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

Energies ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3698 ◽  
Author(s):  
Hermes Loschi ◽  
Robert Smolenski ◽  
Piotr Lezynski ◽  
Douglas Nascimento ◽  
Galina Demidova
Keyword(s):  
Power Systems ◽  
Electromagnetic Interference ◽  
Electromagnetic Compatibility ◽  
Low Frequency ◽  
Power Electronic ◽  
Laboratory Setup ◽  
Measuring Techniques ◽  
Random Modulation ◽  
Multiple Power ◽  
Harmonic Components

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.

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

2016 ◽  
Vol 64 (3) ◽  
pp. 575-580 ◽  
Author(s):  
J. Bojarski ◽  
R. Smolenski ◽  
P. Lezynski ◽  
Z. Sadowski
Keyword(s):  
Power Systems ◽  
Diophantine Equation ◽  
Data Transmission ◽  
Electromagnetic Interference ◽  
Electromagnetic Compatibility ◽  
Transmission Error ◽  
Domain Model ◽  
Power Electronic ◽  
Transmission Errors ◽  
Evaluation Of Data

AbstractThe 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.

scholarly journals Line voltage asymmetry in closed electrical networks with distributed generation as a source of electromagnetic interference

2021 ◽  
Vol 2131 (5) ◽  
pp. 052004
Author(s):  
A Antonov ◽  
D Ivanov ◽  
Y Denchik ◽  
E Ivanova ◽  
M Ivanov ◽  
...  
Keyword(s):  
Distributed Generation ◽  
Electromagnetic Interference ◽  
Electromagnetic Compatibility ◽  
Low Frequency ◽  
Electrical Network ◽  
Technical Equipment ◽  
Electrical Networks ◽  
Electronic Resource ◽  
Voltage Unbalance ◽  
State Registration

Abstract The article reveals relevance of the problem of unbalance of line voltages in closed electrical networks with distributed generation as a source of electromagnetic interference, in particular, the problem of electromagnetic compatibility of coastal and ship technical equipment. There is presented mathematical description of the process of occurrence of conductive low-frequency EMF by the voltage unbalance coefficient in the reverse sequence and an algorithm for finding it; using the equations, parameters of this coefficient are described, such as mathematical expectation, standard deviation, probability of occurrence for the billing period, as a result, a computer program has been developed to calculate these parameters; a method for processing the obtained data of power quality indicators according to the found coefficient has been developed; an algorithm for balancing voltages in an electrical network based on finding the most optimal power supply scheme for end consumers (certificate of state registration of an electronic resource No. 23664).

scholarly journals Chaos versus EMI: Methodologies and Practice

2019 ◽  
Vol 29 (12) ◽  
pp. 1930033
Author(s):  
Yuhong Song ◽  
Junying Niu ◽  
Zhong Li
Keyword(s):  
Circuit Design ◽  
Electromagnetic Interference ◽  
Electromagnetic Compatibility ◽  
Power Electronic ◽  
Power Electronic Converters ◽  
Daily Lives ◽  
Practical Applications ◽  
The Past ◽  
Spectrum Feature ◽  
Continuous Power

This paper gives a review on the methodologies of using the continuous power spectrum feature of chaos to suppress electromagnetic interference (EMI), which have been extensively studied in the past 15 years, and their practical applications in power electronic converters of various topologies and powers, which have been widely employed in various electrical and electronic devices in our daily lives and thus form the main sources of EMI. This paper not only points out that chaotic modulation is effective and feasible in improving the electromagnetic compatibility (EMC) of various types of power electronic converters, but also gives the circuit design methodologies for different kinds of converters, especially the design methods of modules and chips. It can serve as a guide for engineering applications.

