Offshore wind farm will become the mainstream trend and cry smart grid network bottlenecks

In the field of renewable energy, wind power has been the industry leader. At present China's wind power installed capacity reached 22.68 million kilowatts, a total generating capacity of 51.6 billion kwh. China has plans to further develop wind power, wind grid tie inverter in 2020 is expected to reach at least 150 million kilowatts of installed capacity, for in 2030 and 2050 to achieve 300 million and 500 million kilowatts, when the total amount of wind power in electricity generation accounted for 10 % and 20%.

Europe is the home of the world wind power. Even in the hardest hit by the financial crisis in Europe in 2009 also increased the 577 MW wind power capacity, compared with 373 MW in 2008, an increase of 54%. According to the European Wind Energy Association expects 2010 Europe will build 10 offshore wind farms, an increase of 10 billion watts, the equivalent of more than 2009 installed capacity increased 75%.

With the nature of the wind turbine to generate electricity generation method does not pollute the air, can be regarded as a clean energy source. And other clean energy sources, wind power is currently the most widely used renewable energy in European countries has been widely put into use.

Offshore wind farm will be the main trend

"International Electronic Business" Zhang Songgang: large-scale wind power generation and network bottlenecks requires the development of smart grids.

Zhang Songgang: large-scale wind power generation and network bottlenecks requires the development of smart grids.

From the wind power electricity price point of view, but also inexpensive compared to other new energy sources. General thermal power electricity price of about 0.3 yuan / kWh, while the price of wind power online at 0.51 yuan / kWh to 0.61 yuan / kwh, solar power is closer than the traditional price. Approachable price is wind power to get governments to vigorously promote the cause. Currently, a wind farm investment costs were converted to cost about 8,000 yuan per kilowatt / kilowatt, the total cost of investment in wind farms occupy 70% to 75% of the price per kilowatt wind turbine costs have been declining since 2007 (the beginning of 2007 : 6700 yuan / kWh; 2008: 6300 yuan average; by the end of 2009: 5,000 / kW), the average monthly there are 100 yuan / kilowatt of decline.

ADI Technical Business Manager Zhangsong Gang said that the future of wind power as technology improves, wind turbines will become cheaper and more efficient. With stand-alone wind turbine capacity increases, the same capacity need a smaller number of units, thus reducing infrastructure investment costs, thereby saving the cost of wind power.

In a variety of new energy sources, wind power technology is relatively mature, higher degree of industrialization. Star Semiconductor Co., Ltd. Jiaxing Xuhao Ping, vice president, said wind power will continue to increase the height of the tower. Increase wind power tower height can capture more wind resources to improve power converter, and increase the cost of wind power tower height than the cost of large-capacity wind turbines cheaper. With the tower of a wind turbine, increasing the length of the blade is also growing. "For a stronger ability to capture wind blade materials are increasingly high requirements." Xu Haoping added.

"International Electronic Business" Xuhao Ping: Wind farms are gradually go from the inland maritime development.

Xuhao Ping: Wind farms are gradually go from the inland maritime development.

The biggest controversy surrounding wind power is that wind farm covers an area of ​​land Jingui city is unacceptable, resulting in most of the wind farms built in the sparsely populated Northwest Territories. But densely populated coastal cities is large energy consumption, electricity load centers away from the wind farm, wind power to the transmission grid pose some obstacles. The offshore wind power development is not only close to the coastal cities than inland wind resources, and does not occupy land resources.

Zhangsong Gang said that offshore wind sprung up, and will become an important form of energy. During the World Expo in Shanghai, Shanghai Donghai Bridge offshore wind farm grid has been successfully put into use.

"Wind farms are gradually from the inland to the sea and the mainland coastal development, offshore wind farm wind power development has become a global hot spots." Xuhao Ping pointed out that "this is mainly because offshore wind resources, the greater unit capacity units installed easier to implement than the land. "

Intelligent dynamic control of wind power system

Although parts of the world are in full swing construction of wind farms, but wind power is low-density energy, with instability and randomness, so that wind power has been a challenge.

"Wind energy ultimately depends on the realization of the power grid, and to achieve and the main requirement is that the network output frequency, voltage and phase to maintain the grid line," Xu Haoping explain this requirement under constant speed and wind is relatively easy to achieve, but the reality is the wind speed and wind are constantly changing, so how will the changing wind energy is converted into a stable energy wind power generation system is the key. "Wind power early adopt pitch and transmission technology to achieve, but today's mainstream technology mainly to intelligent control technology-based."