Facility Fixed Production
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Facility Fixed Production

Units:-
Mode:Input/Output
Multi-band:False
Default Value:0
Validation Rule:Any Value
Key Property:No
Description:Fixed (exact) production
Input

Facility Fixed Production defines a fixed profile of Production from the facility i.e. it constrains the Production to be exactly this value subject to availability.


How the value of Fixed Production is interpreted depends on the Fixed Production Global setting. It controls whether the value is across all units at the facility or unit-by-unit.

Fixed Production over-rides other constraints such as Min Operating Level, Max Ramp Up, and Max Ramp Down.

In the example in Table 1 the facility will be dispatched to follow the given profile (15 in hour 1 of Monday and 25 on hour 2 Monday) and beyond that it will follow dispatch according to its costs.

Table 1: Example of Fixed Production when Fixed Production Method = "Relax When Zero"
Property Value Units Band Date From Date To Timeslice
Units 1 - 1


Max Operating Level 250 - 1


Fixed Production 15 - 1

W2,H1
Fixed Production 25 - 1

W2,H2


In the example in Table 2 the facility will follow a series of values defined in the Data File "FIXED" but only for the specific date ranges shown, other times the dispatch is optimized normally.

Table 2: Example of Fixed Production when Fixed Production Method = "Enforce Zero Values"
Property Value Units Band Date From Date To Timeslice Data File
Fixed Production -1 - 1



Fixed Production 0 - 1 Tuesday, 1 December 2009 06:00:00 Tuesday, 4 May 2010 06:00:00
FIXED
Fixed Production 0 - 1 Friday, 7 May 2010 06:00:00 Saturday, 8 May 2010 06:00:00
FIXED


By default the Fixed Production constraint is a hard constraint meaning that no violations are allowed. You can optionally make the constraint 'soft' and introduce a penalty price with the property Fixed Production Penalty. The frequency, quantity and cost of violations are reported in the properties:


Note that Fixed Production is automatically derated by the Facility Forced Outage Rate and Maintenance Rate in non-chronological simulation phases e.g. when LT Plan or MT Schedule are using load duration curves. This is done to simulate the effect of outages on the ability of the station to meet the Fixed Operating Level requirement.

Output

Facility Fixed Production is the Production attributable to the Fixed Production constraint, and is defined as:

Fixed Production = Production - Fixed Production Violation

See also: