324 lines
22 KiB
Python
324 lines
22 KiB
Python
import os
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import sys
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from datetime import datetime
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import matplotlib.pyplot as plt
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import numpy as np
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current = os.path.dirname(os.path.realpath('Main_Programm.ipynb'))
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parent = os.path.dirname(current)
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sys.path.append(parent)
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from Ausgleichsbecken.Ausgleichsbecken_class_file import Ausgleichsbecken_class
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from Druckrohrleitung.Druckrohrleitung_class_file import Druckrohrleitung_class
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from functions.pressure_conversion import pressure_conversion
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from Kraftwerk.Kraftwerk_class_file import Kraftwerk_class
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from Regler.Regler_class_file import PI_controller_class
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from Turbinen.Turbinen_class_file import Francis_Turbine
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Area_list = np.round(np.arange(40.,90.,5.),1)
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Kp_list = np.round(np.arange(0.1,3.0,0.2),1)
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Ti_list = np.round(np.arange(10.,300.,10.),1)
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for i in range(np.size(Area_list)):
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for j in range(np.size(Kp_list)):
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for k in range(np.size(Ti_list)):
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now = datetime.now()
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current_time = now.strftime("%H:%M:%S")
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print("Current Time =", current_time)
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print('i = ',i, '/ ', str(np.size(Area_list)-1))
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print('j = ',j, '/ ', str(np.size(Kp_list)-1))
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print('k = ',k, '/ ', str(np.size(Ti_list)-1))
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print('area = ',Area_list[i])
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print('K_p = ',Kp_list[j])
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print('T_i = ',Ti_list[k])
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with open('log.txt','a') as f:
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f.write("Current Time =" + current_time + '\n')
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f.write('i = '+str(i)+ '/ '+ str(np.size(Area_list)-1)+ '\n')
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f.write('j = '+str(j)+ '/ '+ str(np.size(Kp_list)-1)+ '\n')
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f.write('k = '+str(k)+ '/ '+ str(np.size(Ti_list)-1)+ '\n')
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f.write('area = '+str(Area_list[i])+ '\n')
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f.write('K_p = '+str(Kp_list[j])+ '\n')
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f.write('T_i = '+str(Ti_list[k])+ '\n')
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# define constants
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# for physics
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g = 9.81 # [m/s²] gravitational acceleration
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rho = 0.9982067*1e3 # [kg/m³] density of water
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pUnit_calc = 'Pa' # [string] DO NOT CHANGE! for pressure conversion in print statements and plot labels
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pUnit_conv = 'mWS' # [string] for pressure conversion in print statements and plot labels
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# for KW OL
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OL_T1_Q_nenn = 1.7 # [m³/s] nominal flux of turbine
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OL_T1_p_nenn = pressure_conversion(1,'bar',pUnit_calc) # [Pa] nominal pressure of turbine ## p_nenn wird konstant gehalten, Wert ist also fiktiv
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OL_p_pseudo = 1.1*OL_T1_p_nenn # ficticious pressure applied to OL turbines to avoid LA>1 error caused by unfortunate rounding
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OL_T1_closingTime = 30. # [s] closing time of turbine
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# simulation of "Bacheinzug"
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OL_T2_Q_nenn = 1.5 # [m³/s] nominal flux of turbine
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OL_T2_p_nenn = pressure_conversion(1,'bar',pUnit_calc) # [Pa] nominal pressure of turbine ## p_nenn wird konstant gehalten, Wert ist also fiktiv
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OL_T2_closingTime = 600. # [s] closing time of turbine
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# for KW UL
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UL_T1_Q_nenn = 1.6 # [m³/s] nominal flux of turbine
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UL_T1_p_nenn = pressure_conversion(60.,'mWS',pUnit_calc) # [Pa] nominal pressure of turbine
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UL_T1_closingTime = 30. # [s] closing time of turbine
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UL_T2_Q_nenn = 1.6 # [m³/s] nominal flux of turbine
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UL_T2_p_nenn = pressure_conversion(60.,'mWS',pUnit_calc) # [Pa] nominal pressure of turbine
