Determination of power quality characteristics

Contact:

Dipl.-Ing. (FH) D. Lorke
Dipl.-Ing. M. Schultz
M.Sc. S.Scheer

INITIAL SITUATION

The proof of the electrical characteristics of a power generating unit (PGU) and a power generating plant (PGP) are the prerequisite for the connection of a PGP to the electrical supply grid. WIND-consult carries out these measurements of the electrical characteristics as a accredited measuring institute.

BENEFIT OF THE TEST RESULTS

• Provision of test results and parameters for the model validation and certification of PGU
• Planning security for clients, manufacturers and electric supply companies
• Avoidance of disturbing influences on other grid participants
• Operational test of the protection mechanism of the wind turbine
• Development of the system technology

BASICS OF METHODE

The power quality measurements offered by WIND-consult are based on valid national and international standards and guidelines e.g.:

• Technische Richtlinien für Erzeugungseinheiten und -anlagen, Teil 3: „Bestimmung der Elektrischen Eigenschaften von Erzeugungseinheiten und -anlagen am Mittel-, Hoch- und Höchstspannugsnetz” (FGW e.V.)
• IEC 61400-21 “Measurement and assessment of power quality characteristics of grid connected wind turbines” (IEC)

MEASURING RANGE

The determination of electrical characteristics is based on a 3-phase current and voltage measurement. With these data and the primary supply statements can make about the following point:

Performance characteristics
Determination of active-, reactive- and apparent power and power factor

Power quality characteristics
Determination of Flicker, Harmonics and Switching operations

Grid protection / Grid code
Testing of grid protection
In accordance with national and international grid codes a PGP must have certain capabilities of power limiting and reactive power control. When the power lines (FRT), they must actively support the grid. The WIND-consult creates concepts for measuring compliance with current grid code. Through a cooperation agreement with the windtest Grevenbroich GmbH, we are able to offer our customers the necessary test units for these tests.