Real-time Measurement Approach for Accurate Estimating the AV10 Value of EAF

This study investigates ac EAFs by making field measurements; with those results indicate that the estimated DeltaV₁₀ value obtained using the conventional method is significantly lower than the surveyed value. This paper found the DeltaQ_max value of the original design is too small to respond the actual variation of reactive power. Meanwhile, the difference of DeltaQ_max between design value and actual value is quite big. However, this investigation suggests that the DeltaQ_max estimate calculation must adopt a stricter standard. Therefore, we refer to the operation experience of manufacturers, namely that the biggest value of Costhetas_r equals 1.0 for ac EAFs. Furthermore, surveyed results reveal that the revised method can yield more accurate DeltaV₁₀ estimates than traditional method