Performance limitations of random current-sharing parallel-connected converter systems & their solution

A study of a random current-sharing converter system is presented. The system is comprised of many converters connected in parallel, Each converter has its own single control loop operating in either voltage regulation or current-limiting mode, Performance Limitations are discovered through system simulation. Non-uniform current-sharing occurs despite voltage droop characteristics that facilitate near-uniform current-distribution, Due to random mismatches in component values, uneven current-sharing among parallel-connected converters exists, This causes system performance characteristics to exhibit large variations and system current-sharing is found to be far from uniform, resulting in poor system reliability. achieve near-uniform current system output voltage, and reduction of the output impedance variances is also discussed, A resolution to achieve near-uniform current distribution, stiff system output voltage, and reduction of the output voltage, and reduction of the output impedance variances is also discussed.