This book speaks about, 1. LCL Filter for 3-Ø Stable Inverter using Active Damping method 2. Optimization for stability is described using Genetic Algorithm 3.More emphasis is on novel active damping method that does not need the use of sensors and that can be tuned using Genetic Algorithms (GA) for optimized performance 4.Systematic exposition of basic principles invovled in operation,control and analysis of modern power three phase inverter systems. 5.Detailed coverage of power system stability in power systems. 6. Including on MATLAB and SIMULINK gives simulation pograms & P-sim programs. 7.Detailed coverage of filter using in power systems. 8.Detailed coverage of Power electronics permits generation of electric power from environmentally clean photovoltaic,fuel cells and wind energy sources. 9.It is a source for B E, M.E and research aspirants working in the fields of inverters, and converters using active damping technique.