647 lines
18 KiB
Python
647 lines
18 KiB
Python
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#!/usr/bin/python -u
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# coding=utf-8
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import logging
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import os
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import time
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import states as State
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import target_type as TargetType
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from random import randint
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from python_libs.ie_dbus.dbus_service import DBusService
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from python_libs.ie_utils.main_loop import run_on_main_loop
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# noinspection PyUnreachableCode
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if False:
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from typing import NoReturn, Optional, Any, Iterable, List
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logging.basicConfig(level=logging.INFO)
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_log = logging.getLogger(__name__)
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VERSION = '1.0.0'
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PRODUCT = 'Controller'
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GRID_SERVICE_PREFIX = 'com.victronenergy.grid.'
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BATTERY_SERVICE_PREFIX = 'com.victronenergy.battery.'
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INVERTER_SERVICE_PREFIX = 'com.victronenergy.vebus.'
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SYSTEM_SERVICE_PREFIX = 'com.victronenergy.system'
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HUB4_SERVICE_PREFIX = 'com.victronenergy.hub4'
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SETTINGS_SERVICE_PREFIX = 'com.victronenergy.settings'
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UPDATE_PERIOD_MS = 2000
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MAX_POWER_PER_BATTERY = 2500
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MAX_DAYS_WITHOUT_EOC = 7
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SECONDS_PER_DAY = 24 * 60 * 60
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GRID_SET_POINT_SETTING = PRODUCT + '/GridSetPoint'
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LAST_EOC_SETTING = PRODUCT + '/LastEOC'
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CALIBRATION_CHARGE_START_TIME_OF_DAY_SETTING = PRODUCT + '/CalibrationChargeStartTime'
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HEAT_LOSS = 150 # W
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P_CONST = 0.5 # W/W
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Epoch = int
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Seconds = int
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def time_now():
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return int(time.time())
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class Controller(object):
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def __init__(self, measurement, target, target_type, state):
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# type: (float, float, int, int) -> NoReturn
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self.target_type = target_type
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self.target = target
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self.measurement = measurement
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self.state = state
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d_p = target - measurement
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self.delta = d_p * P_CONST
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@staticmethod
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def min(controllers):
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# type: (Iterable[Controller]) -> Controller
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return min(controllers, key=lambda c: c.delta)
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@staticmethod
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def max(controllers):
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# type: (Iterable[Controller]) -> Controller
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return max(controllers, key=lambda c: c.delta)
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def clamp(self, lower_limit_controllers, upper_limit_controllers):
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# type: (List[Controller],List[Controller]) -> Controller
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c_min = Controller.min(upper_limit_controllers + [self])
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return Controller.max(lower_limit_controllers + [c_min])
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# noinspection PyMethodMayBeStatic
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class InnovEnergyController(DBusService):
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def __init__(self):
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super(InnovEnergyController, self).__init__(PRODUCT.lower())
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self.settings.add_setting(path=LAST_EOC_SETTING, default_value=0) # unix epoch timestamp
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self.settings.add_setting(path=GRID_SET_POINT_SETTING, default_value=0) # grid setpoint, Watts
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self.settings.add_setting(path=CALIBRATION_CHARGE_START_TIME_OF_DAY_SETTING, default_value=32400) # 09:00
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self.own_properties.set('/ProductName', PRODUCT)
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self.own_properties.set('/Mgmt/ProcessName', __file__)
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self.own_properties.set('/Mgmt/ProcessVersion', VERSION)
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self.own_properties.set('/Mgmt/Connection', 'dbus')
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self.own_properties.set('/ProductId', PRODUCT)
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self.own_properties.set('/FirmwareVersion', VERSION)
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self.own_properties.set('/HardwareVersion', VERSION)
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self.own_properties.set('/Connected', 1)
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self.own_properties.set('/TimeToCalibrationCharge', 'unknown')
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self.own_properties.set('/State', 0)
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self.phases = [
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p for p in ['/Hub4/L1/AcPowerSetpoint', '/Hub4/L2/AcPowerSetpoint', '/Hub4/L3/AcPowerSetpoint']
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if self.remote_properties.exists(self.inverter_service + p)
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]
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self.n_phases = len(self.phases)
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print ('The system has ' + str(self.n_phases) + ' phase' + ('s' if self.n_phases != 1 else ''))
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self.max_inverter_power = 32700
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# ^ defined in https://github.com/victronenergy/dbus_modbustcp/blob/master/CCGX-Modbus-TCP-register-list.xlsx
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def clamp_power_command(self, value):
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# type: (float) -> int
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value = max(value, -self.max_inverter_power)
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value = min(value, self.max_inverter_power)
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return int(value)
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def get_service(self, prefix):
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# type: (str) -> Optional[unicode]
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service = next((s for s in self.available_services if s.startswith(prefix)), None)
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if service is None:
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raise Exception('no service matching ' + prefix + '* available')
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return service
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def is_service_available(self, prefix):
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# type: (str) -> bool
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return next((True for s in self.available_services if s.startswith(prefix)), False)
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@property
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def battery_service(self):
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# type: () -> Optional[unicode]
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return self.get_service(BATTERY_SERVICE_PREFIX)
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@property
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def battery_available(self):
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# type: () -> bool
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return self.is_service_available(BATTERY_SERVICE_PREFIX)
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@property
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def grid_service(self):
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# type: () -> Optional[unicode]
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return self.get_service(GRID_SERVICE_PREFIX)
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@property
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def grid_meter_available(self):
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# type: () -> bool
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return self.is_service_available(GRID_SERVICE_PREFIX)
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@property
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def inverter_service(self):
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# type: () -> Optional[unicode]
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return self.get_service(INVERTER_SERVICE_PREFIX)
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@property
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def inverter_available(self):
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# type: () -> bool
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return self.is_service_available(INVERTER_SERVICE_PREFIX)
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@property
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def system_service(self):
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# type: () -> Optional[unicode]
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return self.get_service(SYSTEM_SERVICE_PREFIX)
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@property
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def system_service_available(self):
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# type: () -> bool
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return self.is_service_available(SYSTEM_SERVICE_PREFIX)
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@property
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def hub4_service(self):
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# type: () -> Optional[unicode]
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return self.get_service(HUB4_SERVICE_PREFIX)
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@property
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def hub4_service_available(self):
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# type: () -> bool
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return self.is_service_available(HUB4_SERVICE_PREFIX)
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@property
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def inverter_power_setpoint(self):
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# type: () -> float
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return sum((self.get_inverter_prop(p) for p in self.phases))
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def get_battery_prop(self, dbus_path):
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# type: (str) -> Any
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battery_service = self.battery_service
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return self.remote_properties.get(battery_service + dbus_path).value
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def get_grid_prop(self, dbus_path):
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# type: (str) -> Any
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return self.remote_properties.get(self.grid_service + dbus_path).value
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def get_inverter_prop(self, dbus_path):
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# type: (str) -> Any
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return self.remote_properties.get(self.inverter_service + dbus_path).value
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def get_system_prop(self, dbus_path):
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# type: (str) -> Any
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system_service = self.system_service
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return self.remote_properties.get(system_service + dbus_path).value
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def get_hub4_prop(self, dbus_path):
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# type: (str) -> Any
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hub4_service = self.hub4_service
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return self.remote_properties.get(hub4_service + dbus_path).value
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def set_settings_prop(self, dbus_path, value):
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# type: (str, Any) -> bool
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return self.remote_properties.set(SETTINGS_SERVICE_PREFIX + dbus_path, value)
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def set_inverter_prop(self, dbus_path, value):
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# type: (str, Any) -> bool
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inverter_service = self.inverter_service
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return self.remote_properties.set(inverter_service + dbus_path, value)
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@property
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def max_battery_charge_power(self):
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# type: () -> int
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return self.get_battery_prop('/Info/MaxChargePower')
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@property
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def max_battery_discharge_power(self):
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# type: () -> int
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return self.get_battery_prop('/Info/MaxDischargePower')
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@property
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def max_configured_charge_power(self):
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# type: () -> Optional[int]
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max_power = self.settings.get('/Settings/CGwacs/MaxChargePower')
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return max_power if max_power >= 0 else None
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@property
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def max_configured_discharge_power(self): # unsigned
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# type: () -> Optional[int]
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max_power = self.settings.get('/Settings/CGwacs/MaxDischargePower')
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return max_power if max_power >= 0 else None
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@property
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def max_charge_power(self):
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# type: () -> int
