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Steady State Network Analysis

Introduction

Brazil is the only developing country to have its own chain of computational models focused on the simulation of electrical networks, developed as the Brazilian electrical system evolved. As soon as the possibility of incorporating a new type of equipment into the Brazilian Interconnected Power System appears, efforts are made to adequately model it in the programs. In this context, the research area "Steady State Network Analysis" is dedicated to the creation of computational programs that allow to evaluate the behavior of the power system considering a static modeling of the electric network, that is, assuming that the variations of the quantities over time are sufficiently slow to disregard transient effects.

 

Steady state network analysis programs allow engineers to carry out a wide range of studies, including power flow, contingency analysis, transient stability analysis, voltage and line flow sensitivity analysis and continuation power flow. There are also modules specifically designed for evaluation of power system restoration corridors and voltage security assessment.  Network analysis programs developed by this area are permanently updated and kept compatible with each other.

Another research topic of this area is the need to optimize an operating point, taking into account an objective function, a set of physical and operational constraints and a set of control variables. Constraints and control variables may include the whole power system or selected parts of it.The optimization software developed uses state of the art nonlinear optimization techniques applied to power systems, namely interior point methods. Methods that allow the optimization of the operating point of a power system taking into account a set of likely contingencies are also available, the so called security constrained optimal power flow.   The computer programs developed by this research area are ANAREDE (power flow) and FLUPOT (optimal power flow). These programs are essential tools, used for different types of studies and off-line network analysis. They are widely used by ONS-Operador Nacional do Sistema Elétrico, EPE-Empresa de Pesquisa Energética, the Ministry of Mines and Energy, generation, transmission and distribution utilities and Eletrobras enterprises.

  The research area counts on the participation of Eletrobras enterprises, industry organizations as ONS, the Ministry of Mines and Energy. Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia da Universidade Federal do Rio de Janeiro (COPPE/UFRJ), Pontifícia Universidade Católica do Rio de Janeiro (PUC-RJ) and Universidade Federal de Juiz de Fora (UFJF) also participate on the development efforts conducted by this research area.   The “Steady State Network Analysis” research area is related with the following research areas: “Harmonics Analysis and Short Circuit Calculation”, “Dynamic Network Analysis”, ”Computational Techniques Applied to Power Systems” and “Real Time Network Simulation”.

See below further information on the software programs developed under this line of research.
 

Contact

Contact the responsible area via email:


 dre@cepel.br

Software