A novel neutral point potential stabilization technique using the information of output current polarities and voltage vector

Yamanaka K., Hava A., Kirino H., Tanaka Y., Koga N., Kume T.

IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, vol.38, no.6, pp.1572-1580, 2002 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 38 Issue: 6
  • Publication Date: 2002
  • Doi Number: 10.1109/tia.2002.804761
  • Journal Name: IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1572-1580
  • Keywords: current polarity, inverter, neutral point potential, space vector, stabilization
  • Middle East Technical University Affiliated: Yes

Abstract

This paper proposes a new neutral point potential control technique for the neutral-point-clamped three-level inverter. Utilizing the phase current polarity information, this technique distributes the redundant voltage vectors in a manner to obtain stable neutral point voltage under all operating conditions including the zero-power-factor condition. Detailed analysis and computer simulations show the superiority of the proposed method. The feasibility of the proposed method has been proven via laboratory experiments.