Combining capacitor/inductor and idling asynchronous motor in design of a system for balance of a large two-phase industrial load over three phases

• Published in: Second IEE International Conference on Power Electronics, Machines and Drives
• Main Authors: Coyle, E, O'Kelly, H, Farrell, M, Campbell, W.J
• Format: Conference Proceeding
• Language: English
• Published: Stevenage IEE 2004
• Subjects: Asynchronous machines; Glass and ceramics industries; Other power apparatus and electric machines; Power applications in glass, ceramic, brick and cement industries; Power convertors and power supplies to apparatus; Power semiconductor devices; Process heating; Relays and switches; Thermal variables control; idling asynchronous motor; two-phase industrial load; induction motors; temperature control; harmonic distortion; power harmonic filters; glass viscosity; power conversion harmonics; resistance furnaces; glass furnace production utilities; filter design; load (electric); capacitor/inductor; unbalanced nonlinear loads; power supply quality; electronic power switching; power inductors; power quality; glass manufacture; power capacitors; power semiconductor switches
• ISBN: 0863413838; 9780863413834
• DOI: 10.1049/cp:20040356

This paper describes the design and implementation of a new solution to power quality problems associated with large unbalanced nonlinear loads at fine glass furnace production utilities. Such furnaces use two-phase electricity for reasons of enhanced temperature control and in order to maintain consistency of glass viscosity. A significant risk of power failure is introduced due to this requirement. The furnace load is also nonlinear in nature, due to temperature control by electronic power switching. This gives rise to risks associated with high harmonic distortion. A new method in design of filters to alleviate problems associated with this type of load is also described. (5 pages)