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This paper shows modelling, studies and analyses of an electrical submersible pump system (ESP) and considers several characteristics of key elements in this system, highlighting system's start-up and also proposing solutions to mitigate some problems by projecting and designing passive power filters. In the study cases, it was considered a medium voltage power system with a 3835HP three phase squirrel cage induction motor which is connected with a centrifugal pump that results in a high inertia coefficient. Rotational friction model is considered in the studies to characterize the peculiarities that occur at the initial seconds of the system's start-up and also to evaluate the performance of the implemented control strategy. In the same way that occurs in real systems, it is considered an open-loop V/Hz control and accomplished a method to estimate and compensate voltage drop that exists between the terminals of the converter and motor input. [ABSTRACT FROM AUTHOR]

This work proposes an integrated computational tool to support the designer engineer during the elaboration of projects of industrial distribution networks during the conceptual and basic design, presenting the methodology for a technical and economic analysis of electrical systems applied to oil refineries. [ABSTRACT FROM PUBLISHER]

This work presents a new formulation for the power flow problem, with explicit representation of the neutral conductor and grounding. This methodology has been named the four-conductor current injection method (FCIM). The Newton-Raphson method is applied to solve the set of nonlinear current injection equations that are derived using phase coordinates, and the complex variables are written in rectangular form. The proposed algorithm can be used to analyze both balanced and unbalanced systems, meshed or radial, with controls and distributed generation, and is shown to be very efficient and robust for large scale systems. [ABSTRACT FROM AUTHOR]