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Keep explicit zero directional capacity hard under relax-constraints#2345

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Keep explicit zero directional capacity hard under relax-constraints#2345
sankalpsthakur wants to merge 4 commits into
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sankalpsthakur:fix-2323-explicit-zero-capacity-hard

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@sankalpsthakur sankalpsthakur commented Jul 22, 2026 •
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Description

  • Treat an explicit all-zero production-capacity / consumption-capacity as a physical impossibility, not an economic limit
  • Under relax-constraints (or when breach prices are set), keep the hard derivative bound and do not create soft device capacity FlowCommitments for that direction
  • Non-zero directional capacities may still be softened via breach prices (unchanged; explicit regression)
  • Regression tests: hard bounds + no soft breach commitments for both directions; schedule never produces/consumes when that directional capacity is 0 with a directional breach price set
  • Changelog entry

Context

Fixes #2323

Impact

Severity: physically impossible schedules under default relax-constraints.

Observed (community co-sim, #2323): heat pump with explicit production-capacity: 0 kW scheduled −1.764 kW production when site capacity was tight and site breach prices (10 000 EUR/kW) dwarfed device breach prices (100 EUR/kW). The LP rationally breached a soft zero-capacity commitment.

Root cause: explicit zero was turned into a soft FlowCommitment; hard bound stayed at symmetric -power-capacity. Breach prices soften limits, not impossibilities (#2272 spirit).

Workaround before this fix: set is_strictly_non_positive on consumption-only sensors.

How to test

pytest \
  flexmeasures/data/models/planning/tests/test_solver.py::test_explicit_zero_directional_capacity_stays_hard_under_relax_constraints \
  flexmeasures/data/models/planning/tests/test_solver.py::test_non_zero_directional_capacity_still_softens_under_breach_price \
  flexmeasures/data/models/planning/tests/test_solver.py::test_explicit_zero_directional_capacity_not_breached_in_schedule \
  flexmeasures/data/models/planning/tests/test_solver.py::test_device_power_capacity_uses_directional_capacity_before_site_fallback \
  flexmeasures/data/models/planning/tests/test_solver.py::test_capacity \
  -v

Related Items

Sign-off

  • I agree to contribute to the project under Apache 2 License.
  • To the best of my knowledge, the proposed patch is not based on code under GPL or other license that is incompatible with FlexMeasures
  • Added changelog item in documentation/changelog.rst

sankalpsthakur added a commit to sankalpsthakur/flexmeasures that referenced this pull request Jul 22, 2026
@sankalpsthakur
docs: fill changelog PR number for FlexMeasures#2345
c5654f3 
Signed-off-by: Sankalp Thakur <sankalphimself@gmail.com>
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read-the-docs-community Bot commented Jul 22, 2026 •
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Documentation build overview

📚 flexmeasures | 🛠️ Build #33713955 | 📁 Comparing 1658c13 against latest (9acc4eb)

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± Modified

@sankalpsthakur
sankalpsthakur force-pushed the fix-2323-explicit-zero-capacity-hard branch 2 times, most recently from 128c669 to 076a8d0 Compare July 22, 2026 18:18
@sankalpsthakur
Keep explicit zero directional capacity as a hard bound
e5a5cd7 
With relax-constraints defaulting to True, an explicit
production-capacity: 0 (or consumption-capacity: 0) was turned into a
soft FlowCommitment whenever breach prices were present. The LP could
then schedule power in a physically impossible direction (e.g. produce
from a heat pump).

Treat an all-zero directional capacity as a physical impossibility:
keep the hard derivative bound and skip soft breach commitments.
Non-zero (economic) capacity limits may still be relaxed.

Fixes FlexMeasures#2323

Signed-off-by: Sankalp Thakur <sankalphimself@gmail.com>
@sankalpsthakur
test: non-zero directional capacity still softens under breach prices
f77052d 
Companion regression for FlexMeasures#2323: only explicit zero stays hard; economic
non-zero production/consumption capacities must still create soft breach
commitments.

Signed-off-by: Sankalp Thakur <sankalphimself@gmail.com>
@sankalpsthakur
test: cover consumption-capacity 0 schedule path for FlexMeasures#2323
8ec7149 
Parametrize the end-to-end schedule regression so both production and
consumption explicit zeros stay hard under directional breach prices.

Signed-off-by: Sankalp Thakur <sankalphimself@gmail.com>
@sankalpsthakur
sankalpsthakur force-pushed the fix-2323-explicit-zero-capacity-hard branch from 076a8d0 to 8ec7149 Compare July 22, 2026 19:03
@sankalpsthakur @cursoragent
test: cross-ref FlexMeasures#2329 EVSE discharge in zero-capacity reg…
1658c13 
…ression

Signed-off-by: Sankalp Thakur <sankalphimself@gmail.com>
Co-authored-by: Cursor <cursoragent@cursor.com>
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Explicit zero directional capacity should stay a hard constraint under relax-constraints

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