Starting from the current need for safety of energy systems, in which power transformers play a key role, study health service is difficult and complex task, since assessment consists identifying indicators that can provide accurate data on extent degradation transformer components subcomponents, order to establish model predicting remaining life transformers. Therefore, this paper proposes assessing by diagnosing condition based index (HI) obtained multi-parameter analysis. To determine...

Power transformers play an important role in electrical systems; being considered the core of electric power transmissions and distribution networks, owners users these assets are increasingly concerned with adopting reliable, automated, non-invasive techniques to monitor diagnose their operating conditions. Thus, monitoring conditions has evolved, sense that a complete characterization oil–paper insulation can be achieved through dissolved gas analysis (DGA) furan compounds analysis, since...

The field-oriented control (FOC) strategy of a permanent magnet synchronous motor (PMSM) in simplified form is based on PI-type controllers. In addition to their low complexity (an advantage for real-time implementation), these controllers also provide limited performance due the nonlinear character description equations PMSM model under usual conditions relatively wide variation load torque and high dynamics speed reference. Moreover, number significant improvements systems, FOC strategy,...

The field oriented control (FOC) strategy of the permanent magnet synchronous motor (PMSM) includes all advantages deriving from simplicity using PI-type controllers, but inherently performances are limited due to nonlinear model PMSM, need for wide-range and high-dynamics speed load torque control, also parametric uncertainties which occur especially as a result variation combined rotor-load moment inertia, resistance. Based on fractional calculus integration differentiation operators, this...

In this paper, based on a benchmark the performance of Unified Power Quality Conditioner (UPQC), improvement is presented comparatively by using Proportional Integrator (PI)-type controllers optimized Grey Wolf Optimization (GWO) computational intelligence method, fractional order (FO)-type differential and integral calculus, PI-type controller in tandem with Reinforcement Learning—Twin-Delayed Deep Deterministic Policy Gradient (RL-TD3) agent. The main components UPQC are series active...

Power transformers are essential elements in the production and distribution of electricity, keeping them optimum operating condition is a constant concern for specialists field. The power mainly determined by mixed insulation system, i.e. solid cellulose paper liquid insulating oil insulation. identification method, described this order to determine fault based on fact that assessment their namely made oil. This why Three Ratio Technique (TRT) used with good results early detection...

This article presents the control of a grid connected PV (GC-PV) array system, starting from benchmark. The structure used in this was cascade-type structure, which PI or synergetic (SYN) controllers were for inner loop id and iq currents sliding mode (SMC) outer udc voltage DC intermediate circuit. paper mathematical model together with main component blocks: simulated inputs array; itself; MPPT algorithm; DC-DC boost converter; current measurements circuit; load connection to power grid;...

This article presents a sensorless MPC (Model Predictive Control) for PMSM (Permanent Magnet Synchronous Motor) in which the rotor speed is provided by MRAS Reference Adaptive System) observer, and general control strategy FOC (Field Oriented type. The results of numerical simulations show superiority system compared to type case parameter variation rapidly varying torque load with random component. relatively low complexity number arithmetic operations required implement estimation...

Based on the advantage of using reinforcement learning process control, provided by fact that it is not necessary to know exact mathematical model and structure its uncertainties, this article approaches possibility improving performances PMSM (Permanent Magnet Synchronous Motor) control system based FOC (Field Oriented Control) strategy, correction signals a trained agent, which will be added u <inf xmlns:mml="http://www.w3.org/1998/Math/MathML"...

Starting from the fact that one of global control strategies Permanent Magnet Synchronous Motor (PMSM), namely Direct Torque Control (DTC) type strategy, is characterised by inner flux and torque loop usually uses hysteresis ON-OFF controllers oscillations introduced them have to be cancelled out outer speed controller (which a PI whose performance good around operating points for relatively small variations external parameters disturbances caused in particular load variation), while...

On-line monitoring of function and condition parameters the efficiency cooling system are key elements in determining working transformers. This paper presents implemented hardware software solutions for carrying out winding temperature on-line using fiber optic sensors. The actual is a measurand which defines condition, load capacity operating life By control power transformer windings sensors, ICMET Craiova aligned itself to requirements international standards.

This article presents the sensorless control system of a Permanent Magnet Synchronous Motor (PMSM), where speed controller consists Multiple - Artificial Neural Networks (M-ANN) and rotor is provided by Sliding Mode Observer (SMO). The performance proposed presented in comparison with classic Field Oriented Control (FOC) system. implementation load torque observer allows selection specially trained corresponding ANN to obtain optimum over variation ranges. PMSM equations, observers main...

