Allowing Distributed Generation To Improve Power System Stability By Applying Virtual Synchronous Machine Approach PDF Download
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| Author | : Mohamed M. Abuagreb |
| Publisher | : |
| Total Pages | : 408 |
| Release | : 2020 |
| Genre | : Distributed generation of electric power |
| ISBN | : |
Download Allowing Distributed Generation to Improve Power System Stability by Applying Virtual Synchronous Machine Approach Book in PDF, ePub and Kindle
The installed power capacity of DG is increasing; many of distributed generators are connected to a grid by inverters. The DC/AC inverters are controlled by a Phase Locked Loop (PLL) so they can be synchronized with power system frequency. If this capacity becomes larger, the grid power system become unstable, because the inverter is controlled to follow the power grid frequency. Performance of a photovoltaic generation (PV) plant with an integrated battery energy storage system (BESS) is examined under different system conditions. Although the penetration of distributed renewable energy sources into the traditional grid has risen over the past decade, the potential negative impact of this integration can never be overemphasized. The proposed scheme is evaluated in system studies under fluctuating levels of solar irradiation related to the weather conditions. As the changes in irradiation and temperature occur, the dc link voltage changes due to the changes in power produced, the inverter ac power is controlled to regulate the dc voltage. This research models are energy management system which is based on a hysteresis control algorithm for the battery, which limits the abrupt charging/discharging of the battery, thus increasing battery lifespan which also compensating for change in PV output and power system conditions. The PV source does not have significant energy storage. However, it can supply small quantity of energy for the grid system because it has dc capacitor located in the dc link. Separate energy storage, such as a battery, can work with a PV source to supply energy for the frequency control. In addition, with increasing penetration of the inverter based power generation, there is decrease in inertia due to the fast frequency tracking of the PLL, which speed up dynamic behavior and stability problems on the power grid. To mitigate this problem, the integration of virtual synchronous generators (VSG) based on the photovoltaic (PV) generation plus energy storage is proposed. This research implemented the VSG control based on the swing equation model of a synchronous generator. The VSG can be designed to aid the integration of large-scale photovoltaic generation into the power grid. Through this concept, it is plausible for the DG to exhibit the characteristics and behavior of synchronous generators (SG) such as inertia behaviour, droop functions and damping. These factors make it possible for the PV to contribute to the control and stability of the power grid.The work also presents a proposed a simple method calculating approximate for approximating battery sizing with respect to power and energy by providing emulation inertia in order to meet the target system inertia and power/frequency characteristics. Three cases were simulated in order to calculate the amount of the battery energy sizing needed to support the power grid inertia which reduces the rate of change of frequency deviation. These models are designed and simulated in the electromagnetic alternate transients program (ATP) to simulate the power system. The power grid is testing with the ATP program and validated with powerworld simulator.
| Author | : Thongchart Kerdphol |
| Publisher | : Springer Nature |
| Total Pages | : 259 |
| Release | : 2020-11-28 |
| Genre | : Technology & Engineering |
| ISBN | : 3030579611 |
Download Virtual Inertia Synthesis and Control Book in PDF, ePub and Kindle
This book provides a thorough understanding of the basic principles, synthesis, analysis, and control of virtual inertia systems. It uses the latest technical tools to mitigate power system stability and control problems under the presence of high distributed generators (DGs) and renewable energy sources (RESs) penetration. This book uses a simple virtual inertia control structure based on the frequency response model, complemented with various control methods and algorithms to achieve an adaptive virtual inertia control respect to the frequency stability and control issues. The chapters capture the important aspects in virtual inertia synthesis and control with the objective of solving the stability and control problems regarding the changes of system inertia caused by the integration of DGs/RESs. Different topics on the synthesis and application of virtual inertia are thoroughly covered with the description and analysis of numerous conventional and modern control methods for enhancing the full spectrum of power system stability and control. Filled with illustrative examples, this book gives the necessary fundamentals and insight into practical aspects. This book stimulates further research and offers practical solutions to real-world power system stability and control problems with respect to the system inertia variation triggered by the integration of RESs/DGs. It will be of use to engineers, academic researchers, and university students interested in power systems dynamics, analysis, stability and control.
