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.
Abstract. The subject of this paper is the wind powered Switched Reluctance Generator -SRG and its behavior. Simulations and experimental results are presented. It was analyzed the efficiency of SRG under different conditions. Many operational test were conduced to state clearly the behavior of a prototype drove by a half-bridge (HB) converter. Variable excitation voltage and angular speed relationship is clearly established. It shows that the suitable excitation control for a wind powered SRG must adjust the operation parameters to match the desired point on certain surfaces.
The distribution of short-circuit current is investigated by means of two methods, one direct and the other analytic; both methods consider uniform probability distribution of line faults. In the direct method, the procedure consists of calculating fault currents at equidistant points along the line, starting kom one of the end points and considering the other end open. The magnitude of the current is classified according to Brazilian standards (regulation NBR-7118). The analytic method assumes that the distribution of short4rcuit currents through the busbar and the distribution of the line lenght connected to it are know& as well as the independence of values. The method is designed to determine the probability that fault currents through a line will surpass the preestablished magnitude, thus generating kequency distribution curves of shortcircuit currents along the lines.
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