Abstract
This paper presents the magnetic field characteristics of a synchronous generator with a salient pole structure using a simple magnetic equivalent circuit (MEC) method. This method aims to reduce the analysis time considering nonlinearity. By using the MEC, a solution for the magnetic flux density is obtained. The linkage flux is derived using the magnetic flux density of the air gap and the armature voltage is obtained. Additionally, results obtained using the finite-element method and MEC are validated against experimental data.
Highlights
Global energy consumption has increased rapidly in recent decades
The wound-rotor synchronous generator (WRSG) can maintain the rated voltage according to the load fluctuation; it is optimal for hydropower generators as it can cope with the change in operation chracteristics
This paper presents an magnetic equivalent circuit (MEC) model for a 900-kW-class WRSG considering nonlinearity
Summary
Global energy consumption has increased rapidly in recent decades. Improving energy efficiency using distributed energy resources (DERs) is a key area of study. The wound-rotor synchronous generator (WRSG) can maintain the rated voltage according to the load fluctuation; it is optimal for hydropower generators as it can cope with the change in operation chracteristics.. The finite element method (FEM), which is high accuracy of analysis is a high accuracy method, is used to analyze the electromagnetic characteristics of a WRSG; it has a disadvantage in that it takes a long time to improve the accuracy of the analysis. The MEC method can be used to obtain the magnetic flux density and the back electromagnetic flux (EMF). These results are compared to those obtained via the FEM and those obtained experimentally
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