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Offshore wind farms using medium voltage DC power collection promise an increase in efficiency and a reduced bill-of-material cost. One of the key components is the high power, medium voltage DC/DC converter located in the wind turbines. There are many suggested topologies in the state of the art, but they are all still at an immature technology level, as no substantial experience from full-scale...
This paper deals with the low voltage ride through (LVRT) capability of a wind farm comprises different arrangements of the fixed speed and variable speed turbines. Based on the grid code requirements it is seemed that the hybrid topologies can provide better performances than purely either fixed or variable speeds turbines during the fault conditions using DFIG or SCIG. In the hybrid topology two...
This paper presents a converter topology for the realisation of high power grid simulators. This can be used for highly flexible simulation and testing of the grid compliance of renewable energy conversion systems, even for the certification procedure of the electrical characteristics.
Fault-tolerant permanent magnet synchronous generator drives might play an important role in improving the reliability and availability levels of the modern wind turbines. However, the acceptance by the wind turbine industry will be low if its implementation cannot be accomplished in a cost-effective way. In this paper, a low-cost fully integrated fault-tolerant converter with the ability to handle...
The classical approach based on low-voltage converter is commonly employed a low-frequency transformer (inside or outside the nacelle) of wind turbine system. Because of the heave weight and large size of the transformer, the turbine can be expensive and complex for installation and maintenance. As an alternative approach to achieve a compact and light wind turbine a medium-voltage converter using...
This paper presents a comprehensive review of existing research and development work on Voltage Sourced Converter (VSC) based HVDC systems. In addition to providing an overview of the state of the art, an extensive bibliography of the existing literature is provided. Throughout the paper numerous areas of open research are also identified to promote future development of this promising technology.
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