JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2011, Vol. 41 ›› Issue (6): 128-135.

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A bridge-type protection topology for 3-phase 4-wire current  output inverters and its parameter selection method

GONG Yu-lei1,2, TAN Xing-guo2, LI Qing-min2, WANG Hui2, SUN Yong3   

  1. 1. School of Electrical  Engineering,  Jinan University, Jinan 250022, China; 2. School of Electrical Engineering,
    Shandong University, Jinan 250061, China;
    3. Shandong Electic Power Research Institute, Jinan 250021, China
  • Received:2010-11-15 Online:2011-12-16 Published:2010-11-15

Abstract:

The inverter’s actual model was built with the consideration of passive devices’ un-ideal models and the impact of distributed impedance. The causes and potential damages of pulsed current during the switching transition process of the current source inverter bridge in normal operation state was  analyzed in detail. A LCRD bridge protection circuit was presented. Detailed analysis as well as experiments based on this bridge protection topology fully validated that the topology could effectively decrease the pulsed current, current transition rate and voltage transition rate in the switching process, and could also protect  power devices from inappropriate triggers and possible damage. In addition, the parameter selection method was also given for establishing the bridge protection circuit.

Key words: inverter, reverse restoration time, pulsed current, protection circuit topology

CLC Number: 

  • TM464
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