COS - System Operation Center (Centro de Operação do Sistema)
The operation of the hydro energetic system of EMAE is performed under a supervised and coordinated fashionr, by the System Operation Center-COS, which works 24 hours uninterruptedly, everyday, enabling that information on the system status is constantly received, and thus, that adequate decisions are taken every time. In order to sponsor the operating decisions, the COS uses data received from pluviometric (rains) and fluviometric (water levels and flow rates) centers, information from the metereological radar, mathematical model for the forecast of the flows and data from other companies of the Brazilian

Interconnected Electric System - Sistema Elétrico Interligado Brasileiro. The procedures to be used in the operation maneuvers, both hydraulic and electric and energetic, are commented on the instructions for specific operations, for each case.