Modelling and experimental validation of internal short‐circuit fault in salient‐pole synchronous machines using numerical gap function including stator and rotor core saturation

Abstract

In this study, the winding function method is modified and used to calculate the machine inductances in two different cases, namely, a healthy case and a short-circuited stator winding case. For the first time, a numerical air-gap function is used in addition to a model of the air gap of salient-pole machines which considers the stator slot effects. The modified winding function (MWF) method introduced here is more precise when compared with previous methods. This MWF enables one to compute the air-gap function more accurately. Also a mathematical model that allows taking stator and rotor core saturation into account in both healthy and faulty conditions is presented in this study. Stator and rotor winding currents in healthy and faulty condition, obtained from experimental results, are compared with simulation results to verify the accuracy of the proposed method.

High-Order Methods Applied to Nonlinear Magnetostatic Problems

“…Instead the incremental inductance is computed from the remanent flux φ rem . Such accurate insights are beneficial in highly saturated machine control [35][36][37], and in field-weakening machine-based applications [34]. Moreover, the computational efficiency of this calculation makes it appealing in repetitive loops present in design optimization problems.…”

A Cost-Effective Redundant Digital Excitation Control System and Test Bed Experiment for Safe Power Supply for Process Industry 4.0

“…Processes 2018, 6, x FOR PEER REVIEW 3 of 29 with the generator stators or rotors [12][13][14]. Also, The defects in power system components have been a serious problem in modern power systems and many system errors caused by such defects were continuously reported in the last few decades [15][16][17][18][19].…”

Non‐linear circuit based model of permanent magnet synchronous machine under inter‐turn fault: a simple approach based on healthy machine data

“…When the machine geometry is available, FE methods or permeance networks [6,7,8] allow the computation of these inductances under faulty conditions. Another approach consists of representing the faulty machine by a set of non-linear differential equations where a map of the machine's fluxes and their derivatives vs. the different currents are introduced ; their computation being performed by FE, permeance network or winding function theory [9,10,11]. However, the use of these approaches requires, again, the knowledge of the machine geometry and the B-H curves of the ferromagnetic materials but the computation time is lower than the full FE analyses.…”