Article
Engineering, Electrical & Electronic
Debargha Brahma, Nilanjan Senroy
Summary: This letter proposes a numerically-based method for estimating the metrics of dynamic grid flexibility, such as the inertial index and the flexibility index. The method uses matrix perturbation theory to quantitatively determine the system's sensitivity to any perturbation. It is applied to power system scenarios under small disturbances, allowing for direct calculation of the inertial and flexibility indices from the system matrix. The proposed method is immune to modeling complexities and provides implicit understanding of the impact of any used generator or controller model.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2022)
Article
Engineering, Electrical & Electronic
Subhash Lakshminarayana, Sondipon Adhikari, Carsten Maple
Summary: Recent research has highlighted the potential serious impact of IoT-based load altering attacks on power grid operations, and proposed an analytical framework to investigate the dynamic response of the power grid to such attacks. By utilizing results from second-order dynamical systems, victim nodes that lead to the most destabilizing DLAAs have been successfully identified.
IEEE TRANSACTIONS ON SMART GRID
(2021)
Article
Engineering, Electrical & Electronic
Indla Rajitha Sai Priyamvada, Sarasij Das, Balarko Chaudhuri
Summary: This paper quantifies the interactions between the oscillation modes of Converter Interfaced Generators (CIG) and electromechanical oscillation modes of Synchronous Generators (SGs) using an extended eigenvalue sensitivity analysis. The interactions were measured using proposed interaction coefficients and their impacts on the system stability were determined. The results showed that the interactions between the CIG oscillation modes and the SG electromechanical modes led to reduced damping of oscillations in the SG states. Possible applications of the proposed interaction coefficients were identified, and the effects of PLL parameters on the interactions among the oscillation modes were investigated.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2023)
Article
Nuclear Science & Technology
Vito Vitali, Florent Chevallier, Alexis Jinaphanh, Patrick Blaise, Andrea Zoia
Summary: Matrix-filling Monte Carlo methods are used to estimate higher-order k- and alpha-eigenmodes and eigenvalues, with a novel approach developed in TRIPOLI-4 (R) to solve the alpha-eigenvalue problem. The behavior of eigenpairs in the presence of decoupling factors is illustrated, emphasizing eigenvalue separation.
ANNALS OF NUCLEAR ENERGY
(2021)
Article
Computer Science, Information Systems
Dinesh Shetty, Nagesh Prabhu
Summary: Identifying and damping low-frequency oscillations are crucial in power systems for small signal stability. Data-driven methods are used to estimate system models and design damping controllers, showing high accuracy and efficiency in identifying LFO modes, especially with wavelet based denoising techniques.
Article
Engineering, Electrical & Electronic
Peijie Li, Yucheng Wei, Junjian Qi, Xiaoqing Bai, Hua Wei
Summary: This paper proposes a closed-form formulation for eigenvalue sensitivities based on matrix calculus, which can enhance the accuracy and efficiency of stability analysis in power systems with converter-based generators.
JOURNAL OF MODERN POWER SYSTEMS AND CLEAN ENERGY
(2021)
Review
Engineering, Electrical & Electronic
Bendong Tan, Junbo Zhao, Marcos Netto, Venkat Krishnan, Vladimir Terzija, Yingchen Zhang
Summary: This paper comprehensively summarizes inertia definitions and estimation methods for synchronous generators and converter-interfaced generation, categorizing them into model-based and measurement-based approaches. A framework to quantify the virtual inertia of CIGs is provided for the first time, addressing an open problem in the literature. Future directions for inertia estimation are identified, which can benefit the design of control and protection schemes for a more reliable and secure power system.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2022)
Article
Engineering, Marine
Jiaqi Han, Zhen Wang
Summary: A new method based on perturbation method and Fredholm theory is proposed in this study to analytically solve the eigenvalues and eigenfunctions of nonuniform Euler-Bernoulli beam vibration. The study considers the variation of tension in vertical marine riser from top to bottom caused by gravity effect and provides the eigenvalues and eigenfunctions under boundary conditions. The effectiveness of the new method based on perturbation method is verified by comparing the asymptotic analytical results with classical results. The influence of the change of the bottom tension on the perturbation method is analyzed, and the results show that the new method provides better accuracy for higher order natural frequency.
