Article
Green & Sustainable Science & Technology
Tao Zhang, Jiahui Jiang, Daolian Chen
Summary: This paper proposes a PV submodule-distributed maximum power point tracking (DMPPT) scheme based on a multi-port DC converter, which includes in-depth analysis and research on PV model, mismatch characteristics, and VE strategy. The trade-off between true DMPPT and VE on control overhead and tracking accuracy is discussed, and the feasibility and progress of the proposed scheme are verified through experiments.
Article
Computer Science, Information Systems
Io-Wa Iam, Zhaoyi Ding, Zhicong Huang, Chi-Seng Lam, Rui P. P. Martins, Pui-In Mak
Summary: A rooftop photovoltaic (PV) system is an important solution for building-integrated centralized generation in the low-voltage DC grid. The drilling-free rooftop PV-inductive wireless power transfer (PV-IWPT) system can reduce installation and maintenance costs by eliminating physical cable connections and preventing thermal bridge breakage and rain penetration. However, achieving simultaneous MPPT for the PV panels and MEPT for the system under diverse irradiance conditions is challenging for the PV-IWPT system.
Article
Automation & Control Systems
Vijaya Vardhan Reddy, B. L. Narasimharaju, Hiralal Murlidhar Suryawanshi
Summary: This article presents an effective method of power extraction from photovoltaic (PV) using a front-end DC-DC resonant converter with dual control. The conventional boost converter has lower efficiency and requires extra components for soft-switching. Additionally, the power transfer efficiency for PV integration is limited. To address these challenges, an isolated DC-DC resonant converter with proposed control is investigated in this article, achieving wider voltage regulation and maximized PV power generation. The proposed control method improves efficiency even under light load conditions without affecting the digital signal processor resolution, and uses a simple perturb and observe maximum power point PI control approach. A 2.2-kW prototype is built and operated to verify the performance over the entire load, with a peak efficiency of 98.7% at 50% of the full load (1.1 kW).
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Jeremy D. Watson, Ioannis Lestas
Summary: Hybrid AC/DC networks offer advantages but controlling them poses challenges, passivity theory can ensure network stability. Research shows that appropriate design of ILC controller can achieve power allocation and maintain stable operation of the network.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2021)
Article
Engineering, Multidisciplinary
Luigi Costanzo, Alessandro Lo Schiavo, Massimo Vitelli, Lei Zuo
Summary: This article focuses on the dynamic optimization of the operating conditions of two types of ac-dc converters used for interfacing regenerative rail vehicle suspensions based on ac electromagnetic generators. The optimal operating conditions, leading to the maximization of the extracted power, can be predicted from the measurement of the generator speed.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Ziqing Xia, Mei Su, Zhangjie Liu, Ruisong Liu, Yonglu Liu
Summary: This paper investigates the existence conditions and stability of DC micro-grids with distributed generations and constant power loads. The power flow equation is derived and the solvability condition is obtained using Banach's fixed-point theorem. The stability of the DC micro-grid is analyzed by examining the eigenvalues of the Jacobian matrix.
IEEE TRANSACTIONS ON SMART GRID
(2022)
Article
Chemistry, Physical
Md Biplob Hossain, Md Rabiul Islam, Kashem M. Muttaqi, Danny Sutanto, Ashish P. Agalgaonkar
Summary: This paper proposes a system modeling and performance analysis of a renewable hydrogen energy hub connected to an ac/dc hybrid microgrid. The system can utilize a fuel cell and a hydrogen tank to meet the load demand when renewable energy is insufficient, and generate renewable hydrogen when renewable power is in excess. The effectiveness of the system is validated through simulations.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Electrical & Electronic
Anmol Ratna Saxena, Ashima Kulshreshtha
Summary: This paper proposes and analyzes a novel bidirectional DC-DC converter for use in a low-voltage low-power residential DC nano-grid powered by solar photovoltaic energy. By deriving design equations, developing small-signal models, and optimizing parameter selection, the converter's performance is validated through theoretical and experimental results, highlighting its applicability in renewable energy systems.
INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS
(2021)
Article
Automation & Control Systems
Van-Quang-Binh Ngo, Mohsen Latifi, Rabeh Abbassi, Houssem Jerbi, Kentaro Ohshima, Mehrdad khaksar
Summary: Photovoltaic systems have garnered attention globally for being sustainable and environmentally friendly energy sources. To ensure efficient operation and extract maximum power, a tracking controller known as MPPT is required. Traditional MPPT algorithms like P&O show inaccuracies in performance, particularly during high variations in irradiance.
JOURNAL OF THE FRANKLIN INSTITUTE-ENGINEERING AND APPLIED MATHEMATICS
(2021)
Article
Automation & Control Systems
Andrei-Constantin Braitor, George Konstantopoulos, Visakan Kadirkamanathan
Summary: This paper investigates the stability of meshed DC micro-grids with constant power loads under decentralized primary and distributed secondary control schemes. The stability of the entire DC micro-grid is analytically proven by analyzing the dynamics of the converters with the loads and the two-layer control. The scalability of the system is ensured through relevant passivity analysis.
Article
Engineering, Electrical & Electronic
Willem Lambrichts, Mario Paolone
Summary: In this paper, an exact and linear measurement model for hybrid AC/DC micro-grids is proposed for recursive state estimation. The model includes an exact linear model of a voltage source converter and accounts for various losses. Synchronized measurements are provided by phasor measurement units and DC measurement units. An adaptive Kalman Filter is also proposed to improve the resilience and speed of state estimation.
IEEE TRANSACTIONS ON SMART GRID
(2023)
Article
Computer Science, Information Systems
Saurabh Kumar, Vijayakumar Krishnasamy, Rajvir Kaur
Summary: This article proposes a unified controller for a Cuk converter assisted self-excited induction generator (SEIG) on a direct current nano grid configuration for rural electrification. The control strategy is designed to select operating modes in grid-connected and islanded mode, performing maximum power point tracking (MPPT) and voltage regulation. Harmonic spectrum analysis shows the effectiveness of diode bridge rectifiers over semi-controlled/controlled rectifiers.
IEEE SYSTEMS JOURNAL
(2021)
Article
Automation & Control Systems
Young Hoon Joo, Ruban Antonysamy, Thirumoorthy Ramasamy, Seong Ryong Lee
Summary: This study discusses the power maximization and dc-link voltage regulation problems of a permanent magnet vernier generator (PMVG)-based wind energy conversion system. The proposed sliding-mode control scheme achieves maximum power extraction and stable dc link voltage.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Green & Sustainable Science & Technology
Aamir Hayat, Daud Sibtain, Ali F. Murtaza, Sulman Shahzad, Muhammad Sheheryar Jajja, Heybet Kilic
Summary: Photovoltaic systems utilize renewable energy sources to replace conventional combustible fuels, and efficient operation is crucial for extracting maximum power. The involvement of a converter in the system poses challenges in locating the maximum power point and maintaining performance in varying weather conditions. This research focuses on non-isolated boost converters and derives the formula for the input capacitor through average state-space modeling. Results show that the input capacitor performs efficiently when it is half the size of the output capacitor, and the system exhibits stable behavior with a fast convergence speed until the irradiance falls to 400 W/m(2).
Article
Energy & Fuels
Diego Rivelino Espinoza Trejo, S. Taheri, Jose L. Saavedra, Patricia Vazquez, Cristian H. De Angelo, Jose A. Pecina-Sanchez
Summary: Most literature on control and stability analysis of distributed maximum power point tracking photovoltaic systems are based on small-signal ac models, which may not provide accurate approximation for nonlinear models at different operating points. This article introduces a nonlinear model of series-connected boost dc/dc converters and develops control and stability analysis to address this limitation. Experimental and numerical investigations are conducted to validate the proposed control approach.
IEEE JOURNAL OF PHOTOVOLTAICS
(2021)
Article
Automation & Control Systems
Reza Sepehrzad, Ali Reza Moridi, Mohammad Esmaeil Hassanzadeh, Ali Reza Seifi
Summary: A control strategy based on PSO and energy management algorithms was proposed to optimize power distribution in the micro-grid and improve its reliability and control levels.
