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This book introduces novel results on mathematical modelling, parameter identification, and automatic control for a wide range of applications of mechanical, electric, and mechatronic systems, where undesirable oscillations or vibrations are manifested. The six chapters of the book written by experts from international scientific community cover a wide range of interesting research topics related to: algebraic identification of rotordynamic parameters in rotor-bearing system using finite element models; model predictive control for active automotive suspension systems by means of hydraulic actuators; model-free data-driven-based control for a Voltage Source Converter-based Static Synchronous Compensator to improve the dynamic power grid performance under transient scenarios; an exact elasto-dynamics theory for bending vibrations for a class of flexible structures; motion profile tracking control and vibrating disturbance suppression for quadrotor aerial vehicles using artificial neural networks and particle swarm optimization; and multiple adaptive controllers based on B-Spline artificial neural networks for regulation and attenuation of low frequency oscillations for large-scale power systems. The book is addressed for both academic and industrial researchers and practitioners, as well as for postgraduate and undergraduate engineering students and other experts in a wide variety of disciplines seeking to know more about the advances and trends in mathematical modelling, control and identification of engineering systems in which undesirable oscillations or vibrations could be presented during their operation.

Technology: general issues --- History of engineering & technology --- B-spline neural networks --- adaptive power system control --- coordinated multiple controllers --- StatCom --- exact plate theory --- thick plate --- bending vibration --- partial differential operator theory --- gauge condition --- data-driven control --- reactive power compensation --- STATCOM --- voltage control --- voltage source converter --- quadrotor UAV --- artificial neural networks --- robust control --- Taylor series --- B-splines --- particle swarm optimization --- active suspension --- model predictive control --- linear parameter varying --- ellipsoidal set --- attraction sets --- quadratic stability --- algebraic identification --- rotor-bearing system --- finite element model --- rotordynamic coefficients --- B-spline neural networks --- adaptive power system control --- coordinated multiple controllers --- StatCom --- exact plate theory --- thick plate --- bending vibration --- partial differential operator theory --- gauge condition --- data-driven control --- reactive power compensation --- STATCOM --- voltage control --- voltage source converter --- quadrotor UAV --- artificial neural networks --- robust control --- Taylor series --- B-splines --- particle swarm optimization --- active suspension --- model predictive control --- linear parameter varying --- ellipsoidal set --- attraction sets --- quadratic stability --- algebraic identification --- rotor-bearing system --- finite element model --- rotordynamic coefficients

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This book comprises ten articles covering different aspects of power quality issues in microgrids and distributed generation (DG) systems, including 1) Detection and estimation of power quality; 2) Modeling; 3) Harmonic control for DG systems and microgrids; 4) Stability improvements for microgrids. Different power quality phenomena and solution were studied in the included papers, such as harmonics, resonance, frequency deviation, voltage sag, and fluctuation. From a network point of view, some papers studied the harmonic and stability issues in standalone microgrids which are more likely to cause power quality problems. Other papers discussed the power quality problems in microgrids which are weakly interconnected with the main distribution grid. In view of the published papers, there is a trend that increasingly advanced modeling, analysis, and control schemes were applied in the studies. Moreover, the latest works focus not only on single-unit problems but also multiple units or network issues. Although some of the hot topics are not included, this book covers multiple aspects of the current power quality research frontier, and represents a particularly useful reference book for frontier researchers in this field.

power quality improvement --- differential feedforward --- weak grid --- data testing --- distributed generations --- voltage-source converter --- dynamic frequency support --- coordinated control --- grid-connection/island switching process --- virtual damping --- PV generation --- virtual inertia --- autonomous microgrid --- optimal virtual resistor --- multi-inverter system --- standalone microgrid --- unscented Kalman filter --- HVDC --- voltage fluctuation --- solar photovoltaic system --- nonlinear dynamic system --- state estimation --- voltage stability --- diesel generator --- voltage control --- multi-time scale --- sliding mode control --- power system simulation --- stability analysis --- grid impedance --- modeling method --- shunt inverter --- voltage compensation --- 2nd-order lowpass filter --- virtual synchronous generator --- microgrid --- output impedance --- hybrid energy storage --- grid-connected inverter --- parameter identification --- wind farm --- frequency stability --- harmonic suppression --- current source mode (CSM) --- voltage source mode (VSM) --- stand-alone microgrid --- frequency control --- vector control --- power quality control --- grid-tied inverter --- submarine cables --- line commutated converter --- reference current compensation --- power quality --- series inverter --- impedance enhancement

