A hysteresis control method for three-phase current-controlled voltage-source PWM inverters is presented. The minimizes interference among phases, thus allowing phase-locked loop (PLL) of the modulation frequency inverter switches. theory discussed, and controller implementation described. Design criteria are also given. results experimental tests show excellent static dynamic performance.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

In this paper, a general-purpose fuzzy controller for DC-DC converters is investigated. Based on qualitative description of the system to be controlled, controllers are capable good performances, even those systems where linear control techniques fail, e.g., when mathematical not available or in presence wide parameter variations. The presented approach general and can applied any converter topologies. Controller implementation relatively simple guarantee small-signal response as fast stable...

The paper introduces the family of quasi-direct converters, i.e., forced-commutated AC/DC/AC power converters including small energy storage devices in DC link. In particular, case three-phase to converter is considered. Since minimization calls for instantaneous input/output balance, a proper control strategy needed. describes simple and effective technique which also provides high-power factor distortion supply currents. After discussion general properties design criteria both sections are...

A general-purpose sliding-mode controller is described, which can be applied to most DC-DC power converter topologies. It has the same circuit complexity as standard current-mode controllers, but provides extreme robustness and speed of response against supply, load, parameter variations. Moreover, contrary other techniques, proposed solution features constant switching frequency in steady state, synchronization external triggers, absence steady-state errors output voltage.< <ETX...

Smart microgrids offer a new challenging domain for power theories and compensation techniques, because they include variety of intermittent sources, which can have dynamic impact on flow, voltage regulation, distribution losses. When operating in the islanded mode, low-voltage smart also exhibit considerable variation amplitude frequency supplied to loads, thus affecting quality network stability. Due limited capability microgrids, distortion get worse, measurement accuracy, possibly...

This paper investigates the application of digital control for non-isolated single-inductor multiple-output step-down dc-dc converters operating in continuous-conduction mode. The accurate and independent each output requires a sophisticated architecture so as to minimize cross-regulation problem. adopted includes separate regulation common-mode differential-mode voltages. Due loop dependence on load current, variable-gain functional block has been investigated; this provision keeps gain...

Low-voltage microgrids can be seen as the basic tiles of smart grid patchwork owing to their capability efficiently manage distributed energy resources (DERs) in aggregate form. They support terms demand response, power quality, ride through capability, and at same time, they ensure electrical continuity loads, even case failure. This paper describes a simple effective approach by synergistic control electronic interfaces acting therein, i.e., utility interface (UI), installed point common...

This paper proposes an effective technique to control the power flow among different phases of a three-phase four-wire distribution system by means single-phase converters arbitrarily connected phases. The aim is enhance quality at point-of-common-coupling microgrid, improve voltage profile through lines, and reduce overall losses. based on master/slave organization where distributed act as slave units driven centralized master controller. Active, reactive, unbalance terms are processed...

A pulsewidth modulation (PWM) control technique suitable for fully controlled three-phase ac/dc converters is analyzed, which gives sinusoidal input currents and ideally smoothed dc voltage. The allows four-quadrant operation full-range of the power factor. An extension to a simplified converter scheme, capable one-quadrant operation, also considered. Operation analyzed under both ideal actual conditions. Control implementation design criteria are discussed experimental results reported.

The paper presents a fully digital control of single-phase boost power factor preregulators (PFPs) based on inductor (or switch) current and output voltage measurements. Input sensing is avoided using disturbance observer, which provides waveform proportional to the rectified input voltage. proposed solution multiloop structure for PFPs with an internal deadbeat conventional outer control, possibly fast dynamic response. resulting algorithm simple, accurate, robust respect parameter...

Smart microgrids offer a new application domain for power electronics. In fact, every distributed energy resource includes an electronic processor (EPP) to control the exchange with grid. If such EPPs perform cooperatively, all available sources and storage units can be fully exploited, resulting in reduced consumption from utility, high quality, increased hosting capability by utility. This paper shows that, even low-voltage meshed microgrids, where electrical distribution pattern is...

The Internet of Things (IoT) has led the way to smarter and ultimately more efficient cyberphysical systems (CPSs). An example such a CPS includes motor drives connected computer network controlling industrial processes. Another is recent European Union regulation that may enable utility customers become energy suppliers-i.e., formation transactive (TE) or local area networks (E-LANs) formed by integrated smart nodes cooperating accomplish system goals.

