In this paper, a new topology for cascaded multilevel converter based on submultilevel units and full-bridge converters is proposed. The proposed significantly reduces the number of dc voltage sources, switches, IGBTs, power diodes as output levels increases. Also, an algorithm to determine sources magnitudes To synthesize maximum at voltage, optimized various objectives, such minimization gate driver circuits capacitors, blocking switches. analytical analyses losses are also presented....

In this paper, a new topology of cascaded multilevel converter is proposed. The proposed based on connection single-phase submultilevel units and full-bridge converters. Compared to the conventional converter, number dc voltage sources, switches, installation area, cost significantly reduced as steps increases. order calculate magnitudes required three methods are Then, structure optimized in utilize minimum switches produce high output steps. operation performance verified by simulation...

This paper presents a new decentralized robust strategy to improve small and large-signal stability power-sharing of hybrid AC/DC microgrids its performance for nonlinear unbalanced loads. In addition the sliding mode controller DC/DC converters, sake improving power sharing regulating active reactive powers injected by distributed energy resources, moreover, controlling harmonic negative-sequence current in presence loads, two separate controllers positive sequence control negative are...

This paper proposes a new single-phase transformerless photovoltaic (PV) inverter for grid-tied PV systems. The topology is derived from the concept of charge pump circuit in order to eliminate leakage current. It composed four power switches, two diodes, capacitors, and an <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LCL</i> output filter. neutral grid directly connected negative polarity panel that creates constant common mode voltage...

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> Multilevel converters are very interesting alternatives for medium and high-power applications. The main reason is the increase in number of output voltage levels its apparent frequency. This paper presents a new configuration flying capacitor multicell (FCM) converter. advantages proposed converter, comparison with FCM stacked converters, doubling rms levels, improving frequency spectrum,...

This paper presents a new extendable single-stage multi-input dc–dc/ac boost converter. The proposed structure comprises of two bidirectional ports in the converter's central part to interface output load and battery storage, several unidirectional input get powers from different dc sources. In fact, topology consists sets parallel dc–dc converters, which are actively controlled produce independent voltage components. Choosing pure or dc-biased sinusoidal values as converter reference...

A new evolutionary algorithm known as the shuffled frog leaping is presented in this paper, to solve unit commitment (UC) problem. This integer-coded has been developed minimize total energy dispatch cost over scheduling horizon while all of constraints should be satisfied. In addition, minimum up/down-time have directly coded not using penalty function method. The proposed applied ten up 100 generating units, considering one-day and seven-day periods. most important merit method its high...

All control methods for the decentralized of distributed energy resources (DERs) in microgrid need to calculate power decide whether produced will be able stabilize system. Unlike previous research that is limited primary and secondary levels, presented droop-based scheme includes detailed modeling three hierarchical levels either grid-connected or autonomous modes. A new complementary loop added determines controls reactive reference by a novel application radial basis function neural...

Many methods have been proposed to determine the optimal location and capacities of distributed generation (DG) units reach lowest value for system losses. In this study, combination analytical genetic algorithm is used allocation multiple DGs in a distribution network minimise This guarantees convergence accuracy speed DG allocation. active power, power factor, are simultaneously considered during losses minimisation. The utility will dictate only maximum if installed by owner. However,...

In this paper, a multi-objective algorithm is presented for optimal power management and design of hybrid Wind/Photovoltaic/ generation system with hydrogen energy storage including electrolyzer, fuel cell tank to supply demand in microgrid system. The units are intrinsically non-dispatchable moreover, the major components i.e. wind turbine generators, photovoltaic arrays DC/AC converter may be subjected failure. Also, solar radiation, speed load data assumed entirely deterministic. goal use...

A new decentralized hierarchical control scheme is presented to improve power sharing of multidistributed energy resources microgrids including nonlinear and sensitive loads. In this systems, electronically coupled distributed are responsible perform the compensation reduce voltage harmonics at point-of-common coupling. The proposed adds a virtual impedance scheme, calculation unit, also complementary loop small- large-signal stability margins includes detailed modeling for all levels...