Dynamic modeling and stability analysis of grid-connected and autonomous distributed generation system

Abstract

This paper presents a model of a distributed generation system that could operate both autonomously and connected with the grid. Mathematical models of the distributed energy resources were used to study the dynamic behavior of the interconnected system that includes a three-level control system. State-space models for entire grid-connected system were developed and the small-signal stability of the system was studied. All models were built using MATLAB/Simulink and numerical simulations were used to verify and validate the models as well as the operation of the controlled system. Index Terms-distributed generation (DG), state-space model, small-signal stability, photovoltaic cell, MATLAB/Simulink

Solar Irradiance Estimation Using Kalman Filter

“…Accurate information about these variables is essential to know the potential of solar energy generation in a given location (Martins and Pereira 2011;Pereira et al 2017). Such information can also reveal the best way used to manage real-time generation systems through applications such as Maximum Power Point Tracking (MPPT) (Chikh and Chandra 2015;Scolari et al 2017) and control hybrid power generation systems (Ding et al 2015 Mohammed 2013). However, in addition to being associated with the Earth's translation and rotation movements, the solar resource depends directly on local meteorological factors and is thus highly variable (Pereira et al 2017).…”