Testes reais de recomposição em usinas hidrelétricas

Abstract

Procedures related to Real Tests for Power System Restoration, regarding power plant conditions, are the main subject of this work. After a strong domestic electrical disturbance of large proportion occurred in 2009 [ONS, 2009], in the Brazilian National Interconnected System (SIN), the Independent System Operator (ONS) began to exercise greater oversight of such tests carried out by the agents responsible for rebuilding system generation. The operational routine for real test procedures, identified as RO-RR.BR.01, is generally prepared for all plants in the SIN that perform some kind of test recovery. So these plants, although in most cases very different, must meet the same requirements. The difficulties to achieve the real tests of restoration do not consist in restoring a real disorder, but in the simulation of the conditions of disturbance while maintaining the network and other equipment in normal operation. In SIN, must undergo some kind of real test of recovery about 75 hydroelectric plants, of which 10 are owned by CEMIG (Brazilian Power Company of Minas Gerais State). This work discusses the main aspects related to tests procedures and presents the strategies adopted to validate the full availability of CEMIG plants to participate effectively in a real disruption in fluent and coordinated phases of the restorative system control.