The indicators system for the short circuit currents levels assessment in the power systems

摘要

Currently there is a problem of insufficient information content and clarity of the data obtained as a result of short-circuit currents calculation in a power system that negatively affects efficiency of decision-making at power systems operation and development planning. This paper offers the methodology assuming the choice of substations-indicators of short-circuit currents levels on the basis of evaluation system for amount of change of the current and perspective levels of short-circuit currents. This approach has been applied to an assessment of short-circuit currents levels in a regional power system. On the basis of the obtained data technical requirements on the switching devices breaking capacity in the existing substations of considered energy area have been formulated.