Download or read book Development of Adaptive Voltage Control System for Distribution System with Distributed Generation written by Rashid El-Feres and published by . This book was released on 2008 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Adaptive Voltage Control Methods Using Distributed Energy Resources written by Huijuan Li and published by . This book was released on 2010 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Distributed energy resources (DE) with power electronics interfaces and logic control using local measurements are capable of providing reactive power related to ancillary system services. In particular, local voltage regulation has drawn much attention in regards to power system reliability and voltage stability, especially from past major cascading outages. This dissertation addresses the challenges of controlling the DEs to regulate the local voltage in distribution systems. First, an adaptive voltage control method has been proposed to dynamically modify the control parameters of a single DE to respond to system changes such that the ideal response can be achieved. Theoretical analysis shows that a corresponding formulation of the dynamic control parameters exists; hence, the adaptive control method is theoretically solid. Also, the field experiment test results at the Distributed Energy Communications and Controls (DECC) Laboratory in single DE regulation case confirm the effectiveness of this method. Then, control methods have been discussed in the case of multiple DEs regulating voltages considering the availability of communications among all the DEs. When communications are readily available, a method is proposed to directly calculate the needed adaptive change of the DE control parameters in order to achieve the ideal response. When there is no communication available, an approach to adaptively and incrementally adjust the control parameters based on the local voltage changes is proposed. Since the impact from other DEs is implicitly considered in this approach, multiple DEs can collectively regulate voltages closely following the ideal response curve. Simulation results show that each method, with or without communications, can satisfy the fast response requirement for operational use without causing oscillation, inefficiency or system equipment interference, although the case with communication can perform even faster and more accurate. Since the proposed adaptive voltage regulation method in the case of multiple DEs without communication, has a high tolerance to real-time data shortage and can still provide good enough performance, it is more suitable for broad utility applications. The approach of multiple DEs with communication can be considered as a high-end solution, which gives faster and more precise results at a higher cost.

Download or read book Embedded Generation written by Nicholas Jenkins and published by IET. This book was released on 2000-06-30 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, intended for both students and practising engineers, addresses all the issues pertinent to the implementation of embedded generation.

Download or read book Distributed Energy Systems written by Ashutosh K. Giri and published by CRC Press. This book was released on 2022-12-30 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides the insight of various topology and control algorithms used for power control in distributed energy power conversion systems such as solar, wind, and other power sources. It covers traditional and advanced control algorithms of power filtering including modelling and simulations, and hybrid power generation systems. The adaptive control, model predictive control, fuzzy-based controllers, Artificial Intelligence-based control algorithm, and optimization techniques application for estimating the error regulator gains are discussed. Features of this book include the following: Covers the schemes for power quality enhancement, and voltage and frequency control. Provides complete mathematical modelling and simulation results of the various configurations of the renewable energy-based distribution systems. Includes design, control, and experimental results. Discusses mathematical modelling of classical and adaptive control techniques. Explores recent application of control algorithm and power conversion. This book is aimed at researchers, professionals, and graduate students in power electronics, distributed power generation systems, control engineering, Artificial Intelligent-based control algorithms, optimization techniques, and renewable energy systems.

Download or read book Integration of Distributed Generation in the Power System written by Math H. J. Bollen and published by John Wiley & Sons. This book was released on 2011-08-09 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: The integration of new sources of energy like wind power, solar-power, small-scale generation, or combined heat and power in the power grid is something that impacts a lot of stakeholders: network companies (both distribution and transmission), the owners and operators of the DG units, other end-users of the power grid (including normal consumers like you and me) and not in the least policy makers and regulators. There is a lot of misunderstanding about the impact of DG on the power grid, with one side (including mainly some but certainly not all, network companies) claiming that the lights will go out soon, whereas the other side (including some DG operators and large parks of the general public) claiming that there is nothing to worry about and that it's all a conspiracy of the large production companies that want to protect their own interests and keep the electricity price high. The authors are of the strong opinion that this is NOT the way one should approach such an important subject as the integration of new, more environmentally friendly, sources of energy in the power grid. With this book the authors aim to bring some clarity to the debate allowing all stakeholders together to move to a solution. This book will introduce systematic and transparent methods for quantifying the impact of DG on the power grid.

