NerWind – ROMEG

NerWind delivers the qualified exclusive ROMEG methodology for your wind turbines.

NerWind supplies the ROMEG equipment, measurement services, training, reporting and technical assistance. The ROMEG measurement is a laser-based procedure for the verification of the dynamic and aeroelastic behavior of the wind turbine. The ROMEG can detect aerodynamic and indicate mass imbalances. The ROMEG system has been tested and approved by DEWI-OCC.

What ROMEG can do for you?

  • Measure the blade profiles, the tower movements and the blade-deflection
  • Measurement during operation without stopping the wind turbines (No yield loss).
  • Fast measurement process without installation of sensors and devices on the turbine.
  • Create a report with the performance results of the wind turbine on site.

What a well-balanced rotor provides you?

  • Increased annual energy production (AEP)
  • Reduction of operation and maintenance (O&M) costs
  • Lifetime extension of wind turbine

NerWind will provide you with:

  • Supply of ROMEG equipment
  • Training and technical assistance
  • Measurement Services with on-site reporting


ROMEG M Series

ROMEG M 20G is a laser device for geometric measurement of wind turbine Rotors.

The ROMEG measurement is a laser-based procedure for the verification of the dynamic and aeroelastic behavior of the rotor and the whole turbine.

ROMEG can detect aerodynamically excited imbalances and indicate mass excited imbalances.

Measurements are taken with the turbine in regular operation.


ROMEG Method

Two laser measurement distances are created for scanning the rotor blades at two points. Blade profiles and tower oscillations will be recorded in parallel.

The measurement is from distance without interruption of operation of the wind turbine, which does not require installation of additional equipment or sensor on the turbine.

The result is available immediately after the data collection.

Illustration of blade profiles measured with ROMEG:

Profiles with 0.2°

Profiles with 0.6°

Profiles with 1.2°

In addition to the blade profiles, tower movements will also be recorded and illustrated in relation to the number of revolutions

Tower movement with 0.2°

Tower movement with 0.6°

Tower movement with 1.2°

Our experience with plants measured “without suspicion” shows:

  • One in three WTG has an angular difference > 0.5°
  • One in four WTG has an angular difference > 1.0°

In contrast to an imbalanced turbine, a WTG with a well-balanced rotor shows the following attributes:

  • Increase Annual Energy Production (AEP);
  • Reduce operation and maintenance cost;
  • Extend the life of the wind turbine

Pitch Angle Measurement

Higher Yield with Reduced Loads

Identify and fix aerodynamic rotor imbalances.

Blade angle differences are the number one cause of aerodynamically excited imbalances. From an angle difference of 0.5° the tower shows a swinging behaviour characteristic of an unbalanced oscillation. The tower vibration is a good indicator for the level of imbalance.

The ROMEG method was developed by windcomp GmbH and is based on a reflector less laser distance measurement on the WTG in operation. With ROMEG measurement we log the blade profiles, the tower movements and the blade-deflection.

In the subsequent data analysis we evaluate the behaviour of tower and rotor.

The results are immediately available on site after data recording and analysis.

NerWind Management Team

U.S. Office

Masayuki Ito
Ronald Grey
Executive Vice President
Carina Costa
Vice President

Denmark Office

Nis Bennetzen
Chief Executive Officer
Steffen Larsson

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