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About 555 papers for “microgrid interconnection”
Simpson, M. · University of North Texas Digital Library (University of North Texas) · 2013
This presentation by Mike Simpson of the National Renewable Energy Laboratory (NREL) describes NREL's microgrid vehicle-to-grid charging station interconnection testing.
Cited by 0
Hira Saleem · 2014
Cited by 4
Erckrath, Tobias, Bendfeld, Christian, Unruh, Peter et al. · Publication Server of Bonn-Rhein-Sieg University of Applied Sciences (Bonn-Rhein-Sieg University of Applied Sciences) · 2022
1620
Cited by 3
IJSREM Journal · INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT · 2023
Undoubtedly, one of humanity's greatest achievements is electricity. It has made our life significantly easier. Almost all of our everyday chores are made easier because of electricity. Our house is filled with electric appliances for example, television, fan, refrigerator, oven, etc. we cannot imagine our life without electricity. However, production of electricity causes harm to our environment. For this reason, we have decided to make a device that can successfully switch between multiple sources of electricity that are generated by renewable methods. This paper will showcase the successful implementation of this device and its impact on our daily life, its working, principles behind it and various other related things. Key Words: Automated System, Biofuel, Energy Transmission, Electricity, Fossil Fuel Alternative, Microgrid, Power Supply
Cited by 0Open access
Ajaz Ul Haq · International Journal of Trend in Scientific Research and Development · 2018
A microgrid is mostly a portion of the power distribution system that includes distributed generation, energy storage and loads. To be accomplished of working in parallel to the grid, as an independent power island and in transition modes, microgrids must be vigorous in governing the local voltage and frequency, and shielding the network and equipment connected to the microgrid. It also necessities to ease demand side management and resynchronization. This paper presents a review of existing microgrid test networks around the world and some significantly different microgrid simulation networks present in the literature. Paper is focused on the test systems and available microgrid control options. A summary table comparing and contrasting the existing test systems is presented. The paper is concluded highlighting the worthy findings and possible areas of research that would enhance practical use of microgrid facilities.
Cited by 0Open access
QI Zhiping · 2010
This paper studies and designs a common interconnection interface between distributed generation and microgrid. The interface is divided into two parts:information interface and power interface. The functions and design methods of the two parts are analyzed. The plug and play interconnection interface between distributed generation and microgrid is presented. Based on the requirements for microgrid operation,five operational modes of the interconnection models are studied. The designed interconnection unit is used to test the different operational modes and switching from one mode to another. These tests also show that the modular design of the interconnection interface model is scalable,technology independent and flexible to meet the needs of interconnection between different distributed generation units and microgrid.
Cited by 8
Wiam Ayrir, Ahmed M. Helmi, Haitham S. Ramadan · 2024
This paper presents an in-depth study on the reconfiguration of power distribution networks (PDN) in two interconnected microgrids using a recent bio-based optimization algorithm, the Artificial Hummingbird Algorithm, to minimize power losses and improve voltage profile within interconnected microgrids while keeping the radial topology in each microgrid and within the two. The proposed approach is validated by simulation on two interconnected 20-bus systems, demonstrating its effectiveness in achieving a balance between minimizing losses and improving voltage profile while reducing the cost function. Additionally, the results provide valuable insights into the field of PDN reconfiguration, providing a practical framework to optimize network performance and promote sustainable energy management.
Cited by 1
Mingliang Mu, Xingzhen Bai, Liting Dong · 2019
The stable operation of energy internet system is affected while renewable energy output and load fluctuations occur. In order to improve the anti-interference ability of the energy internet microgrid that combined heat and power(CHP), the research on the flexibility of system scheduling is studied. Firstly, the available flexibility that each micro-element can provide is analyzed, and the flexibility indicators of power and heating are proposed. Furthermore, a two-stage optimal scheduling model with flexibility improvement is proposed, and addressing uncertainty by scheduling flexible resources. In the day-ahead stage, the cost and flexibility are targeted for optimization. In the real-time adjustment stage, the power deviation caused by uncertainty is corrected by scheduling flexible resource and corrective cost is targeted for optimization. The results proved that the proposed optimal scheduling model can improve the scheduling flexibility and ensure that power fluctuations can be effectively eliminated.
Cited by 0
Michael Ropp, Matthew J. Reno, W. Bower et al. · OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) · 2020
Secondary networks are used to supply power to loads that require very high reliability and are in use around the world, particularly in dense urban downtown areas. The protection of secondary network systems poses unique challenges. The addition of distributed energy resources (DERs) to secondary networks can compound these challenges, and deployment of microgrids on secondary networks will create a new set of challenges and opportunities. This report discusses secondary networks and their protection, the challenges associated with interconnecting DERs to a secondary network, issues expected to be associated with creating microgrids on secondary networks, standards that deal with these challenges and issues, and suggestions for research and development foci that would yield new means for addressing these challenges. ACKNOWLEDGEMENTS This material is based upon work supported by the Department of Energys Office of Electricity. The authors would like to express their appreciation to Dan Ton, DOE Microgrid Program Manager, Office of Electricity for his leadership in identifying the need for a report to advance protection to meet the evolving needs of microgrids and their interconnection to the distribution system. The authors would also like to thank Abraham Ellis for his thorough review of the document and his valuable suggestions.
