A Bidirectional Single-Stage DC/AC Converter for Grid Connected Energy Storage Systems

다국어 초록 (Multilingual Abstract)

In this paper, a unified control strategy using the current space vector modulation (CSVM) technique is proposed and applied to a bidirectional three-phase DC/AC converter. The operation of the converter changes with the direction of the power flow. In the charging mode, it works as a buck type rectifier; and during the discharging mode, it operates as a boost type inverter, which makes it suitable as an interface between high voltage AC grids and low voltage energy storage devices. This topology has the following advantages: high conversion efficiency, high power factor at the grid side, tight control of the charging current and fast transition between the charging and discharging modes. The operating principle of the mode analysis, the gate signal generation, the general control strategy and the transition from a constant current (CC) to a constant voltage (CV) in the charging mode are discussed. The proposed control strategy has been validated by simulations and experimental results obtained with a 1kW laboratory prototype using supercapacitors as an energy storage device.

목차 (Table of Contents)

• Abstract
• I. INTRODUCTION
• II. CIRCUIT TOPOLOGY AND MODE ANALYSIS
• III. CONTROL STRATEGY
• IV. SIMULATION VERIFICATION
• V. EXPERIMENTAL VERIFICATION
• VI. CONCLUSIONS
• REFERENCES

참고문헌 (Reference)

1 Y. Chen, "Three-phase boost-type grid-connected inverter" 23 (23): 2301-2309, 2008

2 C. Y. Inaba, "Three phase voltage source soft switching inverter with high frequency pulse current transformers" 2 (2): 288-296, 2002

3 B.-Y. Chen, "New digital-controlled technique for battery charger with constant current and voltage control without current feedback" 59 (59): 1545-, 2012

4 장두희, "Low Cost High Power Density Photovoltaic Power Conditioning System with an Energy Storage System" 전력전자학회 12 (12): 487-494, 2012

5 Y.-S. Lee, "Fuzzy-controlled individual-cell equaliser using discontinuous inductor current-mode Cuk convertor for lithium-ion chemistries" 152 (152): 1271-1282, 2005

6 P. A. Cassani, "Design, testing, and validation of a simplified control scheme for a novel plug-in hybrid electric vehicle battery cell equalizer" 57 (57): 3956-3962, 2010

7 X. H. Wu, "Design of a plug-in repetitive control scheme for eliminating supply-side current harmonics of three-phase PWM boost rectifiers under generalized supply voltage conditions" 25 (25): 1800-1810, 2010

8 Seyed Mohammad Dehghan, "Current-Type Nine-Switch Inverters" 전력전자학회 10 (10): 146-154, 2010

9 D. Sha, "Control strategy for input-series-output-series high-frequency AC-link inverters" 28 (28): 5283-5292, 2013

10 Y. Zhang, "Comparison of traditional two-stage buck-boost voltage source inverter and diode-assisted buck-boost voltage source inverter" 141-, 2012

11 한상협, "Bi-Directional Multi-Level Converter for an Energy Storage System" 전력전자학회 14 (14): 499-506, 2014

12 B. Mirafzal, "An SVPWM-Based switching pattern for stand-alone and grid-connected three-phase single-stage boost inverters" 26 (26): 1102-1111, 2011

13 Z. Qin, "A three-phase boost-type grid-connected inverter based on synchronous reference frame control" 384-, 2012

14 B. Sahan, "A single-stage PV module integrated converter based on a low-power current-source inverter" 55 (55): 2602-2609, 2008

15 Byung-Duk Min, "A Novel Grid-Connected PV PCS with New High Efficiency Converter" 전력전자학회 8 (8): 309-316, 2008

16 Deshang Sha, "A Digitally Controlled Three-Phase Cycloconverter Type High Frequency AC Link Inverter Using Space Vector Modulation" 전력전자학회 11 (11): 28-36, 2011