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UL_T2_closingTime = 30. # [s] closing time of turbine
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# for PI controller
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Con_targetLevel = 1.25 # [m]
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Con_K_p = Kp_list[j] # [-] proportional constant of PI controller
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Con_T_i = Ti_list[k] # [s] timespan in which a steady state error is corrected by the intergal term
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Con_deadbandRange = 0.00 # [m] Deadband range around targetLevel for which the controller does NOT intervene
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# for pipeline
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Pip_length = 2300. # [m] length of pipeline
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Pip_dia = 1.5 # [m] diameter of pipeline
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Pip_area = Pip_dia**2/4*np.pi # [m²] crossectional area of pipeline
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Pip_head = 68. # [m] hydraulic head of pipeline without reservoir
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Pip_angle = np.arcsin(Pip_head/Pip_length) # [rad] elevation angle of pipeline
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Pip_n_seg = 50 # [-] number of pipe segments in discretization
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Pip_f_D = 0.015 # [-] Darcy friction factor
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Pip_pw_vel = 600. # [m/s] propagation velocity of the pressure wave (pw) in the given pipeline
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# derivatives of the pipeline constants
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Pip_dx = Pip_length/Pip_n_seg # [m] length of each pipe segment
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Pip_dt = Pip_dx/Pip_pw_vel # [s] timestep according to method of characteristics
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Pip_nn = Pip_n_seg+1 # [1] number of nodes
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Pip_x_vec = np.arange(0,Pip_nn,1)*Pip_dx # [m] vector holding the distance of each node from the upstream reservoir along the pipeline
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Pip_h_vec = np.arange(0,Pip_nn,1)*Pip_head/Pip_n_seg # [m] vector holding the vertival distance of each node from the upstream reservoir
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# for reservoir
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Res_area_base = Area_list[i] # [m²] total base are of the cuboid reservoir
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Res_area_out = Pip_area # [m²] outflux area of the reservoir, given by pipeline area
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Res_level_crit_lo = Con_targetLevel-0.5 # [m] for yet-to-be-implemented warnings
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Res_level_crit_hi = np.inf # [m] for yet-to-be-implemented warnings
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Res_dt_approx = 1e-3 # [s] approx. timestep of reservoir time evolution to ensure numerical stability (see Res_nt why approx.)
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Res_nt = max(1,int(Pip_dt//Res_dt_approx)) # [1] number of timesteps of the reservoir time evolution within one timestep of the pipeline
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Res_dt = Pip_dt/Res_nt # [s] harmonised timestep of reservoir time evolution
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# for general simulation
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# flux_init = OL_T1_Q_nenn+OL_T2_Q_nenn # [m³/s] initial flux through whole system for steady state initialization
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OL_LAs_init = [1./1.1,0.3] # [vec] initial guide vane openings of OL-KW
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level_init = Con_targetLevel # [m] initial water level in upstream reservoir for steady state initialization
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simTime_target = 1200. # [s] target for total simulation time (will vary slightly to fit with Pip_dt)
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nt = int(simTime_target//Pip_dt) # [1] Number of timesteps of the whole system
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t_vec = np.arange(0,nt+1,1)*Pip_dt # [s] time vector. At each step of t_vec the system parameters are stored
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# create objects
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# influx setting turbines
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OL_T1 = Francis_Turbine(OL_T1_Q_nenn,OL_T1_p_nenn,OL_T1_closingTime,Pip_dt,pUnit_conv)
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OL_T2 = Francis_Turbine(OL_T2_Q_nenn,OL_T2_p_nenn,OL_T2_closingTime,Pip_dt,pUnit_conv)
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KW_OL = Kraftwerk_class()
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KW_OL.add_turbine(OL_T1)
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KW_OL.add_turbine(OL_T2)
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KW_OL.set_steady_state_by_LA(OL_LAs_init,OL_p_pseudo)
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flux_init = KW_OL.get_current_Q()
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# Upstream reservoir
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reservoir = Ausgleichsbecken_class(Res_area_base,Res_area_out,Res_dt,pUnit_conv,Res_level_crit_lo,Res_level_crit_hi,rho)
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reservoir.set_steady_state(flux_init,level_init)
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# pipeline
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pipe = Druckrohrleitung_class(Pip_length,Pip_dia,Pip_head,Pip_n_seg,Pip_f_D,Pip_pw_vel,Pip_dt,pUnit_conv,rho)
