Electromagnetic Compatibility and Radiation Analysis in Control Room (original) (raw)
Related papers
Abstract – The paper presents performed calculations of maximum values of the electric and magnetic fields intensity, emitted by TS 10(20)/0.4 kV, 3x1250 kVA, obtained in software package EFC-400 that allows simulation in three-dimensional space. Calculations of effective values of the magnetic flow density (magnetic induction) and analysis of electromagnetic compatibility are obtained for height of 4.5 m above the ground surface, in the x-y plane, in parts of offices located above the substation, where the highest levels of the field intensity are expected, with a maximum current load at some equipment pieces. This load rarely appears in real operation, so the calculation results are on the side of safety. Substation is modeled without walls and other obstacles that significantly affects on the reduction of the electric field intensity. In this way, the results of the electric field intensity are largely on the side of safety, since an external wall of transformer stations damping down the same field on negligible values. These values can be verified by measuring on the substation location. The results are shown in diagrams that describes two-dimensional and three-dimensional distribution of the magnetic flow density and electric field intensity, in the continuous distribution, by using isolines. In the paper are given a recommendations for a new model of substation, by which the reduction of electromagnetic interference will be achieved. Keywords: Electromagnetic Radiation, Compatibility, Electric Field, Magnetic field, EFC 400
Modern researches of electromagnetic fields (EMF) are based on the concept that complicated theoretical investigations are resulting in appropriate design solutions, and they are almost exclusively developed as applied researches. Generally, two directions are presented. The first one is based on the simplification of numerical calculation models, and the second one is based on models of objectified physical measurements in hard conditions. In both cases, however, the result is the same objective, which can be summarized as follows: create the optimal variant of solving the impact of the EMF, both in existing and new power facilities. The paper presents the analysis of numerical calculation of the EMF of distribution substation and detailed operational measurement program, which includes all measurements in stationary state with measurement location. The analysis of calculations and measurements results must indicates the possible dangerous places and gives the recommendations of measures for elimination of electromagnetic influences or their reduction to an acceptable level, according to the Regulations.
Acta Mechanica Slovaca, 2020
This paper deals with the measurement of electromagnetic field parameters near high voltage systems, characteristics of electric field, magnetic field and electromagnetic field, as well as the possibilities of implementing measures to reduce the emitted electromagnetic field. The paper describes the measurement of electromagnetic field parameters in the vicinity of high voltage systems, the analysis and synthesis of the measurement results in the external and internal environment of particular transformer stations is evaluated. The objects of interest in these measurements were brick transformer stations for transforming AC voltage from 22 kV to 400 V and 230 V at the operating frequency of 50 Hz. With regard to the influence of electromagnetic fields in the environment, individual measurements were assessed in accordance with selected criteria.
Health-Related Electromagnetic Field Assessment in the Proximity of High Voltage Power Equipment
Applied Sciences, 2019
With respect to health issues, this paperpresents the results of an electromagnetic field (EMF) assessment in the proximity of a high voltage power station located in South Transylvania, Romania. The main parameters taken into account are, according to all standards and recommendations, the RMS (Root Mean Square) value of low frequency (0-300 Hz) electrical field strength E (in kV/m) and magnetic flux density B (in µT). Measurements were performed near all critical pieces of equipment (transformers, switches, busbars, overhead lines), according to the EMF European Directive. Some measurements were made as a function of distance from the HV (high-voltage) equipment, others as a time variation. The main objective was to verify that specific limits are met and, if necessary, to identify protective measures. Finally, safe exposure times for personnel operating at these sites were determined. In the future, detailed maps of EMF variations will be made available to the power companies.
