Double input Z-source inverter applicable in dual-star PMSG based wind turbine |
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| Affiliation: | 1. HIWING Power Supply Station of China Aerospace Science and Industry Corporation (CASIC), 7 Yungang West Road, Fengtai District, Beijing 100074, China;2. State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China;3. Beijing Engineering Research Center for Watershed Environmental Restoration & Integrated Ecological Regulation, School of Environment, Beijing Normal University, Beijing 100875, China;4. College of Water Resources & Civil Engineering, China Agricultural University, Beijing 100083, China;1. Nanyang Technological University, Singapore 639798, Singapore;2. Northeastern University, Boston, MA 02215, USA;3. DNV GL, Singapore;1. School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, China;2. The National Key Laboratory for Vessel Integrated Power System Technology Dept., Naval University of Engineering, Wuhan, Hubei, China |
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| Abstract: | This paper proposes a new double-input Z-network for application in wind energy conversion system (WECS) which is composed of two same DC voltage sources as input sources, two inductors and one capacitor. As a result, the presented structure requires less capacitor number compared to traditional Z-network and it will be able to deliverer energy of both DC sources to local load or grid. The proposed inverter is applicable in dual-star PMSG based WECS, since it requires two DC voltage sources in same value. Besides, dynamic modeling of dual-star PMSG is presented to analyze proposed WECS connected to grid which employs dual-star PMSG and double-input Z-source inverter. The proposed dual-input Z-source inverter controls maximum power point tracking (MPPT) and delivering power to the grid. Therefore, other DC–DC chopper is not required to control two sets of rectified output voltage of generator in view of MPPT. As a result, the proposed topology requires less power electronic switches and the suggested system is more reliable against short circuit. The ability of proposed WECS with dual-star PMSG and double-input Z-source inverter is validated with simulation results and experimental tests using PCI-1716 data acquisition system. |
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| Keywords: | Permanent magnet synchronous generator Dual-star Double-input Z-source inverter |
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