Analysis of dynamic characteristics of frequency-dependent links

Abstract

The article is devoted to an experimental study of the dynamic characteristics of the four-beam frequency filter under consideration in various power consumption modes. Based on the PSpice program, a typical power supply circuit for LED lamps was modeled. The peaks of the harmonic series reflect the power of the higher harmonics relative to the fundamental harmonic. In the three-phase mode of the lighting systems switching, the filter compensating device according to the four-beam “star connection” scheme is more efficient. The experimental results showed that the content of the 3rd harmonic, when the filter of the compensating device is turned on, exceeds the permissible state standard specification by 5% only in the 6-fold asymmetry mode in the current of the main power supply. Thus, in three-phase networks, using a four-beam passive harmonic filter, it is possible to suppress the higher harmonics of non-sinusoidal voltages and currents effectively. The filtering level of the harmonic components provides a significant reduction in the non-sinusoidality of the current and, as a result, an increase in the quality of electricity, as well as a reduction in power losses in the filter compensating device, a decrease in the overall dimensions of the filter and its cost.