Research on Conducted EMI in Power Converter

2012 ◽  
Vol 516-517 ◽  
pp. 1808-1811
Author(s):  
Bin Liang
Keyword(s):  
Electromagnetic Interference ◽  
High Frequency ◽  
Low Frequency ◽  
Power Converter ◽  
Power Electronic ◽  
Frequency Bandwidth ◽  
Differential Mode ◽  
Three Phase ◽  
Electronic Switches ◽  
Conducted Emi

This paper researches differential mode (DM) conducted electromagnetic interference (EMI) in rectifier. The DM interference source generated by power electronic switches is given. Based on experimental and theoretical analysis, the conducted EMI of a three-phase rectifier is studied systematically. The study shows that it changes with resistance loads in low frequency ranges, while in high frequency bandwidth, the effect of change of the resistance load on the DM EMI is not obvious. The validity of the models is confirmed by the measurements.

scholarly journals Black-Box Modelling of Low-Switching-Frequency Power Inverters for EMC Analyses in Renewable Power Systems

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3413
Author(s):  
Lu Wan ◽  
Abduselam Hamid Beshir ◽  
Xinglong Wu ◽  
Xiaokang Liu ◽  
Flavia Grassi ◽  
...  
Keyword(s):  
Power Systems ◽  
Electromagnetic Interference ◽  
Low Frequency ◽  
Black Box ◽  
Switching Frequency ◽  
Frequency Range ◽  
Negative Sequence ◽  
Renewable Power ◽  
Zero Sequence ◽  
Power Inverters

Electromagnetic interference (EMI) from renewable power systems to the grid attracts more attention especially in the low-frequency range, due to the low switching frequency of high-power inverters. It is significantly important to derive EMI models of power inverters as well as to develop strategies to suppress the related conducted emissions. In this work, black-box modelling is applied to a three-phase inverter system, by implementing an alternative procedure to identify the parameters describing the active part of the model. Besides, two limitations of black-box modelling are investigated. The first regards the need for the system to satisfy the linear and time-invariant (LTI) assumption. The influence of this assumption on prediction accuracy is analysed with reference to the zero, positive and negative sequence decomposition. It is showing that predictions for the positive/negative sequence are highly influenced by this assumption, unlike those for the zero sequence. The second limitation is related to the possible variation of the mains impedance which is not satisfactorily stabilized at a low frequency outside the operating frequency range of standard line impedance stabilization networks.

scholarly journals THE CHANGE OF CARDIOSTIMULATION DEVICE PROGRAMMING DUE TO DETECTION OF ELECTROMAGNETIC INTERFERENCE

2020 ◽  
Vol 50 (2) ◽  
pp. 65-68
Author(s):  
Jan Morava ◽  
Aleš Richter
Keyword(s):  
Electromagnetic Interference ◽  
Electromagnetic Compatibility ◽  
Low Frequency ◽  
External Source ◽  
Cardiac Implantable Electronic Devices ◽  
Clinical Episode ◽  
Device Placement ◽  
Interference Signals ◽  
Device Programming ◽  
Frequency Harmonic

The study deals with the interdisciplinary topic of the electromagnetic compatibility of the cardiac implantable electronic devices that are used in patients with a defect of heart conduction system. We are focusing on the detection of disturbing signals on electrodes of cardiostimulation device and its interpretation. The detection of electromagnetic interference (EMI) is related to electrode choice, device placement, its configuration and programming. The aim of the study is the analysis of the pacemaker response in the presence of an external source of the disturbance fields. We point to possible risks of its interaction and discuss mechanisms that can influence the pacemaker sensitivity to EMI. Due to improper signal detection, the device programming changes can occur. We present an experiment of the exposure of the cardiostimulation system to a low-frequency harmonic interference signals and finally we analyse similar clinical episode and discuss proper functioning of the pacemaker.

Analysis of Electromagnetic Compatibility about Air-Power-Off of Aircraft Power System

2012 ◽  
Vol 503-504 ◽  
pp. 983-986 ◽  
Author(s):  
Guo Qiang Sun ◽  
Gang Guo ◽  
Yong Bo Yang ◽  
Dong Ping Yang ◽  
Jian Feng Zhang
Keyword(s):  
Power Systems ◽  
Electromagnetic Interference ◽  
Electromagnetic Compatibility ◽  
Electromagnetic Environment ◽  
Digital Controllers ◽  
Air Power ◽  
Input And Output ◽  
Ac Power ◽  
Signal Input ◽  
Airborne Electromagnetic

At present, main AC power systems of advanced fighters all apply digital controllers with microprocessors. The signal input and output circuits are vulnerable to the effects of electromagnetic interference, which may cause air-power-off fault. The paper analyzes the electromagnetic environment on the aircraft, discusses the airborne electromagnetic compatibility by comparing domestic and international contents and limitations of the electromagnetic standard. Furthermore, it proposes measures to resolve the electromagnetic compatibility

