Commitment cost enhancements phase 3

Effective April 1, 2019, the ISO activated system changes to calculate use-limited resource opportunity costs and create opportunity cost adders for bidding into the ISO market using the proxy cost option. Effective May 1, 2019, the calculated Opportunity Cost Adders are available for use in the ISO markets. This implementation improves the management of use limited resources by allowing translation of most cases into standard limitations, therefore reducing the amount of cases requiring negotiation of opportunity costs.