LibreSolar System Simulation

Modelling and simulation of LibreSolar components and needed external components like solarpanels and battery cells to analyse the behaviour of the system

System overview

Environment Generator:

function: Generates system parameter which influence the LibreSolar Box Components out of given values from the location profile

• Location Profile (city/geo_position, season, daytime)
• irradience [W/m^2], temperature [celsius]

Solar:

• irradience [W/m^2]
• temperature [celsius]
• type (type [mono/poly/...], surface [m^2], nominal_values (Wp, V, I))
• --> alternative: data_sheet parameter -> nominal_values
• voltage[V], current [I]

Battery:

• type (...), nominal_values (capacity [Ah], voltage [V]), security_values/MinMax Value (...)
• Box Temp.
• voltage[V], current [I]
• SOC, SOH
• temperature [celsius]

Loads:

• time_using [h]
• voltage [V], current [I]
• //open question: does the Load System effects with V or I the Libre Solar System

LibreSolar (electronics):

• solar_voltage [V], solar_current [I]
• output - voltage[V], current[I],
• Box Temp. [celsius]
• comm_data (modi (used panels+batteries, system parameter settings -> needed voltage, power, energy)))

Control Model

Communication Interface/ Stack:

HW: circuit for signal voltage level to Communication Parameters from Higher Control Level -> Server (-> Selfmanaged) -> mobile Application -> Grid Application

Signal Generator:

• MPPT Charger algorithm
• BMS algorithm

Systemmodel/Power Circuit:

• Power component -> Interface between µC and Energy HW (Solar, Batteries) -> Output1
• measurement component (scaled U, I) -> Output2

Event Generator:

• system states and discrete Events

Hardware Model