ANALYSIS TOOLS FOR POWER-SYSTEMS - CONTENDING WITH NONLINEARITIES

As systems become more heavily loaded, nonlinearities play an increasi ngly important role in power system behavior. Modeling must accurately reflect component and system response. Analysis tools should continue to work reliably, even under extreme system conditions, providing acc urate predictions of system behavior. The paper considers some power s ystem modeling issues and presents an overview of the source of nonlin earities in power systems. It then considers industry accepted analysi s techniques, as well as those techniques that are more research orien tated. The in influence of nonlinearities on these tools is explored.