Nueva tarifa de la luz. Powerwall: Es rentable instalar una bateria? en una instalación solar? Sin instalación Solar? Parte 2
Nueva tarifa de la luz. Powerwall: Es rentable instalar una batería? en una instalación solar? Sin instalación Solar? Parte 2
En el capítulo seguimos profundizando en la simulación de una batería en una instalación eléctrica. Además ahora lo hacemos para la nueva factura que entrará en vigor en breve y tanto para instalaciones solares con balance neto, como sin balance neto, como en instalaciones sin paneles solares.
A continuación el panel de Grafana Instalaciones Solares:
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"type": "time"
},
{
"params": [
"null"
],
"type": "fill"
}
],
"hide": false,
"measurement": "battery_iota_consumoCasa_bat10kwh",
"orderByTime": "ASC",
"policy": "default",
"refId": "C",
"resultFormat": "time_series",
"select": [
[
{
"params": [
"level_percentage"
],
"type": "field"
},
{
"params": [],
"type": "mean"
}
]
],
"tags": []
},
{
"alias": "discharge power",
"groupBy": [
{
"params": [
"$__interval"
],
"type": "time"
},
{
"params": [
"null"
],
"type": "fill"
}
],
"hide": false,
"measurement": "battery_iota_consumoCasa_bat10kwh",
"orderByTime": "ASC",
"policy": "default",
"refId": "D",
"resultFormat": "time_series",
"select": [
[
{
"params": [
"discharge_power"
],
"type": "field"
},
{
"params": [],
"type": "mean"
}
]
],
"tags": []
}
],
"thresholds": [],
"timeFrom": null,
"timeRegions": [],
"timeShift": null,
"title": "Panel Title",
"tooltip": {
"shared": true,
"sort": 0,
"value_type": "individual"
},
"type": "graph",
"xaxis": {
"buckets": null,
"mode": "time",
"name": null,
"show": true,
"values": []
},
"yaxes": [
{
"format": "short",
"label": null,
"logBase": 1,
"max": null,
"min": null,
"show": true
},
{
"format": "short",
"label": null,
"logBase": 1,
"max": "102",
"min": "0",
"show": true
}
],
"yaxis": {
"align": false,
"alignLevel": null
}
},
{
"datasource": "InfluxDB",
"fieldConfig": {
"defaults": {
"custom": {},
"mappings": [],
"thresholds": {
"mode": "absolute",
"steps": [
{
"color": "red",
"value": null
}
]
},
"unit": "watth"
},
"overrides": []
},
"gridPos": {
"h": 4,
"w": 9,
"x": 12,
"y": 0
},
"id": 8,
"options": {
"colorMode": "value",
"graphMode": "none",
"justifyMode": "auto",
"orientation": "auto",
"reduceOptions": {
"calcs": [
"mean"
],
"fields": "",
"values": false
},
"text": {},
"textMode": "auto"
},
"pluginVersion": "7.4.2",
"targets": [
{
"alias": "Imp VALLE",
"groupBy": [
{
"params": [
"$__interval"
],
"type": "time"
},
{
"params": [
"null"
],
"type": "fill"
}
],
"hide": false,
"measurement": "battery_NO_solar_bateria10kwh_llano50P",
"orderByTime": "ASC",
"policy": "default",
"query": "SELECT integral(\"net_usage_Valle\", 1h) FROM \"battery_iota_consumoCasa\" WHERE $timeFilter ",
"rawQuery": true,
"refId": "B",
"resultFormat": "time_series",
"select": [
[
{
"params": [
"value"
],
"type": "field"
},
{
"params": [],
"type": "mean"
}
]
],
"tags": []
},
{
"alias": "IMP LLANO",
"groupBy": [
{
"params": [
"$__interval"
],
"type": "time"
},
{
"params": [
"null"
],
"type": "fill"
}
],
"hide": false,
"measurement": "battery_solar_bateria10kwh",
"orderByTime": "ASC",
"policy": "default",
"query": "SELECT integral(\"net_usage_Llano\", 1h) FROM \"battery_iota_consumoCasa\" WHERE $timeFilter ",
"rawQuery": true,
"refId": "A",
"resultFormat": "time_series",
"select": [
[
{
"params": [
"net_usage_Llano"
],
"type": "field"
},
{
"params": [],
"type": "mean"
}
]
],
"tags": []
},
{
"alias": "Imp PUNTA",
"groupBy": [
{
"params": [
"$__interval"
],
"type": "time"
