Assessment of ride-through alternatives for adjustable-speed drives

Adjustable-speed drive (ASD) ride-through issues have caused increased conc erns due to the susceptibility of ASD's to power disturbances, and the cost ly results of process disruptions. These losses can be avoided for critical production processes by using ASD's with ride-through capabilities. This p aper assesses industrial ride-through requirements through power quality su rveys and the results of an ASD ride-through questionnaire conducted by the authors. ASD ride-through alternatives are evaluated based on design, impl ementation, and cost considerations, in order to determine the most suitabl e solutions for various kilovoltampere ratings and time duration requiremen ts.