Advance Control of AC/DC Power Networks

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Nowadays, more than ever, the power engineering domain is facing huge challenges. It is showing an increasing interest in intermittent renewable energies which are imposing major technical limitations. The use of these resources must be accompanied by secure, indigenous, sustainable, clean and competitive operation. A realistic solution is wind power. Many countries are now starting to install wind turbines offshore. In Europe, the offshore wind potential is able to cover seven times the whole demand. High-voltage alternating current (HVAC) provides the simplest and most economic connection method for short distances. Because the distance of the offshore farms exceeds 100–150 km, the transmission with high-voltage direct current (HVDC) is economically inevitable. Thus, HVDC systems offer interesting prospects if the power grid is well controlled.

For power transmission, the DC grid would overlay the existing AC grid, like a national motorway system connects to smaller local road systems. In power distribution, DC grids will emerge from more constrained grid codes as they will be imposed by distribution operators for PV integration. One of the main challenges for DC deployment is the handling of multi-terminal DC (MTDC) grids. At the heart of the thinking behind the MTDC grids is, precisely, the notion of “system of systems”. Indeed, a key component of systems of systems control and operations is the notion of time scales. For example, the primary control in AC grids is a global but distributed control in which the notion of “Think Globally and Act Locally” (TGAL) is applied. This time scales control philosophy will enable the “plug-and-play” property which is mandatory when dealing with networked systems. For example, in a flock of birds or school of fish, each individual keeps a certain distance and
follows the congener in front. The result is that each individual acts like the whole group, while the whole group acts like an individual (droop control: global but distributed control). The individual can leave or join the group without altering its global behavior (plug-and-play). In addition to time
scales, space scale considerations need to be taken into account with new modeling, control and observation tools and techniques.

Content:-
FOREWORD
PREFACE
LIST OF FIGURES
LIST OF TABLES
INTRODUCTION
CHAPTER 1. MODELING CONTROL OF VSCS
CHAPTER 2. TIME SCALE TOOLS: A CONTROL SOLUTION FOR MTDC COMPLEX SYSTEMS WITH PLUG-AND-PLAY REQUIREMENTS
CHAPTER 3. FROM SMALL SIGNAL TO EXACT LINEARIZATION OF SWING EQUATIONS
CHAPTER 4. SPACE SCALE PROPERTIES FOR AC/DC POWER NETWORK CONTROL AND OPERATIONS: NEW AGGREGATION METHODS IN POWER SYSTEMS
CONCLUSION
APPENDICES

APPENDIX 1
APPENDIX 2
APPENDIX 3
BIBLIOGRAPHY
INDEX

Author Details
"Abdelkrim Benchaib"




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