This paper presents a simple and robust control technique for distributed energy resources (DERs) in microgrids. The utilizes the full potential of DERs during grid-connected islanded operating modes. In mode, pursues quasi-optimum operation microgrid so as to reduce distribution losses voltage deviations while fully exploiting renewable sources. it effectively manages any available source, including storage devices, ensure safe smooth autonomous microgrid. addition, prompt adaptation...

In use far and wide for improved delivery control of the electricity supply, power electronics systems are both cause remedy system harmonic pollution problem. Here, authors describe how an insidious side-effect any solution involving converters is their generation high-frequency pollution-namely, conducted radiated noise in 100 kHz to MHz range-which can have adverse effect on operation surrounding electronic equipment. Solutions this problem also offered paper.

A novel approach to the design of sliding mode controllers for Cuk power converters is presented, which valid both complete status feedback (fourth-order controller) and reduced (second-order controller). According proposed criteria, control techniques ensure excellent static dynamic performances, also resulting in simple implementation minimum size energy transfer capacitor. Experimental results are reported, compared with those obtained other popular techniques. The has three main...

A quasi-resonant dc link soft switching inverter is presented, capable of PWM operation. It requires only two additional switches, and allows loss limitation in the resonant circuit. The modulation method adopted able to perform true operation at any index. Simulated experimental results are reported, confirming effectiveness proposed solution.

A resonant DC link scheme for soft-switched inverters, where the oscillation can be synchronized with inverter modulation, is proposed. The able to operate reduced commutation losses at a high switching frequency. Synchronization capability allows development of suitable modulation techniques that ensure improved waveform accuracy. system performance and control strategies were verified by simulation experimental tests, interesting features proposed confirmed.< <ETX...

This paper describes a three-phase active filter aimed at the compensation of reactive power and current harmonics symmetrical load. The employs an inductor for energy storage two-quadrant PWM bridge converter.

Smart grids offer a new challenging domain for power theories and compensation techniques, because they include variety of intermittent sources which can have dynamic impact on flow, voltage regulation, distribution losses. When operating in the islanded mode, smart micro-grids also exhibit considerable variation amplitude frequency supplied to loads, thus affecting quality network stability. Due limited capability micro-grids, distortion get worse, measurement accuracy possibly causing...

The advent of energy communities will revolutionize the market. However, exploiting their full potential requires innovations in structure and management low-voltage grids. End users shall be aggregated within microgrids, where physical interaction is possible coordinated operation power sources storage systems can achieved. Moreover, meshed network topologies enable multiple paths for flow. combination smart control networks dramatically improve microgrid performance terms quality,...

This paper proposes a simple and effective approach to control the distributed energy resources (DERs) in low-voltage microgrid, increase efficiency hosting capacity of microgrid itself, with only requirement narrow-band communication among loads generators. More specifically, aims at taking full advantage power capability allowed by renewable sources storage units, optimize voltage stability. The resulting architecture is scalable, ensures prompt response transients, provides proper sharing...

Abstract This paper presents a general control method that fully utilizes the inherent capability of AC‐fed PWM converters to compensate for reactive and harmonic currents absorbed by other loads. For this purpose, suitable definitions instantaneous active current power terms are introduced. Simulated results demonstrate capabilities proposed compensation method, which can also be implemented in existing systems, as only modifications section needed.

A PWM rectifier including an uncontrolled and a Cuk converter stage driven by sliding mode controller is described. Like other high-quality rectifiers, this solution allows low-distorted in-phase line current. Moreover, due to the control, fast stable response achieved, in spite of large output filter. Control complexity same as that standard current-mode controls. Converter analysis, design criteria, experimental results are reported.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML"...

Smart microgrids offer a new challenging domain for power theories and metering techniques because they include variety of intermittent sources which positively impact on flow distribution losses but may cause voltage asymmetry frequency variation. In smart microgrids, the distortion in presence poly-phase nonlinear loads can be also greater than usual lines fed by utility, thus affecting measurement accuracy possibly causing tripping protections. such context, reconsideration is required...