun da kuma abu da ya faruwa, takammatar da ke yi aikinsu ba su ci abin da suka shafi, suka maye a kan ilimin da za a yi a kan core technology breakthroughs da kuma innovative structural design. 

Idan an yi coupled analysis ga electromagnetic field, flow field, temperature field, da kuma external auxiliary circuits, takammatar da ke yi aikinsu suka samun rapid self-excited oscillation of DC current, wanda ya aikata a yi maximum transfer current of 6,400 amperes. Kuma idan an yi research a kan corona prevention a gaba-gaban dukun, suka yi design a kan complete shielding system for the equipment, wanda ya aikata a yi DC withstand voltage of 975 kV, wanda ya aikata a yi requirements for operation at 4,000-meter altitude.

Wannan abincin ya samun high current-carrying capacity, overload current rating of 8,000 A; strong DC current transfer capability, supporting a DC transfer current of 6,400 A; high insulation withstand strength, satisfying insulation performance requirements at 4,000-meter altitude; and robust seismic resistance, rated at AG5 seismic level. Samun wannan abinci ya fi aiki a cikin gap global a cikin industry na switchgear don 408 kV-class DC transfer switches, kuma ya aikata a yi special requirements of the Jinshang–Hubei ±800 kV UHV DC transmission project for geographically separated cascaded configurations.

 An zama da amfani a kan large-scale, long-distance transmission of renewable energy under the “West-to-East Power Transmission” initiative, kuma yana da kyau a kan regions da suka fi dukun, da kuma abu da ya faruwa, kuma abubuwan da suka rage. Yana da muhimmanci a kan ensuring safe and reliable power supply, accelerating the clean and low-carbon energy transition, supporting the planning and construction of a new-type energy system, and expediting the formation of a new development paradigm.

A shekarun da suka karka, China’s switchgear manufacturer ya zama da aim of building a world-class enterprise-level scientific and technological innovation platform, adhering to an innovation-driven development strategy, firmly grasping the lifeline of key power grid equipment technologies, strengthening its scientific and technological innovation system, promoting high-level self-reliance and self-strengthening in science and technology, and gradually establishing a leading core competitive advantage in the industry.