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Cascading outages have resulted in significant disruptions to power systems all over the world. Controlled islanding can provide a corrective measure of last resort to alleviate the impact of large disturbances. This paper provides detailed demonstrations of using controlled islanding to prevent cascading outages in bulk power systems. To test the islanding performance, four extreme contingencies...
This paper provides an update on a composite load model development in Western Electricity Coordinating Council (WECC). A composite load model structure is described. The two salient features of the new load model are: (a) the model recognizes electrical distance between the transmission bus and the end-uses and (b) the model represents the diversity in composition and dynamic characteristics of various...
Unintended loss of a major power plant can cause substantial strain on the remaining generating resources and lead to local system instability and/or generate oscillations with impact to the overall bulk power system. In the continuing quest to improve the availability of the generation supply and in order to meet the more stringent electric coordinating council reliability criteria, power companies...
Unintended loss of a major power plant can cause substantial strain on the remaining generating resources and lead to local system instability and/or generate oscillations with impact to the overall bulk power system. In the continuing quest to improve the availability of the generation supply and in order to meet the more stringent electric coordinating council reliability criteria, power companies...
Despite the lessons learned over years of load research, the power industry for the most part continues to use very simple functional models to represent loads in power system dynamic simulations. Even with some refinements such as the addition of induction motors, it has been demonstrated that in some cases these models are inadequate to properly characterize phenomena that are critical to power...
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