Filip Kutt

SSFR test of synchronous machine for different saturation levels using finite-element method

In this paper the Standstill Frequency Response characteristics (SSFR) of saturated synchronous generator (SG) have been calculated using Finite Element Method (FEM) analysis. In order to validate proposed approach for unsaturated conditions FEM simulation from Flux2D software has been compared with the measurements performed on the 10 kVA, 4-poles synchronous machine ELMOR GCe64a of salient rotor construction, equipped with a damper winding. Then, using the validated FEM model SSFR characteristics of the saturated machine have been recalculated by performing the FEM simulations with the variation of the magnetic permeability parameter.

Comparative analysis of salient and non-salient pole brushless synchronous generator for application in autonomous electric power system

This paper presents a comparative study of two types of brushless synchronous generator for application in autonomous electric power systems (e.g. airplane power grid). Commercially used salient pole and a prototype non-salient pole high speed multi-pole brushless synchronous generator (BSG) have been presented. Comparative analysis of both types of the generator has been performed. Chosen simulation (using FEM and circuit models) and measurement results have been presented.

Low speed permanent magnet synchronous generator for vertical axis wind turbine

The paper presents design process and tests of a prototype low speed permanent magnet synchronous generator (PMSG) dedicated for the innovative vertical-axis wind turbine. The rated data of the designed generator are following: power − 15 kVA, voltage − 400 V (Y), rotation speed − 93.75 rpm. The design assumptions, chosen results of the design process and experimental tests of the prototype PMSG are presented. The considered PMSG can be used in low-power wind plants applied for vessels (ships, yachts) and stationary prosumers power installations. The whole project realization (concept, design, engineering documentation, building and testing) of the prototype low-speed PMSG was commissioned by company ALU ECO Sp. o.o. Gdansk, and co-financed by the Polish Agency for Enterprise Development (PAED).

Nonlinear model of synchronous generator for autonomous electrical power systems analysis

This paper presents the nonlinear lookup table model for synchronous generator (SG) analysis. The saturation effects of the SG magnetic circuit have been considered. The saturated characteristic of the SG magnetic circuit are based on the open circuit saturation curve for magnetizing inductances. The model has been implemented into the Synopsys/Saber software using the MAST modelling language. To implement the no-load voltage characteristic of SG into the MAST model the table look-up tool has been used. Normal and fault operation of SG can be effectively studied. Developed model exhibits a network with the same number of external terminals as the real SG and represents its behaviour in terms of the electrical and mechanical variables as well. Accuracy and robustness of the nonlinear lookup table modelling approach has been confirmed by measurements performed on the 3 kVA synchronous generator.

Synchronous generator model taking into account the non-uniform saturation of the pole shoes

For the evaluation of modern electric power systems with regard to their behavior, weight, and reliability a novel modeling and simulation tools have been developed. The paper presents circuit model of synchronous generator taking into account both the non-sinusoidal distribution of the stator and rotor winding, and non-uniform saturation of the pole shoes. This model is suitable for simulation of both salient and no-salient pole generators. Winding function approach is used to define the self and mutual inductance which has enabled to take into account the non-sinusoidal distribution of stator and rotor windings. The equivalent airgap length distribution function is used to model the shape of the salient pole rotor and non-uniform saturation of the pole shoe. Simulation and experimental tests were carried out to validate this modeling method. The developed model can be used to analyze an autonomous power systems, in which a single generator has a significant impact on the power quality.