In the case of using a Permanent Magnet Synchronous Motor (PMSM) linear model limited-range parametric variations and relatively low dynamic load torque, Field Oriented Control (FOC) type strategy ensures good performance PMSM control. Therefore, when non-linear wide-range high backstepping-type controller is proposed, whose tuning parameters are optimized by Particle Swarm Optimization (PSO) method. By designing an Extended State Observer (ESO), which provides estimate rotor position speed...

Starting from the classic FOC (Field Oriented Control) structure of a PMSM (Permanent Magnet Synchronous Motor), this article presents comparative performance control system when tuning PI-type speed controller is performed both in conventional way (using Ziegler-Nichols method supplemented by trial and error method), using three computational intelligence specific algorithms, namely: Genetic Algorithm (GA), Simulated Annealing (SA) algorithm, Reinforcement Learning (RL) - Twin Delayed Deep...

This paper presents a diagnostic system which implements several most widely used methods, using fuzzy logic, for fault diagnosis in power transformers the dissolved gas analysis and furan derivatives analysis. A case study carried out transformer is presented validation of system. The results obtained led to rehabilitation putting it into service within normal parameters. Our open that mean can exchange data (data input results) wide range formats like Excel files, MySQL database OPC...

This article presents the study of control system a Permanent Magnet Synchronous Motor (PMSM) based on Field Oriented Control (FOC) strategy, where mathematical model PMSM may include uncertainties parameter values, and external disturbance represented by load torque be characterized significant sudden variation. In this case, is Linear Adaptive Disturbance Rejection Controller (LADRC) speed controller. The LADRC type controller an Extended State Observer (ESO), which performs estimation...

This article presents the development stages of real-time implementation for a Permanent Magnet Synchronous Motor (PMSM) control system. The structures specific to Field Oriented Control (FOC) strategy, hardware elements, and software programming environments used are presented. These can be presented in chained manner form such as: Model-In-the-Loop (MIL), Software-In-the-Loop (SIL), Processor-In-the-Loop (PIL), Hardware-In-the-Loop (HIL). Moreover, addition presentation these stages, also...

In this article, starting from a benchmark represented by Direct Current-to-Direct Current (DC-DC) three-phase power electronic converter used as an interface and interconnection between the grid DC microgrid, we compare performances of series control structures—starting with classical proportional integrator (PI) type continuing more advanced ones, such sliding mode (SMC), integer-order synergetic, fractional-order (FO) controllers—in terms maintaining constant voltage microgrid. We present...

One of the elements that contribute to increasing reliability control system a Permanent Magnet Synchronous Motor (PMSM) is replacement speed transducers with software-implemented observers. Based on this, this paper concern sensorless PMSM using Direct Torque Control (DTC) type strategy, in which observer used combination Reinforcement Learning - Twin Delayed Deep Deterministic Policy Gradient (RL-TD3) agent increase accuracy rotor estimation. The latter, after training stage, can provide...

In this article we'll tackle the control of multi-motors electric drives with high dynamic, rapid changes in torque and speed, rigid or flexible coupling motors, where strategy is FOC (Field Oriented Control) for each distributed local network using CANopen protocol.In surface mining industry, from which drive application selected, general trend toward asynchronous motors short-circuit rotor, due to advantages motor both terms design operation.In order achieve variable must be used static...

This article presents a structure for speed control in PMSM drive by compensating the effect of delay fed into loop sensor (Tachogenerator) using Smith Predictor. The inner current and torque follows general lines FOC (Field Oriented Control) strategy terms describing motor operation equations d-q model on rotor reference frame (after Clark Park transformations), obtaining maximum setting to zero d-axis. system is cascade where outer loop, fixed part together with PMSM. For modeling part, 2...

This article presents a sensorless control structure for PMSM (Permanent Magnet Synchronous Motor), with MRAC (Model Reference Adaptive Controller) type speed controller, FOC (Field Oriented Control) overall strategy, and d-q axis reference system, which the Id current set to zero is selected reasons of torque maximization, supplied by adaptive controller output. The rotor position are provided back-EMF (back electromotive force) sliding mode observer. numerical simulations results obtained...

Starting from the capabilities of controllers developed using fuzzy logic on modeling and equalization nonlinearities, just as mathematical model a Permanent Magnet Synchronous Motor (PMSM) is nonlinear, this article presents control system PMSM based three neuro-fuzzy ensuring continuous adjustment tuning parameters Kp Ki PI-type speed controller. When there high-dynamics rotor reference significant variation load torque, PI controller with fixed parameters, even when Particle Swarm...