EMF-ELF-2011

10th Conference BH K CIGRÉ

27.09.2011. Sarajevo, Bosnia and Herzegovina

2nd ROUND TABLE

POWER FREQUENCY ELECTROMAGNETIC FIELDS

ELF – EMF

LEGISLATIVE

REPORT FROM 2nd INTERNATIONAL CONFERENCE: Extremely Low

Frequency Electric and Magnetic Fields,

Paris, France 24 - 25 March 2011

B. Dalle – France

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March 24&25 -EMF-ELF-2011 CONCLUSIONS – SARAJEVO September 27th, 2011

• 5 SESSIONS :

• Session A : Characterization, calculation and measurement of EMF induced by AC or DC installations

• Session B : Mitigation techniques for EMF & contact (induced) currents

• Session C : Biological effects of AC & DC installations

• Session D : Evolution of international standards, guidelines and requirements

• Session E : Risk, knowledge and information management

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March 24&25 -EMF-ELF-2011 CONCLUSIONS – SARAJEVO September 27th, 2011

• Main figures :

• 60 papers from 21 countries : Au, Be, BH, Br, Ca, Ch, Den, Fr, Ge, Gr, It, Jap, Kor, NTH, Ro, Se, Sl, SA, Sp, UK, USA

• 160 participants from 30 countries;

• Tutorial from Alexandre LEGROS (C-O-01) from Lawson Health Research Institute published in Electra as a scientific paper in Electra June 2011;

• Opening speech of French Senator Daniel RAOUL published as an invited paper in Electra June 2011.

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EMF-ELF-2011 : Session A

Characterisation & Measurement SESSION A

“EMF Characterisation and measurement”

Session Chair: Jean Hoeffelman Session Reporter: François Deschamps

PRESENTER SESSION “A” PAPERS

Frederic LESUR

TUTORIAL : Conductor Management of Underground Cable Systems

Calin MUNTENU

Recent Advances on Electromagnetic Field Distribution Analysis inside High Voltage Substations

Mattia PAZIENZA

Experience of HVDC Interconnection Italy-France called “Piemonte-Savoie” Problems connected with EMF – ELF - Study of interferences with other services in tunnel

Tiebing LU

Analysis of Electric Field and Ion Current Density under DC Lines with Corona Discharge

Pieter PRETORIUS

On the behaviour of the electric field gradient along the ground wire of a ± 350 kV HVDC line

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EMF-ELF-2011 : Session A

Characterisation & Measurement

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SESSION A “EMF Characterisation and measurement”

Session Chair: Jean Hoeffelman

Session Reporter: François Deschamps

PRESENTER Poster SESSION

Aleksandar PAVLOVIC

Calibration of magnetic field analyser

Meludin VELEDAR Electromagnetic fields and safety distances

Ni LI Analysis of Exposure Limits Standards of Power Frequency Electric and Magnetic Fields for General Public and Actual Situation

Antonios TZINEVRAKIS

Development of general analytical formulas for the magnetic field produced by double circuit power lines

Miroslav A. PRSA Determination of Frequency Dependent Radiuses of Steel Cored Aluminium Conductors

Zhao LU-XING Measurement and Analysis on Electromagnetic Environments of 1000 kV UHV AC Transmission Project in China

Aldo CANOVA Simplified power transformer models for environmental magnetic impact analysis

EMF-ELF-2011 : Session A

Characterisation & Measurement

• Optimisation techniques can be applied at different levels : the local level such as dealt with in session D or at a more global level like for instance in a whole substation

• In the same way, optimum conductor management can help reducing magnetic field in multicircuit cable system

• Simplified tools can help for making the first assessment or for teaching purposes

• When sharing common pathways with other infrastructures (i.e. railways, motorways), EMF, in particular in DC systems, are not only a possible health concern but can also be an EMC issue (corona, influence on telecom lines and pipelines)

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EPEE Panel 2010 EMF-ELF-2011- Session B – Biological effects

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EPEE Panel 2010

A few early epidemiological studies suggested an association between childhood leukemia and power-frequency MF above 0.4 μT. Recent studies suggest a somewhat weaker association.

Considering the sensitivity of the long term rodent bio-assays and their negative results even at fields levels exceeding 1000 μT, considering the lack of plausible biophysical mechanisms, the overall evidence supporting a carcinogenic potential of environmental MF exposure is very unlikely.

About 1 % of all French children live in an environment where MF levels exceed 0.4 μT.

The association between some neurodegenerative diseases and occupational EMF exposure is weak.

It becomes possible to monitor brain activity under exposures of up to 7 mT.

Although the European directive (2004/40/EC) asks for a medical surveillance, the nature and the modalities of this surveillance still needs to be defined.

