Aggregated Conducted Electromagnetic Interference Generated by DC/DC Converters with Deterministic and Random Modulation

Abstract

The assessment of electromagnetic compatibility (EMC) is important for both technical and legal reasons. This manuscript addresses specific issues that should be taken into account for proper EMC assessment of energy systems that use power electronic interfaces. The standardized EMC measuring techniques have been used in a laboratory setup consisting in two identical DC/DC converters with deterministic and random modulations. Measuring difficulties caused by the low frequency envelopes, resulting from frequency beating accompanying aggregation of harmonic components of similar frequencies, were indicated as a phenomenon that might lead to significant problems during the EMC assessment using currently binding standards. The experimental results describing deterministic and random modulated converters might be useful for practitioners implementing power interfaces in microgrids and power systems as well as for researchers involved in EMC assurance of power systems consisting in multiple power electronic interfaces.

Low-Frequency Envelope of DC/DC Converters due Differences in the Control Hardware Features

“…In [7] is showing that for voltage mode-controlled converters, there will be a low-frequency EMI component. Also, [4] and [8] indicate the low-frequency envelopes, resulting from frequency beating accompanying aggregation of harmonic components of similar frequencies.…”

“…Hence a non-convergence between the operation of power electronic converters, into parallel electrical installations topologies, and the EMC requirements begin to be evident. Mainly because many of the reported phenomena by [4], [6]- [8], may come from changes in time-domain, such as time displacement between control signals, and the difference in power conversion equipment clock signals, once each crystal oscillator provides one specific frequency stability.…”

A Simulation for Parameters Extraction of Double-Layer Shielded Power Cable using FEA

“…Despite the possibility to overcome EMC issues in other environments by applying switching techniques [5] or adding EMI filters, the space in a vehicular environment is quite limited [6] and integrating another component to perform those actions is not an option. In addition, the ground system is restricted to the vehicle metallic body.…”

On Stability of Perturbed Nonlinear Switched Systems with Adaptive Reinforcement Learning

“…Many power electronic converters play a remarkable role in industrial applications, such as electrical drives, renewable energy systems, etc. [1][2][3][4][5]. The modelling technique in power electronic converters is usually implemented by considering the average small-signal analysis.…”