Micro-generation using LMS Imagine.Lab AMESim · Micro-generation using LMS Imagine.Lab AMESim ......
Transcript of Micro-generation using LMS Imagine.Lab AMESim · Micro-generation using LMS Imagine.Lab AMESim ......
Event title (to be altered on title master)Presenter name – presenter job title (to be altered on title master)
Micro-generation using LMS Imagine.Lab AMESim
– 2009/04/20
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Agenda
§ Home electric network components
§ Solar panels
§ Load profiles and system examples
§ Control aspects
§ Heat and co-generation
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The electric network
§Modeling the electric network with the electrical libraries:
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DC/DC converters
§ Simple ideal transformer:
§ Boost chopper:
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Inverters (DC/AC converters)
§ Example of an inverter model:
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Batteries
§ Batteries commonly used in PV systems:
- Lead-acid batteries
In AMESim, tables providing the open circuit voltage and the internal resistance depending on the SOC (State-Of-Charge)
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Agenda
§ Home electric network components
§ Solar panels
§ Load profiles and whole system examples
§ Control aspects
§ Heat and co-generation
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Solar panels
§ Equivalent electric circuit of a solar cell (PV):
- current source + diode, with 2 resistances (one in parallel, one in series)
- the current source is proportional to the sun irradiance received by the photovoltaic cell:
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Solar panels
§ Validation of the model with data from solar module makers
Example : BP Solar, SX170B
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Solar panels : how to maximize the output
§ Optimum angle of solar panels : perpendicular to sun direction
http://sunposition.info/sunposition/spc/locations.php#1
Mechanical solar trackers (one-axis or 2-axis) can be used to optimize the solar panel orientation towards the sun
§ Maximum Power Point Tracker: electric device which set the optimal voltage to get the maximum electric power from the solar panel
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Agenda
§ Home electric network components
§ Solar panels
§ Load profiles and system examples
§ Control aspects
§ Heat and co-generation
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Consumers: load profiles
§ Examples of household electric loads
(mean value on 90 houses in UK)
Electric power sink in AMESim
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Examples of systems
§ Example of simple grid-tied PV system in AMESim (electric network in equivalent DC):
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Examples of systems
§ Example of simple grid-tied PV system with battery in AMESim (electric network in equivalent DC):
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Agenda
§ Home electric network components
§ Solar panels
§ Load profiles and system examples
§ Control aspects
§ Heat and co-generation
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Extensions : several sources and consumers
Inverter
Tank
Natural gas
hot waterdemand
DC AC
heat
electricpower
city electric network
Solar energy
ENERGYSOURCES ENERGY
CONSUMERS
Aircon
light
bathroom
kitchen
electricappliances
ControlUnit
electricitydemand
Micro-CHP system(fuel-cell, gas engine,…)
Solar panels
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The Control Unit(s)
§ Using the Signal library in AMESim:
§ Using dedicated tools (Matlab/Simulink, Labview, Scilab,…) in co-simulation with AMESim:
AMESim - Simulink Interfaces Easy-to-use and efficient tool for coupling
AMESim plant model within Simulink control system model
AMESimMulti-domain systems
simulation platform
SimulinkThe de-facto standard for
control system design
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Agenda
§ Home electric network components
§ Solar panels
§ Load profiles and whole system examples
§ Control aspects
§ Heat and co-generation
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Fuel Cell modeling
§ Enefarm specifications:
- Electric output 1kW
- Heat 1.2 kW
§ Simple FC model in AMESim:
Parameters:
- Number of cells
- Cell area
Outputs:
- Electric power (current and voltage)
- Heat released
- Consumption of fuel
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Example of grid-FC-PV-battery system
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Basic FC cogeneration system
Fuel processing
system
Fuel Cell(PEMFC)
Inverter
Tank
Natural gas
electricity
hot water
DCAC
H2
heat
electricpower
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Basic FC cogeneration system
§ Basic house co-generation system, how it works :
1. The fuel processing system extracts hydrogen from gas (methane for example)
2. The Fuel Cell stack generates electricity from chemical reaction between hydrogen and oxygen
3. The inverter converts direct current into alternative current
4. The water tank is heated by the heat produced by the FC chemical reaction
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The Fuel Cell and Fuel Processing System
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The heat recovery and the tank
§ Several examples of thermal systems: tank model
Cooling System
Heat exchanges:Solid/solid (conduction)Solid/liquid (convection)Solid/gas (convection)
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Key benefits
§ LMS Imagine.Lab AMESim key benefits for co-generation modeling:
àMulti-domain:
Co-generation involves different physical domains: electric, thermal, fluids, chemical, mechanical…
AMESim, thanks to its fully compatible libraries based on physics, is perfectly adapted to the modeling of this kind of systems.
àFlexibility:
It is very easy in AMESim to change and adapt the models, to add some components, to create and customize its own models.
All kind of architectures can be represented and different strategies can be tested depending on the consumption, the environment,…
Event title (to be altered on title master)Presenter name – presenter job title (to be altered on title master)
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