Abstract
In this paper, the characteristics analysis of a high-speed permanent magnet synchronous generator (PMSG) was performed considering saturation reactance. The equivalent circuit method (EMC) is a method for predicting performance in the design process of a generator. When using EMC, if the inductance of the equivalent circuit is not considering saturation, it is difficult to predict the performance of a generator accurately. Therefore, we applied a reactance that considered saturation to derive more accurate performance prediction through short-circuit analysis. The proposed method was verified using finite element method.
Highlights
High speed permanent magnet synchronous generators (PMSG) that directly drive systems without using reduction gear in turbine power generation systems are gradually increasing
We present an improved analysis method for more accurate PMSG performance prediction
In order to apply the circuit parameter derivation method used in the wound synchronous machine to PMSG, the analysis was performed based on the rotational speed and not the field current
Summary
High speed permanent magnet synchronous generators (PMSG) that directly drive systems without using reduction gear in turbine power generation systems are gradually increasing. If magnetic saturation is considered at the core, accurate prediction of output characteristics is possible.. The circuit constant of wound synchronous machine can be derived through the open circuit test and short circuit test. The characteristics of these tests are shown as opencircuit characteristic (OCC) and short-circuit characteristic (SCC). To use the circuit constant derivation method of the wound synchronous generator, the parameters in the OCC and SCC must be changed to match those of the PMSG. We present a method for deriving the saturation reactance using short circuits to analyze the characteristics of the high-speed PMSG. Circuit constant derived from the proposed method applies to EMC for more accurate performance prediction of the high-speed generator. The validity of proposed method is verified by comparing it with the results of finite element analysis
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