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Electric power systems are headed for a true changing of the guard, due to the urgent need for achieving sustainable energy delivery. Fortunately, the development of new technologies is driving the transition of power systems toward a carbon-free paradigm while maintaining the current standards of quality, efficiency, and resilience. The introduction of HVDC and FACTS in the 20th century, taking advantage of dramatic improvements in power electronics and control, gave rise to unprecedented levels of flexibility and speed of response in comparison with traditional electromechanical devices. This flexibility is nowadays required more than ever in order to solve a puzzle with pieces that do not always fit perfectly. This Special Issue aims to address the role that FACTS and HVDC systems can play in helping electric power systems face the challenges of the near future.

History of engineering & technology --- VSC-HVDC --- unbalanced grid conditions --- double frequency ripples --- power compensation --- passive-based control --- disturbance observer --- dynamic capacitor --- inductive unbalanced load --- reactive power compensation --- imbalance suppression --- compensation ability --- HVDC transmission --- hybrid multi-terminal HVDC --- LCC --- MTDC --- power system analysis --- VSC --- breakers --- hybrid DC circuit breaker --- fault current limiters --- non-superconducting fault current limiters --- current-limiting inductors --- voltage source converter --- FACTS --- grid services --- CHIL --- PHIL --- lab testing --- field testing --- standards --- STATCOM --- replica --- review --- korean power system --- subsynchronous resonance (SSR) --- synchronous voltage reversal (SVR) --- thyristor controlled series capacitor (TCSC) --- test signal method --- virtual synchronous machine --- synchronous power controller --- power quality --- harmonics --- hybrid power quality compensation system --- the thyristor-controlled L and C-type filter (TCL-CTF) --- ancillary services --- HVDC systems --- loss management --- frequency control --- voltage and reactive power control --- black start --- congestion management --- distribution networks --- hybrid AC/DC networks --- power systems --- high voltage direct current (HVDC) transmission --- HVDC systems based on voltage source converters (VSC-HVDC) --- multi-terminal --- transient stability --- control strategies --- communication latency --- power oscillations --- UPFC --- non-linear control --- neural network --- model reference control --- High voltage direct current (HVDC) --- continuous commutation failures --- DC blocking --- emergency power support --- stability --- VSC-HVDC --- unbalanced grid conditions --- double frequency ripples --- power compensation --- passive-based control --- disturbance observer --- dynamic capacitor --- inductive unbalanced load --- reactive power compensation --- imbalance suppression --- compensation ability --- HVDC transmission --- hybrid multi-terminal HVDC --- LCC --- MTDC --- power system analysis --- VSC --- breakers --- hybrid DC circuit breaker --- fault current limiters --- non-superconducting fault current limiters --- current-limiting inductors --- voltage source converter --- FACTS --- grid services --- CHIL --- PHIL --- lab testing --- field testing --- standards --- STATCOM --- replica --- review --- korean power system --- subsynchronous resonance (SSR) --- synchronous voltage reversal (SVR) --- thyristor controlled series capacitor (TCSC) --- test signal method --- virtual synchronous machine --- synchronous power controller --- power quality --- harmonics --- hybrid power quality compensation system --- the thyristor-controlled L and C-type filter (TCL-CTF) --- ancillary services --- HVDC systems --- loss management --- frequency control --- voltage and reactive power control --- black start --- congestion management --- distribution networks --- hybrid AC/DC networks --- power systems --- high voltage direct current (HVDC) transmission --- HVDC systems based on voltage source converters (VSC-HVDC) --- multi-terminal --- transient stability --- control strategies --- communication latency --- power oscillations --- UPFC --- non-linear control --- neural network --- model reference control --- High voltage direct current (HVDC) --- continuous commutation failures --- DC blocking --- emergency power support --- stability

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In the current scenario in which climate change dominates our lives and in which we all need to combat and drastically reduce the emission of greenhouse gases, renewable energies play key roles as present and future energy sources. Renewable energies vary across a wide range, and therefore, there are related studies for each type of energy. This Special Issue is composed of studies integrating the latest research innovations and knowledge focused on all types of renewable energy: onshore and offshore wind, photovoltaic, solar, biomass, geothermal, waves, tides, hydro, etc. Authors were invited submit review and research papers focused on energy resource estimation, all types of TRL converters, civil infrastructure, electrical connection, environmental studies, licensing and development of facilities, construction, operation and maintenance, mechanical and structural analysis, new materials for these facilities, etc. Analyses of a combination of several renewable energies as well as storage systems to progress the development of these sustainable energies were welcomed.

