| Autor: |
Ravindran, Ramkumar, Sathiasamuel, Charles Raja, Ramasamy, Palanisamy, Balasubramanian, Karthik |
| Předmět: |
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| Zdroj: |
International Transactions on Electrical Energy Systems; Dec2021, Vol. 31 Issue 12, p1-18, 18p |
| Abstrakt: |
Summary: Hybrid energy sources are much needed to meet the power demand for various real‐time applications, and the desired output level is attained with the help of various advanced power converter topologies. Here, the hybrid energy source‐fed quasi‐Z‐source cascaded H‐bridge inverter (QZS‐CHI) is implemented for a grid‐connected system. The conventional multilevel inverter topologies are suitable for voltage buck operation, but this proposed system includes quasi‐Z‐source inverter network, which leads voltage buck‐boost operation without any additional dc‐dc converter. Modified space vector modulation (MSVM) technique is developed to control the QZS‐CHI system, which leads to reduced total harmonic distortion(THD), reduced common‐mode voltage (CMV), controlled output current, and improved output voltage. The proposed system QZS‐CHI is energized using a hybrid energy source with a photovoltaic (PV) system and wind energy conversion system (WECS). With the help of shoot through mode in QZS, the output voltage is boosted without an additional converter and CMV is minimized by the proper utilization of medium and small switching state vectors. To assess the proposed technique, a laboratory prototype model is built and analyzed under different cases. From the obtained results, it is observed that the proposed method reduces THD to 2.15% for output voltage and 2.99% for output current, and common‐mode voltage is reduced to Vdc/6 times of applied dc voltage. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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