Cited by 13Open access
Vicente_15_ · 2021
Cited by 0
Chang‐Yun Wang, Xiaohu Guan, Haiying Dong et al. · 2023
The interconnected location of the microgrid is related to the stable operation of both the distribution network and microgrid. This paper used the sitting of microgrid as a foothold to reduce the impact of voltage deviation and network loss after microgrid connection to the distribution; a method on the interconnected location of the microgrid based on multiobjective decision is proposed. This method synthetically considers the voltage deviation, network loss, voltage improvement level, network loss improvement level and static voltage stability index after the microgrid is connected to the distribution network. First, the microgrid is respectively connected to each candidate node in the distribution network system, and the five selected indexes of each node are calculated according to the power flow. Then, by constructing the ideal optimal object and the ideal worst object, the candidate nodes are divided into three categories by means of fuzzy clustering. The Euclidean distance method is then used to further refine the clustering results to realize the sorting of the candidate nodes. Finally, the accuracy and rationality of the sorting results are verified by the simulation results of a typical microgrid connected to an IEEE14 distribution network.
Cited by 0
Yang Liu, YE Haidong, Lisheng Li et al. · IET conference proceedings. · 2025
When the number and capacity of grid-connected operating new energy sources reaches a high level of penetration, microgrids can significantly affect the distribution system. Most of the current solutions either focus solely on distribution system or solely on microgrids. There are few studies that consider involvement in distribution-microgrid coordination. In order to solve the above problem, a multi-objective coordinated architecture based on flexible DC interconnections is proposed. A method of controlling active power with DC interconnection between microgrids is adopted to realize the source-load power balance of the distribution system. The distribution-microgrid multi-objective coordinated architecture is able to take into account the comprehensive benefits of the distribution system and microgrid. It can reduce the active network losses at the distribution layer and ensure that the economic and environmental indicators at the microgrid layer are dynamically balanced. An optimization scheduling model for the multi-objective coordinated architecture of distribution-microgrid is proposed, focusing on objectives of reliability and cost-effectiveness. Additionally, a particle swarm optimization algorithm with stochastic inertia weights is introduced to globally optimize the conflicting objectives. The simulation results verify the validity of the scheduling optimization for distribution-microgrid coordination. Moreover, the significance of flexible DC interconnection in controlling active power is verified.
Cited by 0
Charivil Sojy Rajan, Mabel Ebenezer · 2022 IEEE International Conference on Signal Processing, Informatics, Communication and Energy Systems (SPICES) · 2022
The conventional grid is gradually transitioning from its traditional unidirectional flow structure to a distributed and bidirectional one. Microgrids have emerged as a crucial entity in this regard. It consists of a number of Distributed Energy Resources working in a co-ordinated manner within clearly defined electrical boundaries to supply the load. One of the main shortcomings of microgrids is the intermittent nature of its sources. There has been tremendous research in the area of Energy Storage Systems (ESSs) to overcome this issue. However, they have limitations like high maintenance costs, disposal issues, etc. The above issues can be addressed using interconnected microgrids. Energy deficiency in one microgrid can be met by an interconnected neighbor. However, due to a large number of sources, maintaining the required voltage profile at the Point of Common Coupling (PCC) and the load bus will be challenging. This paper presents voltage and frequency controlled synchronverters to improve the voltage profile of a multi microgrid interconnection scheme. Modelling and simulations are done in the MATLAB/Simulink environment.
Cited by 2
Sheng Cai, Yunyun Xie, Menglin Zhang et al. · IEEE Transactions on Smart Grid · 2023
Sequential service restoration (SSR) is essential to restore critical loads after the distribution system outage through gradually forming microgrids (MGs). However, high penetration of renewables induces low-inertia issues, especially in small-scale MGs, which could impede a large-size load restoration for ensuring the MG dynamic stability. To expedite the restoration process, we propose the interconnection of MGs as part of SSR. A developed SSR model is proposed to generate restoration sequence and time of MG interconnection operation. An auxiliary variable is introduced to indicate the system topology before and after MG interconnection, and then the maximum permissive step load in each MG is quantified. By this means, isolated MGs are formed gradually, and adjacent MGs can be reconnected to improve the primary response when picking up a large load. Moreover, to address uncertainties of renewables, the stochastic approach is used. And an improved progressive hedging algorithm (PHA) is utilized to solve the stochastic model. The original model is decomposed by bundles of scenarios, and penalty factors are adaptively updated to accelerate the PHA convergence. Simulation results show the effectiveness of the proposed SSR method in improving the restoration efficiency of distribution systems and reducing computational burdens.
