Integration of grid connected PMG wind energy and solar energy systems using different control stratagies

Abstract

Wind energy and Solar energy, are considered to be the main attributes of renewable energy for electricity generation, are growing at faster rate for the last two-three decades. This paper pertains to the study of a novel integration of wind energy from grid connected Permanent Magnet Synchronous Generator (PMSG) and solar energy systems. In order to extract maximum power from Wind energy and solar energy systems a novel technique, known as Maximum Power Point Tracking (MPPT) technique, has been adopted, in this paper. Additionally, to maintain and sustain the continuity of supply to the load on demand at all times, the outputs of wind energy and solar energy are integrated suitably. For wind generator, the overall operation is based on the estimation of the speed, that is basically a sensor-less rotor speed estimator, which in fact avoids all mechanical sensors. The rotor speed so estimated, is used to control the turbine speed by maintaining the input dc quantities (Voltage and Current) for boost converter. Simulation studies of the proposed system are carried out using MATLAB / Simulink platform, and results are presented.

A Study on Hybrid DC Micro-Grid System

“…A microgrid is represented as a combination of different distributed energy resources and various loads. Stability issues arising in microgrid are very similar to those arising in large power system viz transient stability, voltage stability and small signal stability [2]. The common reasons of these stability issues are given in Fig.…”

“…The photovoltaic system connected to the grid is a more reliable solution to increase the demand for energy. The network connection of a photovoltaic power generation system has the advantage of more efficient use of the generated energy [2]. The PV systems are connected to the grid via the inverter, which converts the DC energy generated by the PV modules into alternating current.…”

“…The efficiency of fuel cell systems are ~ 50 %. Along with heat recovery systems the efficiency can be as high as ~ 80 % [2]. Description of the electrochemical process involved in the power generation process of a fuel cell is beyond the scope of this paper.…”

“…Several states in the USA invested millions to promote high penetration of microgrids as a part of their climate resiliency plans against natural disasters, especially after hurricane Sandy. Since microgrids typically include renewable sources and batteries, DC microgrids [2] will have the capability to increase the overall system efficiency.…”

Multi-Input Boost Converter for Parallel Connected Renewable Energy Systems

“…Therefore, the output transfer functions for HRES is derived as given in (11) and (12) for solar and wind generators respectively. Furthermore, the bode-plot is shown in Figs.…”