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if self.max_configured_charge_power is None:
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return self.max_battery_charge_power
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else:
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return min(self.max_battery_charge_power, self.max_configured_charge_power)
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@property
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def max_discharge_power(self): # unsigned
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# type: () -> int
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if self.max_configured_discharge_power is None:
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return self.max_battery_discharge_power
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else:
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return min(self.max_battery_discharge_power, self.max_configured_discharge_power)
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def set_inverter_power_setpoint(self, power,controller_state):
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# type: (float,int) -> NoReturn
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if self.settings.get('/Settings/CGwacs/BatteryLife/State') == 9:
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self.settings.set('/Settings/CGwacs/BatteryLife/State', 0) # enables scheduled charge
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self.settings.set('/Settings/CGwacs/Hub4Mode', 3) # disable hub4
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# off-grid installation has no /Hub4 path, thus the setting here will fail and self.n_phases = 0
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if controller_state != 6 and controller_state != 0:
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self.set_inverter_prop('/Hub4/DisableCharge', 0)
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self.set_inverter_prop('/Hub4/DisableFeedIn', 0)
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power = self.clamp_power_command(power / self.n_phases)
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for p in self.phases:
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self.set_inverter_prop(p, power + randint(-1, 1)) # use randint to force dbus re-send
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def set_controller_state(self, state):
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# type: (int) -> NoReturn
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self.own_properties.set('/State', state)
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@property
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def grid_power(self):
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# type: () -> Optional[float]
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try:
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return self.get_grid_prop('/Ac/Power')
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except:
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return None
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@property
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def battery_cold(self):
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# type: () -> bool
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return self.get_battery_prop('/IoStatus/BatteryCold') == 1
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@property
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def eoc_reached(self):
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# type: () -> bool
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if not self.battery_available:
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return False
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return self.get_battery_prop('/IoStatus/EocReached') == 1
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@property
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def battery_power(self):
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# type: () -> float
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return self.get_battery_prop('/Dc/0/Power')
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@property
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def inverter_ac_in_power(self):
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# type: () -> float
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return self.get_inverter_prop('/Ac/ActiveIn/P')
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@property
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def inverter_ac_out_power(self):
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# type: () -> float
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return self.get_inverter_prop('/Ac/Out/P')
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@property
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def soc(self):
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# type: () -> float
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return self.get_battery_prop('/Soc')
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@property
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def n_batteries(self):
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# type: () -> int
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return self.get_battery_prop('/NbOfBatteries')
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@property
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def min_soc(self):
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# type: () -> float
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return self.settings.get('/Settings/CGwacs/BatteryLife/MinimumSocLimit')
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@property
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def should_hold_min_soc(self):
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# type: () -> bool
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return self.min_soc <= self.soc <= self.min_soc + 5
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@property
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def utc_offset(self):
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# type: () -> int
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# stackoverflow.com/a/1301528
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# stackoverflow.com/a/3168394
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os.environ['TZ'] = self.settings.get('/Settings/System/TimeZone')
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time.tzset()
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is_dst = time.daylight and time.localtime().tm_isdst > 0
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return -(time.altzone if is_dst else time.timezone)
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@property
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def grid_set_point(self):
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# type: () -> float
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return self.settings.get('/Settings/CGwacs/AcPowerSetPoint')
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@property
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def time_to_calibration_charge_str(self):
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# type: () -> str
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return self.own_properties.get('/TimeToCalibrationCharge').text
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@property
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def calibration_charge_deadline(self):
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# type: () -> Epoch
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utc_offset = self.utc_offset
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ultimate_deadline = self.settings.get(LAST_EOC_SETTING) + MAX_DAYS_WITHOUT_EOC * SECONDS_PER_DAY
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midnight_before_udl = int((ultimate_deadline + utc_offset) / SECONDS_PER_DAY) * SECONDS_PER_DAY - utc_offset # round off to last midnight
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dead_line = midnight_before_udl + self.calibration_charge_start_time_of_day
|
||
|
|
|
||
|
|
while dead_line > ultimate_deadline: # should fire at most once, but let's be defensive...
