This paper presents the detailed design, analysis, and application of controller for a shunt active power filter based on pulsewidth modulation dc-to-ac voltage source converter. The is mainly tailored to compensate harmonic currents nonlinear loads connected mains. However, it can also achieve reactive-power compensation mains-current balancing when required. has two-layer structure. outer layer generates current references inner layer. former uses plug-in discrete-time repetitive algorithm...

This paper presents a control system based on repetitive controller to compensate for key power-quality disturbances, namely voltage sags, harmonic voltages, and imbalances, using dynamic restorer (DVR). The scheme deals with all three disturbances simultaneously within bandwidth. structure is quite simple yet very robust; it contains feedforward term improve the transient response feedback enable zero error in steady state. well-developed graphical facilities available PSCAD/EMTDC are used...

Multi-terminal High Voltage Direct Current (HVDC) using Source Converters (VSC-HVDC) is a promising technology which provides flexible control of active and reactive power facilitates remote renewable energy integration, above all long cables. This paper analyses an strategy for multi-terminal VSC-HVDC systems tailored to enhance transient stability hybrid AC/DC grids. The proposed controls each VSC frequency measurements terminals. Its performance compared in controlled only local the AC...

A generalized d-q loss model applicable to permanent magnet synchronous motors, reluctance induction motors and DC is presented. model-based minimization algorithm of easy implementation proposed, based on the model. Core saturation taken into account. The paper reviews loss-minimization schemes previously presented in literature for specific types motor. It shows how all these can be derived from here. Results are compared with those reported literature. Finally, experimental results an...

This paper proposes a new control strategy for the reactive-power injections of voltage-source converters (VSCs) in high-voltage direct-current multi-terminal systems to improve power system transient stability. A supplementary signal is provided each converter. Its value proportional frequency deviation its corresponding AC bus with respect weighed-average stations. The purpose increase (decrease) electromagnetic torque generators close those terminals, which above (below) used. all VSC...

The objective of this paper is to compare the performance thyristor-controlled reactors (TCR) and shunt-connected PWM voltage source inverters (PWM-VSI) for compensation flicker caused by arc furnaces. First all, arc-furnace principles are presented in order explain main characteristics problem. Secondly, traditional TCR control analyzed. An improved measuring procedure suggested enhance showing that it achieves faster than more methods. Thirdly, PWM-VSI described detail using Park's...

This paper presents a generalized d-q loss model applicable to permanent-magnet synchronous motors, reluctance induction motors and DC motors. is used as the basis of loss-minimization expression easy implementation. Core saturation taken into account. The reviews model-based schemes previously presented in literature for specific types It shows how all these models can be derived from general one proposed here. results using are compared those reported literature. Finally, experimental an...

The always-increasing switching frequency of modern solid-state power switches, together with the application multi-converter topologies, make it possible to use pulse width modulation (PWM) in high applications STATCOMs (static synchronous compensators). This paper investigates control system for a PWM-based STATCOM. First all, discrete-time model STATCOM is derived take into account implementation controller. Secondly, algorithm detailed. It ensures decoupled real and reactive exchanged...

This paper proposes systematic procedures to estimate the circuit parameters of an inverter-fed vector-controlled interior permanent-magnet synchronous motor when torque measurement is not available. The methodology presented here does neglect iron losses. New have been developed and justified since international standard recommendations (International Electrotechnical Committee Standards) cannot be applied. Experimental results from a test rig are in this validate most important...

The massive deployment of microgrids could play a significant role in achieving decarbonization the electric sector amid ongoing energy transition. effective operation these requires an Energy Management System (EMS), which establishes control set-points for all dispatchable components. EMSs can be formulated as classical optimization problems or Partially-Observable Markov Decision Processes (POMDPs). Recently, Deep Reinforcement Learning (DRL) algorithms have been employed to solve latter,...

This paper proposes systematic procedures to estimate the circuit parameters of an inverter-fed vector controlled interior permanent magnet synchronous motor when torque measurement is not available. The methodology presented here does neglect iron losses. New have been developed and justified, because international standard recommendations (IEC standards) cannot be applied. Experimental results from a test rig are in validate most important contributions. Thanks proposed, secondary effects...

Dynamic voltage restorers (DVRs) are a cost-effective solution to protect sensitive loads against sags in mediumand high-power applications because the power required for compensation is only fraction of load rated power. Voltage sag with DVRs requires robust detector that has be able address distorted grid conditions. Also, should detected fast order guarantee adequate protection. In this paper, detection algorithm DVR proposed and comprehensively analyzed. It shown provides harmonic...

High Voltage Direct Current Transmission (HVDC) systems are called to play an important role in modern electric power systems. Among the many aspects of HVDC currently under active research, this paper presents a proposal design supplementary controllers multi-terminal based on Source Converters (VSC-MTDC, for short) damp electromechanical oscillations (Power Oscillation Damping or POD). In proposed POD (PODC), each VSC station compares average frequencies measured at AC connection points...

This paper proposes a set of algorithms for stator parameter online estimation (stator resistance, inductance, and leakage inductance) an induction motor using neither the rotor speed nor resistance. The procedure is only based on current voltage measurements. algorithm performance tested simulation experimental data from commercial 15 kW motor.

This paper presents a comprehensive control strategy for unified power quality conditioners (UPQCs) to compensate both voltage and current problems. The controllers the series shunt components of UPQC are, equally, divided into three blocks: ① main controller, which deals with fundamental-frequency issues such as active reactive flow; ② harmonic ensures zero-error tracking while compensating harmonics; ③ set-point generation block, handles different objectives UPQC. controller design...

This paper proposes a set of algorithms for stator parameter on-line estimation (stator resistance, inductance and leakage inductance) an induction motor using neither the rotor speed nor resistance. The procedure is only based on current voltage measurements. algorithm performance tested simulation experimental data from commercial 15 kW motor.

Grid-forming voltage source converter (GF-VSC) has been identified as the key technology for operation of future converter-dominated power systems. Among many other issues, transient stability these types systems remains an open topic research because it is still a limiting factor stressed Previous studies have proposed control strategies GF-VSCs to improve this type by suitable current-limitation algorithms and/or active-power injections. As alternative, paper proposes two fast boosters...

The presence of an unbalanced voltage at the point common coupling (PCC) results in appearance a negative sequence current component that deteriorates control performance. Static synchronous compensators (STATCOMs) are well-known to be power application capable carrying out regulation PCC distribution lines can suffer from grid disturbances. This article proposes novel controller reference frame compensate by means STATCOM, allowing independent both positive and sequences. Several works have...