Multi-pole permanent magnet synchronous generator wind turbines' grid support capability in uninterrupted operation during grid faults
ABSTRACT Emphasis in this paper is on the fault ride-through and grid support capabilities of multi-pole permanent magnet synchronous generator (PMSG) wind turbines with a full-scale frequency converter. These wind turbines are announced to be very attractive, especially for large offshore wind farms. A control strategy is presented, which enhances the fault ride-through and voltage support capability of such wind turbines during grid faults. Its design has special focus on power converters' protection and voltage control aspects. The performance of the presented control strategy is assessed and discussed by means of simulations with the use of a transmission power system generic model developed and delivered by the Danish Transmission System Operator Energinet.dk. The simulation results show how a PMSG wind farm equipped with an additional voltage control can help a nearby active stall wind farm to ride through a grid fault, without implementation of any additional ride-through control strategy in the active stall wind farm.
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ABSTRACT: The aim of this article is to investigate the market penetration and share of different wind turbine concepts during the years 1995–2004, a period that represents the maturational era of the modern wind power industry. A detailed overview is given based on suppliers' market data and concept evaluation for each individual wind turbine type sold by the Top Ten suppliers over the selected decade. The investigation is processing information on approximately 160 wind turbine types from 22 different manufacturers that have featured in the Top Ten list of wind turbine suppliers during 1995–2004. The analysis is based on comprehensive data covering approximately 97% of the cumulative wind power installed worldwide at the end of 2004. The article also provides an overall perspective on contemporary wind turbine concepts, classified with respect to both their speed control ability and power control type. Current and future trends for wind turbine concepts are discussed. Copyright © 2006 John Wiley &Sons, Ltd.Wind Energy 12/2006; 10(1):81 - 97. · 1.44 Impact Factor
Conference Proceeding: Control method of a braking chopper to reduce voltage unbalance in a 3-level chopper[show abstract] [hide abstract]
ABSTRACT: In this paper, the problem of unbalance between the input voltages of a multilevel converter is analysed. To reduce the problem, particularly in braking operations, a feed-forward control method is proposed in the paper. The braking chopper is displaced between the LC chopper output filter and the load. It is switched on when the DC-link voltage becomes higher than a prefixed limit value, its frequency carrier is chosen by analysing the analytical model of the system, in order to reduce the voltage unbalance of the 3-level chopper input capacitors. The proposed control method is tested by simulation. Experimental tests have been started and the results will be presented to show the performance of the feed forward control method.Industrial Technology, 2004. IEEE ICIT '04. 2004 IEEE International Conference on; 01/2005
- Wind Engineering. 01/2006; 30(3):255-263.