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pipe.set_steady_state(flux_init,reservoir.get_current_pressure())
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# downstream turbines
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UL_T1 = Francis_Turbine(UL_T1_Q_nenn,UL_T1_p_nenn,UL_T1_closingTime,Pip_dt,pUnit_conv)
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UL_T2 = Francis_Turbine(UL_T2_Q_nenn,UL_T2_p_nenn,UL_T2_closingTime,Pip_dt,pUnit_conv)
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KW_UL = Kraftwerk_class()
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KW_UL.add_turbine(UL_T1)
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KW_UL.add_turbine(UL_T2)
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KW_UL.set_steady_state_by_flux(flux_init,pipe.get_current_pressure_distribution()[-1])
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# level controller
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level_control = PI_controller_class(Con_targetLevel,Con_deadbandRange,Con_K_p,Con_T_i,Pip_dt)
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level_control.set_control_variable(UL_T1.get_current_LA(),display_warning=False)
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# initialization for Timeloop
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# pipeline
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v_old = pipe.get_current_velocity_distribution() # storing the velocity from the last timestep
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v_min = pipe.get_lowest_velocity_per_node() # storing minimal flux velocity at each node
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v_max = pipe.get_highest_velocity_per_node() # storing maximal flux velocity at each node
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Q_old = pipe.get_current_flux_distribution() # storing the flux from the last timestep
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Q_min = pipe.get_lowest_flux_per_node() # storing minimal flux at each node
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Q_max = pipe.get_highest_flux_per_node() # storing maximal flux at each node
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p_old = pipe.get_current_pressure_distribution() # storing the pressure from the last timestep
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p_min = pipe.get_lowest_pressure_per_node() # storing minimal pressure at each node
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p_max = pipe.get_highest_pressure_per_node() # storing maximal pressure at each node
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p_0 = pipe.get_initial_pressure_distribution() # storing initial pressure at each node
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v_boundary_res = np.zeros_like(t_vec) # storing the boundary velocity at the reservoir
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v_boundary_tur = np.zeros_like(t_vec) # storing the boundary velocity at the turbine
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Q_boundary_res = np.zeros_like(t_vec) # storing the boundary flux at the reservoir
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Q_boundary_tur = np.zeros_like(t_vec) # storing the boundary flux at the turbine
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p_boundary_res = np.zeros_like(t_vec) # storing the boundary pressure at the reservoir
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p_boundary_tur = np.zeros_like(t_vec) # storing the boundary pressure at the turbine
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v_boundary_res[0] = v_old[0] # storing the initial value for the boundary velocity at the reservoir
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v_boundary_tur[0] = v_old[-1] # storing the initial value for the boundary velocity at the turbine
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Q_boundary_res[0] = Q_old[0] # storing the initial value for the boundary flux at the reservoir
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Q_boundary_tur[0] = Q_old[-1] # storing the initial value for the boundary flux at the turbine
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p_boundary_res[0] = p_old[0] # storing the initial value for the boundary pressure at the reservoir
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p_boundary_tur[0] = p_old[-1] # storing the initial value for the boundary pressure at the turbine
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# reservoir
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Q_in_vec = np.zeros_like(t_vec) # storing the influx to the reservoir
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Q_in_vec[0] = flux_init # storing the initial influx to the reservoir
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# Outflux from reservoir is stored in Q_boundary_res
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level_vec = np.zeros_like(t_vec) # storing the level in the reservoir at the end of each pipeline timestep
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level_vec[0] = level_init # storing the initial level in the reservoir
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volume_vec = np.zeros_like(t_vec) # storing the volume in the reservoir at the end of each pipeline timestep
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volume_vec[0] = reservoir.get_current_volume() # storing the initial volume in the reservoir
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# OL KW
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# manual input to modulate influx
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OL_T1_LA_soll_vec = np.full_like(t_vec,OL_T1.get_current_LA()) # storing the target value for the guide van opening
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OL_T1_LA_soll_vec[np.argmin(np.abs(t_vec-100)):] = 0.
