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Electrical Design of a 400 kV Composite Tower
This book presents an innovative concept for designing a 400 kV double circuit composite tower. The major challenges encountered by the authors in the electrical design process of the composite tower are addressed. They concern material selection for the full composite cross-arm core, electrical insulation of the cross-arm, electrical dimensioning of the full composite tower, lightning shielding performance and failure of the full composite tower. The electric field performance of the tower’s insulation has been investigated theoretically by using finite element method and experimentally by testing different fiber reinforced polymers as candidates. The book reports in detail those finite element simulations and tests, together with the authors’ recommendations on the most suitable materials and manufacturing process as well as conductor clamp designs for the cross-arm. Another important issue of the full composite tower, which concerns the environmental aspects of the full composite tower, has also been evaluated. This book offers a timely reference guide on a highly innovative topic, addressing researchers working on power transmission system both in industry and academia.
Electromagnetic Transients in Power Cables
From the more basic concepts to the most advanced ones where long and laborious simulation models are required, Electromagnetic Transients in Power Cables provides a thorough insight into the study of electromagnetic transients and underground power cables. Explanations and demonstrations of different electromagnetic transient phenomena are provided, from simple lumped-parameter circuits to complex cable-based high voltage networks, as well as instructions on how to model the cables. Supported throughout by illustrations, circuit diagrams and simulation results, each chapter contains exercises, solutions and examples in order to develop a practical understanding of the topics. Harmonic analysis of cable-based networks and instructions on how to accurately model a cable-based network are also covered, including several “tricks” and workarounds to help less experienced engineers perform simulations and analyses more efficiently. Electromagnetic Transients in Power Cables is an invaluable resource for students and engineers new to the field, but also as a point of reference for more experienced industry professionals.
Online Location of Faults on AC Cables in Underground Transmission Systems
This book reports on various techniques for fault location on cross bonded cables, identifies the best method and describes the construction of a full fault locator system. The developed system is able of pinpointing the fault location on long cross-bonded cable systems and will be installed in Danish substations for monitoring the coming cable-based transmission grid. The work was conducted as part of a collaborative project between the department of energy technology at Aalborg University and the Danish transmission system operator for electricity and natural gas, Energinet.dk.
Harmonics in Offshore Wind Power Plants
This book reports on cutting-edge findings regarding harmonic stability assessment for offshore wind power plants (OWPPs). It presents a timely investigation of the harmonic stability interaction between OWPPs on the one hand, and associated control systems in the wind turbines and other power electronic devices in the transmission system on the other. The book particularly focuses on voltage-sourced converter high-voltage direct current (VSC-HVDC) and static compensator (STATCOM) systems. From a practical perspective, the book reports on appropriate models for power electronic devices. It describes how the frequency domain evaluation approach can be assessed by comparing results obtained with the Nyquist stability criterion against the more detailed electromagnetic transient based model realized in the PSCAD/EMTDC simulation program. The book also provides a concise yet complete overview of large OWPPs that incorporate power electronic devices on a broad scale, and highlights selected challenges and opportunities in the context of real-world applications.
Intelligent Control for Modern Transportation Systems
The book comprehensively discusses concepts of artificial intelligence in green transportation systems. It further covers intelligent techniques for precise modeling of complex transportation infrastructure, forecasting and predicting traffic congestion, and intelligent control techniques for maximizing performance and safety. It further provides MATLAB® programs for artificial intelligence techniques. It discusses artificial intelligence-based approaches and technologies in controlling and operating solar photovoltaic systems to generate power for electric vehicles. Highlights how different technological advancements have revolutionized the transportation system. Presents core concepts and...
Planning and Control of Expandable Multi-Terminal VSC-HVDC Transmission Systems
This book discusses novel methods for planning and coordinating converters when an existing point-to-point (PtP) HVDC link is expanded into a multi-terminal HVDC (MTDC) system. It demonstrates that expanding an existing PtP HVDC link is the best way to build an MTDC system, and is especially a better option than the build-from-scratch approach in cases where several voltage-sourced converter (VSC) HVDC links are already in operation. The book reports in detail on the approaches used to estimate the new steady-state operation limits of the expanded system and examines the factors influencing them, revealing new operation limits in the process. Further, the book explains how to coordinate the converters to stay within the limits after there has been a disturbance in the system. In closing, it describes the current DC grid control concept, including how to implement it in an MTDC system, and introduces a new DC grid control layer, the primary control interface (IFC).
Voltage Control in the Future Power Transmission Systems
This book reports on the formulation of a multi-stage optimization framework for the Danish power system, taking into account the real operational cost, the voltage constraints and the uncertainty associated to the forecasting errors of the wind power. It describes in detail the implementation of this framework into a simulation platform and its validation in real-world applications. The book especially focuses on automatic voltage control systems and on methods to handle uncertainty in them. All in all, it provides readers with a comprehensive overview of power system optimization and future trends in power system operation.
Ensuring Supply Reliability and Grid Stability in a 100% Renewable Electricity Sector in the Faroe Islands
This book offers a comprehensive study concerning the reliability of renewable electricity production in the Faroe Islands. The first part reports on a RoadMap with investments in generation, storage and transmission capacity. Multiple scenarios, considering different technologies, are analysed. Practical constraints like the local resource potential, power plant locations and sizes are discussed, as well as the potential of tidal power. The second part of the book describes dynamic simulations studies carried out to investigate grid stability of the power system on the isolated island of Suðuroy. The available information about governor and automatic voltage regulators of the synchronous generators was very limited, therefore different approaches were combined to parameterise and validate the dynamic models. All in all, this book offers extensive information concerning the transition of the Faroese power system into a 100% renewable system. It is practice-oriented, and describes methods that can be applied to other power systems as well.
Kriseklar
Er du forberedt, hvis du pludselig mister adgang til strøm, vand eller internet? I denne bog giver en lang række eksperter - med Rasmus Dahlberg fra Center for Samfundssikkerhed i spidsen - deres bud på, hvordan du bliver klar til at håndtere hybridangreb, der på forskellige måder kan slå vores samfund ud af kurs. Det kan være, at du allerede ved en masse om prepping. Det kan også være, at du først nu er begyndt at gøre dig tanker om kriseforberedelse. Uanset din tilgang og erfaring vil bogen kunne bidrage til dit eget hjemmeberedskab. Bogen fungerer også som dit private opslagsværk, da du kan notere vigtige telefonnumre, adresser og andre informationer, der kan være altafgørende i en krisesituation.
