Article
Green & Sustainable Science & Technology
Qusay Salem, Rafat Aljarrah, Mazaher Karimi, Ayman Al-Quraan
Summary: This paper investigates the modeling and control methodology of grid-forming inverters, using a decentralized control strategy to drive the operation of the inverters for supply-demand balancing and power-sharing among multiple inverters. The effectiveness of the proposed method is validated by monitoring the frequency and voltage of the inverters under varying PQ loads and comparing the performance with the assumed droop characteristics. The concept of power-sharing among two grid-forming inverters connected to a single load is also observed.
Article
Automation & Control Systems
Jianbo Chen, Dong Yue, Chunxia Dou, Lei Chen, Shengxuan Weng, Yanman Li
Summary: A new P-(V) droop method is proposed in this article to decouple the power of distributed generators in low-voltage microgrids, improving power-sharing accuracy. It utilizes virtual complex impedance, restoration mechanism, and modified strategy to ensure grid stability and achieve efficient power sharing.
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
(2021)
Article
Energy & Fuels
Buxin She, Fangxing Li, Hantao Cui, Jinning Wang, Liang Min, Oroghene Oboreh-Snapps, Rui Bo
Summary: This paper proposes a decentralized and coordinated voltage and frequency (V-f) control framework for islanded microgrids, which takes into account the limited capacity of distributed energy resources (DERs) and V-f dependent load. The framework includes a power regulator and a V-f regulator, which regulate the output of grid-forming inverters and improve the V-f deviation by leveraging load sensitivity to V-f.
IEEE TRANSACTIONS ON ENERGY CONVERSION
(2023)
Article
Green & Sustainable Science & Technology
Hammad Alnuman
Summary: This paper investigates the impact of line impedance and passive filter parameters on the stability of a microgrid in grid-connected mode. Small signal stability analysis is performed and sensitivity analysis identifies the parameters highly participating in the small signal stability.
Article
Energy & Fuels
Huan Pan, Xiao Feng, Feng Li, Jing Yang
Summary: This paper investigates the energy coordination control strategy for the standalone DC microgrid integrated with PV, energy storage, and EV charging. The simulation results show that the proposed coordination control strategy can effectively improve the stability of the DC microgrid system and reduce energy storage capacity redundancy.
Article
Engineering, Electrical & Electronic
Krishnakumar R. Vasudevan, Vigna K. Ramachandaramurthy, Gomathi Venugopal, J. B. Ekanayake, S. K. Tiong
Summary: This paper investigates a hybrid microgrid composed of wind electric and pico hydel energy storage systems, proposing a hierarchical frequency control framework and analyzing its effectiveness through time-domain simulations. The framework effectively manages the energy sources of the microgrid, ensures minimal de-loading of the wind turbine, and maintains the frequency within the limits specified by the Indian Electricity Grid Code.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2021)
Article
Computer Science, Information Systems
Xiaogang Wang, Hongdong Wang
Summary: This paper proposes a power exponential function droop control strategy considering the state of charge, which allows ESU to adaptively adjust output power based on its SoC level, achieving superior performance compared to conventional droop control and power function droop control methods according to simulation results.
Article
Engineering, Electrical & Electronic
Wei Xing, Hewu Wang, Languang Lu, Shuoqi Wang, Minggao Ouyang
Summary: The study introduces a novel adaptive droop control strategy for energy storage batteries, which estimates battery parameters online and designs a droop controller based on the "virtual battery" algorithm for adaptive power distribution and SOC balancing. This method takes into account battery characteristics and aging, making it more suitable for DES with multiple sets of batteries.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2021)
Article
Engineering, Electrical & Electronic
Ali Hosseinipour, Javad Khazaei
Summary: This paper proposes a novel complex droop control (CDC) for voltage control units in hybrid DC microgrids, which enables flexible power management and improved voltage regulation and damping. A novel design procedure based on a reduced-order DC microgrid model is introduced to accurately tune the splitting frequencies for dynamic power sharing. System-level small-signal analysis is conducted to study the dominant oscillatory modes and the impact of the proposed control on the stability of the hybrid DC microgrid. Offline and real-time simulations show that the CDC effectively shares dynamic power and improves voltage regulation and damping.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2023)
Article
Engineering, Electrical & Electronic
Zifan Zhang, Xiangyu Yang, Shiwei Zhao, Danlan Wu, Jianghua Cao, Mengzhen Gao, Guanbao Zeng, Zhidong Wang
Summary: A system-level large-signal stability analysis is conducted for a droop-controlled DC microgrid in this article. The stability and load limit conditions of the DC microgrid are obtained, and the theoretical analysis is verified by simulation results.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2022)
Article
Energy & Fuels
Anindya Bharatee, Pravat Kumar Ray, Arnab Ghosh
Summary: This paper considers a model of a grid-integrated AC/DC microgrid with the assimilation of renewable energy resources and supercapacitors with battery storage-based hybrid energy storage. The insertion of renewable resources and energy storage devices in the existing power grid requires analysis of power balance and system stability. The microgrid is designed for bidirectional power flow with a simplified control strategy dividing power requirement into slow and fast varying components.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Analytical
Zhi Zhang, Sheng Gao, Caomao Zhong, Zhaoyun Zhang
Summary: In this paper, a small AC signal (SACS)-injection-based modified droop control method is proposed for accurate active and reactive power sharing among paralleled distributed generation (DG) units in an islanded microgrid. The proposed control method adjusts the voltage amplitude of each DG unit by injecting small AC signals to form a reactive power control loop, avoiding the issue of mismatched feeder impedance in conventional droop control strategies. This strategy eliminates the need for communication links or specific knowledge of the feeder impedance, requiring only local information. Moreover, parameter design procedure and stability analysis are thoroughly considered, and simulation and experimental results validate the effectiveness of the proposed control scheme, achieving accurate active and reactive power sharing.
