[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.6113/TKPE.2021.26.5.342

A Study on the DC-Link Miniaturization and the Reduction of Output Current Distortion Rate by Reducing the Effect of 120 Hz Ripple Voltage on Photovoltaic Systems

Song, Min-Geun (School of Electronic & Electrical Engineering, Hankyong National University)
Lee, Woo-Cheol (School of Electronic & Electrical Engineering, Institute for Information Technology Convergence, Hankyong National University)

Publication Information

The Transactions of the Korean Institute of Power Electronics / v.26, no.5, 2021 , pp. 342-348 More about this Journal

Abstract

The PV module of solar power systems requires maximum power point tracking (MPPT) technique because the power-voltage and current-voltage characteristics vary depending on the surrounding environment. In addition, the 120 Hz ripple voltage on the DC-Link is caused by the imbalance of the system voltage and current. The effect of this 120 Hz ripple voltage reduces the efficiency of the power generation system by increasing the output current distortion rate. Increasing the capacity of DC-Link can reduce the 120 Hz ripple voltage, but this method is inefficient in price and size. We propose a technique that detects 120 Hz ripple voltage and reduces the effect of ripple voltage without increasing the DC-Link capacity through a controller. The proposed technique was verified through simulations and experiments using a 1 kW single-phase solar power system. In addition, the proposed technique's feasibility was demonstrated by reducing the distortion rate of the output current.

Keywords

Photovoltaic system; 120 Hz ripple voltage; DC-Link capacitor; Current distortion;

Citations & Related Records

Reference

1	J. H. Vardhana and B. K. Naick, "Optimization of PV MPPT performance and DC link Voltage ripples compensation using a duty cycle modifier," IEEE International Conference on Recent Advances and Innovations in Engineering, Jaipur, India, May 2014.
2	M. Boztepe, F. Guinjoan, G. Velasco-Quesada, S. Silvestre, A. Chouder, and E. Karatepe, "Global MPPT scheme for photovoltaic string inverters based on restricted voltage window search algorithm," IEEE Transactions on Industry Electronics, Vol. 61, No. 7, pp. 3302-3312, Jul. 2014. DOI
3	Y. Shi, L. Liu, and H. Li, "A single-phase grid-connected PV converter with minimal DC-link capacitor and low-frequency ripple-free maximum power point tracking," in IEEE Energy Conversion Congress and Exposition, pp. 2385-2390, Sep. 2013.
4	B. Gu and K. Nam, "A DC link capacitor minimization method through direct capacitor current control," IEEE Transactions on Industry Electronics, Vol. 42, No. 2, pp. 573-581, Mar. 2006. DOI
5	F. Blaabjerg and D. O. Neacsu, "Adaptive SVM to compensate DC-link voltage ripple for four-switch three-phase voltage-source inverters," IEEE Transactions on Power Electronics, pp. 743-752, Jul. 1999.
6	A. Al-Diab and C. Sourkounis, "Variable step size P&O MPPT algorithm for PV systems," in IEEE Optimization of Electrical and Electronic, pp. 1097-1102, May. 2010.
7	Y. Wang and Y. Li "High-accuracy and fast-speed MPPT methods for PV string under partially shaded conditions," IEEE Transactions on Industry Electronics, Vol. 63, No. 1, pp. 235-245, Sep. 2016.
8	W. Sim, J. Jo, Y. Kim, and H. Cha, "Reactive power control of single-phase reactive power compensator for distribution line," The Transactions of the Korea Institute of Power Electronics, Vol. 25, No. 2, pp. 73-78, Apr. 2020. DOI
9	J. Jung, S. K. Lim, and K. Nam, "A feedback linearizing control scheme for a PWM converter-inverter having a very small DC-link capacitor," IEEE Transactions on Industry Electronics, Vol. 35, No. 5, pp. 1124-1131, Sep. 1999. DOI
10	J. M. Seo and W. C. Lee, "A study on bidirectional cou pled-inductor interleaved DC-DC converter for battery charging and discharging system," in Annual Conference of the KIPE, pp. 133-135, Jul. 2019.
11	M. G. Villalva and E. Ruppert, "Analysis and simulation of the P&O MPPT algorithm using a linearized PV array model," in IEEE Industrial Electronics, pp. 231-236, Nov. 2009.