The use of powerful modular multilevel converters (MMC) for FACTS applications has resulted in the development new STATCOM products, which have been already applied a number projects, due to its superior characteristics and competitive costs. MMC simplifies equipment design, improves response time reduces losses. This paper introduces this type, discussing advantages technology grid access applications.

In this technical note, a new model predictive controller for tracking arbitrary periodic references is presented. The proposed based on single layer that unites dynamic trajectory planning and control. A design procedure to guarantee the closed loop system converges asymptotically optimal admissible while guaranteeing constraint satisfaction provided. addition, constraints of optimization problem solved by do not depend reference, allowing sudden changes in reference without loosing...

This paper presents the application of economic predictive control to minimize cost operating a nonisolated microgrid connected an electric utility (EU) subject periodic internal demand. The considered is composed set photovoltaic panels and two storage systems it can buy sell energy EU. first system cluster batteries lead acid, second based on hydrogen storage. A function that describes plant taking into account aspects such as market costs, degradation microgrid, amortization costs...

The growth of the global population, together with climate change and water scarcity, has made shift towards efficient sustainable agriculture increasingly important. Undoubtedly, recent development low-cost IoT-based sensors actuators offers great opportunities in this direction since these devices can be easily deployed to implement advanced monitoring irrigation control techniques at a farm scale, saving energy decreasing costs. This paper proposes an economic periodic predictive...

Two nonconventional HVDC converter arrangements are compared. These include the capacitor commutated (CCC) in which series capacitors included between transformer and valves, controlled (CSCC), based on more conventional topology, inserted AC filter bus network. Results show that both options have comparable steady state transient performance. Danger of ferroresonance with CSCC option is eliminated by controlling amount compensation.

This paper develops an accurate and general stability model for the ASC (thyristor controlled reactor). The is valid both capacitive inductive regions of operation. It in that instantaneous voltage current waveforms also fundamental component capacitor (needed stability) are determined every half-cycle by solving differential equations circuit. capable incorporating any control algorithms. validity demonstrated comparing with Electromagnetic Transient Program (EMTP) digital simulations using...

Este estudo tratou de uma pesquisa bibliográfica acerca do papel enfermeiro no processo captação órgãos e tecidos para transplantes. Teve como objetivos: apontar o tecidos; demonstrar a relação estabelecida entre enfermeiros familiares potenciais doadores descrever os cuidados que devem ser realizados pela equipe enfermagem junto ao paciente com morte encefálica. Pesquisa bibliográfica, exploratória, descritiva, abordagem qualitativa. O levantamento dos artigos científicos foi realizado...

In this paper, we propose a novel robust model predictive controller for tracking periodic signals linear systems subject to bounded additive uncertainties based on nominal predictions and constraint tightening. The proposed joins optimal trajectory planning control in single optimization problem guarantees that the perturbed closed-loop system converges asymptotically neighborhood of an reachable while robustly satisfying constraints. addition, maintains recursive feasibility even presence...

This paper addresses the management of drinking water networks (DWNs) regarding a multi-objective cost function by means economically-oriented model predictive control (EMPC) strategies. Specifically, assuming demand and energy price as periodically time-varying signals, this shows that EMPC framework is flexible to enhance DWNs without relying on hierarchical schemes require use real-time optimisers (RTO) or steady-state target (SSTO) in an upper layer. Four different MPC strategies are...

Damping power system resonances by passive filters can introduce additional unwanted which, under difficult circumstances, even lead to switching off of these filters. Active damping using modern electronics and controls is presented in this paper as a solution so improve network operation efficiently. Theoretically obtained results are verified lab model.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

This paper presents a control scheme in order to manage laboratory-scale microgrid economic way. The main aim of this is the comparison between different strategies. located Seville (Spain) and incorporates an electrolyzer, metal hybrid storage, fuel cell battery set, as well electronic load generator components. allows us study smartgrids with renewable sources (emulated by generator) energy storage based on hydrogen under realistic scenarios. objective regulate plant fulfilling demand....

In this paper we propose to apply a novel economic robust predictive controller for periodic signals following constraint tightening procedure an uncertain discrete time algebraic-differential linear model of community micro-grid. The system considered has been obtained from the power balance equations three nano-grids taking into account bounded additive perturbations. This joins dynamic and trajectory planning tracking in single layer disturbances, algebraic constraints character system.

This paper presents the application of economic predictive control to minimize cost operating a non-isolated micro-grid connected an electric utility subject periodic internal demand. A function that describes plant taking into account aspects such as market costs, degradation and amortization costs is proposed. Based on this considering nature plant, controller capable adapting sudden changes while guaranteeing stability recursive feasibility has been successfully tested using LTI model...

This work presents a linear quadratic model predictive controller (MPC) implemented in an industrial programable logic (PLC). The control law is calculated by solving on-line the programming problem derived from optimization of MPC. Nesterov's fast gradient algorithm has been used to solve corresponding MPC problems with input constraints. Schneider Electric M340 using standard structured language IEC 1131.1 norm. memory and computational time requirements proposed implementation have...

Active filters are frequently considered for HVDC systems because they provide superior harmonic performance and avoid problems which often encountered in passive filter applications, like detuning, changes the impedance of network resonance. This paper presents concepts actually regarded design active systems. Some installed AC DC filters, as well relevant aspects related to experience with these applications presented. The aspect control interactions among is shortly discussed.

As people usually perform their daily activities inside buildings, it is very important to achieve a trade-off between users' comfort and energy costs derived from it. This paper presents two novel concepts within the framework of energy-consumption management: productiveness utility. Therefore, main objective this work provide an optimal forecast power consumption for office room, as function Real-Time Prices (RTP) Day-Ahead Pricing (DAP). The use real time prices allows more efficient...

Model Predictive Control (MPC) is the most used advanced control technique in process industries, since it ensures stability, constraints satisfaction and convergence to setpoint. The optimal setpoint calculated by Real Time Optimizer (RTO), minimizing economic objective taking into account operational limits of plant. Since RTO employs complex stationary nonlinear models perform optimization a larger sampling time than controller, setpoints may be inconsistent for MPC layer performance...

The harmonic interaction between AC- and DC-systems has been discussed in various publications with respect to both characteristic noncharacteristic harmonics injected into AC-power transmission systems by HVDC converters. This paper presents a method determine the transfer of from supplying AC network DC system vice versa. imbalance fundamental voltages is introduced mathematical model corresponding symmetrical components, e.g. their positive negative components. presented valid for power...

One of the challenges model predictive control is achieving a large domain attraction with small prediction horizon, in order to reduce computation time and ease its implementation embedded platforms. The can be enlarged by increasing at expense an increase number decision variables, or enlarging terminal set. In MPC for tracking set addition artificial equilibrium point as variable, while maintaining stability closed loop system. this paper we propose extension formulation that adds single...