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New Trends in Topology and Control of Converters for Power...
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New Trends in Topology and Control of Converters for Power Electronics Dominated Grids

A special issue of Electronics (ISSN 2079-9292). This special issue belongs to the section "Power Electronics".

Deadline for manuscript submissions: 15 October 2025 | Viewed by 2083

Special Issue Editor

Prof. Dr. Yi Wang

E-Mail Website
Guest Editor
Department of Electric Power Engineering, North China Electric Power University, Baoding 071003, China
Interests: topology and control of DC grids; grid-forming control of renewable energy

Special Issue Information

Dear Colleagues,

With the continuous promotion of large-scale renewable energy, conventional power systems are evolving towards power electronic-dominated grids (PEDGs). Highly aggregated power electronic converters do not provide a natural response to power system disturbances, thus posing challenges to grid stability. Grid-connected converter topology and control innovation are anticipated solutions for enhancing the stability of PEDGs, with next-generation converters considered to provide functionalities traditionally granted by synchronous generators.

This Special Issue aims to compile research on the latest converter topologies and control strategies for renewable sources and energy storage systems to improve PEDG performance. The areas of interest include but are not limited to the following: converter topology for transmission and distribution grids and renewable generation and energy storage systems; control and modeling of grid-connected converters; stability analysis of power electronic-dominated grids; grid-forming converters; and frequency oscillation suppression controllers.

Prof. Dr. Yi Wang
Guest Editor

Manuscript Submission Information

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • power electronic-dominated grid (PEDG), smart grid, and DC grid
  • topology, control, and modeling of grid-connected converters
  • modular multilevel converter and DC-DC converter
  • wind power generation and PV generation
  • energy storage system for grid support
  • grid-forming control and virtual synchronous machine control
  • stability analysis of converter-based power system
  • inertia support and frequency oscillation suppression

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Published Papers (2 papers)

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Research

19 pages, 7641 KiB  
Article
Control Strategy for Asymmetric Faults on the Low-Frequency Side of a Sparse Modular Multilevel Converter
by Yuwei Sun, Shengce Wang, Chao Fu, Zelin Zhang, Guoliang Zhao, Yunfei Xu, Bao Liu and Chen Jia
Electronics 2025, 14(3), 426; https://doi.org/10.3390/electronics14030426 - 22 Jan 2025
Viewed by 559
Abstract
Sparse modular multilevel converters (SMMCs) are a new type of lightweight high-voltage large-power AC/AC converter that significantly reduces the number of components compared to modular multilevel matrix converters (M3Cs). This study proposes a fault ride through a control strategy for SMMC to address [...] Read more.
Sparse modular multilevel converters (SMMCs) are a new type of lightweight high-voltage large-power AC/AC converter that significantly reduces the number of components compared to modular multilevel matrix converters (M3Cs). This study proposes a fault ride through a control strategy for SMMC to address the issues of arm energy imbalances and valve-side overvoltage, which occur during asymmetric faults on the low-frequency side. First, we establish models of the energy deviation of the arms under asymmetric short-circuit faults on the low-frequency side of SMMC. We also study the influence mechanism of the control strategies on the arm energy imbalance during faults. On this basis, an arm energy balancing strategy based on zero-sequence voltage injections combined with AC voltage control is proposed; this can achieve arm energy balance and suppress the negative sequence current and overvoltage of the SMMC. Finally, we construct a simulation model of an offshore wind power low-frequency transmission system based on the SMMC. The simulation results show that the proposed energy balance strategy can realize the stable operation of the low-frequency transmission system (LFTS) under asymmetric faults on the low-frequency side, that the maximum capacitor voltage deviation during the fault does not exceed 10% and that capacitor voltage returns to normal 0.25 s after the fault occurs. Full article
(This article belongs to the Special Issue New Trends in Topology and Control of Converters for Power Electronics Dominated Grids)
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25 pages, 13645 KiB  
Article
Model Order Reduction and Stability Enhancement Control for AC/DC Converters Through State Feedback Method
by Yi Lu, Wenqiang Bu, Qian Chen, Peng Qiu and Yanjun Tian
Electronics 2024, 13(23), 4760; https://doi.org/10.3390/electronics13234760 - 2 Dec 2024
Viewed by 796
Abstract
In the DC distribution networks, DC bus voltage is maintained by the grid-connected converter; the controllability and reliability of the grid-connected converter significantly affect the bus voltage characteristic. To address the problem of limited stability and frequent oscillations, this paper proposes a state [...] Read more.
In the DC distribution networks, DC bus voltage is maintained by the grid-connected converter; the controllability and reliability of the grid-connected converter significantly affect the bus voltage characteristic. To address the problem of limited stability and frequent oscillations, this paper proposes a state feedback control method for the AC/DC converter. Conventional AC/DC converter adopts the voltage-current double-closed-loop control structure with the proportional-integral (PI) controllers, which is the equivalent of the typical type II control system, but the typical type II control system cannot fully settle the stability and immunity problems. In contrast, the state feedback control strategy not only achieves the control objectives of the traditional double-closed-loop control but also reduces the AC/DC converter system model to a typical Type I system, which improves stability and thus enhances the oscillation suppression capability of the bus voltage. By selecting multiple state variables and designing the converter pole configuration range, the proposed single-loop state feedback control method manages to optimize both the dynamic and steady-state performances of the grid-connected AC/DC converter. Finally, the effectiveness of the proposed single-loop state feedback control strategy is verified through MATLAB (2018b)/Simulink software simulation and experiments on a DC distribution network platform. Full article
(This article belongs to the Special Issue New Trends in Topology and Control of Converters for Power Electronics Dominated Grids)
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