Article
Computer Science, Information Systems
Ioannis Krikidis, Constantinos Psomas, Symeon Chatzinotas
Summary: This letter investigates the employment of vector-perturbation (VP) precoding to convey simultaneously information and energy in multiple-user multiple-input single-output (MU-MISO) downlink channel. The conventional VP not only provides information capacity benefits to linear channel inversion techniques but also enhances the harvested energy at the receivers due to the extended symbol constellation. To further improve harvesting performance, a modified VP technique named VP-EH is proposed, which designs the VP integer offsets to maximize the delivered power. The proposed scheme incorporates an integer least square problem and a Rayleigh quotient optimization problem to find the closest lattice point. Finally, a convex combination between conventional VP and VP-EH is proposed to achieve a trade-off between maximizing information or energy.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Xinyu Hou, Yugang Su, Zhiping Zuo, Xin Dai, Yingjun Fei
Summary: A novel analysis method based on the quadratic eigenvalue problem (QEP) has been proposed to simplify the analysis process of the multirelay magnetic coupling wireless power transfer system. The effect of load resistance on eigenvalues and the relationships between eigenvalues and key frequencies have been discussed. The experimental results confirm the theoretical analysis.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Chemical
Aldo Barrueto Guzman, Hector Chavez Orostica, Karina A. Barbosa
Summary: This paper focuses on a comprehensive stability study of a two-area power system with wind power integration and synthetic inertia control, considering the effects of varying the interconnection link. Simulations show that local optimal feedback gains can be found, preserving the stability of the global system under significant variations in the interconnection link. The results highlight the benefits of synthetic inertia control, particularly in low-inertia situations.
Article
Engineering, Electrical & Electronic
Yue Zhu, Yunjie Gu, Yitong Li, Timothy Green
Summary: This paper introduces a grey-box approach for analyzing the small-signal stability of complex power systems. This approach allows for root-cause tracing without disclosing the full details of the internal control structure. The paper proposes the impedance participation factor and establishes its relationship with eigenvalue sensitivity.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2022)
Article
Engineering, Electrical & Electronic
Mohammad Pirani, Joshua A. Taylor
Summary: The study demonstrates that adding DC lines linking node pairs with large effective reactance in the AC network can maximize the average controllability represented by the trace of the controllability Gramian.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2021)
Article
Mathematics, Applied
Davide Buoso, Carles Falco, Maria Del Mar Gonzalez, Manuel Miranda
Summary: This study investigates the bulk-boundary eigenvalue problem for the Bilaplacian with a special third order boundary condition related to dynamical boundary conditions for the Cahn-Hilliard equation. It explores continuity properties under parameter variation and analyzes the eigenvalues in different geometries, leading to the discovery of a bifurcation from zero eigenvalue in the annulus case depending on its size.
DISCRETE AND CONTINUOUS DYNAMICAL SYSTEMS
(2022)
Article
Engineering, Multidisciplinary
Leilei Cao, Yan Gu, Chuanzeng Zhang, Qing-Hua Qin
Summary: This paper presents a meshless Chebyshev collocation method (CCM) for solving the eigenvalue problems of the Helmholtz equation, utilizing Chebyshev polynomials for accurate approximation of eigenfunctions to ensure pseudo-spectral convergence. Two approaches, the generalized eigenvalue approach and the standard eigenvalue approach, are implemented to convert the original eigenvalue problem into the generalized and standard forms, respectively. Five benchmark numerical examples are used to demonstrate the accuracy and efficiency of the proposed CCM.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2021)
Article
Engineering, Electrical & Electronic
Rafat Aljarrah, Hesamoddin Marzooghi, James Yu, Vladimir Terzija
Summary: This paper presents a novel method for quantifying fault level in future grid scenarios with various penetrations of power electronics-connected renewable energy sources. The proposed method focuses on steady-state fault level calculation without the need for detailed system modelling and time-domain simulations, allowing assessment of system fault level for large numbers of scenarios. Simulation results demonstrate the efficacy of the proposed methodology for various penetration levels of power electronics-based RESs.
IET GENERATION TRANSMISSION & DISTRIBUTION
(2021)
Article
Engineering, Electrical & Electronic
Mohsen Zare, Mohammad Rasoul Narimani, Mostafa Malekpour, Rasoul Azizipanah-Abarghooee, Vladimir Terzija
Summary: The multi-area economic dispatch (MAED) is crucial in determining generation dispatch strategy and meeting load demands in an interconnected power system. An improved version of fireworks algorithm is deployed to handle the multi-constraints MADED problem, with a new constraint handling scheme developed to correct potential solutions within feasible search space.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2021)
Article
Engineering, Electrical & Electronic
Jan Shair, Xiaorong Xie, Yunhong Li, Vladimir Terzija
Summary: Several incidents of subsynchronous control interaction (SSCI) have occurred in large-scale grid-interfaced doubly-fed induction generator (DFIG) based wind farms in the past decade. This paper validates the performance of a practical rotor-side subsynchronous damping controller (RSDC) through controller hardware-in-the-loop (CHIL) simulations and real-world DFIG tests, demonstrating its ability to suppress SSCI and enhance confidence in the mitigation strategy based on converter control modifications.
