A novel voltage sensorless DPC approach of AFE rectifier based on virtual flux and dynamic DC link reference design

Kumar, Amit; Srungavarapu, Gopalakrishna

doi:10.1109/indicon.2016.7838891

Cited by 6 publications

(6 citation statements)

References 17 publications

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“…From these results, it is clear that when the load across the DC‐link is increased, there is fall in DC‐link voltage and vice‐versa. The power quality performance of all the techniques are compared and a quantitative analysis is performed for finding out active and reactive power ripples based on standard deviation as discussed in [13, 21]. Line current THD is also compared for both the cases of increment and decrement of load conditions.…”

Section: Experimental Results and Its Discussionmentioning

confidence: 99%

“…The zero value of x p k, n and x q k, n corresponds to two zero vectors and the non-zero values corresponds to other six vectors. Ṗ avg and Q avg are normalised using (12), as shown in (13).…”

Section: Analysis Of Active and Reactive Power Flow By Quantisation Omentioning

confidence: 99%

“…These parameters are chosen based on the feasible values of voltages and available equipment in the laboratory. Table 4 shows the quantised and normalised values obtained by substituting the above data in (10)- (13). It can be observed from (12) and (13) that Ṗ n does not depend on load resistance but Q n depends on load resistance.…”

Section: Algorithm-based Dpcmentioning

confidence: 99%

“…In this, only two‐line side current sensors and one voltage sensor is used to control the DC‐link voltage. The active and reactive powers are estimated on the basis of virtual flux technique discussed in [8, 13]. The errors in the active and reactive powers are normalised and the proposed algorithm is used to generate pulses for the converter based on the sector information and normalised error in active and reactive powers.…”

Section: Algorithm‐based Dpcmentioning

confidence: 99%

“…In [8], a new switching table based on virtual flux is introduced and lesser THD in line current is achieved as compared to classical DPC. In literature [9][10][11][12][13], variants of switching tables for AFEs are discussed to enhance the performance but their formation methodology is not either discussed or properly presented. In [14], fuzzy logic-based switching state selection technique is presented to overcome the drawbacks of classical DPC technique.…”

Section: Introductionmentioning

confidence: 99%

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Algorithm‐based direct power control of active front‐end rectifiers

Kumar

Srungavarapu

2019

IET Power Electronics

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Switching Table-based Direct Power Control (ST-DPC) is one of the most widely used techniques in Active Front-End (AFE) rectifiers. Proper control of switching states of the power converter is essential to obtain better power quality performance and quicker response to the load demand. In the classical ST-DPC techniques such as Virtual Flux with Noguchi's Table-based DPC (VF-NT-DPC) and Virtual Flux with Improved Table-based DPC (VF-IT-DPC) etc., these switching states are decided based on a predefined static switching table. Hence, they have poor power quality and dynamic performance with load variations. In this research work, in-depth mathematical analysis is carried out based on the quantised values of 'the rate of change of active and reactive powers' and an algorithm is introduced for AFEs. Since, the proposed algorithm is considering the quantised values of 'the rate of change of active and reactive powers', which is dynamic in nature; therefore, it has reduced THD, lesser power ripple, and quicker response than classical ST-DPC techniques. To show the superiority of the Algorithm based DPC (A-DPC) technique experimental work is carried out and the power quality performance of the proposed A-DPC is compared with conventional ST-DPC techniques VF-NT-DPC and VF-IT-DPC.

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Section: Experimental Results and Its Discussionmentioning

confidence: 99%

Section: Analysis Of Active and Reactive Power Flow By Quantisation Omentioning

confidence: 99%