A Model Concerning the High Voltage Systems Impact on the Environment inside a Romanian Power Substation P. EHEGARDNER 1 , A. S.JUDE 2 , P. ANDEA 3 , D. VATAU 4 , F.M. FRIGURA-ILIASA 5 Power Systems Department POLITEHNICA University of Timisoara, Faculty of Power and Electrical Engineering 2 V. Parvan Bvd., TIMISOARA 300223, ROMANIA e-mail: flaviu.frigura@et.upt.ro , http://www.et.upt.ro Abstract: - The paper presents a system designed for monitoring the impact of 220 kV and 400 kV high voltage installations over the environment. The electromagnetic pollution produced by high voltage power plants is analyzed. The experimental results correspond to a case study represented by the Iernut substation. The electric and magnetic field using the developed monitoring system is measured. The component elements of the monitoring system and its advantages are also presented in the paper. Key-Words: - High Voltage Systems, Environment, Romanian Power Station, 1 Introduction Increased power consumption is a sustainable trend, shown from the beginning of using this form of energy, not having any sign of change it. Contrary, it is expected that the electricity should gradually occupy a larger share, among different forms of energy suitable for all population and economic activities. Simultaneously together with the development of sources of electricity and the increased need for transmission and distribution facilities, growth that will continue as long as the traditional power systems scheme will be best solution both technically and also economically. Raising the capacity of transmission facilities requests the increase of electrical overhead lines voltage, as well as the number of the lines. Of these two issues arising with environmental influences related to the installation and operation of transmission and distribution of electricity. The main issues considered are: visual pollution, noise pollution due to the corona phenomenon, electro- magnetic pollution due to electromagnetic field of low frequency (and induced biological effects), due to electromagnetic field pollution electromagnetic high frequency (disturbance broadcasts of radio and TV), psychological pollution, Ecological pollution (land occupation, the production of ozone etc.). Some of these issues have a quantifiable method of computing and measurement, others, such as visual, psychological or biological, can not be sufficiently assessed correctly. For more than 30 years there are concerns that the determination by calculating and measuring the electric field intensity and the magnetic field generated by high voltage equipment as well as the consequences of the electromagnetic fields they have on the health and protection of persons. Group may be biological effects in two categories: • Effects immediate or short-term, which are undeniable . Worldwide there is a consensus, which is materialized by defining the permissible limits on exposure of individuals; • Long-term effects (cancer, reproductive) which is subject to controversy Among the most important (but not only) inter- national bodies dealing with regulations on permis- sible limits for electric and magnetic fields are:  International Commission for protection against radiation non-ionizing - ICNIRP;  The European normalization in electro - CENELEC;  Directorate General V of the European Commission. The first two institutions are the difference between the population and workers in high-voltage equipment, while the third refers only to workers. All these bodies have been proposed rules on permissible limits of intensity electric and magnetic heads for different frequencies. Can not but speak of a consensus on an international level. This paper presents a system for monitoring the impact of the high voltage of 220 kV and 400 kV installations over the environment. 2. Considerations on the Electromagnetic Pollution Produced by High Voltage Power Plants Electromagnetic Field generated by the power plants produces on the human beings and plants around, a series of effects, to which it is necessary to take special protection measures. The intensity of electric field and so its side effects increase with the increasing of installations nominal voltage. That is Proceedings of the 11th WSEAS International Conference on Automatic Control, Modelling and Simulation ISSN: 1790-5117 419 ISBN: 978-960-474-082-6