Article
Engineering, Electrical & Electronic
Reza Sepehrzad, Amirhossein Mahmoodi, Seyedeh Yosra Ghalebi, Ali Reza Moridi, Ali Reza Seifi
Summary: This paper introduces an intelligent energy management method to control the voltage and frequency of micro-grids at primary and secondary control levels. The proposed model, based on model predictive control and intelligent neural network, demonstrates superior performance, stability, and reliability in protecting micro-grids against uncertainties. Simulation and experimental results validate the effectiveness of the method.
ELECTRIC POWER SYSTEMS RESEARCH
(2022)
Article
Engineering, Electrical & Electronic
Reza Sepehrzad, Mostafa Khojasteh Rahimi, Ahmed Al-Durra, Mehdi Allahbakhshi, Alireza Moridi
Summary: In this paper, an adaptive virtual impedance control method based on the multi-objective particle swarm optimization algorithm is proposed for voltage and frequency control of micro-grids, aiming to achieve proportional power distribution. The proposed method demonstrates optimal performance in different operating conditions.
ELECTRIC POWER SYSTEMS RESEARCH
(2022)
Article
Energy & Fuels
Reza Sepehrzad, Javid Ghafourian, Atefeh Hedayatnia, Ahmed Al-Durrad, Mohammad Hassan Khooban
Summary: This study presents the energy management and control strategy in an isolated DC microgrid with renewable energy sources and battery storage units. The proposed model is based on sequential distributed energy management and multiple dynamic matrix model predictive control algorithm (MDMMPC). The algorithm is implemented for power control and management, considering generation prioritization and minimal communication. Simulation results show the effectiveness of the strategy in different scenarios. The experimental setup demonstrates the simplicity, rapidity, ease of operation, and distributed control scheme.
JOURNAL OF ENERGY STORAGE
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Reza Govahian Jahromi, Ali Reza Seifi
2016 24TH IRANIAN CONFERENCE ON ELECTRICAL ENGINEERING (ICEE)
(2016)
Article
Engineering, Electrical & Electronic
Ehsan Rahmkhoda, Jawad Faiz, Moein Abedini
Summary: This paper investigates the failures and errors of loss-of-excitation (LOE) protection and proposes an intelligent method combined with a learning vector quantization (LVQ) neural network. The simulation results demonstrate that the proposed algorithm can detect LOE conditions quickly and prevent stresses applied to the machine and power system.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Andre M. Garcia, Leonardo H. Macedo, Ruben Romero
Summary: This article presents a specialized scatter search algorithm to solve the optimal transmission switching problem considering voltage control, and its efficiency is validated through tests.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Adel F. Alrasheedi, Khalid A. Alnowibet, Ahmad M. Alshamrani
Summary: This paper studies the bidding strategy problem of microgrid in a day-ahead electricity market. The DA electricity prices, demand, and uncertainties are modeled using different scenarios and robust optimization. A smart predict-and-optimize methodology is proposed, where a cost-oriented prediction model is used to replace accuracy-oriented methods. The trilevel mathematical programming approach is utilized to construct a cost-oriented model and solve the problem.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Depin Lv, Qiusheng Yu, Xiaoyong Wang, Yulian Bo, Yongjing Wei, Lei Liu, Pu Zhang, Yan Zhang, Wensheng Zhang
Summary: This study proposes a method based on the MHA-CNN framework to monitor the operation status of the smart grid and power communication network coupling. The method utilizes HHT to extract features from operational data and employs MHA to extract key feature information from fault data, achieving faster fault detection speed and higher detection probability.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Tao Zhang, Zhiguo Hao, Hongyue Ma, Songhao Yang, Chongtao Li
Summary: This paper introduces a dominant mode identification (DMI) method to assess the stability of grey-box grid-tied converters. The method analyzes the critical eigenvalues and can be applied to different grid connection scenarios.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Aamir Nawaz, Hongtao Wang, Huiting Yang, Hammad Armghan, Jiechao Gao
Summary: This paper presents a risk constrained probabilistic problem framework for addressing the challenges of stochastic dispatching due to contingencies and the integration of renewable sources. By utilizing probabilistic analytical target cascading, polynomial chaos expansion, and benders decomposition algorithm, the proposed method reduces computational burden and improves efficiency.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Thongchart Kerdphol, Issarachai Ngamroo, Tossaporn Surinkaew
