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This work presents the design and investigation of a novel UV-lamp-system, which is based upon UV-induction lamps and a MHz-inverter equipped with normally-on junction field effect transistors (JFET). A system efficiency of some more than 27 % is verified with the prototype UV-induction lamp system, which positions between the two previous UV-systems and open up new fields of application.

MHz-Wechselrichter --- Siliziumkarbid --- UV-disinfection --- resonant inverter --- UV-Induktionslampe --- UV-induction lamp --- Resonanzwechselrichter --- silicon carbide --- UV-DesinfektionMHz inverter

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621.317 --- Meettechniek (elektrische) --- Multimeters --- analoge regelaar --- elektrisch toestel --- elektrotechniek --- multimeter --- omzetter --- vermogen --- weerstandmeter --- (zie ook: inverter)

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Power converters and electric machines represent essential components in all fields of electrical engineering. In fact, we are heading towards a future where energy will be more and more electrical: electrical vehicles, electrical motors, renewables, storage systems are now widespread. The ongoing energy transition poses new challenges for interfacing and integrating different power systems. The constraints of space, weight, reliability, performance, and autonomy for the electric system have increased the attention of scientific research in order to find more and more appropriate technological solutions. In this context, power converters and electric machines assume a key role in enabling higher performance of electrical power conversion. Consequently, the design and control of power converters and electric machines shall be developed accordingly to the requirements of the specific application, thus leading to more specialized solutions, with the aim of enhancing the reliability, fault tolerance, and flexibility of the next generation power systems.

Technology: general issues --- Energy industries & utilities --- power systems for renewable energy --- fault-tolerant photovoltaic inverter --- islanding detection --- energy storage system --- DC/AC converter --- voltage-source --- multilevel inverter --- PV systems --- neutral point clamped inverter --- flying capacitor inverter --- cascaded inverter --- renewable energy systems --- ultra-fast chargers --- input-series input-parallel output-series output-parallel multimodule converter --- cross feedback output current sharing --- reflex charging --- digital twin --- doubly-fed induction generator, electrical machines --- finite elements method --- monitoring --- real-time --- wound rotor induction machine --- subsynchronous control interaction --- super-twisting sliding mode --- variable-gain --- doubly fed induction generator --- photovoltaic system --- grid --- sliding mode control --- synergetic control --- fractional-order control --- converter–machine association --- direct drive machine --- Permanent Magnet Vernier Machine --- synchronous generator --- wind energy system for domestic applications --- renewable energy --- adaptive --- fuzzy --- feedback linearization --- photovoltaic (PV) grid inverter --- voltage source inverter (VSI) --- doubly-fed induction generator --- wind power system --- sensorless control --- full order observer --- field oriented control --- grid connected system --- lithium batteries --- los minimization --- Modular Multilevel Converters --- optimization methods

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Power converters and electric machines represent essential components in all fields of electrical engineering. In fact, we are heading towards a future where energy will be more and more electrical: electrical vehicles, electrical motors, renewables, storage systems are now widespread. The ongoing energy transition poses new challenges for interfacing and integrating different power systems. The constraints of space, weight, reliability, performance, and autonomy for the electric system have increased the attention of scientific research in order to find more and more appropriate technological solutions. In this context, power converters and electric machines assume a key role in enabling higher performance of electrical power conversion. Consequently, the design and control of power converters and electric machines shall be developed accordingly to the requirements of the specific application, thus leading to more specialized solutions, with the aim of enhancing the reliability, fault tolerance, and flexibility of the next generation power systems.

