Five level GTO inverters for large induction motor drives
Five level GTO inverters for large induction motor drives
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用于大型感应电机驱动的五电平 GTO 逆变器
DOI：
10.1109/ias.1993.298889
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
J. Steinke
中科院分区：
文献类型：
--
作者：
R. Menzies;P. Steimer;J. Steinke
研究了五电平GTO（门极可关断晶闸管）电压源逆变器在大型异步电动机驱动系统中的应用。这种驱动器的优点在于，可以在每一级使用单个GTO晶闸管，从而避免了串联晶闸管的需要。通过直流电源电容器的箝位作用，热敏电阻器能够很好地防止过电压。缺点是每个DC电平需要单独的电源，在五电平逆变器的情况下需要四个，并且设备负载不相等。作者回顾了五电平逆变器的基本操作和可能的PWM电压/频率控制技术的感应电动机驱动器的具体应用。仿真结果清楚地表明，不平等的设备负载和独立的电压供应的五个级别的需要。结果表明，几种PWM技术的组合提供了最佳的解决方案，为驱动器的应用。结果表明，采用目前市场上可买到的4.5kV、3.0kA GTO晶闸管的五电平逆变器，可为22 MVA、7.46kV的大型感应电动机供电。<<ETX>>
The use of a five-level GTO (gate turn-off thyristor) voltage sourced inverter for large induction motor drives is investigated. The advantages of such a drive are that single GTO thyristors may be used at each level, thereby avoiding the need for series connection of the thyristors. The thyristors are well protected from overvoltages by the clamping action of the DC supply capacitors. The disadvantages are that each DC level requires a separate supply, four in the case of the five level inverter, and the devices are not equally loaded. The authors review the basic operation of the five level inverter and possible PWM voltage/frequency control techniques for the specific application of induction motor drives. Simulation results clearly show the unequal loading of the devices and the need for independent voltage supplies for the five levels. It is shown that a combination of several PWM techniques offers the best solution for the drives application. It is found that large induction motors with ratings up to 22 MVA, 7.46 kV may be supplied by the five-level inverter using presently available 4.5 kV, 3.0 kA GTO thyristors.<<ETX>>