Principle of Tracking of the Static Power Frequency Changers using Moments

The paper considers some aspects of tracking of the output current standard of the Static Power Frequency Changers. The problem lies in the right choice of the one voltage phase of the network. Such a choice is based on prediction of the current of the loading. Discussed predicting control minimize the interval-by-integral quality index and the number of the commutations of the switching semiconductors. The paper also presents the properties of the moments and momentary transformation which facilitates such a control.