Volume 20, Issue 4 (JIAEEE Vol.20 No.4 2023)                   Journal of Iranian Association of Electrical and Electronics Engineers 2023, 20(4): 15-22 | Back to browse issues page

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yari alghar S, jalilian A, shamsi nejad M A. Improvement of hybrid grid-connected inverter control scheme with active power injection and power quality improvement in order to operate in weak grid conditions. Journal of Iranian Association of Electrical and Electronics Engineers 2023; 20 (4) :15-22
URL: http://jiaeee.com/article-1-1436-en.html
Improvement of hybrid grid-connected inverter control scheme with active power injection and power quality improvement in order to operate in weak grid conditions
Sajjad Yari alghar , Alireza Jalilian * , Mohamad ali Shamsi nejad
Iran University of Science and Technology
Abstract:   (1612 Views)
In this paper, the operation of hybrid grid-connected inverter has been improved by changing the control scheme. Hybrid grid-connected inverter -HGCI-, which injects active power and compensates power quality problems, needs low DC link voltage because of thyristor-controlled LC filter in the output branch. This structure uses instantaneous reactive power theory which doesn’t perform well in distorted grid voltage condition. Hence, in these conditions, HGCI can’t inject active power and improve power quality. In this paper, Recursive digital filter method is used to improve HGCI in a way that operates in weak grid voltage. Instantaneous reactive power theory and recursive digital filter are both simulated in MATLAB/SIMULINK and the results are presented. Simulation results prove the satisfactory operation of HGCI in weak grid conditions.
Keywords: grid-connected inverter, power quality improvement, Instantaneous reactive power theory, recursive digital filter, DC link voltage, weak grid voltage
Full-Text [PDF 1561 kb]   (1329 Downloads)    
Type of Article: Research | Subject: Power
Received: 2022/02/8 | Accepted: 2022/12/24 | Published: 2023/08/7
Extended Abstract [PDF 493 KB]  (46 Download)
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