IEEE TRANSACTIONS ON POWER DELIVERY
(2021)
Article
Engineering, Electrical & Electronic
Junbo Zhao, Marcos Netto, Zhenyu Huang, Samson Shenglong Yu, Antonio Gomez-Exposito, Shaobu Wang, Innocent Kamwa, Shahrokh Akhlaghi, Lamine Mili, Vladimir Terzija, A. P. Sakis Meliopoulos, Bikash Pal, Abhinav Kumar Singh, Ali Abur, Tianshu Bi, Alireza Rouhani
Summary: Power system dynamic state estimation (DSE) plays an important role in enhancing the operational robustness and resilience of power systems. The advantages of DSE compared to static state estimation are discussed with examples demonstrating its benefits in improving the reliability and resiliency of power systems through time critical applications.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2021)
Article
Green & Sustainable Science & Technology
Weiyu Bao, Qiuwei Wu, Lei Ding, Sheng Huang, Vladimir Terzija
Summary: This paper proposes a hierarchical inertial control scheme to coordinate multiple WFs with different wind speed conditions, achieving effective results in system frequency response and reducing operational costs.
IEEE TRANSACTIONS ON SUSTAINABLE ENERGY
(2021)
Article
Engineering, Electrical & Electronic
Sadegh Azizi, Mohammad Rezaei Jegarluei, Ahmad Salehi Dobakhshari, Gaoyuan Liu, Vladimir Terzija
Summary: This paper presents a novel method for LoG localization and size estimation using bus impedance matrix and vector measurements. The method does not require specific measurements and is suitable for real-time applications. Extensive simulations show its effectiveness and superiority over existing methods.
IEEE TRANSACTIONS ON POWER DELIVERY
(2021)
Article
Engineering, Electrical & Electronic
Amirhossein Sajadi, Luka Strezoski, Amin Khodaei, Kenneth Loparo, Mahmoud Fotuhi-Firuzabad, Robin Preece, Meng Yue, Fei Ding, Victor Levi, Pablo Arboleya, Vladimir Terzija
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2021)
Article
Automation & Control Systems
Shuning Gao, Haoran Zhao, Yonghao Gui, Dao Zhou, Vladimir Terzija, Frede Blaabjerg
Summary: This article introduces a voltage-modulated direct power control (VM-DPC) method with an additional parallel compensator for the doubly fed induction generator under unbalanced grid conditions. The method ensures satisfying steady-state performance and regulating property of negative-sequence output currents, which are verified through simulations and experimental prototype evaluation.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Qiteng Hong, Liang Ji, Steven M. Blair, Dimitrios Tzelepis, Mazaher Karimi, Vladimir Terzija, Campbell D. Booth
Summary: This paper presents a novel load shedding scheme that considers the active power ramping capability of Distributed Energy Resources (DERs) to address challenges in microgrids caused by low inertia and diverse types of DERs. The proposed scheme takes into account not only the DERs' reserve power but also their speed in injecting active power into the system, ensuring that critical frequency thresholds are not violated. Tested using a realistic real-time hardware-in-the-loop arrangement, the results demonstrate that the proposed scheme effectively detects slow DER responses and triggers necessary load shedding actions to maintain frequency below critical thresholds.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2022)
Article
Engineering, Electrical & Electronic
Yu Liu, Abhinav Kumar Singh, Junbo Zhao, A. P. Sakis Meliopoulos, Bikash Pal, Mohd Aifaa bin Mohd Ariff, Thierry Van Cutsem, Mevludin Glavic, Zhenyu Huang, Innocent Kamwa, Lamine Mili, Abdul Saleem Mir, Ahmad Taha, Vladimir Terzija, Shenglong Yu
Summary: This paper focuses on the role of dynamic state estimation (DSE) in control and protection applications in power systems, demonstrating how DSE can effectively address challenges in modern power systems.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2021)
Article
Engineering, Electrical & Electronic
Dragan Cetenovic, Aleksandar Rankovic, Junbo Zhao, Zhaoyang Jin, Jianzhong Wu, Vladimir Terzija
Summary: This study introduces a new adaptive method that adjusts the process noise covariance matrix to adapt to the level of state changes, and utilizes normalized innovations to track the level of state changes. The proposed method achieves better accuracy and robustness in distribution systems.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2021)
Proceedings Paper
Green & Sustainable Science & Technology
Papiya Dattaray, Peter Wall, Vladimir Terzija
Summary: Wind power technology has grown rapidly, but the importance of battery energy storage systems (BESSs) in collaboration with wind farms is increasing. Using compensating AC lines for long distance power transmission in remote wind resource areas is a cost-effective solution. However, the interaction between wind turbines and fixed series compensation may lead to dangerous voltages and currents, causing plant disconnection, therefore impacting system security.
2021 IEEE MADRID POWERTECH
(2021)
Article
Engineering, Electrical & Electronic
A. S. Dobakhshari, M. Abdolmaleki, V Terzija, S. Azizi
Summary: This paper introduces a novel method for real-time estimation of transmission line and transformer parameters using measurements provided by SCADA system, avoiding the disadvantages of traditional iterative methods, and achieving successful simulation results.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2021)