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Applied Sciences
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Electric Power System Stability and Control
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Electric Power System Stability and Control

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Electrical, Electronics and Communications Engineering".

Deadline for manuscript submissions: closed (20 January 2025) | Viewed by 4253

Special Issue Editor

Dr. Yang Liu

E-Mail Website
Guest Editor
School of Electric Power Engineering, South China University of Technology, Guangzhou 510641, China
Interests: stability analysis; direct methods of transient stability; switched control; nonlinear adaptive control

Special Issue Information

Dear Colleagues,

With the growing integration of renewable power generation sources into the electric power grid, power electronic converters and their controllers are introducing different dynamics and instability phenomena into power systems. Advances are needed in modeling, analysis, and control methods. This Special Issue aims to advance the stability analysis and control of electric power systems with high levels of distributed generation and the associated incorporation of power converters. The scope of this Special Issue includes but is not limited to the following topics: control of power electronic converters; stability analysis of power systems with high integration of renewable generation; stability control of large-scale power systems; pertinent electric circuit modeling and analysis methods; and industrial practices.

Dr. Yang Liu
Guest Editor

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Keywords

  • stability control
  • stability analysis
  • electric power systems
  • modeling of electric circuits
  • electric circuit analysis

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Published Papers (4 papers)

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Research

24 pages, 10784 KiB  
Article
A Novel Variable-Step Algorithm for DC-Side Voltage Stability Control Strategy in UPQC to Improve Power Quality
by Kai Song, Ningning Li, Cong Li, Zihui Lian, Hongxu Li, Jiawen Sun, Shulin Jiang and Boyan Huang
Appl. Sci. 2025, 15(5), 2513; https://doi.org/10.3390/app15052513 - 26 Feb 2025
Viewed by 385
Abstract
With the development of semiconductor technology, the increasing number of power electronic converters and nonlinear loads has further exacerbated power-quality issues in the grid. To address this, this paper presents an improved DC-side voltage control strategy for UPQC, aiming to enhance power quality [...] Read more.
With the development of semiconductor technology, the increasing number of power electronic converters and nonlinear loads has further exacerbated power-quality issues in the grid. To address this, this paper presents an improved DC-side voltage control strategy for UPQC, aiming to enhance power quality under complex conditions. First, an adaptive filter is integrated into the linear active disturbance rejection control (LADRC) to address control accuracy issues caused by noise and parameter variations. To solve the voltage sag problem resulting from the filter, the effects of fixed-step and various variable-step algorithms within the filter are analyzed, and the optimal control strategy is identified. Simulation results demonstrate that the proposed arctangent function-based variable step-size algorithm (VAV-LADRC) strategy effectively improves the UPQC system’s performance in mitigating voltage sags, swells, and harmonics under dynamic load changes, enhancing the stability of the DC-side voltage. To further validate the generalizability of the method, a co-simulation of a photovoltaic power-generation system with the UPQC is conducted, simulating variations in solar irradiance. The results show that the proposed method maintains excellent control performance under complex conditions, providing a better practical solution for the efficient use of green energy. Full article
(This article belongs to the Special Issue Electric Power System Stability and Control)
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20 pages, 7724 KiB  
Article
Dynamic Damping of Power Oscillations in High-Renewable-Penetration Grids with FFT-Enabled POD-P Controllers
by Marta Bernal-Sancho, Marta Muñoz-Lázaro, María Paz Comech and Pablo Ferrer-Fernández
Appl. Sci. 2025, 15(3), 1585; https://doi.org/10.3390/app15031585 - 4 Feb 2025
Cited by 1 | Viewed by 1012
Abstract
The growing integration of renewable energy sources, particularly photovoltaic (PV) and wind power, presents challenges such as reduced system inertia and increased susceptibility to inter-area oscillations. These issues, coupled with stricter regulatory demands for grid stability, highlight the urgent need for effective damping [...] Read more.