},
{
"params": [
"null"
],
"type": "fill"
}
],
"hide": false,
"measurement": "battery_NO_solar_bateria10kwh_llano50P",
"orderByTime": "ASC",
"policy": "default",
"query": "SELECT integral(\"net_usage_Punta\", 1h) FROM \"battery_iota_consumoCasa\" WHERE $timeFilter ",
"rawQuery": true,
"refId": "C",
"resultFormat": "time_series",
"select": [
[
{
"params": [
"value"
],
"type": "field"
},
{
"params": [],
"type": "mean"
}
]
],
"tags": []
}
],
"timeFrom": null,
"timeShift": null,
"title": "ORIGINAL IMPORTADA",
"type": "stat"
},
{
"datasource": "InfluxDB",
"fieldConfig": {
"defaults": {
"custom": {},
"mappings": [],
"thresholds": {
"mode": "absolute",
"steps": [
{
"color": "red",
"value": null
}
]
},
"unit": "watth"
},
"overrides": []
},
"gridPos": {
"h": 4,
"w": 9,
"x": 12,
"y": 4
},
"id": 9,
"options": {
"colorMode": "value",
"graphMode": "none",
"justifyMode": "auto",
"orientation": "auto",
"reduceOptions": {
"calcs": [
"mean"
],
"fields": "",
"values": false
},
"text": {},
"textMode": "auto"
},
"pluginVersion": "7.4.2",
"targets": [
{
"alias": "Imp VALLE",
"groupBy": [
{
"params": [
"$__interval"
],
"type": "time"
},
{
"params": [
"null"
],
"type": "fill"
}
],
"hide": false,
"measurement": "battery_NO_solar_bateria10kwh_llano50P",
"orderByTime": "ASC",
"policy": "default",
"query": "SELECT integral(\"net_usage_Valle\", 1h) FROM \"battery_iota_consumoCasa_bat10kwh\" WHERE $timeFilter ",
"rawQuery": true,
"refId": "B",
"resultFormat": "time_series",
"select": [
[
{
"params": [
"value"
],
"type": "field"
},
{
"params": [],
"type": "mean"
}
]
],
"tags": []
},
{
"alias": "IMP LLANO",
"groupBy": [
{
"params": [
"$__interval"
],
"type": "time"
},
{
"params": [
"null"
],
"type": "fill"
}
],
"hide": false,
"measurement": "battery_solar_bateria10kwh",
"orderByTime": "ASC",
"policy": "default",
"query": "SELECT integral(\"net_usage_Llano\", 1h) FROM \"battery_iota_consumoCasa_bat10kwh\" WHERE $timeFilter ",
"rawQuery": true,
"refId": "A",
"resultFormat": "time_series",
"select": [
[
{
"params": [
"net_usage_Llano"
],
"type": "field"
},
{
"params": [],
"type": "mean"
}
]
],
"tags": []
},
{
"alias": "Imp PUNTA",
"groupBy": [
{
"params": [
"$__interval"
],
"type": "time"
},
{
"params": [
"null"
],
"type": "fill"
}
],
"hide": false,
"measurement": "battery_NO_solar_bateria10kwh_llano50P",
"orderByTime": "ASC",
"policy": "default",
"query": "SELECT integral(\"net_usage_Punta\", 1h) FROM \"battery_iota_consumoCasa_bat10kwh\" WHERE $timeFilter ",
"rawQuery": true,
"refId": "C",
"resultFormat": "time_series",
"select": [
[
{
"params": [
"value"
],
"type": "field"
},
{
"params": [],
"type": "mean"
}
]
],
"tags": []
}
],
"timeFrom": null,
"timeShift": null,
"title": "BATTERY 10KWH IMPORTADA",
"type": "stat"
},
{
"datasource": "InfluxDB",
"fieldConfig": {
"defaults": {
"custom": {},
"mappings": [],
"thresholds": {
"mode": "absolute",
"steps": [
{
"color": "red",
"value": null
}
]
},
"unit": "watth"
},
"overrides": []
},
"gridPos": {
"h": 4,
"w": 9,
"x": 12,
"y": 8
},
"id": 10,
"options": {
"colorMode": "value",
"graphMode": "none",
"justifyMode": "auto",
"orientation": "auto",
"reduceOptions": {
"calcs": [
"mean"
],
"fields": "",
"values": false
},
"text": {},
"textMode": "auto"
},
"pluginVersion": "7.4.2",
"targets": [
{
"alias": "Imp VALLE",
"groupBy": [
{
"params": [
"$__interval"
],
"type": "time"
},
{
"params": [
"null"
],
"type": "fill"
}
],
"hide": false,
"measurement": "battery_NO_solar_bateria10kwh_llano50P",
"orderByTime": "ASC",
"policy": "default",
"query": "SELECT integral(\"net_usage_Valle\", 1h) FROM \"battery_iota_consumoCasa_bat10kwh_50_llano\" WHERE $timeFilter ",
