Article
Automation & Control Systems
Jian Guo, Yandong Chen, Shuhan Liao, Wenhua Wu, Xiangyu Wang, Josep M. Guerrero
Summary: This article investigates the dynamic interactions between the VSM-based rectifier station, inverter station, and the grid in high voltage dc systems. The hybrid ac-dc impedance models of VSMs considering the coupling between ac and dc dynamics are established. The relationships between the dc impedance, dq-frame impedance, and the hybrid ac-dc impedance are presented, and a five-dimensional impedance stability criterion is proposed.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
J. Pedra, L. Sainz, Ll. Monjo
Summary: This paper reviews and compares the main DFIG models for stability assessment and proposes a detailed study on small-signal admittance-based modeling for stability analysis. The study shows that using the complete model at low frequencies is necessary for accurately assessing subsynchronous stability.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2023)
Article
Engineering, Electrical & Electronic
Adedotun J. Agbemuko, Jose Luis Dominguez-Garcia, Oriol Gomis-Bellmunt, Lennart Harnefors
Summary: This paper proposes an intuitive modification of VSC control based on physical considerations and dynamics of existing control, significantly improving active power capability by eliminating the impacts of influential variables. The basic structure of the VSC is maintained while effectively reshaping its output impedance. The proposed modification is validated through nonlinear time-domain simulations, demonstrating the simplicity and intuitiveness of the modified structure.
IEEE TRANSACTIONS ON POWER DELIVERY
(2021)
Article
Engineering, Electrical & Electronic
Haitao Zhang, Mahmoud Mehrabankhomartash, Maryam Saeedifard, Xiuli Wang, Xifan Wang
Summary: This study proposes a new zone aggregation method for assessing the stability of expanded DC distribution networks. The main advantages of this new method include utilizing impedance information from converter-connected nodes only and assessing stability with a minimum number of nodes.
IEEE TRANSACTIONS ON POWER DELIVERY
(2021)
Article
Automation & Control Systems
Haitao Zhang, Mahmoud Mehrabankhomartash, Maryam Saeedifard, Yuntao Zou, Yongqing Meng, Xiuli Wang
Summary: Stability analysis of point-to-point HVdc transmission systems is crucial for planning and operation, but obtaining detailed information of converters can be challenging. This article introduces a hybrid ac-dc impedance model and a new network partitioning method to assess stability without requiring detailed converter information. The proposed method does not rely on the number of right half-plane poles and solely depends on the converter itself.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Computer Science, Information Systems
Yibo Zhang, Xu Tian, Cong Wang, Hong Cheng
Summary: This paper analyzes the sub-/super-synchronous interaction between VSC-HVDC and PMSG-based wind farms, focusing on the impacts of VSC-HVDC bandwidths, wind converter PLL bandwidth, and AC line impedance on system stability. The study shows that the magnitude in the q-axes impedance interaction is the essential factor for system instability, and system stability is more sensitive to the HVDC bandwidths than the wind converter PLL bandwidth. Simulation results confirm the theoretical conclusions.
Article
Engineering, Electrical & Electronic
Shan Jiang, Ye Zhu, Georgios Konstantinou
Summary: This study proposes a new settling-angle-based stability criterion for analyzing nonminimum phase power systems with multiple current-controlled converters. By comparing the settling angles of the system and its subsystems, the stability of the system can be accurately assessed and resonance sources identified.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Zhaosen Chai, Hui Li, Xiangjie Xie, Mohamed Abdeen, Tian Yang, Kun Wang
Summary: This study proposes an output impedance model for a VSynC-based DFIG to analyze grid connected stability in weak grids, providing a comprehensive investigation into low-frequency characteristics and vital unstable factors of the system. The proposed model is validated through various methods and proven effective and accurate.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2021)
Article
Materials Science, Multidisciplinary
S. Akter, A. Ahad, M. K. Das, M. A. Taher, A. Barik, F. Alam, M. N. Khan
Summary: The Ba1-xZrxTi0.98Y0.02O3 ceramics were prepared using a solid-state reaction process, and their structural, dielectric, and electrical properties were investigated. With the increase in Zr content, lattice parameters and particle size increase, while dielectric constant and dielectric loss decrease.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Green & Sustainable Science & Technology
Yuxia Jiang, Yanjun Tian, Yonggang Li, Fei Wang
Summary: BTB converters, consisting of an AC/DC rectifier and a DC/AC inverter, commonly used for power system interconnections. A proposed DC-link current compensation control scheme reduces disturbances, improves stability, and enhances controllability of the system. Experimental validation has confirmed the effectiveness of the proposed scheme in improving system resilience to disturbances.
