Enhanced Sensorless Predictive Direct Power Control for PWM Rectifier with Constant Switching Frequency under Grid Disturbances

2021 ◽  
Author(s):  
Sarah Djabali ◽  
Abdelkarim Ammar ◽  
Aissa Kheldoun
Keyword(s):  
Power Control ◽  
Switching Frequency ◽  
Pwm Rectifier ◽  
Direct Power ◽  
Direct Power Control

Direct Power Controlled Three Phase Boost Type PWM Rectifier Based on Novel Switching Vector Table

2011 ◽  
Vol 308-310 ◽  
pp. 1269-1272
Author(s):  
Guang Ye Li ◽  
Jian Ru Wan ◽  
Ming Shui Li
Keyword(s):  
Power Control ◽  
Reactive Power ◽  
Active Power ◽  
Switching Frequency ◽  
Pwm Rectifier ◽  
Direct Power ◽  
Power Fluctuation ◽  
Direct Power Control ◽  
Voltage Vector ◽  
Three Phase

The reactive power is out of control near the fundamental voltage vector in traditional direct power control system, which leads to the current distortion at AC side and the voltage fluctuation at DC side. The mechanisms of the instantaneous active power and the reactive power are analyzed based on the instantaneous power mathematical model of the PWM rectifier. A new direct power control strategy is researched based on novel sector division and novel switching table. This method not only has the advantage of rapid regulation for active power, but also can restrain reactive power fluctuation and reduce switching frequency. Simulative and experimental results verify its feasibility and effectiveness.

scholarly journals Direct Power Control of Matrix Converter-Fed DFIG with Fixed Switching Frequency

2019 ◽  
Vol 11 (9) ◽  
pp. 2604 ◽  
Author(s):  
Arzhang Yousefi-Talouki ◽  
Shaghayegh Zalzar ◽  
Edris Pouresmaeil
Keyword(s):  
Power Control ◽  
Direct Torque Control ◽  
Matrix Converter ◽  
Torque Control ◽  
Switching Frequency ◽  
Direct Power ◽  
Direct Power Control ◽  
Reactive Component ◽  
Extensive Discussion ◽  
Induction Generators

In this paper, a direct power control (DPC) technique is proposed for matrix converter-fed grid-connected doubly fed induction generators (DFIGs). In contrast to what has been investigated in the past for direct torque control (DTC) or DPC of matrix converter-fed DFIGs, the active and reactive powers are regulated in a fixed switching frequency using indirect space vector modulation (ISVM) technique. Hence, designing input filters for matrix converters (MCs) becomes convenient. In addition, the reactive component of input side of MC is controlled which leads to reduction of distortion in grid current waveform. Also, an extensive discussion is addressed for nonlinear voltage errors of MC that may cause inaccurate power control. Simulation results done in MATLAB/Simulink show the effectiveness of the proposed method.

A Study on Modified Model Predictive DPC of Rectifiers

2013 ◽  
Vol 441 ◽  
pp. 328-331
Author(s):  
Hui Zhao ◽  
Biao Wang ◽  
Hong Jun Wang ◽  
You Jun Yue
Keyword(s):  
Power Control ◽  
Reactive Power ◽  
Operating Time ◽  
Sampling Period ◽  
Switching Frequency ◽  
Direct Power ◽  
Direct Power Control ◽  
Voltage Vector ◽  
Control Scheme ◽  
Result Show

In this paper, we study a modified predictive direct power control scheme (P-DPC).This scheme which based on model predictive control (MPC) uses a discrete rectifier model to infer the predictive direct power control theme again, and selects the operating time of voltage vector and voltage vector to realize fixed switching frequency through setting the minimum power errors of each sampling period. This control scheme has a lower switching frequency compared to MP-DPC; and it is still simple and clear implemented in the stationary reference frame directly, meanwhile, it does not need PI controllers or voltage-oriented controllers compared to other developed control schemes. We make simulations using MATLAB. The result show the excellence of this novel predictive direct power control scheme through improving the switching frequency, current THD and active power and reactive power quality compared to MP-DPC and LUT-DPC.

Artificial Neural Network for PWM Rectifier Direct Power Control and DC Voltage Control

2018 ◽  
pp. 286-316 ◽  
Author(s):  
Arezki Fekik ◽  
Hakim Denoun ◽  
Ahmad Taher Azar ◽  
Mustapha Zaouia ◽  
Nabil Benyahia ◽  
...  
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Power Control ◽  
Power Factor ◽  
Reactive Power ◽  
Pwm Rectifier ◽  
Direct Power ◽  
Direct Power Control ◽  
Dc Voltage ◽  
Unit Power

In this chapter, a new technique has been proposed for reducing the harmonic content of a three-phase PWM rectifier connected to the networks with a unit power factor and also providing decoupled control of the active and reactive instantaneous power. This technique called direct power control (DPC) is based on artificial neural network (ANN) controller, without line voltage sensors. The control technique is based on well-known direct torque control (DTC) ideas for the induction motor, which is applied to eliminate the harmonic of the line current and compensate for the reactive power. The main idea of this control is based on active and reactive power control loops. The DC voltage capacitor is regulated by the ANN controller to keep it constant and also provides a stable active power exchange. The simulation results are very satisfactory in the terms of stability and total harmonic distortion (THD) of the line current and the unit power factor.

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