The 220kV Jialong 43T1 and Luolong 43R6 lines are important power lines for transporting energy to the Yushan Island Green Petrochemical Base in Zhoushan. The Zhoushan Yushan Green Petrochemical Base is the world's largest single industry investment project and also a national key strategic project. State Grid Zhoushan Power Supply Company has always been committed to strengthening the construction and intelligent operation and maintenance of island power grid lines, making every effort to ensure the power supply of Yushan Petrochemical, and creating an island demonstration of oil and gas full industry chain services. Ensuring safe and reliable power supply for the Yushan Green Petrochemical Base will better serve the development of China's petrochemical industry and marine economy.

In July 2018, our company's distributed fault diagnosis system for transmission lines was applied to the 220kV Jialong 43T1 and Luolong 43R6 double circuit lines. The system can quickly determine the fault interval, clarify operation and maintenance responsibilities, accurately locate the fault point, assist in guiding rapid emergency repairs, effectively shorten the power outage time due to line faults, reduce the loss of transmission capacity caused by power outages, and provide reliable guarantees for the rapid recovery of power supply after line faults.

The Qingmin Line, Fufeng Line, and Huaibei Line are all under the jurisdiction of Fuzhou Power Supply Company, and are typical AC 220kV cross regional transmission lines, which are important components of the Fuzhou power grid. Due to the zoning management of urban power lines and the increasing complexity of power lines, the fault tripping rate has also correspondingly increased. In order to achieve rapid diagnosis of line faults, our company's distributed fault diagnosis device has been installed and applied on transmission lines such as the Qingmin Line, Fufeng Line, and Huaibei Line. Since its application, this system has made important contributions to the stable operation and fault handling of transmission lines, especially in providing important reference basis for zoning responsibility management of transmission lines, precise positioning of faults, identification of fault causes, and line renovation.

Partial application lines:

Ø 500kV Dongsan I, II, III lines

Ø 500kV Sutian 5252 line

Ø 500kV Yaowu Line

Ø 330kV Taole Line

Ø 220kV Jialong 43T1 and Luolong 43R6 double circuit lines

Ø 220kV Qingmin Line

Ø 220kV Fufeng Line

Ø 220kV Huaibei Line

Ø  220kV Bo traction I and II lines

Ø 220kV Nuclear Power Generation I and II Lines

Ø  220kV Shayang I and II lines

Ø 220kV Jinghe Line

Ø  110kV Pufeng Line

Ø  110kV Zecao Line

Ø 110kV Zihu Line

Ø  110kV Shengli Line

Ø 110kV Wangjun I and II lines

Ø  110kV Sunhai Line

Ø 110kV Baizhong Line

Ø  110kV Ula Line

Ø 66kV Lin Ma Yi Line

Ø  66kV Guanggong A and B lines

Ø 66kV Beiyuan Line

Ø 66kV Ma Hei Line