Modelling Flexible Ac Transmission Systems Facts Devices On Weak Transmission Lines In The Nigerian Power Network
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Modelling Flexible Ac Transmission Systems Facts Devices On Weak Transmission Lines In The Nigerian Power Network
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Author : Olalekan Olagunju
language : en
Publisher: GRIN Verlag
Release Date : 2020-02-26
Modelling Flexible Ac Transmission Systems Facts Devices On Weak Transmission Lines In The Nigerian Power Network written by Olalekan Olagunju and has been published by GRIN Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-02-26 with Technology & Engineering categories.
Research Paper (postgraduate) from the year 2019 in the subject Electrotechnology, , language: English, abstract: The aim of the study is to model FACTS devices on weak transmission line in the Nigeria power network and consider their effect on the bus voltages, reactive and active power using genetic algorithm(GA) approach for loss minimization. The Nigeria 330KV existing network to be considered consist of nine (9) generating stations, thirty(30)Buses and forty one (41) transmission lines which will be modelled and simulated using Matlab Version 7.10. The study is limited to Nigeria 330kV existing power network with the focus on the comparison of the Bus voltages and power flow on the transmission lines when FACTS devices are incorporated and when the FACTS devices are not incorporated. Research Questions: For the realization of the objectives mentioned above and the aim, the following research questions were set as a guide: 1. What is the significant effect of FACTS devices on weak transmission lines? 2. Can FACTS device be used with genetic algorithm for optimization of power loss and improvement of the bus voltages? 3. What is the limitation of using just genetic algorithm without FACTS device for the optimization of power loss and the improvement of the bus voltages? This research work is divided into five chapters with each chapter buttressing more on minimization of power loss. The scope of the work , the objective and aim of the research work to be achieved is addressed in chapter one (1). Chapter two(2) focus on the literature review of other researchers on FACTS device in the improvement of the power network, the concept of FACTS device and the choice of FACTS device to be used was also addressed in chapter two (2) of this research work. Chapter three focus on the methodology used for this study. The simulation of the 330kV Nigeria power network was done on MATLAB /SIMULINK 7.5. Also the chapter three focused on the use of power flow analysis toolbox which is a collection of a written codes of m files that has a compatible interface with MATLAB to generate the load flow of the power network instead of using ETAP. The genetic algorithm was also discussed as an optimization tool deployed to optimize the losses on the transmission line. Chapter four focus on the research findings with possible explanation as to some of the result obtained. Finally chapter five talks about the conclusion of this research work and highlight some areas to explore in the future.
Flexible Ac Transmission Systems Facts
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Author : Suman Bhowmick
language : en
Publisher: CRC Press
Release Date : 2018-09-03
Flexible Ac Transmission Systems Facts written by Suman Bhowmick and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-09-03 with Technology & Engineering categories.
Flexible AC Transmission Systems (FACTS): Newton Power-Flow Modeling of Voltage-Sourced Converter-Based Controllers introduces different voltage-sourced converter (VSC)-based FACTS controllers and VSC-based high-voltage direct current (VSC-HVDC) systems and their working principles, explaining how FACTS controllers exchange real and reactive power with systems. Subsequently, the book: Describes the Newton–Raphson method and its application for solving the power-flow problem Presents the Newton power-flow modeling of the static synchronous series compensator (SSSC), unified power-flow controller (UPFC), interline power-flow controller (IPFC), generalized unified power-flow controller (GUPFC), and static synchronous compensator (STATCOM), accommodating the practical device constraint limits (because of the unique modeling strategy, the existing Newton power-flow codes can be reused) Develops a unified Newton power-flow model of AC systems incorporating multiterminal VSC-HVDC systems with pulse-width modulation (PWM) control schemes, directly yielding the VSC modulation indices from the power-flow solution Provides numerous case studies for validation of Newton power-flow models, elaborating on the occurrences and checking of unrealistic power-flow solutions in isolated cases Includes detailed derivations of all the difficult formulae as well as solved problems on typical VSC-based FACTS controllers Flexible AC Transmission Systems (FACTS): Newton Power-Flow Modeling of Voltage-Sourced Converter-Based Controllers assumes at least an undergraduate-level understanding of engineering mathematics, network analysis, electrical machines, electrical power systems, and power electronics. Thus, the book provides a valuable reference for practitioners as well as senior-undergraduate and graduate students in electrical engineering and electrical power systems.
Flexible Ac Transmission Systems Facts
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Author : Yong-Hua Song
language : en
Publisher: IET
Release Date : 1999
Flexible Ac Transmission Systems Facts written by Yong-Hua Song and has been published by IET this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Technology & Engineering categories.
Provides a comprehensive guide to FACTS, covering all the major aspects in research and development of FACTS technology.
Understanding Facts
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Author : Narain G. Hingorani
language : en
Publisher: Wiley-IEEE Press
Release Date : 2000
Understanding Facts written by Narain G. Hingorani and has been published by Wiley-IEEE Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Technology & Engineering categories.
The Flexible AC Transmission System (FACTS)--a new technology based on power electronics--offers an opportunity to enhance controllability, stability, and power transfer capability of ac transmission systems. Two pioneers in the field provide in-depth discussions on power semiconductor devices, voltage-sourced and current-sourced converters, specific FACTS controllers, and major FACTS applications in the U.S.
