This paper has analyzed the performance of PPM and PAM underfrequency dependence channel model, the results have shown that the PAM is better than the PPM in frequency dependence channel.
According to the requirements of synchronous speed control of series conveying belt, several patterns which could realize the synchronous speed control underfrequency conversion was analyzed.
针对多级胶带输送机同步运行要求，分析了胶带机变频拖动同步运行实现的几种模式。
3
During the design of underfrequency load shedding (UFLS) schemes, some simple models for frequency dynamics analysis are obviously inadequate since they do not take system voltage into account.