METHODOLOGY FOR ANALYSIS OF ANGLE STABILITY IN DISTRIBUTION SYSTEM WITH DISTRIBUTED GENERATION

Brazil is going through a moment of change in the power generation paradigm. Renewable sources are expanding their market share and the connection in distribution networks is inevitable. Customers will exchange energy freely with the power utilities, inconsistently and without predictability. The distribution systems, so far supplying radial feeders, with linear electric loads, with low shortcircuit power and predominance of unidirectional power flow. This condition was drastically changed to a topology with multiple generations, distributed and with uncertain operation. This paper investigates the angular stability of distribution systems, with multiple synchronous and asynchronous generating machines, with penetration level increasing of distributed generation such as wind and photovoltaic. A methodology to develop a reduced equivalent dynamic model, as well as a stability analysis of distribution systems is proposed considering varied operative conditions and the characteristics of the traditional distribution systems.