This paper applies finite control set model predictive (FCS-MPC) for dynamic reactive power compensation using a hybrid active filter (HAPF). The FCS-MPC uses based on LCL-filter equations to predict the system behavior and optimize action. In fact, application of in grid-connected converters with LCL-Filter is quite recent. algorithm very promising technique electronics its use has not been reported literature yet. multivariable structure along an adaptive notch damp resonance. main purpose...

Smart impedance is a new way to look at hybrid active power filters. As originally proposed in the literature, filters were presented improve physical limitation of tuned passive A conditioner named smart eliminate need filter tuning procedure, whole process performed electronically. The topology able manipulate displacement factor and perform multiple frequency harmonic current mitigation same time. In weak systems, where source not negligible, like grids, guaranties voltage regulation...

Canonical switching cell is known as the basic building block of dc-dc buck, boost, buck-boost, Ćuk converters, voltage/current source inverters (VSI/CSI) well multilevel converters (MLCs). This article reveals existence another a singular structure canonical cell. The proposed new can constitute single-ended primary-inductor converter (SEPIC), Zeta and Z-source converters. Each cells has simplest form with two complementary switches, one inductor capacitor. An approach to construct by...

In this paper, the concept of grid-connected inverter without interfacing filters is proposed. Conventional grid-side voltage sensors and traditional phase-locked loop (PLL) are removed. Only grid current feedback to implement synchronization decoupled P/Q control. 60-Hz sinusoidal output achieved relying on impedance only. The controller employs virtual couple with a wide range variations. With proposed controller, capable 1) decoupling real reactive power; 2) synchronizing frequency...

Isolated microgrids, due to the high values of output converter impedances, suffer power quality problems, such as harmonic distortion and resonances. These impedances are normally LCL filter needed suppress switching ripple converters. As complex they dependent on frequency, therefore very sensitive content load current. This leads a significant microgrid voltage which results in undesirable levels. Hybrid active filters reasonable choice for compensation allowing good filtering performance...

This study presents an application for a series VSC (voltage source converter) in distribution grids power flow management. Series devices have been widely studied FACTS (flexible AC transmission systems), however, more recently these gained increased interest applications loading balance medium voltage grids. As the number of distributed generation (DG) units increases, increasing capacity and reliability while maximizing benefits installed DGs behavior is ever important task. In this...

This paper presents a novel strategy for online parameter estimation in hybrid active power filter (HAPF). HAPF makes use of existing capacitor banks which it combines with an (APF) order to dynamically compensate reactive power. The equipment is controlled finite control set model predictive (FCS-MPC) due its already well-known fast dynamic response. similar grid-connected LCL-filtered converter, so the direct current can cause resonances and instabilities. To solve this, indirect control,...

This paper proposes a synchronization scheme for grid-connected Voltage Source Inverters (VSI) without physical interface inductors, voltage sensing or conventional PLL algorithms. Especially, issues with converters connected trough long cables are addressed. These present non-negligible LC characteristics that can lead to resonance peaks degrading current waveforms. A virtual impedance is used as grid coupling element, providing virtualized point within software using only already available...

Hybrid active series power filters, as originally proposed in the literature, presents a way to improve physical limitation of tuned passive filters. However, these improvements are restricted single filter parameter, i.e., quality factor or factor. To overcome limitations, hybrid system composed by impedance, capacitor bank and appropriated control strategy, called smart is proposed. The completely eliminates necessity classical tuning procedure, which requires capacitor/inductor...

This article presents the theoretical development and implementation of an adaptive algorithm for real-time measurement electrical powers under sinusoidal, non-sinusoidal, balanced, unbalanced conditions according to definitions given by IEEE Standard 1459-2010. The is based on filter notch implementation, where parameters are adjusted tracking amplitude phase variations improve accuracy power measurement. uses coefficients calculate powers, resulting in low computational burden. results...