Modelling Control And Design Of Flexible Ac Transmission System Facts Custom Power Devices And Variable Speed Drives For Transmission And Distribution Architectures
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Author : Nikolaos P. Athanasiadis
language : en
Publisher:
Release Date : 1999
Modelling Control And Design Of Flexible Ac Transmission System Facts Custom Power Devices And Variable Speed Drives For Transmission And Distribution Architectures written by Nikolaos P. Athanasiadis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.
Modelling Control And Design Of Flexible Ac Transmission Systems Facts Custom Power Devices And Variable Speed Drives For Transmission And Distribution Architectures
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Author : Nikolaos P. Athanasiadis
language : en
Publisher:
Release Date : 2000
Modelling Control And Design Of Flexible Ac Transmission Systems Facts Custom Power Devices And Variable Speed Drives For Transmission And Distribution Architectures written by Nikolaos P. Athanasiadis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.
Modelling And Control Of Flexible Ac Transmission Systems Facts
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Author :
language : en
Publisher:
Release Date : 2005
Modelling And Control Of Flexible Ac Transmission Systems Facts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
An Investigation Of The Impact Of Distributed Flexible Ac Transmission System D Facts Devices On Transmission Line Protection
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Author : Hussain Beleed
language : en
Publisher:
Release Date : 2020
An Investigation Of The Impact Of Distributed Flexible Ac Transmission System D Facts Devices On Transmission Line Protection written by Hussain Beleed and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with Electric power distribution categories.
This thesis explores the effects of inductive Distributed Flexible AC Transmission System (D-FACTS) device implementations on the performance of different transmission line protection schemes. The reliability and sensitivity of the trip decision of the protection elements is crucial for delivering safe and reliable power to customers. Furthermore, accurate fault location information can help significantly reduce outage duration, operating costs, and the number of consumer complaints. Inductive D-FACTS devices offer a distributed solution for managing and relieving the congestion in transmission lines. However, their interaction with protection and fault location elements may potentially cause unnecessary tripping, relay mis-operation, or misleading fault location information. The operation of these devices may also lead to unpredictable changes in transmission line impedance and fault current limitation due to their dynamic behavior before and during the disturbances. This work studies these negative aspects of D-FACTS devices and proposes solutions and alternatives to mitigate their impact.An inductive D-FACTS model was developed in the ATP version of the Electromagnetic Transients Program (EMTP) and then the steady-state performance of these devices was validated against the existing D-FACTS model in PowerWorld using the IEEE 12 bus test system. Once the model was validated, a more practical system with D-FACTS implementation is simulated using ATP. Lastly, the generated fault event files are played back into commercial relays and a protective relay software model for evaluation.This work examines the influence of two different implementations of inductive D-FACTS on the most common protection elements and schemes under different fault scenarios. The types of D-FACTS devices implementations studied were: dispersed (distributing the D-FACTS along the length of the line) and compressed (distributing them at specific distances on the line). Additionally, the impact of placing D-FACTS devices on adjacent lines was studied. Protection schemes studied in this thesis include distance elements (mho or quadrilateral elements), communication aided distance schemes (permissive overreaching transfer trip [POTT]), and fault location schemes. Furthermore, the influence of fault resistance and mutual coupling between parallel lines on relay response is studied in the presence of D-FACTS devices.Dispersed or compressed D-FACTS implementation can cause underreaching of distance elements. This may lead to a delay in the tripping time or in fact, a failure to trip in a POTT scheme. The simulation results show that using dispersed D-FACTS implementation can reduce the error compared to the compressed implementation, and increase the ability of performing correction for these devices under some operating conditions. This work also examined the effect of D-FACTS devices on distance elements' performance in presence of a fault resistance and mutual coupling between the parallel lines. The results illustrated how the direction of the power flow influences the fault resistance coverage of distance elements in the presence of D-FACTS devices. The D-FACTS may help to reduce the distance elements' underreach for forward faults and increase the underreach behavior for the reverse fault. The results show that mutual coupling influence on distance elements would be not impacted by addition of the D-FACTS devices.Lastly, we investigated how implementing inductive D-FACTS devices on the adjacent line affects the dynamic behavior of mho distance elements and the calculated effective impedance tilt of quadrilateral distance elements' response. Inserting the D-FACTS behind the relay can help expand the mho circles for forward faults and contract them for reverse faults. As a result, fault resistance coverage can be improved. On the other hand, this may cause underreaching or overreaching of the quadrilateral distance elements' response when a fault resistance is present in a ground fault.To deal with the challenges in the implementation of D-FACTS devices and minimize their influence on transmission line protection system performance, this thesis proposes mitigation for creating reliable protection and fault location schemes. The work concludes by offering recommendations for D-FACTS device implementation and protective relays' settings.
Flexible Ac Transmission System Facts
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Author : Florida Power Corporation
language : en
Publisher:
Release Date : 1993
Flexible Ac Transmission System Facts written by Florida Power Corporation and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with categories.
Introduction To Flexible Ac Transmission System Facts
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Author : Subhransu Sekhar Dash
language : en
Publisher: Alpha Science International, Limited
Release Date : 2020-01-30
Introduction To Flexible Ac Transmission System Facts written by Subhransu Sekhar Dash and has been published by Alpha Science International, Limited this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-01-30 with Technology & Engineering categories.