IREN2
  • Backup Generator

    Backup Generator

    Traditionally, power grids are supplied almost exclusively by rotating generators. Discontinuation of large power plants in the future decreases rotating mass in the grid - leading to less system stability. The back-up generator operation is able to be scheduled; thus fluctuating generation of wind and solar can be compensated. Additionally, the quality of service in energy supply for the power customers throughout IREN2 tests is ensured.

    Power: 500 kVA
  • Load bank

    Load bank

    A load bank is a controllable electric consumer consisting of ohmic resistances to emulate a variable load. This component is used to cause electric stress to the grid during test operation. The response of single system components, such as the stationary battery storage, but also of the whole system can be analyzed and optimized by the use of such a load bank.

    Power: 0 to 150 kW, adjustable
  • Weather station

    Weather station

    The weather station is located at Wildpoldsried sports ground. It helps to better estimate the expected power output of the wind and photovoltaic systems.
  • Diesel Generator

    Diesel Generator

    In an island grid the electricity supply always has to be ensured – also in times of low regenerative power generation. Regenerative electricity generation from sustainable energy sources are – as well as wind and sun – an important contribution for the "Energiewende". Thus a diesel generator running on vegetable oil will be used additionally. The use of this generator can be scheduled because its availability is weather independent.

    Rated Power: 90 kVA
  • Intelligent distribution grid station Salzstrasse

    Intelligent distribution grid station Salzstrasse

    In the transformer station the 20.000 volts medium voltage is transformed to low voltage, supplying households with power. Large renewable generation units are connected here and the power is fed back to the grid via the transformer. In the station IRENE, major components such as the battery storage and the inverter coupling are connected with the power grid. Thus, for experimental purpuses in the research project IREN2, the desired switching status can be created at any time.
  • Office container

    Office container

    In order to run the project IREN2 smoothly, not only technical but also organizational challenges have to be mastered. All necessary office work will be managed in a specially equipped container.
  • Battery storage

    Battery storage

    In periods of high regenerative electricity generation the stationary battery storage, with the latest lithium-ion technology, can buffer electric energy and supply it back into the grid later. This performance is essential, especially in non-interconnected island grids in order to establish the equilibrium between consumption and generation of electric power and hence to ensure a stable operation of the grid at any time.

    Rated Power: 240 kVA (300 kVA peak power)
    Energy: 160 kWh
  • Microgrid Controller

    Microgrid Controller

    The Microgrid Controller is the brain of the microgrid, either if it works in islanded or grid-connected mode. It covers asset monitoring, blackout detection, black start, and automated grid modes for islanding and resynchronization, as well as reserve and state-ofcharge management with automatic start of backup generators. Generation offsetting and balancing (secondary control) in island mode, and, grid connected, it provides tie-line control for active and reactive power.
  • Inverter coupling

    Inverter coupling

    This inverter coupling unit allows the transmission of electric power into the IREN2 research grid and vice versa. This power electronics can be used like a photovoltaic plant or an energy storage system or like a controllable electric consumer. The inverter coupling device allows the practical simulation of any scenario that involves high dynamic demands. Typical situations which are important for the characteristic testing of the electric grid behaviour can by created at any time and independent of any external influence such as weather conditions.

    Rated Power: 500 kVA
  • Transformer station IRENE

    Transformer station IRENE

    In the transformer station the 20.000 volts medium voltage is transformed to low voltage, supplying households with power. Large renewable generation units are connected here and the power is fed back to the grid via the transformer. In the station IRENE, major components such as the battery storage and the inverter coupling are connected with the power grid. Thus, for experimental purpuses in the research project IREN2, the desired switching status can be created at any time.
  • Control technolgy

    Control technolgy

    The control technology for IREN2 is located in the so Energy Hotel "Kultiviert" in Wildpoldsried. The controller operates all systems using intelligent technologies and algorithms. This guarantees the best possible interaction and monitoring of all the elements applied – for maximum availability of the overall system.
  • Adjustable local power transformer

    Adjustable local power transformer

    Local substation transformers formerly transported power from higher voltage levels to households only. This "one-way road" is burdened with reverse flows today, as direction changes in times of high renewable generation, too. On load tap changer transformers (OLTC) are capable, by applying their transformation ratio, to cope with these different operational situations, and keep the voltage within the permitted limits.

    Taps at low voltage side by power electronics, 3 steps
    Power: 400 kVA
  • Municipal photovoltaic systems

    Municipal photovoltaic systems

    Wildpoldsried has invested approx. EUR 1.5 million in photovoltaic and – to a lesser extent – in wind power plants. On virtually every municipal building there are photovoltaic systems. The generated income is used for social projects that benefit the youth and the elderly of the community.
  • Church tower with radio relay

    Church tower with radio relay

    Radio relay systems are radio systems for transmitting information between fixed locations. In Wildpoldsried, the link is built up between steeple and local substation.
  • Photovoltaic system of an inhabitant of Wildpoldsried

    Photovoltaic system of an inhabitant of Wildpoldsried

    In a photovoltaic system solar cells convert a portion of solar radiation into electrical energy. Conventional photovoltaic systems on rooftops have an output at the low single-digit kW range, while commercial rooftop installations generate up to several MW.
  • The biogas plant of a Wildpoldsried power pioneer

    The biogas plant of a Wildpoldsried power pioneer

    Biogas plants are used to produce biogas through fermentation of biomass. Agricultural biogas plants usually are using animal excrement as manure and solid manure and energy crops as a substrate. This Wildpoldsried citizen first became involved in the generation of wind energy and then added biogas and later photovoltaics to his electricity mix.
  • The CHP of an Wildpoldsried citizen

    The CHP of an Wildpoldsried citizen

    A combined heat and power plant (CHP) is a modular system for obtaining electrical energy and heat, which is preferably operated at the site of the heat consumption. Useful heat can also be fed into a district heating network. The system uses the principle of cogeneration: both electrical power and heat are produced simultaneously.
  • Wind turbines

    Wind turbines

    The installed wind turbines in Wildpoldsried generate 16,800 MWh p.a.