Merge pull request #41 from NREL/capacity_credits

Capacity credits

examples/H2_Analysis/results/Annual Cashflows_Georgia_2030 Advanced_2035_discount_0.07.csv

@@ -1,4 +1,4 @@
 ,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30
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examples/H2_Analysis/results/Annual Cashflows_Georgia_2030 Conservative_2035_discount_0.07.csv

@@ -1,4 +1,4 @@
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examples/H2_Analysis/results/Annual Cashflows_Georgia_2030 Moderate_2035_discount_0.07.csv

@@ -1,4 +1,4 @@
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examples/H2_Analysis/results/Annual Cashflows_TexasTest_2030 Conservative_2035_discount_0.07.csv

@@ -1,4 +1,4 @@
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hybrid/battery.py

@@ -259,7 +259,6 @@ def simulate_financials(self, interconnect_kw: float, project_life: int, cap_cre
         else:
             self._financial_model.Lifetime.system_use_lifetime_output = 0
         self._financial_model.FinancialParameters.analysis_period = project_life
-        self._financial_model.CapacityPayments.cp_system_nameplate = min(interconnect_kw, self.system_capacity_kw)
         self._financial_model.SystemCosts.om_batt_nameplate = self.system_capacity_kw
         try:
             if self._financial_model.SystemCosts.om_production != 0:

hybrid/csp_source.py

@@ -667,7 +667,6 @@ def simulate_financials(self, interconnect_kw: float, project_life: int = 25, ca
         # TODO: avoid using ssc data here?
         nameplate_capacity_kw = self.cycle_capacity_kw * self.ssc.get('gross_net_conversion_factor')
         self._financial_model.value("system_capacity", min(nameplate_capacity_kw, interconnect_kw))
-        self._financial_model.value("cp_system_nameplate", min(nameplate_capacity_kw, interconnect_kw))
         self._financial_model.value("total_installed_cost", self.calculate_total_installed_cost())
         # need to store for later grid aggregation
         self.gen_max_feasible = self.calc_gen_max_feasible_kwh(interconnect_kw, cap_cred_avail_storage)

hybrid/grid.py

@@ -76,6 +76,19 @@ def simulate_grid_connection(self, hybrid_size_kw: float, total_gen: list, proje
         # FIXME: updating capacity credit for reporting only.
         self.capacity_credit_percent = self.capacity_credit_percent * (self.system_capacity_kw / self.interconnect_kw)
 
+    def calc_gen_max_feasible_kwh(self, interconnect_kw: float) -> list:
+        """
+        Calculates the maximum feasible generation profile that could have occurred (year 1)
+
+        :param interconnect_kw: Interconnection limit [kW]
+
+        :return: maximum feasible generation [kWh]
+        """
+        W_ac_nom = self.calc_nominal_capacity(interconnect_kw)
+        t_step = self.site.interval / 60                                                # hr
+        E_net_max_feasible = [min(x,W_ac_nom) * t_step for x in self.total_gen_max_feasible_year1[0:self.site.n_timesteps]]      # [kWh]
+        return E_net_max_feasible
+
     @property
     def system_capacity_kw(self) -> float:
         return self._financial_model.SystemOutput.system_capacity

hybrid/hybrid_simulation.py

@@ -401,11 +401,6 @@ def set_logical_or_for_hybrid(var_name):
 
         # Debt and Financing should be handled via user customization of the grid's financial model
 
-        # capacity payments
-        # for v in generators:
-        #     v.value("cp_system_nameplate", v.system_capacity_kw)
-        # self.grid.value("cp_system_nameplate", hybrid_size_kw)
-
         # O&M Cost
         set_average_for_hybrid("om_capacity", size_ratios)
         set_average_for_hybrid("om_fixed", [1] * len(generators))
@@ -498,6 +493,7 @@ def simulate_power(self, project_life: int = 25, lifetime_sim=False):
 