IET RENEWABLE POWER GENERATION
(2021)
Article
Automation & Control Systems
Adedotun J. Agbemuko, Jose Luis Dominguez-Garcia, Oriol Gomis-Bellmunt
Summary: An interconnection of independently designed voltage source converters (VSCs) and their control in high voltage DC grids can lead to network-level detrimental interactions and instability, but robust network-level global controllers are proposed in this paper to decouple interacting VSCs through impedance shaping technique without needing to establish the internal controller structure of any VSC. The global controllers rely on externally measurable feedback impedance of each VSC and can be shaped through robust convex optimization to obtain a decoupled network, as demonstrated through nonlinear simulations of the physical model.
CONTROL ENGINEERING PRACTICE
(2022)
Article
Energy & Fuels
Zhaoyan Zhang, Yong Zhuang, Xianbao Zha, Kun Zhang, Peiguang Wang, Shaoke Wang, Shuai Liu
Summary: This paper proposes a stability analysis method based on the DFIG output impedance model combined with an adaptive control method. The proposed control method improves the quality of grid-connected current, enhancing the stability of the system. Experimental verification demonstrates the effectiveness of the proposed approach.
Article
Energy & Fuels
Haipeng Lv, Xiwang Abuduwayiti, Lingpeng Meng, Cunjin Shi
Summary: An active power control strategy for the receiving-end converter station of VSC-HVDC has been proposed in this study, which efficiently suppresses low-frequency oscillation of the island power system. The simulation results reflect a stronger oscillation suppression ability of the proposed control strategy.
FRONTIERS IN ENERGY RESEARCH
(2021)
Article
Engineering, Electrical & Electronic
Zequan Cao, Xiaoliang Dong, Sile Hu, Sam S. Yu, Bin Liu, Zhen Li, Xiangdong Liu
Summary: This study focuses on the oscillation issues of a gird-connected offshore wind farm through VSC-HVDC. A detailed impedance model is established, and an oscillation suppression method based on intelligent impedance optimization is proposed. The accuracy and effectiveness of the proposed methods are validated through simulations.
INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS
(2022)
Article
Computer Science, Interdisciplinary Applications
Yixuan Wang, Nuo Wang, Peixiu Han
Summary: This study proposes a model that integrates island supply chain network design and periodic freight demand, and develops a bi-level parallel genetic algorithm to solve this model. The results of the numerical analysis demonstrate the effectiveness of this approach, and a sensitivity analysis is conducted to understand the impact of different parameters on the total cost.
COMPUTERS & OPERATIONS RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
Leming Zhou, Siyi Liu, Yandong Chen, Weilang Yi, Shuke Wang, Xiaoping Zhou, Wenhua Wu, Jie Zhou, Chan Xiao, Aoyang Liu
Summary: A coordinated suppression method for harmonic current and inrush fault current is proposed for virtual synchronous generators, utilizing passive and active branches along with improved VSG control to achieve effective suppression of both types of currents. The method successfully resolves the contradiction between harmonic current suppression and inrush fault current limitation, as validated by experimental results.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Lerong Hong, Xiaoping Zhou, Yifeng Liu, Haitao Xia, Hanhang Yin, Yandong Chen, Leming Zhou, Qianming Xu
Summary: This paper investigates the mechanism and influencing factors of repetitive commutation failure caused by controller interaction in LCC-HVDC system. It identifies the causes of this failure and proposes an improved control method to enhance recovery performance.
IEEE TRANSACTIONS ON POWER DELIVERY
(2021)
Article
Engineering, Electrical & Electronic
HanHang Yin, Xiaoping Zhou, Yifeng Liu, Haitao Xia, Lerong Hong, Renlong Zhu, Lingfeng Deng
Summary: This study established the linearized model of HMIDC, analyzed its interaction mechanism, and proposed a control scheme to enhance voltage stability.
