Download or read book Coordinated and Optimal Voltage Control In Active Power Distribution written by Mohamed Azah and published by LAP Lambert Academic Publishing. This book was released on 2015-06-11 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the main technical challenges of an active distribution network is to maintain an acceptable voltage level in the system. This has initiated efforts in using various voltage control strategies to regulate the network voltage profile so that the voltage is maintained at its allowable voltage limits of 0.95 per unit to 1.05 per unit. A number of voltage control methods have been applied to solve voltage control problems associated with the connection of DGs in a distribution system. These voltage control strategies may be classified as decentralised or distributed and centralised or coordinated voltage control. In this work, different decentralised voltage control methods have been considered, namely, power factor control, on load tap changer control and generation curtailment control. From the literature, a number of coordinated voltage control strategies have been implemented to provide better and faster control to the system. In this research, the three decentralised voltage control methods are coordinated using fuzzy logic by considering the load bus voltages and DG power as inputs and the voltage control actions as the outputs.

Download or read book Novel Volt Var Control Strategies for Active Distribution Systems written by Mehmet Yilmaz and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Power distribution networks are rapidly evolving as active distribution systems, as a result of growing concerns for the environment and the shift towards renewable energy sources (RESs). The introduction of distributed generations can benefit the distribution network in terms of voltage support, loss reduction, equipment capacity release, and greenhouse gas (GHG) emission reduction. However, the integration of RESs into electric grids comes with significant challenges. The produced energy from renewable sources such as wind and solar is intermittent, non-dispatchable and uncertain. The uncertainty in the forecasted renewable energy will consequently impact the operation and control of the power distribution system. The impact on Volt/Var control (VVC) in active distribution systems is of particular concern, mainly because of reverse power flow caused predominantly by RESs. RESs can influence the operation of voltage control devices such as on-load tap changers (OLTCs), line voltage regulators (VRs) and shunt capacitor banks (ShCs). It is mainly because of reverse power flow, caused predominantly by RESs. Reverse power flow or injecting power between the regulator and the regulation point can confuse the local regulator controller, which leads to inappropriate or excessive operations. Some of the potential adverse effects include control interactions, operational conflicts, voltage drop and rise cases at different buses in a network. This research project aims to carry out an in-depth study on coordinated Volt/Var control strategies in active distribution networks. The thesis focuses on the problem of Volt/Var optimization in active distribution networks, operated under different operating conditions, by taking into consideration the current distribution system requirements and challenges in the presence of high RESs penetration. In the initial phase of the research project, a generic solution to the VVC problem of active distribution systems was first developed. The primary goal of this generic solution involved the determination of an optimal control strategy based on system status, which was identified from bus voltages. As such, there are three different operating states; normal, intermediate and emergency state. Each operating state has its own control strategy that includes state-related objective functions, such as minimization of power losses, operational control costs, and voltage deviation. For both normal and intermediate state operations, a heuristic-search based optimization algorithm is implemented. In order to be able to take control actions rapidly, a novel rule-based control strategy is developed for the emergency state. In the second phase of the research project, the proposed zone-oriented convex distributed VVC algorithm was developed to address the limitations of heuristic optimization algorithms, including long solution times and the non-global optimal solution. The proposed algorithm is based on chordal-relaxation semi-definite programming (SDP), and divides distribution systems into areas based on customer types, wherein, each zone has its own priorities, characteristics, and requirements. The primary goal is to achieve optimal voltage control for each zone, according to its operational requirements and characteristics. Furthermore, in contrast to many decentralized approaches that require iterative solutions to update global multiplier and a penalty parameter to convergence, this method proposes a novel multi-period hierarchical convex distributed control algorithm, requiring no iterative process and no penalty parameter. Eliminating the iterative solution makes convergence fast, while having no penalty parameter allows for the algorithm to be less human and system dependent. In the final phase of the research project, a 2-stage control algorithm aiming to minimize VR tap movements in convex VVC formulation was developed. In the first stage, the VVC problem is solved for hourly intervals, and VR tap positions are obtained. In the second stage, control horizon is divided into 15 minutes intervals, and the voltage is controlled only by the RESs' active and reactive power adjustment. The tap movement minimization and 2-stage control algorithm eliminates the excessive use of VRs, prolongs the operational life of VRs and reduces the system operational cost. The optimal operation of Volt/Var control devices was investigated in the presented Volt/Var optimization methodology. The proposed research will pave the way for managing the increasing penetration of RESs with different types, technologies and operational modes, from a distribution system voltage control perspective. The proposed methodologies in this thesis have been tested on sample distribution systems and their effectiveness is validated.

