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SCHEDULING

Perform a full optimization of all resources within a market or utility control center enforcing transmission limits and a complete set of operating costs and real world constraints.

By utilizing Mixed Integer Programming, the software determines the best combination of resources to commit and the appropriate dispatch and storage levels for each interval of the operating day. In addition to minimum uptime and downtime requirements, EnCompass can also cap the number of starts and shutdowns, and recognize costs and fuel requirements for hot, warm, and cold starts and shutdowns.

DETAILED DISPATCH

EnCompass users can set heat rates and dispatch costs for any number of blocks and define any number of fuels. EnCompass will utilize the least-cost fuel, subject to minimum and maximum limits and blending restrictions. Dependency constraints and waste heat recovery allow combined cycle resources to be modeled as complete configurations or as individual components. Alternative operating modes are used to define different conditions for co-firing multiple fuels or operating emission reduction equipment. Analysts may assign resources to multiple environmental programs, which may include mass-based emission allowances, rate-based emission rate credits, or renewable energy credits.

ANCILLARY SERVICES

Regional ancillary service requirements are co-optimized along with area load to ensure enough resources are available for uncertain events. Ancillary services include supplemental reserves (both up and down), contingency reserves (with a spinning and non-spinning component), and regulation reserves (both up and down). Reserve regions may overlap so that subareas must maintain a minimum level of reserves in addition to market-wide requirements, or they may span multiple balancing authorities to provide reserve sharing.

STORAGE AND RENEWABLES

EnCompass will also co-optimize limited energy resources such as hydro, storage, and demand response with load shifting or “bounce back.” Storage may be paired with renewable projects to only charge when they generate or can charge using any resource connected to the grid. Analysts may also utilize cycle depth penalties to reduce excessive cycling and extend the life of batteries. Analysts can model intermittent renewable resources such as wind and solar with daily profile shapes down to the 1-minute level. Excess generation that cannot be stored or sold will be curtailed, with the ability to set the priority of resources for curtailment and if costs should still be applied.

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