Download or read book Design and Simulation of Unified Power Flow Controller with Grid Storage written by Christopher Beaudoin and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Power flow between two transmission systems across an uncontrolled interface can be problematic if there is unequal sharing between the tie lines. System configuration changes such as generation dispatch, or out of service elements can cause thermal overloads. In addition, some weaker areas of the system which may have insufficient transmission can have difficultly supporting the voltage at buses with high loading particularly after the loss of one element. This thesis presents a real transmission system which has two problems: a thermal limitation caused by unequal tie-sharing across an uncontrolled interface, and a post-fault voltage stability concern. Various potential solutions are analyzed and shown to address one or the other of these two problems; none of which were capable of solving both. A Unified Power Flow Controller (UPFC) is proposed which can effectively address both problems and can provide additional benefit in the form of a grid storage interface. The operational characteristics of a UPFC are analyzed and used to develop an electrical model and control system topology. The model with its control system is implemented in PSCAD. The UPFC is proven to be capable of effectively addressing the thermal limitation and voltage stability issues of the system. Further, a battery is added to the UPFC to provide grid energy storage. Cost saving measures through controller design are also proposed and implemented. This work demonstrates that a UPFC can be an effective solution to typical problems (such as thermal and voltage constraints) faced by a transmission system. A UPFC with grid storage can also provide an alternative to building costly transmission lines or generation by enhancing reliability, reducing demand on generation cause by system peaks, smoothing intermittent generation, etc.

Download or read book Unified Power Flow Controller Technology and Application written by Jijun Yin and published by Academic Press. This book was released on 2017-06-16 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unified Power Flow Controller Technology and Application provides comprehensive coverage on UPFC technology, providing a range of topics, including design principle, control and protection, and insulation coordination. It summarizes all the most up-to-date research and practical achievements that are related to UPFC and MMC technology, including test techniques for main components, closed-loop test techniques for control and protection systems, and onsite techniques for implementing UPFC projects. The book is an essential reference book for both academics and engineers working in power system protection control, power system planning engineers, and HVDC FACTS related areas. Readers will not only obtain the detailed information regarding theoretical analysis and practical application of UPFC, but also the control mechanism of advanced MMC technology, both of which are not common topics in previously published books. Shows how to use modular multilevel converters (MMC) to implement UPFC that lead to cost-effective and reliable systems Draws from the most up-to-date research and practical applications Teaches electromechanical/electromagnetic transient simulation techniques and real-time closed-loop simulation test techniques of the MMC based UPFC

Download or read book Unified Power Flow Controllers Without Energy Storage Designing Power Controllers for the Matrix Converter Solution written by Joaquim Monteiro and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Unified Power Flow Controllers Without Energy Storage: Designing Power Controllers for the Matrix Converter Solution.

Download or read book Unified Power Flow Controller Modeling Stability Analysis Control Strategy and Control System Design written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Optimal Control Schemes for Power System with Unified Power Flow Controller UPFC written by Dr Hidaia Mahmood Alassouli and published by . This book was released on 2021-04-06 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: On the end-user side, power electronics conversion and switching technology has been fast growing area. Complementing the Custom Power technology is the whole area of power conditioning technology used by customers, under the term Power Quality. Uninterruptible power supplies (UPS) and voltage regulators represent the major growth area in power electronics. In end use, the converter sizes range from a few watts to ten of megawatts. The term active filter is a general one and is applied to a group of power electronic circuits incorporating power switching devices and passive energy storage circuit elements such as inductors and capacitors. The functions of these circuits vary depending on the applications. They are generally used for controlling current harmonics in supply networks at the low and medium voltage distribution level or for reactive power and/or voltage control at high voltage distribution level. These functions may be combined in a single circuit or in separate active filters. Most of the control schemes introduced in the existing papers were designed either for eliminating current harmonics or eliminating voltage flickers or for load flow control. So, this work is devoted to find a proper optimal control schemes for a system with series or shunt or series and shunt converters that can provide all functions together. Various optimal control schemes will be designed for systems with series, shunt and series-shunt converters with the objective to control the load flow through a lines and to eliminate current harmonics and voltage flickers with different strategies for tracking. -Part 1: Gives the description of optimal control design. -Part 2: Case studies to design different optimal control schemes for system with UPFC unit to control the power flow, eliminate voltage flicker and eliminate current harmonics. The case studies were repeated for system with only series or shunt converters.

