Article
Engineering, Electrical & Electronic
Shreeram Kulkarni, Dattatraya N. Gaonkar
Summary: In recent years, the number of grid-connected microgrid systems has significantly increased to improve the availability and reliability of renewable energy sources. These systems offer a promising solution for sustainable energy integration by reducing reliance on fossil fuels. Phase-Locked Loop (PLL) controllers have emerged as a key solution for seamless synchronization of renewable energy sources with the grid. This paper analyzes, designs, and compares different PLL techniques and evaluates their performance under various test scenarios. The results demonstrate the effectiveness of these PLL techniques for grid synchronization.
ELECTRIC POWER SYSTEMS RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
Joao Antonio Guedes Archetti, Dalmo C. Silva Junior, Lucio de Medeiros, Henry L. L. Salamanca, Leonardo Fuchs, Leonardo Willer de Oliveira, Janaina G. Oliveira
Summary: This paper proposes a real-time simulation model for automation and control systems of electrical distribution networks with microgrids, distributed generation, and storage resources. The model combines hardware-in-the-loop control with the aid of a Real-Time Digital Simulator (RTDS) and includes dynamic behavior of switched elements and inverters. By using a communication platform based on TCP/IP protocol, the model allows the operation of the network in grid-connected and islanded mode, ensuring computational time for experimental implementation. The proposed model solves optimal dispatch energy storage system problem and load shedding problem to optimize the operation of microgrids and evaluate the performance of a storage system. Results demonstrate the applicability of the optimization algorithms, achieving reasonable computational time and accurate decision-making.
ELECTRIC POWER SYSTEMS RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
Mahdi Mosayebi, Seyed Mohammad Sadeghzadeh, Meysam Gheisarnejad, Mohammad Hassan Khooban
Summary: This article presents an intelligent and fast controller for parallel dc-dc converters in islanded dc microgrids in shipboard power systems, aiming to provide fast response, proper voltage regulation, and optimal current sharing. The proposed control approach combines nonlinear I-V droop control, intelligent single-input interval type-2 fuzzy logic controller, and sliding mode control to improve voltage regulation and current-sharing accuracy. By utilizing extended state observer and dynamic consensus algorithm, coordinated control between distributed generators in shipboard power systems is achieved with validated effectiveness through hardware-in-the-loop experiments.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2021)
Article
Engineering, Electrical & Electronic
Xiangke Li, Minghao Wang, Chaoyu Dong, Wentao Jiang, Zhao Xu, Xiaohua Wu, Hongjie Jia
Summary: The paper introduces paralleled BILCs for HMG, which provide a flexible and reliable power interaction between ac and dc subgrids with high power density. A DUC is proposed to achieve resilience reinforcement and global economic operation. The economic droop controls f(ac) - lambda(ac) and v(dc) - lambda(dc) are employed for ac DGs and dc DGs to decrease generation expenses, while coordinating the normalized ac subgrid's frequency and dc subgrid's voltage for economic power interaction.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Victor Samano-Ortega, Heriberto Rodriguez-Estrada, Elias Rodriguez-Segura, Jose Padilla-Medina, Juan Aguilera-Alvarez, Juan Martinez-Nolasco
Summary: This article presents the development of a low-cost control hardware in the loop platform for the validation and analysis of controllers used for power sharing management between the main grid and a DC microgrid. The platform consists of a main grid interconnection system emulator and a controller under test, communicating with each other using analog signals and validated by comparison with simulation results in PSIM.
APPLIED SCIENCES-BASEL
(2021)
Article
Energy & Fuels
Noushin Poursafar, M. J. Hossain, Seyedfoad Taghizadeh
Summary: This paper presents an enhanced distributed DC-bus signaling control strategy for converters of photovoltaic systems (PVs) to make the islanded DCMG less dependent on the backup energy storage system (BESS). The proposed control method maintains DC-bus voltage via intelligently managing output powers of the PVs and switches between MPPT and voltage regulating control operations. It effectively protects the DCMG from shutdowns during the absence of the BESS and reduces oscillations on the DC-bus voltage during the presence of the BESS.