Summary: This paper introduces an enhanced robust H-infinity technique to improve the regulation performance and cyber resiliency of secondary frequency control in a microgrid. The study shows that cyber-attacks affect different elements of secondary frequency control in the microgrid depending on the type of attack used.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Sambeet Mishra, Praveen Prakash Singh, Ivar Kiitam, Muhammad Shafiq, Ivo Palu, Chiara Bordin
Summary: This study aims to analyze partial discharge events in high-voltage cables and extract patterns and trends. The results indicate a positive correlation between the number of PD events and the increase in voltage levels, with negative PD peaks being more frequent at lower stress levels.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Cleberton Reiz, Jonatas B. Leite, Clara S. Gouveia, Mohammad Sadegh Javadi
Summary: This research proposes a bilevel method to simultaneously solve the allocation and coordination problems in microgrid protection, considering local devices. The results show that solving these problems simultaneously can save costs and select the optimal solution.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Rasha Elazab, M. Ser-Alkhatm, Maged A. Abu Adma, K. M. Abdel-Latif
Summary: This paper proposes a two-layer methodology for the allocation and sizing of SVCs in radial distribution systems. The Power Loss Index (PLI) is used to choose the best candidate buses for allocating SVCs, and a two-stage stochastic programming algorithm is proposed to solve the sizing problem. The advantages of combining SVCs and the PV inverter's reactive power provision ability are also analyzed.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Samreen Javaid, Dongyu Li, Abhisek Ukil
Summary: This paper introduces a new algorithm based on high pass filter for traveling wave fault location, which can differentiate the peak value of the traveling wave more easily by removing oscillation in the signal. The algorithm is tested on a DC simulation model and executed in MATLAB environment, achieving high accuracy in fault location results. Compared with traditional methods, this algorithm shows higher accuracy and faster response.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Enzhe Wang, Xiangrong Chen, Hanshan Zhu, Kai Yin, Muhammad Awais, Ashish Paramane
Summary: This paper aims to reduce the power loss of tunnel cable systems by using different grounding and loss reduction methods. The case study of the submarine tunnel power cable project in Ningbo-Zhoushan, China is considered. The nodal admittance matrices of the cable are established using the telegraph equation, and the cascading algorithm is used to analyze the induced voltage and circulating current in the cable sheath, taking into account the presence of grounding node. The study finds that coordinating the amplitude and phase angle of series impedance can reduce the power loss of the cable system.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Ziwei Ma, Jasronita Jasni, Mohd Zainal Abidin Ab Kadir, Norhafiz Azis
Summary: A numerical model was developed to analyze lightning attachment on UHV-AC double-circuit transmission lines. Simulation results showed that upward leaders simultaneously occurred on the ground wire and the upper-phase conductor when the phase conductors were energized. A new expression for calculating the striking distance on the ground wire was proposed based on the simulation results. Additionally, high voltage, phase angle, and terrain slope were found to increase the surface electric field of the upper-phase conductor.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Kunal Kumar, Susmita Kar
Summary: This paper presents an efficient protection scheme utilizing the rate of change parameter to detect both shunt faults and high impedance faults. By comparing with the existing scheme and testing on the IEEE 13 Bus test system, the effectiveness of the proposed scheme is demonstrated.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Cheng Che, Bangbang He, Zhixuan Gao, Qiwei Lu, Yang Chen, Zhifeng Wang, Jinghan Guo, Yanwen Wang
Summary: A low-cost hybrid railway power conditioner (HRPC) technology scheme is proposed in this paper to effectively compensate negative sequence current (NSC) of the V/v traction system and reduce the capacity and cost of the railway power conditioner (RPC). The proposed HRPC combines an RPC with a modular multilevel converter structure (MMC-RPC) and a railway static var compensator (RSVC) and considers regenerative braking energy in the compensation process.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
