FINITE-ELEMENT ANALYSIS OF ACCIDENTAL ENERGIZING OF AN OFF-LINE TURBOGENERATOR
Journal Title: Power Electronics and Drives - Year 2017, Vol 1, Issue 1
Abstract
Background: Presented article shows the computation results of accidental off-line turbogenerator energizing. Inadvertent energizing of turbogenerator has been a particular issue in the power plant. The investigated case is three phase energizing. The great emphasis is placed on the physical phenomena existing in the rotor. Material and methods: Finite-element method Field-circuit model of turbogenerator Results: Computations results allow indicate the risks of construction element damages and can confirm the set values of the limits in dedicated protection devices. Conclusions: Computation results can confirm that inadvertent energizing of the turbogenerator can damage the machine if this abnormal operating state is not detected within a few seconds. Achieved results confirm set values in the protection device dedicated for investigated accident both overcurrent and undervoltage relays. The most vulnerable construction element is rotor wedge localized near to rotor big edge Computed maximum density of induced current in conductive rotor parts equals to ca. 140 A/mm2 and can caused increase the temperature above the acceptable limits.
Authors and Affiliations
Adam Gozdowiak, Piotr Kisielewski, Ludwik Antal
Keywords
Related Articles
- EP ID EP224763
- DOI -
- Views 65
- Downloads 0
Synchrogenverter - parallel connection of synchronous generator and power converter with energy storage
Background: The paper describes novel power generation topology wherein synchronous generator have a parallel connected power electronic converter. In this arrangement synchronous generator is only source of active power...
Dynamic Performance of Estimator-Based Speed Sensorless Control of Induction Machines using Extended and Unscented Kalman Filters
This paper presents an estimator-based speed sensorless field oriented control (FOC) method for induction machines, where the state estimator is based on a self-contained, non-linear model. This model characterizes both...
SIMULATION ANALYSIS OF EXTENDED KALMAN FILTER APPLIED FOR ESTIMATING POSITION AND SPEED OF A BRUSHLESS DC MOTOR
The purpose of the paper is to present a method for estimation of the BLDC motor rotor speed and position. The BLDC motor state equations were developed and the model was discretized. EKF has been designed to observe spe...
Effects of the grid disturbances on Current Source Rectifier controlled by FCS-MPC algorithm
Nowadays, the increasing number of nonlinear loads influence the grid causing grid voltage disturbances. Those disturbances may be very dangerous for the equipment and can create faults in converters behavior. However, t...
Effects of Grid Disturbances on Current Source Rectifier Controlled by FCS-MPC Algorithm
Nowadays, the increasing number of non-linear loads influences the grid, causing grid voltage disturbances. These disturbances may be very dangerous for the equipment and can create faults in converter behaviour. However...