The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A high efficiency wind power converter, mainly constructed by the proposed duty boundary condition boost converter (DBC-BC) is proposed in this paper. It can work in the high efficiency duty cycle to effectively increase the efficiency of wind power converter. A 3kW prototype is designed and implemented to assess the performance of the proposed DBC-BC. Experimental results show that a wind power converter...
Due to growing number of wind turbines (WT) within a wind farm (WF) scheduling of maintenance of turbines within the WF becomes challenging issue. Also, in instances when wind energy curtailments are required it can be difficult to decide which turbines should be shut down first. In this paper, a probabilistic methodology is presented to identify WT in the WF that face higher and lower wind speeds...
Chip technologies are developed, which introduce an IGBT with a trench cell and field stop technology for 1200 V up to 6500 V voltage applications. For wind power 1200 V and 1700V IGBT 4th generation optimized for low, medium and high power in combination with a new package concept PrimePACK™ will be described. For the 6.5 kV voltage class significant trade off improvements of the on state losses...
Offshore wind farms are facing challenges which call for redesigning the electrical drive train of future wind turbines. The turbines are expected to increase in power, and plans for 10-15 MW wind turbines have been reported. Hence will a medium-to high voltage converter solution be highly beneficial. Additionally, a DC-distribution grid is discussed for offshore applications. This indicates that...
With a series problems such as global energy and resource shortage, several countries have begun to increase investment for new energy development. Because wind energy is renewable, clean and pollution-free, it is widely used in the entire world. Offshore wind farm does not take up valuable land resources, and the sea has abundant wind energy resources so that the wind turbine can achieve greater...
The paper proposes an adaptive sliding observer to accurately estimate the rotor position for a direct-drive permanent magnet synchronous generator (PMSG). Without any position sensor, the generator torque and flux responses retain high performance both in the steady state and during transients. The problem on the shaft encoder installation difficulty, reliability and disturbance in encoder cable...
In parallel converters applications, direct parallel topology was respected because of the advantages of small size, low cost, simple structure and easy to extend. However, the coupling effects maybe exist because the parallel converters are connected by non-isolated mode. In this paper the average model was proposed in the rotating coordinate system. As the entire system is a symmetric structure,...
The paper summarizes conclusions following from the research of utilization of wind power plants in the Czech Republic. Situation in the planned and real shares of renewable sources with more detailed specification of the opportunities for development of wind power plants is described specifically. The paper also presents the results of analysis of operational statuses of the most frequently used...
According to the latest report, the US has been the fastest growing wind power market in the world for the past few years. Wind projects accounted for more than one third of all new US electric generating capacity in 2007, and are on a projected track to becoming a convincing contributor to the US power mix. The Department of Energy estimates that wind power will generate 20 percent of nation's electricity...
The exigencies created by the shortage of energy supplies and the ever-growing air pollution stress the need for an alternative solution to the on-board power generation. The purpose of this paper is to develop a novel switched reluctance wind power generator (SRWPG) system for electric vehicles (EVs), which can convert the wind power into electric power so as to charge a battery or support other...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.