The water treatment process features numerous variable-speed pumps to process large amounts of fluids. By optimizing the electrical behavior of pumps controlled by variable frequency drives (VFD) avec Comsys ADF Active Harmonic Filter la technologie, GRYAAB increased the maximum output capacity of these systems by 30%.
“Merci à ADF nous pouvons maintenant traiter 30% plus de liquides pendant les périodes de demande de pointe. We also save energy.” |
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FondGRYAAB is the sewage works of the Gothenburg region in Sweden and its treatment plant Ryaverket os among the largest in all of Scandinavia. Central to saving the environment from pollution, les deux exigences de base sur cette infrastructure régionale critique sont fonctionnement constant et une capacité de traitement suffisante. Systèmes d'alimentation de secours UPS sont essentiels pour assurer une alimentation sûre et stable. Quand 17 new VFD-controlled pumps were installed at Ryaverket to increase plant capacity, harmonic distortion on the electrical system rose significantly. The resulting overcurrents caused the UPS fuses to melt. This was avoided by running the pumps at reduced speed. This was however a temporary solution since this reduced treatment capacity below demand. Les convertisseurs de fréquence sont une source bien connue des harmoniques potentiellement dommageables. |
Principaux avantages | Pump drives:
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Challenge – eliminating the harmonicsAfter consulting Ångpanneföreningen (ÅF), a premier Swedish consulting firm, Ryaverket announced a public procurement process seeking the implementation of active harmonic elimination technology. L'objectif était de récupérer la capacité de traitement complète en éliminant les harmoniques. Comsys won the procurement in competition with several renowned companies. Solution – ADF Active Filter unitsLe résultat a été l'installation de deux 600 kVA Comsys ADF Active Filter unités de gérer deux transformateurs alimentant 2160 kVA. Il y avait un certain nombre de caractéristiques de l' Comsys ADF solution that led to Ryaverket’s choice:
Result – harmonics eliminationThe harmonics elimination resulted in an increased max output capacity of 30%. |
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Tel: +46 46 286 35 00 • Fax: +46 46 286 35 05
E-mail:info@comsys.se

