Review
Engineering, Electrical & Electronic
Ibrahim Alhurayyis, Ahmad Elkhateb, John Morrow
Summary: This paper presents a review of dc-dc power converter families in MVdc grids, focusing on isolated and nonisolated converters, as well as comparing other subfamilies in terms of specifications and characteristics. Additionally, the applications of these converters are provided with a focus on the essential requirements for each application.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Lin Zhu, Chushan Li, Huan Yang, Shengdao Ren, Shilei Zhang, Wuhua Li, Xiangning He
Summary: This article proposes a generalized buck-boost type high step-down converter (BHSC) structure to address the problem of a lower power circuit directly fed by MVDC. The BHSC structure offers high modularity, simple structure, and low cost, with the ability to achieve voltage balance.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Yu Dong, Weili Li, Qi Jia, Qianhao Sun
Summary: This article introduces a standalone clamping switched capacitor-based dc transformer (CSCDCT) for the medium-voltage de power grid. The CSCDCT has the functions of de fault isolation and online redundant design to ensure power distribution reliability. In addition, it achieves matching regulation of high-frequency ac voltages and voltage self-balance of dc capacitors, eliminating the coupling effect and improving the soft-switching performance and control stability of the system. The article thoroughly investigates the topology, operating mode, voltage matching modulation, current characteristic, switching performance, and power loss of the CSCDCT, and validates the analysis with experimental and simulation results.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Wensheng Song, Shuai Yin, Yaru Deng, Ming Zhong
Summary: By establishing the mathematical model of the resonant-tank root-mean-square (rms) current of the dual-bridge series resonant dc/dc converter (DBSRC), this article comparatively analyzes the performance of the DBSRC under asymmetric-phase shift (APS) control. The proposed steady-state performance optimization strategy minimizes the resonant tank rms current, extends the zero voltage switching (ZVS) range, eliminates the influence of the dead-time gap, and enhances the transmission efficiency of the DBSRC. The theoretical analysis and excellent performance of the steady-state optimization strategy are verified in this article.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Renfeng Guan, Zhixing He, Muxuan Xiao, Ruxin Liang, Yu Xiao, Zongjian Li, Lei Wang, An Luo
Summary: This article proposes a new medium voltage input multiport isolated output dc transformer topology with the challenges of power balancing control and fault isolation. The proposed topology has the features of voltage and current self-balancing, as well as limiting the short-circuit current in the output port. A prototype is built to verify its feasibility and it shows good prospects for power distribution systems.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Automation & Control Systems
Bangbang He, Wu Chen, Chun Zhang, Yubo Yuan, Chenyu Zhang
Summary: In this article, impedance specifications for the stability design of grid-connected dc distribution power systems are proposed, which can be used to constrain the admittance of voltage-source converters and the impedance of converter-based loads connected to the grid.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Zhenming Cai, Li Ren, Xiangyu Tan, Zheng Li, Ying Xu, Yuejin Tang, Jing Shi, Jingdong Li
Summary: This paper examines the evolution of short-circuit faults in typical MVDC SPS and proposes a SCLS topology with a superconducting coupled coil and two DCCBs. By establishing models on MATLAB/Simulink, the current limiting and current sharing principles of SCLS are verified, demonstrating effective current limiting performance and fault clearing effect.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2021)
Article
Engineering, Electrical & Electronic
Jinlei Chen, Wenlong Ming, Carlos E. Ugalde-Loo, Sheng Wang, Nick Jenkins
Summary: In this article, a small-signal model-based analysis is conducted to uncover the cause of dc voltage imbalance in cascaded 3L-NPC converters. Two voltage balancing methods are proposed, one based on PI controllers and the other based on inverse-droop control. Experimental validation demonstrates the effectiveness of both methods in balancing the dc voltages of SMs under changing load conditions and dc bus voltages.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Energy & Fuels
Chathan M. Cooke, Joshua Malone, Chryssostomos Chryssostomidis
Summary: There is increasing interest in medium-voltage direct current (MVDC) power systems due to their compatibility with DC loads and the ability to avoid AC frequency synchronization issues. However, there is currently limited experience and knowledge compared to medium-voltage alternating current (MVAC) systems. This study aims to harmonize MVAC standards to provide design and test values for shipboard MVDC cables and evaluate their impact on cable system sizes. It also identifies a tradeoff between cable insulation thickness and system size reduction, where reducing insulation thickness can lead to higher electric stresses within the insulation.