| Author | : Md Ashraful Islam |
| Publisher | : |
| Total Pages | : 79 |
| Release | : 2017 |
| Genre | : |
| ISBN | : |
Download IMPLEMENTATION OF VIRTUAL SYNCHRONOUS GENERATOR METHODOLOGIES FOR RENEWABLE INTEGRATION Book in PDF, ePub and Kindle
In conventional centralized power systems, power is generated mostly by large synchronous generators (SGs), where the frequency of the grid depends on the rotational frequency of the prime mover. If there are any sudden changes in the load, the rotor inertia property restrains the changes in frequency and keeps the system stable. During transient periods, rotor kinetic energy of the rotor is injected into the grid to balance power supply between generation and load. With the recent high penetration of renewable energy sources (RES), the power grid is undergoing structural changes with an increased inverter-based distributed generation. Since inverter based power sources do not have inertia as conventional synchronous machines (SM), high penetration of inverters may cause instability and sharp voltage fluctuations in the grid. If inverter based power sources could be configured as regular SM by introducing virtual inertia and damping property, many of the problems, such as frequency regulation, islanded operation, and parallel operation of inverter-based DGs will be resolved. This thesis investigates mathematical modeling and control of VSG's to emulate the inertia and damping property of SMs. Simulation results are presented on the modeling and closed-loop performance of VSGs for an island microgrid.
| Author | : Hassan Bevrani |
| Publisher | : John Wiley & Sons |
| Total Pages | : 799 |
| Release | : 2017-07-18 |
| Genre | : Science |
| ISBN | : 1119263700 |
Download Microgrid Dynamics and Control Book in PDF, ePub and Kindle
This book discusses relevant microgrid technologies in the context of integrating renewable energy and also addresses challenging issues. The authors summarize long term academic and research outcomes and contributions. In addition, this book is influenced by the authors’ practical experiences on microgrids (MGs), electric network monitoring, and control and power electronic systems. A thorough discussion of the basic principles of the MG modeling and operating issues is provided. The MG structure, types, operating modes, modelling, dynamics, and control levels are covered. Recent advances in DC microgrids, virtual synchronousgenerators, MG planning and energy management are examined. The physical constraints and engineering aspects of the MGs are covered, and developed robust and intelligent control strategies are discussed using real time simulations and experimental studies.
| Author | : Chu Sun |
| Publisher | : |
| Total Pages | : |
| Release | : 2021 |
| Genre | : |
| ISBN | : |
Download Virtual Synchronous Machine Control for Islanded Power System with Reduced Inertia Book in PDF, ePub and Kindle
"AC power network requires instantaneous power balance and proper frequency regulation to maintain stable and reliable operation. However, this becomes more and more challenging due to the increasingly high penetration of renewable generators resulting in reduced inertia. This thesis proposes virtual synchronous generator control strategies to provide frequency support in islanded microgrids while considering the limitations of energy storage and wind turbine generator wherein the control is implemented. Both DC and AC coupling schemes of energy storage installation are proposed for virtual synchronous machine control, namely coupling fast-acting energy storage and slow-acting storage with one common converter or two separate converters. Given the difference in the requirement of response speed, power and energy capacity, the control strategy can emulate the inertia and damping using fast-acting energy storage and the governor control of synchronous generator using slow-acting energy storage. The energy amount needed for inertia and damping is quantified, and an additional control is put forth to recover the energy losses. The proposed control strategy is validated with hardware testbench composed of real-time simulator and small-scale hardware prototype. The virtual synchronous machine control is then extended to type-IV wind turbine generator. The machine side dynamics and its further effect on the emulated inertia and damping is analyzed. The permissible inertia values at different wind speeds are also determined analytically to avoid damage to the generator. The control stability issues of single and multiple virtual synchronous generators are also studied. The difference between dynamic phasor model and quasi-static model of virtual synchronous machine in stability analysis is clarified. Slow-coherency theory and extended-equal-area-criterion approach are utilized to determine the oscillation group and mode classification for multiple converters. It is then shown that the mismatched parameters of multiple generators is the main cause resulting in inter-oscillation. An enhanced damping control design is proposed to alleviate the local oscillation modes and the inter-oscillation modes between virtual synchronous machines"--
| Author | : Ramesh Bansal |
| Publisher | : Springer |
| Total Pages | : 813 |
| Release | : 2017-03-07 |
| Genre | : Technology & Engineering |
| ISBN | : 3319513435 |
Download Handbook of Distributed Generation Book in PDF, ePub and Kindle
This book features extensive coverage of all Distributed Energy Generation technologies, highlighting the technical, environmental and economic aspects of distributed resource integration, such as line loss reduction, protection, control, storage, power electronics, reliability improvement, and voltage profile optimization. It explains how electric power system planners, developers, operators, designers, regulators and policy makers can derive many benefits with increased penetration of distributed generation units into smart distribution networks. It further demonstrates how to best realize these benefits via skillful integration of distributed energy sources, based upon an understanding of the characteristics of loads and network configuration.
