Steady-state analysis of three-phase bridge converter supplying an active load

✍ Scribed by Yaozhong Xu; V.I. John; G.E. Dawson

• Book ID: 103928253
• Publisher: Elsevier Science
• Year: 1988
• Tongue: English
• Weight: 439 KB
• Volume: 11
• Category: Article
• ISSN: 0895-7177
• DOI: 10.1016/0895-7177(88)90673-5

✦ Synopsis

This paper describes the analysis of the steady-state performance of a three phase six-pulse thyristor controlled converter feeding a dc back emf load in series with a resistance and a smoothing dc link inductance, A complete current and voltage solution for the balanced three-phase converter system is derived together with the harmonic spectrum analysis for both voltage and current on both dc and ac side.

A novel method is used in deriving the complete results. The method utilizes the symmetrical property of three-phase ac supply systems in saving computing time by a factor of m which is the pulse number of the converter, Digital computer programs are developed to simulate the steadystate performance of such a system. The losses and forward voltage drops of the conducting thyristors are taken into consideration by employing a first order thyristor model. The proposed method can be extended to the analysis of a more generalized system which considers ac system imbalances both in structure and in supply voltages and takes the filters both on dc and ac side into account.

Keyword: Three phase thyristor controlled bridge converter, harmonic analysis, source symmetrical transformation.