EnCompass Power Planning Software is capable of performing a full optimization of all resources within a market or utility control center, subject to transmission limits and a complete set of operating costs and 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.
Heat rates and dispatch costs are set for the minimum (no-load) operating level, as well as any number of blocks up to maximum capacity. Any number of fuels may be defined for a resource, and EnCompass will utilize the least-cost fuel, subject to minimum and maximum limits. Dependency constrains and waste heat recovery allow combined cycle resources to be modeled as complete configurations or as individual components. Resources may be assigned to multiple environmental programs, which may include mass-based emission allowances, rate-based emission rate credits, or renewable energy credits.
Regional ancillary service requirements are co-optimized along with area load to ensure enough resources are available for uncertain events. Contingency reserves may be set with both a spinning (responsive) and a non-spinning (supplemental) component. Regulation reserves are defined with up and down requirements, and resources that provide regulation may be restricted to be dispatched within a given capacity range. 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 & Renewables
EnCompass will also co-optimize limited energy resources such as hydro, storage, and demand response with load shifting or “bounce back.” Intermittent renewable resources such as wind and solar may be modeled with daily profile shapes down to the 1-minute level.
Combined with the ramp rate restrictions on dispatchable resources, EnCompass provides all of the necessary features to quantify the impacts of renewable and storage integration at the sub-hourly level.
The detailed modeling in EnCompass is relied on for budgeting and rate case test year results.