From the Editor

This issue features three articles, the first of which is “Advancing Space Charge Test Techniques: Pulsed Electro-Acoustic Measurement on a 525-kV HVDC Cable.” The aim of this article is to validate the procedure of assessing the effect of space charge accumulation in extruded HVDC cables. The article presents the results of a pulsed electro-acoustic (PEA) measurement following the protocol recommended by IEEE standard 1732–2017 (IEEE Recommended Practice for Space Charge Measurements on High-Voltage Direct-Current Extruded Cables for Rated Voltages up to 550 kV). A full-size, unaged HVDC cable rated to 525 kV was the chosen sample, with two tests conducted in positive and negative DC polarities. This study demonstrates the reproducibility of the PEA measurement on full-size HVDC cables over 100 meters in length and the applicability of the PEA measurement protocol in the IEEE standard 1732-2017.