Fraunhofer ISE's TestLab Power Electronics - Test Setup

TestLab Power Electronics - Measurement Equipment

Fraunhofer ISE's Outdoor Test Field

in Dürbheim / Baden-Württemberg, Germany

Fraunhofer ISE's Mobile LVRT Test Container

for Low Voltage Ride Through tests up to 4.5 MVA

Interior View of the LVRT Test Container

Testing of a Cogeneration Unit

on Fraunhofer ISE's outdoor test field

TestLab Power Electronics

Power electronic circuits are crucial connections between power generators, storage and consumers. Utmost efficiency, quality, and compliance with standards are decisive for them to be used affordably and be accepted in the market.

For our customers we characterize PV inverters, battery inverters, CHP, DC / DC converters, unidirectional and bidirectional chargers and module integrated electronics from watt to megawatt range. Our experience and modern, comprehensive lab equipment allow us to study the efficiency of your devices to see whether they comply with applicable standards and guidelines. Our experts provide you with a comprehensive assessment of the test outcome.

Detailed simulations of power electronics are indispensable for developing systems today. We provide support and services in the field of simulation and modeling of single components like PV inverters or CHP as well as entire PV parks, for example.

In cooperation with international certification bodies, we provide testing of power generating units connected to the medium voltage grid according to diverse grid codes and network guidelines. In addition to the German BDEW guidelines, we also have experience with the Chinese, Spanish, Italian, Romanian and several other supply directives.

The TestLab Power Electronics is accredited according to DIN EN ISO/IEC 17025:2005.

Scope of Accreditation

  • FGW TG3 Revision 23 (2013-05)
    Determination of electrical characteristics of power generating units and systems connected to MV, HV and EHV grids
  • FGW TR3 Revision 24 (2016-03)
    Determination of electrical characteristics of power generating units and systems connected to MV, HV and EHV grids
  • FGW TG4 Revision 7 (2014-04)
    Demands on Modelling and Validating Simulation Models of the Electrical Characteristics of Power Generating Units and Systems
  • FGW TG4 Revision 8 (2016-03)
    Demands on Modelling and Validating Simulation Models of the Electrical Characteristics of Power Generating Units and Systems
  • DIN EN 61400-21 (2009-06)
    Wind turbines - Part 21: Measurement and assessment of power quality characteristics of grid connected wind turbines
  • DIN EN 61683 (2000-08)
    Photovoltaic systems - Power conditioners - Procedure for measuring efficiency
  • DIN EN 50530 (2013-12)
    Overall efficiency of grid-connected photovoltaic inverters
  • TPLE-HV-001: Determination of the conversion efficiency of bidirectional inverters based on DIN EN 50530 (2013-12)
  • TLPE-HV-002: Determination of the active and reactive power of bidirectional inverters based on the TR3 (Rev. 24)
  • TLPE-HV-003: Determination of the Frequency-Active Power Performance (P(f)) of bidirectional inverters based on the TR3 (Rev. 24).

Scope of Measurements

  • Measurement of PV inverters based on various international grid codes (Germany, Italy*, Spain*, China* and other countries*)
  • Conversion and MPPT efficiency
  • On-site field measurements for power plants (e.g. wind, pv parks, etc.) 
  • Measurement of CHP and combustion engines on various international feed-in regulations (Germany, Italy*, Spain*, China* and other countries*)
  • Measurement and characterization of battery inverters and other power electronic components
  • Development of Arc Fault Detectors
  • Testing of Arc Fault Detectors with Arcing Simulator (Replay Method)

*For certification measurements in cooperation with an external accredited certifier.

