Direct-drive permanent magnet wind power generation technology

- Nov 14, 2017 -


First, the technical name: Direct-driven permanent magnet wind power technology

Second, the technical categories: zero carbon technology

Third, the field and scope of application: Wind power in the field of electricity industry

Fourth, the status of the application of technology and industrialization

At present, China's variable-speed constant-frequency wind turbines mainly include doubly fed induction wind turbine and direct-drive permanent magnet synchronous wind turbine. By the end of 2013, the direct-drive permanent magnet wind power generation technology has been applied to more than 30% of the wind turbines nationwide and industrialized at 1.5MW, 2.0MW, 2.5MW and 3.0MW units. The future of the technology in the offshore wind power megawatt generator also has great potential.

Fifth, technical content

Technical principle

This technology realizes the system integration of direct drive, permanent magnet and full power converter technology. The three technologies complement each other and adapt to the change of wind speed with the rapid change of current, which can effectively reduce the mechanical wear of the unit and adapt to the fluctuation of wind speed and the demand of power grid. As a result of direct-drive permanent magnet technology, gearless box design, the unit energy consumption is l.ower than the doubly-fed wind turbine.

2.key technologies

(1) load control technology;

(2) large permanent magnet motor design technology;

(3) pitch system control technology;

(4) signal-specific acquisition technology.

Sixth, the main technical indicators

1. The annual average unit utilization rate of 99% or more;

2. The average unit transmission efficiency relative gear box drive chain unit more than 2%;

3. Can achieve zero-voltage crossing, power factor of -0.9 ~ 0.9.

Seven, technical appraisal situation

2.5MW Direct-drive Permanent Magnet Wind Turbine won the first prize of National Energy Science and Technology Progress Award in 2011, the design certification of TÜV Nord in Germany in 2012 and the design certification of Beijing Certification Center in 2013. In 2012, the technology also obtained the special safety certification, CE certification and other special certification required to enter North America, Australia and the EU market respectively, as well as occupational health and fire safety assessment.


Eight, typical users and investment returns

Typical users: China Huaneng Group, China Datang Corporation, China Huadian Corporation, China Guodian Corporation, China Power Investment Corporation, China Guangdong Nuclear Power Group Corporation, China Resources Power Group Corporation, Guohua Power Group Corporation and SDIC Power Group Company and so on.

Typical case 1

Case Name: Jinfeng Dabancheng Experimental Wind Farm Project

Construction Scale: The total installed capacity is 49,500MW wind farm project. Construction conditions: wind functional density reached seven standards, wind energy resources is better, the effective wind hour is high; regional power network planning and construction of sound improvement. Main Construction Content: 6 sets of 3.0MW and 13 sets of 2.5MW direct-drive permanent magnet wind turbines are installed. The main equipment for 2.5MW direct-drive permanent magnet wind turbine and 3.0MW direct-drive permanent magnet wind turbine. The total investment of 420 million yuan, the construction period of 1 year. The annual emission reduction of 100,000 tCO2, annual economic benefits of 63 million yuan, investment recovery period of about 7 years. The cost of emission reduction is 50 ~ 100 yuan / tCO2.

Typical case 2

Case Name: Hebei Guanting Wind Farm Project (Phase I)

Construction Scale: 49,500 kW Wind Farm. Construction conditions: the annual average wind speed of wind resources will reach 3m / s or above, the effective annual number of hours shall not be less than 1700h, and the limit wind speed of the unit can not be exceeded; and the construction of regional power grids is complete. Main Construction Content: 33 sets of 1.5MW direct-drive permanent magnet wind turbine generators are installed. The main equipment for 1.5MW direct-drive permanent magnet wind turbine. The total investment of 200 million yuan, the construction period of 6 months. Annual emission reduction of 74,000 tCO2, annual economic benefits of 50 million yuan, the investment recovery period of 4 years. The cost of emission reduction is -50 ~ -20 yuan / tCO2.

Nine, to promote the prospects and emission reduction potential

Wind power in our country still has a greater potential for development. In 2013, the new wind power grid-connected capacity in the country was 14.49 million kW. It is estimated that in the next five years, the technology will be applied to newly-added wind turbines with an installed capacity of 24 million kW, reaching a 40% promotion ratio and an annual emission reduction of 36 million tCO2.

Article from NdFeB Industry Network

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