The Space Station Freedom power distribution system, which consists of dual redundant 20 kHz, 440 V RMS, single-phase power systems, is discussed. The effect of a typical space station nonlinear load on the measurement of RMS current and voltage at various points in the Space Station power system has been investigated using the Electromagnetic Transients Program (EMTP). The load current distortion at the user interface, its effect on the distribution system, and its relationship to power factor have been studied. Modeling results are compared to test data. The differences under nonlinear loading are evaluated and presented as a measure of distribution voltage distortion and current measurement accuracy.
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机译：讨论了由双冗余20 kHz，440 V RMS单相电力系统组成的空间站自由电力分配系统。已使用电磁暂态程序（EMTP）研究了典型空间站非线性负载对空间站电源系统中各个点的RMS电流和电压测量的影响。已经研究了用户界面上的负载电流失真，其对配电系统的影响及其与功率因数的关系。将建模结果与测试数据进行比较。评估非线性负载下的差异，并将其表示为配电电压失真和电流测量精度的量度。
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