oemof /
oemof-solph
| @@ 297-321 (lines=25) @@ | ||
| 294 | return Constraint(block.MINUPTIMEFLOWS, m.TIMESTEPS, rule=_min_uptime_rule) |
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| 295 | ||
| 296 | ||
| 297 | def _shutdown_constraint(block): |
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| 298 | r""" |
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| 299 | .. math:: |
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| 300 | Y_{shutdown}(t) \geq Y_{status}(t-1) - Y_{status}(t) \\ |
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| 301 | \forall t \in \textrm{TIMESTEPS}, \\ |
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| 302 | \forall \textrm{SHUTDOWNFLOWS}. |
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| 303 | """ |
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| 304 | m = block.parent_block() |
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| 305 | ||
| 306 | def _shutdown_rule(_, i, o, t): |
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| 307 | """Rule definition for shutdown constraints of non-convex flows.""" |
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| 308 | if t > m.TIMESTEPS.at(1): |
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| 309 | expr = ( |
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| 310 | block.shutdown[i, o, t] |
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| 311 | >= block.status[i, o, t - 1] - block.status[i, o, t] |
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| 312 | ) |
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| 313 | else: |
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| 314 | expr = ( |
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| 315 | block.shutdown[i, o, t] |
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| 316 | >= m.flows[i, o].nonconvex.initial_status |
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| 317 | - block.status[i, o, t] |
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| 318 | ) |
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| 319 | return expr |
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| 320 | ||
| 321 | return Constraint(block.SHUTDOWNFLOWS, m.TIMESTEPS, rule=_shutdown_rule) |
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| 322 | ||
| 323 | ||
| 324 | def _startup_constraint(block): |
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| @@ 333-346 (lines=14) @@ | ||
| 330 | """ |
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| 331 | m = block.parent_block() |
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| 332 | ||
| 333 | def _startup_rule(_, i, o, t): |
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| 334 | """Rule definition for startup constraint of nonconvex flows.""" |
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| 335 | if t > m.TIMESTEPS.at(1): |
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| 336 | expr = ( |
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| 337 | block.startup[i, o, t] |
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| 338 | >= block.status[i, o, t] - block.status[i, o, t - 1] |
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| 339 | ) |
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| 340 | else: |
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| 341 | expr = ( |
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| 342 | block.startup[i, o, t] |
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| 343 | >= block.status[i, o, t] |
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| 344 | - m.flows[i, o].nonconvex.initial_status |
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| 345 | ) |
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| 346 | return expr |
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| 347 | ||
| 348 | return Constraint(block.STARTUPFLOWS, m.TIMESTEPS, rule=_startup_rule) |
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| 349 | ||