Technology: general issues --- RE prospects and challenges --- RE regulations and policy --- RE in Bangladesh --- geothermal energy --- induced seismicity --- fault --- Basel --- poroelasticity --- HEM --- PV sizing --- Load scheduling --- Dijkstra Algorithm --- BPSO --- GA --- optimization --- wind farm --- pumped storage --- isolated systems --- power plant efficiency --- compact pigeon-inspired optimization --- maximum short-term generation --- swarm intelligence --- hydroelectric power station --- strategic planning --- site selection process --- offshore wind farms --- geographic information systems --- portfolio analysis --- Greece --- renewable energy --- photovoltaic generation --- battery storage --- reliability evaluation --- Monte Carlo Simulation --- photovoltaics (PV) --- biomass --- off-grid electrification --- feasibility analysis --- cost analysis --- simple payback period --- CO2 emissions --- residential energy-related CO2 emissions --- less developed regions --- urban and rural regions --- LMDI --- Tapio decoupling --- Jiangxi province --- Hybrid energy system --- wind power --- photovoltaic --- hosting capacity --- distribution system --- integrated system --- floating buoy --- offshore structure --- wave energy converter --- non-negative spring stiffness --- renewable–growth hypothesis --- renewable electricity --- economic growth --- renewable manufacturing --- energy–growth nexus --- inverters --- converters --- distributed generators --- utility grid --- hierarchical control --- PHEV --- NEDC --- WLTP --- energy consumption --- NEV credit regulation --- subsidy policy --- frequency control --- power system stability --- variable renewable energy sources --- wind power plants --- photovoltaic power plants --- wave energy converters --- heaving point absorber --- design and performance --- spatial and temporal variation --- emergy --- emergetic ternary diagrams --- sustainability --- environmental loading --- energy systems assessment --- solar updraft tower --- artificial neural network --- principal component analysis --- wave overtopping rate --- photovoltaic spatial planning --- photovoltaic carrying capacity --- influence factors --- optimization strategies --- carrying capacity distribution --- planning adjustment --- renewable energy resources --- grid integrated solar PV systems --- sustainable power generation --- maximum power point tracking --- grid reliability and voltage source converter

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The use of renewable energy sources (RESs) is a need of global society. This editorial, and its associated Special Issue “Grid-Connected Renewable Energy Sources”, offers a compilation of some of the recent advances in the analysis of current power systems that are composed after the high penetration of distributed generation (DG) with different RESs. The focus is on both new control configurations and on novel methodologies for the optimal placement and sizing of DG. The eleven accepted papers certainly provide a good contribution to control deployments and methodologies for the allocation and sizing of DG.

Research & information: general --- Technology: general issues --- solar energy --- wind energy --- energy storage --- renewable energy integration --- Europe --- advanced metering infrastructure --- data acquisition --- IEC standards --- low-cost --- open source --- power measurement --- smart meter --- uncertainty evaluation --- frequency stabilization --- coordinated control --- wind turbine generator --- high-fidelity battery model --- releasable and absorbable energy --- photovoltaic emulator --- photovoltaic panel --- single diode model --- MPPT --- FSWT-SCIG --- battery storage system --- power system stability --- synchronous generator --- hybrid system --- voltage source converter --- passivity-based control --- proportional-integral control --- voltage regulation --- bi-directional converter --- LC impedance source converter --- DC–DC power converter --- bi-directional power flow --- alternating current networks --- direct current networks --- optimal power flow --- non-linear optimization --- control of power electronic converters --- distributed generation --- mixed-integer nonlinear programming --- second-cone programming --- discrete-sine cosine algorithm --- metaheuristic optimization --- DG placement --- evolutionary algorithms --- energy management --- fuzzy controller --- power systems analysis --- interconnected power systems --- latencies --- time-delay effects --- wide area monitoring systems --- renewable energy conversion --- power conditioning devices --- renewable energy policies --- power quality --- computations methods --- control strategies --- electric vehicle charging --- energy management systems --- ancillary services --- monitoring --- prognostic and diagnostic