Article
Automation & Control Systems
Yongxin Xiong, Wei Yao, Yahan Yao, Jiakun Fang, Xiaomeng Ai, Jinyu Wen, Shijie Cheng
Summary: This article proposes a distributed cooperative control (DCC) scheme for offshore wind farms integrated via a multiterminal direct current system, aiming to provide fast frequency support. The DCC scheme utilizes a consensus algorithm to distribute the frequency support burden among offshore wind turbines (WTs) effectively. It ensures adequate utilization of the kinetic energy of all WTs and enhances security through the use of consensus state index and adaptive change of droop control coefficients. The article also introduces an asymptotic recovery scheme to restore smooth rotor speed after frequency support, with other WTs following the leader for recovery and reduction of the second frequency drop. Moreover, a communication-free estimator is employed to estimate the onshore dc voltage using offshore local measured signals for fast frequency support. Case studies are conducted on MATLAB and OPAL-RT real-time simulation platforms to assess the performance of the proposed DCC scheme considering parameter uncertainty and noise disturbance.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Yongxin Xiong, Wei Yao, Jianfeng Wen, Siqi Lin, Xiaomeng Ai, Jiakun Fang, Jinyu Wen, Shijie Cheng
Summary: This paper proposes a two-level combined control scheme for voltage source converter-based multi-terminal high-voltage direct current integrated offshore wind farms to provide frequency support for the onshore system and reduce the second frequency drop. The scheme includes adaptive control at the wind turbine level and communication-free allocation control at the onshore VSC station level. Simulation results demonstrate the effectiveness and universality of the proposed scheme under different scenarios.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2021)
Article
Engineering, Electrical & Electronic
Xiuxing Yin, Xiaowei Zhao
Summary: This paper introduces a data-driven control approach for maximizing the total power generation of offshore wind farm using the recently developed learning model predictive control (LMPC) algorithm. The strategy focuses on reducing wake interactions among wind turbines to increase power production, showing a 15% improvement over traditional MPC methods.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2021)
Article
Green & Sustainable Science & Technology
Zuan Zhang, Xiaowei Zhao
Summary: This paper proposes a coordinated control strategy for HVDC grid integrated offshore wind farms to damp power system oscillations. The strategy utilizes the DC-link capacitor energy of offshore wind turbines to reduce interactions between power oscillations and HVDC grid voltage. Unlike previous communication-based methods, this strategy relies on local measurements of the HVDC grid voltage from offshore wind turbines. Simulation results confirm the effectiveness of this proposed strategy in improving power oscillation damping (POD) without the negative impact of communication delay.
IEEE TRANSACTIONS ON SUSTAINABLE ENERGY
(2023)
Article
Engineering, Multidisciplinary
Guan-Liang Lu, Chung-Han Lin, Yuan-Kang Wu
Summary: This paper compares the frequency support control methods for HVdc-connected offshore wind farms, mainly based on communication-based and coordination-based approaches. The study includes synthetic inertial control and the release of energy stored in capacitors in the HVdc system.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2021)
Article
Green & Sustainable Science & Technology
Zuan Zhang, Xiaowei Zhao
Summary: This paper proposes a novel coordinated control strategy for a voltage source converter (VSC) based high-voltage direct current (HVDC) grid integrated offshore wind farms (OWFs) to damp the power system oscillations. A modified IEEE 39-bus power system with a 5-terminal VSC-HVDC grid connected to two OWFs has been developed to validate the effectiveness of this proposed strategy. Both the eigenvalue analysis and time-domain simulation results indicate that this strategy can significantly improve the power oscillation damping (POD).
IEEE TRANSACTIONS ON SUSTAINABLE ENERGY
(2023)
Article
Engineering, Electrical & Electronic
Haiyu Zhao, Hongyu Zhou, Wei Yao, Qihang Zong, Jinyu Wen
Summary: In this paper, a Multi-stage Sequential Network Energy Control (MSNEC) is proposed for offshore AC asymmetric fault ride-through. Simulation results verify the effectiveness and economy of the proposed method.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2023)
Article
Engineering, Electrical & Electronic
Yong Li, Xuebo Qiao, Chun Chen, Yi Tan, Wenchao Tian, Qiuping Xia, Yijia Cao, Kwang Y. Lee
Summary: This study proposes an integrated planning model for OWFs integrated into the AC system through VSC-HVDC links, aiming to optimize the siting and sizing of OWFs, improve the voltage profile, and reduce the adverse influence of reactive power, thus minimizing total investment costs, operation costs, and maintenance costs.