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OL_T1_LA_soll_vec[np.argmin(np.abs(t_vec-600)):] = OL_T1_LA_soll_vec[0]
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OL_T2_LA_soll_vec = np.full_like(t_vec,OL_T2.get_current_LA()) # storing the target value for the guide van opening
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OL_T1_LA_ist_vec = np.zeros_like(t_vec) # storing the actual value of the guide vane opening
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OL_T1_LA_ist_vec[0] = OL_T1.get_current_LA() # storing the initial value of the guide vane opening
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OL_T2_LA_ist_vec = np.zeros_like(t_vec) # storing the actual value of the guide vane opening
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OL_T2_LA_ist_vec[0] = OL_T2.get_current_LA() # storing the initial value of the guide vane opening
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# UL KW
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UL_T1_LA_soll_vec = np.zeros_like(t_vec) # storing the target value of the guide vane opening
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UL_T1_LA_soll_vec[0] = UL_T1.get_current_LA()
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UL_T2_LA_soll_vec = np.zeros_like(t_vec) # storing the target value of the guide vane opening
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UL_T2_LA_soll_vec[0] = UL_T2.get_current_LA()
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UL_T1_LA_ist_vec = np.zeros_like(t_vec) # storing the actual value of the guide vane opening
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UL_T1_LA_ist_vec[0] = UL_T1.get_current_LA() # storing the initial value of the guide vane opening
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UL_T2_LA_ist_vec = np.zeros_like(t_vec) # storing the actual value of the guide vane opening
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UL_T2_LA_ist_vec[0] = UL_T2.get_current_LA() # storing the initial value of the guide vane opening
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# time loop
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# needed for turbine convergence
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convergence_parameters = [p_old[-2],v_old[-2],Pip_dia,Pip_area,Pip_angle,Pip_f_D,Pip_pw_vel,rho,Pip_dt,p_old[-1]]
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# loop through time steps of the pipeline
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for it_pipe in range(1,nt+1):
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KW_OL.update_LAs([OL_T1_LA_soll_vec[it_pipe],OL_T2_LA_soll_vec[it_pipe]])
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KW_OL.set_pressure(OL_p_pseudo)
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Q_in_vec[it_pipe] = KW_OL.get_current_Q()
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reservoir.set_influx(Q_in_vec[it_pipe])
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# for each pipeline timestep, execute Res_nt timesteps of the reservoir code
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# set initial condition for the reservoir time evolution calculted with the timestep_reservoir_evolution() method
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reservoir.set_pressure(p_old[0],display_warning=False)
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reservoir.set_outflux(Q_old[0],display_warning=False)
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# calculate the time evolution of the reservoir level within each pipeline timestep to avoid runaway numerical error
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for it_res in range(Res_nt):
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reservoir.timestep_reservoir_evolution()
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level_vec[it_pipe] = reservoir.get_current_level()
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volume_vec[it_pipe] = reservoir.get_current_volume()
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level_control.update_control_variable(level_vec[it_pipe])
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UL_T1_LA_soll_vec[it_pipe] = level_control.get_current_control_variable()
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UL_T2_LA_soll_vec[it_pipe] = level_control.get_current_control_variable()
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# change the guide vane opening based on the target value and closing time limitation
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KW_UL.update_LAs([UL_T1_LA_soll_vec[it_pipe],UL_T2_LA_soll_vec[it_pipe]])
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OL_T1_LA_ist_vec[it_pipe], OL_T2_LA_ist_vec[it_pipe] = KW_OL.get_current_LAs()
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UL_T1_LA_ist_vec[it_pipe], UL_T2_LA_ist_vec[it_pipe] = KW_UL.get_current_LAs()
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# set boundary condition for the next timestep of the characteristic method
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convergence_parameters[0] = p_old[-2]
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convergence_parameters[1] = v_old[-2]
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convergence_parameters[9] = p_old[-1]
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KW_UL.set_pressure(p_old[-1])
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KW_UL.converge(convergence_parameters)
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p_boundary_res[it_pipe] = reservoir.get_current_pressure()
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v_boundary_tur[it_pipe] = 1/Pip_area*KW_UL.get_current_Q()
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Q_boundary_tur[it_pipe] = KW_UL.get_current_Q()
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# the the boundary condition in the pipe.object and thereby calculate boundary pressure at turbine
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pipe.set_boundary_conditions_next_timestep(p_boundary_res[it_pipe],v_boundary_tur[it_pipe])
