Correction: Taleb et al. Measurement and Evaluation of Voltage Unbalance in 2 × 25 kV 50 Hz High-Speed Trains Using Variable Integration Period. Electricity 2024, 5, 154–173

Text Correction

There was an error in the original publication [1]. The errors we request to be corrected were observed in the text, and in Equations (13)–(17), where Ich should be I_ch, and the (−1) should be written as an exponent. The correct text and equations should be:

By replacing I_ch using Equation (10), Equation (12) can be reformulated as follows:

$$(\mathrm{P}-\mathrm{j}\mathrm{Q}){\left(E_1^{\ast }\right(\mathrm{a}-\mathrm{a}²\left)\right)}^{-1}\approx (\mathrm{a}²-\mathrm{a}){ I}_d$$

(13)

$$I_d\approx \left(\mathrm{P}-\mathrm{j}\mathrm{Q}\right){\left(E_1^{\ast }\left(\mathrm{a}-{\mathrm{a}}^2\right)\left({\mathrm{a}}^2-\mathrm{a}\right)\right)}^{-1}=(\mathrm{P}-\mathrm{j}\mathrm{Q}){\left(3E_1^{\ast }\right)}^{-1}$$

(14)

$$I_i{Z}_i\approx -(\mathrm{P}-\mathrm{j}\mathrm{Q}){\left({3E}_1^{\ast }\right)}^{-1}{Z}_i$$

(15)

$$I_i{Z}_i{\left(E_1\right)}^{-1}\approx -(\mathrm{P}-\mathrm{j}\mathrm{Q}){\left(3E_1{E}_1^{\ast }\right)}^{-1}{Z}_i \mathrm{i}\mathrm{n} \mathrm{P}\mathrm{U}$$

(16)

$$I_i{Z}_i{\left(E_1\right)}^{-1}\approx -(\mathrm{P}-\mathrm{j}\mathrm{Q}){\left(3\right[E_1]²)}^{-1}{Z}_d \mathrm{i}\mathrm{n} \mathrm{P}\mathrm{U}$$

(17)

But ${\left(3\right[E_1]²)}^{-1}{Z}_d$ is the short-circuit power level, while (P − jQ) is the conjugate of the load’s complex power.

The authors state that the scientific conclusions are unaffected. This correction was approved by the Academic Editor. The original publication has also been updated.