Technology: general issues --- Energy industries & utilities --- power systems for renewable energy --- fault-tolerant photovoltaic inverter --- islanding detection --- energy storage system --- DC/AC converter --- voltage-source --- multilevel inverter --- PV systems --- neutral point clamped inverter --- flying capacitor inverter --- cascaded inverter --- renewable energy systems --- ultra-fast chargers --- input-series input-parallel output-series output-parallel multimodule converter --- cross feedback output current sharing --- reflex charging --- digital twin --- doubly-fed induction generator, electrical machines --- finite elements method --- monitoring --- real-time --- wound rotor induction machine --- subsynchronous control interaction --- super-twisting sliding mode --- variable-gain --- doubly fed induction generator --- photovoltaic system --- grid --- sliding mode control --- synergetic control --- fractional-order control --- converter–machine association --- direct drive machine --- Permanent Magnet Vernier Machine --- synchronous generator --- wind energy system for domestic applications --- renewable energy --- adaptive --- fuzzy --- feedback linearization --- photovoltaic (PV) grid inverter --- voltage source inverter (VSI) --- doubly-fed induction generator --- wind power system --- sensorless control --- full order observer --- field oriented control --- grid connected system --- lithium batteries --- los minimization --- Modular Multilevel Converters --- optimization methods --- power systems for renewable energy --- fault-tolerant photovoltaic inverter --- islanding detection --- energy storage system --- DC/AC converter --- voltage-source --- multilevel inverter --- PV systems --- neutral point clamped inverter --- flying capacitor inverter --- cascaded inverter --- renewable energy systems --- ultra-fast chargers --- input-series input-parallel output-series output-parallel multimodule converter --- cross feedback output current sharing --- reflex charging --- digital twin --- doubly-fed induction generator, electrical machines --- finite elements method --- monitoring --- real-time --- wound rotor induction machine --- subsynchronous control interaction --- super-twisting sliding mode --- variable-gain --- doubly fed induction generator --- photovoltaic system --- grid --- sliding mode control --- synergetic control --- fractional-order control --- converter–machine association --- direct drive machine --- Permanent Magnet Vernier Machine --- synchronous generator --- wind energy system for domestic applications --- renewable energy --- adaptive --- fuzzy --- feedback linearization --- photovoltaic (PV) grid inverter --- voltage source inverter (VSI) --- doubly-fed induction generator --- wind power system --- sensorless control --- full order observer --- field oriented control --- grid connected system --- lithium batteries --- los minimization --- Modular Multilevel Converters --- optimization methods

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Continuous cost reduction of photovoltaic (PV) systems and the rise of power auctions resulted in the establishment of PV power not only as a green energy source but also as a cost-effective solution to the electricity generation market. Various commercial solutions for grid-connected PV systems are available at any power level, ranging from multi-megawatt utility-scale solar farms to sub-kilowatt residential PV installations. Compared to utility-scale systems, the feasibility of small-scale residential PV installations is still limited by existing technologies that have not yet properly address issues like operation in weak grids, opaque and partial shading, etc. New market drivers such as warranty improvement to match the PV module lifespan, operation voltage range extension for application flexibility, and embedded energy storage for load shifting have again put small-scale PV systems in the spotlight. This Special Issue collects the latest developments in the field of power electronic converter topologies, control, design, and optimization for better energy yield, power conversion efficiency, reliability, and longer lifetime of the small-scale PV systems. This Special Issue will serve as a reference and update for academics, researchers, and practicing engineers to inspire new research and developments that pave the way for next-generation PV systems for residential and small commercial applications.

three-phase rectifier --- PFC --- switch-mode rectifier --- ZVS --- ZCS --- single stage micro-inverter --- burst control --- variable frequency control --- maximum power-point tracking --- grid-connected photovoltaic systems --- cascade multilevel converters --- multistring converters --- T-type converters --- power clipping --- ESS sizing --- grid-tied PV plant --- cascaded H-bridge --- photovoltaic inverter --- module level --- switching modulation strategy --- energy yield --- photovoltaic (PV) --- virtual synchronous generator (VSG) --- frequency response (FR) --- power reserve control (PRC) --- active power up-regulation --- dual inverter --- open-end winding transformer --- photovoltaic application --- filter --- DC–AC converters --- efficiency --- neutral-point-clamped inverter --- PV applications --- PV inverters --- PV systems --- quasi-z-source --- two-level inverter --- three-level inverter --- converter topologies --- partial shading --- photovoltaic (PV) arrays --- multiple maximas --- mismatch --- differential power processing (DPP) --- series-parallel (SP) --- total-cross-tied (TCT) --- bridge-linked (BL) --- center-cross-tied (CCT) --- quasi-Z-source inverter --- double-frequency ripple --- ripple vector cancellation --- shoot-through duty cycle --- modulation --- DC microgrid --- DC electric spring --- distributed cooperative control --- adaptive droop control --- consensus algorithm --- Electric spring --- hierarchical control --- coordinated control --- power decoupling control --- droop control --- microgrid --- microinverter --- variable dc-link voltage --- photovoltaic --- solar energy --- renewable energy --- residential systems --- PV generators --- active power --- reactive power --- Renewable energy --- grid codes --- capability curves --- transformerless inverter --- full bridge inverter --- leakage current --- NPC topology --- full-bridge inverter --- PV microinverters --- single-stage --- buck-boost --- tapped inductor --- modular multilevel converter --- photovoltaic power system --- grid integration --- control system --- distributed renewable energy source --- energy storage --- 1500 V photovoltaic (PV) --- reliability --- cost-oriented design --- DC–DC converter --- series resonance converter --- wide range converter --- bidirectional switch --- conversion efficiency