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25.02.2020 | Pressemitteilungen

Success in Low Emission Condition Monitoring for Bachmann and Nordex Group

Rudolstadt, February 25, 2020

Bachmann Monitoring, leading provider of turbine monitoring systems, develops a Condition Monitoring System (CMS) with extremely low electromagnetic interference emissions for a highly sensitive Dutch wind park.

The EMC test facility at Bachmann electronic GmbH: Measurement of electromagnetic emissions

“Do Not Disturb – Highly Sensitive Neighborhood”: Dutch wind park De Drentse Monden en Oostermoer (DMO) represented a real technical challenge for Bachmann. The Condition Monitoring System (CMS) had to maintain electromagnetic interference emission levels significantly below the typical legal limit. In partnership with turbine manufacturer Nordex Group, whose N131/3900 turbine was built for particularly low interference emissions, Nordex and Bachmann presented a convincing solution to clients Duurzame Energieproductie Exloermond BV, Raedthuys DDM B.V. and Wind Park Oostermoer Exploitatie B.V.

The “DMO” wind park, expected to have a total capacity of 171.6 MW, is located near the central antenna field of the “Low-Frequency Array” (LOFAR). This Europe-wide network containing thousands of highly sensitive radio antennas is used by the Netherlands Institute for Radio Astronomy ASTRON to research the universe. To avoid interference with the world’s largest antenna network, electromagnetic emissions from the wind park must be kept to a minimum. To achieve this, Nordex asked Bachmann to reduce the emissions of its CMS, normally operating in the range of 30 MHz to 240 MHz, to a level of at least 35 dB below the quasi-peak value.

CMS for the most demanding requirements

“Our CMS first had to be examined intensively and then adapted to meet this challenging requirement. The emissions are currently far below the legal limits”, says Bachmann Monitoring GmbH Managing Director, Holger Fritsch. Emmision values were measured by independent third parties in the test turbine with installed CMS, erected by Nordex last year. ASTRON also confirmed very low electromagnetic emissions from the entire system.
Cooperation for Innovation and Precision

Nordex and Bachmann have enjoyed a successful partnership for over 10 years. In addition to Remote Monitoring services and CMS, new CMS functions are being jointly developed. This technological partnership also extends to the latest generation of the "Delta4000", in which the Bachmann GMP232 module is used for grid measurement, grid protection and wind park control.


About Nordex Group: The Nordex Group has installed more than 27 GW of wind energy capacity in over 40 markets and generated sales of around EUR 2.5 billion in 2018. The company currently employs over 6,500 people.

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