         # Put the hybrid together for grid simulation
         hybrid_size_kw = 0
+        hybrid_nominal_capacity = 0
         total_gen = np.zeros(self.site.n_timesteps * project_life)
         total_gen_before_battery = np.zeros(self.site.n_timesteps * project_life)
         total_gen_max_feasible_year1 = np.zeros(self.site.n_timesteps)
@@ -506,7 +502,8 @@ def simulate_power(self, project_life: int = 25, lifetime_sim=False):
             if system != 'grid':
                 model = getattr(self, system)
                 if model:
-                    hybrid_size_kw += model.system_capacity_kw #model.calc_nominal_capacity(self.interconnect_kw)
+                    hybrid_size_kw += model.system_capacity_kw
+                    hybrid_nominal_capacity += model.calc_nominal_capacity(self.interconnect_kw)
                     project_life_gen = np.tile(model.generation_profile, int(project_life / (len(model.generation_profile) // self.site.n_timesteps)))
                     if len(project_life_gen) != len(total_gen):
                         raise ValueError("Generation profile, `gen`, from system {} should have length that divides"
@@ -515,12 +512,15 @@ def simulate_power(self, project_life: int = 25, lifetime_sim=False):
                     if system in non_dispatchable_systems:
                         total_gen_before_battery += project_life_gen
                     total_gen += project_life_gen
+                    model.gen_max_feasible = model.calc_gen_max_feasible_kwh(self.interconnect_kw)
                     total_gen_max_feasible_year1 += model.gen_max_feasible
 
         # Consolidate grid generation by copying over power and storage generation information
         if self.battery:
             self.grid.generation_profile_wo_battery = total_gen_before_battery
         self.grid.simulate_grid_connection(hybrid_size_kw, total_gen, project_life, lifetime_sim, total_gen_max_feasible_year1)
+        self.grid.hybrid_nominal_capacity = hybrid_nominal_capacity
+        self.grid.total_gen_max_feasible_year1 = total_gen_max_feasible_year1
         logger.info(f"Hybrid Peformance Simulation Complete. AEPs are {self.annual_energies}.")
 
     def simulate_financials(self, project_life):
@@ -701,23 +701,6 @@ def capacity_factors(self) -> HybridSimulationOutput:
         cf.hybrid = (hybrid_generation / hybrid_capacity) / 87.6
         return cf
 
-    @property
-    def capacity_credit_percent(self) -> HybridSimulationOutput:
-        """Hybrid Capacity credit (eligible portion of nameplate) by technology [%]"""
-        cap_cred = self.outputs_factory.create()
-        if self.pv:
-            cap_cred.pv = self.pv.capacity_credit_percent
-        if self.wind:
-            cap_cred.wind = self.wind.capacity_credit_percent
-        if self.tower:
-            cap_cred.tower = self.tower.capacity_credit_percent
-        if self.trough:
-            cap_cred.trough = self.trough.capacity_credit_percent
-        if self.battery:
-            cap_cred.battery = self.battery.capacity_credit_percent
-        cap_cred.hybrid = self.grid.capacity_credit_percent
-        return cap_cred
-
     def _aggregate_financial_output(self, name, start_index=None, end_index=None) -> HybridSimulationOutput:
         """Helper function for aggregating hybrid financial outputs"""
         out = self.outputs_factory.create()
@@ -734,6 +717,16 @@ def _aggregate_financial_output(self, name, start_index=None, end_index=None) ->
                 setattr(out, k, val)
         return out
 
+    @property
+    def system_nameplate_mw(self) -> HybridSimulationOutput:
+        """System nameplate capacity [MW]"""
+        return self._aggregate_financial_output("system_nameplate_mw")
+
+    @property
+    def capacity_credit_percent(self) -> HybridSimulationOutput:
+        """Capacity credit (eligible portion of nameplate) by technology [%]"""
+        return self._aggregate_financial_output("capacity_credit_percent")
+
     @property
     def cost_installed(self) -> HybridSimulationOutput:
         """The total_installed_cost plus any financing costs [$]"""