PLEXOS 6.200 Release Notes
- Upgrade Compatibility
- Changes
- Features
- New Inputs
- Moved Inputs
- Input Changes
- New Outputs
- Changed Outputs
- Released
- May 20, 2010
- Updated
- -
- Previous Version
- 6.104
- Next Version
- 6.201
This is an important update in that changes have been made to the input and solution database schema. The upgrades automatically moves your input databases to the new schema but once updated the files cannot be converted back to the previous version.
The input database schema has been revised to improve performance. If you have in the past built your own solution to produce PLEXOS-format input databases bespoke you may need to make changes to support the revised schema. If your custom solutions use the PLEXOS COM library then these should continue to work in the new version with only minor modifications. Similarly the solution database schema has had some small revision. In particular the t_key table now contains a phase_id field indicating the simulation phase that applies to the property_id. In previous versions the property_id was unique but in the 200 series the same property_id can be output by multiple simulation phases. The phase_id can take these values:
| Simulation phase | Value |
|---|---|
| LT Plan | 1 |
| PASA | 2 |
| MT Schedule | 3 |
| ST Schedule | 4 |
PLEXOS 6.200 can open and query solution databases from older PLEXOS 5/6 versions.
2. Changes
N/A
3. Features
3.1.1 Gurobi
The simulator now fully supports the Gurobi optimizer (www.gurobi.com). Gurobi is a new optimization library developed by Messrs Gu, Rothchild, and Bixby, formally of CPLEX. Gurobi is integrated the same way as other optimizers. Testing shows it is a particularly good mixed-integer solver. Feel free to request a trial licence for the Gurobi optimizer.
3.2. Expanded LT Plan Reporting
LT Plan can now report the same production cost solution fields at MT and ST Schedule. The outputs of these three simulation phases have be synchronised and standardised. For example the complete set of Generator Fuels and Reserve Generators output fields are now available in LT Plan.
3.3. Select Samples and Statistics by Property
When running multi-sample simulations (either Monte Carlo or Stochastic Optimization) it is useful to be able to output either or both the individual sample results or summary statistics (std. dev., min., mean, and max.). However in previous versions selecting output of samples and/or statistics caused those data to be written for all selected outputs. This was inconvenient in that it resulted in very large solution files and the output of many multi-sample results that were not of interest to the analyst. For example when performing a price forecasting simulation, the useful multi-sample outputs might be price, generation and net profit, whereas it might be sufficient to output only the average of other fields. Selective reporting of samples and statistics is now possible.
4. New Inputs
See above.
5. Moved Inputs
N/A
6. Input Changes
N/A
7. New Outputs
N/A
8. Changed Outputs
N/A