Measurement of Electrical Characteristics

Grid Compatibility

DEWI carries out measurements and evaluations to determine the electrical characteristics of wind turbines, solar inverters and of other generation units/systems according to the currently applicable standards (e.g. IEC 61400-21 and FGW TR3) and is accredited by “German Accreditation Body” (DAkkS) according to ISO/IEC 17025:2005 and approved by MEASNET and FGW.

In the field of grid integration DEWI carries out measurements and evaluations to determine the electrical characteristics and grid compatibility of:

  • wind turbines
  • solar inverters
  • combustion engines (cogeneration, Biogas machines)
  • wind and solar farms
  • controller for wind and solar farms

Measurements are carried out according to the following guidelines:

  • IEC 61400-21: Measurement and assessment of power quality characteristics of grid connected wind turbines.
  • MEASNET: Power quality measurement procedure
  • Technische Richtlinien für Erzeugungseinheiten und -anlagen - Teil 3 (FGW)
  • AEE: Procedimientos de verificación, validación y certificación de los requisitos del PO 12.3 sobre la respuesta de las Instalaciones eólicas y fotovoltaicas ante huecos de tensión
  • DIN VDE V 0124-100: 2012-07: Grid integration of generator plants - Low-voltage

DEWI (Wilhelmshaven) is accredited by DAkkS for "Measurement of electrical characteristics of generation units and systems".

The service includes

Power Quality

  • Flicker and voltage fluctuations in normal operation and during switchings
  • Harmonics up to 9 kHz

Active power control

  • Power peaks
  • Active power set-point control
  • Ramp rate limitation
  • Power reduction due to overfrequency

Reactive power control

  • Reactive power capability
  • Set-point control

Disconnection from the grid

  • Grid protection (under-/overfrequency, under-/overvoltage)
  • Cut-in conditions

Response to temporary voltage drops

  • Ride-through
  • Reactive current injection
  • Behaviour during the fault and after fault clearance




Brochures and sell sheets can be downloaded here