Download or read book Optimal Operation of Active Distribution Networks written by Feifan Shen and published by Elsevier. This book was released on 2023-08-29 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optimal Operation of Active Distribution Networks: Congestion Management, Voltage Control and Service Restoration provides researchers and practitioners with a clear and modern understanding of how to optimize the economic, secure and resilient operation of active distribution networks. The book provides case studies, modern implementations and supporting flowcharts and code, along with current research in congestion management, service restoration and voltage control of active distribution networks. Chapter provide an overview of the active distribution network concept, present key approaches for the congestion management of active distribution networks, and cover approaches in uncertainty, coordination of DLMP, scheduled re-profiling, and more. Other sections cover real-time congestion management and service restoration of active distribution networks. - Reviews how to optimally operate active distribution networks under normal conditions and demonstrates worked solutions and contingency planning to mitigate unforeseen challenges - Provides clear guidance on optimizing congestion management, voltage control and service restoration in DER-heavy systems - Demonstrates how to implement distributed voltage control in systems using active distribution networks - Provides an extensive body of methods, associated case studies, worked solutions and implementation discussions on how to embed best practices in engineering and research workflows

Download or read book Coordinated Voltage and Reactive Power Control of Power Distribution Systems with Distributed Generation written by Esa Aleksi Paaso and published by . This book was released on 2014 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Electric Distribution Network Management and Control written by Ali Arefi and published by Springer. This book was released on 2018-04-04 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights the recent research advances in the area of operation, management and control of electricity distribution networks. It addresses various aspects of distribution network management, including operation, customer engagement and technology accommodation. Electricity distribution networks are an important part of the power delivery system, and the smart control and management of distribution networks is vital in order to satisfy technical, economic, and customer requirements. A new management philosophy, techniques, and methods are essential to handle uncertainties, security, and stability associated with the integration of renewable-based distributed generation units, demand forecast and customer needs. This book discusses these topics in the context of managing the capacity of distribution networks while addressing the future needs of electricity systems. Furthermore, the efficient and economic operation of distribution networks is an essential part of management of system for effective use of resources, and as such the also addresses operation and control approaches and techniques suitable for future distribution networks.

Download or read book Voltage Control and Protection in Electrical Power Systems written by Sandro Corsi and published by Springer. This book was released on 2015-06-19 with total page 579 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the author’s twenty years of experience, this book shows the practicality of modern, conceptually new, wide area voltage control in transmission and distribution smart grids, in detail. Evidence is given of the great advantages of this approach, as well as what can be gained by new control functionalities which modern technologies now available can provide. The distinction between solutions of wide area voltage regulation (V-WAR) and wide area voltage protection (V-WAP) are presented, demonstrating the proper synergy between them when they operate on the same power system as well as the simplicity and effectiveness of the protection solution in this case. The author provides an overview and detailed descriptions of voltage controls, distinguishing between generalities of underdeveloped, on-field operating applications and modern and available automatic control solutions, which are as yet not sufficiently known or perceived for what they are: practical, high-performance and reliable solutions. At the end of this thorough and complex preliminary analysis the reader sees the true benefits and limitations of more traditional voltage control solutions, and gains an understanding and appreciation of the innovative grid voltage control and protection solutions here proposed; solutions aimed at improving the security, efficiency and quality of electrical power system operation around the globe. Voltage Control and Protection in Electrical Power Systems: from System Components to Wide Area Control will help to show engineers working in electrical power companies and system operators the significant advantages of new control solutions and will also interest academic control researchers studying ways of increasing power system stability and efficiency.

