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Helsinki, Finland

Fingrid Oyj is a Finnish national electricity transmission grid operator. It is owned by the Finnish state and various financial and insurance institutions . In 2011, power companies Fortum Power and Heat Oy and Pohjolan Voima sold their stakes in Fingrid , because of EU Internal Market Directive in Electricity, which requires that power production and ownership of the transmission systems should be separate. CEO of the company is Jukka Ruusunen. Wikipedia.


Siirto O.,A+ Network | Hakala S.,Fingrid Oyj | Hyvarinen M.,A+ Network | Heine P.,A+ Network | Lehtonen M.,Aalto University
International Review of Electrical Engineering | Year: 2013

Distribution automation (DA) is one of the key elements in mitigating the inconvenience caused by network faults in city distribution networks. DA is targeted at shortening the interruption time once the fault has occurred. In this paper, the planning approach relies on the comparison between the customer interruption costs (CIC) and coverage of DA in urban networks. Also the effects of substation outages to the benefit of distribution automation are evaluated. The major outcome of the study is the creation of flexible and accurate optimization of distribution automation in urban networks. The method is especially suitable and usable for those utilities, which has both network and customer data in the Geographical Information System (GIS) or Network Information System (NIS). © 2013 Praise Worthy Prize S.r.l.-All rights reserved. Source


Korpinen L.,Tampere University of Technology | Kuisti H.,Fingrid Oyj | Elovaara J.,Fingrid Oyj
Bioelectromagnetics | Year: 2016

The aim of the study was to analyze all values of electric currents from measured periods while performing tasks in forest clearing. The objective was also to choose and analyze measurement cases, where current measurements successfully lasted the entire work period (about 30min). Two forestry workers volunteered to perform four forest clearing tasks under 400kV power lines. The sampling frequency of the current measurements was 1sample/s. The maximum values of the current densities were 1.0-1.2mA/m2 (calculated internal EFs 5.0-12.0mV/m), and the average values were 0.2-0.4mA/m2. The highest contact current was 167.4μA. All measured values during forest clearing tasks were lower than basic restrictions (0.1V/m and 0.8V/m) of the International Commission on Non-Ionizing Radiation Protection. Bioelectromagnetics. © 2016 The Authors. Bioelectromagnetics published by Wiley Periodicals, Inc. Source


Korpinen L.,Tampere University of Technology | Kuisti H.,Fingrid Oyj | Paakkonen R.,Finnish Institute of Occupational Health | Vanhala P.,Helsingin Energia | Elovaara J.,Fingrid Oyj
Annals of Occupational Hygiene | Year: 2011

The aim of the study was to measure occupational exposure to electric and magnetic fields during various work tasks at switching and transforming stations of 110 kV (in some situations 20 kV), and analyze if the action values of European Union Directive 2004/40/EC or reference values of International Commission on Non-ionizing Radiation Protection (ICNIRP) were exceeded. The electric (n = 765) and magnetic (n = 203) fields were measured during various work tasks. The average values of all measurements were 3.6 kV m -1 and 28.6 μT. The maximum value of electric fields was 15.5 kV m -1 at task 'maintenance of operating device of circuit breaker from service platform'. In one special work task close to shunt reactor cables (20 kV), the highest magnetic field was 710 μT. In general, the measured magnetic fields were below the reference values of ICNIRP. © 2011 The Author. Source


Korpinen L.,Tampere University of Technology | Kuisti H.,Fingrid Oyj | Elovaara J.,Fingrid Oyj | Virtanen V.,University of Tampere
PACE - Pacing and Clinical Electrophysiology | Year: 2014

Background Implantable cardioverter defibrillator (ICD) therapy has increased in Western countries. The aim of the study was to investigate the function of ICDs using a human-shaped phantom in electric and magnetic fields of 400 kV power lines. Methods The phantom was used in the following manner: isolated from the ground, earthed from a foot, or earthed from a hand. Results We performed 37 ICD tests using 10 different ICD devices. When the electric fields varied from 6.8 kV/m to 7.5 kV/m (humidity 70.5%) and the magnetic field was 2.0 μT, one of the ICDs tested recorded 258 ventricular beats/min when a simulated heart signal was applied to ICD electrodes. When the exposure was 5.1 kV/m, the same ICD had a similar disturbance; however, in a 0.9 kV/m field, it worked correctly. Conclusions Consequently, no effect on ICDs functioning was observed up to 0.9 kV/m, while anomalous behavior in some conditions was observed when levels exceeded 5.1 kV/m; ICD malfunctioning seems possible within 11.5 m from 400 kV power lines or in conditions inducing exposures exceeding 5 kV/m. Further development of this research field is needed. ©2013, The Authors. Journal compilation ©2013 Wiley Periodicals, Inc. Source


Korpinen L.,Tampere University of Technology | Kuisti H.,Fingrid Oyj | Elovaara J.,Fingrid Oyj | Virtanen V.,University of Tampere
PACE - Pacing and Clinical Electrophysiology | Year: 2012

Background: The cardiac pacemaker (PM) implantation rate per million is high. Earlier studies have found interference to PMs by electromagnetic fields. The aim of the study is to investigate disturbances in cardiac PM using a human-shaped phantom in electric and magnetic fields of 400-kV power lines. Methods: The phantom was used in the following manner: isolated from the ground, grounded from left or right foot, or grounded from left or right hand. Results: Out of the tested PMs one had such a disturbance that it set the pace 60 times per minute, when the electric field was 6.7-7.5 kV/m and the magnetic field was 2.4-2.9 μT. The electrode configuration of the PM was unipolar. In bipolar configuration, the same PM had no disturbance. During the test period, other PMs only had minor disturbances or none at all. Some PMs do not record time information for minor disturbances. In such cases, it was impossible to link the disturbances to the exposure under the power line. Conclusions: The electric field under a 400-kV power line may disturb a PM. However, only one type out of several tested PMs showed a major disturbance and that was only with a unipolar electrode configuration. The risk of disturbances is therefore not deemed to be high. ©2012, The Authors. Journal compilation ©2012 Wiley Periodicals, Inc. Source

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