Load Scheduling Strategy to Improve Power Quality in Electric-Boosted Glass Furnaces

Garrido-Zafra, Joaquín; Moreno-Munoz, A.; Gil-de-Castro, Aurora; Bellido-Outeiriño, F.J.; Medina-Gracia, Ricardo; Gutierrez-Ballesteros, Elena

doi:10.1109/tia.2020.3029758

Cited by 3 publications

(2 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As regards the loads, the subharmonic generation is due to arc furnaces [20]- [21], cycloconverters [22]- [24], automated spot-welders, adjustable speed drives, fluctuating motors driving cyclic loads, power supplies to traction systems [25]- [26].…”

Section: A Literature Reviewmentioning

confidence: 99%

See 1 more Smart Citation

Measuring Harmonics With Inductive Voltage Transformers in Presence of Subharmonics

Crotti¹,

D’Avanzo²,

Letizia³

et al. 2021

IEEE Trans. Instrum. Meas.

View full text Add to dashboard Cite

The measurement of harmonics is one of the key tasks in the modern power systems, performed basically for power quality assessment, verification of planning levels compliance, immunity and compatibility purposes and so on. Especially at Medium Voltage (MV) and High Voltage (HV) levels, harmonics are always measured through Voltage and Current Transformers (VTs and CTs), which very often are inductive. Recent papers show that inductive VTs and CTs, due to the intrinsic iron core nonlinearity, can introduce errors up to some percent in harmonic measurements. The paper aims to investigate in-depth this phenomenon by analyzing how the accuracy of harmonic measurements performed through an inductive MV VT is affected by the presence subharmonics in its input voltage. Subharmonics are spectral components having frequencies lower than the power frequency, that is 50 Hz for European countries. Some theoretical considerations are carried out and the performance of two different inductive MV VTs are tested in various operating conditions. Experimental results show that subharmonics can worse the harmonic measurements done through inductive VTs up to some tens of percent.

show abstract

Section: A Literature Reviewmentioning

confidence: 99%

“…Both [20] and [21] show that subharmonics generated by arc furnaces have frequencies lower than 30 Hz, in particular spectral components having frequencies lower than 10 Hz are appreciable.…”

Section: A Literature Reviewmentioning

confidence: 99%