CSEE JOURNAL OF POWER AND ENERGY SYSTEMS
(2022)
Article
Engineering, Electrical & Electronic
V. Shreeram Kulkarni, N. Dattatraya Gaonkar
Summary: Control and protection are crucial for the stable operation of an island microgrid. A new droop control strategy combining improved droop with virtual impedance control is proposed in this article to achieve power sharing and f/V restoration in an islanded AC microgrid. The robustness of the strategy in response to system power load changes is tested in a hardware-in-loop test-bed.
ELECTRIC POWER SYSTEMS RESEARCH
(2021)
Article
Green & Sustainable Science & Technology
Qianwen Xu, Yan Xu, Zhao Xu, Lihua Xie, Frede Blaabjerg
Summary: This article proposes a hierarchically coordinated control scheme for DC MG clusters under uncertainty, optimizing power set points and droop curve coefficients simultaneously to minimize operating costs and transmission loss. The approach ensures information privacy and plug-and-play feature, featuring decentralized power sharing and distributed optimization.
IEEE TRANSACTIONS ON SUSTAINABLE ENERGY
(2021)
Article
Engineering, Electrical & Electronic
Siddhartha Nigam, Olaoluwapo Ajala, Alejandro D. Dominguez-Garcia, Peter W. Sauer
Summary: This paper introduces a C-HIL method for testing secondary frequency control schemes of AC microgrids, discussing the modeling, theory, and testbed used. Testing results compare the performance and resilience of the centralized and distributed control schemes in terms of system response time and device failure.
ELECTRIC POWER SYSTEMS RESEARCH
(2021)
Review
Energy & Fuels
Swetalina Sarangi, Binod Kumar Sahu, Pravat Kumar Rout
Summary: This paper highlights the importance and challenges of protection in DC microgrids, as well as some loopholes in current research. By systematically and chronologically reviewing DC microgrid systems, some reliable improvements have been suggested.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Energy & Fuels
Junhao Cui, Guizhen Tian, Guangchen Liu, Yuanyuan Wu, Zihao Guo
Summary: This paper studies the power distribution control strategy of hybrid energy storage system (HESS) and the coordinated control strategy of isolated DC microgrid. The effectiveness of these control strategies is verified through simulation and hardware-in-the-loop experiment.
Article
Green & Sustainable Science & Technology
Xiao-Kang Liu, Jiong Cai, Lantao Xing, Yan-Wu Wang
Summary: In this paper, a distributed secondary control strategy based on quantized signals is proposed to eliminate voltage deviation of DC microgrids induced by droop control. By using quantized signals and an event-triggered mechanism, current sharing and voltage restoration can be achieved, and the communication burden and controller updating rate can be reduced.
IEEE TRANSACTIONS ON SUSTAINABLE ENERGY
(2023)
Article
Energy & Fuels
Shuo Liu, Honghao You, Jianlin Li, Shanjin Kai, Liyong Yang
Summary: A new distributed secondary control scheme based on LADRC is proposed in this paper to improve current sharing accuracy in DC microgrid by compensating voltage and current with LADRC controllers. The performance of the proposed control scheme in the frequency domain is analyzed and the effectiveness of the method is verified through simulation and experimental results.
SUSTAINABLE ENERGY GRIDS & NETWORKS
(2021)
Article
Automation & Control Systems
Shrivatsal Sharma, Vishnu Mahadeva Iyer, Subhashish Bhattacharya
Summary: This article proposes a distributed secondary control method for droop-controlled dc microgrid systems, which achieves accurate current sharing and improved load voltage regulation. The method has the advantage of distributed control, low communication requirements, and seamless hot swap capability.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Energy & Fuels
Sayed Abulanwar, Abdelhady Ghanem, Mohammad E. M. Rizk, Weihao Hu
Summary: This paper proposes an adaptive synergistic control strategy for a hybrid AC/DC microgrid to enhance stability, optimize power sharing among resources, and mitigate voltage disturbances caused by load variations. The strategy utilizes an internal DC link and hybrid renewable resources to ensure reliable power supply and counteract parameter uncertainties, while also maintaining grid connection and protection during faults.