Article
Thermodynamics
Bingxu Zhao, Pengfei Duan, Mengdan Fen, Qingwen Xue, Jing Hua, Zhuoqiang Yang
Summary: In this study, the coordinated management of multiple community energy prosumers (CEPs) is explored under the same distribution network. A mixed game-based optimal operation model is developed, integrating Stackelberg and cooperative games, to facilitate the coordination of unit operations, demand response, and peer-to-peer energy trading among CEP coalitions. The model is solved with a two-stage distributed algorithm and is verified to be effective through a case study.
Article
Energy & Fuels
Istvan G. Balazs, Attila Fodor, Attila Magyar
Summary: Balancing in a distributed generation network becomes more challenging due to the increasing number of residential prosumers. This paper introduces a framework for estimating and predicting the power flexibility of residential prosumers using a simulation model and simple prediction method. Experimental results validate the proposed approach for short-term forecasting of prosumer flexibility.
Article
Green & Sustainable Science & Technology
Andrigo Filippo Antoniolli, Helena Flavia Naspolini, Joao Frederico de Abreu, Ricardo Ruether
Summary: Residential rooftop PV adoption in Brazil and other sunbelt countries has seen a widespread increase due to the decreasing costs of PV technology. A case-study conducted in Florianópolis-Brazil evaluated the role and benefits of residential rooftop PV to prosumers. The study found that PV integration led to a reduction in utility's electricity consumption and an increase in prosumer's consumption, while significantly reducing the utility's expenses. The adoption of rooftop PV in Brazil was demonstrated to be advantageous, with decreasing payback times.
Article
Engineering, Multidisciplinary
Haotian Yao, Yue Xiang, Shuai Hu, Gang Wu, Junyong Liu
Summary: The emergence of prosumers in distribution networks allows for proactive management of distributed energy resources and trading. A bilevel framework for prosumers enables joint optimization of internal scheduling and external P2P trading. By considering interactive benefits of DERs and P2P trading, a cooperative interaction method is proposed for optimization. An iterative bilateral negotiation algorithm is introduced for P2P trading, integrated with network charges to facilitate agreement among trading peers.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2022)
Article
Energy & Fuels
Dimitra G. Kyriakou, Fotios D. Kanellos
Summary: This paper proposes a coordinated optimal operation scheduling method for active distribution networks hosting complex microgrids. The method minimizes the information exchange between the microgrid and the active distribution network, thus optimizing the system operation.
Article
Energy & Fuels
Yasin Zabihinia Gerdroodbari, Mohsen Khorasany, Reza Razzaghi
Summary: This paper presents a novel framework for the efficient integration of distributed energy resources (DERs) by providing dynamic operating envelopes (OEs) and conducting asset management. The performance of the proposed framework is evaluated through various simulation studies and compared with existing technologies.
Article
Thermodynamics
Yue Xiang, Lili Zhou, Yuan Huang, Xin Zhang, Youbo Liu, Junyong Liu
Summary: A multi-period reactive coordinated optimal operation model for distributed wind generation (DWG) in the distribution network is established in this study. By considering the active-reactive power coordination characteristics of wind turbines and integrating the operating strategy of reactive power resources, the efficiency of power flow calculation for DWG penetrated distribution network is significantly improved. The simulation results show that the integration of reactive power resources can further promote the consumption of DWG and improve the operating profits of the distribution network.
Article
Energy & Fuels
Shuo Liu, Shanjin Kai, Jianlin Li, Haotian Miao, Honghao You, Xu Zhou
Summary: This paper proposes a pinning coordination secondary control method for microgrids, which can achieve a weak connection operation mode between microgrids and the grid. By applying a pinning coordination control strategy based on distributed droop theory, the dynamic performance of the system can be improved and the required communication bandwidth and control cost can be reduced.
Article
Engineering, Electrical & Electronic
Abdollah Hosseinzadeh, Alireza Zakariazadeh
Summary: Recent statistical analysis shows that the number and intensity of natural catastrophes worldwide are increasing due to climate change. Therefore, there is an urgent need to use cutting-edge technology to mitigate the damaging impacts. This paper presents a novel method for increasing resilience by installing intelligently managed remote switches and optimizing the capacity of Distributed Generations (DGs).
ELECTRICAL ENGINEERING
(2023)
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
Xingxu Zhu, Xueshan Han, Yijing Xu, Junhui Li
Summary: This paper proposes an optimal-tracking control strategy to address the shortage of AGC resources in power systems with high proportions of renewable generators, integrating the optimization of ADNs into AGC. Different ADNs can coordinate to absorb power fluctuations beyond AGC adjustment ranges in a distributed manner. The effectiveness of this control strategy is verified through case studies, showing its ability to effectively restrain frequency deviations while meeting operational constraints of ADNs.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2022)
Article
Engineering, Electrical & Electronic
Renzo Vargas, Leonardo H. Macedo, Juan M. Home-Ortiz, Jose Roberto Sanches Mantovani, Ruben Romero
Summary: This article introduces a new mixed-integer second-order cone programming model for solving the restoration problem in active distribution systems with distributed generators, voltage regulators, on-load tap changers, and capacitor banks. Tests on a 53-node system show that the proposed approach outperforms radial configurations and that voltage control can lead to more efficient restoration schemes.