The growing integration of renewable energy sources, particularly photovoltaic (PV) and wind power, presents challenges such as reduced system inertia and increased susceptibility to inter-area oscillations. These issues, coupled with stricter regulatory demands for grid stability, highlight the urgent need for effective damping solutions. This study proposes a novel method for detecting and mitigating inter-area oscillations using a power oscillation damping (POD) controller enhanced by applying a Fast Fourier Transform (FFT). The controller’s parameters are optimized through the Nobel Bat Algorithm (NBA) and fully implemented in DIgSILENT PowerFactory (DSPF). Simulations conducted on the New England IEEE-39 power system model under varying levels of renewable energy penetration demonstrate the model’s capability to dynamically detect, mitigate, and deactivate oscillations once stability is achieved. This work addresses emerging regulations requiring oscillation damping systems and offers a framework for certifying POD controllers for real-world implementation, ensuring their adaptability to diverse energy systems and regulatory contexts. Full article
(This article belongs to the Special Issue Electric Power System Stability and Control)
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18 pages, 5693 KiB  
Article
A Novel Approach to Transient Fourier Analysis for Electrical Engineering Applications
by Mariana Beňová, Branislav Dobrucký, Jozef Šedo, Michal Praženica, Roman Koňarik, Juraj Šimko and Martin Kuchař
Appl. Sci. 2024, 14(21), 9888; https://doi.org/10.3390/app14219888 - 29 Oct 2024
Cited by 1 | Viewed by 1174
Abstract
This paper presents a detailed investigation into the application of transient Fourier analysis in select electrical engineering contexts. Two novel approaches for addressing transient analysis are introduced. The first approach combines the Fourier series with the Laplace–Carson (L-C) transform [...] Read more.
This paper presents a detailed investigation into the application of transient Fourier analysis in select electrical engineering contexts. Two novel approaches for addressing transient analysis are introduced. The first approach combines the Fourier series with the Laplace–Carson (L-C) transform in the complex domain, utilizing complex time vectors to streamline the computation of the original function. The inverse transformation back into the time domain is achieved using the Cauchy-Heaviside (C-H) method. The second approach applies the Fourier transform (F-Τ) for the transient analysis of a power converter circuit with both passive and active loads. The method of complex conjugate amplitudes is employed for steady-state analysis. Both contributions represent innovative approaches within this study. The process begins with Fourier series expansions and the computation of Fourier coefficients, followed by solving the system’s steady-state and transient responses. The transient states are then confirmed using the Fourier transform. To validate these findings, the analytical results are verified through simulations conducted in the Matlab/Simulink R2023b environment. Full article
(This article belongs to the Special Issue Electric Power System Stability and Control)
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20 pages, 6680 KiB  
Article
Stability Comparison of Grid-Connected Inverters Considering Voltage Feedforward Control in Different Domains
by Weichen Qian, Jun Yin and Ziang Chen
Appl. Sci. 2024, 14(19), 9026; https://doi.org/10.3390/app14199026 - 6 Oct 2024
Cited by 1 | Viewed by 1177
Abstract
Under the background of high permeability, voltage feedforward control may further weaken the stability of grid-connected inverter (GCI) systems and may cause sub-synchronous oscillation in extreme cases. To solve this problem, this paper firstly considers the influence of the frequency coupling effect and [...] Read more.
Under the background of high permeability, voltage feedforward control may further weaken the stability of grid-connected inverter (GCI) systems and may cause sub-synchronous oscillation in extreme cases. To solve this problem, this paper firstly considers the influence of the frequency coupling effect and voltage feedforward control, and adopts the harmonic linearization method to construct the L-type GCI sequence admittance model with PI (proportional integral) control and PR (proportional resonant) control, respectively. By comparing the sequence admittance characteristics of the GCI under two control strategies, combined with the sequence admittance model and Nyquist criterion, this paper analyzes the influence of voltage feedforward and control parameters on the stability of the GCI under two control strategies. The results show that the stability of GCI under PR control is slightly better than that under PI control. At the same time, the voltage feedforward control does reduce the stability of the GCI system under the two control strategies. Finally, the accuracy of the theoretical analysis is verified by simulation and experiment. Full article
(This article belongs to the Special Issue Electric Power System Stability and Control)
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