Power Electronics for Windmill Applications
Variable speed wind turbines are extremely powerful power electronics applications. This paper introduces recommended semiconductor voltage for these applications in respect of efficiency, reliability and production costs. The resulting state-of-the-art solution today is the 1700 V silicon. High power electronics applications in megawatt ranges need numerous power semiconductors. However, even the largest semiconductors available today are still not powerful enough for some applications. Therefore, it is necessary to connect them in parallel. The parallel connection of semiconductor devices in a traditional PE circuit is very common. One proposed solution is presented here: power electronics assembly, IGBT base units, containing IGBTs & diodes, heat sinks, DC link capacitors, drivers & protection, auxiliary power supply and PWM controller (one independent unit), arranged into a three phase inverter. Such units can be connected in parallel, for example, for a 4-quadrant drive windmill with permanent magnet generator and a full- size 4 MW converter, which is presented here. This paper describes a method for obtaining higher windmill powers in the medium voltage range, using line interface connection of variable-speed, medium- voltage PM generators, without any restrictions in respect of voltage and power, and using proven semiconductors and components. Basic PE units are connected in series for higher voltages, and in parallel for higher powers.
power electronics IGBT efficiency reliability
D. Schreiber
SEMIKRON Elektronik GmbH & Co
国际会议
2007上海国际风能大会(Wind Power Shanghai 2007)
上海
英文
175-193
2007-11-01（万方平台首次上网日期，不代表论文的发表时间）