EVALUATION OF EXPOSURE TO EMFs IN DIFFERENT LAYOUTS OF TRANSFORMER ROOMS
2007
Indoor Distribution Transformer Rooms (IDTRs) contain the following sources of EMFs: busbars, isolating switches, cables, fuses, distribution transformer and capacitor bank. These sources can be significant contributors to the magnetic field in areas both inside and outside the location fence. In the IDTRs environment, the electrical workers are exposed to the EMFs during about one working hours. For this study, the category "electrical workers" include electrical engineering technicians, electrical engineers and electricians for operation and inspection. Detailed site surveys identify EMF sources and evaluate their impact on the building, as well as, the equipment and workers in it. The technical inspection in IDTRs focuses on the connection of cables, the adequate protective devices used, the measurement of electrical parameters, the earthing, and the configuration of electrical components. Measurements of EMFs in work environment were first conducted in about 250 IDTRs ...
Identification of Electromagnetic Fields Radiation Intensity on Medium Voltage Network Equipment
Telecommunications, Computers, and Electricals Engineering Journal
This research is about how to identify electromagnetic fields radiation intensity with measuring the electric fields and magnetic fields then compare it to the radiation exposure standards for public from ICNIRP. With the experimental method directly to the 15 randomize research sites in Pontianak city, each measurement on 1 site done on 4 sides, front, back, right and left of the objects and each sides done measurement 5 times on different distance from 1 – 5 m. The objects that has been measured are Transformer, which is very high value of electromagnetic fields compare it to any other medium voltage network equipment. The results still so much lower value than the exposure standards for public, but according to Anies reference there will be some effects about this if the public been exposed to radiation for too long, there are psychological and physicalogical effects. Hopefully this research could be referred to the public to consider the dangers exposed to radiation exposure o...
Experimental Study of Electromagnetic Environment in the Vicinity of High Voltage Lines
American Journal of Engineering and Applied Sciences, 2011
Problem statement: Several studies have investigated the impact of electromagnetic field generated by high voltage power lines on environment. The evaluation of electric and magnetic field quantities are of paramount interest in the characterization of electromagnetic environment of the proposed line. The purpose of this study was to analyze the behavior of electromagnetic fields generated by power lines in an area of strong population. Approach: The method applied in this study was gradual; examined the effects of different couplings between the different neighboring lines on behavior of electric and magnetic fields. Later, these lines will be used as a source of disturbance applied to the auditory implants EMC. Results: The implications of experimental results were also compared and discussed with new standard. Conclusion: The maximum intensities of electric and magnetic fields measured for the circuit of three lines close to each other, within the El-HADJAR substation were significantly lower than the ICNIRP reference levels for occupational and no occupational exposures.
Modeling and Calculation of Electromagnetic Field in the Surroundings of a Large Power Transformer
2009 20th International Zurich Symposium on Electromagnetic Compatibility, 2009
The presented study compares measured and calculated electromagnetic field quantities in the surroundings of a large power transformer with the aim to avoid the necessity of measuring the field on subsequent units and use a computer model instead. The influences of various objects located in the vicinity of the transformer during measurement are also analyzed and are taken into account in a computer model.
Progress In Electromagnetics Research Letters, 2010
The straightforward comparison between electromagnetic environment measurements and immunity levels for industrial, scientific, and medical equipment has been used in the technical literature as an ordinary method to provide electromagnetic compatibility management within critical areas, such as hospital and industrial environments. This paper addresses a theoretical discussion concerning emission and immunity test features to focus the aforementioned problem. Finally, a more reliable comparison method is proposed, the environmental compatibility level definition, using analytical analysis and measurement results.
This study was carried out to investigate the possible risk of magnetic field radiated from the cast resin transformers of electrical service substations rated at 1500 kVA, 11/0.4 kV. The main purposes of this survey is to examine the actual radiated exposure levels for a typical cast resin transformer with current international safety standard and validated them with control environment experimentation in a laboratory. The method used in this study includes comparative analysis of measured data using EMDEX meter with EMCALC software interfaces for data acquisition purposes. Results of three relative measurements were combined in order to associate the radiation effects to the environment. The measurements carried out had involved two separate protocol conditions which are near and far fields. The final results and conclusions showed that there were slight reductions of magnetic fields exposure but not considered to be of great significance since the desired levels should be lowered...