Accurate Assessment of Harmonic and Interharmonic Currents Generated by VSI-Fed Drives Under Unbalanced Supply Voltages

Chang, G.W.; Chen, Shin-Kuan; Su, H. J.; Wang, Ping-Kuei

doi:10.1109/tpwrd.2010.2089473

Cited by 37 publications

(23 citation statements)

References 15 publications

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“…The problem of modeling waveform distortions due to PWM ASD has been studied extensively and reported in the relevant literature [5][6][7][8][9]. In particular, in [6], it was shown that ASDs based on double-stage conversion systems generate interharmonic current components in the supply system side, DC link, and output side, in addition to harmonics that are typical for single-stage converters.…”

Section: Ac Supply Side Spectral Component Frequenciesmentioning

confidence: 99%

“…In [7], the authors presented an analytical approach for characterizing harmonic and interharmonic currents generated by ASDs under ideal supply conditions. Recently, reference [8] extended the previous work [7] by developing an efficient and accurate approach for characterising both harmonic and interharmonic currents when the ASDs were operated under unbalanced supply conditions. Finally, reference [9] presented simulation results by using MATLAB/Simulink for the assessment of harmonic and interharmonic currents generated by the ASDs in which the commutation effects caused by source impedance and non-ideal supply voltages were included.…”

Section: Introductionmentioning

confidence: 98%

“…In particular, it has been shown that the currents injected by ASDs at the point of common coupling (PCC) cause complex waveform distortions in supply-side waveforms that can be characterised by several harmonic and interharmonic spectral components [5][6][7][8][9]. For example, in [5], an analytical modelling for harmonic analysis of three-phase voltage source converters was proposed.…”

Section: Introductionmentioning

confidence: 99%

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A new advanced method for assessment of waveform distortions caused by adjustable speed drives

Bracale

Caramia

Tricoli

et al. 2011

2011 IEEE Industry Applications Society Annual Meeting

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In the technical literature many models capable of representing the behavior of the induction machine have been presented. The traditional Park model is very easy to be implemented but it does not take into account the flux density space harmonics. It is well known that it can be modified in order to consider stator and rotor asymmetries. However for some applications such as the study and the development of diagnostic techniques the results are not accurate enough. More detailed models have been presented; many of them are based on the winding function approach. They are suitable to represent the behavior of the machine under faulty conditions, since they take into account the effect of the eccentricity, the bar skewing, the magnetic saturation and the electrical asymmetries. All of them are very complex and their employment implies a huge computational burden. In this paper the authors propose a new accurate model based on the winding functions which is capable of representing any kind of stator and rotor asymmetry; air gap eccentricity and magnetic saturation have been neglected. Under these hypotheses it will be shown how all of the inductances can be calculated analytically: this dramatically reduces the requirements in terms of computational power. Some numerical results obtained with the presented model will be shown

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Section: Ac Supply Side Spectral Component Frequenciesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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A new advanced method for assessment of waveform distortions caused by adjustable speed drives

Bracale

Caramia

Tricoli

et al. 2011

2011 IEEE Industry Applications Society Annual Meeting

View full text Add to dashboard Cite

show abstract

“…(iv) Iterative harmonic analysis is unable to model non-linear load. For the above reasons, the research work in interharmonics measurement is still on the way [25][26][27][28][29][30][31][32][33][34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Development of leakage energy allocation approach for time‐varying interharmonics tracking

Lin¹

2015

IET Generation, Transmission & Distribution

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Recently, an increasing use of power electronic facilities in industry has produced considerable harmonics and interharmonics in power systems. The power supply quality is therefore seriously threatened. The discrete Fourier transform (DFT) is currently the most important tool in signal analysis. However, a misapplication of DFT may result in incorrect outcome because of some inherent limitations such as spectral leakage or aliasing effect etc. The existing interharmonics even raise more difficulty in signal analysis than harmonics. To overcome this dilemma, this study develops a strategy of leakage energy allocation method for both stationary and non-stationary interharmonics identification. The proposed algorithm can regain its original interharmonics amplitude by restoring all spilled leakage energy, and also finds its individual frequency component according to the distribution of spilled leakage energy. The performance effectiveness of the proposed approach is verified using the numerical examples in terms of reliability, rapid response and high-precision performance.

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“…In spite of all these advantages, VSD are mainly affected by interharmonics. The appearance of interharmonics in the drive is due to the current imbalance or the overmodulation of the inverter is given in [1][2][3][4][5][6][7]. The main cause for the appearance of interharmonics in ACIDC/ AC system is that the two AC systems are not properly decoupled by the DC link and all loads not pulsating synchronously with the system frequency.…”

Section: Introductionmentioning

confidence: 99%

Analysis of interharmonics in conventional and matrix converter fed adjustable speed drives

Geethalakshmi

Babu

Santhoshma³

2012

2012 IEEE 5th India International Conference on Power Electronics (IICPE)

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This paper deals with the interharmonics appearing in the adjustable speed drives. The theoretical analysis of interharmonics frequency in the drive is performed. The methods to eliminate the interharmonics are also discussed. The interharmonics appearing in the conventional ACfDC/AC converter and new method with matrix converter employed in the variable speed drives are analyzed. And the interharmonics values appearing in both the methods are compared.

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Accurate Assessment of Harmonic and Interharmonic Currents Generated by VSI-Fed Drives Under Unbalanced Supply Voltages

Cited by 37 publications

References 15 publications

A new advanced method for assessment of waveform distortions caused by adjustable speed drives

A new advanced method for assessment of waveform distortions caused by adjustable speed drives

Development of leakage energy allocation approach for time‐varying interharmonics tracking

Analysis of interharmonics in conventional and matrix converter fed adjustable speed drives

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