Article
Energy & Fuels
Mohammad Adelpour, Mohsen Hamzeh, Keyhan Sheshyekani
Summary: This paper presents a comprehensive small-signal stability analysis for synchronous generator-based microgrids, investigating the impact of loading conditions on droop-controlled and PQ-controlled SGs. It was found that droop-controlled SGs exhibit weaker stability, or even instability, in light loading conditions, while the operation of PQ-controlled SGs in such conditions can improve the stability of SG-based microgrids.
SUSTAINABLE ENERGY GRIDS & NETWORKS
(2021)
Article
Energy & Fuels
Xueping Li, Gerald Jones
Summary: Microgrids, using distributed generators and energy storage systems, can increase energy reliability and independence. We developed a simulation framework to optimize the configuration and energy management strategy of microgrids for emergency power.
Article
Computer Science, Information Systems
Jiechao Lv, Xiaoli Wang, Guishuo Wang, Yuhou Song
Summary: Isolated DC microgrids, with their plug-and-play features and flexible operation modes, have become a focus of research in the field of distributed power generation. This paper designs a control strategy for an isolated DC microgrid based on the state of charge of the battery energy storage system (BESS), aiming to maintain stability and power balance in the microgrid. The control strategy adjusts the droop coefficient in real time and controls the charge and discharge power of the battery energy storage unit (BESU) to achieve a balanced state of charge among the BESUs.
Article
Computer Science, Information Systems
Guodong Xu, Ce Shang, Songli Fan, Xiao Hu, Haozhong Cheng
Article
Thermodynamics
Dongwen Chen, Xiao Hu, Yong Li, Ruzhu Wang, Zulkarnain Abbas, Shunqi Zeng, Li Wang
ENERGY CONVERSION AND MANAGEMENT
(2020)
Article
Thermodynamics
Xiao Hu, Heng Zhang, Dongwen Chen, Yong Li, Li Wang, Feng Zhang, Haozhong Cheng
Article
Thermodynamics
Heng Zhang, Xiao Hu, Haozhong Cheng, Shenxi Zhang, Shaoyun Hong, Qingfa Gu
Summary: A novel stochastic MAUC framework is proposed to coordinate scheduling of generators and tie lines by reducing scenario numbers and establishing tie-line operation modes. Case studies show that more wind energy can be consumed through tie lines, coordinating the scheduling of generators and tie lines for improved efficiency and flexibility.
Article
Energy & Fuels
Dongwen Chen, Zulkarnain Abbas, Yong Li, Xiao Hu, Shunqi Zeng, Yuquan Liu
Summary: This study presents an optimal site approach for a centralized integrated energy station by considering all possible candidate sites throughout the energy supplying area. The analysis of energy transmission losses in pipelines and feeders is based on nodal energy flow models. By conducting simultaneous optimization of station site and energy distribution networks, it is found that accurate consideration of energy transmission loss in heating networks is essential for significant reductions in life cycle costs. Comparing with single energy source stations, centralized integrated energy stations are more competitive in integrated energy systems.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Energy & Fuels
Xiao Hu, Dong-Wen Chen, Heng Zhang, Dong-Qiang Jia, Yong Li, Feng Zhang
Proceedings Paper
Energy & Fuels
Xiao Hu, Guodong Xu, Haozhong Cheng, Li Wang, Yuquan Liu, Ying Cai
2018 IEEE POWER & ENERGY SOCIETY GENERAL MEETING (PESGM)
(2018)
Article
Energy & Fuels
Shenxi Zhang, Min Wen, Haozhong Cheng, Xiao Hu, Guodong Xu
CSEE JOURNAL OF POWER AND ENERGY SYSTEMS
(2018)
Proceedings Paper
Energy & Fuels
Xiao Hu, Senkai Tang, Haozhong Cheng, Li Wang, Yuquan Liu, Ying Cai
2017 IEEE CONFERENCE ON ENERGY INTERNET AND ENERGY SYSTEM INTEGRATION (EI2)
(2017)
