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Solid oxide fuel cells offer great prospects for the sustainable, clean and safe conversion of various fuels into electrical energy. In this thesis, the performance-determining loss processes for the cell operation on reformate fuels are elucidated via electrochemical impedance spectroscopy. Model-based analyses reveal the electrochemical fuel oxidation mechanism, the coupling of fuel gas transport and reforming chemistry and the impact of fuel impurities on the degradation of each loss process.

SOFC --- Electrochemistry --- Reforming Chemistry --- Impedance Spectroscopy --- Modeling

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This book covers new advances in the field of impedance spectroscopy including fundamentals, methods and applications. It releases selected extended and peer reviewed scientific contributions from the International Workshop on Impedance Spectroscopy (IWIS 2017) focussing on detailed information about recent scientific research results in electrochemistry and battery research, bioimpedance measurement, sensors, system design, signal processing.

Engineering --- International Workshop on Impedance Spectroscopy --- Electrochemistry and Battery Research --- Bioimpedance Measurement --- Sensors

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ca. 200 words; this text will present the book in all promotional forms (e.g. flyers). Please describe the book in straightforward and consumer-friendly terms.[Selective and quantitative detection of different kinds of biocomponents plays an important role in biomedical applications, clinical diagnostics, environmental monitoring, toxicology, regenerative medicine and drug delivery. Therefore, multidisciplinary area of magnetic biosensing have been extensively developed in recent years, aiming to create compact analytical devices for non-expensive and low time consuming analysis provided at the point of care by non-skilled personnel. Biological samples exhibit very low magnetic background, and thus highly sensitive measurements of magnetic labels or magnetic nanoparticles enriched units can be performed without further processing. A magnetic biosensor is a compact analytical device in which magnetic transducer converts a magnetic field variation into a change of frequency, current, voltage, etc. Different types of magnetic effects are capable of creating magnetic biosensors with extra high sensitivity. This book describes interesting examples of magnetic materials based biosensors, including the synthesis of model materials for biosensor development, new engineering solutions and theoretical contributions on the magnetic biosensor sensitivity. Book contains 13 research works representing international multidisciplinary teams from Austria, China, Germany, Greece, Iran, Russia, Serbia, Spain, Taiwan and United States of America. It can be useful for PHD students and researches working in the field of magnetic nanomaterials and biomedical applications.

Magnetic biosensors --- Magnetic nanoparticles --- Ferrogels --- Magnetic label detection --- Label free magnetic detection --- Magnetic relaxation --- Electrochemical impedance spectroscopy

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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.

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

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The modern electric power system has evolved into a huge nonlinear complex system due to the interconnection of thousands of generation and transmission systems. The unparalleled growth of renewable energy resources (RESs) has caused significant concern regarding grid stability and power quality, and it is essential to find ways to control such a massive system for effective operation. The controllability of HVDC and FACTS devices allows for improvement of the dynamic behavior of grids and their flexibility. Research is being carried out at both the system and component levels of modelling, control, and stability. This Special Issue aims to present novel HVDC topologies and operation strategies to prevent abnormal grid conditions.

BTB-HVDC --- power control --- angle stability --- special protection system --- DC distribution --- 3-phase AC/DC PWM converter --- SOGI-FLL --- phase detection --- half bridge (HB) --- full bridge (FB) --- modular multilevel converter (MMC) --- hybrid HVDC breaker (HCB) --- grid-interconnection --- active power control strategies --- transient stability --- GVIF index --- angle spread --- VSC-HVDC --- grid service of HVDC --- frequency droop control --- multi-infeed HVDC system --- LCC HVDC --- VSC HVDC --- loss minimization --- commutation failure probability --- line commutated converter --- high voltage direct current (HVDC) --- synchronous condenser (SC) --- quantitative evaluation --- DC distribution system --- AC/DC converter --- protection --- grounding system --- insulation monitoring device (IMD) --- modular multilevel converter (MMC) --- reclosing process --- fault current limiter (FCL) --- short-circuit current calculation --- reclosing current limiting resistance (RCLR) --- back-to-back HVDC --- embedded HVDC --- HVDC operation point --- Powell’s direct set method --- system loss minimization --- VSC–HVDC --- DC-side oscillation --- virtual impedance --- impedance-based Nyquist stability criterion --- n/a