Preotescu - Institute of Power studies and Design Bucharest - ROMANIA
Albert - Institute of Power studies and Design Bucharest - ROMANIA
Voicu - Institute of Power studies and Design Bucharest - ROMANIA

The paper presents botb. an and assessm.ent method, fully computerized, concerning the standard of one power network safety in- operation assumed as a whole unit during the interconnected operation. For the accuracy of the safety in operation approach, it has been considered a hierarchical classification of (lie installation, as follows: 1. The unitary energy system network 2. The zonal network 3.connecting network of the customer to N.E.S. Finally the programs utilized and their characteristics are showed.