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In the French context of increasing renewable penetration and significant nuclear power, the optimal contribution of this energy source is discussed from two viewpoints. On the one hand, from the social planner viewpoint, the nuclear optimum contribution is the one that minimizes the overall electric price, whatever the resulting load factor. The use of screening curves, often implemented to design...
The EU 20–20–20 objectives and liberalization of the market are major challenges for European transmission system operators (TSO). Especially German TSOs have already to deal with a proportion of renewable energy generation greater than the EU goals. The resulting power transits affects to every TSOs' system operation. The required grid extension projects often run into protests and opposition from...
In recent years, smart grid becomes the trend of future power systems in China and abroad. Present status and the facing challenges of electric power industries in different countries are different, and thus the understanding and the development plan of smart grid are also different from one country to another. In this paper, the motivations and implications of smart grid in USA, Europe and China...
A major power system challenge to achieving 20 percent of U.S. electric energy from wind energy is to reliably balance electrical generation and load over time with a large portion of energy coming from a variable, non-dispatchable power source. While this is a substantial challenge, with some changes in power system operation and planning, there would be no insurmountable technical barriers to achieving...
Nowadays the supply of electrical energy from dispersed generation units has an increasing significance. Hence, security related power system operation strategies have to be adapted to face the new situation. In this paper the security of power system operation from the industry and research point of view will be discussed. After presenting an overview about the current situation, the problems will...
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