ISSN 1000-1026

CN 32-1180/TP

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System Protection and its Key Technologies of UHV AC and DC Power Grid

State Grid Corporation of China, Beijing 100031, China


During the development transition period of China's ultra-high voltage(UHV)power grid, the characteristics of power grid continue to change significantly. The traditional defense technologies and measures on security and stability are difficult to adapt, thus the security prevention and control system is needed to improve. The necessity and demand of “system protection” to adapt to construct UHV AC/DC power grid is put forward based on the characteristic-changes of power grid. The design of system protection is proposed, including design ideas, overall composition and specific measures. Then the key technologies of system protection are put forward, and the requirement and framework of panoramic state perception, real-time decision-making and coordinated control as well as precision load control technology are focused on. Finally, the implementation scheme of system protection construction for State Grid Corporation of China is briefly illustrated, which provides a solution for the safe and stable operation control of large-scale UHV AC/DC power grid.



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[1]CHEN Guoping, LI Mingjie, XU Tao. System Protection and its Key Technologies of UHV AC and DC Power Grid[J]. Automation of Electric Power Systems,2018,42(22):2-10. DOI:10.7500/AEPS20180502008
  • Received:
  • Revised:
  • Adopted:
  • Online: November 21,2018
  • Published: