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Prof. Dr. Da Xie

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Department of Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Prof. Dr. Yanchi Zhang

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School of Electrical Engineering, Shanghai Dianji University, Shanghai 201306, China

Prof. Dr. Dongdong Li

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School of Electrical Engineering, Shanghai University of Electric Power, Shanghai 200090, China

Dr. Chenghong Gu

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Department of Electronic and Electrical Engineering, University of Bath, Bath BA2 7AY, UK

Dr. Ignacio Hernando-Gil

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Department of Electrical Engineering, ESTIA Institute of Technology, 64210 Bidart, France

Dr. Nan Zhao

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School of Engineering, Lancaster University, Lancaster LA1 4YW, UK

Power System Dynamics and Stability

Abstract submission deadline

closed (29 February 2024)

Manuscript submission deadline

31 May 2024

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14074

Topic Information

Dear Colleagues,

With the increase in power electronic components and equipment, the power electronization of new power systems will lead to fundamental changes in their structural characteristics, operating characteristics and control mode, thus causing complex electromagnetic transient processes and dynamic stability problems. These will challenge the safe and stable operation of power systems. In order to ensure the safe and stable operation of power electronic power systems, the goal of this Topic is to reveal the operation mechanism of the power electronic power system, establish the numerical simulation model of the power electronic power system, analyze and study the theory of instantaneous electrical parameters and electromagnetic transient stability theory, explore new control methods and new power equipment and realize more accurate analysis models, reasonable and stable analysis ideas, control technologies and intelligent management and control strategies for power electronic power systems.

The objective of this Topic is to encourage the dissemination of new concepts, ideas and novel methods for analyzing the modeling and dynamic stability of power electronic power systems. It aims to disseminate fundamental research, innovation and information exchange in these related fields. Application papers are also highly welcome. Topics of interest include, but are not limited to:

Security and stability analysis of power electronic power systems;
Research on the mechanism model of power electronic power systems;
Research on electromagnetic transient simulation model of power electronic power systems;
Analysis of the power electronic power system simulation method;
Power electronic power system oscillation analysis and suppression measures;
Power electronic power system oscillation control method;
Power electronic power system stability and control based on cloud computing and artificial intelligence;
Parameter optimization method for power electronic power system control;
Research on grid connection control strategy and method;
Mechanism analysis method of power electronic power system;
Power electronic oscillation suppression device;
Research on operation mode of power electronic power systems.

Prof. Dr. Da Xie
Prof. Dr. Yanchi Zhang
Prof. Dr. Dongdong Li
Dr. Chenghong Gu
Dr. Ignacio Hernando-Gil
Dr. Nan Zhao
Topic Editors

Keywords

power electronics
power system
modeling
dynamic stability analysis
mechanism analysis
simulation method
control strategy

Participating Journals

Journal Name	Impact Factor	CiteScore	Launched Year	First Decision (median)	APC
Electricity electricity	-	-	2020	20.3 Days	CHF 1000	Submit
Electronics electronics	2.9	4.7	2012	15.6 Days	CHF 2400	Submit
Energies energies	3.2	5.5	2008	16.1 Days	CHF 2600	Submit
Mathematics mathematics	2.4	3.5	2013	16.9 Days	CHF 2600	Submit
Processes processes	3.5	4.7	2013	13.7 Days	CHF 2400	Submit

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Published Papers (11 papers)

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16 pages, 6036 KiB

Open AccessArticle

Analysis of Phase-Locked Loop Filter Delay on Transient Stability of Grid-Following Converters

by Chenglin Zhang, Junru Chen and Wenjia Si

Electronics 2024, 13(5), 986; https://doi.org/10.3390/electronics13050986 - 05 Mar 2024

Viewed by 605

Abstract

To ensure precise phase estimation within the q-axis of the phase-locked loop (PLL), integrating a filter into the q-axis loop is essential to mitigate grid-voltage harmonics. Nevertheless, the intrinsic delay characteristics of this filter impede PLL synchronization during significant grid disturbances. This study begins by developing mathematical models for three types of filters—moving-average filter (MAF) for eliminating odd harmonic components, dq-frame cascaded delayed signal cancellation (dqCDSC) filter, and notch filter (NF). Following the reduction in filter orders, a third-order nonlinear large-signal model of the PLL, incorporating an additional q-axis internal filter, is formulated. Using phase plane analysis, this study investigates the transient synchronism of the grid-following converter (GFL) and explores the influence of delay time constants from the three PLL filters on its behavior while delineating the boundaries of their basins of attraction. Theoretical findings indicate that, relative to the traditional SRF-PLL, incorporating an internal filter into the PLL compromises the transient synchronous stability of GFL. Specifically, greater filter delay time constants exacerbate the GFL’s vulnerability to transient instability amid substantial grid disturbances. Hence, careful consideration is essential when using MAF-PLL and NF-PLL in situations demanding high synchronization stability. The theoretical analyses are validated using Matlab/Simulink to verify their accuracy. Full article

(This article belongs to the Topic Power System Dynamics and Stability)

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29 pages, 1596 KiB

Open AccessArticle

Effect of a Large Proton Exchange Membrane Electrolyser on Power System Small-Signal Angular Stability

by Guy Wanlongo Ndiwulu, Eduardo Vasquez Mayen and Emmanuel De Jaeger

Electricity 2023, 4(4), 381-409; https://doi.org/10.3390/electricity4040021 - 01 Dec 2023

Viewed by 753

Abstract

The dynamics of electrical systems have changed significantly with the increasing penetration of non-conventional loads such as hydrogen electrolysers. As a result, detailed investigations are required to quantify and characterize these loads’ effects on the dynamic response of interconnected synchronous machines after being subjected to a disturbance. Many studies have focused on the effects of conventional static and dynamic loads. However, the impact of hydrogen electrolysers on the stability of power systems’ rotor angles is rarely studied. This paper assesses the effect of proton exchange membrane (PEM) electrolysers on small-disturbance rotor-angle stability. Dynamic modelling and the control of a PEM electrolyser as a load are first studied to achieve this. Then, the proposed electrolyser model is tested in the Amercoeur plant, which is part of the Belgian power system, to study its effect on the small-signal rotor-angle stability. Two approaches are considered to examine this impact: an analytical approach and time-domain simulations. The analytical approach consists of establishing a state-space model of the Belgian test system through linearisation around an operating point of the non-linear differential and the algebraic equations of the synchronous generators, the PEM electrolyser, the loads, and the network. The obtained state-space model allows for the determination of the eigenvalues, which are useful to evaluate the effect of the PEM electrolyser on the small-signal rotor-angle stability. This impact is investigated by examining the movement of the eigenvalues in the left complex half-plane. The obtained results show that the PEM electrolyser affects the electromechanical modes of synchronous machines by increasing their oscillation frequencies. The results also show that the effect of the electrolyser on these modes can be improved by adjusting the inertial constant and the damping coefficient of the synchronous machines. These results are consolidated through time-domain simulations using the software Matlab/Simscape from the version MatlabR2022a-academic use from Mathworks. Full article

(This article belongs to the Topic Power System Dynamics and Stability)

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15 pages, 2485 KiB

Open AccessArticle

Supplementary Control of Conventional Coordinated Control for 1000 MW Ultra-Supercritical Thermal Power Plant Using One-Step Ahead Control

by Hyuk Choi, Yeongseok Choi, Un-Chul Moon and Kwang Y. Lee

Energies 2023, 16(17), 6197; https://doi.org/10.3390/en16176197 - 25 Aug 2023

Cited by 2 | Viewed by 869

Abstract

The intermittence of renewable energy sources increases the importance of the effective load-tracking ability of power plants. Coordinated control between boiler and turbine systems is the uppermost layer of a thermal power plant control to follow the load demand. In this paper, a supplementary controller is proposed based on the One-Step Ahead strategy for coordinated control of thermal power plants. After a plant model is developed offline from a step response test, the optimized control of the One-Step Ahead strategy is applied to the boiler feed-forward (BFF) signal to control the electric power output and the main steam pressure simultaneously. Simulation with a 1000 MW ultra-supercritical (USC) once-through type power plant is performed. The results show that the error of Mega-Watt Output (MWO) was reduced to 78~95%, and settling time was reduced to 64~79% from conventional coordinated control by adding the proposed supplementary controller. Full article

(This article belongs to the Topic Power System Dynamics and Stability)