|
||
|
|
dead_line -= SECONDS_PER_DAY # too late, advance one day
|
||
|
|
|
||
|
|
return dead_line
|
||
|
|
|
||
|
|
@property
|
||
|
|
def time_to_calibration_charge(self):
|
||
|
|
# type: () -> Seconds
|
||
|
|
return self.calibration_charge_deadline - time_now()
|
||
|
|
|
||
|
|
@property
|
||
|
|
def grid_blackout(self):
|
||
|
|
# type: () -> bool
|
||
|
|
return self.get_inverter_prop('/Leds/Mains') < 1
|
||
|
|
|
||
|
|
@property
|
||
|
|
def scheduled_charge(self):
|
||
|
|
# type: () -> bool
|
||
|
|
return self.get_hub4_prop('/Overrides/ForceCharge') != 0
|
||
|
|
|
||
|
|
@property
|
||
|
|
def calibration_charge_start_time_of_day(self):
|
||
|
|
# type: () -> Seconds
|
||
|
|
return self.settings.get(CALIBRATION_CHARGE_START_TIME_OF_DAY_SETTING) # seconds since midnight
|
||
|
|
|
||
|
|
@property
|
||
|
|
def must_do_calibration_charge(self):
|
||
|
|
# type: () -> bool
|
||
|
|
return self.time_to_calibration_charge <= 0
|
||
|
|
|
||
|
|
def controller_charge_to_min_soc(self):
|
||
|
|
# type: () -> Controller
|
||
|
|
|
||
|
|
return Controller(
|
||
|
|
measurement=self.battery_power,
|
||
|
|
target=self.max_charge_power,
|
||
|
|
target_type=TargetType.BATTERY_DC,
|
||
|
|
state=State.CHARGE_TO_MIN_SOC
|
||
|
|
)
|
||
|
|
|
||
|
|
def controller_hold_min_soc(self):
|
||
|
|
# type: () -> Controller
|
||
|
|
|
||
|
|
# TODO: explain
|
||
|
|
|
||
|
|
a = -4 * HEAT_LOSS * self.n_batteries
|
||
|
|
b = -a * (self.min_soc + .5)
|
||
|
|
|
||
|
|
target_dc_power = a * self.soc + b
|
||
|
|
|
||
|
|
return Controller(
|
||
|
|
measurement = self.battery_power,
|
||
|
|
target = target_dc_power,
|
||
|
|
target_type = TargetType.BATTERY_DC,
|
||
|
|
state = State.HOLD_MIN_SOC
|
||
|
|
)
|
||
|
|
|
||
|
|
def controller_calibration_charge(self):
|
||
|
|
# type: () -> Controller
|
||
|
|
|
||
|
|
return Controller(
|
||
|
|
measurement = self.battery_power,
|
||
|
|
target = self.max_charge_power,
|
||
|
|
target_type = TargetType.BATTERY_DC,
|
||
|
|
state = State.CALIBRATION_CHARGE
|
||
|
|
)
|
||
|
|
|
||
|
|
def controller_limit_discharge_power(self): # signed
|
||
|
|
# type: () -> Controller
|
||
|
|
|
||
|
|
return Controller(
|
||
|
|
measurement = self.battery_power,
|
||
|
|
target = -self.max_discharge_power, # add sign!
|
||
|
|
target_type = TargetType.BATTERY_DC,
|
||
|
|
state = State.LIMIT_DISCHARGE_POWER
|
||
|
|
)
|
||
|
|
|
||
|
|
def controller_limit_charge_power(self):
|
||
|
|
# type: () -> Controller
|
||
|
|
return Controller(
|
||
|
|
measurement = self.battery_power,
|
||
|
|
target = self.max_charge_power,
|
||
|
|
target_type = TargetType.BATTERY_DC,
|
||
|
|
state = State.LIMIT_CHARGE_POWER
|
||
|
|
)
|
||
|
|
|
||
|
|
def controller_optimize_self_consumption(self):
|
||
|
|
# type: () -> Controller
|
||
|
|
|
||
|
|
return Controller(
|
||
|
|
measurement = self.grid_power,
|
||
|
|
target = self.grid_set_point,
|
||
|
|
target_type = TargetType.GRID_AC,
|
||
|
|
state = State.OPTIMIZE_SELF_CONSUMPTION
|
||
|
|
)
|
||
|
|
|
||
|
|
def controller_heating(self):
|
||
|
|
# type: () -> Controller
|
||
|
|
|
||
|
|
return Controller(
|
||
|
|
