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The following topics are dealt with: wind power industry; and nongrid connected wind power technology; offshore wind power farms; and wind power diversification.
People living in 35% of the landmass of the world have no electrical grid and they live mostly in darkness. These are the most appropriate cases for non-grid-connected wind power. Non-grid-connected wind power systems will combine with large-capacity energy storage system or high energy-loaded industries. There is a direct need to develop high capacity electrical energy storage system at cheap cost...
Wind power industry is an explosively growing industry, and wind power utilization is a sunrise industry in the new century. The application of large-scale non-grid-connected wind power throws the convention to the grid, so that the field, which could use non-grid-connected wind power, is extended. In this paper, the method of integration of production, education and research for non-grid-connected...
In this paper, the liquidus temperature of nNaF·AlF3-Al2O3-ZrO2 molten salt system was determined by thermal analysis method. The effects of molar ratio of NaF and AlF3, and ZrO2 concentration on the liquidus temperature were studied by orthogonal regression experimental design method. The results show that the trends of liquidus temperatures of melts with five different molar ratios of NaF and AlF...
With the increasing energy prices and discharge of greenhouse gas, the current energy consumption calls for large-scale application of renewable energies. Among all new types of energy, the development of wind power is so fast, only second to water energy. Jiangsu lies in an area where wind energy is abundant, especially in the Jiangsu coastal areas, which provides a large space for wind power development...
Wind power integration into the power grid is the only application mode of worldwide large-scale wind farms. The high instability of wind could cause a drastic fluctuation of wind power, which has restrained the contribution ratio of wind power to the power grid within 8-10% if there is no gas-fired power or hydro-power for peak shaving. It has become a tough worldwide problem. In the next 4-6 years...
Phases of aluminum electrolytes with additives of NaCl and KF were investigated. The definition and determination of the cryolite ratio of bath were discussed based on the results of phase composition. The deduced cryolite ratio equation was justified by fluorideion selective electrode analysis (FISEA). Experimental results show that FISEA has good performance with high accuracy and reproducibility...
As the support structure of wind turbine, the tower bears alternating loads of wind when the wind turbine runs. To ensure the reliability of the wind turbine, it's necessary to carry out modal analysis on the tower, and this would prevent the natural frequency of the tower close to the rated speed of wind turbine. In this paper, finite element analysis of the tower is solved using ANSYS, and the natural...
For the development bottleneck of wind power, based on research from the national “973” plan wind power project, this paper clarifies the content, basic research and validates the results of large-scale non-grid-connected wind power coupled with high energy consumption system. Building a Chinese characteristic large-scale non-grid-connected wind power high-energy consumption system for consuming large-scale...
This paper studied electro-deposition of carbon from LiF-NaF-Na2CO3 molten salt system. By using a cyclic voltammetry technique, the electrochemical behavior on a tungsten wire was researched in 46.2wt.%LiF-49.8wt.%NaF-4wt.%Na2CO3 molten salt at 700°C, with two platinum wires used as a counter electrode and a reference electrode, respectively. The results show that carbon is reduced at the potential...
Oilfield enterprises are large power consumption users; 40% of the power is consumed by oil pumping machines, which are widely distributed in an oil field. In the areas with rich wind energy and solar energy, directly using distributed wind power and solar power as a source for the oil pumping machine is an effective approach for saving energy and emission reduction. In the proposed distributed wind...
China has abundant wind energy resources. The total installed capacity of wind power has doubled every year in the past five consecutive years. By the end of 2009, the total installed capacity of wind power reached 26000 MW. However, there are over 9880 MW wind turbines that are not connected to the grid because of peak shaving restraint. Hydrogen has been recognized as the most promising future energy...
It is necessary to combine and integrate technologies since no single renewable energy source is sufficient to be able to stand alone. Non-grid applications will be applied as well. Because of fluctuation of wind and solar power, integration of new energy including non-grid solutions were important to offer a steady consumption of power. Proper storage and comprehensive utilization of power were needed...
For high cost, hard grid connection and low failure probability for large-scale offshore wind power, an innovate seawater desalination system is proposed. It directly couples offshore wind power with high energy-consuming seawater desalination to a new and full one. The system uses 100%off-shore wind power and adopts variable condition optimal control to maintain energy consumption per unit when fresh...
Nowadays, the power system is facing new challenges in increasing renewable energy sources' penetration. One of these problems is voltage stability in wind farms equipped with doubly fed induction generators (DFIGs) during grid faults. Flexible AC Transmission System (FACTS) devices can be used for this problem. This paper, investigates the Static Synchronous Compensator (STATCOM) application to achieve...
The paper extends Hodger-Dowell's partial differential equations of blade motion, by building a new blade model of large horizontal axis turbines including the effects from gravity, pitch action, pre-twist and rotor speed. New equations also build an aerodynamic model using analysis of properties of air density, blade thickness and wind speed. All partial differential equations are approximated by...
With the rising of energy prices and greenhouse gas emissions, new and renewable energy demand is increasingly urgent. The development of wind power is the fastest new and renewable energy area. Large-scale application and natural characteristics of wind power have directed that wind power market must take a diverse development path. Non-grid connected wind power system development is the diversified...
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