Article
Engineering, Electrical & Electronic
Shuo Liu, Haotian Miao, Jianlin Li, Liyong Yang
Summary: To overcome the disadvantages of droop control, this paper proposes a novel method of hierarchical distributed secondary control for DC microgrids. The method involves shift voltage and droop slope adjustment to compensate for voltage drop caused by the droop controller. The paper also presents the design process of the controller and proves the stability of the system. Simulations and experiments have verified the effectiveness and superior performance of the proposed control method.
ELECTRIC POWER SYSTEMS RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
A. S. Vijay, Mukul C. Chandorkar, Suryanarayana Doolla
Summary: Renewables in microgrids can be controlled through centralized, decentralized, or distributed approaches using inverters. The decentralized droop control aims to share load power proportionately among parallel connected sources by mimicking the performance of a synchronous generator. However, the conventional droop control may not ensure satisfactory performance in the presence of unbalanced/asymmetrical loads. This paper proposes five modifications to improve the sharing of unbalanced currents among sources, enhancing power quality and microgrid system reliability.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2023)
Article
Computer Science, Information Systems
Congshan Li, Xiaowei Zhang, Ping He, Zikai Zhen, Kefeng Zhao
Summary: This paper proposes an adaptive control strategy based on virtual inertia to solve the problem of the voltage source converter based multi-terminal direct current (VSC-MTDC) system lacking inertia and ability to participate in frequency modulation after connecting to the AC power grid under the traditional control strategy. The relationship between AC frequency and DC voltage is established using virtual inertia control, allowing the system to provide inertia to the AC side. An adaptive control is adopted to address the limited inertia coefficient selection due to DC voltage deviation. The superiority of the control strategy is highlighted by comparing it with conventional droop control and a fixed virtual inertia coefficient on a simulation platform.
Article
Engineering, Electrical & Electronic
Rabih A. Jabr
Summary: This study presents a mixed-integer conic optimization formulation for the design of generator droop control, which guarantees global optimality. Compared to classic linear droop control and recent piecewise linear formulations, the results show superior performance in reducing voltage violations and power loss.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2021)
Article
Engineering, Electrical & Electronic
F. Ismail, J. Jamaludin, N. A. Rahim
Summary: This paper presents a power-sharing scheme for distributed generators (DG) that performs auto-correction droop control under grid disturbances or sudden changes in local load. An improved P-Q-V droop control scheme is proposed to address the shortcomings of the conventional P-Q-V droop control and achieve proportionally-shared active and reactive power. The effectiveness of the proposed scheme is confirmed through simulation and experimental work.
ELECTRIC POWER SYSTEMS RESEARCH
(2023)
Article
Automation & Control Systems
Jinwei He, Yu Liu, Yizhen Wang
Summary: The proposed cascaded power flow regulator allows for flexible power sharing among string power cells and accurate control of injected power to the grid. By hierarchically controlling frequency and voltage at the central controller and local controllers, the system achieves flexible power regulation in a fully voltage control manner.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Sajjad Makhdoomi Kaviri, Hadis Hajebrahimi, Behzad Poorali, Majid Pahlevani, Praveen K. Jain, Alireza Bakhshai
Summary: This article presents a new droop-based supervisory-level controller for nanogrids in the islanded mode of operation, which significantly improves the dynamics of power electronic interfaces in NGs by taking into account input-side, output-side parameters, and dc-bus voltage dynamics. Theoretical analysis, simulation results, and experimental results confirm the feasibility and superior performance of the proposed control system.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Energy & Fuels
Ahmed M. M. Nour, Ahmed A. Helal, Magdi M. El-Saadawi, Ahmed Y. Hatata
Summary: This paper proposes a decentralized control method to mitigate voltage imbalance in a low voltage distribution network by using distributed batteries in smart grid interfaced residential PV systems. The method overcomes five challenges and utilizes fuzzy logic controllers for decentralized control. The proposed method is compared with centralized control and validated through simulations in MATLAB/Simulink.
PROTECTION AND CONTROL OF MODERN POWER SYSTEMS
(2023)
Article
Computer Science, Information Systems
Omar M. Abo Gabl, Mostafa F. Shaaban, Hatem H. Zeineldin, Mohammed E. Ammar
Summary: The study focuses on the operation of droop-based microgrids, emphasizing the selection and optimization of different droop characteristics to achieve optimal operational objectives. By incorporating a multiobjective mixed-integer nonlinear programming model into an optimal power flow framework, the optimization of droops is achieved while constraining the secondary control operating region to maintain operating conditions within acceptable frequency and voltage ranges.
IEEE SYSTEMS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Jinghang Lu, Xiaojie Liu, Mehdi Savaghebi, Xiaochao Hou, Peng Wang
Summary: This paper proposes a distributed event-triggered control strategy for voltage harmonic compensation, aiming to improve power quality in islanded AC microgrids. By employing distributed generator units, the strategy effectively compensates for harmonic voltage at the sensitive load bus, resulting in significant improvement of power quality. The suggested technique enhances system robustness by allowing voltage measurement and compensation by dedicated DG units, while the event-triggered mechanism reduces communication burden. Experimental case studies demonstrate the effectiveness of the proposed control strategy.