Download or read book New Control Algorithms for the Distributed Generation Interface in Grid connected and Micro grid Systems written by Yasser Abdel-Rady Ibrahim Mohamed and published by . This book was released on 2008 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: Driven by economic, technical, and environmental reasons, the energy sector is moving into an era where large portions of increases in electrical energy demand will be met through widespread installation of distributed resources or what's known as distributed generation (DG). DG units can operate in parallel to the main grid or in a micro-grid mode. The later is formed by a cluster of DG units connected to a distribution network to maintain the reliability of critical loads, mainly when the grid supply is not available. Distributed resources include variable frequency sources, high frequency sources, and direct energy conversion sources producing dc voltages or currents. The majority of distributed resources are interfaced to the utility grid or to the customer load via dc-ac pulse-width-modulated (PWM) voltage source inverter (VSI) systems. However, these interfaces introduce new issues, such as the absence of the physical inertia, wide-band of dynamics, limited overload capability, susceptibility to parameters variation, and switching harmonics generation. In addition, the uncertain and dynamic nature of the distribution network challenges the stability and control effectiveness of a grid-connected inverter-based DG interface. Generally, difficulties appear in the form of grid impedance and interfacing parameter variations, fast and slow grid-voltage disturbances, grid distortion and unbalance, and interactions between the inverter ac-side filter and the grid. On the other hand, a micro-grid system will be dominated by inverter-based DG units. Unlike conventional power system generators, inverter-based DG units have no physical inertia. This fact makes the micro-grid system potentially susceptible to oscillations resulting from system disturbances. Severe and random disturbances might be initiated in a micro-grid system, due to load changes, the power sharing mechanism of the inverters and other generators, and interactions between the DG interface and the network. Motivated by the aforementioned difficulties, this thesis presents new control algorithms for the DG interface that guarantee stable and high power quality injection under the occurrence of network disturbances and uncertainties, in both the grid-connected and micro-grid systems.

Download or read book Modeling and Optimization of Renewable Energy Systems written by Arzu Şencan and published by BoD – Books on Demand. This book was released on 2012-05-11 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book includes solar energy, wind energy, hybrid systems, biofuels, energy management and efficiency, optimization of renewable energy systems and much more. Subsequently, the book presents the physical and technical principles of promising ways of utilizing renewable energies. The authors provide the important data and parameter sets for the major possibilities of renewable energies utilization which allow an economic and environmental assessment. Such an assessment enables us to judge the chances and limits of the multiple options utilizing renewable energy sources. It will provide useful insights in the modeling and optimization of different renewable systems. The primary target audience for the book includes students, researchers, and people working on renewable energy systems.

Download or read book Feeder Voltage Control in the Presence of Distributed Generation written by Aasheesh Deshmukh and published by . This book was released on 2017 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although integration of distributed generation (DG) with distribution system has many advantages, at the same time there are many challenges to be faced. One of the major challenges is voltage regulation. In traditional distribution system without distributed generation, step voltage regulators and capacitor banks are used to regulate voltage to maintain node voltages under required limits. When distributed generation is added to the distribution system, controlling node voltages will be a challenging task especially due to variable and uncontrolled nature of output of distributed generators. This thesis work studies the effects of distributed generation on voltage drop and node voltages, using Institute of Electrical and Electronics Engineers (IEEE) 13-node test feeder. Based on simulation results, reduction in voltage drop and rise of node voltages are identified. With the presence of communication based control of distributed generators, voltage regulation can be done more efficiently. Therefore, this work focuses on developing a model to show the relationship between voltage drop and real and reactive powers, and developing a voltage optimization technique where real and reactive powers of distributed generators are controlled. The proposed technique is tested using IEEE 13-node test feeder and the results show that the proposed technique will control the feeder voltage under prescribed limits and minimize total voltage drop, real and reactive power losses.

Download or read book Development of Three phase Continuation Power Flow for Voltage Stability Analysis of Distribution Systems written by Dina Khaniya and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: With distributed generation being introduced in the meshed distribution networks under increased loading conditions, maintaining the system voltage stability will become one of the major concerns. The conventional approach of repetitive power flow solutions fails to obtain the critical loading point as Jacobian becomes singular before maximum loading point. Continuation power flow methods, based on the predictor-corrector scheme, overcome this difficulty with the use of parameterization techniques. Continuation power flow tools, already developed for transmission systems, need to be extended to handle three phase unbalanced distribution systems. This research work contributes towards development of a robust and efficient three phase unbalanced continuation power flow tool for voltage stability assessment of shipboard power systems and terrestrial distribution systems. The developed continuation power flow method is based on adaptive step length control and pseudo arc length/local parameterization technique, which have been tested on several IEEE test systems and a shipboard power system.

