Design and implementation of dc-bus system module for parallel integrated sustainable energy conversion systems

In this paper, a performance analysis of a highly integrated, high-performance dc-bus system module is presented. This module introduces a solution for medium & low voltage DC distribution applications. It is designed for applications requiring a single bus solution to control up to twelve DC-sources sharing same dc-bus and having same dc-voltage level. The bus is also designed to interface with various power converter modules. Moreover, it has ability for parallel integrated renewable sources connection representing DC-microgrid. A master-slave dc-bus voltage control technique for parallel wind-based synchronous generators is introduced. This technique is developed based on the voltage oriented control (VOC) algorithm for PWM converters. Test results for different disturbance conditions are carried out to validate this developed module. The proposed system is also implemented in a laboratory setup which includes two synchronous generators (250 W, 2.2 kW) each driven by a variable speed prime mover (VSPM) to emulate a wind turbine behavior, two 3-phase PWM based converters, 3-phase line inductors connected between wind generators and converters, variable resistive DC-load, and a digital signal processor (DSP TMS320F240). The experimental results confirm the validity of the developed module for parallel integrated sustainable energy conversion systems.