Download or read book Energy Storage in the Emerging Era of Smart Grids written by Rosario Carbone and published by IntechOpen. This book was released on 2011-09-22 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reliable, high-efficient and cost-effective energy storage systems can undoubtedly play a crucial role for a large-scale integration on power systems of the emerging "distributed generation" (DG) and for enabling the starting and the consolidation of the new era of so called smart-grids. A non exhaustive list of benefits of the energy storage properly located on modern power systems with DG could be as follows: it can increase voltage control, frequency control and stability of power systems, it can reduce outages, it can allow the reduction of spinning reserves to meet peak power demands, it can reduce congestion on the transmission and distributions grids, it can release the stored energy when energy is most needed and expensive, it can improve power quality or service reliability for customers with high value processes or critical operations and so on. The main goal of the book is to give a date overview on: (I) basic and well proven energy storage systems, (II) recent advances on technologies for improving the effectiveness of energy storage devices, (III) practical applications of energy storage, in the emerging era of smart grids.

Download or read book Energy Storage in the Emerging Era of Smart Grids written by Rosario Carbone and published by BoD – Books on Demand. This book was released on 2011-09-22 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reliable, high-efficient and cost-effective energy storage systems can undoubtedly play a crucial role for a large-scale integration on power systems of the emerging "distributed generation" (DG) and for enabling the starting and the consolidation of the new era of so called smart-grids. A non exhaustive list of benefits of the energy storage properly located on modern power systems with DG could be as follows: it can increase voltage control, frequency control and stability of power systems, it can reduce outages, it can allow the reduction of spinning reserves to meet peak power demands, it can reduce congestion on the transmission and distributions grids, it can release the stored energy when energy is most needed and expensive, it can improve power quality or service reliability for customers with high value processes or critical operations and so on. The main goal of the book is to give a date overview on: (I) basic and well proven energy storage systems, (II) recent advances on technologies for improving the effectiveness of energy storage devices, (III) practical applications of energy storage, in the emerging era of smart grids.

Download or read book Modelling and Simulation of Unified Power Flow Controller written by Mehdi Toufan and published by . This book was released on 1997 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Power Grid Flow Control Studies and High Speed Simulation written by William Michael Siever and published by . This book was released on 2007 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Flexible AC transmission System (FACTS) devices, which use high-speed, high-power semiconductor technology to better control power grids, are expected to be vital components to regulate an increasingly overburdened and under regulated transmission system. The work presented here demonstrates that the most general of these devices, the Unified Power Flow Controller (UPFC), may be able to reduce the kinds of power flows that lead to cascading failures. A comprehensive plan to use the UPFC as a theoretical super set of FACTS devices is proposed, which can be used to significantly harden power grids against both intentional and natural failures. Finally, a set of techniques for high speed simulation is developed which can be used in conjunction with the proposed hardening plan to allow it to be scaled to actual systems"--Abstract, leaf iv.

Download or read book Applications of Unified Power Flow Controllers in Power System Stability Enhancement written by Surachai Limyingcharoen and published by . This book was released on 1999 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Facts Study and Simulation written by Antoine Pochon and published by . This book was released on 2000 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laboratory Implementation of Unified Power Flow Controller Hardware in loop Simulation written by Keyou Wang and published by . This book was released on 2008 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: "One of the most promising network controllers for the bulk power system is the family of power electronics-based controllers, known as "flexible AC transmission system" (FACTS) devices. FACTS devices work by modifying power flow in individual lines of the power grid, maintaining voltage stability, and damping oscillations. The rapid development of the power electronics industry has made FACTS devices increasingly attractive for utility deployment due to their flexibility and ability to effectively control power system dynamics. The primary function of the FACTS is to control the transmission line power flow; the secondary functions of the FACTS can be voltage control, transient stability improvement and oscillation damping. Although considerable FACTS research work has concentrated on developing control strategies via simulation, there is a general lack of experimental verification of many of the proposed controls. In order to fully understand how to effectively incorporate FACTS devices into existing power systems, a hardware prototype for verification is necessary in addition to software simulation. Experimental studies provide valuable data to evaluate models, test proposed control algorithms, and analyze dynamic performance. Furthermore, experimental studies provide the basis with which to predict the device performance in the actual power system operation. Traditional software-based simulation has the disadvantage of being unable to exactly replicate real operational conditions. On the other hand, a small laboratory power system is not capable of fully capturing the depth and breadth of large-scale power system dynamics. One way to bridge the gap between simulation and real conditions is to combine real-time simulation (RTS) and hardware-in-the-loop (HIL). The contribution of this work is the development of the hardware-software co-design process required to successfully implement the FIL"--Abstract, leaves iii-iv.