JOURNAL OF MODERN POWER SYSTEMS AND CLEAN ENERGY
(2021)
Article
Engineering, Electrical & Electronic
Yongxin Xiong, Wei Yao, Zhongtuo Shi, Jiakun Fang, Xiaomeng Ai, Jinyu Wen, Shijie Cheng
Summary: This paper presents an adaptive dual droop control (ADDC) scheme that enables onshore systems to provide fast frequency support to disturbed onshore systems and voltage source converter-based multi-terminal direct current (VSC-MTDC) integrated offshore wind farms (OWFs). The proposed scheme detects disturbed and undisturbed systems and facilitates more frequency support power from undisturbed onshore systems, while ensuring safe operation by regulating the droop coefficients. Additionally, the offshore stations estimate onshore DC voltage as a control signal for fast frequency support, and the OWFs recover rotor speed with an asymptotic control scheme to reduce frequency drops.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2023)
Article
Engineering, Electrical & Electronic
Wu Liao, Qiuwei Wu, Hesong Cui, Sheng Huang, Yusheng Gong, Bin Zhou
Summary: A coordinated voltage control strategy based on model predictive control (MPC) is proposed for offshore radial DC-connected wind farms in this study. The strategy consists of two control modes. In the economic operation mode, the wind farm controller minimizes power losses and ensures voltage feasibility while tracking power references. In the voltage control mode, the main objective is to minimize voltage deviations from the rated voltage. The proposed strategy is demonstrated using a DC-connected wind farm with 20 wind turbines.
JOURNAL OF MODERN POWER SYSTEMS AND CLEAN ENERGY
(2023)
Article
Energy & Fuels
Matheus Sene Paulo, Andrei de Oliveira Almeida, Pedro Machado de Almeida, Pedro Gomes Barbosa
Summary: This work proposes a control strategy for integrating an offshore wind farm into the onshore electrical grid using a high-voltage dc transmission system based on modular multilevel converters. The algorithm allows the system to operate in grid-connected or stand-alone modes, with the second case supplying power to local loads. Mathematical models were developed for each operation mode and used to design the converter's controllers. The proposed control strategy was tested under different scenarios and demonstrated satisfactory performance.
Review
Green & Sustainable Science & Technology
Mohsin Ali Koondhar, Ghulam Sarwar Kaloi, Abdul Sattar Saand, Sadullah Chandio, Wonsuk Ko, Sisam Park, Hyeong-Jin Choi, Ragab Abdelaziz El-Sehiemy
Summary: This article provides a thorough analysis of grid connection technologies for the integration of large-scale offshore wind farms (OWFs). It discusses in detail HVDC topologies based on voltage source converters (VSCs) and line-commutated converters (LCCs), as well as all DC transmission systems. It also offers a selection criterion for HVDC transmission, arguing for its growing use.
Article
Green & Sustainable Science & Technology
Sihang Wu, Xiangyu Zhang, Wenxuan Jia, Yuan Zhu, Lei Qi, Xiaojiang Guo, Xiaofeng Pan
Summary: This paper proposes a modular multilevel converter with integrated energy dissipation equipment to meet the requirement of fault ride through and provide an economic and reliable solution.
IEEE TRANSACTIONS ON SUSTAINABLE ENERGY
(2022)
Article
Computer Science, Hardware & Architecture
Huimin Wang, Zhaojun Steven Li
Summary: This paper proposes a fuzzy-GPC load frequency control (LFC) controller based on the T-S fuzzy model for addressing the frequency security issue in integrated power systems with wind farms. Simulation results comparing the proposed controller with traditional controllers (PI and GPC) show that the fuzzy-GPC controller outperforms in regulating the frequency and tie-line power.
IEEE TRANSACTIONS ON RELIABILITY
(2023)
Article
Energy & Fuels
Rui Zeng, Yizhen Wang
Summary: This paper proposes an improved frequency regulation strategy for VSC-HVDC integrated offshore wind farm. The strategy utilizes the rotor kinetic energy of wind turbines to suppress frequency decrease and uses the DC capacitors of VSC-HVDC to compensate for the deficiency value of wind farm output power, thereby addressing the frequency stability problems caused by large renewable energy integration.