| Author | : Antonio Carlos Zambroni de Souza |
| Publisher | : Springer Nature |
| Total Pages | : 523 |
| Release | : 2022-01-31 |
| Genre | : Technology & Engineering |
| ISBN | : 3030908127 |
Download Planning and Operation of Active Distribution Networks Book in PDF, ePub and Kindle
This book offers a broad and detailed view about how traditional distribution systems are evolving smart/active systems. The reader will be able to share the view of a number of researchers directly involved in this field. For this sake, philosophical discussions are enriched by the presentation of theoretical and computational tools. A senior reader may incorporate some concepts not available during his/her graduation process, whereas new Engineers may have contact with some material that may be essential to his/her practice as professionals.
| Author | : Math H. J. Bollen |
| Publisher | : John Wiley & Sons |
| Total Pages | : 526 |
| Release | : 2011-08-04 |
| Genre | : Technology & Engineering |
| ISBN | : 111802902X |
Download Integration of Distributed Generation in the Power System Book in PDF, ePub and Kindle
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.
| Author | : Sarat Kumar Sahoo |
| Publisher | : Frontiers Media SA |
| Total Pages | : 196 |
| Release | : 2023-12-08 |
| Genre | : Technology & Engineering |
| ISBN | : 2832541674 |
Download Recent Advances in Renewable Energy Automation and Energy Forecasting Book in PDF, ePub and Kindle
The advancement of sustainable energy is becoming an important concern for many countries. The traditional electrical grid supports only one-way interaction of power being delivered to the consumers. The emergence of improved sensors, actuators, and automation technologies has consequently improved the control, monitoring and communication techniques within the energy sector, including the Smart Grid system. With the support of the aforementioned modern technologies, the information flows in two-ways between the consumer and supplier. This data communication helps the supplier in overcoming challenges like integration of renewable technologies, management of energy demand, load automation and control. Renewable energy (RE) is intermittent in nature and therefore difficult to predict. The accurate RE forecasting is very essential to improve the power system operations. The forecasting models are based on complex function combinations that include seasonality, fluctuation, and dynamic nonlinearity. The advanced intelligent computing algorithms for forecasting should consider the proper parameter determinations for achieving optimization. For this we need, new generation research areas like Machine learning (ML), and Artificial Intelligence (AI) to enable the efficient integration of distributed and renewable generation at large scale and at all voltage levels. The modern research in the above areas will improve the efficiency, reliability and sustainability in the Smart grid.
| Author | : Jingyang Fang |
| Publisher | : Springer Nature |
| Total Pages | : 217 |
| Release | : 2020-09-10 |
| Genre | : Technology & Engineering |
| ISBN | : 9811585903 |
Download More-Electronics Power Systems: Power Quality and Stability Book in PDF, ePub and Kindle
This book aims to investigate emerging power quality and stability problems as well as their solutions in more-electronics power systems. The majority of methods presented here are validated through simulation and/or experimental results, thereby improving their credibility. The ultimate objective of these methods is to achieve secured operation of modern power systems with increased (up to 100%) renewable energy penetration, which is an emerging topic in this field. Readers will not only learn about the knowledge of more-electronics power systems but also the step-by-step process of how they can implement this to their research work or industrial practice. This book caters to engineers and academics working in the field of power systems with the main focus of improving power quality and stability.
