Georg_Brantegger/Python-DT_Slot_3
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small changes for consistency, comments and a small fix in the convergence method of the turbine

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Brantegger Georg
2022-08-08 14:49:22 +02:00
parent 5a790d5ca5
commit 38c809ef49
10 changed files with 496 additions and 304 deletions
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23
Regler/Regler_class_file.py
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@@ -1,6 +1,7 @@
import numpy as np
#based on https://en.wikipedia.org/wiki/PID_controller#Discrete_implementation
# performance parameters for controllers
def trap_int(vec,timestep):
# numerical integration via the trapeziod rule to calculate the performance parameters
l = np.size(vec)
@@ -41,6 +42,7 @@ def ITAE_fun(error_history,timestep):
itae = trap_int(np.abs(e),dt)
return itae
# P controller
class P_controller_class:
# def __init__(self,setpoint,proportionality_constant):
# self.SP = setpoint
@@ -72,14 +74,14 @@ class P_controller_class:
def __init__(self):
pass
# PI controller
class PI_controller_class:
# init
def __init__(self,setpoint,deadband,proportionality_constant,Ti,timestep,lower_limit=0.,upper_limit=1.):
self.SP = setpoint
self.db = deadband
self.Kp = proportionality_constant
self.Ti = Ti # integration time
self.Ti = Ti # ~integration time
self.dt = timestep
# use a list to be able to append more easily - will get converted to np.array when needed
self.error_history = [0]
@@ -88,15 +90,13 @@ class PI_controller_class:
self.cv_upper_limit = upper_limit # limits for the controll variable
# setter
def set_setpoint(self,setpoint):
self.SP = setpoint
def set_control_variable(self,control_variable, display_warning=True):
if display_warning == True:
print('WARNING! You are setting the control variable of the PI controller manually \
and are not using the .update_controll_variable() method')
print('WARNING! You are setting the control variable of the PI controller manually! \
Consider using the .update_controll_variable() method instead.')
self.control_variable = control_variable
# getter
@@ -167,15 +167,14 @@ class PI_controller_class:
# only if that is the case, change control variable
if abs(self.error) > self.db:
new_control = cv+Kp*(e0-e1)+dt/Ti*e0
# ensure that the controll variable stays within the predefined limits
if new_control < self.cv_lower_limit:
new_control = self.cv_lower_limit
if new_control > self.cv_upper_limit:
new_control = self.cv_upper_limit
else:
new_control = cv
# ensure that the controll variable stays within the predefined limits
if new_control < self.cv_lower_limit:
new_control = self.cv_lower_limit
if new_control > self.cv_upper_limit:
new_control = self.cv_upper_limit
# set the control variable attribute
self.set_control_variable(new_control,display_warning=False)