It has been very clearly asserted that the electric and magnetic fields produced by the electric network may cause physiological effects due to the currents induced into the human tissues exceeding certain levels, but the magnetic fields with inductions lower than 1.2 µT may also produce biological impacts, decreasing the immune capacity, as resulting from the laboratory analyses correlated with epidemiological studies. This paper presents a new approach to the biological effect of the 50/60 Hz electromagnetic field on humans therefore using the concept of bio-energetic fields. Prof. Ancu Dinca's discovery consists in the drastically reduction of the effects of the electromagnetic field on the people placed in their neighborhood by placing passive auto-converters close to the electromagnetic field generators. Reduced effects can also be obtained by applying some personal devices to regenerate the energy-informational field of the person within zones characterized by relatively high values of the magnetic induction. The measurements made in different locations with high values of magnetic field inductions, i.e. close to post transformers or inside the extra high voltage substations, have shown the advantages of both protection devices used.
The paper describes typical developments of blackouts from simple cause to cascading outages. Possible measures to increase the system observability, combined with power electronic equipments as controlling elements, can lead to a future closed loop control of the power supply. The possible increase of the overall network security by protection security assessment (PSA) and dynamic network security assessment (DSA) will be shown. The described network and protection simulations, which are available today for the transmission sector, have to be adopted to future distribution systems with dispersed generation.
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