Park Vector Based Sliding Mode Control of UPS With Unbalanced and Nonlinear Load

Authors

  • Péter Korondi
  • Hideki Hashimoto

Abstract

In this paper an inverter is taken as a member of Variable Structure System (VSS). A new Park vector based variable structure control (VSC) method is proposed. A modified definition of the Park vector is introduced to handle the effect of zero phase-sequence component caused by an asymmetrical load. The design of a sliding mode controller consists of two main steps. Firstly, the design of the sliding surface, secondly, the design of the control which holds the system trajectory on the sliding surface. A complex sliding surface is proposed. The inverter is switched in such a way that the system trajectory gets as close to the sliding surface as possible. This paper focuses on the switching rule. Experimental results of a 100 KVA inverter are presented.

Keywords:

sliding mode, UPS, unbalanced load, Park vector

How to Cite

Korondi, P., Hashimoto, H. “Park Vector Based Sliding Mode Control of UPS With Unbalanced and Nonlinear Load”, Periodica Polytechnica Electrical Engineering, 43(1), pp. 65–79, 1999.

Issue

Section

Articles