IEEE OPEN ACCESS JOURNAL OF POWER AND ENERGY
(2022)
Article
Engineering, Electrical & Electronic
Shanshan Zhao, Yu Chen, Shenghui Cui, Benedict Justin Mortimer, Rik W. De Doncker
Summary: This study proposes an operation scheme that enables fully independent three-port bidirectional operation of MMDC, expanding its application scope and simplifying the complexity of power flow control.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Energy & Fuels
Changxi Yue, Siyuan Liang, Jicheng Yu, Feng Zhou, Min Lei
Summary: This paper analyzes the technical specifications of voltage and current measurement apparatuses for MVDC systems and compares the adaptability of sensors. Through the construction of simulation models for testing, appropriate apparatuses are proposed for MVDC system measurements. The research results are significant for the research of sensors for MVDC systems and engineering applications.
Article
Energy & Fuels
Xiaolong Xiao, Jianhua Wang, Shuo Li, Shang Gao
Summary: This study introduces a simulation method for DC distribution system based on the average-value model (AVM), which replaces the switch to improve simulation efficiency, and constructs the corresponding system in PLECS software. The research shows that simulation based on AVM can effectively reflect the system's characteristics, improve simulation speed, and provide important reference for the stable operation of the system.
Article
Engineering, Electrical & Electronic
Xin Xiang, Yunjie Gu, Yang Qiao, Xiaotian Zhang, Wuhua Li, Xiangning He, Timothy C. Green
Summary: DC transformers based on power electronics are key items for MVDC distribution systems, allowing connections between different voltage DC links. This article presents the circuit evolution of high and low step-ratio RMMC, providing a wider variety of connection options for MVDC distribution systems.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Xianyong Feng, Qing Xiong, Angelo L. Gattozzi, Robert E. Hebner
Summary: This research investigates the advantages of medium voltage dc (MVDC) distribution systems in terms of power equipment weight, energy efficiency, and controllability, as well as their potential to reduce cable size and increase cable service life. The study also highlights the importance of understanding partial discharge mechanisms in medium voltage cables under both ac and dc conditions to prevent premature power equipment failure.
IEEE TRANSACTIONS ON POWER DELIVERY
(2021)
Review
Engineering, Electrical & Electronic
Luona Xu, Josep M. Guerrero, Abderezak Lashab, Baoze Wei, Najmeh Bazmohammadi, Juan C. Vasquez, Abdullah Abusorrah
Summary: DC shipboard microgrids (dc-SMGs) have many advantages compared with ac ones in terms of system efficiency, operation flexibility, component size, and fault protection performance. This article provides a comprehensive review of power architecture, functional blocks, and power converters in dc shipboard power systems.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Wandry R. Faria, Gregorio Munoz-Delgado, Javier Contreras, Benvindo R. Pereira Jr
Summary: This paper proposes a new bilevel mathematical model for competitive electricity markets, taking into account the participation of distribution systems operators. A new pricing method is introduced as an alternative to the inaccessible dual variables of the transmission system.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Chao Zhang, Liwei Zhang, Dong Wang, Kaiyuan Lu
Summary: The load disturbance rejection ability of electrical machine systems is crucial in many applications. Existing studies mainly focus on improving disturbance observers, but the speed response control during the transient also plays a significant role. This paper proposes a sliding mode disturbance observer-based load disturbance rejection control with an adaptive filter and a Smith predictor-based speed filter delay compensator to enhance the transient speed response.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Arif Hussain, Arif Mehdi, Chul-Hwan Kim
Summary: The proposed scheme in this research paper is a communication-less islanding detection system based on recurrent neural network (RNN) for hybrid distributed generator (DG) systems. The scheme demonstrates good performance in feature extraction, feature selection, and islanding detection, and it also performs effectively in noisy environments.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Zonghui Sun, Xizheng Guo, Shinan Wang, Xiaojie You
Summary: This paper presents a status pre-matching method (SPM) that eliminates the iterative calculations for resistance switch model, and simulates all operation modes of PECs through a more convenient approach. Furthermore, a FPGA implementation scheme is proposed to fully utilize the multiplier units of FPGA.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Rui Zhou, Shuheng Chen, Yang Han, Qunying Liu, Zhe Chen, Weihao Hu
Summary: In power system scheduling with variable renewable energy sources, considering both spatial and temporal correlations is a challenging task due to the complex intertwining of spatiotemporal characteristics and computational complexity caused by high dimensionality. This paper proposes a novel probabilistic spatiotemporal scenario generation (PSTSG) method that generates probabilistic scenarios accounting for spatial and temporal correlations simultaneously. The method incorporates Latin hypercube sampling, copula-importance sampling theory, and probability-based scenario reduction technique to efficiently capture the spatial and temporal correlation in the dynamic optimal power flow problem. Numerical simulations demonstrate the superiority of the proposed approach in terms of computational efficiency and accuracy compared to existing methods.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Juan Manuel Mauricio, J. Carlos Olives-Camps, Jose Maria Maza-Ortega, Antonio Gomez-Exposito
