2018
DOI: 10.1109/tpel.2017.2665483
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Abstract: Capacitor-voltage feedforward with full delay compensation to improve weak grids adaptability of LCL-filtered grid-connected converters for distributed generation systems. IEEE Transactions on Power Electronics, 33(1), 749-764.

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Cited by 129 publications
(74 citation statements)
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References 41 publications
(64 reference statements)
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“…Thus the output of SOGI-FLL can achieve a lead phase compared to the input signal, effectively compensating control and measurement delays. Similarly, the closed-loop structure for implementing the delay compensation is also adopted in the repetitive predictor [26], [31], which includes a delay term in the feedback path and has an infinite-gain controller.…”
Section: B Modified Sogi-fll With the Delay Compensationmentioning
confidence: 99%
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“…Thus the output of SOGI-FLL can achieve a lead phase compared to the input signal, effectively compensating control and measurement delays. Similarly, the closed-loop structure for implementing the delay compensation is also adopted in the repetitive predictor [26], [31], which includes a delay term in the feedback path and has an infinite-gain controller.…”
Section: B Modified Sogi-fll With the Delay Compensationmentioning
confidence: 99%
“…control and measurement delays) in the digital-control system can seriously deteriorate the performance of converters, numerous researches have been reported in the compensation of delays. Various delay-compensation methods have been proposed for enhancing the damping ability of LCL filters [26], [27], improving the stability and dynamic performance of converters [28]- [30], suppressing output current harmonics [31]- [33], etc. The linear prediction is implemented by the iteration algorithm using consecutive history samples [28].…”
Section: Introductionmentioning
confidence: 99%
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“…For DPGSs, especially megawatt-level systems, it is relatively difficult to measure the PCC voltage to realize grid synchronization, due to the following reasons [24]: (1) the isolation transformer may be geographically far from the grid-connected converter; (2) in medium-or high-voltage applications, the PCC voltage is comparatively high, leading to a situation where the signal conditioning circuit can be quite complex and expensive; and (3) the grid side inductance of the LCL filter might be replaced by the leakage inductance of the isolation transformer to reduce the volume and cost, as in the system described in this paper. Therefore, as applied in [13,24,25], filter capacitor voltage U c is used as the input voltage of DDSRF-PLL. Moreover, a weak grid can be denoted by the Thevenin equivalent circuit, in which an ideal grid voltage U g is in series with the grid impedance L g .…”
Section: Generation and Suppression Mechanism Analysis Of Start-up Inmentioning
confidence: 99%
“…Therefore, if this disturbance can be offset, the inrush current can be fundamentally suppressed. However, it is relatively difficult to measure the grid voltage or PCC voltage [24] as in the previous analysis, and therefore the filter capacitor voltage feedforward can be used to suppress the inrush current, since it is linear with the PCC voltage [13].…”
Section: Suppression Mechanism Analysis Of the Start-up Inrush Currentmentioning
confidence: 99%