This paper presents a computational system to support real time Volt/Var control actions in an EMS or DMS environment. The system can be used in on-line mode (monitoration, simulation and optimization) with information from SCADA, parameter database and state estimator, and off-line mode (training and past simulation and optimization), which information (operational point and topology network) are obtained from a historic on-line database. It runs automatically in the monitoration mode and on demand in simulation and optimization mode. This system is running in a regional utility in Brazil (RGE utility) since 2002. The final tests are being done to validate the final application.Index Terms -coordinated voltage control, secondary voltage control, automatic control, training and simulation actions.
I. INTRODUCTIONver the last years, power systems planning and operation conditions have been increasing in size, complexity, technology and regulatory issues. Nowadays, operation of power system with reliability, performance indexes, energy conservation, security (static and dynamic) and power quality together with a desire for optimized operation conditions in normal and emergency conditions is the main objective of the electrical utilities. In addition, problems related with subtransmission and distribution systems have not been given much concern if compared with transmission systems. Considering this facts, control actions and operation rules are become more complex, what is demanding additional efforts of power system engineer. These are some aspects that has brought important conditions and challenges for using of computational systems that keep the system at security and economical operation condition. Thus, coordinated on-line * This work was supported by the R&D Resources of Distribution Utility RGE-Rio Grande Energia S.A. and by CNPq for partial support of some stages of the project.
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