Download or read book Coordinated Volt Var Control in Smart Distribution System with Distributed Generators written by Fatima Binte Zia and published by . This book was released on 2015 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 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 Smart Operation for Power Distribution Systems written by Daniel Pinheiro Bernardon and published by Springer. This book was released on 2018-07-27 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses the operation of electrical distribution systems, presenting contemporary concepts and applications with a focus on integration for smart operation and grids. The authors address the main concepts and techniques of active management of smart electrical distribution system operation, including state estimation, self healing, volt-var control, protection systems, operations planning, and commercial and emergency dispatch. From each topic, an overview of concepts are given together with examples related to the management of these systems, thus providing a valuable resource for the design, implementation and management of efficient and truly sustainable smart systems.

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 Volt VAR Management for Transmission and Distribution Systems with Wind Energy written by Rahul Anilkumar and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Power Quality Enhancement in Distribution Networks with Distributed Generation written by Piyadanai Pachanapan and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis investigates and proposes novel solutions to enhance voltage quality in medium networks with increased distributed generation (DG) penetration, focusing on voltage level variations and harmonic distortion. A new hierarchical distributed voltage control structure is proposed for DG to facilitate autonomous integrated Volt-VAr control in medium networks with DG. It is implemented especially in converter-connected DG, and in addition to enhancing voltage quality, the proposed controller also reduces the need to install new compensation devices. A decentralised active voltage control is developed for DG units to provide short and long-term voltage compensation by manipulating their reactive power output. Local controllable zones (LCZs) are introduced and used to determine the voltage control boundaries for each DG unit, and a methodology is introduced to allow LCZ adapt and follow network changes in real time. The performance and value of the proposed LCZ identification method and voltage control approaches are demonstrated based on load-flow and transient simulations, under various network operating scenarios conducted in DigSILENT PowerFactory. A droop control and a coordinated controller between DG units and other voltage controllable devices is presented to enhance voltage controllability whilst minimizing voltage interaction between devices, in case more than one DG unit, in the same LCZ, supports voltage control at the same time. The proposed coordinated controller applies to DG units, and also to DG units and other voltage compensators such as the modern on-load tap changer (OLTC) and the solid-state transformer (SST). In this context, DG provides primary support, and the other devices concentrate on providing secondary voltage support. Also, a DG structure combining energy storage systems (ESS) is proposed to enhance voltage quality by controlling not only the reactive power output from the DG unit, but also either active or reactive power output of ESS, thus allowing the voltage control to be more effective in a wider range of scenarios. The control and operation of DG in cooperation with a voltage regulator (VR) is also investigated. The voltage regulator is assumed as the secondary voltage support to provide slow voltage control to a wider area, including LCZs, located behind its secondary side. Furthermore, the substation's OLTC can give the slow voltage support similar to the voltage regulator but it provides the wide-area voltage control to cover the whole network including those buses which do not belong to any LCZs. The coordinated voltage controller approach iv presented is demonstrated under various network operating scenarios using case studies based on the IEEE 33-bus radial distribution network. Harmonic distortion across the network when the number of converter-connected DG is increased is also investigated in the thesis. It is found that the increase of this type of DG can raise the level of harmonic distortion to above the statutory limits. A generic approach is adopted to reduce the harmonic injection from converter-connected DG units and non-linear loads, using a phase-shifting technique. By changing the vector group between transformers that connect either converter-connected DG or non-linear loads is operated off-line for selfharmonic cancellation, without physically modifying the existing converter unit. The case study is based on the typical 17-bus medium voltage Dutch network. The performance of the proposed harmonic mitigation solution is examined under various scenarios based on harmonic load flow calculations performed on the distribution network modelled in the harmonic domain.

Download or read book Integrated Volt Var Control on Smart Distribution Systems written by Yue Shi and published by . This book was released on 2018 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 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 2023 International Conference on Energy Engineering written by Zhe Chen and published by Springer Nature. This book was released on with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Flexible Electronics for Electric Vehicles written by Sunil Kumar Goyal and published by Springer Nature. This book was released on with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Heuristic Optimal Approach for Coordinated Volt var Control in Distribution Networks written by Lesiba Mokgonyana and published by . This book was released on 2014 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Electric Power Systems Research written by Ying-Yi Hong and published by MDPI. This book was released on 2018-04-06 with total page 373 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Electric Power Systems Research" that was published in Energies

Download or read book Operation of Distributed Energy Resources in Smart Distribution Networks written by Kazem Zare and published by Academic Press. This book was released on 2018-06-05 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Operation of Distributed Energy Resources in Smart Distribution Networks defines the barriers and challenges of smart distribution networks, ultimately proposing optimal solutions for addressing them. The book considers their use as an important part of future electrical power systems and their ability to improve the local flexibility and reliability of electrical systems. It carefully defines the concept as a radial network with a cluster of distributed energy generations, various types of loads, and energy storage systems. In addition, the book details how the huge penetration of distributed energy resources and the intermittent nature of renewable generations may cause system problems. Readers will find this to be an important resource that analyzes and introduces the features and problems of smart distribution networks from different aspects. - Integrates different types of elements, including electrical vehicles, demand response programs, and various renewable energy sources in distribution networks - Proposes optimal operational models for the short-term performance and scheduling of a distribution network - Discusses the uncertainties of renewable resources and intermittent load in the decision-making process for distribution networks

Download or read book E Mobility in Electrical Energy Systems for Sustainability written by D., Lakshmi and published by IGI Global. This book was released on 2024-03-04 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: As more and more communities around the world are turning to electric vehicles (EVs) to help the environment and save energy, we face a big challenge. The systems that deliver power to our homes and businesses are having a tough time keeping up, especially with the increasing use of EVs. This challenge is a major issue for the experts in the energy field who are working hard to figure out how to make sure our power systems stay reliable. The main goal for these experts right now is to create a strong, flexible system that can smoothly handle the integration of EVs, making sure the power flows well, the grid stays stable, and the systems remain eco-friendly. E-Mobility in Electrical Energy Systems for Sustainability is a comprehensive guide to navigating the complexities of e-mobility integration. Delving into crucial aspects such as architectural reconfiguration, restoration strategies, power quality control, and regulatory frameworks, the book provides solutions on how to address the challenges posed by the integration of EVs into distribution systems. Its examination of advanced technologies, including communication-enabled EV charging systems, battery management systems, and power grid cybersecurity measures, equips readers with the knowledge needed to start the transformative journey towards sustainable electric transportation. This book is a great resource for those seeking to understand, engage with, and contribute to the landscape of e-mobility integration.

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.