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首页> 外文会议>2017 13th International Electrical Insulation Conference >Measuring partial discharge on operating motors with VS-PWM drives
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Measuring partial discharge on operating motors with VS-PWM drives

机译：使用VS-PWM驱动器测量正在运行的电动机上的局部放电

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Partial discharge (PD) testing is an important tool for assessing the condition of the high voltage insulation in motor and generator stator windings. In the past several years, many motors have been powered from inverters which facilitate variable speed motor operation. The most common type of drive being used nowadays is the voltage source, pulse width modulation (VS-PWM) type. Drives rated up to 13.8 kV are becoming more common in natural gas compressor plants, as well as other petrochemical facilities. Such drives generate high voltage spikes in the kV range with rise times in the sub-microsecond range. These high voltage spikes are a form of severe electrical interference that can make the detection of partial discharge difficult, due to the overlapping frequency content in PD and in the spikes that are 1000 times higher in magnitude. Thus, PD detection on medium voltage VS-PWM systems has been a challenge, in spite of the serious stator winding insulation ageing that the impulse output such drives may cause to their driven motors.
机译：局部放电（PD）测试是评估电动机和发电机定子绕组中高压绝缘状况的重要工具。在过去的几年中，许多电动机都由逆变器提供动力，这有助于变速电动机的运行。当今最常用的驱动器类型是电压源，脉冲宽度调制（VS-PWM）类型。在天然气压缩机厂以及其他石化设施中，额定电压高达13.8 kV的驱动器变得越来越普遍。这种驱动器会产生kV范围内的高压尖峰，上升时间则在亚微秒范围内。这些高电压尖峰是严重的电干扰形式，由于PD和尖峰幅度中的重叠频率含量高1000倍，这会使部分放电检测变得困难。因此，尽管定子绕组绝缘老化严重，这种驱动的脉冲输出可能会对它们的驱动电机造成影响，但在中压VS-PWM系统上进行PD检测仍然是一个挑战。

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