measurement = self.battery_power,
|
||
|
|
target = self.max_charge_power,
|
||
|
|
target_type = TargetType.BATTERY_DC,
|
||
|
|
state = State.HEATING
|
||
|
|
)
|
||
|
|
|
||
|
|
def controller_scheduled_charge(self):
|
||
|
|
# type: () -> Controller
|
||
|
|
|
||
|
|
return Controller(
|
||
|
|
measurement = self.battery_power,
|
||
|
|
target = self.max_charge_power,
|
||
|
|
target_type = TargetType.BATTERY_DC,
|
||
|
|
state = State.SCHEDULED_CHARGE
|
||
|
|
)
|
||
|
|
|
||
|
|
def controller_no_grid_meter(self):
|
||
|
|
# type: () -> Controller
|
||
|
|
|
||
|
|
return Controller(
|
||
|
|
measurement = self.battery_power,
|
||
|
|
target = self.max_charge_power,
|
||
|
|
target_type = TargetType.BATTERY_DC,
|
||
|
|
state = State.NO_GRID_METER_AVAILABLE
|
||
|
|
)
|
||
|
|
|
||
|
|
def controller_no_battery(self):
|
||
|
|
# type: () -> Controller
|
||
|
|
|
||
|
|
return Controller(
|
||
|
|
measurement = self.inverter_ac_in_power,
|
||
|
|
target = 0,
|
||
|
|
target_type = TargetType.INVERTER_AC_IN,
|
||
|
|
state = State.NO_BATTERY_AVAILABLE
|
||
|
|
)
|
||
|
|
|
||
|
|
def controller_bridge_grid_blackout(self):
|
||
|
|
# type: () -> Controller
|
||
|
|
|
||
|
|
return Controller(
|
||
|
|
measurement = 0,
|
||
|
|
target = 0,
|
||
|
|
target_type = TargetType.GRID_AC,
|
||
|
|
state = State.BRIDGE_GRID_BLACKOUT
|
||
|
|
)
|
||
|
|
|
||
|
|
def update_eoc(self):
|
||
|
|
|
||
|
|
if self.eoc_reached:
|
||
|
|
print('battery has reached EOC')
|
||
|
|
self.settings.set(LAST_EOC_SETTING, time_now())
|
||
|
|
|
||
|
|
self.publish_time_to_calibration_charge()
|
||
|
|
|
||
|
|
def publish_time_to_calibration_charge(self):
|
||
|
|
|
||
|
|
total_seconds = self.time_to_calibration_charge
|
||
|
|
|
||
|
|
if total_seconds <= 0:
|
||
|
|
time_to_eoc_str = 'now'
|
||
|
|
else:
|
||
|
|
total_minutes, seconds = divmod(total_seconds, 60)
|
||
|
|
total_hours, minutes = divmod(total_minutes, 60)
|
||
|
|
total_days, hours = divmod(total_hours, 24)
|
||
|
|
|
||
|
|
days_str = (str(total_days) + 'd') if total_days > 0 else ''
|
||
|
|
hours_str = (str(hours) + 'h') if total_hours > 0 else ''
|
||
|
|
minutes_str = (str(minutes) + 'm') if total_days == 0 else ''
|
||
|
|
|
||
|
|
time_to_eoc_str = "{0} {1} {2}".format(days_str, hours_str, minutes_str).strip()
|
||
|
|
|
||
|
|
self.own_properties.set('/TimeToCalibrationCharge', time_to_eoc_str)
|
||
|
|
|
||
|
|
def print_system_stats(self, controller):
|
||
|
|
# type: (Controller) -> NoReturn
|
||
|
|
|
||
|
|
def soc_setpoint():
|
||
|
|
if controller.state == State.CALIBRATION_CHARGE or controller.state == State.NO_GRID_METER_AVAILABLE:
|
||
|
|
return ' => 100%'
|
||
|
|
if controller.state == State.CHARGE_TO_MIN_SOC:
|
||
|
|
return ' => ' + str(int(self.min_soc)) + '%'
|
||
|
|
return ''
|
||
|
|
|
||
|
|
def setpoint(target_type):
|
||
|
|
if target_type != controller.target_type:
|
||
|
|
return ''
|
||
|
|
return ' => ' + str(int(controller.target)) + 'W'
|
||
|
|
|
||
|
|
def p(power):
|
||
|
|
# type: (Optional[float]) -> str
|
||
|
|
if power is None:
|
||
|
|
return ' --- W'
|
||
|
|
else:
|
||
|
|
return str(int(power)) + 'W'
|
||
|
|
|
||