IEEE TRANSACTIONS ON SMART GRID
(2021)
Article
Automation & Control Systems
Hossein Saber, Mehdi Ehsan, Moein Moeini-Aghtaie, Hossein Ranjbar, Matti Lehtonen
Summary: Designing transactive energy markets for residential prosumers is an important topic, but existing platforms often ignore voltage imbalance issues and lack user-friendly strategies. This article proposes a network-constrained TE model that effectively addresses these problems and decreases voltage imbalance.
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
(2022)
Article
Computer Science, Information Systems
Renzo Vargas, Leonardo H. Macedo, Juan M. Home-Ortiz, Ruben Romero
Summary: This study introduces a new mathematical model to address the restoration problem in balanced distribution systems with distributed generators, taking into account closed-loop topology operation. The main objectives during the restoration state are to minimize load curtailment in the restored system and reduce the number of switching operations. By considering the possibility of forming loops, the proposed model achieves better results compared to traditional open-loop configurations.
IEEE SYSTEMS JOURNAL
(2021)
Article
Energy & Fuels
S. Mahyar Masoumi-Amiri, Majid Shahabi, Taghi Barforoushi
Summary: This paper proposes a new framework for studying the interactions between resources and lines expansion in microgrids, and distribution network expansion. It aims to maximize the profit of the microgrid owner through optimal decisions on distributed resources and lines expansion, while minimizing expansion and operation costs through energy exchanges and distribution network expansion. The results show that the presence of a microgrid structure in distribution network planning helps improve operation conditions and encourage investor participation.
SUSTAINABLE ENERGY GRIDS & NETWORKS
(2021)
Article
Chemistry, Multidisciplinary
Jingshan Wang, Ke-Jun Li, Yongliang Liang, Zahid Javid
Summary: The paper proposes a model for optimal operation of multi-energy microgrids incorporating solar photovoltaics, heterogeneous energy storage, and integrated demand response. Historical data is used to compute PV power at different confidence levels using a p-efficient point method, while demand response is extended and mathematically modeled based on the quantized flexibility interval of multi-energy load demand. This model is formulated as a mixed-integer linear program and implemented on typical summer and winter days, showing benefits for maximum PV utilization, energy efficiency, and economic system operation.
APPLIED SCIENCES-BASEL
(2021)
Article
Automation & Control Systems
Zhijie Liu, Ke-Jun Li, Jinyu Wang, Wentao Liu, Zahid Javid, Zhuo-di Wang
Summary: This study introduces a general MMC model which comprehensively considers various optimization methods to improve the multiaspect performance of the MMC, with a calculation error less than 1%. The proposed model shows better performance compared to traditional models in affecting both DC and fundamental components in modulation signals.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Zhuodi Wang, Kejun Li, Jun Liang, Kaiqi Sun, Jinyu Wang, Zhijie Liu
Summary: The coastal urban multi-terminal DC (CU-MTDC) is a potential solution for improving power supply security for coastal urban areas (CUP) and integrating large-scale offshore wind farms. However, large DC disturbances may impact CUP power supply security significantly. Existing DC imbalance power distribution methods are not easily applied to CU-MTDC due to complex optimization processes and expanded fault influence ranges. This paper proposes a coordinated control strategy for CU-MTDC under abnormal conditions, which includes principles for calculating active power references, a strategy for distribution under abnormal conditions, and calculating controller parameters. Through a simple control process, the strategy effectively limits the impact of DC faults on the urban power grid. Simulation results validate the effectiveness of this proposed control strategy.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Electrical & Electronic
Rizwan Ahmed, Aamir Nawaz, Zahid Javid, Muhammad Yousaf Ali Khan, Aamer Abbas Shah, Orlando M. Valarezo
Summary: The paper investigates the simultaneous optimization of generation dispatch and network topology for PLF-based OTS, utilizing cumulants and Gram-Charlier methods to improve accuracy and convergence speed. The results demonstrate the practical value of this approach for large-scale power systems.
