This paper presents an energy-balance control strategy for a cascaded single-phase grid-connected H-bridge multilevel inverter linking <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">n</i> independent photovoltaic (PV) arrays to the grid. The scheme is based on energy-sampled data model of PV system and enables design voltage loop linear discrete controller each array, ensuring stability whole range array operating conditions. adapted...

This paper presents the design of a low complexity fuzzy logic controller only 25-rules to be embedded in an energy management system for residential grid-connected microgrid including renewable sources and storage capability. The assumes that neither generation nor load demand is controllable. main goal minimize grid power profile fluctuations while keeping battery state charge within secure limits. Instead using forecasting-based methods, proposed approach use both rate-of-change increase,...

String inverter photovoltaic (PV) systems with bypass diodes require improved global maximum power point tracking (GMPPT) algorithms to effectively reach the absolute operating point. Several GMPPT have been proposed deal this problem, but most of them scanning wide voltage ranges PV array from nearly zero open-circuit that increases time and, in turn, causes energy loss. This paper presents a novel method which significantly restricts window search range and tracks peak rapidly all shading...

This work deals with the design of a Fuzzy Logic Control (FLC) based Energy Management System (EMS) for smoothing grid power profile grid-connected electro-thermal microgrid. The case study aims to an reduce impact on when renewable energy sources are incorporated pre-existing household appliances. scenario considers residential microgrid comprising photovoltaic and wind generators, flat-plate collectors, electric thermal loads electrical storage systems assumes that neither generation nor...

In this paper, a fixed-frequency quasi-sliding control algorithm based on switching surface zero averaged dynamics (ZAD) is reported. This applied to the design of buck-based inverter, and implemented in laboratory prototype by means field programmable gate array (FPGA), taking into account processing speed versus computational complexity trade-off. Three laws, namely sliding (SC), ZAD PWM-based have been experimentally tested highlight features proposed algorithm. According experimental...

This paper presents a power adaptor device, referred to as smart panel allowing the connection of additional energy sources and storage elements domestic photovoltaic (PV) grid-connected system. The output port is designed behave source/sink, thus enabling its hot-swap parallel renewable without modifying their maximum point (MPP). Moreover, device features characteristic with single controllable MPP allows control injected within operating range dc-ac inverter. work design principles such...

A two-loop control method for a boost converter, which combines fuzzy and sliding-mode methodologies, is presented. An inner loop controls the inductor current through sliding surface whose reference signal given by slower outer loop. This employs logic mechanism to implement PI controller that guarantees output voltage regulation results in an excellent transient response during start-up. The implementation requires standard analogue devices inexpensive 8-bit microcontroller Experimental...

The main benefits of fuzzy logic control (FLC) allow a qualitative knowledge the desired system’s behavior to be included as IF-THEN linguistic rules for dynamical systems where either an analytic model is not available or too complex due, instance, presence nonlinear terms. computational structure requires definition FLC parameters namely, membership functions (MF) and rule base (RB) defining policy. However, optimization generally carried out by means trial error procedure or, more...

This paper is devoted to the design of a sliding-mode control scheme for buck-based inverter, with programmable amplitude, frequency, and DC offset, no external sinusoidal reference required. A general procedure obtaining an autonomous (time independent) switching surface from time-dependent one presented. For this surface, system exhibits zeroth-order dynamics in sliding motion. On other hand, sliding-domain analysis, set restrictions established terms inverter output filter Bode diagram...

The application of the H/sub /spl infin// theory to control nonminimum phase dc-to-dc switching converters is investigated in this paper. Using an averaged linear model converter, a robust controller developed, guaranteeing stability and desired closed-loop dynamic response. Boost buck-boost with exhibit excellent performances good tracking high rejection capability disturbances introduced by changes load input voltage computer simulation. Experimental results are also obtained boost...

This paper presents a sliding-mode control design of boost-buck switching converter for voltage step-up dc-ac conversion without the use any transformer. approach combines step-up/step-down ratio capability with robustness properties control. The proposed strategy is based on two sliding-control laws, one ensuring full-bridge buck proper conversion, and other boost guaranteeing global dc-to-ac ratio. A set criteria complete procedure laws are derived from small-signal analysis large-signal...

A perturb and observe algorithm based on both the power‐current characteristic of a photovoltaic (PV) panel sliding‐mode control input inductor current an associated converter is investigated in static application. single ended primary inductance (SEPIC) charging battery from PV generator illustrates procedure whose effectiveness proved with experimental results. The reported technique appropriate for distributed maximum power point tracking systems output series connected DC–DC switching...

A fuzzy logic controller design for the battery management of a grid-tied real domestic microgrid including 6 kWp PV and 6kW wind power renewable generators is presented. The parameters undertaken on basis minimization set quality indices such as dynamic range variation exchanged with grid. features proposed approach are highlighted yearly data by numerical simulations profile injected into grid state charge.

This paper presents the design of an optimal Energy Management System (EMS) based on a Fuzzy Logic Controller (FLC) for residential grid-connected microgrid with hybrid renewable generation (wind, photovoltaic) and storage system. The aim fuzzy EMS is to minimize grid fluctuations preserve system lifetime. proposed uses FLC anticipate appropriate value power regarding energetic rate-of-change battery State-of-Charge (SOC). performance verified through numerical simulations using real data...

Hydropower systems are the basis of electricity power generation in Ecuador. However, some isolated areas Amazon and Galapagos Islands not connected to National Interconnected System. Therefore, based on renewable energy sources (RES) emerge as a solution increase coverage these areas. An extraordinary case occurs due their biodiversity flora fauna, where primary source comes from fossil fuels despite significant amount solar resources. RES use, especially photovoltaic (PV) wind power, is...

This paper investigates the use of neural networks for identification and control power converters. A nonparametric model a dc-to-dc switching converter implemented by means network emulator identifies dynamics in cases uncertainty load parameter. pseudo-linearization technique resulting regulation closed-loop linear dynamic behavior is also controller. Simulation results PWM boost under large-signal operation illustrate both applications applications.

This paper applies a dynamical electrical array reconfiguration (EAR) strategy on the PV modules of grid-connected system based plant oriented (PO) configuration, in order to improve its energy production when operating conditions solar panels are different, such as case partial shadowing or module failure. The EAR is carried out by inserting controllable switching matrix between generator and central inverter, which allows reconnection available depending their incident irradiance estimated...

A general nonlinear continuous formulation procedure for large-signal analysis of switching DC-DC converters is presented. The method can be applied in either the two conduction modes, and it easily programmed computer-aided with small simulation time. boost regulator operating constant-frequency current-programmed mode used to illustrate application method. stability graph subsequently developed facilitate design regulators applications. provides an estimation values input voltage load...

A dynamic interconnection of PV modules based on an irradiance equalization algorithm in grid-connected systems a plant oriented configuration is presented. The maximum output power at the generator level obtained with approach similar to that module integrated

This paper presents an energy-sampled data model of a cascade H-bridge multilevel converter for single-phase multi-string grid-connected photovoltaic systems. Based on this control scheme the power is obtained. The achievement DC-AC conversion with efficient PV energy extraction, low harmonic distortion and output unity factor validated simulation results

The problem of stabilizing a boost regulator in large-signal situations using linear control laws is derived by means circuit-oriented procedure. After establishing circuit model for the including state-feedback, conditions passivity resulting two-port are studied. As consequence, law derived, thus ensuring global stability even if saturation taken into account. Subsequently, analysis performed, order to design desired dynamics and robust behavior switching regulator. nonlinear shows that...