"rawQuery": true,
"refId": "B",
"resultFormat": "time_series",
"select": [
[
{
"params": [
"value"
],
"type": "field"
},
{
"params": [],
"type": "mean"
}
]
],
"tags": []
},
{
"alias": "IMP LLANO",
"groupBy": [
{
"params": [
"$__interval"
],
"type": "time"
},
{
"params": [
"null"
],
"type": "fill"
}
],
"hide": false,
"measurement": "battery_solar_bateria10kwh",
"orderByTime": "ASC",
"policy": "default",
"query": "SELECT integral(\"net_usage_Llano\", 1h) FROM \"battery_iota_consumoCasa_bat10kwh_50_llano\" WHERE $timeFilter ",
"rawQuery": true,
"refId": "A",
"resultFormat": "time_series",
"select": [
[
{
"params": [
"net_usage_Llano"
],
"type": "field"
},
{
"params": [],
"type": "mean"
}
]
],
"tags": []
},
{
"alias": "Imp PUNTA",
"groupBy": [
{
"params": [
"$__interval"
],
"type": "time"
},
{
"params": [
"null"
],
"type": "fill"
}
],
"hide": false,
"measurement": "battery_NO_solar_bateria10kwh_llano50P",
"orderByTime": "ASC",
"policy": "default",
"query": "SELECT integral(\"net_usage_Punta\", 1h) FROM \"battery_iota_consumoCasa_bat10kwh_50_llano\" WHERE $timeFilter ",
"rawQuery": true,
"refId": "C",
"resultFormat": "time_series",
"select": [
[
{
"params": [
"value"
],
"type": "field"
},
{
"params": [],
"type": "mean"
}
]
],
"tags": []
},
{
"groupBy": [
{
"params": [
"$__interval"
],
"type": "time"
},
{
"params": [
"null"
],
"type": "fill"
}
],
"hide": false,
"measurement": "batt",
"orderByTime": "ASC",
"policy": "default",
"refId": "D",
"resultFormat": "time_series",
"select": [
[
{
"params": [
"value"
],
"type": "field"
},
{
"params": [],
"type": "mean"
}
]
],
"tags": []
}
],
"timeFrom": null,
"timeShift": null,
"title": "BATTERY 10KWH IMPORTADA 80% en LLANO",
"type": "stat"
}
],
"refresh": false,
"schemaVersion": 27,
"style": "dark",
"tags": [],
"templating": {
"list": []
},
"time": {
"from": "2020-07-27T22:00:00.000Z",
"to": "2020-07-30T21:59:59.000Z"
},
"timepicker": {},
"timezone": "",
"title": "Rentabilidad Bateria SIN PANEL",
"uid": "V2iNr2-Gzwww",
"version": 4
}
y el script python ‘simula_bateria.py’:
#!/usr/bin/env python3
# by Luis Gonzalez https://domotica.solar
from influxdb import InfluxDBClient
import datetime
import time
import re
import pytz
import aux_functions
#CONFIGURE DATABASE ACCESS
influx_client = InfluxDBClient('influxdb.local', 8086, 'USUARIO', 'PASSWORD', 'casaluis')
def main():
#in UTC=0
starttime = '2020-01-01 00:00:00'
endtime = '2020-12-31 23:59:59'
##baterry configuration
battery = {
"level": 0,
"level_percentage": 0,
"net_usage": 0,
"net_delivery": 0,
"min": 0,#MINIMO
"max": 0, #CAPACIDAD WATTS
"label": "_iota_lineaDistribuidora",
"efficiency": 0.9,
"power_sample_rate": 3600, #power samples per hour
"influx_meassurement": "iota_lineaDistribuidora",
"max_distributor_power": 4000, # distributor power_line maximun power
"max_charge_power": 4000, # battery max charge rate
"max_discharge_power": 4000, # battery max discharge rate
}
cache_size=10000;
# mode=>
# 0 auto,
# 1 charge
periods = [
{
"start": 0,
"end": 6,
"mode": 1,
"limit": 100, # battery percentage modes 1 and 2
"label":"Valle"
},
{
"start": 6,
"end": 8,
"mode": 0,
"limit": 0,
"label":"Llano"
},
{
"start": 8,
"end": 12,
"mode": 0,
"limit": 0,
"label":"Punta"
},
{
"start": 12,
"end": 16,
"mode": 0,
"limit": 0,
"label":"Llano"
},
{
"start": 16,
"end": 20,
"mode": 0,
"limit": 0,
"label":"Punta"
},
{
"start": 20,
"end": 22,
"mode": 0,
"limit": 0,
"label":"Llano"
},
{
"start": 22,
"end": 24,
"mode": 1,
"limit": 100, # battery percentage modes 1 and 2
"label":"Valle"
},
]
