Diophantine equation based model of data transmission errors caused by interference generated by DC-DC converters with deterministic modulation

Abstract

Abstract. The assurance of the electromagnetic compatibility of sensitive smart metering systems and power electronic converters, which introduce high-level electromagnetic interference is important factor conditioning reliable operation of up to date power systems. Presented experimental results have shown that currently binding, frequency domain tests are ineffective for the evaluation of data transmission error hazards. The proposed in this paper mathematical, time-domain model, based on Diophantine equation, enables evaluation of data transmission errors caused by interference introduced by DC-DC power electronic interfaces with deterministic modulation. In the paper there have been presented possible application areas for the proposed model. Thus, evaluation of the probability of the appearance of data transmission errors, caused by interference generated by power electronic converters, is important for both cognitive and technical reasons. Elaboration of the presented mathematical model has enabled explanation of significant differences in experimentally obtained distributions of awaiting times for data transmission errors caused by interference generated by a DC-DC converter with random [9-11] and deterministic modulation. The evaluated probability of the appearance of data transmission error may become a useful factor supporting the development of data transmission systems.The DC-DC converter was selected as an interference source for mathematical analyses of data transmission errors caused by interference generated by converters with deterministic modulation. A detailed description of the interference introduced by a DC-DC converter [12][13][14] has been presented in our previous paper [15]. Deterministic vs. random modulation of power electronic interfacesRandom modulation of power electronic interfaces is often recommended as an EMI reduction technique [16,17]. In fact the utilization of random modulation does provide ostensible reduction [18,19] of the interference levels measured, in accordance with EMC standards, in the frequency domain. Fig. 1 shows the experimental results for conducted emission generated by a DC-DC converter with deterministic and random modulation, measured using average detector, in accordance with the EN 55022 standard, with the upper limit of the frequency range reduced from 30 MHz to 5 MHz for better clarity of the results.

The Effect of EMI Generated from Spread-Spectrum-Modulated SiC-Based Buck Converter on the G3-PLC Channel

“…In [24], a model is present that illustrates that the SSM and non-SSM have the same effect on the performance of the RS 232 protocol. In addition, some studies have confirmed there is no difference between the conventional PWM and SSM, and it has been shown that ostensible reduction of the EMI level generated by spread spectrum modulated converters results from the methodology of the EMI spectrum measurement [25,26].…”

Positive output elementary Luo converter for fixed-frequency ZVS operation

“…Time t 4 -t 6 gives the main gate pulse duration. Resonant inductance current is increased to its maximum at time t 5 . This mode includes linear recovering interval and pumping.…”

“…Systematic descriptions of basic POELC, variable-frequency ZVS-POELC, and fixed-frequency ZVS-POELC make an impact on the understanding of related concepts by the researchers in this field. At high switching frequencies, these hard-switched converters suffer from high switching stress, high switching power losses, reduced reliability and electromagnetic interference (EMI) [5]. To overcome these difficulties, soft-switching techniques like zero-voltage switching (ZVS) have been introduced in LCs [6][7][8].…”

Deterministic vs. Random Modulated Interference on G3 Power Line Communication

“…Therefore, many researchers choose an experimental approach by studying the impact of real sources (power electronic converters) on the operation of existing communication systems, specifically with the conventional deterministic modulation (DetM) [13][14][15]. In [13], where the communication data transmission errors in the RS232 communication protocol were addressed based on the effect of the power converter modulation, the study presents a mathematical model for estimating the percentage of data transmission errors relative to the switching frequency. In [15], the study addressed the influence of power converter cables in the induction motor drive system on RS485 communication.…”

“…However, low numbers of studies have been conducted to check the practical effect of the RanM on telecommunication devices [20,21]. Some studies confirm no difference between the DetM and RanM, especially in the uncoded communication systems, where the observed statistics of communication error are comparable or inconclusive [13,21]. It has also been shown that the reduction of the EMI level provided by randomly modulated converters results from the methodology of measurement.…”