IEEE TRANSACTIONS ON POWER DELIVERY
(2022)
Article
Engineering, Electrical & Electronic
Wei Tian, Shuhan Liao, Lei Wang, Xiaoping Zhou, Qianming Xu
Summary: This article proposes an adaptive broadband full-bridge converter impedance matching network for load impedance matching of power amplifiers. The principles of operation, control method, and parameter design method are introduced. The simulation and experimental results validate the effectiveness of the proposed method and show improved power amplifier power utilization factor.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Zili Wang, Yandong Chen, Xueping Li, Yuancan Xu, Wenhua Wu, Shuhan Liao, Haining Wang, Shixiang Cao
Summary: This paper proposes an adaptive harmonic impedance reshaping method based on a consensus algorithm, which can achieve accurate harmonic sharing and improve voltage quality in microgrids with complex feeder networks and variable structures.
IEEE TRANSACTIONS ON SMART GRID
(2022)
Article
Automation & Control Systems
Jian Guo, Yandong Chen, Shuhan Liao, Wenhua Wu, Xiangyu Wang, Josep M. Guerrero
Summary: This article investigates the dynamic interactions between the VSM-based rectifier station, inverter station, and the grid in high voltage dc systems. The hybrid ac-dc impedance models of VSMs considering the coupling between ac and dc dynamics are established. The relationships between the dc impedance, dq-frame impedance, and the hybrid ac-dc impedance are presented, and a five-dimensional impedance stability criterion is proposed.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Automation & Control Systems
Jian Guo, Yandong Chen, Shuhan Liao, Wenhua Wu, Leming Zhou, Zhiwei Xie, Xiangyu Wang
Summary: This article investigates the instability problem caused by the interaction dynamics between the source-side virtual synchronous machine (VSG) and the load-side virtual synchronous machine (LVSM) in microgrids. The proposed inductor current feedforward control and additional voltage feedback control reshape the impedance of VSG, mitigating the low-frequency interaction between VSG and LVSM.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Difan Zhu, Ling Yang, Juntao Huang
Summary: This paper proposes a strategy for frequency coordination and second harmonic current suppression based on composite virtual impedance, which utilizes the advantages of battery and supercapacitor in different frequency ranges to effectively control and optimize the hybrid energy storage system.
IET POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Leming Zhou, Weilang Yi, Zhixing He, Yandong Chen, Tao Zhang, Qianming Xu, Xiaoping Zhou, Wenhua Wu
Summary: The paper proposes a high overload power supply system and its energy synchronization control method, which can provide three times the rated capacity under short-term overload conditions and achieve multiple times power supply through three energy supply channels. Experimental results verify the effectiveness of this system and control method.
IEEE TRANSACTIONS ON SMART GRID
(2022)
Article
Automation & Control Systems
Zhiwei Xie, Wenhua Wu, Yandong Chen, Josep M. Guerrero
Summary: This study discovers a time-varying phenomenon in the admittance characteristic of grid-connected inverters, termed as the pseudo-time variation. The current frequency-coupling admittance measurement method does not consider the influence of frequency coupling, resulting in confusing time-varying measurement results. To accurately measure the admittance characteristic, a phase correction method is proposed and verified through experiments.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Zili Wang, Yandong Chen, Xueping Li, Shuhan Liao, Yuancan Xu, Wenhua Wu, Haining Wang, Shixiang Cao
Summary: In this paper, an impedance-based adaptively reshaping method is proposed to improve the performance of distributed generation units in terms of harmonics sharing and voltage quality. The method enhances nonlinear load sharing and voltage quality by adjusting the harmonic impedance reshaping factor, while avoiding introducing additional virtual harmonic impedance.
IEEE TRANSACTIONS ON SMART GRID
(2022)
Article
Engineering, Electrical & Electronic
Lerong Hong, Xiaoping Zhou, Haitao Xia, Yifeng Liu, Renlong Zhu, Yandong Chen
Summary: This paper investigates the commutation failure caused by electromagnetic coupling between adjacent lines in LCC-HVDC projects, and proposes prevention strategies. The influencing factors and coupling characteristics under fault conditions are analyzed using modeling and traveling wave theory. The mechanism of commutation failure is explored considering different fault conditions, line structures, and system operation modes, and prevention strategies are proposed.
IEEE TRANSACTIONS ON POWER DELIVERY
(2022)
Article
Thermodynamics
Si-Zhe Chen, Zikang Liang, Haoliang Yuan, Ling Yang, Fangyuan Xu, Yuanliang Fan
Summary: This study proposes a SOH estimation method for lithium-ion batteries based on partial CV charging phase data and a convolutional neural network (CNN). By analyzing the current profile trend and utilizing differential current data as input, it achieves highly accurate estimation of SOH. The CNN-based framework automatically extracts features and the transfer learning strategy improves the model's generalization.
