Abstract
Wind power generation is one of the most mature and most developed conditions for power generation in new energy generation technology.Large capacity and long distance offshore wind power is the trend of future wind power development.Wind power generation is one of the most mature and commercialized power generation methods in the field of renewable energy utilization.Due to the rich characteristics of offshore wind resources and the urgent need for offshore wind power development projects all over the world, the transmission and interconnection of large-scale offshore wind farms has become a hot topic in the development and research of wind power.This paper focuses on the analysis of the reactive power compensation methods for offshore wind farms, and provides a reference for the construction of offshore wind farms.
Highlights
It is generally used to use the wind energy coefficient Cp to show the efficiency of the wind turbine converting wind energy into mechanical energy.It is the function β of the tip speed ratio λ and the pitch angle of the blade paddle. It is known from the wind energy utilization factor of a typical wind turbine that when the pitch angle is fixed, the β wind energy utilization coefficient CP can only reach the maximum value CPmax
We can see that the main components of offshore wind power system are as follows: wind power stand-alone system, offshore power station, distance transmission and shore power plant
D represents the diameter of the wind wheel;VW is air velocity;Cp is the coefficient of wind energy utilization;For a fan, the wind energy absorbed depends on the wind energy utilization coefficient Cp and the wind speed VW
Summary
With the rapid development of the global economy, the demand for energy is increasing.The fossil energy is drying up, and the global environmental pollution is becoming more and more serious.The search for new renewable and clean energy has become the most important issue in twenty-first Century.Wind energy, as a clean renewable energy, has received worldwide attention in recent years, especially in the field of wind power generation[1].Various countries have stepped up a variety of policies to promote the development of the wind power industry.Wind farms can be divided into two types of land and sea.The development of the world's offshore wind power is mainly concentrated in Europe.The sea wind power has been developed in Europe for more than 20 years.In recent years, the basic development of land wind power resources in Europe, especially in Britain, Denmark, Germany and other countries has been completed.The development of marine wind power has been put on the agenda again, as the demand for reducing greenhouse gases and increasing the proportion of renewable energy.It is noteworthy that the European Union formulated the goal of renewable energy to account for 20% of the total demand and energy in 2020, and put forward the goal of offshore wind power installed capacity of 40 thousand MW by 2020[2].With the rapid development of coastal wind power resources in China, the offshore wind power industry has made substantial progress.The total installed capacity of offshore wind power in China is expected to reach 15 million kW in 2015, and it is expected to reach 30 million kW in 2020, which is equivalent to the total installed capacity of wind power in the country
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