Download or read book Coordinated Voltage Control in Active Distribution Grids Using Distributed Field Measurements written by Rajkumar Palaniappan and published by . This book was released on 2022 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Electrical Distribution Networks written by Nouredine Hadjsaïd and published by John Wiley & Sons. This book was released on 2013-01-22 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the fundamental aspects of the new generation of electrical distribution grids, taking as its starting point the opportunities that exist for restructuring existing infrastructure. It emphasizes the incorporation of renewable energy sources into the distribution grid and the need for a technological evolution towards the implementation of smartgrids. The book is organized into two parts: the first part analyzes the integration of distributed energy sources into the distribution grid and the impact of these sources on grid operation. After a general description of the general characteristics of distribution grids and renewable energy sources, it then analyzes the economics of electrical energy distribution networks and presents the impact of these sources on grid operation. The second part of the book then analyzes the various functions which allow for safe operation of the grid and realization of the path towards real world application of smartgrids.

Download or read book Handbook of Optimization in Electric Power Distribution Systems written by Mariana Resener and published by Springer Nature. This book was released on 2020-02-24 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook gathers state-of-the-art research on optimization problems in power distribution systems, covering classical problems as well as the challenges introduced by distributed power generation and smart grid resources. It also presents recent models, solution techniques and computational tools to solve planning problems for power distribution systems and explains how to apply them in distributed and variable energy generation resources. As such, the book therefore is a valuable tool to leverage the expansion and operation planning of electricity distribution networks.

Download or read book Electric Power Distribution Engineering written by Chee-Wooi Ten and published by CRC Press. This book was released on 2024-03-22 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: Are you fascinated by the complex web of electrical power that illuminates our modern world? Do you want to understand the intricate systems responsible for delivering electricity to our homes, businesses, and industries? Look no further than Electric Power Distribution System Engineering, Fourth Edition by renowned author Turan Gönen, revised and updated by Chee-Wooi Ten and Ali Mehrizi-Sani. This captivating book takes you on a journey through the fascinating realm of electric power distribution, offering a comprehensive yet accessible exploration of the engineering principles, technologies, and practices that underpin this vital aspect of our daily lives. Whether you're a curious non-specialist, an avid reader with a thirst for knowledge, or a librarian or bookseller seeking an invaluable resource, Gönen's masterwork will both enlighten and captivate you. An early leader in the academic market, this book provides an overview of classical planning for electric power distribution systems, which has been used for many years in designing and analyzing electric power distribution systems. The authors have taken a bold initiative to update the content, incorporating relevant aspects reflecting the advancements of today's evolving smart grid. Within its pages, readers will discover detailed discussions on the principles of power distribution, including the fundamentals of power generation, transmission, and distribution. The authors provide detailed explanations of the various components and equipment used in distribution systems, such as transformers, circuit breakers, switches, and protective devices. As part of the book, planning for the distribution network involves sizing and considering candidate geographical locations/regions in relation to the capacity of existing infrastructure, allowing for new additions to be built. For example, this includes locations either extending another feeder from distribution substations or building new distribution substations, depending on what makes more sense. Many assumptions have been made for non-existing distribution feeders to calculate ballpark figures for determining voltage profile and power losses if they were to be constructed. Readers will gain insights into how these considerations translate into net positive, net negative, or net-zero loads. All of these aspects can be gradually integrated with renewable energy sources, innovative grid technologies, and distribution automation over time. The authors involved in this book have made significant contributions to the state-of-the-art development by incorporating recent updates from the literature, thereby addressing the latest advancements. One remarkable feature of Turan Gönen's Electric Power Distribution System Engineering is its strong focus on practical applications and real-world scenarios. In addition to providing theoretical knowledge, the book also offers numerous examples that effectively bridge the gap between theory and practice. This unique approach enables readers to comprehend the intricacies of distribution system engineering and apply their newfound knowledge to solve complex problems in the field. By seamlessly blending theoretical foundations with practical insights, Gonen's book emerges as an indispensable resource for aspiring engineers, professionals, and researchers, as it offers a comprehensive understanding of electric power distribution systems and their practical implications.