Cited by 20
S.M. Ferdous, Farhad Shahnia, GM Shafiullah · IET Smart Grid · 2021
Abstract Overloading and renewable‐based excessive generation are a frequently observed phenomena in an autonomously operating islanded microgrid (MG) which will lead to unacceptable voltage or frequency deviation in the MG. Such problems can be alleviated by mechanisms such as load shedding or curtailment of renewable sources. Alternatively, coupling the neighbouring MGs and enabling a provisional power exchange amongst them can improve the situation more effectively. The power exchange link between the MGs can be in the form of a conventional three‐phase ac line but a single‐phase ac link is more cost‐effective, especially considering the amount of the power that needs to be transferred through this link. This approach requires power electronics‐based converters to convert a three‐phase ac MG into a single‐phase power exchange link and control the power sharing amongst them. The same is needed when the MGs have to be coupled while maintaining their autonomy, but the corresponding costs of the single‐phase system are less. This article has proposed a decentralised approach to control and couple the neighbouring MGs to realise provisional power exchange through such a structure. The performance of the proposed control mechanism is evaluated through simulation studies in PSIM ® , and its sensitivity and stability are analysed against its key design and operational factors.
Cited by 6Open access
Jae-Won Lee, Geun-Joon Lee · The Transactions of The Korean Institute of Electrical Engineers · 2024
This paper discusses the mechanism of power trading based on the incremental reliability and incremental economy when a renewable energy-based standalone microgrid designed to have a certain level of supply reliability operates in coordination with other microgrids and the main grid. It examines the reliability and economy of the new power grid formed during coordination and demonstrates that the reliability and economy of micro-grids based on solar and wind power vary in load supply reliability due to the uncontrollability and intermittency/variability of output. Additionally, it shows that these factors can be altered by the introduction of energy storage systems and backup power supplies, allowing for reliability-economy trades that consider their differences during integrated operation of microgrids. Suggested method is applied and verified to PV and Wind microgrid interconnection and Jeju island, and showed the benfits and losses of interconnection. Also, the effects of source variability on LCOE at different demand style are discussed and suggested.
Cited by 0
Abrez Mondal, Souvik Chandra, Vijay Bhavaraju et al. · IEEE Industry Applications Magazine · 2022
This article describes the implementation of a brownfield microgrid with the upgrade of existing distributed energy resources (DERs), design of the medium-voltage (MV) interconnection, and implementation of a microgrid control system to meet the U.S. Department of Defense (DOD) needs at Fort Custer, Michigan. Brownfield microgrids involve complexities in design, integration, and commissioning but offer better economic viability due to reduced capital cost upfront. This work tries to identify the challenges associated with brownfield microgrids and provides systematic practical solutions to mitigate them. As part of the upgrades, backup diesel generators were retrofitted to support grid-parallel operation. A battery energy storage system (BESS) was newly installed to manage intermittencies for the existing solar generation and to support the microgrid. The individual DER assets were integrated in a two-level hierarchical microgrid control architecture and controlled in a coordinated manner to achieve seamless islanding and reconnection with the utility grid at the point of common coupling (PCC). The article provides the field data demonstrating the improvement in resiliency through islanded operation as well as maintaining power quality when operating in parallel with the utility. The economic operation of the assets and participation in utility ancillary services were also key goals achieved through the microgrid. This ability allows the military to reduce its total cost of ownership to achieve its mandated energy security needs.
Cited by 5
YU XIAOXIAO · National University of Singapore · 2012
Ph.D
Cited by 0
HE Xian-ping, Hao Zuo, Yan Li et al. · 2024
The multi-microgrid interconnection structure can achieve energy coordination among multiple microgrids and form energy complementary advantages. In order to improve the voltage stability of microgrid interconnection system, this paper aims at the problem of output uncertainty of distributed power sources in multi-source microgrid under the influence of weather changes. The reactive power coordination method between microgrids based on microgrid interconnection structure is studied. The reactive power support algorithm of distribution network under the condition of distributed power output fluctuation in microgrid and energy coordination difficulty between microgrids is studied. The interconnection control strategy between microgrids is established based on voltage update and voltage deviation control rate. An energy exchange control strategy between microgrid and distribution network based on microgrid virtual control and prediction error is established. The improved three-machine nine-node topology model is used to verify the voltage coordinated control model and algorithm established in this paper. The simulation results show that the voltage coordinated optimization control method proposed in this paper can effectively reduce the voltage fluctuation of microgrid and the reactive power exchange between microgrid and distribution network.
Cited by 0
Shahil Shah, Hongbo Sun, Daniel Nikovski et al. · 2018
This paper presents a consensus-based distributed synchronization control method for microgrids with multiple points of interconnection. The proposed method can synchronize a microgrid at different points of interconnection using a common sparse communication network among its distributed generators. This functionality is critical for the networked operation of multiple microgrids in the future power systems. The proposed approach uses averaging and leader-follower modes of a commonly used consensus algorithm for multi-agent systems to achieve microgrid synchronization and smooth transition between the islanded and grid-connected modes at different interconnection points. The operation of the proposed distributed synchronization method is demonstrated on a microgrid with four inverters, each with an independent interconnection point to another microgrid or a bulk power system.
Cited by 12