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30 pages, 10154 KiB

Open AccessArticle

New Technology and Method for Monitoring the Status of Power Systems to Improve Power Quality—A Case Study

by Rahim Ildarabadi and Mahmoud Zadehbagheri

Processes 2023, 11(8), 2468; https://doi.org/10.3390/pr11082468 - 16 Aug 2023

Viewed by 898

Abstract

The identification and analysis of harmonics, frequency, and transient events are essential today. It is necessary to have available data relating to harmonics, frequency, and transient events to understand power systems and their proper control and analysis. Power quality monitoring is the first step in identifying power quality disturbances and reducing them and, as a result, improving the performance of the power system. In this paper, while presenting different methods for measuring these quantities, we have made some corrections to them. These reforms have been obtained through the analysis of power network signals. Finally, we introduce a new monitoring system capable of measuring harmonics, frequency, and transient events in the network. In addition, these values are provided for online and offline calculations of harmonics, frequency, and transient events. In this paper, two new and practical methods of the “algebraic method” are used to calculate network harmonics and wavelet transform to calculate transient modes in the network. Furthermore, the proposed monitoring system is able to reduce the amount of data-storage memory. The results of the simulations performed in this article show the superiority of using the new method presented for online and offline monitoring of power quality in electric power systems. Full article

(This article belongs to the Topic Power System Dynamics and Stability)

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17 pages, 4540 KiB

Open AccessArticle

Impact Mechanisms of Commutation Failure Caused by a Sending-End AC Fault and Its Recovery Speed on Transient Stability

by Yifeng Lin, Jiawei Hu, Tong Wang and Zengping Wang

Electronics 2023, 12(16), 3439; https://doi.org/10.3390/electronics12163439 - 14 Aug 2023

Cited by 1 | Viewed by 571

Abstract

A sending-end AC fault may lead to commutation failure (CF) in a line-commutated converter high-voltage direct current (LCC-HVDC) system. In this paper, a theoretical analysis of the impact mechanisms of a CF and its recovery speed on the transient stability of a sending-end power system (TSSPS) is performed. Firstly, the models of the sending-end power system and DC power of CF are established; the ramp function is utilized to characterize the DC power recovery process. Secondly, the swing direction of the relative rotor angle caused by a sending-end AC fault is discussed, and the DC power flow method is employed to theoretically analyze the impacts of CF and its recovery speed on TSSPS. Next, the mathematic relations between parameters of the voltage-dependent current order limiter (VDCOL) and DC power recovery speed are further derived. It is concluded that the impacts of CF and its recovery speed on transient stability are related to the swing direction caused by a sending-end AC fault, the inertia of generators, and the location of the rectifier station. Finally, the theoretical analysis is validated by Kundur’s two-area system and IEEE 68-bus-based AC/DC asynchronous interconnection test power systems, respectively. Full article

(This article belongs to the Topic Power System Dynamics and Stability)

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16 pages, 1089 KiB

Open AccessArticle

Novel Heuristic Optimization Technique to Solve Economic Load Dispatch and Economic Emission Load Dispatch Problems

by Nagendra Singh, Tulika Chakrabarti, Prasun Chakrabarti, Martin Margala, Amit Gupta, S. Phani Praveen, Sivaneasan Bala Krishnan and Bhuvan Unhelkar

Electronics 2023, 12(13), 2921; https://doi.org/10.3390/electronics12132921 - 03 Jul 2023

Cited by 9 | Viewed by 1463

Abstract

The fundamental objective of economic load dispatch is to operate the available generating units such that the needed load demand satisfies the lowest generation cost and also complies with the various constraints. With proper power system operation planning using optimized generation limits, it is possible to reduce the cost of power generation. To fulfill the needs of such objectives, proper planning and economic load dispatch can help to plan the operation of the electrical power system. To optimize the economic load dispatch problems, various classical and new evolutionary optimization approaches have been used in research articles. Classical optimization techniques are outdated due to many limitations and are also unable to provide a global solution to the ELD problem. This work uses a new variant of particle swarm optimization techniques called modified particle swarm optimization, which is effective and efficient at finding optimum solutions for single as well as multi-objective economic load dispatch problems. The proposed MPSO is used to solve single and multi-objective problems. This work considers constraints like power balance and power generation limits. The proposed techniques are tested for three different case studies of ELD and EELD problems. (1) The first case is tested using the data of 13 generating unit systems along with the valve point loading effect; (2) the second case is tested using 15 generating unit systems along with the ramp rate limits; and (3) the third case is tested using the economic emission dispatch (EELD) as a multi-objective problem for 6 generating unit systems. The outcomes of the suggested procedures are contrasted with those of alternative optimization methods. The results show that the suggested strategy is efficient and produces superior optimization outcomes than existing optimization techniques. Full article

(This article belongs to the Topic Power System Dynamics and Stability)

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20 pages, 9687 KiB

Open AccessArticle

Research on the Access Planning of SOP and ESS in Distribution Network Based on SOCP-SSGA

by Yuxin Jia, Qiong Li, Xu Liao, Linjun Liu and Jian Wu

Processes 2023, 11(6), 1844; https://doi.org/10.3390/pr11061844 - 19 Jun 2023

Cited by 2 | Viewed by 1107

Abstract

This paper proposes a two-stage planning model for soft open point (SOP) and energy storage system (ESS) that considers the cost of faults in response to the current issue of SOP and ESS systems not considering the impact of SOP access on load transfer in the event of a fault in the distribution network. Firstly, considering the uncertainty of “PV-load”, typical scenarios of PV and load are constructed based on the clustering algorithm. Secondly, aiming at the economic performance of the distribution network and the capacity of PV access, a two-stage optimization model is established for the joint integration of SOP and ESS into the distribution network (normal and fault operation) under typical scenarios. The model is solved by using the second-order cone programming algorithm and steady-state genetic algorithm (SOCP-SSGA). Stage one involves planning for the integration capacity and location of SOP and ESS into the distribution network under each scenario within a period based on SOCP with the goal of minimizing economic costs. In stage two, the PV access capacity of the distribution network is optimized using SSGA with the goal of enhancing the PV accommodation capability. Finally, verification and analysis are conducted on an improved IEEE33 node system. The results show that when the system optimizes access to a group of SOP and ESS, the total economic cost is reduced by RMB 61,729 compared to random access, and the accessible PV capacity is increased by 0.5278 MW. Moreover, optimizing access to two sets of SOP and ESS can further reduce the total economic cost by RMB 107,048 compared to the optimized access group and increase accessible PV capacity by 1.5751 MW. Therefore, the proposed plan for SOP and ESS planning in this paper can significantly reduce the economic cost of distribution networks, enhance the absorption capacity of distributed photovoltaics, improve the voltage level of power grid operation, and, thereby, improve the economic and reliability of distribution network operation. Full article

(This article belongs to the Topic Power System Dynamics and Stability)

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15 pages, 1179 KiB

Open AccessArticle

A Gray-Box Stability Analysis Method of Grid-Connected Inverter Considering Synchronization Dynamics

by Tianzhi Zheng, Fannie Kong, Guojin Li, Zhenmin Wang and Yanming Chen

Electronics 2023, 12(11), 2509; https://doi.org/10.3390/electronics12112509 - 02 Jun 2023

Cited by 1 | Viewed by 796

Abstract

The Grid-Connected Inverter (GCI) can be considered a gray box when circuit and controller parameters are missing due to intellectual property rights or parameter variations caused by aging, which poses an impediment to assessing the stability of the system. This paper presents a gray-box stability analysis method based on impedance identification of GCI considering the synchronization dynamics. The impedance frequency responses of GCI are measured by the frequency scanning method on the dq-frame. Meanwhile, the influence of synchronization dynamics and background harmonics is theoretically investigated. A vector fitting (VF) algorithm, co-designed with impedance identification, is then applied to generate polynomial transfer functions. Based on the obtained transfer functions, the stability of the GCI can be judged by the distance relationship between the prohibited area boundary and the center of the gershgorin-circle through the distance formula. Finally, the experiments of both RT-LAB and experimental prototypes are conducted to verify the feasibility of the proposed method. Full article

(This article belongs to the Topic Power System Dynamics and Stability)

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19 pages, 1981 KiB

Open AccessReview

Review of RoCoF Estimation Techniques for Low-Inertia Power Systems

by Xiaoyu Deng, Ruo Mo, Pengliang Wang, Junru Chen, Dongliang Nan and Muyang Liu

Energies 2023, 16(9), 3708; https://doi.org/10.3390/en16093708 - 26 Apr 2023

Cited by 4 | Viewed by 2655

Abstract

As the traditional generation is gradually replaced by inverter-based resources, a lack of rotational inertia is now a common issue of modern power systems, which leads to an increasingly larger rate of change of frequency (RoCoF) following contingencies and may result in frequency collapse. As a crucial index of the frequency security and stability of power systems, the accurate estimation of the RoCoF can be a foundation for the development of advanced operations and control techniques of the future power system. This paper firstly analyzes the role of the RoCoF in typical blackouts occurring in recent years and discusses the physical and numerical nature of the RoCoF; then, by introducing the frequency spatial distribution of the power system, the paper discusses the concept of the “center” RoCoF that can present the frequency security and stability of the entire system. The estimation and prediction techniques of the maximal power system RoCoF following a contingency and the existing real-time tracking techniques of the power system RoCoF are comprehensively reviewed. Finally, the open questions and related research topics of the RoCoF estimation are discussed. Full article

(This article belongs to the Topic Power System Dynamics and Stability)

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18 pages, 3935 KiB

Open AccessArticle

Circuit Breaker Fault Diagnosis Method Based on Coil Current Time Sequence Phase Trajectory Characteristics

by Yaqi Chen, Qiong Li, Yang Zou, Guohua Long, Nianping Yan and Ruixiang Fan

Processes 2023, 11(4), 1241; https://doi.org/10.3390/pr11041241 - 17 Apr 2023

Cited by 1 | Viewed by 927

Abstract

The traditional circuit breaker fault diagnosis method suffers from insufficient feature information extraction and is easily affected by abnormal signal acquisition. To address this, this paper introduces the phase space reconstruction algorithm to reconstruct the current signal for fault diagnosis based on phase trajectory features. The proposed method uses a first-order forward differencing method and mutual information method to process abnormal data and select the parameters of the reconstruction, then extract overall and local inflection point features to construct a fault feature set. The support vector machine algorithm-based model is trained and tested using actual samples, and the results show that the proposed method can adaptively sample anomalous signals, exhibit strong robustness, and significantly improve the accuracy of fault classification. Full article

(This article belongs to the Topic Power System Dynamics and Stability)

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17 pages, 2052 KiB

Open AccessArticle

Improved Repetitive Control for an LCL-Type Grid-Tied Inverter with Frequency Adaptive Capability in Microgrids

by Hongwei Zhang, Qiangsong Zhao, Shuanghong Wang and Xuebin Yue

Electronics 2023, 12(7), 1736; https://doi.org/10.3390/electronics12071736 - 05 Apr 2023

Viewed by 1322

Abstract

Repetitive control (RC), which can track any periodic signal with a known integer period with zero steady-state error, is widely used for current control of grid-tied inverters in microgrids. However, the inherent one fundamental period time delay, leads to poor dynamic performance. Furthermore, the performance of conventional RC (CRC) will degrade when operating at a high variation grid frequency. Therefore, this paper proposes a frequency adaptive improved RC (FA-IRC) for grid-tied inverters. The improved RC (IRC) consists of a repetitive controller with a modified internal model filter, plus a proportional controller. In comparison to the CRC, the IRC has a good dynamic response, because it provides a higher gain and a wider bandwidth at the resonant frequency. Moreover, to achieve the frequency adaptability of the IRC, a fractional delay, based on a finite impulse response (FIR) filter, is built into the IRC system, to ensure that the resonant frequency of the IRC is approximately equal to the actual grid frequency and harmonic frequency. Stability analysis and characteristic analysis of the FA-IRC system are reported in this paper. Simulations are conducted, to demonstrate the validity of the proposed method. Full article

(This article belongs to the Topic Power System Dynamics and Stability)

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Journal Name	Impact Factor	CiteScore	Launched Year	First Decision (median)	APC
Electricity electricity	-	-	2020	20.3 Days	CHF 1000
Electronics electronics	2.9	4.7	2012	15.6 Days	CHF 2400
Energies energies	3.2	5.5	2008	16.1 Days	CHF 2600
Mathematics mathematics	2.4	3.5	2013	16.9 Days	CHF 2600
Processes processes	3.5	4.7	2013	13.7 Days	CHF 2400

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