Article
Engineering, Electrical & Electronic
Abdelfattah A. Eladl, Azza A. ElDesouky
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2019)
Article
Engineering, Electrical & Electronic
Ahmed N. Sheta, Gabr M. Abdulsalam, Abdelfattah A. Eladl
Summary: Fast and accurate fault location in power networks is crucial for system reliability and continuity of supply, and this paper introduces a new technique based on PMUs and ISD for online tracking. Results show that the proposed method is effective for different network topologies and scenarios.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2021)
Article
Engineering, Electrical & Electronic
Abdelrahman Sobhy, Mohammed A. Saeed, Abdelfattah A. Eladl, Sobhy M. Abdelkader
Summary: This paper presents a method for determining the Thevenin equivalent (TE) parameters of a power system using local phasor measurement unit (PMU) measurements. The method is based on an innovative application of Discrete Fourier Transform (DFT), calculating DFT coefficients for the measured voltage and current phasors to determine the TE parameters. The method utilizes the characteristics of DFT to develop a simple and efficient approach for TE determination, which also detects measurement errors and obtains the best estimate of TE parameters, identifying erroneous measurements.
ELECTRIC POWER SYSTEMS RESEARCH
(2022)
Article
Engineering, Electrical & Electronic
Abdelfattah A. Eladl, Mohamed Basha, Azza A. ElDesouky
Summary: This paper proposes a multi-objective genetic algorithm-based reactive power planning method that considers objectives such as minimizing power losses, maximizing voltage stability, and increasing total transfer capacity. The best solution is determined using a fuzzy min-max approach and compared with other optimization methods. Satisfactory results are obtained in experiments on a test system and a real power grid.
ELECTRICAL ENGINEERING
(2022)
Review
Energy & Fuels
Abdelwahab D. Bebars, Abdelfattah A. Eladl, Gabr M. Abdulsalam, Ebrahim A. Badran
Summary: This paper provides a detailed review of internal fault detection techniques for doubly-fed induction generator (DFIG) based wind turbines (WTs). It discusses various methods and models used for detecting faults in DFIG stator, rotor, or both. A novel sorting technique is introduced, and a comparison is made to illustrate the differences and advantages of each method and/or model. Real monitoring systems available in the market are also presented. The paper concludes with recommendations for future research and addressing challenges in the field of DFIG internal faults.
PROTECTION AND CONTROL OF MODERN POWER SYSTEMS
(2022)
Article
Engineering, Multidisciplinary
Abdelfattah A. Eladl, Ahmed N. Sheta, Mohammed A. Saeed, Mohammed A. Abido, Mohamed A. Hassan
Summary: This study proposed a method for optimally allocating Phasor Measurement Units (PMUs) in power systems using binary integer programming technique, achieving complete observability of the network and reducing the number of PMUs. Through testing and comparison, it was found that this method can effectively place PMUs and save time consumption.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Abdelfattah A. Eladl, Mohamed I. Basha, Azza A. ElDesouky
Summary: In this study, a probabilistic multi-objective reactive power planning (RPP) framework is proposed for power systems with high penetration of wind farms (WFs). A novel wind turbine model that can dynamically control reactive power is suggested based on the capability curve of a double-fed induction generator. A new bi-level optimization technique is introduced to address the uncertainties of loads and wind power, resulting in improved voltage stability (VS) and decreased VAR sources' costs.
ELECTRIC POWER SYSTEMS RESEARCH
(2023)
Article
Green & Sustainable Science & Technology
Magda El-Afifi, Magdi M. Saadawi, Abdelfattah A. Eladl
Summary: This paper presents an optimal day-ahead operation of a large residential demand sector based on the energy hub model with combined heat and power as a cogeneration system. The optimization aims to maximize social welfare and minimize environmental emissions under various technical constraints. Real cases were studied to explore the effectiveness of the proposed model, and the Archimedes optimization algorithm was implemented to evaluate its efficiency. The results show that the proposed framework significantly increases social welfare and reduces environmental emissions.
Review
Engineering, Electrical & Electronic
Asmaa M. Aboelezz, Bishoy E. Sedhom, Magdi M. El-Saadawi, Abdelfattah A. Eladl, Pierluigi Siano
Summary: Shipboard microgrids (SBMGs) are gaining popularity in the power industry for their potential in reducing fossil-fuel usage and increasing power production. However, operating SBMGs faces challenges due to operational and environmental constraints. Therefore, intelligent control, management, and protection strategies are crucial to ensure safe operation under complex and uncertain conditions. This comprehensive review paper discusses the classifications, control, management, and protection of SBMGs, as well as recent research trends and contributions in these areas. The paper also highlights the need for further research on the optimization of SBMGs, including efficiency, reliability, and cost-effectiveness, as well as the development of advanced control and protection strategies.
