Stable V/f control system with unity power factor for PMSM drives

2012 ◽  
Author(s):  
Gheorghe-Daniel Andreescu ◽  
Cristina-Elena Coman ◽  
Ana Moldovan ◽  
Ion Boldea
Keyword(s):  
Control System ◽  
Power Factor ◽  
Unity Power Factor

scholarly journals Phase Voltage-Oriented Control of a PMSG Wind Generator for Unity Power Factor Correction

Energies ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5693
Author(s):  
Ming-Fa Tsai ◽  
Chung-Shi Tseng ◽  
Bor-Yuh Lin
Keyword(s):  
Control System ◽  
Power Factor ◽  
Power Factor Correction ◽  
Pi Controller ◽  
Control Loop ◽  
Phase Voltage ◽  
Unity Power Factor ◽  
Pass Filter ◽  
Wind Generator ◽  
Three Phase

This paper presents the power factor control of a permanent magnet synchronous wind generator (PMSG) wind turbine using a phase voltage-oriented control (PVOC) scheme, which is different from the conventional rotor flux-oriented control (RFOC) method and without using a rotor position sensor or sensorless estimator. The proposed control system is operated in two separately synchronously rotating d-q frames. One is for a phase-locked loop (PLL) and the other is for the PVOC current control loop. A PI controller functioned as a low-pass filter in the PLL loop is designed for extracting the phase voltage angle for the coordinate transformation between the stationary α-β frame and the synchronously rotating d-q frame in the PVOC control loop. The d-q modeling of the PMSG with the three-phase voltage vector aligned on the d-axis is then derived and based on which an another PI controller followed by decoupling control is designed, so that the three-phase currents are in phase with the three-phase output voltages of the wind generator for unity power factor correction. The simulation results in PSIM show the performance of the proposed control system which is also experimentally verified by using a TI TMS320F28335 digital control chip.

Study of Hoist Control System Based on Dual Three-Level Inverter

2014 ◽  
Vol 577 ◽  
pp. 368-371
Author(s):  
Feng Wang ◽  
Shu Yun Qiao ◽  
Xu Long Zhang
Keyword(s):  
Control System ◽  
Power Factor ◽  
Control Method ◽  
Dynamic Performance ◽  
Power Saving ◽  
Power Converter ◽  
Unity Power Factor ◽  
Energy Flows ◽  
Stator Flux ◽  
Grid Side

The double-fed control strategy for AC hoist motor is discussed in this paper. The AC/DC/AC power converter is adopted as main circuit. Three-phase neutral-point-clamped three-level rectifier is used as AC/DC link to realize unity power factor at grid-side, which reduces harmonic distortions. For the DC/AC inverter, three-level topology is used, which is controlled by stator-flux oriented vector control method. Meanwhile, energy flows in bidirectional way by back to back three-level power converter. The hoist motor control system obtains a high dynamic performance when stator side operating in unity power factor condition. The reliability and safety of hoist system is improved based on double PLC. The control system mentioned in this paper is being used to control a shaft hoist with a capacity of 260kW, and the power saving is remarkable.

scholarly journals Hybrid Reference Current Generation Theory for Solar Fed UPFC System

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1527
Author(s):  
R. Senthil Kumar ◽  
K. Mohana Sundaram ◽  
K. S. Tamilselvan
Keyword(s):  
Neural Network ◽  
Power Factor ◽  
Reactive Power ◽  
Voltage Source ◽  
Unity Power Factor ◽  
Current Generation ◽  
Load Voltage ◽  
Reference Current Generation ◽  
Source Current

The extensive usage of power electronic components creates harmonics in the voltage and current, because of which, the quality of delivered power gets affected. Therefore, it is essential to improve the quality of power, as we reveal in this paper. The problems of load voltage, source current, and power factors are mitigated by utilizing the unified power flow controller (UPFC), in which a combination of series and shunt converters are combined through a DC-link capacitor. To retain the link voltage and to maximize the delivered power, a PV module is introduced with a high gain converter, named the switched clamped diode boost (SCDB) converter, in which the grey wolf optimization (GWO) algorithm is instigated for tracking the maximum power. To retain the link-voltage of the capacitor, the artificial neural network (ANN) is implemented. A proper control of UPFC is highly essential, which is achieved by the reference current generation with the aid of a hybrid algorithm. A genetic algorithm, hybridized with the radial basis function neural network (RBFNN), is utilized for the generation of a switching sequence, and the generated pulse has been given to both the series and shunt converters through the PWM generator. Thus, the source current and load voltage harmonics are mitigated with reactive power compensation, which results in attaining a unity power factor. The projected methodology is simulated by MATLAB and it is perceived that the total harmonic distortion (THD) of 0.84% is attained, with almost a unity power factor, and this is validated with FPGA Spartan 6E hardware.

scholarly journals One Cycle Control of a PWM Rectifier a New Approach

Energies ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 5523
Author(s):  
Rodrigo De A. Teixeira ◽  
Werbet L. A. Silva ◽  
Guilherme A. P. De C. A. Pessoa ◽  
Joao T. Carvalho Neto ◽  
Elmer R. L. Villarreal ◽  
...  
Keyword(s):  
Power Factor ◽  
Digital Signal Processor ◽  
Digital Signal ◽  
Pwm Rectifier ◽  
Phase Voltage ◽  
Unity Power Factor ◽  
New Approach ◽  
Phase Current ◽  
Common Mode Voltage ◽  
Power Factor Corrector

This paper analyzes a Digital Signal Processor (DSP) based One Cycle Control (OCC) strategy for a Power Factor Corrector (PFC) rectifier with Common-mode Voltage (CMV) immunity. It is proposed a strategy that utilizes an emulated-resistance-controller in closed-loop configuration to set the dc-link voltage to achieve unity power factor (UPF). It is shown that if the PFC can achieve UPF condition and if the phase voltage is only affected by CMV, then phase current is free from CMV, as well as a lead-lag compensator (LLC) to average phase current.

One-cycle control for three-phase single-capacitor Z- source inverter with unity power factor

2016 ◽  
Vol 104 (4) ◽  
pp. 635-658 ◽  
Author(s):  
Lei Pan ◽  
Beibei Wang ◽  
Mei Li ◽  
Yi Pang ◽  
Zhao Yang ◽  
...  
Keyword(s):  
Power Factor ◽  
Unity Power Factor ◽  
Three Phase
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