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An Improved Hybrid Parallel Compensator for Enhancing PV Power Transfer Capability.

Authors :
Jiang, Fei
Peng, Xing
Tu, Chunming
Guo, Qi
Deng, Jie
Dai, Fengzhe
Source :
IEEE Transactions on Industrial Electronics. Nov2022, Vol. 69 Issue 11, p11132-11143. 12p.
Publication Year :
2022

Abstract

This article proposes an improved hybrid parallel compensator (IHPC) for enhancing the power transfer capability of a photovoltaic (PV) grid-connected inverter. A thyristor switched capacitor (TSC) module is used in series with a conventional inductive-coupling voltage source inverter to reduce the dc-link voltage. Under a low dc-link voltage, the voltage across the insulated gate bipolar transistor (IGBT) will also be low, which will reduce the voltage stress of the IGBT, thereby improving the reliability and reducing the loss of the voltage resource inverter. First, the mechanism of reactive compensation for improving the PV inverter power transmission capability is analyzed. Then, the circuit configuration and operating principle of the IHPC are introduced. After that, an optimal control strategy for the IHPC is proposed to address the resonance problem caused by the TSC connected in series with the L filter and to improve the compensation performance of the IHPC. Finally, the effectiveness of the proposed IHPC and the control method is validated by the simulation and experiments. The results show that the IHPC with optimal control strategy can achieve continuous reactive power compensation under a low dc-link voltage, thereby enhance PV power transfer capability. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
02780046
Volume :
69
Issue :
11
Database :
Academic Search Index
Journal :
IEEE Transactions on Industrial Electronics
Publication Type :
Academic Journal
Accession number :
157325387
Full Text :
https://doi.org/10.1109/TIE.2021.3121694