Download or read book Modeling of a Unified Power Flow Controller written by Peiwei Cao and published by . This book was released on 1999 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modeling and Control of the Unified Power Flow Controller UPFC written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Unified Power Flow Controller UPFC Development of the Mathematical Framework and Design of a Transient Model written by Manish Thakur and published by . This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Optimal Control Schemes for Power System with Unified Power Flow Controller UPFC written by Hedaya Mahmood Alasooly and published by . This book was released on 2021-03-18 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: What is most interesting for transmission planners is that FACTS opens up new opportunities for controlling power and enhancing the usable capacity of the lines. The possibility that current through a line can be controlled at reasonable cost enables a large potential of increasing the capacity of the existing lines with larger conductors, and use one of the FACTS controllers to enable corresponding power to flow through lines under normal and contingency conditions. These opportunities arise through the ability of FACTS controllers to control the interrelated parameters that govern the operation of transmission line including series impedance, shunt impedance, current, voltage, phase angle, and the damping of oscillations at various frequencies below the rated frequency. In distribution area, an exciting opportunity called Custom Power. The custom power concept incorporates power electronics controllers and switching equipment, one or more of which can be used to provide a value-added service to the customers. In general, these custom service applications represent power electronics in the range of few tens of kilowatts to few ten of megawatts of conversion or switching equipment between the utility supply and customer. On the end-user side, power electronics conversion and switching technology has been fast growing area. Complementing the Custom Power technology is the whole area of power conditioning technology used by customers, under the term Power Quality. Uninterruptible power supplies (UPS) and voltage regulators represent the major growth area in power electronics. In end use, the converter sizes range from a few watts to ten of megawatts. The term active filter is a general one and is applied to a group of power electronic circuits incorporating power switching devices and passive energy storage circuit elements such as inductors and capacitors. The functions of these circuits vary depending on the applications. They are generally used for controlling current harmonics in supply networks at the low and medium voltage distribution level or for reactive power and/or voltage control at high voltage distribution level. These functions may be combined in a single circuit or in separate active filters. Most of the control schemes introduced in the existing papers were designed either for eliminating current harmonics or eliminating voltage flickers or for load flow control. So, this work is devoted to find a proper optimal control schemes for a system with series or shunt or series and shunt converters that can provide all functions together. Various optimal control schemes will be designed for systems with series, shunt and series-shunt converters with the objective to control the load flow through a lines and to eliminate current harmonics and voltage flickers with different strategies for tracking. - Part 1: Gives the description of optimal control design. - Part 2: Case studies to design different optimal control schemes for system with UPFC unit to control the power flow, eliminate voltage flicker and eliminate current harmonics. The case studies were repeated for system with only series or shunt converters.

Download or read book Modeling and Control of the Hybrid Power Flow Controller for Steady state and Dynamic Studies and Applications written by Behnam Tamimi and published by . This book was released on 2017 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flexible ac transmission system (FACTS) controllers offer new opportunities to better control power systems, and can address some of the critical challenges faced by the grid, especially in the context of smart grids. Furthermore, the smartening of distribution systems with distributed generation, storage devices, and intelligent loads have created challenges for the operation of distribution feeders, which can be addressed adequately with power-electronics based controllers and FACTS controllers for distribution systems. However, the capital intensive nature of these controllers is a major obstacle for a wide application of this technology in power systems. A cost effective FACTS controller has been introduced in the literature, which yields operating characteristics similar to those of the versatile Unified Power Flow Controller (UPFC). This device consists of converters as well as passive components, and is referred to as the Hybrid Power Flow Controller (HPFC). The study of the HPFC and its performance in electric power systems requires adequate and relevant models representing the device behavior according to the intended studies, such as steady state or time-domain dynamic analyses; moreover, the benefits of an HPFC are determined by its limits and operating constraints. Therefore, static and dynamic models of the HPFC for transmission and distribution system applications are proposed and studied in this work. First, steady-state models of the HPFC for power flow and optimal power flow (OPF) studies are proposed in this work, considering its multiple control modes and operating constraints. Thus, a strategy for control limit handling in power flow calculations is proposed, while considering a discrete passive shunt capacitor bank in the device. Moreover, an OPF model of the device is proposed and explained in detail, representing all the device control and physical limits as constraints in the mathematical formulation, so that the HPFC can be optimally dispatched as a part of the transmission system control assets; this model is used to determine the optimal ratings of the device based on a cost--benefit analysis. The proposed power flow and OPF models are tested and validated based on several loadability studies on a two-area benchmark test system. The HPFC power flow model is also tested and applied to a detailed model of Ontario grid and its neighboring networks with more than 6000 buses. The analyses demonstrate the application of the models for planning and operation studies, evaluating the performance and the effectiveness of the device based on realistic studies and scenarios. Second, the merits and the added value of the HPFC application to distribution systems are discussed here through detailed modeling and time-domain simulations, examining its impact on a distribution network under different conditions. Thus, a detailed dynamic representation of the HPFC is developed and implemented in PSCAD/EMTDC, describing and proposing control strategies to properly operate this controller in distribution system applications, such as an effective and simple procedure for starting-up the device. The developed model is used to demonstrate the effectiveness of the controller for solving problems in distribution systems, such as voltage sags associated with feeder faults and power flow fluctuations due to intermittent renewable generation using a benchmark network as an illustrative example.