System and method for unified common mode voltage injection

摘要

A power conversion system includes at least one multi-level power converter and a controller coupled to the at least one multi-level power converter. The controller includes a first CMV injection module (402) and a second CMV injection module (404). The first CMV injection module (402) generates a first CMV signal (406) for modifying at least one voltage command (422) to achieve a first function in association with operation of the power conversion system. The second CMV injection module (404) generates a second CMV signal (408) based at least in part on a local limit either for modifying the at least one voltage command (422) or for further modifying the at least one modified voltage command (424) to achieve a second function in association with operation of the power conversion system.