This article presents both an analysis and selected research of key components of modern AAES (PES, EPS) aircraft power supply system based on advanced architecture of HVDC system playing an important role in the concept of electrified MEA/AEA aircraft. Selected components of this system have been tested, with special attention paid to the PES system, based, in the high voltage range, on multi-pulse rectifiers. Based on the above, the main aim of the article is to highlight the essence of the functionality of high voltage HVDC DC power supply systems implemented on advanced aircraft compliant with the MEA/AEA concept. A special role in this aspect is played by the aviation of military aircraft JSF F-35 and F-22 Raptor of the aviation corporation Lockheed Martin, as well as the civil aviation of leading airlines Airbus in the field of aircraft A-380 and A-350 XWB and Boeing in the field of aircraft Dreamliner B-787, which are fully compatible with the MEA/AEA trend. In the final part of the work, based on the analysis, created mathematical models of selected AAES components (EPS, PES) in the field of PES and selected simulation tests, practical conclusions and observations were formulated.