This paper presents the development and operation on 13.8kV distribution systems of a peak-shaving equipment with battery energy storage. injects active power to grid during peak times (when cost is higher) charges its banks from at off-peak has low producing cost). The based multilevel converter coupled through 2.4kV:13.8kV transformer. In addition functionality, feature compensation harmonics voltage included, without need for any extra sensor nor hardware (apart ones already in use...

Renewable resources power generation systems are mainly constituted by converters. These converters can be controlled in several ways to execute different functions inside microgrids. Some of the cannot operate on isolated grids, that is, without connection electrical grid. Therefore, there whose purpose is provide a voltage reference so other continue deliver independent grid presence. devices called grid-forming and usually converter associated an energy storage system. This paper presents...

This paper presents a submodule (SM) capacitor voltage balancing scheme for the Switched Capacitor Modular Multilevel Converter (SC-MMC), which employs middle connecting upper and lower arms does not require large physical arm inductors. Only small stray/parasitic inductance is enough to limit inrush current during SM's switching instants. topology directly derived from generalized multilevel converter. The SC-MMC has benefit of providing same number output levels than conventional MMC using...

This paper proposes a modification on the Hybrid Active Series Filter (HASF) creating topology named Var Compensator (HAVarC) suitable to manipulate, in continuous way, displacement power factor or voltage regulation. The HAVarC is composed by small rating Power (APF) series with capacitor bank. main objective of this control reactive injected into system controlling applied its terminals. automatically compensates flow order guarantee desired (DPF) rated and no parameters knowledge are...

This paper presents the development of a peak-shaving equipment, composed by multilevel converter in cascaded H-bridge topology and battery banks on DC links. Between specific time periods, when demand is higher, equipment injects active power from batteries into grid to provide support system. During other times day, lower, charges its with exceeding (and low producing cost) energy grid. The charge discharge control algorithms are implemented digital signal processor (DSP). precise day...

The nonlinear loads can be divided in two distinct groups, according to its harmonic characteristics, called current-source type or voltage-source loads. first one modeled as a current source and the second voltage source. Traditional Shunt Active Filters are not effective for compensating harmonics from This work presents use of Hybrid Filter mitigation both Practical results demonstrate that is compensation any load condition, independent characteristics.

This paper describes the newest hybrid active filter topology, Smart Impedance, under unbalanced harmonic mitigation in three-phase four-wire systems. A modular approach permits selective compensation of components, no matter current imbalance level or sequence components flowing through line. The Impedance effectiveness highlights its capability mitigating harmonics from voltage-source current-source nonlinear loads emerging as an option to Parallel Active Filter Passive and classical...

The modular multilevel converter (MMC) is one of the most promising topologies for high- and medium-voltage applications. However, conventional MMC relies on large arm inductance complicated feedback control to maintain submodule (SM) capacitor voltages balanced, which requires a number voltage sensors current loops. In contrast perspective, can be regarded as derivative from general topology based switched-capacitor (SC) structure. SC structure endows excellent properties MMC, such minimum...

This work proposes a new control strategy based on Adaptive Notch Filter applied to Hybrid Active Var Compensator. The proposed using Filters can correctly identify the reactive power flowing through distribution system even under unbalance and nonsinusoidal conditions. is simulated implemented showing all its capability. Practical results are presented in order prove effectiveness of topology improving behavior capacitor bank normally used as compensator.

A simple control strategy for the Hybrid Active Series Power Filter (HASPF) based on P+Resonant compensators is presented. The structure allows compensation of multiple selective harmonic components simultaneously. No mains voltage synchronization techniques, like a PLL, nor any sensing are demanded. entire algorithm performed directly in abc frame. Practical results presented to demonstrate efficacy.

This paper presents some preliminary results on the use of multilevel converters aiming electronically controlled power systems applications at distribution/transmission voltage levels. A guide configuration PWM modules TMS320F28335 DSP is presented, including particularities required for phase-shift modulation. Experimental are presented a seven level converter (composed three H-bridges connected in series) with resistive load.