One cycle controlled grid‐tied differential boost inverter

Purnama, I Ketut Eddy; Chi, Pei-Chin; Hsieh, Yao‐Ching; Lin, Jing‐Yuan; Chiu, Huang‐Jen

doi:10.1049/iet-pel.2015.0611

Cited by 12 publications

(4 citation statements)

References 29 publications

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“…The VSC should be properly designed and controlled to achieve a high power quality on the grid cost-effectively. Given the power quality of the grid, VSCs are conventionally assumed to ensure flow of sinusoidal current at fundamental frequency [1][2][3][4][5][6][7][8][9] even if the grid voltage is distorted by harmonics. This method injects the least harmonic current without deteriorating grid harmonic pollution.…”

Section: Introductionmentioning

confidence: 99%

“…The conventional controllers for the VSC are investigated in terms of cost and effectiveness to implement the novel UPFR mode cost-effectively. The VSC is usually tied to the grid through an inductor [1][2][3][4][5][6][7][8][9], which current-to-voltage conversion (CVC) is proceeded by the controller for the purpose of voltage-oriented control (VOC). The conventional single-phase VSC controller has to generate two orthogonal sinusoidal component artificially [10], with amplitude proportional to the fundamental frequency grid voltage.…”

Section: Introductionmentioning

confidence: 99%

“…For quadrature component generation (QCG), except for the ACD-CDSC method and intact grid voltage, an extra QCG process is necessary for all of the aforementioned DCGs, and the reported QCGs include SOGI, filters, inverse Park transformation, Hilbert transformation, transport delay, orthogonal functions sin-cos, and zero-meanpower [10,[14][15][16][17][18][19]. Nonetheless, the first-order differentiator proposed for the grid-tie inductor CVC in [6] also produces a 90° phase shift [25], which is an essential property of QCG. Thus, catering to cost-effectiveness in this work, the differentiator can play the roles of the QCG and CVC.…”

Section: Introductionmentioning

confidence: 99%

“…Given the power quality of the grid, VSCs are conventionally assumed to ensure flow of sinusoidal current at fundamental frequency [1–9] even if the grid voltage is distorted by harmonics. This method injects the least harmonic current without deteriorating grid harmonic pollution.…”

Section: Introductionmentioning

confidence: 99%

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Simple four‐quadrant grid‐tie control scheme with unity power factor rectifier mode for single‐phase DC/AC converters

Chi

Purnama

Hsieh

et al. 2017

IET Renewable Power Generation

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This study proposes a voltage-oriented control scheme for four-quadrant grid-tie of a single-phase bidirectional direct current/alternating current (AC) voltage-sourced converter (VSC) to operate smartly at modes of unity power factor (PF) rectifier (UPFR), inverter or static var compensator. Given the possible harmonic-distorted AC grid voltage, the proposed scheme follows or filters the grid voltage to generate the appropriate current command template for minimising the harmonic current while synchronising with the grid. The following template is for the UPFR mode, whereas the filtered template is for the other modes. The scheme proposes a unique band-pass filter (BPF) to proceed with direct component generation for the filtered template. The proposed scheme further unifies the grid-tie inductor current-to-voltage conversion for the following emplate and the quadrature component generation for the filtered template into a differentiator. The control laws under the filtered and following templates are derived. The BPF and differentiator designs are introduced. Simulations and experiments are conducted with a one-cycle control full-bridge VSC to verify the proposed grid-tie control scheme and evaluate its performance. Nomenclature v grid AC grid voltage source R grid , L grid AC grid wire resistance, inductance v R grid , v L grid voltages across R grid , L grid i grid , i sgrid , i dgrid AC grid current, its assumed sinusoid, their difference i R , i sR , i dR rectifier mode input current, its assumed sinusoid, their difference i NL , i 1NL , i hNL non-linear load current, its fundamental, harmonic components g emulated conductance of UPFR mode v AC , V AC AC grid voltage vector on point of common coupling, its RMS value v out VSC AC output voltage vector v filter , v R f , v L f voltage across grid-tie filter, resistance, inducatnce of the filter k VSC AC voltage gain v 1 , V^1, V 1 VSC fundamental output voltage vector, its amplitude, RMS value θ 1 phase angle of v 1 * * , I 1 * * AC output voltage command for arm A, B of FB VSC v oA , v oB AC output voltage on arm A, B of FB VSC V oA , V oB average values of v oA , v oB f s , T s , d switching frequency, period, duty cycle over T s V DC DC grid voltage f c , ω c central frequency of the pass band of the BPF, its angular form f cL , ω cL corner frequency of the pass band of the low-pass filter, its angular form f cH , ω cH corner frequency of the pass band of the highpass filter, its angular form ζ L , ζ H damping ratio of low-pass, high-pass filters K L , K H gain in the pass band of low-pass, high-pass filters

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