DESIGN OF ISLANDED DC MICROGRIDS FOR SYSTEM STABILITY ANALYSIS BY USING DROOP CONTROL TECHNIQUE

electrical engineering

This paper presents an islanded operation mode, droop control as basic method for bus voltage stabilization when there is no communication among the sources. In this work it is shown the consequences of droop implementation on the voltage stability of dc power systems with the DC-DC Boost converter for different loads, whose loads are active and nonlinear, e.g. constant power loads (CPLs). The set of parallel sources and their corresponding transmission lines are modeled by an ideal voltage source in series with an equivalent resistance and inductance. This approximate model allows performing a nonlinear stability analysis to predict the system qualitative behavior due to the reduced number of differential equations. Additionally, nonlinear analysis provides analytical stability conditions as a function of the model parameters and it leads to a design guideline to build reliable MGs based on safe operating regions. This paper compares the conventional two parallel DC-DC boost converters can be compared with the Proposed Three parallel DC-DC boost converters with the linear and non linear loads. MATLAB/SIMULINK software has used for simulation analysis of the proposed system.

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