Branch 4: BA81 GEN cutoff audit + exekuce při sell<0

backend/services/planning_engine.py

@@ -71,7 +71,7 @@ NEG_BUY_CHARGE_SHORTFALL_PENALTY_CZK_KWH = 100.0
 PRE_NEG_CHARGE_PENALTY_CZK_KWH = 400.0
 PRE_NEG_BATT_EXPORT_SHORTFALL_PENALTY_CZK_KWH = 80.0
 PRE_NEG_BATT_EXPORT_MIN_SELL_CZK_KWH = 1.0
-PLANNER_BUILD_TAG = "2026-06-06-charge-slot-budget-v1"
+PLANNER_BUILD_TAG = "2026-06-06-ba81-gen-cutoff-exec-v1"
 SOLVER_RELAX_STEPS: tuple[str, ...] = (
     "strict",
     "relaxed_expensive_import",
@@ -3879,6 +3879,8 @@ def solve_dispatch(
             prob += ge[t] == 0
             prob += ge_pv[t] == 0
             prob += ge_bat[t] == 0
+            if z_gen_cutoff is not None and float(s.sell_price) < 0.0:
+                prob += z_gen_cutoff[t] == 1
             # PV A: měkký tlak curtail (NEG_SELL_CURTAIL při buy<0), ne tvrdé bc_pv=0
             # (s polem B a bilancí může být bc_pv=0 nutné pro řešitelnost krátkých okének).
 
@@ -3967,6 +3969,13 @@ def solve_dispatch(
                     )
                     prob += ge_pv[t] <= float(s.pv_b_forecast_w) * w_pv_b_vent
 
+            # GEN/MI cut-off ON když LP zakazuje vývoz — bez cut-off únik PV B na GEN portu do sítě.
+            if z_gen_cutoff is not None:
+                if block_neg_sell_export_t or purchase_fixed_pre:
+                    prob += z_gen_cutoff[t] == 1
+                elif block_pv_export_neg_sell:
+                    prob += z_gen_cutoff[t] == 1
+
         soc_prev_expr = current_soc_wh if t == 0 else soc[t - 1]
         arb_t = arb_floor_series[t]
         soc_low_t = soc_panel_min[t]