Zhoushan, Zhejiang: Submarine cable put on a "perspective mirror"

Penetrate dark nights or thick clouds to detect targets, accurately locate high-speed moving objects, and detect distances up to 5 kilometers. This is a high-definition fog monitoring technology that was used in the military field. Today, the Zhoushan Power Bureau applies this technology to submarine cable monitoring and puts on a “spectrum mirror” for the safe operation of the submarine cable.

On March 6th, the Bureau organized a special meeting to summarize the actual application effects of the “High-definition, fog-permeable day and night submarine cable video monitoring equipment”. The technicians stated that the monitoring range was 3 to 4 times the previous one and 4 km in the dark. Not only can the ship be clearly discovered, even the details of the crew using a lighter to light cigarettes are crystal clear.

Due to the special geographical environment of the archipelago, Zhoushan and the mainland and the inter-island power supply mostly use submarine cables. Up till now, there are a total of 38 submarine cables within the city, with a total length of 248 kilometers. In recent years, with the increase in the number of ships sailing, repairing, berthing, and construction in the Zhoushan sea area, the risk of damage to the cable has continued to increase. In order to ensure the safety of the “lifeline” at Zhoushan Power Grid, the Bureau began to supervise some of the submarine cables through remote video surveillance technology in 2007. "At present, AIS ship monitoring, video surveillance and other technologies are in the province's advanced level in the field of transmission line security monitoring, but there are still problems such as 'not covering a wide area and many blind spots', 'do not have night vision and fog vision function' and so on." Technical staff said. Information Sources:

To this end, the Bureau has introduced and piloted high-definition, fog-permeable day and night submarine cable video surveillance equipment. “This equipment was applied to the 110 kV submarine cable from Ningbo Guoju to Zhoushan Liuheng. Using night laser light integration technology, it effectively overcomes the blind zone of night vision for submarine cable video surveillance. The fogging performance of the video is obvious. The monitoring and extension of the focal length will be doubled and extended, which will play an exemplary role in the intelligent monitoring of Zhoushan transmission and distribution submarine cable.” The technicians stated that this equipment will be installed and used in eight 110 kV submarine cables this year. Promote the application throughout the city.

On this basis, the Bureau set out to develop the "integration of submarine cable operation and monitoring" system. This system is to further deepen the original submarine cable monitoring and alarm system, and fully utilizes the most advanced electronic nautical charts, AIS information, photoelectric sensors, thermal imaging and video monitoring, radar monitoring, warning sign telemetry, and image intelligence analysis in the field of domestic surveillance alarms. The functions and technologies of devices or systems such as smart voice, etc., to realize mutual complementarity of their respective functions and system linkages, increase the recognition rate of ships in the surveillance area, and remind the vessel that no anchoring is allowed in the prohibited anchorage zone.

After successful research and development, this project will become the industry’s only, leading, all-season, integrated monitoring and application platform for submarine cables, and will create a high-end monitoring equipment for the first time in the power industry. By then, the system can effectively block false alarms caused by various factors, greatly increase the true rate of alarms, and use comprehensive monitoring and alarming techniques to prevent accidents such as anchorage loss of submarine cables. It also enables unattended creation of submarine cable observation platforms. Conditions.