|
|
ac_loads = None if self.grid_power is None else self.grid_power - self.inverter_ac_in_power
|
||
|
|
delta = p(controller.delta) if controller.delta < 0 else '+' + p(controller.delta)
|
||
|
|
battery_power = self.battery_power if self.battery_available else None
|
||
|
|
soc_ = str(self.soc) + '%' if self.battery_available else '---'
|
||
|
|
|
||
|
|
print (State.name_of[controller.state])
|
||
|
|
print ('')
|
||
|
|
print ('time to CC: ' + self.time_to_calibration_charge_str)
|
||
|
|
print (' SOC: ' + soc_ + soc_setpoint())
|
||
|
|
print (' grid: ' + p(self.grid_power) + setpoint(TargetType.GRID_AC))
|
||
|
|
print (' battery: ' + p(battery_power) + setpoint(TargetType.BATTERY_DC))
|
||
|
|
print (' AC in: ' + p(self.inverter_ac_in_power) + ' ' + delta)
|
||
|
|
print (' AC out: ' + p(self.inverter_ac_out_power))
|
||
|
|
print (' AC loads: ' + p(ac_loads))
|
||
|
|
|
||
|
|
def choose_controller(self):
|
||
|
|
# type: () -> Controller
|
||
|
|
|
||
|
|
if self.grid_blackout:
|
||
|
|
return self.controller_bridge_grid_blackout()
|
||
|
|
|
||
|
|
if not self.battery_available:
|
||
|
|
return self.controller_no_battery()
|
||
|
|
|
||
|
|
if self.battery_cold:
|
||
|
|
return self.controller_heating()
|
||
|
|
|
||
|
|
if self.scheduled_charge:
|
||
|
|
return self.controller_scheduled_charge()
|
||
|
|
|
||
|
|
if self.must_do_calibration_charge:
|
||
|
|
return self.controller_calibration_charge()
|
||
|
|
|
||
|
|
if self.soc < self.min_soc:
|
||
|
|
return self.controller_charge_to_min_soc()
|
||
|
|
|
||
|
|
if not self.grid_meter_available:
|
||
|
|
return self.controller_no_grid_meter()
|
||
|
|
|
||
|
|
hold_min_soc = self.controller_hold_min_soc()
|
||
|
|
limit_discharge_power = self.controller_limit_discharge_power() # signed
|
||
|
|
|
||
|
|
lower_limit = [limit_discharge_power, hold_min_soc]
|
||
|
|
|
||
|
|
# No upper limit. We no longer actively limit charge power. DC/DC Charger inside the BMS will do that for us.
|
||
|
|
upper_limit = []
|
||
|
|
|
||
|
|
optimize_self_consumption = self.controller_optimize_self_consumption()
|
||
|
|
|
||
|
|
return optimize_self_consumption.clamp(lower_limit, upper_limit)
|
||
|
|
|
||
|
|
def update(self):
|
||
|
|
|
||
|
|
print('iteration started\n')
|
||
|
|
|
||
|
|
self.update_eoc()
|
||
|
|
|
||
|
|
if self.inverter_available:
|
||
|
|
|
||
|
|
controller = self.choose_controller()
|
||
|
|
power = self.inverter_ac_in_power + controller.delta
|
||
|
|
|
||
|
|
self.print_system_stats(controller) # for debug
|
||
|
|
self.set_controller_state(controller.state)
|
||
|
|
self.set_inverter_power_setpoint(power,controller.state)
|
||
|
|
|
||
|
|
else:
|
||
|
|
self.set_controller_state(State.NO_INVERTER_AVAILABLE)
|
||
|
|
print('inverter not available!')
|
||
|
|
|
||
|
|
print('\niteration finished\n')
|
||
|
|
|
||
|
|
|
||
|
|
def main():
|
||
|
|
|
||
|
|
print('starting ' + __file__)
|
||
|
|
|
||
|
|
with InnovEnergyController() as service:
|
||
|
|
run_on_main_loop(service.update, UPDATE_PERIOD_MS)
|
||
|
|
|
||
|
|
print(__file__ + ' has shut down')
|
||
|
|
|
||
|
|
|
||
|
|
if __name__ == '__main__':
|
||
|
|
main()
|