IEEE TRANSACTIONS ON SMART GRID
(2022)
Article
Computer Science, Information Systems
Henrique P. Correa, Flavio H. T. Vieira, Lina P. G. Negrete
Summary: This research focuses on enhancing voltage control in modern distribution grids with photovoltaic inverters. A novel decentralized method is proposed, which has practical features and is compatible with basic PV inverter droop controllers. Simulation results demonstrate its effectiveness.
Article
Engineering, Electrical & Electronic
H. Shehadeh, J. Siam, A. Abdo
Summary: This research uses the microgrid at Birzeit University Campus as a case study to enhance the holistic operations of the microgrid through a central control scheme and minimally invasive network reconfiguration, illustrating power-sharing in off-grid operations.
ELECTRIC POWER SYSTEMS RESEARCH
(2022)
Article
Automation & Control Systems
Yonghui Ling, Yanjun Li, Zhenquan Yang, Ji Xiang
Summary: This article proposes a dispatchable droop control method for multiple distributed generators in islanded ac microgrids, achieving effective power and frequency control.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Hongfei Xiao, Guangyu Liu, Jinfeng Huang, Shuaiqing Hou, Ling Zhu
Summary: A novel secondary voltage control scheme for autonomous microgrids is proposed in this paper, which is achieved by a secondary voltage controller and a parameter decision modular. Numerical simulation results demonstrate that the proposed scheme accurately allocates reactive power among distributed generation units and ensures that bus voltages have sufficient spare capacity.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2022)
Article
Engineering, Electrical & Electronic
Tongchuan Chen, Yingying Zhao, Qianqian Wang, Wenting Wang, Aimin An
Summary: This paper proposes a Distributed Secondary Compensation Control (DSCC) method to solve the problems of the transmission system controlled by traditional droop control. It improves the dynamic response of the system and its fault ride through capability.
JOURNAL OF ELECTRICAL ENGINEERING & TECHNOLOGY
(2023)
Article
Automation & Control Systems
Tzung-Lin Lee, Yen-Ching Wang, Jian-Cheng Li, Josep M. Guerrero
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2015)
Article
Energy & Fuels
Shang-Hung Hu, Tzung-Lin Lee, Chun-Yi Kuo, Josep M. Guerrero
Article
Energy & Fuels
Yen-Ching Wang, Fu-Ming Ni, Tzung-Lin Lee
Article
Engineering, Electrical & Electronic
Tzung-Lin Lee, Shang-Hung Hu
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2016)
Article
Engineering, Electrical & Electronic
Tzung-Lin Lee, Bing-Feng Li, Meng-Ying Yang, Yue-Ting Tsai
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2018)
Article
Computer Science, Information Systems
Mohammad M. Hashempour, Tzung-Lin Lee, Mehdi Savaghebi, Josep M. Guerrero
IEEE SYSTEMS JOURNAL
(2019)
Article
Engineering, Multidisciplinary
Mohammad M. Hashempour, Meng-Ying Yang, Tzung-Lin Lee
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2018)
Article
Automation & Control Systems
Tzung-Lin Lee, Shang-Hung Hu, Yu-Hung Chan
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2013)
Article
Automation & Control Systems
Josep M. Guerrero, Mukul Chandorkar, Tzung-Lin Lee, Poh Chiang Loh
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2013)
Article
Automation & Control Systems
Josep M. Guerrero, Poh Chiang Loh, Tzung-Lin Lee, Mukul Chandorkar
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2013)
Article
Engineering, Electrical & Electronic
Tzung-Lin Lee, Shang-Hung Hu
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2011)
Article
Computer Science, Interdisciplinary Applications
Mehdi Savaghebi, Juan C. Vasquez, Alireza Jalilian, Josep M. Guerrero, Tzung-Lin Lee
MATHEMATICS AND COMPUTERS IN SIMULATION
(2013)
Article
Engineering, Electrical & Electronic
Mohammad M. Hashempour, Fang-Ta Liu, Tzung-Lin Lee
IET POWER ELECTRONICS
(2019)
Article
Engineering, Electrical & Electronic
Mohammadreza Lak, Yue-Ting Tsai, Bing-Rong Chuang, Tzung-Lin Lee, Mohammad Hassan Moradi
Summary: This article proposes a hybrid method for transformerless 3LT(2) inverter to simultaneously minimize leakage current and achieve neutral point voltage balancing control. The method combines MVPWM and DPWM switching patterns to achieve the desired outcomes effectively.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Computer Science, Information Systems
Mohammadreza Lak, Ting-Lien Wu, Tzung-Lin Lee
Summary: A hybrid method based on dipolar variable injection and zero-sequence voltage injection concepts is proposed in this paper to simultaneously control the DC-link capacitors' voltage of the 3LT(2) inverter and eliminate their voltage ripple, improving system performance and reliability.
