This paper introduces a new self-balancing buck PFC Multilevel Rectifier based on a five-level Switched Capacitors (SCs) architecture. The proposed design offers a broad range of output voltage, enabling operation with various loads and accommodating both single and double/dual output modes. Additionally, it ensures effective load voltage balancing, even when the both loads have different values. The rectifier functions in buck operation mode and provides extensive output voltage regulation, making it suitable for simultaneous electric vehicle (EV) battery charging. To evaluate the performance of proposed rectifier this paper explores the operating principle, modulation strategy, closed-loop control, and experimental validation with same and different load variation scenarios.

The increasing use of distributed renewable energy sources and storage devices in the power grid has introduced new challenges related to the stability and reliability of the system. In response to these challenges, virtual power plants (VPPs) have emerged as a promising solution for integrating distributed energy resources (DERs) and improving power system performance. However, conventional VPPs have a number of limitations, such as the lack of real-time simulation capabilities, state of health monitoring, predictive maintenance, fault diagnosis, security and resiliency assessment. This paper proposes the application of digital twins (DTs) to address these limitations and improve VPP performance for prosumer dominated grid, focusing on dynamic state estimation, real-time control and optimization. The research reviews state-of-the-art studies that have applied the DT concept to power system applications, particularly microgrids, and presents a novel DT model for real-time orchestration in power electronics-dominated grids. The DT model utilizes available information regarding transmission lines, loads, and power electronic devices, along with measurement data.

Multiple port DC/DC converters have applications such as hybrid energy storage systems, DC microgrids and multi-level and multi-modular inverters which need multiple DC sources. This paper analyzes the control loops of an isolated multiport converter, the multiple active bridge converter, using the first harmonic approximation and the dq-decomposition at switching frequency. This allows using decoupling blocks which aid for controlling the power flows independently. However, as the measurements provided to the decoupling blocks are delayed by the filters in the acquisition system, this can lead to decreasing or even violation of the stability margins. This paper is focused in the analysis and design of such control loops in order to eliminate the effect of the measurement filters on the decoupling blocks. For that, the paper proposed a feed-forward technique with compensators which improve the stability of the converter without sacrificing the time response. The method is validated through extensive simulations.

With the rapid increase of renewable sources connected to the grid, a viable solution to ensure its stability is by deploying distributed Energy Storage Systems (ESS) along the grid. ESS should be capable of managing high-power ratings in short periods of time, thus supercapacitors (SCs) are attractive candidates to fulfill this requirement. ESS topologies based on the Modular Multilevel Converters (MMC) are both expandable and scalable in a manner that avoids the complexity of current systems. In this paper, we present a comparative study of multiple ESS through numerical simulations together with an application optimization for different scenarios.