The first marine independent power system in the north

On the afternoon of November 5, Wu Xuyong, deputy director of the Qingdao Municipal Bureau of Science and Technology, conducted online exchanges with netizens on the theme of “intensifying reform of the science and technology system and implementing innovation-driven development strategy.” The use of green energy in Qingdao has attracted much attention from the people. The reporter learned from offline interviews that Qingdao has built the first independent energy system for ocean energy in the north, and more than 300 households in Zhaitang use genuine green electricity.

It is reported that Qingdao City has successfully implemented the "500-kilowatt demonstration project of marine energy independent power system" in Zhaitang Island. The project will integrate new energy sources such as tidal current energy, solar energy, and wind energy. The tidal current energy device is divided into two types: floating type and subsea fixed type. Recently, a 100-kilowatt submarine fixed tidal current power generation device has been successfully installed, and the solar energy, wind energy, floating current energy and other devices that are in place in the early stage will be put into operation. It indicates that Zhaitang Island has become the first independent island in northern China to use ocean energy for power supply. More than 300 households on the island can use truly green and environmentally friendly electricity.

The high-energy-consuming companies will use solar energy in 2016 to break through the key technology of metallurgical solar-grade polysilicon production. The solar-grade polysilicon produced will significantly reduce the cost of silicon materials; organically combine photovoltaic power generation with modern agriculture and new rural construction. The innovative photovoltaic agricultural technology shed model and solar eco-town model have been developed, and a photovoltaic industry chain has been established that integrates upstream silicon material purification, mid-stream specialty component manufacturing, and downstream photovoltaic power generation systems.

By 2016, the distributed photovoltaic system power station will cover all high-energy-consuming enterprises in Qingdao; 5 modern photovoltaic agricultural production bases will be built in Qingdao, Linyi and Zhaoyuan; and more than 6,000 mu of photovoltaic agricultural science and technology sheds will be built in the province In addition, more than 7,000 people are employed to form a modern agricultural industry in which the four cores of organic tea, edible fungi, seedlings, and vegetables penetrate the country; a solar-powered ecological town that can accommodate 2,000 people is built.

In terms of wind energy utilization, Qingdao City has completed the development of 2.0 MW semi-direct drive wind turbines in 2012 and has achieved multi-variety and serialized products for wind turbines of megawatt or above. In terms of overall machine structure design, drawing lessons from the successful experience of foreign countries and drawing on the advantages of double-fed models and direct drive models, a semi-direct drive variable speed constant frequency wind generator set was developed. The optimized combination of mechanical transmission and generator technology was achieved. . The development of this unit has filled the domestic gap in the field of wind turbine technical equipment.

Secondly, in terms of medium-speed generator design and manufacturing technology, the integration of speed increasers and generators has been achieved, which has improved the reliability and conversion efficiency of the unit. In blade independent pitch control technology, pitch control technology with independent intellectual property rights was developed through wind speed and blade angle and torque control, and foreign fan manufacturers were eliminated from the blade pitch control system of megawatt wind turbine blades. Constraints.

At present, Qingdao Huachuang Wind Energy and other companies are promoting the integration of 7MW offshore wind turbine electrical control system technology research, and strive to reduce the wind turbine component, facilitate wind turbine maintenance and upgrading, so that China's wind turbine out of the foreign electronic control system and variable current The dependence of device technology has promoted the rapid development of the wind power equipment industry.