CHANGES IN BUILD 20241107:

• Now minimum number of diesel generators in parallel can be 0.
• Total tax for electricity sold now is used to reduce electricity incomes due to selling electricity to the grid (before it was considered to increase incomes). Projects created with previous versions, when opened, will have the sign of this data changed, so that the results are not modified.
• In the report, added percentage of total load energy self-consumed.
• LCOE now has 4 decimal positions.
• Added LCOH and LCOS results in the Excel file of the costs.
• In NPC optimization systems, added calculations of annual savings and IRR of the savings (comparing our system with the system to supply all the load only with AC grid) in the Excel file of the costs.
• In NPV optimization systems, added calculations of IRR in the Excel file of the costs.
• In NPC optimization systems, added the possibility to optimize by maximizing the IRR of the savings (comparing our system with the system to supply all the load only with AC grid).
• Added the possibility of considering the loan in payback calcualtions (before it was not considered).
• Added the possibility of considering the loan in IRR calcualtions (before it was not considered).
• Improved calculation of the pump efficiency (if variable pump efficiency)
• Fixed bug when in particular cases when using variable losses in hydraulic pipelines using Haaland equation for Colebrook approximation.
• Fixed bug when considering minimum time of running the backup generator.
• Fixed bugs in the calculation of payback period in the case of multiperiod.
• Fixed bug when calculating E back-up charge (self-consumed energy) in grid-connected sytems with batteries.
• Fixed minor bugs.

CHANGES IN BUILD 20241003:

• Fixed bug when calculating Export (excess) energy in some cases when charging batteries due to the grid limitation.
• Added losses in wire and transformer in Energy purchased to the grid (if the user selects this option).
• Subtracted losses in wire and transformer in Export energy and in Bach-up charge energy (if the user selects these options).

CHANGES IN BUILD 20240912:

• Added variable head for turbine and pump in PHS (considering variable height of the reservoirs).
• Added variable losses in penstock (turbine and/or pump)
• Added optimization of minimum power (%) of the turbine to be used primarily to supply the load.
• Added the possibility to consider the water tank or reservoir CAPEX (capacity x specific cost), in PHS systems.
• Added optimization of the water tank or upper reservoir in PHS.
• Added cost due to the starts of hydro turbine and of pump.
• Added variable O&M for turbine and for pump.
• Added the possibility to calculate the water tank or reservoir capacity as the maximum obtained in the simulation, with specific limits (in PHS systems).

CHANGES IN BUILD 20240626:

• Fixed bug of not remaining the changes in max. and min. electricity prices for the optimization of strategy of grid-connected batteries (arbitrage, CONTROL STRATEGIES TAB). Now if you change these min. and max. values, the changes will remain.
• Fixed bug when simulating systems with energy arbitrage and hydrogen load.
• Fixed minor bugs.

Changes in build 20240611:

• Fixed bug related to extra cash flow. If you open a previous project where you added “Extra cash flow”, check the value of the last year.
• Fixed bug of the cash flow Excel file generated in build 20240526.
• Fixed minor bugs.

Changes in build 20240603:

• Fixed minor bugs.

Changes in build 20240526:

• Added the possibility to import a file with the hourly values of the whole year for the grid power limit.
• Added another optimization option: minimization of payback period.
• The user can choose to calculate simple payback period or discounted payback period.
• In NPC minimization projects, the payback period is calculated comparing our system with to the only AC grid system, taking into account the difference in investment costs and the savings.
• In NPV minimization projects, the payback period is calculated considering the initial investment of the system and the net incomes.
• In the report and in the cash flow Excel file, the payback period is shown.
• In the report, added levelized cost of storage (LCOS) of the batteries.
• Added the possibility to generate or import PV maintenance shutdown and wind turbines maintenance shutdown hourly files.
• Added the option not update or not the component when we click in the components’ table, if there is a component with the same name in the database (before it was done always, now it is an option in Project->Options, not done by default).
• Improved speed when opening a project.
• Fixed bug when using option of electrolyzer at full load.
• Fixed minor bugs.

Changes in build 20240430:

• In NPC minimization projects, PHS AC hydro turbine (different machine than pump) creates operational reserve, added to diesel, grid and fuel cell.
• In NPC minimization projects, during each time step, if there is AC capacity shortage, added the option to run the PHS AC hydro turbine (different machine than pump) and, if not enough, the backup generator(s) to increase operating reserve and reduce capacity shortage.
• Added minimum backup generator running time.
• In the Excel of the simulation results, shown required operational reserve DC and AC and real reserve DC and AC.
• Fixed bug when calculating IRR in systems with fixed initial CAPEX.
• Fixed minor bugs.

CHANGES IN BUILD 20240424:

• In NPC minimization projects, added the constraint of the maximum capacity shortage.
• Added Power Purchase Agreement (PPA) specific price for the PV energy injected to the grid. Also PPA for the Wind turbines generation injected to the grid.
• Fixed bug when using PHS storage to supply electrical load.
• Fixed bug when using backup generator to create grid reference.
• Fixed minor bugs.

CHANGES IN BUILD 20240327:

• Reduced height of some screens in order to improve visualization in laptops.
• Added checked legend to some graphs.
• Improved PDF graphs of the PDF tab of the simulation screen.
• Fixed minor bugs.