The increase in utility scale wind development across North America has and continues to change the energy supply mix in many jurisdictions. Driven primarily by state-level renewable portfolio standard (RPS) requirements and clean air regulation, state and provincial supply mixes once dominated by coal, hydro nuclear and natural gas are now becoming more diverse. Intermittent generation sources – once a small component of total capacity – are becoming substantial. And, as a result, system operators have had to periodically curtail these intermittent generators in order to maintain system balance and reliability.