Wind farms and harmonics: solve the issue at design stage

Written

The concern

Each time a new wind farm is connected to the network,  there is a possibility that the harmonic currents generated from turbine might become amplified to an unacceptable level. This is a known issue on wind farm sites that has resulted in considerable breaches of IEC 61000-3-6 standard at MV/HV level and also in some critical cases given rise to a significant impairment of equipment reliability and to expensive equipment failure.

The Solution

Addressing this harmonic issue at the design stage of wind farm development is vital to sustaining high reliability of the installation in the future. It can be achieved through detailed software modelling of the network in dedicated software package (DigSilent, SKM, DesignBase, ERACS), which allows identification of resonance issues, calculation of harmonic content at point of common coupling and selection of correct mitigation method if issues are identified. Early identification of the problem will also allow the most cost efficient implementation.

 

It should be highlighted that sustaining of low harmonic emissions is required to prevent potential penalties from the utility side. Planning limits, brought in by EirGrid, are much more stringent than the IEC standard compatibility thresholds. It is unavoidable, to allow further uninterrupted expansion of the Irish grid. The same approach was taken in the UK where G5/4-1 engineering recommendation is now in place.

Michal Sopocko is Engineering Manager with Premium Power and a Michael-quotechartered member of the Institute of Engineers of Ireland. He holds a Masters degree in Electrical and Electronics Engineering from Poznan University of Technology. He has vast experience of solving harmonic issues. 

Facebook
Twitter
LinkedIn

Recent News & Events

ARC FLASH MITIGATION

Understanding Arc Flash mitigation

The definition of mitigation is ‘to make milder, less severe or less violent.’ When applied to electrical workplace safety, arc flash mitigation involves taking steps to minimise the level of ...

Read More

Engineers Week 2020

Engineers week is taking place from the 29th of February until the 6th of March. Now in its 14th year , the idea of the week is to promote engineering ...

Read More
2020 with loading bar

Round up of 2019

As 2019 draws to a close why not take a look back on everything that has been a topic of discussion during the year. Blogs and articles Throughout the year ...

Read More

Please activate some Widgets.