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EMF-ELF-2011- Session B – Biological effects

EMF-ELF-2011: SESSION C

Occupational exposure (Cie exp.with regard to standards,guidelines , legislation)

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EMF-ELF-2011: SESSION C

Occupational exposure (Cie exp.with regard to standards,guidelines , legislation)

• Significant achievements have been made in the assessment of

the sensitivity thresholds of the human central nervous system

• Several surrogates of the high E field occupational exposure (floating potentials, contact current, short circuit body current, spark discharges…) have been analysed and proposed for compliance assessment

• Simple conservative modelling methods based on the concept of normalised induction factor (which quantifies the degree of non uniformity) can also be used for the M field (i.e. single cable modelling)

• Modelling possibilities and accuracy have also been increased on computational tools for substations

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EMF-ELF-2011 SESSION D – Mitigation Techniques

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Part 1

EMF-ELF-2011 SESSION D – Mitigation Techniques

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Part 2

EMF-ELF-2011 SESSION D – Mitigation Techniques

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Part 2

Poster Session

• What is new since Sarajevo Colloquium

• EMF topic has reached a mature stage in the current discussion

• Major Cigré Technical Brochures (e.g. TB 273 & 275) are well received and taken as solid and popular references

• A better understanding of the issues is achieved thanks to well prepared tutorials

• Progress of the methodology contribute to solve local and general controversies

• Development of dedicated tools or application of available software (analytical or finite element method) leads to better assessment of magnetic field levels

• New materials or manufacturing process are being developed

• Innovative solutions are emerging to improve mitigation solutions

• Life expectancy of mitigating devices has been assessed

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EMF-ELF-2011 SESSION D – Mitigation Techniques

EMF-ELF-2011 SESSION E – Communication – Risk management

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13.30-13.45 Paolo VECCHIA ITALY Chairman : introduction SESSION E

E-O-01 13.45-14.00 H. YOMORI JAPANEstablishment of Japan EMF Information Center (JEIC):

What should we do, what can we do?

Japan EMF Information Center, Japan Electrical

Safety &Environment Technology Laboratories

E-O-02 14.00-14.15 Vincent DU FOUR BELGIUM

How as a transmission system operator (TSO) to

respond to the growing public concern on the potential

health effects of ELF exposure? Internal actions and

scientific cooperation agreement with the BBEMG.

ELIA

E-O-03 14.15-14.30 A. G. SOERENSEN DENMARKImplementation of a precautionary approach - a case

study from DenmarkEnerginet

EMF-ELF-2011 SESSION E – Communication – Risk management

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E-O-04 15.00-15.15 Eberhard SCHUHLE GERMANY20 Year Experience about Dealing with EMF Public

Exposure Regional AG Stuttgart

E-O-05 15.15-15.30 Ni LI CHINA

Discussion on Health Effects of Electromagnetic Fields

for Power Network and Environmental Protection

Management Issue in China

State Grid Electric Power Research Institute

E-O-06 15.30-15.45 Thanh DOVAN AUSTRALIAElectric & magnetic fields of high voltage transmission

systems and compliance to Arpansa ELF draft standardSP AusNet - Australia

E-O-07 15.45-16.00José Antonio Simas

BULCAOBRAZIL

Contribution of the BRAZILIAN electric sector to the

development of the law 11.934 that establishes ICNIRP

levels of exposition to extremely low frequency electric

magnetic fields - ELF/EMF

ELETROBRÁS FURNAS

E-O-08 16.00-16.15 Mazana ARMSTRONG CANADA

Application of IEEE Electric Field Limits on Building

Developments abutting 500 kV Right-of-Ways – BC

Hydro’s Experience

BC HYDRO

E-O-09 16.15-16.30 David LANDIER FRANCE

How to use in an efficient way the existing mitigation

measures for EMF in the case of underground cables ?

Strategy adopted by RTE

RTE

EMF-ELF-2011 SESSION E – Communication – Risk management

• New communication strategies and tools emerge and meet the public’s

needs

• Risk management is not separate from risk communication. Actions may

convey more important and effective messages than words

• Dialogue with, rather than communication to, the public should be

established

• Strategies are more effective when pragmatic rather than ideological (i.e.

confrontation on risk/no risk). Explain what is being done to increase

protection and minimize exposure in spite of the lack of evidence of

adverse effect rather than insisting on scientific indication of “safety”

• Good will actions (mitigation of exposure independently of the evidence

of risk) help reducing controversies.

• A pragmatic approach may include different approaches to different

populations and/or social groups

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EMF-ELF-2013 THE FUTURE ?

• 2009 – June 3 & 4 : SARAJEVO

• 2011 – March 24 & 25 : PARIS

• 2013 – Date to be determined by SC C3 – CIGRE

Japanese National Committee has officially proposed to

organize the next colloquium – decision will be taken in

October 2011 during the SC C3 meeting in ISRAEL.

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