Advances in remedial action scheme modeling for power system analysis

The use of Remedial Action Scheme(s) (RAS) is an economic means to facilitate the interconnection of renewable generation while supporting the reliable operation of the transmission system. With the increasing prevalence of RAS on the system, automatic modeling is imperative in order to accurately capture the potential impacts and interaction between these schemes. Within the Western United States, the Western Electricity Coordinating Council (WECC) has been facilitating implementation of RAS modeling in power flow simulation via incorporation of these models into software packages. Beyond WECC´s effort, which largely centers on modeling for simulations in the steady state timeframe, is the need for automatic modeling of RAS in the dynamic timeframe. Through implementation of both an event-based and parameter- based RAS, analysis was performed to demonstrate the benefits such modeling can have on simulation accuracy and regional coordination.