aux_functions.general(battery,influx_client,periods,starttime,endtime,cache_size)
#print(tramo)
if __name__ == "__main__":
main()
El script de Python 'aux_functions.py':
#!/usr/bin/env python3
# by Luis Gonzalez https://domotica.solar
import re
import datetime
import time
def influx(measurements):
try:
influx_client.write_points(measurements)
except Exception as e:
print('Failed to write to influxdb: ', e)
def charge_battery(battery, power_line, upto,from_net):
#upto battery percentage upper limit, #from_net charge from net
if(battery['max']==0):
if(power_line<0):
battery['net_usage'] = 0
battery['net_delivery'] = -power_line
else:
battery['net_usage'] = power_line
battery['net_delivery'] = 0
battery['level']=0
battery['charge_power']=0
battery['discharge_power']=0
battery['net'] = power_line
else:
if(from_net==1):
max_watt_avail=battery['max_distributor_power']-power_line
elif(power_line<0):
max_watt_avail=-1*power_line
else:
max_watt_avail=0
if(battery['max_charge_power'] (battery['max']*upto/100)):
#not enough space on battery, delivering to net
battery['charge_power'] = 0
power_line=new_power_line+exc_power_line
if(power_line<0):
battery['net_usage'] = 0
battery['net_delivery'] = power_line
else:
battery['net_usage'] = power_line
battery['net_delivery'] = 0
battery['net'] = power_line
battery['charge_power']=0
else:
#enough space on battery, charging battery
battery['level'] = battery['level'] + new_power_line / battery['power_sample_rate']
battery['charge_power'] = new_power_line
if(power_line+new_power_line<0):
# too much panel energy
battery['net_usage'] = 0
battery['net_delivery'] = (power_line+new_power_line)*-1
battery['net'] = power_line+new_power_line
else:
battery['net_usage'] = power_line+new_power_line
battery['net_delivery'] = 0
battery['net'] = power_line+new_power_line
battery['discharge_power']=0
def discharge_battery(battery, power_line, upto):
exc_power_line=0
if(battery['max_discharge_power'] 0:
discharge_battery(battery, power_line, 0)
else:
#reverse power_line
charge_battery(battery, power_line, 100,0)
elif (mode==1):
charge_battery(battery, power_line, upto,1)
elif (mode==2):
# discharge mode
if power_line > 0:
discharge_battery(battery, power_line, upto)
else:
#reverse power_line
charge_battery(battery, power_line, 100,0)
if (battery['max']==0):
battery['level_percentage']=0
else:
battery['level_percentage']=battery['level']/battery['max']*100
return battery
def general(battery,influx_client,periods,starttime,endtime,cache_size):
measurements = []
#delete serie if exists
result = influx_client.query('delete from "battery' + battery['label'] + '"')
query = "select * from " + battery['influx_meassurement'] + " where time >= '" + format(starttime) + "' and time < '" + format(endtime) + "' order by time;";
print(query)
result = influx_client.query(query)
points = result.get_points()
points2 = result.get_points() #aux function calculate percentage done
points_size=len(list(points2))
#obtain diferents labels from periods
j=0
different_periods=[]
while j=periods[j]['start'] and fecha.hour=periods[j]['start'] or fecha.hour" + format(point['time']) + " " + format(point['value']) + "W Period=" + format(period) + " Percentage=" + '%'.format(jobdone))
i=0
measurements.append()
if len(measurements) > cache_size:
influx_client.write_points(measurements)
print(".")
measurements = []
influx_client.write_points(measurements)
y por último los dos ficheros excel:
Aquí tenéis la lista de los componentes necesarios para montar tu propia instalación:
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