Created "Three Lines of Defense" for Submarine Cable Protection

Lonely between Hainan Island and the prosperous Guangdong Zhanjiang, it is China's third largest Straits Qiongzhou Strait. At the sea bottom nearly one hundred meters deep in the Qiongzhou Strait, a submarine cable known as the “deep lifeline” crosses the strait.

It ended the history of Hainan's "electricity isolated island" for almost a hundred years since 1914. The daunting task of guarding this lifeline falls on the shoulders of a group of young people under the age of 27, who are Southern Net’s “Navy” for the ultra-high voltage transmission company of China Southern Power Grid.

Enhance regional energy cooperation

The core equipment of Hainan's networked project is a 31-kilometer-long submarine cable, and anchoring is the greatest security risk threatening this lifeline. Once the cable is damaged by the ship's anchorage, it may result in up to 200 million yuan in repair costs. The repair period is up to 3 months. In the Qiongzhou Straits, there are 110,000 ships and over 2,000 foreign ships in the past. The offshore fishing and aquaculture activities on both sides of the Straits are frequent. Anchoring of ships and fishery activities seriously threaten the safety of submarine cables.

Safe operation can not be separated from Hainan Province and China Southern Power Grid's full cooperation, but also can not be separated from the ability to come, able to fight, the battle of the South Network "Navy." This is the post-80s team of the Haikou Branch of the Haikou Branch of the Guangzhou Bureau of China Southern Power Grid EHV Transmission Co., Ltd., a post-80s team that grew from scratch, from weak to strong, and from the "Army" to the "Navy."

As of December 6, China's first 500-kV ultra-high voltage, long-distance, high-capacity cross-sea networking project has been operating safely for 1,255 consecutive days. For more than three years, this “first in Asia, second in the world”, connected to the “lifeline” of Hainan Power Grid and the main network of China Southern Power Grid, resisted “Vicente”, “Nasa”, and “Nige” 11 Typhoon 8 or above and severe tropical storms provided emergency support to Hainan Power Grid for three times. Cumulative transmission of electricity was 371 million kwh, of which Hainan sent 284 million kwh to Guangdong, and Guangdong sent 88 million kwh to Hainan. Completed the power supply tasks of the 18th, Asian Games, Universiade, Boao Forum and other important activities. Significantly improved the safety and stability of Hainan power grid operation, effectively solved the prominent contradiction of Hainan power grid small network, promoted the complementary between Hainan power grid and the mainland power grid, and effectively promoted energy conservation and emission reduction, and the unit utilization hours increased by 9 %, unit coal consumption decreased by 3.5%, standby fuel unit fuel consumption decreased by 62%.

Polishing sea combat hard skills

Crossing the strait and riding the wind and waves are commonplace in South China Sea's "Navy." Every week, three and five are required to conduct regular inspections of the submarine cable route. During the important tasks of guaranteeing power supply, special patrols shall be added and special cable protection activities shall be carried out.

"It was full of vomiting, and it was even more unpleasant to eat without it; when the boat started to vomit, it was more uncomfortable to stop. The kind of diesel smell got into the nose like a catalyst, and people's digestive system felt something could not stay." The operation and monitoring of the grid cable operation and maintenance department Gao Dongming said. Lin Bo, deputy secretary of the Party Committee of the Haikou Branch of the EHV Power Transmission Company, said with emotion: “The conditions are much better now. Everyone has just started working on the sea. The first lesson is vomiting. It is really not easy for these boys to get down.”

The South China Sea “Navy” has a record of sea life: it floats on the sea for more than 100 days, and it only lands two or three times a month on average. In August last year, South Network Ultra High Voltage hired a Swedish company to protect the submarine cables from ripraps. In order to ensure the progress of the project and construction quality, the "Navy" fighters conduct process supervision on board the ship for 24 hours. The more than 100-day duration is a great challenge to everyone's physical and psychological pressure. When the ships were routinely replenished from Hong Kong, they stood on the shore and felt emotions: “How can you feel like you're shaking on this land? However, it's a down-to-earth feel!” Behind this, the young “navy” spends 20 Heaven's effort to overcome seasickness and vomiting was the loneliness of the Spring Festival alone to stay in the duty room. It was a trip to the sea and land three times a day... He Caihao, the leader of the emergency cable submarine team, said: “In every encounter, we ask ourselves, Only wins, no defeat!"

Created "Three Lines of Defense" for Submarine Cable Protection

In the long-term operation practice, China Southern Power Grid EHV Transmission Co., Ltd. is committed to strengthening the comprehensive security system from the aspects of mechanism construction, organizational security, protection zone monitoring, and emergency management, and forms the “three lines of defense” for cable protection.

The government and the enterprises joined forces to implement legislation and system construction, and coordinated and coordinated the forces of all parties. Hainan's network operation and maintenance departments built a "first line of defense." On August 1, 2011, the “Regulations on the Construction and Protection of Electric Power in Hainan Province” was implemented. This is the first of its kind in China and provides a reliable legal basis for the protection of submarine cables. In addition, the submarine cable protection involves many departments and coordination is difficult, and repeatedly hit the wall so that they practice a "cheeky." Hard work pays off, and has finally contributed to the Hainan Provincial Government's convening of a milestone submarine cable protection joint conference. Hainan Province Marine Fisheries Department, the Provincial Department of Industry and Information Technology, the Provincial Department of Transportation, the Provincial Public Security Frontier Defense Corps, the Hainan Maritime Affairs Bureau, the South China Sea Rescue Bureau and other 11 units have joined forces to ensure reliable external protection of submarine cable protection.

Internal repairs and refinements, strengthening civil defense is the "second line of defense." Cross-sea interconnection is a comprehensive innovation in the history of power grid engineering. There is no mature technical experience and normative standards to learn from. The complex conditions in Shanghai and the lack of offshore work experience in the team are the main reasons for the maintenance of submarine cables for the young South Sea “Navy”. A huge challenge. In order to adapt to the work requirements, young men are squeezing their time out to study every day, and have thoroughly enjoyed many professional contents such as patrol surveillance, protection and publicity, construction inspection, and repair and troubleshooting.

After more than three years of exploration and research on the operation and maintenance of submarine cables, they organized and organized the first “Standard for the Operation and Maintenance of Submarine Cables for the 500 kV Fugang Line” in China, and compiled the “Operational Regulations for the 500 kV Fuhai Line Submarine Cables”. The 41 types of submarine cable operation and maintenance work forms have been further standardized, which has further regulated the operation and maintenance of submarine cables and cast a "third line of defense." In addition, in accordance with the development plan for the energy sector issued by the National Energy Administration, the South China Sea “Navy” took part in the drafting of three power industry standards such as “Operational Regulations for Submarine Power Cables”. Indonesia National Electric Power Corporation, British Columbia British Columbia Electric Power Company and Zhejiang Zhoushan Electric Power Bureau visited and studied. Since 2012, a total of more than 160 unusual accidents such as the anchoring of ships that could cause major damage to the submarine cable have been avoided, and nearly 50 times of anchoring operations have been discontinued.

It is with the courage to dare to win the conviction, South Network "navy" in the past more than 1,000 days and nights to overcome the storm, suffered endurance and hardships, and write a power grid engineering in the history of one after another innovative chapter. In his ordinary and important positions, he used loyalty and responsibility to create a “submarine Great Wall” and cast a historical monument linking the people’s livelihood on both sides of the strait and lighting up thousands of lights.