Summary: This paper proposes a simplified thermal model of VSC, which can produce accurate results at a low computational cost. The model consists of a simple first-order thermal dynamics system and two quadratic equations to model power losses. A methodology is also provided to derive the model parameters from manufacturer data.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Jae-Kyeong Kim, Kyeon Hur
Summary: This paper investigates the relationship between the accuracy of finite difference-based trajectory sensitivity (FDTS) analysis and the perturbation size in non-smooth systems. The study reveals that the approximation accuracy is significantly influenced by the perturbation size, and linear approximation is the most suitable method for practical applications.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Yuan Si, Amjad Anvari-Moghaddam
Summary: This paper investigates the impact of geomagnetic disturbances on small signal stability in power systems and proposes the installation of blocking devices to mitigate the negative effects. Quantitative evaluation reveals that intense geomagnetic disturbances significantly increase the risk of small signal instability. Optimal placement of blocking devices based on sensitivity scenarios results in a significant reduction in the risk index compared to constant and varying induced geoelectric fields scenarios.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Xuejian Zhang, Wenxin Kong, Nian Yu, Huang Chen, Tianyang Li, Enci Wang
Summary: The intensity estimation of geomagnetically induced currents (GICs) varies depending on the method used. The estimation using field magnetotelluric (MT) data provides the highest accuracy, followed by the estimation using 3D conductivity models and the estimation using a 1D conductivity model. The GICs in the North China 1000-kV power grid have reached a very high-risk level, with C3 and C4 having a significant impact on the geoelectric field and GICs.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Yue Pan, Shunjiang Lin, Weikun Liang, Xiangyong Feng, Xuan Sheng, Mingbo Liu
Summary: This paper introduces the concept and model of offshore-onshore regional integrated energy system, and proposes a stochastic optimal dispatch model and an improved state-space approximate dynamic programming algorithm to solve the model. The case study demonstrates the effectiveness and high efficiency of the proposed method in improving economic and environmental benefits.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Mohammad Eydi, Reza Ghazi, Majid Oloomi Buygi
Summary: Proportional current sharing, voltage restoration, and SOCs balancing in DC microgrid control algorithms are the leading challenges. This paper proposes a novel communication-less control method using a capacitor and a DC/DC converter to stabilize the system and restore the DC bus voltage. The method includes injecting an AC signal into the DC bus, setting the current of energy storage units based on frequency and SOC, and incorporating droop control for system stability. Stability analysis and simulation results validate the effectiveness of the proposed method.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Xiangjian Meng, Xinyu Shi, Weiqi Wang, Yumin Zhang, Feng Gao
Summary: With the increasing penetration of photovoltaic power generation, regional power forecasting becomes critical for stable and economical operation of power systems. This paper proposes a minute-level regional PV power forecasting scheme using selected reference PV plants. The challenges include the lack of complete historical power data and the heavy computation burden. The proposed method incorporates a novel reference PV plant selection method and a flexible approach to decrease the accumulated error of rolling forecasting.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Huabo Shi, Yuhong Wang, Xinwei Sun, Gang Chen, Lijie Ding, Pengyu Pan, Qi Zeng
Summary: This article investigates the dynamic stability characteristics of the full size converter variable speed pumped storage unit and proposes improvements for the control strategy. The research is important for ensuring the safe and efficient operation of the unit.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Firmansyah Nur Budiman, Makbul A. M. Ramli, Houssem R. E. H. Bouchekara, Ahmad H. Milyani
Summary: This paper proposes an optimal harmonic power flow framework for the daily scheduling of a grid-connected microgrid, which addresses power quality issues and ensures effective control through demand side management.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Cong Zeng, Ziyu Chen, Jizhong Zhu, Fellew Ieee
Summary: This paper introduces a distributed solution method for the multi-objective OPF problem, using a coevolutionary multi-objective evolutionary algorithm and the idea of decomposition. The problem is alleviated by decomposing decision variables and objective functions, and a new distributed fitness evaluation method is proposed. The experimental results demonstrate the effectiveness of the method and its excellence in large-scale systems.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)