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# pipe.v[0] = (0.8*pipe.v[0]+0.2*reservoir.get_current_outflux()/Res_area_out) # unnecessary
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p_boundary_tur[it_pipe] = pipe.get_current_pressure_distribution()[-1]
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v_boundary_res[it_pipe] = pipe.get_current_velocity_distribution()[0]
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Q_boundary_res[it_pipe] = pipe.get_current_flux_distribution()[0]
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# perform the next timestep via the characteristic method
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pipe.timestep_characteristic_method_vectorized()
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# prepare for next loop
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p_old = pipe.get_current_pressure_distribution()
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v_old = pipe.get_current_velocity_distribution()
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Q_old = pipe.get_current_flux_distribution()
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level_plot_min = 0
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level_plot_max = 3
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volume_plot_min = level_plot_min*Res_area_base
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volume_plot_max = level_plot_max*Res_area_base
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fig3,axs3 = plt.subplots(2,2,figsize=(16,9))
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fig3.suptitle('Fläche = '+str(Res_area_base)+'\n'+'Kp = '+str(Con_K_p)+' Ti = '+str(Con_T_i))
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axs3[0,0].set_title('Level and Volume reservoir')
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axs3[0,0].plot(t_vec,level_vec,label='level')
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axs3[0,0].plot(t_vec,np.full_like(t_vec,Res_level_crit_lo),label='level_min',c='r')
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axs3[0,0].set_xlabel(r'$t$ [$\mathrm{s}$]')
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axs3[0,0].set_ylabel(r'$h$ [m]')
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axs3[0,0].set_ylim(level_plot_min,level_plot_max)
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x_twin_00 = axs3[0,0].twinx()
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x_twin_00.set_ylabel(r'$V$ [$\mathrm{m}^3$]')
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x_twin_00.plot(t_vec,volume_vec)
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x_twin_00.set_ylim(volume_plot_min,volume_plot_max)
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axs3[0,0].legend()
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axs3[0,1].set_title('LA')
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axs3[0,1].plot(t_vec,100*OL_T1_LA_soll_vec,label='OL_T1 Target',c='b')
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axs3[0,1].scatter(t_vec[::200],100*OL_T1_LA_ist_vec[::200],label='OL_T1 Actual',c='b',marker='+')
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axs3[0,1].plot(t_vec,100*OL_T2_LA_soll_vec,label='OL_T2 Target',c='g')
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axs3[0,1].scatter(t_vec[::200],100*OL_T2_LA_ist_vec[::200],label='OL_T2 Actual',c='g',marker='+')
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axs3[0,1].plot(t_vec,100*UL_T1_LA_soll_vec,label='UL_T1 Target',c='r')
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axs3[0,1].scatter(t_vec[::200],100*UL_T1_LA_ist_vec[::200],label='UL_T1 Actual',c='r',marker='+')
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axs3[0,1].plot(t_vec,100*UL_T2_LA_soll_vec,label='UL_T2 Target',c='k')
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axs3[0,1].scatter(t_vec[::200],100*UL_T2_LA_ist_vec[::200],label='UL_T2 Actual',c='k',marker='+')
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axs3[0,1].set_xlabel(r'$t$ [$\mathrm{s}$]')
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axs3[0,1].set_ylabel(r'$LA$ [%]')
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axs3[0,1].legend()
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axs3[1,0].set_title('Fluxes')
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axs3[1,0].plot(t_vec,Q_in_vec,label='Influx')
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axs3[1,0].plot(t_vec,Q_boundary_res,label='Outflux')
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axs3[1,0].scatter(t_vec[::200],Q_boundary_tur[::200],label='Flux Turbine',c='g',marker='+')
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axs3[1,0].set_xlabel(r'$t$ [$\mathrm{s}$]')
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axs3[1,0].set_ylabel(r'$Q$ [$\mathrm{m}^3/\mathrm{s}$]')
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axs3[1,0].legend()
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axs3[1,1].set_title('Pressure change vs t=0 at reservoir and turbine')
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axs3[1,1].plot(t_vec,pressure_conversion(p_boundary_res-p_boundary_res[0],pUnit_calc, pUnit_conv),label='Reservoir')
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axs3[1,1].plot(t_vec,pressure_conversion(p_boundary_tur-p_boundary_tur[0],pUnit_calc, pUnit_conv),label='Turbine')
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axs3[1,1].set_xlabel(r'$t$ [$\mathrm{s}$]')
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axs3[1,1].set_ylabel(r'$p$ ['+pUnit_conv+']')
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axs3[1,1].legend()
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fig3.tight_layout()
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# plt.show()
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plt.close()
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figname = 'Simulation Arriach\\Lastfall_2\\KW_Arriach_Fläche_'+str(Res_area_base)+'_Ti_'+str(Con_T_i)+'_Kp_'+str(Con_K_p)+'.png'
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fig3.savefig(figname)
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