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 Voltage Control and Voltage Stability of Power Distribution Systems in the Presence of Distributed Generation written by Ferry August Viawan and published by . This book was released on 2008 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book DEVELOPMENT OF THREE PHASE CONTINUATION POWER FLOW FOR VOLTAGE STABILITY ANALYSIS OF DISTRIBUTION SYSTEMS written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: With distributed generation being introduced in the meshed distribution networks under increased loading conditions, maintaining the system voltage stability will become one of the major concerns. The conventional approach of repetitive power flow solutions fails to obtain the critical loading point as Jacobian becomes singular before maximum loading point. Continuation power flow methods, based on the predictor-corrector scheme, overcome this difficulty with the use of parameterization techniques. Continuation power flow tools, already developed for transmission systems, need to be extended to handle three phase unbalanced distribution systems. This research work contributes towards development of a robust and efficient three phase unbalanced continuation power flow tool for voltage stability assessment of shipboard power systems and terrestrial distribution systems. The developed continuation power flow method is based on adaptive step length control and pseudo arc length/local parameterization technique, which have been tested on several IEEE test systems and a shipboard power system.

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 Power System Simulation Control and Optimization written by José Antonio Domínguez-Navarro and published by MDPI. This book was released on 2021-06-21 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Special Issue “Power System Simulation, Control and Optimization” offers valuable insights into the most recent research developments in these topics. The analysis, operation, and control of power systems are increasingly complex tasks that require advanced simulation models to analyze and control the effects of transformations concerning electricity grids today: Massive integration of renewable energies, progressive implementation of electric vehicles, development of intelligent networks, and progressive evolution of the applications of artificial intelligence.

Download or read book Advances in Distributed Energy Resources Aggregation for the Low Carbon Future written by Qinran Hu and published by Frontiers Media SA. This book was released on 2023-02-15 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Decision Making Applications in Modern Power Systems written by Shady H.E. Abdel Aleem and published by Academic Press. This book was released on 2019-09-21 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: Decision Making Applications in Modern Power Systems presents an enhanced decision-making framework for power systems. Designed as an introduction to enhanced electricity system analysis using decision-making tools, it provides an overview of the different elements, levels and actors involved within an integrated framework for decision-making in the power sector. In addition, it presents a state-of-play on current energy systems, strategies, alternatives, viewpoints and priorities in support of decision-making in the electric power sector, including discussions of energy storage and smart grids. As a practical training guide on theoretical developments and the application of advanced methods for practical electrical energy engineering problems, this reference is ideal for use in establishing medium-term and long-term strategic plans for the electric power and energy sectors. Provides panoramic coverage of state-of-the-art energy systems, strategies and priorities in support of electrical power decision-making Introduces innovative research outcomes, programs, algorithms and approaches to address challenges in understanding, creating and managing complex techno-socio-economic engineering systems Includes practical training on theoretical developments and the application of advanced methods for realistic electrical energy engineering problems

Download or read book Integration of Distributed Generation in the Power System written by Math H. J. Bollen and published by John Wiley & Sons. This book was released on 2011-08-04 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: The integration of new sources of energy like wind power, solar-power, small-scale generation, or combined heat and power in the power grid is something that impacts a lot of stakeholders: network companies (both distribution and transmission), the owners and operators of the DG units, other end-users of the power grid (including normal consumers like you and me) and not in the least policy makers and regulators. There is a lot of misunderstanding about the impact of DG on the power grid, with one side (including mainly some but certainly not all, network companies) claiming that the lights will go out soon, whereas the other side (including some DG operators and large parks of the general public) claiming that there is nothing to worry about and that it's all a conspiracy of the large production companies that want to protect their own interests and keep the electricity price high. The authors are of the strong opinion that this is NOT the way one should approach such an important subject as the integration of new, more environmentally friendly, sources of energy in the power grid. With this book the authors aim to bring some clarity to the debate allowing all stakeholders together to move to a solution. This book will introduce systematic and transparent methods for quantifying the impact of DG on the power grid.