Special Lab Equipment

  • 1.4 MW PV simulator (max. 2,000 V / max 1,760 A)
  • Bi-directional DC source up to 600 kW
  • Low Voltage Ride Through (LVRT) test facility  up to 1 MVA
  • Medium-voltage connection (20 kV)
  • 20 kV / 255-1,000 V / 1.25 MVA adjustable transformer
  • 600 kW three-phase grid simulator
  • Inductors and capacitors for grid impedance adjustment (2,000 A / 1,000 V)
  • Device for semiconductor characterization

Field Test Equipment

  • 1 MWp ground-mounted PV-array
  • Mobile 4.5 MVA LVRT Test Container

Measurement Equipment

  • High-precision power meters up to 5,000 A / 1,000 V
  • 60 - 5,000 A current transformer
  • GPS synchronization with up to 96 measurement channels
  • Sampling rate up to 1,000 kHz

Simulation Services

  • Generation and validation of inverter models for certification processes (e.g. according to FGW-TG4)
  • Detailed simulation of PV power plants for performance analysis and troubleshooting

Simulation and Analysis Software

  • MATLAB®/Simulink®, PLECS®
  • DigSILENT PowerFactory
  • Evaluation tools for inverter models
  • Software tools for harmonic and LVRT analysis


Roland Singer

Contact Press / Media

Roland Singer

TestLab Power Electronics

Fraunhofer ISE
Heidenhofstr. 2
79110 Freiburg

Phone +49 761 4588-5948

Sönke Rogalla

Contact Press / Media

Sönke Rogalla

Sustainable Grids and Power Plants

Fraunhofer ISE
Heidenhofstr. 2
79110 Freiburg

Phone +49 761 4588-5454

Frank Weichelt

Contact Press / Media

Frank Weichelt

Appointment Scheduling, Logistics, Quality Management

Fraunhofer ISE
Heidenhofstr. 2
79110 Freiburg

Phone +49 761 4588-5889

TestLab Power Electronics News

  • Zentrale Steuerung
    © Fraunhofer ISE

    The central activity of TestLab Power Electronics is the measurement and characterization of electronic power feed units for industrial customers. The spectrum ranges from solar inverters over battery converters to cogeneration units. Voltage drop tests, feed guideline reviews or efficiency degree measurements represent typical application scenarios. In meetings with customers, our test engineers discuss individual requests and needs and find tailor-made solutions. To retain such a degree of versatility and flexibility, our personnel must be expertly trained, and we must regularly look beyond our own nose.

    more info
  • AC/DC-Simulator im TestLab Power Electronics
    © Fraunhofer ISE

    In addition to highly precise measuring equipment, a customized activation for tests of inverters and grid integration and of the power electronics in general is extremely important. That is why TestLab Power Electronics has a direct connection to the medium-voltage power grid, solar simulators up to 1.4 MW as well as an outdoor test field in which inverters and cogeneration units of the multi megawatt class can be operated.

    more info
  • Measurement equipment at the TestLab Power Electronics
    © Fraunhofer ISE

    While testing standards for decentralized feeders like PV systems, CHP units or wind parks have existed for a long time, the boundary conditions for battery grid connection are not yet clearly defined. The TestLab Power Electronics at Fraunhofer ISE has taken on the task to propel the development of appropriate guidelines in order to support the emerging market of battery storage plants from the begin on.

    more info
  • Test engineers perform CHP measurements at the outdoor testing site
    © Fraunhofer ISE

    Since 2014 the Fraunhofer ISE Test Lab Power Electronics offers measurements on combined heat and power plants (CHPs) as part of its services. This complements their many years of experience with certification measurements on photovoltaic inverters. Fraunhofer ISE has the measurement equipment as well as the infrastructure to carry out certification measurements in their laboratory as well as in situ. For the in situ measurements, a mobile low-voltage ride through (LVRT) test container is put into use, which can measure units of up to 4.5 MVA. Measurements can be performed at the Institute’s outdoor testing field or at the CHP location depending on the client’s needs.

    more info
The TestLab Power Electronics is accredited by the DAkkS, Germany’s national accreditation body, according to DIN EN ISO/IEC 17025:2005 to perform studies on inverters and other components (e.g. battery inverter, CHP, etc.) up to a power of 4.5 MW.