Design and Implementation of Sensorless Voltage Control of Front-End Rectifier for Power Quality Improvement in Telecom System

P, Saravana Prakash; Kalpana, R; Singh, Bhim; Bhuvaneswari, G.

doi:10.1109/tia.2018.2790949

Cited by 35 publications

(15 citation statements)

References 32 publications

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“…Up to 40-pulse AC-DC converters have been addressed in Paice and Singh et al 4,5 presenting different applications of multi-pulse technique, but the proposed schemes lead to violation of IEEE 519 6 and MIL STD 1399 requirements (ie, 3% for the input current total harmonic distortion [THD]). Various configurations have been reported for 12,18,20,24, and 30-pulse converters, [7][8][9][10][11] and the experimental results have been obtained to support presented ideas. Using active auxiliary circuit is also a typical harmonic reduction method at DC link.…”

Section: Introductionmentioning

confidence: 69%

“…In Tse and Adams, Suzdalenko and Chub, and Prakash et al, [22][23][24] the power-factor correction switched-mode power supply is proposed. The comparative evaluation of modulation methods and its advantages have been investigated in Prakash et al 24 Higher device stress, low-frequency distortion, difficulties in neutral point balancing, less efficient utilization of DC-link voltage, increased control complexity and cost, and limited dynamic performance during transients/low PF are the associated drawbacks of the existing control techniques. Also, the proposed configuration is economical than Prakash et al 24 because Prakash et al 24 requires an active switch and a driver circuit which increases the control complexity and cost.…”

Section: Introductionmentioning

confidence: 99%

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Cost‐effective multi‐pulse AC‐DC converter with lower than 3% current THD

Abdollahi

Gharehpetian

Mahdavi

2019

Circuit Theory & Apps

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In this paper, a new multi-pulse clean power converter topology is presented with lower than 3% input current total harmonic distortion (THD). The topology is based on the combination of a 36-pulse converter and a pulse doubling circuit. The 36-pulse converter consists of a "polygon" autotransformer and two 18-pulse diode bridge rectifiers. Pulse doubling circuit consists of zerosequence-blocking transformer (ZSBT) and tapped interphase transformer (IPT). The important advantage of the proposed AC-DC converter is considerable reduction in burdens of the magnetic parts with respect to the nominal load rating. It provides more economical solution to achieve harmonic mitigation in electric power systems as compared with other 72-pulse AC-DC converters. The simulation and experimental results show that the input current THD is less than 3% using the proposed topology. The results indicate a significant reduction in the total cost and volume of the proposed 72-pulse configuration in comparison with similar configurations. Also, it is shown that the proposed converter rating is about 44% of the DC load power.

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Section: Introductionmentioning

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Cost‐effective multi‐pulse AC‐DC converter with lower than 3% current THD

Abdollahi

Gharehpetian

Mahdavi

2019

Circuit Theory & Apps

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“…In recent years, grid-connected controlled rectifiers, also called active front end (AFE) have been widely used in motor drives [1], renewable energy sources [2,3], DC microgrids [4], etc. AFE can not only improve the power factor, but also is robust against the fluctuations of the grid, with excellent dynamic characteristics [5].…”

Section: Introductionmentioning

confidence: 99%

Integral Sliding-Mode Control-Based Direct Power Control for Three-Level NPC Converters

et al. 2020

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Three-level neutral-point-clamped (NPC) converter is widely used in energy conversion systems due to its good properties for high-power systems presenting output waveforms with reduced harmonic distortion. To obtain better system performance, an integral sliding-mode control (ISMC)-based direct power control (DPC) strategy is proposed for NPC converters. The controller achieves three objectives. First, an extended state observer (ESO)-based ISMC strategy, to enforce the active and reactive power to their reference values, is applied in the power tracking loop. ESO is used to reduce the influence of parameter uncertainties. Next, in the voltage regulation loop, a radial basis function neural network (RBFNN)-based adaptive ISMC strategy is applied to regulate the DC-link voltage. RBFNN is used to estimate the load variation, which is considered as a disturbance, to improve the system disturbance rejection ability. An adaptive law is used in the controller to reduce the chattering of reference active power which can reduce the current harmonic distortion. Finally, a proportional-integral (PI) control strategy is applied in the voltage balancing loop to achieve voltage balance between two DC-link capacitors. Experimental results show the effectiveness and superiority of the proposed control strategy for the NPC power converter compared with PI-based DPC strategy.

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“…However, in order to maintain the neutral-point voltage balance, an additional neutral-point voltage control loop needs to be introduced. To reduce the cost, sensorless voltage control and sensorless current control schemes are successively introduced [13]- [16]. However, dynamic response and robustness will degrade to some extent, and over voltage/current protection will no longer exist.…”

Section: Introductionmentioning

confidence: 99%

Model Predictive Virtual-Flux Control of Three-Phase Vienna Rectifier Without Voltage Sensors

Liu

Zhang

et al. 2019

IEEE Access

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In this paper, a finite-control-set model predictive virtual-flux control (FCS-MPVFC) for a three-phase Vienna rectifier is developed and implemented to achieve voltage sensorless control, which is very robust to distorted grid-side voltage operation. Firstly, by investigating the relationship between virtual-fluxes aroused from grid-side voltages and line voltages in d-q frame, the control object is directly associated with virtual-flux tracking error minimization. Secondly, the reference line virtual-flux is calculated based on the controllability of active/reactive power associated with the delay compensation and load angle. Thirdly, to enhance the steady-state performance, switching sequence rather than single switching vector is utilized during one sampling period. Furthermore, a redundant vector pre-selection is adopted to balance the neutral-point voltage. The proposed strategy is compared with the traditional finite-control-set model predictive current control (FCS-MPCC) method. Both simulated and experimental results verify the effectiveness of the proposed control algorithm. INDEX TERMS Finite-control-set model predictive virtual-flux control, Vienna rectifier, voltage sensorless control, distorted, switching sequence, pre-selection. II. SYSTEM DESCRIPTION OF THREE-PHASE VIENNA RECTIFIER

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Design and Implementation of Sensorless Voltage Control of Front-End Rectifier for Power Quality Improvement in Telecom System

Cited by 35 publications

References 32 publications

Cost‐effective multi‐pulse AC‐DC converter with lower than 3% current THD

Cost‐effective multi‐pulse AC‐DC converter with lower than 3% current THD

Integral Sliding-Mode Control-Based Direct Power Control for Three-Level NPC Converters

Model Predictive Virtual-Flux Control of Three-Phase Vienna Rectifier Without Voltage Sensors

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