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How can offshore wind power operation and maintenance "enter the sea"

Author: Yonghao Electric Wire   Release time:2018-02-14 20:41:00   Visits:0
With the growth of China's wind power stock market, onshore wind power operation and maintenance has become an important post-market for the wind power industry.  At present, offshore wind power is gradually entering a new stage of large-scale development. What challenges are offshore wind power operations facing?  How to grasp the opportunities brought by offshore wind power operation and maintenance?  As a leading province in offshore wind power development, Jiangsu first faces these problems.

Pioneers Face New Issues

According to the wind power planning target of Jiangsu province, during the 13th five-year plan period, 3.5 million kilowatts of offshore wind power and 6.5 million kilowatts of onshore wind power will be installed.
At the 10th China (Jiangsu) International Wind Power Industry Development Summit Forum held a few days ago, Tang Xuewen, director of the New and Renewable Energy Division of Jiangsu Energy Bureau, disclosed that as of last month, Jiangsu's offshore wind power installation had reached 1.44 million kilowatts, accounting for about 70% of the country's total offshore wind power development and expected to reach 2 million kilowatts by the end of this year.
Tang Xuewen said that at present, Jiangsu's wind power industry chain has achieved full coverage. By the end of 2016, the top 5 wind power complete machine manufacturers in the country have all set up their businesses in Jiangsu, with about 200 backbone enterprises in Jiangsu's wind power equipment.  Through independent research and development, technology introduction and foreign joint design, these enterprises and scientific research units have mastered the key technologies of wind power manufacturing in a relatively short period of time, which has greatly promoted the development of wind energy resources in Jiangsu.
According to reports, as one of the main battlefields for offshore wind power development in China, Jiangsu has always adhered to five priorities in promoting offshore wind power development: focusing on planning guidance, policy innovation, demonstration innovation, standards and norms, and industrial support.
For Jiangsu, the forerunner of offshore wind power development, the operation of large-scale offshore wind power projects will also open up the offshore wind power operation and maintenance market.  Jiangsu offshore wind power operation and maintenance experience will also become an important reference for China's offshore wind power operation and maintenance in the future.
The participants believed that although the pace of the early development and construction of Jiangsu offshore wind power has not slowed down, "how to safely operate these existing stock markets and how to operate them more efficiently are really in front of us."


Offshore operations are quite different from onshore operations.


China Electric Power Construction East China Institute is the main survey unit for wind power development in Jiangsu.  Zhao Shengjiao, deputy chief engineer of China Electric Power Construction East China Institute, said at the forum that offshore wind power has entered an era of large-scale development.  With offshore projects getting farther and farther offshore, offshore booster stations are generally set up, and offshore wind power technology has become more and more mature.
According to reports, Jiangsu Dafeng coastal shallow sea radiation sand state, with solid sand, known as "iron sand", is the world's only two silt-long radiation sand states with stable wind speed and favorable conditions for the construction of wind farms.  It is based on the advantageous conditions here that the Three Gorges Group, Huaneng Group and other enterprises have all laid out large offshore wind farms here.

Zhao Shengjiao said, judging from these implemented projects, wind turbines are developing towards large scale.  In terms of construction technology, offshore construction technologies such as large-diameter single pile have entered the stage of large-scale application.  Technological exploration such as large unit manufacturing and large diameter single pile construction will play a significant role in promoting the offshore wind power development in China, the localization of key technologies and the systematization of construction operations.

Up to now, Shanghai Electric has taken up about 61% of the domestic offshore wind power market and has accumulated the most abundant experience in offshore wind power operation and maintenance.
Zhou Weixing, Deputy Minister of Offshore Operation and Maintenance of Shanghai Electric Wind Power Group Co., Ltd. Engineering Services Branch, believes that offshore wind power operation and maintenance is very important in two aspects: standardization and wisdom.
According to Zhou Weixing, Shanghai Electric Wind Power Group has set up 9 dimensions and refined 44 indicators. EHS management personnel conduct inspections irregularly to ensure standardization of on-site management level.  "To realize intelligent operation and maintenance, the first is to realize remote monitoring and the second is to realize big data fault diagnosis.  For this reason, Shanghai Electric has established a offshore wind power data center in Shanghai. "
It is understood that offshore wind power construction and operation and maintenance platforms play a significant role in terms of offshore wind power operation and maintenance costs.  Statistics show that about 30 offshore wind power platforms and ship types are currently being operated, built and will be designed and put into operation in China.
Tang Guangyin, head of offshore wind power at China Classification Society's Offshore Engineering Technology Center, believes that the trend of offshore wind power installation platforms in the future is to adapt to the deeper and deeper water depth in the future, to increase the main hoisting capacity, and to increase the deck area and carrying capacity.  The above trend, on the one hand, is to adapt to the installation needs of more and more offshore wind turbines, on the other hand, is to adapt to the installation of more and more deepwater support structures.
"Wind power installation ships have started to move from simply installing a certain component to being able to self-navigate and self-transport and to be fully functional.  In the future, it is likely that one ship can complete the development and construction of the entire wind farm with extremely high efficiency. "  Tang Guangyin said.
Zhao Shengxiao warned that offshore wind power is a high risk and every link in the development process needs to be carefully designed. Details such as steel price increases may affect the final investment income of the project.

Offshore Wind Power Needs Insurance Support

With the opening of China's offshore wind power market, the involvement of insurance becomes more and more urgent for offshore wind power, which is a high-risk field.
Su Yang, head and director of Weilai Insurance Brokerage Co., Ltd. in Jiangsu, Zhejiang and Anhui provinces in China, said that Europe's offshore wind power investment mode is different from China's. Most of it relies on banks and financial systems for project financing, while in China, it mainly obtains bank financing through the guarantee of large state-owned enterprises and private enterprises themselves.  Therefore, finance has provided great support for the development of offshore wind power in Europe, and at the same time it has also taken great risks.  As the amount of investment in the project is increasing, financial institutions are demanding more and more insurance.  "
Although China's insurance intervention in the wind power industry can be traced back to the 1980s, it was limited in the wind power market before 2005 because the domestic wind power industry had not yet formed a large scale. The insurance industry did not distinguish this business from other insurance businesses and followed the conventional insurance model.  After 2005, the wind power insurance market has really developed.  However, over the past ten years, the wind power insurance market has also focused on onshore wind power projects.
Su Yang said that in the future, with the intervention of diversified capital, the wind power industry will rely more on the financing capability of the project itself and communicate with the financial market.  "At this time, the financial market will have higher and higher requirements for project risk management and higher and higher requirements for certification.

"Some domestic offshore wind power projects still follow the insurance schemes for onshore projects. These insurance schemes are not suitable for the characteristics of offshore wind power.  Apart from replacing parts, offshore wind power will also incur a large number of other costs, including maritime costs.  Judging from the project situation in Jiangsu region, if offshore wind power does not consider these costs, once problems arise, there will be great disputes between the owner and the insurance company. "  Su Yang said.  (Wen Yi Zhang Zirui)