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Control Method for Overvoltage Suppression Across the DC Capacitor in a Grid-Connection Converter Using Leg Short Circuit of Power mosfets during the Initial Charge.
- Source :
-
IEEE Transactions on Industry Applications . Jul-Aug2019, Vol. 55 Issue 4, p4012-4019. 8p. - Publication Year :
- 2019
-
Abstract
- This paper proposes a control method for the initial charge of the dc-capacitor in voltage-source power converters. The proposed method is suitable for the power converter equipped with a small dc capacitor and is capable of removing the initial charge circuit. The proposed method makes a leg short circuit by using power devices employed in the power converter, discharges the dc capacitor, and suppresses its overvoltage due to the initial charge. The short-circuit operation only occurs for a short time and is used once in each leg to distribute the loss to each power device. The experimental verification using a 200-V, 5-kVA three-phase converter shows that the proposed method can reduce the peak voltage of the dc capacitor from 520 to 420 V. The experimental results exhibit a good capability of the proposed method to suppress the overvoltage due to initial charge without fatal damage to the power devices. As a result, the proposed method enables removal of the initial charge circuit, resulting in a reduction in the size and cost of power converters. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00939994
- Volume :
- 55
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Industry Applications
- Publication Type :
- Academic Journal
- Accession number :
- 137379615
- Full Text :
- https://doi.org/10.1109/TIA.2019.2912800