Selected conducted electromagnetic interference issues in distributed power systems

2009 ◽  
Vol 57 (4) ◽  
pp. 383-393 ◽  
Author(s):  
R. Smoleński
Keyword(s):  
Power Systems ◽  
Electromagnetic Interference ◽  
Electromagnetic Compatibility ◽  
Power Transformer ◽  
Frequency Converter ◽  
Electric Grid ◽  
Distributed Power ◽  
Medium Voltage ◽  
Distributed Power Systems ◽  
Four Quadrant

Selected conducted electromagnetic interference issues in distributed power systemsThis paper addresses the specific issues associated with electromagnetic compatibility that should be taken into account at the developmental stage of distributed systems. The main aim is to establish how far conducted interferences can penetrate the electric grid and how the group of converters, which individually meet EMC standards, influence the mains supply. The measured results of the spread of electromagnetic interference (EMI) current over a typical local electric grid and the low and medium voltage side of the power transformer are presented. The commonly applied, in distributed power systems, four-quadrant converter has been used as a test interference source. The limitations in the applicability of standardized methods for evaluation of aggregated conducted interferences have been presented in a system consisting of a group of two-quadrant frequency converter drives.

scholarly journals FPGA-Based System for Electromagnetic Interference Evaluation in Random Modulated DC/DC Converters

Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2389 ◽  
Author(s):  
Hermes Loschi ◽  
Piotr Lezynski ◽  
Robert Smolenski ◽  
Douglas Nascimento ◽  
Wojciech Sleszynski
Keyword(s):  
Fixed Point ◽  
Electromagnetic Interference ◽  
Electromagnetic Compatibility ◽  
Probability Density Functions ◽  
Density Functions ◽  
Power Electronic ◽  
Power Electronic Converters ◽  
Control Techniques ◽  
Programming Tools ◽  
Field Programmable

Field-Programmable Gate Array (FPGA) provides the possibility to design new “electromagnetic compatibility (EMC) friendly” control techniques for power electronic converters. Such control techniques use pseudo-random modulators (RanM) to control the converter switches. However, some issues connected with the FPGA-based design of RanM, such as matching the range of fixed-point numbers, might be challenging. The modern programming tools, such as LabVIEW, may facilitate the design process, but there are still fixed-point operations and limitations in arithmetic operations. This paper presents the design insights on the FPGA-based EMC friendly control system for DC/DC converter. Probability density functions (PDF) are used to analyse and improve pseudo-random algorithms. The theoretical algorithms, hardware details and experimental results are presented and discussed in terms of conducted electromagnetic interference emission.

scholarly journals ANALYSIS OF VOLTAGE NON-SINUSIDALITY IN POWER SUPPLY SYSTEMS WITH INDUCTION HEATING UNITS

2021 ◽  
pp. 122-133
Author(s):  
Dmitriy Yu. Rudi ◽  
Sergey V. Gorelov ◽  
Aleksandr I. Antonov ◽  
Mikhail G. Vishnyagov ◽  
Aleksandr A. Ruppel
Keyword(s):  
Electromagnetic Interference ◽  
High Performance ◽  
Low Frequency ◽  
Electrical Energy ◽  
Electrical Network ◽  
Electrical Networks ◽  
Harmonic Voltage ◽  
Harmonic Components ◽  
Quality Of Electrical Energy

The importance of the problem of improving the quality of electrical energy grew along with the development and widespread introduction of various high-performance technological installations in production, such as arc steel-making furnaces, welding installations, induction furnaces, etc. in accordance with the requirements of the standard GOST 30804.4.7–2013 and in accordance with the measurement program. A method for processing the research results obtained during the experiment is described. All power quality indicators are processed using computer programs created in the Labview graphical programming environment. The analysis of indicators of the quality of electrical energy to the requirements of GOST 32144-2013 was carried out, according to the results of which conductive low-frequency electromagnetic interference was detected in the 0.4 kV electrical network according to the coefficient of the n-th harmonic voltage components. The obtained values ​​of the indicators of the quality of electrical energy, characterizing the coefficient of the n-th harmonic components of the voltage, confirm the need to use technical means to reduce the influence of higher harmonics on electrical networks.

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