Joon Young Park, Jiook Sin, Yeongsu Bak, Sung-Min Park, and Kyo-Beum Lee, "Common-mode Voltage Reduction for Inverters Connected in Parallel Using and MPC Method with Subdivided Voltage Vectors," Journal of Electrical Engineering & Technology, vol. 13, no > Paper

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Paper

International Journals Joon Young Park, Jiook Sin, Yeongsu Bak, Sung-Min Park, and Kyo-Beum Lee, "Common-mode Voltage Reduction for Inverters Connected in Parallel Using and MPC Method with Subdivided Voltage Vectors," Journal of Electrical Engineering & Technology, vol. 13, no. 3, pp. 1212–1222, May 2018. -SCIE

2018

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This paper presents a model predictive control (MPC) method to reduce the common-mode voltage (CMV) for inverters connected

in parallel, which increase the capacity of energy storage systems (ESSs). The proposed method is based on subdivided voltage

vectors, and the resulting algorithm can be applied to control the inverters. Furthermore, we use more voltage vectors than the

conventional MPC algorithm; consequently, the quality of grid currents is improved. Several methods were proposed in order to

reduce the CMV appearing during operation and its adverse effects. However, those methods have shown to increase the total

harmonic distortion of the grid currents. Our method, however, aims to both avoid this drawback and effectively reduce the CMV.

By employing phase difference in the carrier signals to control each inverter, we successfully reduced the CMV for inverters connected

in parallel, thus outperforming similar methods. In fact, the validity of the proposed method was verified by simulations and

experimental results.  

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