Dependence of the switched reluctance generator output on the speed and the excitation voltage

Abstract

This paper analyses the dependence of the output power and voltage of a Switched Reluctance Generator prototype on its angular speed and excitation voltage. Simulations and experimental results are presented. Many operational tests were conduced to state clearly the behavior of a prototype triggered by a Half-Bridge (HB) converter. Variable excitation voltage and angular speed relationship dependences are clearly established. It shows that the suitable excitation control for a wind powered Switched Reluctance Generator must adjust the operational parameters to match the desired point on certain surfaces of control.

Switched Reluctance Generator for Variable Speed Wind Energy Applications

“…Current research shows that the output power and voltage depend on angular speed and excitation voltage. By adjusting the excitation voltage the output power can be controlled [22]. This shows the importance of firing angles on output power.…”

“…Apart from the firing angles, the SRG structure also plays a role in terms of efficiency. Higher number of poles is suggested in [22] for wind energy applications. The common types of poles configuration used are the 8/6 or 12/8.…”

Transient Characteristics of Cylindrical Stator 6/2 Switched Reluctance Generator

“…The voltage equation for each phase (V ph ) of SRG is given [4,5,9,10,12] by V ph = I ph R ph + { d λ / d t } (1) If the effects of saturation are neglected this expression can be rewritten as:…”

Simulação, projeto e teste de um gerador a relutância chaveado trifásico 6 x 4

“…Os parâmetros de controle no GRC aplicado a geração eólica de energia é o inicio e o fim da excitação e a velocidade (FLEURY, 2008), pois nesta aplicação a máquina só opera no modo gerador. Em (FLEURY et al, 2008a(FLEURY et al, , 2008c é apresentada uma superfície de controle levando em consideração a variação da velocidade e a tensão de excitação.…”

“…As considerações iniciais para execução do projeto podem ser vistas na Tabela 5.1. A velocidade nominal foi selecionada em 1300 rpm devido resultados apresentados em (FLEURY, 2008;FLEURY et al, 2008;FLEURY et al, 2008a;RIBEIRO et al, 2008), trabalhos estes que utilizam um gerador 6 x 4 com uma potência próxima da escolhida neste trabalho.…”