PSR English

OptGen

Is a computational tool for determining the least-cost expansion (generation and interconnections) of a multi-regional hydrothermal system. It represents details of the system operation taking into account inflow uncertainties, emission constraints, and minimum capacity constraints, among other features. It is used both by planners in environments with centralized and state-owned companies and by regulators and investors in modeling competitive environments.
It is used both by planners in environments with centralized and state-owned companies and by regulators and investors in modeling competitive environments.

Modeling Aspects:

The integrated expansion is formulated as a large scale mixed integer programming problem with the following features:

seta Flexibility of investment & operation steps (year, semester, quarter, month);

seta Investment decisions represented either by integer or continuous variables;

seta Optional and obligatory projects;

seta Sets of associated projects;

seta Sets of mutually exclusive projects;

seta Precedence constraints;

seta Minimum capacity constraints for different groups of technology and for different time intervals allowing to represent governmental energy policies;

seta Reference marginal cost calculation;

seta Environmental constraints: emission of greenhouse gases;

seta Fuel availability constraints;

seta Multiple scenario analysis;

seta Analysis of a complete or partial expansion plan defined by the user.

The solution is obtained using advanced MIP techniques and Benders decomposition.

System Characteristics

seta Full graphic interface in Windows operational system;

seta Integrated graph visualizer model;

seta Input and output files are CSV files that can be handled by Excel;

seta Data can be imported from either Super Olade Expansion Model - MODPIN or from SDDP, both developed by PSR;

seta Outputs include the optimal expansion plan (reinforcement schedule, installed capacity per stage, investment costs, disbursement schedule etc.) and detailed operating results.

Integration with SDDP

OPTGEN also has a built-in feature for joint use with SDDP, which is a detailed transmission constrained stochastic hydrothermal scheduling model developed by PSR.

Some Recent Applications

seta SEETEC Project for studying the infrastructure Development Plan & Regional Electricity Market Benefits in the Balkans Region 2003-2010. (eight interconnected countries, 30 GW of current energy demand and 5 GW of incremental demand forecast by 2010);

seta Venezuelan Generation and Transmission Expansion Plan 2002-2010 (20 GW of installed capacity - 65% hydro - and 10 interconnected regions);

seta Brazil Expansion Planning Study 2004-2015 ( 85 GW of installed capacity - 85% hydro, 27.5 GW of incremental demand forecast by 2015, 117 hydro plants, 108 thermal plants and 9 interconnected regions).

Tela 1.2.1