621.311 : 681.3

.. , . . , . . . (- , )

ί ҲҲ Ͳ Ͳ ʲ ֲ

, . , - .

, . , - .

This paper presents some fragments of history concerning progress of the researches in the field of power systems static stability problem, which were conducted at the Institute of electrodynamics of NASU. One approach to estimation of safety level of power system operational conditions is proposed. The approach proposed foresees creation of problem-oriented monitoring system dealing with Ukrainian Power System operational conditions.