Download or read book New Control Algorithms for the Robust Operation and Stabilization of Active Distribution Networks written by Maher Abdelkhalek and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Renewable Integrated Power System Stability and Control written by Hêmin Golpîra and published by John Wiley & Sons. This book was released on 2021-03-24 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: RENEWABLE INTEGRATED POWER SYSTEM STABILITY AND CONTROL Discover new challenges and hot topics in the field of penetrated power grids in this brand-new interdisciplinary resource Renewable Integrated Power System Stability and Control delivers a comprehensive exploration of penetrated grid dynamic analysis and new trends in power system modeling and dynamic equivalencing. The book summarizes long-term academic research outcomes and contributions and exploits the authors’ extensive practical experiences in power system dynamics and stability to offer readers an insightful analysis of modern power grid infrastructure. In addition to the basic principles of penetrated power system modeling, model reduction, and model derivation, the book discusses inertia challenge requirements and control levels, as well as recent advances in visualization of virtual synchronous generators and their associated effects on system performance. The physical constraints and engineering considerations of advanced control schemes are deliberated at length. Renewable Integrated Power System Stability and Control also considers robust and adaptive control strategies using real-time simulations and experimental studies. Readers will benefit from the inclusion of: A thorough introduction to power systems, including time horizon studies, structure, power generation options, energy storage systems, and microgrids An exploration of renewable integrated power grid modeling, including basic principles, host grid modeling, and grid-connected MG equivalent models A study of virtual inertia, including grid stability enhancement, simulations, and experimental results A discussion of renewable integrated power grid stability and control, including small signal stability assessment and the frequency point of view Perfect for engineers and operators in power grids, as well as academics studying the technology, Renewable Integrated Power System Stability and Control will also earn a place in the libraries of students in Electrical Engineering programs at the undergraduate and postgraduate levels who wish to improve their understanding of power system operation and control.

Download or read book The Proceedings of the 17th Annual Conference of China Electrotechnical Society written by Qingxin Yang and published by Springer Nature. This book was released on 2023-03-28 with total page 1408 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers outstanding papers presented at the 17th Annual Conference of China Electrotechnical Society, organized by China Electrotechnical Society (CES), held in Beijing, China, from September 17 to 18, 2022. It covers topics such as electrical technology, power systems, electromagnetic emission technology, and electrical equipment. It introduces the innovative solutions that combine ideas from multiple disciplines. The book is very much helpful and useful for the researchers, engineers, practitioners, research students, and interested readers.

Download or read book Flexible and Active Distribution Networks written by Peng Li and published by Frontiers Media SA. This book was released on 2021-08-02 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Distribution System Modeling and Analysis written by William H. Kersting and published by CRC Press. This book was released on 2001-08-31 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: For decades, distribution engineers did not have the sophisticated tools developed for analyzing transmission systems-often they had only their instincts. Things have changed, and we now have computer programs that allow engineers to simulate, analyze, and optimize distribution systems. Powerful as these programs are, however, without a real unders

