A measure of observability for multiconverter shipboard power systems

Abstract

Perturbations in shipboard power systems can make controllers useless if improper control strategies are used. Incorporating the nonlinear dynamics of the shipboard power system in the control methodology is the solution to this problem. Before this solution is designed, the concept of nonlinear observability should be first investigated. A measure of observability of such systems will allow one to quantify their operational performance. This paper attempts to account for an observability measure of these multiconverter systems through the inclusion of other dynamics such as electromechnical behavior of generators and loads, providing a more comprehensive view of system performance. In the example section the observability condition number will lead to an indicator of how far the system is from being unobservable based on the system load profile.