Multiple-input dc-dc converters to enhance local availability in grids using distributed generation resources

This paper analyzes a multiple-input converter topology with boost and buck-boost input legs that serves to integrate several different distributed generation sources into a common system dc bus. The multiple-input converter is arranged in modules that hold the common parts and in sub-modules that contain each input leg component. The result is a flexible and easily scalable system suitable for renewable energy sources. When compared with traditional highly reliable systems, such as telecom rectifiers and standard microgrid architectures, the proposed converter is inherently more reliable. Power budget equations are derived and studied. The theoretical analysis is verified with simulations and experimental results.