Behaviour of single-phase self-excited induction generator during short-circuit at terminals

Abstract

PurposeThe purpose of this paper is to present analysis of short-circuit transients in a single-phase self-excited induction generator (SP-SEIG) for different capacitor topologies. Design/methodology/approachThe paper presents field analysis of the short-circuit problem in the SP-SEIG on the base of two-dimensional field-circuit model of the generator. FindingsThe carried-out field computations of the tested SP-SEIG show that the self-excited induction generator is intrinsically protected from the results of sudden short-circuit, as output voltage and current drop rapidly to zero. Short-circuit is a problem when a series capacitor is used to improve output voltage regulation. Experimental results show that re-excitation of the generator is possible after the short-circuit is removed. Originality/valueThe originality of the paper is the presented analysis of short-circuit transients at terminals of SP-SEIG. A finite elements method-based field circuit model was used. The simulation results were validated by the measurements conducted on a laboratory test setup.

Stator current signal crossing for fault diagnosis of self-excited induction generators

“…A complete model of an induction machine functioning as a motor or self-excited generator assumes a connection between the machine's finite element field model and the selfexcitation circuit model. The field-circuit models are used to investigate the dynamic regimes of the SEIG under healthy and faulty operating conditions [4,22].…”

“…Several research studies have been carried out to investigate the external and internal faults of SEIG. In [4], due to the large peak currents in the stator windings, a sudden short-circuit at the terminals of an autonomous single-phase Self-Excited Induction Generator (SP-SEIG) could damage the generator. To avoid damage, only some experiments were performed for the case with one excitation capacitor in the auxiliary stator winding.…”

An Optimized Model of Single Phase Self Excited Induction Generator

“…Therefore, the new millennium belongs to renewable energy sources [1][2][3][4][5][6]. Sometimes in rural and remote areas, where it is difficult to install the transmission and distribution line, for such an areas SEIG is found to be suitable for power generation from such renewable energy sources due to its inherent advantages [7] such as low cost, simple construction, little maintenance, absence of dc source, brushless etc compared to conventional generator.…”