Download or read book Coordinated Voltage and Reactive Power Control for Renewable Dominant Smart Distribution Systems written by Monsef Tahir and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Driven by their economic and environmental advantages, smart grids promote the deployment of active components, including renewable energy sources (RESs), energy storage systems (ESSs), and electric vehicles (EVs), for sustainability and environmental benefits. As a result of smart grid technologies and the amount of data collected by smart meters, better operation and control schemes can be developed to allow for cleaner energy with high efficiency, and without breaching network operating constraints. Power distribution networks may face some operational and control challenges as the integration of intermittent energy sources (wind and PV power systems) increases. Some of these challenges include voltage rise and fluctuation, reverse power flow, and the malfunction of conventional Volt/Var control devices. Depending on their location, RESs may introduce two issues related to the Volt/Var control problem, the first of which is that the severity of loading variations will be greater than the case without RESs. The second occurs when the RES is connected between the load center and any regulating devices. The power in-feed from the intermittent RESs may not only mislead the regulator's control circuit, resulting in unfavorable voltage, but may also enforce the regulator taps to operate randomly following bus voltage variations. This thesis investigates and presents a methodology for the Volt/Var control problem in Smart Distribution Grids (SDGs) under the high penetration and fluctuation of RESs. The research involves the application of predictive control actions to optimally set Volt/Var control devices before the predicted voltage violation takes place. The main objective of this controller is to manage and control the operation of Volt/Var devices in an optimal way that improves the voltage profile along the feeders, reduces real power losses and minimizes the number of Volt/Var device taps and/or switching movements under all loading conditions and for high penetration RESs. This thesis first presents a very Short-Term Stacking Ensemble (STSE) forecasting model for solar PV and wind power outputs that is developed to predict the generated power for intervals of 15 minutes. The proposed model combines heterogeneous machine learning algorithms composed of three well-established models: Support Vector Regression (SVR); Radial Basis Function Neural Network (RBFNN); and Random Forest (RF) heuristically via SVR. The STSE model aims to minimize the prediction error associated with renewable resources when used in the real-time operation of power distribution networks. Secondly, a day-ahead Predictive Volt/Var Control (PVVC) model is developed to find the optimal coordination between Volt/Var control devices under the high penetration and power variations of RESs. The objective of the PVVC model is defined as simultaneous minimization of voltage deviation at each bus, power losses, operating cycle of regulation equipment, and RES curtailment. The benefit of using smart inverter interface RESs with the capability of injective/absorbing reactive power is examined and applied as ancillary services for voltage support. Thirdly, a Sequential Predictive Control (SPC) Strategy for smart grids is developed. The model uses the past and currently available data to forecast demand and RES outputs for intervals of 15 minutes, with real-time updating mechanisms. It then schedules the settings and operations of Volt/Var control devices by solving the Volt/Var control problem in a rolling horizon optimization framework. Because the optimization must be solved in a short interval with a global solution, a solution methodology for linearizing the nonlinear optimization problem is adapted. The original control problem, which is a Mixed-Integer Nonlinear Programming (MINLP) optimization problem, is transformed into a Mixed Integer Second Order Conic Programming (MISOCP) problem that guarantees a global solution through convexity and remarkably reduces the computational burden. Case studies carried out to compare the proposed model against state-of-the-art models provides evidence for the proposed model's effectiveness. Results indicate that the SPC is capable of accurately solving the control problem within small time slots. The proposed models aim to efficiently operate SDGs at a high penetration level of RES for a day-ahead, as well as in real-time, depending on the preference of network operators. The primary purpose is to minimize operating costs while increasing the efficiency and lifespan of Volt/Var control devices.

Download or read book Advanced Technologies for Planning and Operation of Prosumer Energy Systems volume III written by Bin Zhou and published by Frontiers Media SA. This book was released on 2024-07-30 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prosumers, such as energy storage, smart home, and microgrids, are the consumers who also produce and share surplus energy with other users. With capabilities of flexibly managing the generation, storage and consumption of energy in a simultaneous manner, prosumers can help improve the operation efficiency of smart grid. Due to the rapid expansion of prosumer clusters, the planning and operation issues of prosumer energy systems have been increasingly raised. Aspects including energy infrastructure design, energy management, system stability, etc., are urgently required to be addressed while taking full advantage of prosumers' capabilities. However, up to date, the research on prosumers has not drawn sufficient attention. This proposal presents the need to introduce a Research Topic on prosumer energy systems in Frontiers in Energy Research. We believe this Research Topic can promote the research on advanced planning and operation technologies of prosumer energy systems and contribute to the carbon neutrality for a sustainable society.