ELECTRICAL ENGINEERING
(2022)
Article
Engineering, Multidisciplinary
Liangzi Li, Ke-Jun Li, Kaiqi Sun, Zhijie Liu, Wei-Jen Lee
Summary: With the increasing development of dc renewable power generation and dc power consumption, residential low-voltage dc (RLVDC) power systems have gained more attention. However, the lack of standardization remains a challenge for the practical application of RLVDC. This study presents a comparative investigation on different voltage levels in RLVDC systems, aiming to provide guidance for energy prosumers and equipment manufacturers interested in RLVDC systems.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2022)
Article
Multidisciplinary Sciences
Wenning Wang, Kejun Li, Kaiqi Sun, Jianjian Wang
Summary: The choice of VSC control strategy for different strengths of AC systems is crucial for maintaining the balance between a high proportion of renewable energy integration and stable operation of the AC system. This study compares two common VSC control strategies, VCC and PSC, and proposes their operation zones based on SCR and power limit calculations. The results show that the VSC based on VCC gradually becomes unstable as the SCR decreases, while the stability of the VSC based on PSC increases. The analysis provides a criterion for improving the operating stability of the VSC in the power system.
Article
Engineering, Multidisciplinary
Zhijie Liu, Ke-Jun Li, Zhonglin Guo, Jinyu Wang, Jianhang Qian
Summary: Modulation ratio is an important index for power converters, but its application in modular multilevel converters has problems and cannot accurately reflect their modulation characteristics.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2022)
Article
Engineering, Multidisciplinary
Kaiqi Sun, Ke-Jun Li, Zhengfa Zhang, Yongliang Liang, Zhijie Liu, Wei-Jen Lee
Summary: This article introduces a new scheme for integrating suburban renewable energies, hydrogen production, and logistics, with a focus on coordinating their operation and optimizing energy utilization. The proposed scheme considers uncertainties in renewable energy output and truck demand to improve the revenue of each component. Case studies validate the effectiveness and economic value of the integrated scheme.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2022)
Article
Energy & Fuels
Zahid Javid, Ulas Karaagac, Ilhan Kocar
Summary: This paper proposes a unique iterative power flow solver based on graph theory for DC distribution networks, and validates its feasibility and superiority by using the IEEE 33 bus test feeder.
Article
Engineering, Electrical & Electronic
Zahid Javid, Ulas Karaagac, Ilhan Kocar
Summary: This article introduces an efficient load-flow solution method for DC distribution networks based on MANA formulation and NR algorithm. The convergence and quadratic convergence conditions are formulated using Kantorovich's theorem. The proposed method is tested on the modified IEEE 33 bus test feeder and compared with other numerical methods, showing better convergence properties and faster simulation speed.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2023)
Article
Engineering, Electrical & Electronic
Zhijie Liu, Yu-Chuan Li, Liangzi Li, Zhonglin Guo, Ke-Jun Li, Jinyu Wang
Summary: This article investigates the relationship between the arm dc reference and average capacitor voltage in modular multilevel converters (MMCs) and uncovers some new findings. It is discovered that the average capacitor voltage is composed of a major component and a minor component, which has been overlooked in previous studies. The average capacitor voltage decreases with an increasing arm dc reference due to its major component, and the exact relationship is highly dependent on the practical power condition of the MMCs, influenced by the minor component. The conventional strategy for average capacitor voltage control has negative effects when the MMC provides reactive power for ac systems. The conclusions of this article are validated through simulations and experiments.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Zhijie Liu, Ke-Jun Li, Zhonglin Guo, Jinyu Wang, Jianhang Qian
Summary: This article focuses on evaluating the over-modulation risk of modular multilevel converters (MMCs). It proposes a new concept called dynamic modulation ratio (DMR) to accurately reflect the modulation characteristics, as the conventional modulation ratio (CMR) is found to be inaccurate for MMCs. Quantitative comparisons show that the DMR-based evaluation method is consistently accurate in all situations.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2022)
Article
Engineering, Multidisciplinary
Jie Liu, Kaiqi Sun, Ke-Jun Li, Yuchuan Li, Jin Zhang
Summary: This article introduces a novel power injection priority optimization-based control strategy for a PMSG-based wind farm. The strategy aims to provide voltage support and mitigate frequency excursion caused by voltage dip during faults. The conventional fixed reactive power injection priority plan is replaced by an adaptive power injection priority plan in order to achieve this objective. The control problem is formulated as a multi-objective function optimization problem, where the power injection priority plan is calculated by minimizing the shortfall of WF active power and maximizing the reactive power injection of WF. Simulation results demonstrate the effectiveness of the proposed strategy in mitigating frequency excursion while complying with the voltage support requirement during faults.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Zahid Javid, Tao Xue, Karaagac Ulas, Ilhan Kocar
Summary: This paper proposes a load flow solver for DC distribution networks by incorporating generic DC/DC converter models. The proposed method utilizes graph theory to generate a generic load flow solver. It has the advantage of forming the Laplacian Matrix only once and can handle all DC/DC converter operations, providing a fast load flow solution for DC distribution networks.
2022 IEEE 9TH INTERNATIONAL CONFERENCE ON POWER ELECTRONICS SYSTEMS AND APPLICATIONS, PESA
(2022)
