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首页> 外文会议>2017 13th International Electrical Insulation Conference >Ageing behaviour and temperature rise in end corona protection layer for high voltage machines subjected to converter-like voltages
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Ageing behaviour and temperature rise in end corona protection layer for high voltage machines subjected to converter-like voltages

机译：承受类似转换器电压的高压电机的末端电晕保护层的老化行为和温度上升

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The concern of energy consumption regarding the usage of rotating electrical machines, has in recent years made a major impact on the market for converter driven high voltage machines. Converter driven machines may better adjust the output power to the need of the load, in comparison to line-fed machines, and thereby save energy. Throughout the years the corona protection system of high voltage rotating electrical machines has been developed to have good field grading properties and low temperature rise at operations under normal power frequency voltages. Today, knowledge on how the corona protection system is affected by voltage stresses generated by the converter/motor set-up is advancing. Over the years, this topic has attracted many researchers and it is a common understanding that a converter voltage containing pulses with short rise time and high repetition frequency will affect both the temperature and voltage distribution along the corona protection system [1-4]. For some applications, the development of high voltage converters has gone from 2-level and 3-level converter topology to multi-level topology, which has changed the voltage wave-shape from a more square-wave voltage to a sinusoidal looking voltage superimposed with a ripple of pulses, see Figure 1. In order to test the performance of the corona protection system under more realistic conditions, testing with a converter-like voltage is preferable.
机译：近年来，关于旋转电机的使用的能量消耗的关注已经对​​转换器驱动的高压电机的市场产生了重大影响。相较于线馈电机，变频器驱动的电机可以更好地根据负载的需求调节输出功率，从而节省能源。多年来，已开发出高压旋转电机的电晕保护系统，使其在常规工频电压下运行时具有良好的电场分级特性和低温上升特性。如今，关于电晕保护系统如何受转换器/电动机设置所产生的电压应力影响的知识正在发展。多年来，这个话题吸引了许多研究者，并且一个普遍的理解是，包含具有短上升时间和高重复频率的脉冲的转换器电压会影响电晕保护系统的温度和电压分布[1-4]。对于某些应用，高压转换器的发展已从2级和3级转换器拓扑变为多级拓扑，从而将电压波形从更多的方波电压变为叠加了正弦波的正弦电压。脉冲纹波，请参见图1。为了在更实际的条件下测试电晕保护系统的性能，最好使用类似转换器的电压进行测试。

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