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Redundant constraints in storage_symmetric #566

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cfe316 opened this issue Oct 13, 2023 · 2 comments
Closed

Redundant constraints in storage_symmetric #566

cfe316 opened this issue Oct 13, 2023 · 2 comments

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@cfe316
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cfe316 commented Oct 13, 2023 

# Maximum charging rate (including virtual charging to move energy held in reserve back to available storage) must be less than symmetric power rating
[y in STOR_SYMMETRIC, t in 1:T], EP[:vCHARGE][y,t] + EP[:vCAPRES_charge][y,t] <= EP[:eTotalCap][y]

# Max simultaneous charge and discharge cannot be greater than capacity
[y in STOR_SYMMETRIC, t in 1:T], EP[:vP][y,t]+EP[:vCHARGE][y,t]+EP[:vCAPRES_discharge][y,t]+EP[:vCAPRES_charge][y,t] <= EP[:eTotalCap][y]
  • all these quantities are positive
  • the LHS of the second constraint equals the LHS of the first constraint plus some extra terms.
  • both RHS's are the same.
    Therefore the first constraint is redundant. Not sure if we want to remove it, or keep it for future expansion/didactic reasons.
@cfe316
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cfe316 commented Oct 13, 2023

This would be addressed by #562 .

cfe316 added a commit that referenced this issue Nov 18, 2023
@cfe316 @lbonaldo
Refactor reserves (#562)
2ef54dc 
This fixes #573, where Reserves + Num_VRE_Bins > 1 would lead to the
VRE_NO_POWER_OUT resources being able to contribute an infinite amount
to the reserves.

This fixes #574, where VRE power output constraints were being applied
length(VRE) times to all VRE resources, when Reserves = 1.

This fixed #566, where some constraints in storage_symmetric were redundant.
---------

Co-authored-by: Luca Bonaldo <[email protected]>
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cfe316 commented Nov 18, 2023

The fix for this has been merged to develop.

@cfe316 cfe316 closed this as completed Nov 18, 2023
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