Review of application on power electronic technology in on-load tap changer SONG Dong-dong1,2, CHENG Lin1, LIN Zhi-fa1, FAN Jing-ming3, DU Hai-jiang1

 Review of application on power electronic technology in on-load tap changer SONG Dong-dong1,2, CHENG Lin1, LIN Zhi-fa1, FAN Jing-ming3, DU Hai-jiang1 

 Abstract Various aspects of the power system operating state of dynamic change will cause voltage fluctuations, so the dynamic voltage control equipment is widely used in the power system. A combination of on-load tap changer (OLTC) and multi-tap transformer is commonly used in the regulating means, also to be the main method of power supply and distribution network in the field of low voltage control. In view of the various defects of the conventional mechanical OLTC, more attention is gradually paid to the power electronics technology. The combination of OLTC with the power electronics technology can be divided into two types: hybrid of mechanical and electrical ones and fully electronic ones. The paper summarizes the ability of arc suppression and operating principles of the new types of OLTC by status analysis of the topology, and also presents the development and key problems of application of power electronics technology in the OLTC. The paper also puts forward a reference for further study of the application of the new OLTC and the best solution for the diversified development of power system.

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