Article
Engineering, Multidisciplinary
Asmaa M. Aboelezz, Magdi M. El-Saadawi, Abdelfattah A. Eladl, Bishoy E. Sedhom
Summary: This article presents an intelligent electronic device (IED) that provides a rapid fault detection and location method for ship power systems (SPSs). The device utilizes the pilot distance protection scheme with IEC 61850 communication network and relies on high-frequency fault transient feature for fault estimation. Experimental results validate the effectiveness of the proposed method in locating different types of faults at various locations.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2023)
Article
Multidisciplinary Sciences
Samaa Fawzy, Elhossaini E. Abd-Raboh, Abdelfattah A. Eladl
Summary: This paper proposes a bilevel multi-objective optimization algorithm for optimal allocation of flexible AC transmission system devices, addressing the issue of renewable energy spillage and improving power system stability and social welfare.
SCIENTIFIC REPORTS
(2023)
Review
Engineering, Electrical & Electronic
Abdelfattah A. Eladl, Samaa Fawzy, Elhossaini E. Abd-Raboh, Akram Elmitwally, Gibran Agundis-Tinajero, Josep M. Guerrero, Mohamed A. Hassan
Summary: Most countries are increasingly exploiting renewable energy resources, particularly wind power, for economic and environmental reasons. However, the high penetration of wind energy in modern electrical networks raises issues such as frequency variation, voltage instability, and transmission capacity limitations. To address these problems, strategies such as spilling wind power or adding dispatchable generation and storage systems have been proposed. This paper provides a comprehensive literature review on the issue of wind power spillage (WPS) and discusses state-of-the-art solutions to minimize WPS while ensuring power system stability and security. The paper also explores real-world applications, challenges, and future trends in the field of WPS research.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Computer Science, Information Systems
Abdelfattah A. Eladl, Mohammed A. Saeed, Bishoy E. Sedhom, Josep M. Guerrero
Summary: This paper proposes a protection scheme for multi-terminal high voltage direct current (MT-HVDC) transmission grids, which includes three protection levels and utilizes support vector machine (SVM) for fault detection and discrimination. The scheme also integrates the use of Internet of things (IoT) for monitoring and coordination. Experimental results demonstrate the effectiveness of the proposed scheme in fast and reliable fault detection and discrimination for MT-HVDC grids.
Article
Green & Sustainable Science & Technology
Seyed Majid Hashemzadeh, Mohammed A. Al-Hitmi, Hadi Aghaei, Vafa Marzang, Atif Iqbal, Ebrahim Babaei, Seyed Hossein Hosseini, Shirazul Islam
Summary: This article proposes an interleaved high step-up DC-DC converter topology with an ultra-high voltage conversion ratio for renewable energy applications. The converter utilizes an interleaved structure to reduce the input source current ripple, which is advantageous for solar PV sources. By employing voltage multiplier cells and coupled inductor techniques, the topology enhances the output voltage. The article provides comprehensive operation modes and steady-state analyses, compares the proposed structure with other similar converter topologies, and validates the mathematical analysis with experimental results.
IET RENEWABLE POWER GENERATION
(2024)
Article
Green & Sustainable Science & Technology
Gang Xu, Zixuan Guo
Summary: This paper proposes a two-stage resilience enhancement strategy for the recovery of critical loads after disasters. The first stage utilizes a heuristic algorithm to determine the post-disaster topology, while the second stage incorporates user demand response to maximize the socio-economic value of the recovery.
IET RENEWABLE POWER GENERATION
(2024)
Article
Green & Sustainable Science & Technology
Faruk Oral
Summary: This study investigates the wind characteristics and electricity generation potential from wind energy in the Bitlis-Rahva region in eastern Turkey. Wind data from the Bitlis meteorological station is analyzed using the WindPRO program to determine the wind speed distribution and predict turbine performance. The results show that the region has low wind energy capacity factor, indicating it is not efficient for wind energy investments. However, it is suggested that higher altitudes in the region may have better wind energy utilization.
IET RENEWABLE POWER GENERATION
(2024)
Article
Green & Sustainable Science & Technology
Yingjie Tang, Zheren Zhang, Zheng Xu
Summary: This paper investigates the modular multilevel matrix converter with symmetrically integrated energy storage for low frequency AC system. An evaluation method for the minimum required number of active submodules is presented, and the influences of operating conditions on the minimum required number of active submodules are studied. Issues about the converter control system are also discussed in this paper.
IET RENEWABLE POWER GENERATION
(2024)
