For electric vehicles (EVs) on the move, the only viable solution of electromagnetic energy charging consists of static and dynamic charging, where Inductive Power Transfer (IPT) offers possibilities that no other technology can match. The main objective of this paper is the analysis of the energy charging technologies for vehicles, using magnetically coupled coils. The main idea of such a system consists of an electrified driveway which offers the vehicles the possibility of moving and charging at the same time. The article presents the wireless power transfer principles followed by a presentation of inductive wireless power systems and an example of a parallel-series topology.

The paper’s main objective is to demonstrate the trading and flexibility of services amongst TSOs, DSOs, and Prosumers in a transparent, secure, and cost-effective manner using Blockchain-based TSO-DSO flexibility marketplace (EFLEX). The aim is to look for ways to help DSOs/TSOs be more flexible and more directly engaged in managing energy flows on the network. EFLEX will streamline the needs of both TSO and DSO on the same platform. Based on the paper’s proposed services, the pilot service demonstration will be carried out in Bulgaria and Romania, and the main focus will be on congestion management, TSO-DSO Coordination, and Marketplace. The proposed objective is achieved by using Blockchain-based smart contracts and distributed ledger technology.

For critical infrastructures, technological developments regarding real-time data transmission and processing improve the system’s operability and reliability. However, vulnerabilities are introduced in the case of implementing new remote access methods or where redundancy is low. At the national level, most critical infrastructures are connected, and, therefore, achieving a level of security and resilience is based on identifying a multitude of risks. In this respect, the reduction of risk to acceptable levels directly affects the quality of citizens’ lives and decreases losses in the industry. This study starts from the threats to power systems, namely cyberattacks, which are much more dangerous, although less visible, to operators, and almost invisible to the public or the media. From this point of view, it was proved that the most vulnerable parts of the power system were human–machine interfaces, electrical equipment, Surveillance, Control, and Data Acquisition (SCADA) systems. This paper’s main achievements include the simulation of cyberattacks on existing electrical equipment from a petrochemical plant (case study), which consists of modifying the remote data transmitted by the SCADA system. Two locations were submitted to simulated cyberattacks that were considered critical for the overall plant operation. Furthermore, the changes that occur following each fault resulting from the cyberattack and the influence of the electrical parameter changes upon the process flow were analyzed. Furthermore, by using Electrical Power System Analysis Software—ETAP—the changes that occur following each fault due to the cyberattack and the influence of the electrical parameter changes upon the process flow were analyzed. By considering the two malfunction events, the resilience assessment of the system was analyzed. In the second case, only partial resilience action, up to 40%, restored the operability of the industrial power plant.

In this paper the authors applied analytical, and experimental procedures for investigating the operation of the three-phase induction motor (IM) energized from an unbalanced voltage supply and in the presence of harmonics. The main direction of investigation focuses on motor performance. The analytical model of the IM includes the effects of the voltage unbalance through the presence of positive and negative sequence parameters, as well as the effects of harmonics. The model takes into account the skin effect due to the presence of the higher frequency harmonics. The overall procedure proven to deliver a complete mapping of the IM operation, including the calculation of the unbalanced current, all categories of loss, developed torque, as well as the assessment of the harmonic effects. The final result of the work becomes useful in regards to IM rerating for the reason of preserving its lifespan.

This paper presents the correct formulation of scattering parameters S, using electric circuit theory, and the practical use of these parameters. The purpose is to make more efficient the processes for the information transmission and the wireless electromagnetic energy transfer. The efficiency is seen from the transmission point of view of the signals (from the transmitter to receiver) and from the active power transfer efficiency point of view (from the wireless system's input to the loads connected at their outputs). Starting from the correct formulation of S parameters, their computation takes place automatically based either on state equations or on modified nodal equations of the wireless power transfer systems (WPTS). The two magnetically coupled coils, considered as a passive linear 2-port network in harmonic regime, can be described by a number of equivalent circuit's parameters, such as: the transfer coefficients matrix T, the impedance matrix Z, the admittance matrix Y and the matrix corresponding to S parameters. This paper presents the relationships that allow the transition from one matrix to another. To generate: the coefficients corresponding to reflection, the input and output impedances, the input-output (output-input) active power transmission efficiencies, the signal transmission efficiencies, the S, H T, Z and Y matrices, and the Smith charts, we elaborated MATLAB dedicated functions by using the existing routines form the Microwave MATLAB toolbox.